release v0.18.9

Has been superseded by the previous commit.

.gitignore

@@ -1,12 +1,11 @@
 *.Plo
 *.Po
 *.a
-*.bz2
 *.d
-*.gz
 *.la
 *.lo
 *.o
+*.exe
 .deps
 .dirstamp
 Makefile
@@ -32,14 +31,16 @@ libtool
 ltmain.sh
 missing
 mkinstalldirs
+/test-driver
 mpd
-mpd.exe
 mpd.service
 stamp-h1
 tags
 *~
 .#*
 .stgit*
+src/dsd2pcm/dsd2pcm
+src/win/mpd_win32_rc.rc
 doc/doxygen.conf
 doc/protocol.html
 doc/protocol
@@ -61,3 +62,20 @@ test/dump_playlist
 test/run_normalize
 test/tmp
 test/run_inotify
+test/test_queue_priority
+test/run_ntp_server
+test/run_resolver
+test/run_tcp_connect
+test/test_pcm
+test/dump_rva2
+test/dump_text_file
+test/test_util
+test/test_byte_reverse
+test/test_mixramp
+test/test_vorbis_encoder
+test/DumpDatabase
+
+/*.tar.gz
+/*.tar.bz2
+/*.tar.xz
+/mpd-*/

AUTHORS

@@ -1,67 +1,31 @@
-Current Developers
-------------------
+Music Player Daemon - http://www.musicpd.org
+Copyright (C) 2003-2013 The Music Player Daemon Project
 
-Avuton Olrich <avuton@gmail.com>
-	release manager
+The following people have contributed code to MPD:
 
-Max Kellermann <max@duempel.org>
-	lead developer
-
-Laszlo Ashin <kodest@gmail.com>
-	WavPack support
-
-Viliam Mateicka <viliam.mateicka@gmail.com>
-	FFmpeg support, mixer and archive API
-
-Eric Wollesen <encoded@xmtp.net>
-	encoder API, shout output
-
-Thomas Jansen <mithi@mithi.net>
-	multithreading tweaks, miscellaneous
-
-Romain Bignon <romain@peerfuse.org>
-	playlist manipulation
-
-David Guibert <david.guibert@gmail.com>
-	PulseAudio mixer
-
-Jochen Keil <jochen.keil@gmail.com>
-	CUE sheet support
-
-Jeffrey Middleton <jefromi@gmail.com>
-	playlist manipulation
-
-Sean McNamara <smcnam@gmail.com>
-	WIN32 compatibility
-
-
-Former Developers
------------------
-
-Warren Dukes <warren.dukes@gmail.com>
-	former lead developer and project founder
-
-Niklas Hofer
-	'next' and 'previous' patch
-
-Jim Ramsay <i.am@jimramsay.com>
-	Zerconf/avahi support
-
-Guus Sliepen <guus@sliepen.eu.org>
-	libsamplerate code
-
-J. Alexander Treuman <jat@spatialrift.net>
-	general, MP3, ID3, PulseAudio, format conversion, stored playlists
-	AudioCompress, much much more...
-
-Eric Wong
-	former lead developer
-
-José Anarch <anarchsss@gmail.com>
-	JACK plugin
-
-Patrik Weiskircher <pat@icore.at>
-	Stored playlist commands
-
-Nick Welch <mack@incise.org>
-	Sighandlers
+ Warren Dukes <warren.dukes@gmail.com>
+ Avuton Olrich <avuton@gmail.com>
+ Max Kellermann <max@duempel.org>
+ Laszlo Ashin <kodest@gmail.com>
+ Viliam Mateicka <viliam.mateicka@gmail.com>
+ Eric Wollesen <encoded@xmtp.net>
+ Thomas Jansen <mithi@mithi.net>
+ Romain Bignon <romain@peerfuse.org>
+ David Guibert <david.guibert@gmail.com>
+ Jochen Keil <jochen.keil@gmail.com>
+ Jeffrey Middleton <jefromi@gmail.com>
+ Sean McNamara <smcnam@gmail.com>
+ Niklas Hofer
+ Jim Ramsay <i.am@jimramsay.com>
+ Guus Sliepen <guus@sliepen.eu.org>
+ J. Alexander Treuman <jat@spatialrift.net>
+ Eric Wong
+ José Anarch <anarchsss@gmail.com>
+ Patrik Weiskircher <pat@icore.at>
+ Nick Welch <mack@incise.org>
+ Jonathan Neuschäfer <j.neuschaefer@gmx.net>
+ Anton Khirnov <anton@khirnov.net>
+ Simon Kagstrom <simon.kagstrom@gmail.com>
+ Denis Krjuchkov <denis@crazydev.net>
+ Jurgen Kramer <gtmkramer@xs4all.nl>
+ Jean-Francois Dockes <jf@dockes.org>

INSTALL

@@ -3,17 +3,20 @@
 
 Introduction
 ------------
+
 This document is a very small amount of documentation about what is needed to 
-install MPD. If more information is desired see the community wiki at 
-http://mpd.wikia.com.
+install MPD.  If more information is desired, read the user manual:
+
+ http://www.musicpd.org/doc/user/
 
 Dependencies
 ------------
 
-gcc - http://gcc.gnu.org/
-Any other C99 compliant compiler should also work.
+gcc 4.6 or later - http://gcc.gnu.org/
+clang 3.2 or later - http://clang.llvm.org/
+Any other C++11 compliant compiler should also work.
 
-GLib 2.12 - http://www.gtk.org/
+GLib 2.28 - http://www.gtk.org/
 General-purpose utility library.
 
 
@@ -37,15 +40,9 @@ Linux.  You will need libasound.
 FIFO
 This is a mostly undocumented, developer plugin to transmit raw data.
 
-MVP - http://en.wikipedia.org/wiki/Hauppauge_MediaMVP
-A network media player.
-
 OSS - http://www.opensound.com
 Open Sound System.
 
-OSX - http://www.apple.com
-Necessary if you are on Mac OSX.
-
 PulseAudio - http://www.pulseaudio.org/
 An advanced sound daemon.  You will need libpulse.
 
@@ -59,9 +56,6 @@ You also need an encoder: either libvorbisenc (ogg), or liblame (mp3).
 OpenAL - http://kcat.strangesoft.net/openal.html
 Open Audio Library
 
-libffado - http://www.ffado.org/
-For FireWire audio devices.
-
 
 Optional Input Dependencies
 ---------------------------
@@ -81,19 +75,17 @@ Alternative for MP3 support.
 Ogg Vorbis - http://www.xiph.org/ogg/vorbis/
 For Ogg Vorbis support.  You will need libogg and libvorbis.
 
-FLAC - http://flac.sourceforge.net/
-For FLAC support.  You will need version 1.1.0 or higher of libflac.
+libopus - http://www.opus-codec.org/
+Opus codec support
 
-OggFLAC - http://www.xiph.org/ogg/vorbis/ and http://flac.sourceforge.net/
-For OggFLAC support.  You will need liboggflac, which can be built from the
-FLAC sources if libogg is already installed.  Versions of flac 1.1.3 and
-greater will automatically detect and use OggFLAC if it's available.
+FLAC - http://flac.sourceforge.net/
+For FLAC support.  You will need version 1.2 or higher of libFLAC.
 
 Audio File - http://www.68k.org/~michael/audiofile/
 For WAVE, AIFF, and AU support.  You will need libaudiofile.
 
 FAAD2 - http://www.audiocoding.com/
-For MP4/AAC support.  You will need libmp4ff.
+For MP4/AAC support.
 
 libmpcdec - http://www.musepack.net/
 For Musepack support.
@@ -101,16 +93,16 @@ For Musepack support.
 MikMod - http://mikmod.raphnet.net/
 For MOD support.  You will need libmikmod.
 
-libavcodec, libavformat (ffmpeg) - http://ffmpeg.mplayerhq.hu/
+libavcodec, libavformat (ffmpeg or libav) - http://ffmpeg.mplayerhq.hu/ http://libav.org/
 Multi-codec library.
 
 libsidplay2 - http://sidplay2.sourceforge.net/
 For C64 SID support.
 
 libfluidsynth - http://fluidsynth.resonance.org/
-For MIDI support (DO NOT USE - use libwildmidi instead)
+For MIDI support.
 
-libwildmidi - http://wildmidi.sourceforge.net/
+libwildmidi 0.2.3 - http://wildmidi.sourceforge.net/
 For MIDI support.
 
 libsndfile - http://www.mega-nerd.com/libsndfile/
@@ -119,6 +111,12 @@ WAVE, AIFF, and many others.
 libwavpack - http://www.wavpack.com/
 For WavPack playback.
 
+libadplug - http://adplug.sourceforge.net/
+For AdLib playback.
+
+despotify - https://github.com/SimonKagstrom/despotify
+For Spotify playback.
+
 
 Optional Miscellaneous Dependencies
 -----------------------------------
@@ -138,8 +136,11 @@ For playing MMS streams.
 SQLite - http://www.sqlite.org/
 For the sticker database.
 
-libcue - http://libcue.sourceforge.net/
-For CUE sheet support.
+libcdio - http://www.gnu.org/software/libcdio/
+For playing audio CDs.
+
+libsystemd-daemon - http://freedesktop.org/wiki/Software/systemd/
+For systemd activation.
 
 
 pkg-config
@@ -162,13 +163,9 @@ Get the latest release from of MPD from <http://www.musicpd.org/>.
 Compile
 -------
 
-1) unzip and untar the archive
+1) unpack the archive
 
-$ tar zxvf mpd-x.x.x.tar.gz
-
-or
-
-$ tar jxvf mpd-x.x.x.tar.bz2
+$ tar xf mpd-x.x.x.tar.xz
 
 2) change to directory created
 
@@ -195,9 +192,9 @@ Run
 
 $ mpd <config file>
 
-First default is ~/.mpdconf then ~/.mpd/mpd.conf then /etc/mpd.conf. If
-neither of these exist a mpd configuration file must be specified at
-runtime.
+First default is $XDG_CONFIG_HOME/mpd/mpd.conf then ~/.mpdconf then
+~/.mpd/mpd.conf then /etc/mpd.conf. If neither of these exist a mpd
+configuration file must be specified at runtime.
 
 A sample config file is included with the source of MPD, mpdconf.example.
 
@@ -209,6 +206,5 @@ Using MPD
 ---------
 
 You can download many different interfaces for MPD at 
-	<http://mpd.wikia.com/wiki/Clients>
 
-MPD can be interfaced directly using telnet (see COMMANDS, if you are brave).
+ http://www.musicpd.org/clients/

NEWS

@@ -1,3 +1,271 @@
+ver 0.18.9 (2014/03/02)
+* protocol
+  - "findadd" requires the "add" permission
+* output
+  - alsa: improved workaround for noise after manual song change
+* decoder
+  - vorbis: fix linker failure when libvorbis/libogg are static
+* encoder
+  - vorbis: fix another linker failure
+* output
+  - pipe: fix hanging child process due to blocked signals
+* fix build failure due to missing signal.h include
+
+ver 0.18.8 (2014/02/07)
+* decoder
+  - ffmpeg: support libav v10_alpha1
+* encoder
+  - vorbis: fix linker failure
+* output
+  - roar: documentation
+* more robust Icy-Metadata parser
+* fix Solaris build failure
+
+ver 0.18.7 (2014/01/13)
+* playlist
+  - pls: fix crash after parser error
+  - soundcloud: fix build failure with libyajl 2.0.1
+* decoder
+  - faad: fix memory leak
+  - mpcdec: reject libmpcdec SV7 in configure script
+* daemon: don't initialize supplementary groups when already running
+  as the configured user
+
+ver 0.18.6 (2013/12/24)
+* input
+  - cdio_paranoia: support libcdio-paranoia 0.90
+* tags
+  - riff: recognize upper-case "ID3" chunk name
+* decoder
+  - ffmpeg: use relative timestamps
+* output
+  - openal: fix build failure on Mac OS X
+  - osx: fix build failure
+* mixer
+  - alsa: fix build failure with uClibc
+* fix replay gain during cross-fade
+* accept files without metadata
+
+ver 0.18.5 (2013/11/23)
+* configuration
+  - fix crash when db_file is configured without music_directory
+  - fix crash on "stats" without db_file/music_directory
+* database
+  - proxy: auto-reload statistics
+  - proxy: provide "db_update" in "stats" response
+* input
+  - curl: work around stream resume bug (fixed in libcurl 7.32.0)
+* decoder
+  - fluidsynth: auto-detect by default
+* clip 24 bit data from libsamplerate
+* fix ia64, mipsel and other little-endian architectures
+* fix build failures due to missing includes
+* fix build failure with static libmpdclient
+
+ver 0.18.4 (2013/11/13)
+* decoder
+  - dsdiff: fix byte order bug
+* fix build failures due to missing includes
+* libc++ compatibility
+
+ver 0.18.3 (2013/11/08)
+* fix stuck MPD after song change (0.18.2 regression)
+
+ver 0.18.2 (2013/11/07)
+* protocol:
+  - "close" flushes the output buffer
+* input:
+  - cdio_paranoia: add setting "default_byte_order"
+  - curl: fix bug with redirected streams
+* playlist:
+  - pls: fix reversed song order
+* decoder:
+  - audiofile: require libaudiofile 0.3 due to API breakage
+  - dsf: enable DSD128
+* enable buffering when starting playback (regression fix)
+* fix build failures due to missing includes
+* fix big-endian support
+
+ver 0.18.1 (2013/11/04)
+* protocol:
+  - always ignore whitespace at the end of the line
+* networking:
+  - log UNIX domain path names instead of "localhost"
+  - open listener sockets in the order they were configured
+  - don't abort if IPv6 is not available
+* output:
+  - alsa: avoid endless loop in Raspberry Pi workaround
+* filter:
+  - autoconvert: fix "volume_normalization" with mp3 files
+* add missing files to source tarball
+
+ver 0.18 (2013/10/31)
+* configuration:
+  - allow tilde paths for socket
+  - default filesystem charset is UTF-8 instead of ISO-8859-1
+  - increase default buffer size to 4 MB
+* protocol:
+  - new command "readcomments" lists arbitrary file tags
+  - new command "toggleoutput"
+  - "find"/"search" with "any" does not match file name
+  - "search" and "find" with base URI (keyword "base")
+  - search for album artist falls back to the artist tag
+  - re-add the "volume" command
+* input:
+  - curl: enable https
+  - soup: plugin removed
+* playlist:
+  - lastfm: remove defunct Last.fm support
+* decoder:
+  - adplug: new decoder plugin using libadplug
+  - dsf: don't play junk at the end of the "data" chunk
+  - ffmpeg: drop support for pre-0.8 ffmpeg
+  - flac: require libFLAC 1.2 or newer
+  - flac: support FLAC files inside archives
+  - opus: new decoder plugin for the Opus codec
+  - vorbis: skip 16 bit quantisation, provide float samples
+  - mikmod: add "loop" configuration parameter
+  - modplug: add "loop_count" configuration parameter
+  - mp4ff: obsolete plugin removed
+* encoder:
+  - opus: new encoder plugin for the Opus codec
+  - vorbis: accept floating point input samples
+* output:
+  - new option "tags" may be used to disable sending tags to output
+  - alsa: workaround for noise after manual song change
+  - ffado: remove broken plugin
+  - httpd: support HEAD requests
+  - mvp: remove obsolete plugin
+  - osx: disabled by default because it's unmaintained and unsupported
+* improved decoder/output error reporting
+* eliminate timer wakeup on idle MPD
+* fix unresponsive MPD while waiting for stream
+* port of the source code to C++11
+
+ver 0.17.6 (2013/10/14)
+* mixer:
+  - alsa: fix busy loop when USB sound device gets unplugged
+* decoder:
+  - modplug: fix build with Debian package 1:0.8.8.4-4
+* stored playlists:
+  - fix loading playlists with references to local files
+  - obey filesystem_charset for URLs
+
+ver 0.17.5 (2013/08/04)
+* protocol:
+  - fix "playlistadd" with URI
+  - fix "move" relative to current when there is no current song
+* decoder:
+  - ffmpeg: support "application/flv"
+  - mikmod: adapt to libmikmod 3.2
+* configure.ac:
+  - detect system "ar"
+
+ver 0.17.4 (2013/04/08)
+* protocol:
+  - allow to omit END in ranges (START:END)
+  - don't emit IDLE_PLAYER before audio format is known
+* decoder:
+  - ffmpeg: support float planar audio (ffmpeg 1.1)
+  - ffmpeg: fix AVFrame allocation
+* player:
+  - implement missing "idle" events on output errors
+* clock: fix build failure
+
+ver 0.17.3 (2013/01/06)
+* output:
+  - osx: fix pops during playback
+  - recorder: fix I/O error check
+  - shout: fix memory leak in error handler
+  - recorder, shout: support Ogg packets that span more than one page
+* decoder:
+  - ffmpeg: ignore negative time stamps
+  - ffmpeg: support planar audio
+* playlist:
+  - cue: fix memory leak
+  - cue: fix CUE files with only one track
+
+ver 0.17.2 (2012/09/30)
+* protocol:
+  - fix crash in local file check
+* decoder:
+  - fluidsynth: remove throttle (requires libfluidsynth 1.1)
+  - fluidsynth: stop playback at end of file
+  - fluidsynth: check MIDI file format while scanning
+  - fluidsynth: add sample rate setting
+  - wavpack: support all APEv2 tags
+* output:
+  - httpd: use monotonic clock, avoid hiccups after system clock adjustment
+  - httpd: fix throttling bug after resuming playback
+* playlist:
+  - cue: map "PERFORMER" to "artist" or "album artist"
+* mapper: fix non-UTF8 music directory name
+* mapper: fix potential crash in file permission check
+* playlist: fix use-after-free bug
+* playlist: fix memory leak
+* state_file: save song priorities
+* player: disable cross-fading in "single" mode
+* update: fix unsafe readlink() usage
+* configure.ac:
+  - don't auto-detect the vorbis encoder when Tremor is enabled
+
+ver 0.17.1 (2012/07/31)
+* protocol:
+  - require appropriate permissions for searchadd{,pl}
+* tags:
+  - aiff: support the AIFC format
+  - ape: check for ID3 if no usable APE tag was found
+* playlist:
+  - cue: support file types "MP3", "AIFF"
+* output:
+  - fix noisy playback with conversion and software volume
+
+ver 0.17 (2012/06/27)
+* protocol:
+  - support client-to-client communication
+  - "update" and "rescan" need only "CONTROL" permission
+  - new command "seekcur" for simpler seeking within current song
+  - new command "config" dumps location of music directory
+  - add range parameter to command "load"
+  - print extra "playlist" object for embedded CUE sheets
+  - new commands "searchadd", "searchaddpl"
+* input:
+  - cdio_paranoia: new input plugin to play audio CDs
+  - curl: enable CURLOPT_NETRC
+  - curl: non-blocking I/O
+  - soup: new input plugin based on libsoup
+* tags:
+  - RVA2: support separate album/track replay gain
+* decoder:
+  - mpg123: implement seeking
+  - ffmpeg: drop support for pre-0.5 ffmpeg
+  - ffmpeg: support WebM
+  - oggflac: delete this obsolete plugin
+  - dsdiff: new decoder plugin
+* output:
+  - alsa: support DSD-over-USB (dCS suggested standard)
+  - httpd: support for streaming to a DLNA client
+  - openal: improve buffer cancellation
+  - osx: allow user to specify other audio devices
+  - osx: implement 32 bit playback
+  - shout: add possibility to set url
+  - roar: new output plugin for RoarAudio
+  - winmm: fail if wrong device specified instead of using default device
+* mixer:
+  - alsa: listen for external volume changes
+* playlist:
+  - allow references to songs outside the music directory
+  - new CUE parser, without libcue
+  - soundcloud: new plugin for accessing soundcloud.com
+* state_file: add option "restore_paused"
+* cue: show CUE track numbers
+* allow port specification in "bind_to_address" settings
+* support floating point samples
+* systemd socket activation
+* improve --version output
+* WIN32: fix renaming of stored playlists with non-ASCII names
+
+
 ver 0.16.8 (2012/04/04)
 * fix for libsamplerate assertion failure
 * decoder:

autogen.sh

@@ -16,7 +16,7 @@ if test -n "$AM_FORCE_VERSION"
 then
 	AM_VERSIONS="$AM_FORCE_VERSION"
 else
-	AM_VERSIONS='1.11 1.10'
+	AM_VERSIONS='1.11'
 fi
 if test -n "$AC_FORCE_VERSION"
 then

doc/developer.xml

@@ -32,23 +32,16 @@
 
       <listitem>
         <para>
-          don't write CPP when you can write C: use inline functions
-          and enums instead of macros
+          don't write CPP when you can write C++: use inline
+          functions and constexpr instead of macros
         </para>
       </listitem>
 
       <listitem>
         <para>
-          the code should be C99 compliant, and must compile with
-          <application>GCC</application>;
-          <application>clang</application> support is highly desirable
-        </para>
-      </listitem>
-
-      <listitem>
-        <para>
-          C++ is ok (for integrating C++ only libraries), but it
-          should be avoided
+          the code should be C++11 compliant, and must compile with
+          <application>GCC</application> 4.6 and
+          <application>clang</application> 3.2
         </para>
       </listitem>
 
@@ -61,7 +54,7 @@
 foo(const char *abc, int xyz)
 {
         if (abc == NULL) {
-                g_warning("Foo happened!\n");
+                LogWarning("Foo happened!");
                 return -1;
         }
 
@@ -75,12 +68,28 @@ foo(const char *abc, int xyz)
   <chapter>
     <title>Hacking The Source</title>
 
+    <para>
+      MPD sources are managed in a git repository on <ulink
+      url="http://git.musicpd.org/">git.musicpd.org</ulink>.
+    </para>
+
     <para>
       Always write your code against the latest git:
     </para>
 
     <programlisting>git clone git://git.musicpd.org/master/mpd.git</programlisting>
 
+    <para>
+      If you already have a clone, update it:
+    </para>
+
+    <programlisting>git pull --rebase git://git.musicpd.org/master/mpd.git master</programlisting>
+
+    <para>
+      You can do without "--rebase", but we recommend that you rebase
+      your repository on the "master" repository all the time.
+    </para>
+
     <para>
       Configure with the options <option>--enable-debug
       --enable-werror</option>.  Enable as many plugins as possible,
@@ -90,8 +99,55 @@ foo(const char *abc, int xyz)
     <para>
       Don't mix several changes in one single patch.  Create a
       separate patch for every change.  Tools like
-      <application>stgit</application> help you with that.
+      <application>stgit</application> help you with that.  This way,
+      we can review your patches more easily, and we can pick the
+      patches we like most first.
     </para>
+
+
+    <section>
+      <title> Basic stgit usage</title>
+
+      <para>
+        stgit allows you to create a set of patches and refine all of
+        them: you can go back to any patch at any time, and re-edit it
+        (both the code and the commit message). You can reorder
+        patches and insert new patches at any position. It encourages
+        creating separate patches for tiny changes.
+      </para>
+
+      <para>
+        stgit needs to be initialized on a git repository: stg init
+      </para>
+
+      <para>
+        Before you edit the code, create a patch: stg new
+        my-patch-name (stgit now asks you for the commit message).
+      </para>
+
+      <para>
+        Now edit the code. Once you're finished, you have to "refresh"
+        the patch, i.e. your edits are incorporated into the patch you
+        have created: stg refresh
+      </para>
+
+      <para>
+        You may now continue editing the same patch, and refresh it as
+        often as you like. Create more patches, edit and refresh them.
+      </para>
+
+      <para>
+        To view the list of patches, type stg series. To go back to a
+        specific patch, type stg goto my-patch-name; now you can
+        re-edit it (don't forget stg refresh when you're finished with
+        that patch).
+      </para>
+
+      <para>
+        When the whole patch series is finished, convert stgit patches
+        to git commits: stg commit
+      </para>
+    </section>
   </chapter>
 
   <chapter>
@@ -99,7 +155,7 @@ foo(const char *abc, int xyz)
 
     <para>
       Send your patches to the mailing list:
-      musicpd-dev-team@lists.sourceforge.net
+      mpd-devel@musicpd.org
     </para>
   </chapter>
 </book>

doc/doxygen.conf.in

@@ -31,7 +31,7 @@ PROJECT_NAME           = MPD
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER         =
+PROJECT_NUMBER = @VERSION@
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute)
 # base path where the generated documentation will be put.
@@ -481,7 +481,7 @@ FILE_VERSION_FILTER    =
 # The QUIET tag can be used to turn on/off the messages that are generated
 # by doxygen. Possible values are YES and NO. If left blank NO is used.
 
-QUIET                  = NO
+QUIET                  = YES
 
 # The WARNINGS tag can be used to turn on/off the warning messages that are
 # generated by doxygen. Possible values are YES and NO. If left blank
@@ -534,7 +534,7 @@ WARN_LOGFILE           =
 # directories like "/usr/src/myproject". Separate the files or directories
 # with spaces.
 
-INPUT = src/
+INPUT = @abs_top_srcdir@/src/
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is
@@ -1158,7 +1158,7 @@ INCLUDE_FILE_PATTERNS  =
 # undefined via #undef or recursively expanded use the := operator
 # instead of the = operator.
 
-PREDEFINED             = G_GNUC_UNUSED=
+PREDEFINED             =
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then
 # this tag can be used to specify a list of macro names that should be expanded.

doc/mpd.1

@@ -12,29 +12,29 @@ stores info about all available music, and this info can be easily searched and
 retrieved.  Player control, info retrieval, and playlist management can all be
 managed remotely.
 
-MPD searches for a config file in \fB~/.mpdconf\fP then \fB/etc/mpd.conf\fP or
-uses CONF_FILE.
+MPD searches for a config file in \fB$XDG_CONFIG_HOME/mpd/mpd.conf\fP then
+\fB~/.mpdconf\fP then \fB/etc/mpd.conf\fP or uses CONF_FILE.
 
 Read more about MPD at <\fBhttp://www.musicpd.org/\fP>.
 .SH OPTIONS
 .TP
-.BI --help
+.BI \-\-help
 Output a brief help message.
 .TP
-.BI --kill
+.BI \-\-kill
 Kill the currently running mpd session.  The pid_file parameter must be
 specified in the config file for this to work.
 .TP
-.BI --no-daemon
+.BI \-\-no\-daemon
 Don't detach from console.
 .TP
-.BI --stderr
+.BI \-\-stderr
 Print messages stderr.
 .TP
-.BI --verbose
+.BI \-\-verbose
 Verbose logging.
 .TP
-.BI --version
+.BI \-\-version
 Print version information.
 .SH FILES
 .TP
@@ -48,8 +48,8 @@ mpd.conf(5), mpc(1)
 .SH BUGS
 If you find a bug, please report it at
 .br
-<\fBhttp://www.musicpd.org/mantis/bug_report_page.php\fP>.
+<\fBhttp://bugs.musicpd.org/bug_report_page.php\fP>.
 .SH AUTHORS
-Warren Dukes <warren.dukes@gmail.com>
+Max Kellermann <max@duempel.org>
 
 Special thanks to all the people that provided feedback and patches.

doc/mpd.conf.5

@@ -3,8 +3,9 @@
 mpd.conf \- Music Player Daemon configuration file
 .SH DESCRIPTION
 \fBmpd.conf\fP is the configuration file for mpd(1).  If not specified on the
-command line, MPD first searches for it at \fB~/.mpdconf\fP then at
-\fB~/.mpd/mpd.conf\fP and then in \fB/etc/mpd.conf\fP.
+command line, MPD first searches for it at \fB$XDG_CONFIG_HOME/mpd/mpd.conf\fP
+then at \fB~/.mpdconf\fP then at \fB~/.mpd/mpd.conf\fP and then in
+\fB/etc/mpd.conf\fP.
 
 Lines beginning with a "#" character are comments.  All other non-empty lines
 specify parameters and their values.  These lines contain the parameter name
@@ -27,31 +28,24 @@ paths.
 
 See \fBdocs/mpdconf.example\fP in the source tarball for an example
 configuration file.
+
+This manual is not complete, it lists only the most important options.
+Please read the MPD user manual for a complete configuration guide:
+<\fBhttp://www.musicpd.org/doc/user/\fP>
 .SH REQUIRED PARAMETERS
 .TP
-.B follow_outside_symlinks <yes or no>
-Control if MPD will follow symbolic links pointing outside the music dir.
-You must recreate the database after changing this option.
-The default is "yes".
-.TP
-.B follow_inside_symlinks <yes or no>
-Control if MPD will follow symbolic links pointing inside the music dir,
-potentially adding duplicates to the database.
-You must recreate the database after changing this option.
-The default is "yes".
-.TP
 .B db_file <file>
 This specifies where the db file will be stored.
 .TP
-.B sticker_file <file>
-The location of the sticker database.  This is a database which
-manages dynamic information attached to songs.
-.TP
 .B log_file <file>
 This specifies where the log file should be located.
 The special value "syslog" makes MPD use the local syslog daemon.
 .SH OPTIONAL PARAMETERS
 .TP
+.B sticker_file <file>
+The location of the sticker database.  This is a database which
+manages dynamic information attached to songs.
+.TP
 .B pid_file <file>
 This specifies the file to save mpd's process ID in.
 .TP
@@ -69,6 +63,9 @@ mpd will be saved to this file when mpd is terminated by a TERM signal or by
 the "kill" command.  When mpd is restarted, it will read the state file and
 restore the state of mpd (including the playlist).
 .TP
+.B restore_paused <yes or no>
+Put MPD into pause mode instead of starting playback after startup.
+.TP
 .B user <username>
 This specifies the user that MPD will run as, if set.  MPD should
 never run as root, and you may use this option to make MPD change its
@@ -80,8 +77,13 @@ This specifies which address mpd binds to and listens on.  Multiple
 bind_to_address parameters may be specified.  The default is "any", which binds
 to all available addresses.
 
-To bind to a Unix domain socket, specify an absolute path.  For a
-system-wide MPD, we suggest the path "\fB/var/run/mpd/socket\fP".
+You can set a port that is different from the global port setting,
+e.g. "localhost:6602".  IPv6 addresses must be enclosed in square
+brackets if you want to configure a port, e.g. "[::1]:6602".
+
+To bind to a Unix domain socket, specify an absolute path or a path starting
+with a tilde (~).  For a system-wide MPD, we suggest the path
+"\fB/var/run/mpd/socket\fP".
 .TP
 .B port <port>
 This specifies the port that mpd listens on.  The default is 6600.
@@ -92,6 +94,17 @@ reports from what address a connection is opened, and when it is closed, and
 "verbose" records excessive amounts of information for debugging purposes.  The
 default is "default".
 .TP
+.B follow_outside_symlinks <yes or no>
+Control if MPD will follow symbolic links pointing outside the music dir.
+You must recreate the database after changing this option.
+The default is "yes".
+.TP
+.B follow_inside_symlinks <yes or no>
+Control if MPD will follow symbolic links pointing inside the music dir,
+potentially adding duplicates to the database.
+You must recreate the database after changing this option.
+The default is "yes".
+.TP
 .B zeroconf_enabled <yes or no>
 If yes, and MPD has been compiled with support for Avahi or Bonjour, service
 information will be published with Zeroconf.  The default is yes.
@@ -168,7 +181,7 @@ only choice) if MPD was compiled without libsamplerate.
 .RE
 .IP
 For an up-to-date list of available converters, please see the libsamplerate
-documentation (available online at <\fBhttp://www.mega-nerd.com/SRC/\fP>).
+documentation (available online at <\fBhttp://www.mega\-nerd.com/SRC/\fP>).
 .TP
 .B replaygain <off or album or track or auto>
 If specified, mpd will adjust the volume of songs played using ReplayGain tags
@@ -179,14 +192,14 @@ tags if random play is activated otherwise the album ReplayGain tags. Currently
 only FLAC, Ogg Vorbis, Musepack, and MP3 (through ID3v2 ReplayGain tags, not
 APEv2) are supported.
 .TP
-.B replaygain_preamp <-15 to 15>
+.B replaygain_preamp <\-15 to 15>
 This is the gain (in dB) applied to songs with ReplayGain tags.
 .TP
 .B volume_normalization <yes or no>
 If yes, mpd will normalize the volume of songs as they play.  The default is no.
 .TP
 .B audio_buffer_size <size in KiB>
-This specifies the size of the audio buffer in kibibytes.  The default is 2048,
+This specifies the size of the audio buffer in kibibytes.  The default is 4096,
 large enough for nearly 12 seconds of CD-quality audio.
 .TP
 .B buffer_before_play <0-100%>
@@ -209,7 +222,7 @@ default is 5.
 .TP
 .B max_playlist_length <number>
 This specifies the maximum number of songs that can be in the playlist.  The
-default is 4096.
+default is 16384.
 .TP
 .B max_command_list_size <size in KiB>
 This specifies the maximum size a command list can be.  The default is 2048.
@@ -220,12 +233,12 @@ is 8192.
 .TP
 .B filesystem_charset <charset>
 This specifies the character set used for the filesystem.  A list of supported
-character sets can be obtained by running "iconv -l".  The default is
+character sets can be obtained by running "iconv \-l".  The default is
 determined from the locale when the db was originally created.
 .TP
 .B id3v1_encoding <charset>
 This specifies the character set which ID3v1 tags are encoded in.  A list of
-supported character sets can be obtained by running "iconv -l".  The default is
+supported character sets can be obtained by running "iconv \-l".  The default is
 to let libid3tag convert them (from ISO-8859-1, as the standard specifies) and
 do no additional conversion.
 .TP
@@ -245,25 +258,37 @@ when saving playlists.  The default is "no".
 This specifies the tag types that will be scanned for and made available to
 clients.  Note that you must recreate (not update) your database for changes to
 this parameter to take effect.  Possible values are artist, album, title,
-track, name, genre, date, composer, performer, comment, and disc.  Multiple
-tags may be specified as a comma separated list.  An example value is
-"artist,album,title,track".  The special value "none" may be used alone to
-disable all metadata.  The default is to use all known tag types except for
-comments.
+track, name, genre, date, composer, performer, comment, disc,
+musicbrainz_artistid, musicbrainz_albumid, musicbrainz_albumartistid,
+musicbrainz_trackid.  Multiple tags may be specified as a comma separated list.
+An example value is "artist,album,title,track".  The special value "none" may
+be used alone to disable all metadata.  The default is to use all known tag
+types except for comments and those starting with "musicbrainz".
 .TP
 .B auto_update <yes or no>
-This specifies the wheter to support automatic update of music database when
+This specifies the whether to support automatic update of music database when
 files are changed in music_directory. The default is to disable autoupdate
 of database.
 .TP
 .B auto_update_depth <N>
 Limit the depth of the directories being watched, 0 means only watch
 the music directory itself.  There is no limit by default.
+.TP
+.B despotify_user <name>
+This specifies the user to use when logging in to Spotify using the despotify plugins.
+.TP
+.B despotify_password <name>
+This specifies the password to use when logging in to Spotify using the despotify plugins.
+.TP
+.B despotify_high_bitrate <yes or no>
+This specifies if the requested bitrate for Spotify should be high or not. Higher sounds
+better but requires more processing and higher bandwidth. Default is yes.
+.TP
 .SH REQUIRED AUDIO OUTPUT PARAMETERS
 .TP
 .B type <type>
 This specifies the audio output type.  See the list of supported outputs in mpd
---version for possible values.
+\-\-version for possible values.
 .TP
 .B name <name>
 This specifies a unique name for the audio output.
@@ -338,134 +363,6 @@ errors on bandwidth-limited devices.  Some users have reported good results
 with this set to 50000, but not all devices support values this high.  Most
 users do not need to change this.  The default is 256000000 / sample_rate(kHz),
 or 5804 microseconds for CD-quality audio.
-.SH OPTIONAL OSS OUTPUT PARAMETERS
-.TP
-.B device <dev>
-This specifies the device to use for audio output.  The default is "/dev/dsp".
-.TP
-.B mixer_device <mixer dev>
-This specifies which mixer to use.  The default is "/dev/mixer".
-.TP
-.B mixer_control <mixer ctrl>
-This specifies which mixer control to use (sometimes referred to as the
-"device").  The default is to use the main PCM mixer.  An example is "Pcm".
-.SH OPTIONAL PULSE OUTPUT PARAMETERS
-.TP
-.B server <server list>
-A space separated list of servers to try to connect to.  See
-<\fBhttp://www.pulseaudio.org/wiki/ServerStrings\fP> for more details.  The
-default is to let PulseAudio choose a server.
-If you specify more than one server name, MPD tries to connect to one
-after another until it successfully establishes a connection.
-.TP
-.B sink <sink>
-The sink to output to.  The default is to let PulseAudio choose a sink.
-.SH OPTIONAL JACK OUTPUT PARAMETERS
-.TP
-.B client_name <name>
-The client name to use when connecting to JACK.  The output ports <name>:left
-and <name>:right will also be created for the left and right channels,
-respectively.
-.TP
-.B ports <left_port,right_port>
-This specifies the left and right ports to connect to for the left and right
-channels, respectively.  The default is to let JACK choose a pair of ports.
-.TP
-.B ringbuffer_size <size in bytes>
-This specifies the size of the ringbuffer in bytes.  The default is 32768.
-.SH OPTIONAL AO OUTPUT PARAMETERS
-.TP
-.B driver <driver>
-This specifies the libao driver to use for audio output.  Possible values
-depend on what libao drivers are available.  See
-<\fBhttp://www.xiph.org/ao/doc/drivers.html\fP> for information on some
-commonly used drivers.  Typical values for Linux include "oss" and "alsa09".
-The default is "default", which causes libao to select an appropriate plugin.
-.TP
-.B options <opts>
-This specifies the options to use for the selected libao driver.  For oss, the
-only option available is "dsp".  For alsa09, the available options are: "dev",
-"buf_size", and "periods".  See <\fBhttp://www.xiph.org/ao/doc/drivers.html\fP>
-for available options for some commonly used drivers.  Options are assigned
-using "=", and ";" is used to separate options.  An example for oss:
-"dsp=/dev/dsp".  An example for alsa09: "dev=hw:0,0;buf_size=4096".  The
-default is "".
-.TP
-.B write_size <size in bytes>
-This specifies how many bytes to write to the audio device at once.  This
-parameter is to work around a bug in older versions of libao on sound cards
-with very small buffers.  The default is 1024.
-.SH REQUIRED FIFO OUTPUT PARAMETERS
-.TP
-.B path <path>
-This specifies the path of the FIFO to output to.  Must be an absolute path.
-If the path does not exist it will be created when mpd is started, and removed
-when mpd is stopped.  The FIFO will be created with the same user and group as
-mpd is running as.  Default permissions can be modified by using the builtin
-shell command "umask".  If a FIFO already exists at the specified path it will
-be reused, and will \fBnot\fP be removed when mpd is stopped.  You can use the
-"mkfifo" command to create this, and then you may modify the permissions to
-your liking.
-.SH REQUIRED SHOUT OUTPUT PARAMETERS
-.TP
-.B name <name>
-This specifies not only the unique audio output name, but also the stream
-title.
-.TP
-.B host <hostname>
-This specifies the hostname of the icecast server to connect to.
-.TP
-.B port <port>
-This specifies the port of the icecast server to connect to.
-.TP
-.B mount <mountpoint>
-This specifies the icecast mountpoint to use.
-.TP
-.B password <password>
-This specifies the password to use when logging in to the icecast server.
-.TP
-.B quality <quality>
-This specifies the encoding quality to use.  The value must be between 0
-and 10.  Fractional values, such as 2.5, are permitted.  Either the quality or
-the bitrate parameter must be specified, but not both.  For Ogg, a
-higher quality number produces higher quality output.  For MP3, it's
-just the opposite, with lower numbers producing higher quality output.
-.TP
-.B bitrate <kbps>
-This specifies the bitrate to use for encoding.  Either the quality or the
-bitrate parameter must be specified, but not both.
-.TP
-.B format <sample_rate:bits:channels>
-This specifies the sample rate, bits per sample, and number of channels to use
-for encoding.
-.SH OPTIONAL SHOUT OUTPUT PARAMETERS
-.TP
-.B encoding <encoding>
-This specifies which output encoding to use.  Should be either "ogg"
-or "mp3",  "mp3" is needed for shoutcast streaming. The default is "ogg".
-.TP
-.B protocol <protocol>
-This specifies the protocol that wil be used to connect to the
-icecast/shoutcast server. The options are "shoutcast", "icecast1" and
-"icecast2". The default is "icecast2".
-.TP
-.B user <username>
-This specifies the username to use when logging in to the icecast server.  The
-default is "source".
-.TP
-.B public <yes or no>
-This specifies whether to request that the stream be listed in all public
-stream directories that the icecast server knows about.  The default is no.
-.TP
-.B timeout <seconds>
-This specifies the number of seconds to wait before giving up on trying to
-connect to the icecast server.  The default is 2 seconds.
-.TP
-.B description <description>
-This specifies a description of the stream.
-.TP
-.B genre <genre>
-This specifies the genre(s) of the stream.
 .SH FILES
 .TP
 .BI ~/.mpdconf

doc/mpdconf.example

@@ -1,5 +1,5 @@
-# An example configuration file for MPD
-# See the mpd.conf man page for a more detailed description of each parameter.
+# An example configuration file for MPD.
+# Read the user manual for documentation: http://www.musicpd.org/doc/user/
 
 
 # Files and directories #######################################################
@@ -103,15 +103,19 @@
 #
 #gapless_mp3_playback			"yes"
 #
+# Setting "restore_paused" to "yes" puts MPD into pause mode instead
+# of starting playback after startup.
+#
+#restore_paused "no"
+#
 # This setting enables MPD to create playlists in a format usable by other
 # music players.
 #
 #save_absolute_paths_in_playlists	"no"
 #
-# This setting defines a list of tag types that will be extracted during the 
-# audio file discovery process. Optionally, 'comment' can be added to this
-# list.
-#
+# This setting defines a list of tag types that will be extracted during the
+# audio file discovery process. The complete list of possible values can be
+# found in the mpd.conf man page.
 #metadata_to_use	"artist,album,title,track,name,genre,date,composer,performer,disc"
 #
 # This setting enables automatic update of MPD's database when files in 
@@ -171,6 +175,15 @@
 ###############################################################################
 
 
+# Database #######################################################################
+#
+
+#database {
+#       plugin "proxy"
+#       host "other.mpd.host"
+#       port "6600"
+#}
+
 # Input #######################################################################
 #
 
@@ -191,16 +204,12 @@ input {
 # blocks. Setting this block is optional, though the server will only attempt
 # autodetection for one sound card.
 #
-# See <http://mpd.wikia.com/wiki/Configuration#Audio_Outputs> for examples of 
-# other audio outputs.
-#
 # An example of an ALSA output:
 #
 #audio_output {
 #	type		"alsa"
 #	name		"My ALSA Device"
 ##	device		"hw:0,0"	# optional
-##	format		"44100:16:2"	# optional
 ##	mixer_type      "hardware"	# optional
 ##	mixer_device	"default"	# optional
 ##	mixer_control	"PCM"		# optional
@@ -213,7 +222,6 @@ input {
 #	type		"oss"
 #	name		"My OSS Device"
 ##	device		"/dev/dsp"	# optional
-##	format		"44100:16:2"	# optional
 ##	mixer_type      "hardware"	# optional
 ##	mixer_device	"/dev/mixer"	# optional
 ##	mixer_control	"PCM"		# optional
@@ -235,6 +243,7 @@ input {
 ##	protocol	"icecast2"		# optional
 ##	user		"source"		# optional
 ##	description	"My Stream Description"	# optional
+##	url		"http://example.com"	# optional
 ##	genre		"jazz"			# optional
 ##	public		"no"			# optional
 ##	timeout		"2"			# optional
@@ -276,6 +285,25 @@ input {
 ##	sink		"remote_server_sink"	# optional
 #}
 #
+# An example of a winmm output (Windows multimedia API).
+#
+#audio_output {
+#	type		"winmm"
+#	name		"My WinMM output"
+##	device		"Digital Audio (S/PDIF) (High Definition Audio Device)" # optional
+#		or
+##	device		"0"		# optional
+##	mixer_type	"hardware"	# optional
+#}
+#
+# An example of an openal output.
+#
+#audio_output {
+#	type		"openal"
+#	name		"My OpenAL output"
+##	device		"Digital Audio (S/PDIF) (High Definition Audio Device)" # optional
+#}
+#
 ## Example "pipe" output:
 #
 #audio_output {
@@ -297,12 +325,6 @@ input {
 #	mixer_type      "none"			# optional
 #}
 #
-# This setting will change all decoded audio to be converted to the specified
-# format before being passed to the audio outputs. By default, this setting is
-# disabled.
-#
-#audio_output_format		"44100:16:2"
-#
 # If MPD has been compiled with libsamplerate support, this setting specifies 
 # the sample rate converter to use.  Possible values can be found in the 
 # mpd.conf man page or the libsamplerate documentation. By default, this is
@@ -316,8 +338,11 @@ input {
 # Normalization automatic volume adjustments ##################################
 #
 # This setting specifies the type of ReplayGain to use. This setting can have
-# the argument "off", "album" or "track". See <http://www.replaygain.org>
-# for more details. This setting is off by default.
+# the argument "off", "album", "track" or "auto". "auto" is a special mode that
+# chooses between "track" and "album" depending on the current state of
+# random playback. If random playback is enabled then "track" mode is used.
+# See <http://www.replaygain.org> for more details about ReplayGain.
+# This setting is off by default.
 #
 #replaygain			"album"
 #
@@ -326,6 +351,20 @@ input {
 #
 #replaygain_preamp		"0"
 #
+# This setting sets the pre-amp used for files that do NOT have ReplayGain tags.
+# By default this setting is disabled.
+#
+#replaygain_missing_preamp	"0"
+#
+# This setting enables or disables ReplayGain limiting.
+# MPD calculates actual amplification based on the ReplayGain tags
+# and replaygain_preamp / replaygain_missing_preamp setting.
+# If replaygain_limit is enabled MPD will never amplify audio signal
+# above its original level. If replaygain_limit is disabled such amplification
+# might occur. By default this setting is enabled.
+#
+#replaygain_limit		"yes"
+#
 # This setting enables on-the-fly normalization volume adjustment. This will
 # result in the volume of all playing audio to be adjusted so the output has 
 # equal "loudness". This setting is disabled by default.
@@ -341,7 +380,7 @@ input {
 # this may have undesired effects. Don't change this if you don't know what you
 # are doing.
 #
-#audio_buffer_size		"2048"
+#audio_buffer_size		"4096"
 #
 # This setting controls the percentage of the buffer which is filled before 
 # beginning to play. Increasing this reduces the chance of audio file skipping, 
@@ -366,7 +405,6 @@ input {
 #
 ###############################################################################
 
-
 # Character Encoding ##########################################################
 #
 # If file or directory names do not display correctly for your locale then you 

doc/protocol.xml

@@ -59,7 +59,7 @@
       <para>
         All data between the client and the server is encoded in
         UTF-8. (Note: In UTF-8 all standard ansi characters, 0-127 are
-        the same as a standard ansi encoding.  Also, no ansi character
+        the same as in standard ansi encoding.  Also, no ansi character
         appears in any multi-byte characters.  So, you can use
         standard C functions like <function>strlen</function>, and
         <function>strcpy</function> just fine with UTF-8 encoded
@@ -203,6 +203,47 @@
     </section>
   </chapter>
 
+  <chapter>
+    <title>Recipes</title>
+
+    <section>
+      <title>Queuing</title>
+
+      <para>
+        Often, users run MPD with "<link
+        linkend="command_random">random</link>" enabled, but want to
+        be able to insert songs "before" the rest of the playlist.
+        That is commonly called "queuing".
+      </para>
+
+      <para>
+        MPD implements this by allowing the client to specify a
+        "priority" for each song in the playlist (commands <link
+        linkend="command_prio"><command>prio</command></link> and
+        <link
+        linkend="command_prioid"><command>prioid</command></link>).  A
+        higher priority means that the song is going to be played
+        before the other songs.
+      </para>
+
+      <para>
+        In "random" mode, MPD maintains an internal randomized
+        sequence of songs.  In this sequence, songs with a higher
+        priority come first, and all songs with the same priority are
+        shuffled (by default, all songs are shuffled, because all have
+        the same priority "0").  When you increase the priority of a
+        song, it is moved to the front of the sequence according to
+        its new priority, but always after the current one.  A song
+        that has been played already (it's "before" the current song
+        in that sequence) will only be scheduled for repeated playback
+        if its priority has become bigger than the priority of the
+        current song.  Decreasing the priority of a song will moved it
+        farther to the end of the sequence.  Changing the priority of
+        the current song has no effect on the sequence.
+      </para>
+    </section>
+  </chapter>
+
   <chapter>
     <title>Command reference</title>
 
@@ -318,6 +359,25 @@
                   <option>crossfade</option>, replay gain
                 </para>
               </listitem>
+              <listitem>
+                <para>
+                    <returnvalue>sticker</returnvalue>: the sticker database
+                    has been modified.
+                </para>
+              </listitem>
+              <listitem>
+                <para>
+                  <returnvalue>subscription</returnvalue>: a client
+                  has subscribed or unsubscribed to a channel
+                </para>
+              </listitem>
+              <listitem>
+                <para>
+                  <returnvalue>message</returnvalue>: a message was
+                  received on a channel this client is subscribed to;
+                  this event is only emitted when the queue is empty
+                </para>
+              </listitem>
             </itemizedlist>
             <para>
               While a client is waiting for <command>idle</command>
@@ -484,7 +544,7 @@
               </listitem>
               <listitem>
                 <para>
-                  <varname>updatings_db</varname>:
+                  <varname>updating_db</varname>:
                   <returnvalue>job id</returnvalue>
                 </para>
               </listitem>
@@ -677,7 +737,11 @@
               Sets the replay gain mode.  One of
               <parameter>off</parameter>,
               <parameter>track</parameter>,
-              <parameter>album</parameter>.
+              <parameter>album</parameter>,
+              <parameter>auto</parameter><footnote
+                        id="replay_gain_auto_since_0_16">
+                <simpara>added in MPD 0.16</simpara>
+              </footnote>.
             </para>
             <para>
               Changing the mode during playback may take several
@@ -704,6 +768,25 @@
             </para>
           </listitem>
         </varlistentry>
+        <varlistentry id="command_volume">
+          <term>
+            <cmdsynopsis>
+              <command>volume</command>
+              <arg choice="req"><replaceable>CHANGE</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Changes volume by amount <varname>CHANGE</varname>.
+            </para>
+            <note>
+              <para>
+                <command>volume</command> is deprecated, use
+                <command>setvol</command> instead.
+              </para>
+            </note>
+          </listitem>
+        </varlistentry>
       </variablelist>
     </section>
 
@@ -814,6 +897,23 @@
             </para>
           </listitem>
         </varlistentry>
+
+        <varlistentry id="command_seekcur">
+          <term>
+            <cmdsynopsis>
+              <command>seekcur</command>
+              <arg choice="req"><replaceable>TIME</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Seeks to the position <varname>TIME</varname> within the
+              current song.  If prefixed by '+' or '-', then the time
+              is relative to the current playing position.
+            </para>
+          </listitem>
+        </varlistentry>
+
         <varlistentry id="command_stop">
           <term>
             <cmdsynopsis>
@@ -1073,6 +1173,46 @@ OK
             </para>
           </listitem>
         </varlistentry>
+
+        <varlistentry id="command_prio">
+          <term>
+            <cmdsynopsis>
+              <command>prio</command>
+              <arg choice="req"><replaceable>PRIORITY</replaceable></arg>
+              <arg choice="req" rep="repeat"><replaceable>START:END</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Set the priority of the specified songs.  A higher
+              priority means that it will be played first when
+              "random" mode is enabled.
+            </para>
+
+            <para>
+              A priority is an integer between 0 and 255.  The default
+              priority of new songs is 0.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry id="command_prioid">
+          <term>
+            <cmdsynopsis>
+              <command>prioid</command>
+              <arg choice="req"><replaceable>PRIORITY</replaceable></arg>
+              <arg choice="req" rep="repeat"><replaceable>ID</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Same as <link
+              linkend="command_prio"><command>prio</command></link>,
+              but address the songs with their id.
+            </para>
+          </listitem>
+        </varlistentry>
+
         <varlistentry id="command_shuffle">
           <term>
             <cmdsynopsis>
@@ -1191,12 +1331,14 @@ OK
             <cmdsynopsis>
               <command>load</command>
               <arg choice="req"><replaceable>NAME</replaceable></arg>
+              <arg choice="opt"><replaceable>START:END</replaceable></arg>
             </cmdsynopsis>
           </term>
           <listitem>
             <para>
               Loads the playlist into the current queue.  Playlist
-              plugins are supported.
+              plugins are supported.  A range may be specified to load
+              only a part of the playlist.
             </para>
           </listitem>
         </varlistentry>
@@ -1341,9 +1483,13 @@ OK
             <para>
               Finds songs in the db that are exactly
               <varname>WHAT</varname>.  <varname>TYPE</varname> can
-              be any tag supported by MPD, or one of the two special
+              be any tag supported by MPD, or one of the three special
               parameters — <parameter>file</parameter> to search by
-              full path (relative to database root), and
+
+              full path (relative to the music directory),
+              <parameter>in</parameter> to restrict the search to
+              songs in the given directory (also relative to the music
+              directory) and
               <parameter>any</parameter> to match against all
               available tags.  <varname>WHAT</varname> is what to find.
             </para>
@@ -1433,6 +1579,37 @@ OK
               the list of stored playlists.  This behavior is
               deprecated; use "listplaylists" instead.
             </para>
+            <para>
+              Clients that are connected via UNIX domain socket may
+              use this command to read the tags of an arbitrary local
+              file (URI beginning with "file:///").
+            </para>
+          </listitem>
+        </varlistentry>
+        <varlistentry id="command_readcomments">
+          <term>
+            <cmdsynopsis>
+              <command>readcomments</command>
+              <arg><replaceable>URI</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Read "comments" (i.e. key-value pairs) from the file
+              specified by "URI".  This "URI" can be a path relative
+              to the music directory or a URL in the form
+              "file:///foo/bar.ogg".
+            </para>
+            <para>
+              The response consists of lines in the form "KEY: VALUE".
+              Comments with suspicious characters (e.g. newlines) are
+              ignored silently.
+            </para>
+            <para>
+              The meaning of these depends on the codec, and not all
+              decoder plugins support it.  For example, on Ogg files,
+              this lists the Vorbis comments.
+            </para>
           </listitem>
         </varlistentry>
         <varlistentry id="command_search">
@@ -1453,6 +1630,51 @@ OK
             </para>
           </listitem>
         </varlistentry>
+        <varlistentry id="command_searchadd">
+          <term>
+            <cmdsynopsis>
+              <command>searchadd</command>
+              <arg choice="req"><replaceable>TYPE</replaceable></arg>
+              <arg choice="req"><replaceable>WHAT</replaceable></arg>
+              <arg choice="opt"><replaceable>...</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Searches for any song that contains <varname>WHAT</varname>
+              in tag <varname>TYPE</varname> and adds them to current playlist.
+            </para>
+            <para>
+              Parameters have the same meaning as for <command>find</command>,
+              except that search is not case sensitive.
+            </para>
+          </listitem>
+        </varlistentry>
+        <varlistentry id="command_searchaddpl">
+          <term>
+            <cmdsynopsis>
+              <command>searchaddpl</command>
+              <arg choice="req"><replaceable>NAME</replaceable></arg>
+              <arg choice="req"><replaceable>TYPE</replaceable></arg>
+              <arg choice="req"><replaceable>WHAT</replaceable></arg>
+              <arg choice="opt"><replaceable>...</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Searches for any song that contains <varname>WHAT</varname>
+              in tag <varname>TYPE</varname> and adds them to the playlist
+              named <varname>NAME</varname>.
+            </para>
+            <para>
+              If a playlist by that name doesn't exist it is created.
+            </para>
+            <para>
+              Parameters have the same meaning as for <command>find</command>,
+              except that search is not case sensitive.
+            </para>
+          </listitem>
+        </varlistentry>
         <varlistentry id="command_update">
           <term>
             <cmdsynopsis>
@@ -1627,7 +1849,10 @@ OK
           </term>
           <listitem>
             <para>
-              Closes the connection to MPD.
+              Closes the connection to MPD.  MPD will try to send the
+              remaining output buffer before it actually closes the
+              connection, but that cannot be guaranteed.  This command
+              will not generate a response.
             </para>
           </listitem>
         </varlistentry>
@@ -1681,6 +1906,7 @@ OK
           <term>
             <cmdsynopsis>
               <command>disableoutput</command>
+              <arg choice="req"><replaceable>ID</replaceable></arg>
             </cmdsynopsis>
           </term>
           <listitem>
@@ -1693,6 +1919,7 @@ OK
           <term>
             <cmdsynopsis>
               <command>enableoutput</command>
+              <arg choice="req"><replaceable>ID</replaceable></arg>
             </cmdsynopsis>
           </term>
           <listitem>
@@ -1701,6 +1928,20 @@ OK
             </para>
           </listitem>
         </varlistentry>
+        <varlistentry id="command_toggleoutput">
+          <term>
+            <cmdsynopsis>
+              <command>toggleoutput</command>
+              <arg choice="req"><replaceable>ID</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Turns an output on or off, depending on the current
+              state.
+            </para>
+          </listitem>
+        </varlistentry>
         <varlistentry id="command_outputs">
           <term>
             <cmdsynopsis>
@@ -1720,6 +1961,47 @@ OK
       <title>Reflection</title>
 
       <variablelist>
+        <varlistentry id="command_config">
+          <term>
+            <cmdsynopsis>
+              <command>config</command>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Dumps configuration values that may be interesting for
+              the client.  This command is only permitted to "local"
+              clients (connected via UNIX domain socket).
+            </para>
+            <para>
+              The following response attributes are available:
+            </para>
+            <informaltable>
+              <tgroup cols="2">
+                <thead>
+                  <row>
+                    <entry>
+                      Name
+                    </entry>
+                    <entry>
+                      Description
+                    </entry>
+                  </row>
+                </thead>
+                <tbody>
+                  <row>
+                    <entry>
+                      <varname>music_directory</varname>
+                    </entry>
+                    <entry>
+                      The absolute path of the music directory.
+                    </entry>
+                  </row>
+                </tbody>
+              </tgroup>
+            </informaltable>
+          </listitem>
+        </varlistentry>
         <varlistentry id="command_commands">
           <term>
             <cmdsynopsis>
@@ -1790,5 +2072,105 @@ suffix: mpc</programlisting>
         </varlistentry>
       </variablelist>
     </section>
+
+    <section>
+      <title>Client to client</title>
+
+      <para>
+        Clients can communicate with each others over "channels".  A
+        channel is created by a client subscribing to it.  More than
+        one client can be subscribed to a channel at a time; all of
+        them will receive the messages which get sent to it.
+      </para>
+
+      <para>
+        Each time a client subscribes or unsubscribes, the global idle
+        event <varname>subscription</varname> is generated.  In
+        conjunction with the <command>channels</command> command, this
+        may be used to auto-detect clients providing additional
+        services.
+      </para>
+
+      <para>
+        New messages are indicated by the <varname>message</varname>
+        idle event.
+      </para>
+
+      <variablelist>
+        <varlistentry id="command_subscribe">
+          <term>
+            <cmdsynopsis>
+              <command>subscribe</command>
+              <arg choice="req"><replaceable>NAME</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Subscribe to a channel.  The channel is created if it
+              does not exist already.  The name may consist of
+              alphanumeric ASCII characters plus underscore, dash, dot
+              and colon.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry id="command_unsubscribe">
+          <term>
+            <cmdsynopsis>
+              <command>unsubscribe</command>
+              <arg choice="req"><replaceable>NAME</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Unsubscribe from a channel.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry id="command_channels">
+          <term>
+            <cmdsynopsis>
+              <command>channels</command>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Obtain a list of all channels.  The response is a list
+              of "channel:" lines.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry id="command_readmessages">
+          <term>
+            <cmdsynopsis>
+              <command>readmessages</command>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Reads messages for this client.  The response is a list
+              of "channel:" and "message:" lines.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry id="command_sendmessage">
+          <term>
+            <cmdsynopsis>
+              <command>sendmessage</command>
+              <arg choice="req"><replaceable>CHANNEL</replaceable></arg>
+              <arg choice="req"><replaceable>TEXT</replaceable></arg>
+            </cmdsynopsis>
+          </term>
+          <listitem>
+            <para>
+              Send a message to the specified channel.
+            </para>
+          </listitem>
+        </varlistentry>
+      </variablelist>
+    </section>
   </chapter>
 </book>

m4/ax_append_compile_flags.m4

@@ -0,0 +1,63 @@
+# ===========================================================================
+#  http://www.gnu.org/software/autoconf-archive/ax_append_compile_flags.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_APPEND_COMPILE_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS])
+#
+# DESCRIPTION
+#
+#   For every FLAG1, FLAG2 it is checked whether the compiler works with the
+#   flag.  If it does, the flag is added FLAGS-VARIABLE
+#
+#   If FLAGS-VARIABLE is not specified, the current language's flags (e.g.
+#   CFLAGS) is used.  During the check the flag is always added to the
+#   current language's flags.
+#
+#   If EXTRA-FLAGS is defined, it is added to the current language's default
+#   flags (e.g. CFLAGS) when the check is done.  The check is thus made with
+#   the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to
+#   force the compiler to issue an error when a bad flag is given.
+#
+#   NOTE: This macro depends on the AX_APPEND_FLAG and
+#   AX_CHECK_COMPILE_FLAG. Please keep this macro in sync with
+#   AX_APPEND_LINK_FLAGS.
+#
+# LICENSE
+#
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 2
+
+AC_DEFUN([AX_APPEND_COMPILE_FLAGS],
+[for flag in $1; do
+  AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [$2])], [], [$3])
+done
+])dnl AX_APPEND_COMPILE_FLAGS

m4/ax_append_flag.m4

@@ -0,0 +1,69 @@
+# ===========================================================================
+#      http://www.gnu.org/software/autoconf-archive/ax_append_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_APPEND_FLAG(FLAG, [FLAGS-VARIABLE])
+#
+# DESCRIPTION
+#
+#   FLAG is appended to the FLAGS-VARIABLE shell variable, with a space
+#   added in between.
+#
+#   If FLAGS-VARIABLE is not specified, the current language's flags (e.g.
+#   CFLAGS) is used.  FLAGS-VARIABLE is not changed if it already contains
+#   FLAG.  If FLAGS-VARIABLE is unset in the shell, it is set to exactly
+#   FLAG.
+#
+#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 2
+
+AC_DEFUN([AX_APPEND_FLAG],
+[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX
+AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])dnl
+AS_VAR_SET_IF(FLAGS,
+  [case " AS_VAR_GET(FLAGS) " in
+    *" $1 "*)
+      AC_RUN_LOG([: FLAGS already contains $1])
+      ;;
+    *)
+      AC_RUN_LOG([: FLAGS="$FLAGS $1"])
+      AS_VAR_SET(FLAGS, ["AS_VAR_GET(FLAGS) $1"])
+      ;;
+   esac],
+  [AS_VAR_SET(FLAGS,["$1"])])
+AS_VAR_POPDEF([FLAGS])dnl
+])dnl AX_APPEND_FLAG

m4/ax_append_link_flags.m4

@@ -0,0 +1,61 @@
+# ===========================================================================
+#   http://www.gnu.org/software/autoconf-archive/ax_append_link_flags.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_APPEND_LINK_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS])
+#
+# DESCRIPTION
+#
+#   For every FLAG1, FLAG2 it is checked whether the linker works with the
+#   flag.  If it does, the flag is added FLAGS-VARIABLE
+#
+#   If FLAGS-VARIABLE is not specified, the linker's flags (LDFLAGS) is
+#   used. During the check the flag is always added to the linker's flags.
+#
+#   If EXTRA-FLAGS is defined, it is added to the linker's default flags
+#   when the check is done.  The check is thus made with the flags: "LDFLAGS
+#   EXTRA-FLAGS FLAG".  This can for example be used to force the linker to
+#   issue an error when a bad flag is given.
+#
+#   NOTE: This macro depends on the AX_APPEND_FLAG and AX_CHECK_LINK_FLAG.
+#   Please keep this macro in sync with AX_APPEND_COMPILE_FLAGS.
+#
+# LICENSE
+#
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 2
+
+AC_DEFUN([AX_APPEND_LINK_FLAGS],
+[for flag in $1; do
+  AX_CHECK_LINK_FLAG([$flag], [AX_APPEND_FLAG([$flag], [m4_default([$2], [LDFLAGS])])], [], [$3])
+done
+])dnl AX_APPEND_LINK_FLAGS

m4/ax_check_compile_flag.m4

@@ -0,0 +1,72 @@
+# ===========================================================================
+#   http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS])
+#
+# DESCRIPTION
+#
+#   Check whether the given FLAG works with the current language's compiler
+#   or gives an error.  (Warnings, however, are ignored)
+#
+#   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
+#   success/failure.
+#
+#   If EXTRA-FLAGS is defined, it is added to the current language's default
+#   flags (e.g. CFLAGS) when the check is done.  The check is thus made with
+#   the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to
+#   force the compiler to issue an error when a bad flag is given.
+#
+#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
+#   macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 2
+
+AC_DEFUN([AX_CHECK_COMPILE_FLAG],
+[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX
+AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
+AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
+  ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
+  _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
+    [AS_VAR_SET(CACHEVAR,[yes])],
+    [AS_VAR_SET(CACHEVAR,[no])])
+  _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
+AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes],
+  [m4_default([$2], :)],
+  [m4_default([$3], :)])
+AS_VAR_POPDEF([CACHEVAR])dnl
+])dnl AX_CHECK_COMPILE_FLAGS

m4/ax_check_link_flag.m4

@@ -0,0 +1,71 @@
+# ===========================================================================
+#    http://www.gnu.org/software/autoconf-archive/ax_check_link_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_CHECK_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS])
+#
+# DESCRIPTION
+#
+#   Check whether the given FLAG works with the linker or gives an error.
+#   (Warnings, however, are ignored)
+#
+#   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
+#   success/failure.
+#
+#   If EXTRA-FLAGS is defined, it is added to the linker's default flags
+#   when the check is done.  The check is thus made with the flags: "LDFLAGS
+#   EXTRA-FLAGS FLAG".  This can for example be used to force the linker to
+#   issue an error when a bad flag is given.
+#
+#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
+#   macro in sync with AX_CHECK_{PREPROC,COMPILE}_FLAG.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 2
+
+AC_DEFUN([AX_CHECK_LINK_FLAG],
+[AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_ldflags_$4_$1])dnl
+AC_CACHE_CHECK([whether the linker accepts $1], CACHEVAR, [
+  ax_check_save_flags=$LDFLAGS
+  LDFLAGS="$LDFLAGS $4 $1"
+  AC_LINK_IFELSE([AC_LANG_PROGRAM()],
+    [AS_VAR_SET(CACHEVAR,[yes])],
+    [AS_VAR_SET(CACHEVAR,[no])])
+  LDFLAGS=$ax_check_save_flags])
+AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes],
+  [m4_default([$2], :)],
+  [m4_default([$3], :)])
+AS_VAR_POPDEF([CACHEVAR])dnl
+])dnl AX_CHECK_LINK_FLAGS

m4/ax_cxx_compile_stdcxx_0x.m4

@@ -0,0 +1,107 @@
+# ============================================================================
+#  http://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx_0x.html
+# ============================================================================
+#
+# SYNOPSIS
+#
+#   AX_CXX_COMPILE_STDCXX_0X
+#
+# DESCRIPTION
+#
+#   Check for baseline language coverage in the compiler for the C++0x
+#   standard.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 7
+
+AU_ALIAS([AC_CXX_COMPILE_STDCXX_0X], [AX_CXX_COMPILE_STDCXX_0X])
+AC_DEFUN([AX_CXX_COMPILE_STDCXX_0X], [
+  AC_CACHE_CHECK(if g++ supports C++0x features without additional flags,
+  ax_cv_cxx_compile_cxx0x_native,
+  [AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+  AC_TRY_COMPILE([
+  template <typename T>
+    struct check
+    {
+      static_assert(sizeof(int) <= sizeof(T), "not big enough");
+    };
+
+    typedef check<check<bool>> right_angle_brackets;
+
+    int a;
+    decltype(a) b;
+
+    typedef check<int> check_type;
+    check_type c;
+    check_type&& cr = static_cast<check_type&&>(c);],,
+  ax_cv_cxx_compile_cxx0x_native=yes, ax_cv_cxx_compile_cxx0x_native=no)
+  AC_LANG_RESTORE
+  ])
+
+  AC_CACHE_CHECK(if g++ supports C++0x features with -std=c++0x,
+  ax_cv_cxx_compile_cxx0x_cxx,
+  [AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -std=c++0x"
+  AC_TRY_COMPILE([
+  template <typename T>
+    struct check
+    {
+      static_assert(sizeof(int) <= sizeof(T), "not big enough");
+    };
+
+    typedef check<check<bool>> right_angle_brackets;
+
+    int a;
+    decltype(a) b;
+
+    typedef check<int> check_type;
+    check_type c;
+    check_type&& cr = static_cast<check_type&&>(c);],,
+  ax_cv_cxx_compile_cxx0x_cxx=yes, ax_cv_cxx_compile_cxx0x_cxx=no)
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  AC_LANG_RESTORE
+  ])
+
+  AC_CACHE_CHECK(if g++ supports C++0x features with -std=gnu++0x,
+  ax_cv_cxx_compile_cxx0x_gxx,
+  [AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -std=gnu++0x"
+  AC_TRY_COMPILE([
+  template <typename T>
+    struct check
+    {
+      static_assert(sizeof(int) <= sizeof(T), "not big enough");
+    };
+
+    typedef check<check<bool>> right_angle_brackets;
+
+    int a;
+    decltype(a) b;
+
+    typedef check<int> check_type;
+    check_type c;
+    check_type&& cr = static_cast<check_type&&>(c);],,
+  ax_cv_cxx_compile_cxx0x_gxx=yes, ax_cv_cxx_compile_cxx0x_gxx=no)
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  AC_LANG_RESTORE
+  ])
+
+  if test "$ax_cv_cxx_compile_cxx0x_native" = yes ||
+     test "$ax_cv_cxx_compile_cxx0x_cxx" = yes ||
+     test "$ax_cv_cxx_compile_cxx0x_gxx" = yes; then
+    AC_DEFINE(HAVE_STDCXX_0X,,[Define if g++ supports C++0x features. ])
+  fi
+])

m4/faad.m4

@@ -8,116 +8,51 @@ AC_ARG_ENABLE(aac,
 		[disable AAC support (default: enable)]),,
 	enable_aac=yes)
 
-AC_ARG_WITH(faad,
-	AS_HELP_STRING([--with-faad=PFX],
-		[prefix where faad2 is installed (optional)]),,
-	faad_prefix="")
-AC_ARG_WITH(faad-libraries,
-	AS_HELP_STRING([--with-faad-libraries=DIR],
-		[directory where faad2 library is installed (optional)]),,
-	faad_libraries="")
-AC_ARG_WITH(faad-includes,
-	AS_HELP_STRING([--with-faad-includes=DIR],
-		[directory where faad2 header files are installed (optional)]),,
-	faad_includes="")
-
 if test x$enable_aac = xyes; then
-	if test "x$faad_libraries" != "x" ; then
-		FAAD_LIBS="-L$faad_libraries"
-	elif test "x$faad_prefix" != "x" ; then
-		FAAD_LIBS="-L$faad_prefix/lib"
-	fi
-
-	FAAD_LIBS="$FAAD_LIBS -lfaad"
-
-	if test "x$faad_includes" != "x" ; then
-		FAAD_CFLAGS="-I$faad_includes"
-	elif test "x$faad_prefix" != "x" ; then
-		FAAD_CFLAGS="-I$faad_prefix/include"
-	fi
+	FAAD_LIBS="-lfaad"
+	FAAD_CFLAGS=""
 
 	oldcflags=$CFLAGS
 	oldlibs=$LIBS
 	oldcppflags=$CPPFLAGS
-	CFLAGS="$CFLAGS $MPD_CFLAGS $FAAD_CFLAGS -I."
-	LIBS="$LIBS $MPD_LIBS $FAAD_LIBS"
+	CFLAGS="$CFLAGS $FAAD_CFLAGS"
+	LIBS="$LIBS $FAAD_LIBS"
 	CPPFLAGS=$CFLAGS
 	AC_CHECK_HEADER(faad.h,,enable_aac=no)
 	if test x$enable_aac = xyes; then
 		AC_CHECK_DECL(FAAD2_VERSION,,enable_aac=no,[#include <faad.h>])
 	fi
 	if test x$enable_aac = xyes; then
-		AC_CHECK_DECL(faacDecInit2,,enable_aac=no,[#include <faad.h>])
+		AC_CHECK_LIB(faad,NeAACDecInit2,,enable_aac=no)
 	fi
 	if test x$enable_aac = xyes; then
-		AC_CHECK_LIB(faad,faacDecInit2,[MPD_LIBS="$MPD_LIBS $FAAD_LIBS";MPD_CFLAGS="$MPD_CFLAGS $FAAD_CFLAGS"],enable_aac=no)
-		if test x$enable_aac = xno; then
-			enable_aac=yes
-			AC_CHECK_LIB(faad,NeAACDecInit2,[MPD_LIBS="$MPD_LIBS $FAAD_LIBS";MPD_CFLAGS="$MPD_CFLAGS $FAAD_CFLAGS"],enable_aac=no)
-		fi
-	fi
-	if test x$enable_aac = xyes; then
-  		AC_MSG_CHECKING(that FAAD2 uses buffer and bufferlen)
-		AC_COMPILE_IFELSE([AC_LANG_SOURCE([
-#include <faad.h>
-
-int main() {
-	char buffer;
-	long bufferlen = 0;
-	faacDecHandle decoder;
-	faacDecFrameInfo frameInfo;
-	faacDecConfigurationPtr config;
-	unsigned char channels;
-	long sampleRate;
-        mp4AudioSpecificConfig mp4ASC;
-
-	decoder = faacDecOpen();
-	config = faacDecGetCurrentConfiguration(decoder);
-	config->outputFormat = FAAD_FMT_16BIT;
-	faacDecSetConfiguration(decoder,config);
-	AudioSpecificConfig(&buffer, bufferlen, &mp4ASC);
-	faacDecInit(decoder,&buffer,bufferlen,&sampleRate,&channels);
-	faacDecInit2(decoder,&buffer,bufferlen,&sampleRate,&channels);
-	faacDecDecode(decoder,&frameInfo,&buffer,bufferlen);
-
-	return 0;
-}
-])],[AC_MSG_RESULT(yes);AC_DEFINE(HAVE_FAAD_BUFLEN_FUNCS,1,[Define if FAAD2 uses buflen in function calls])],[AC_MSG_RESULT(no);
 		AC_MSG_CHECKING(that FAAD2 can even be used)
 		AC_COMPILE_IFELSE([AC_LANG_SOURCE([
 #include <faad.h>
 
 int main() {
 	char buffer;
-	faacDecHandle decoder;
-	faacDecFrameInfo frameInfo;
-	faacDecConfigurationPtr config;
+	NeAACDecHandle decoder;
+	NeAACDecFrameInfo frameInfo;
+	NeAACDecConfigurationPtr config;
 	unsigned char channels;
 	long sampleRate;
 	long bufferlen = 0;
-	unsigned long dummy1_32;
-        unsigned char dummy2_8, dummy3_8, dummy4_8, dummy5_8, dummy6_8,
-                                dummy7_8, dummy8_8;
 
-	decoder = faacDecOpen();
-	config = faacDecGetCurrentConfiguration(decoder);
+	decoder = NeAACDecOpen();
+	config = NeAACDecGetCurrentConfiguration(decoder);
 	config->outputFormat = FAAD_FMT_16BIT;
-	faacDecSetConfiguration(decoder,config);
-	AudioSpecificConfig(&buffer,&dummy1_32,&dummy2_8,
-                                &dummy3_8,&dummy4_8,&dummy5_8,
-                                &dummy6_8,&dummy7_8,&dummy8_8);
-	faacDecInit(decoder,&buffer,&sampleRate,&channels);
-	faacDecInit2(decoder,&buffer,bufferlen,&sampleRate,&channels);
-	faacDecDecode(decoder,&frameInfo,&buffer);
-	faacDecClose(decoder);
+	NeAACDecSetConfiguration(decoder,config);
+	NeAACDecInit(decoder,&buffer,bufferlen,&sampleRate,&channels);
+	NeAACDecInit2(decoder,&buffer,bufferlen,&sampleRate,&channels);
+	NeAACDecDecode(decoder,&frameInfo,&buffer,bufferlen);
+	NeAACDecClose(decoder);
 
 	return 0;
 }
 ])],AC_MSG_RESULT(yes),[AC_MSG_RESULT(no);enable_aac=no])
-		])
 	fi
 	if test x$enable_aac = xyes; then
-		AC_CHECK_MEMBERS([faacDecConfiguration.downMatrix,faacDecConfiguration.dontUpSampleImplicitSBR,faacDecFrameInfo.samplerate],,,[#include <faad.h>])
 		AC_DEFINE(HAVE_FAAD,1,[Define to use FAAD2 for AAC decoding])
 	else
 		AC_MSG_WARN([faad2 lib needed for MP4/AAC support -- disabling MP4/AAC support])
@@ -131,8 +66,8 @@ if test x$enable_aac = xyes; then
 	oldcflags=$CFLAGS
 	oldlibs=$LIBS
 	oldcppflags=$CPPFLAGS
-	CFLAGS="$CFLAGS $MPD_CFLAGS $FAAD_CFLAGS -Werror"
-	LIBS="$LIBS $MPD_LIBS $FAAD_LIBS"
+	CFLAGS="$CFLAGS $FAAD_CFLAGS -Werror"
+	LIBS="$LIBS $FAAD_LIBS"
 	CPPFLAGS=$CFLAGS
 
 	AC_MSG_CHECKING(for broken libfaad headers)
@@ -145,7 +80,7 @@ int main() {
 	unsigned char channels;
 	uint32_t sample_rate;
 
-	faacDecInit2(NULL, NULL, 0, &sample_rate, &channels);
+	NeAACDecInit2(NULL, NULL, 0, &sample_rate, &channels);
 	return 0;
 }
 	])],
@@ -153,40 +88,15 @@ int main() {
 		[AC_MSG_RESULT(broken);
 		AC_DEFINE(HAVE_FAAD_LONG, 1, [Define if faad.h uses the broken "unsigned long" pointers])])
 
-	CFLAGS=$oldcflags
-	LIBS=$oldlibs
-	CPPFLAGS=$oldcppflags
-fi
-
-if test x$enable_aac = xyes; then
-	enable_mp4=yes
-	MP4FF_LIBS="-lmp4ff"
-
-	oldcflags=$CFLAGS
-	oldlibs=$LIBS
-	oldcppflags=$CPPFLAGS
-	CFLAGS="$CFLAGS $FAAD_CFLAGS"
-	LIBS="$LIBS $FAAD_LIBS $MP4FF_LIBS"
-	CPPFLAGS=$CFLAGS
-
-	AC_CHECK_HEADER(mp4ff.h,,enable_mp4=no)
-
-	if test x$enable_mp4 = xyes; then
-		AC_CHECK_LIB(mp4ff,mp4ff_open_read,,enable_mp4=no)
-	fi
-
-	if test x$enable_mp4 = xyes; then
-		AC_SUBST(MP4FF_LIBS)
-		AC_DEFINE(HAVE_MP4, 1, [Define to use FAAD2+mp4ff for MP4 decoding])
-	else
-		AC_MSG_WARN([libmp4ff needed for MP4 support -- disabling MP4 support])
-		unset MP4FF_LIBS
-	fi
-
 	CFLAGS=$oldcflags
 	LIBS=$oldlibs
 	CPPFLAGS=$oldcppflags
 else
-	enable_mp4=no
+	FAAD_LIBS=""
+	FAAD_CFLAGS=""
 fi
+
+AC_SUBST(FAAD_CFLAGS)
+AC_SUBST(FAAD_LIBS)
+
 ])

m4/mpd_auto.m4

@@ -73,8 +73,26 @@ AC_DEFUN([MPD_AUTO_PKG_LIB], [
 			[eval "found_$1=yes"],
 			AC_CHECK_LIB($4, $5,
 				[eval "found_$1=yes $2_LIBS='$6' $2_CFLAGS='$7'"],
-				[eval "found_$1=no"]))
+				[eval "found_$1=no"],
+				[$6]))
 	fi
 
 	MPD_AUTO_RESULT([$1], [$8], [$9])
 ])
+
+dnl Wrapper for AC_CHECK_LIB.
+dnl
+dnl Parameters: varname1, varname2, libname, symname, libs, cflags, description, errmsg
+AC_DEFUN([MPD_AUTO_LIB], [
+	AC_SUBST([$2_LIBS], [])
+	AC_SUBST([$2_CFLAGS], [])
+
+	if eval "test x`echo '$'enable_$1` != xno"; then
+		AC_CHECK_LIB($3, $4,
+			[eval "found_$1=yes $2_LIBS='$5' $2_CFLAGS='$6'"],
+			[eval "found_$1=no"],
+			[$5])
+	fi
+
+	MPD_AUTO_RESULT([$1], [$7], [$8])
+])

m4/mpd_check_cflag.m4

@@ -1,18 +0,0 @@
-AC_DEFUN([MPD_CHECK_FLAG],[
-  var=`echo "$1" | tr "=-" "__"`
-  AC_CACHE_CHECK([whether the C compiler accepts $1],
-    [mpd_check_cflag_$var],[
-    save_CFLAGS="$CFLAGS"
-    CFLAGS="$CFLAGS $1"
-    AC_COMPILE_IFELSE([AC_LANG_SOURCE([
-     int main(void) { return 0; }
-     ])], [ eval "mpd_check_cflag_$var=yes"
-     ], [ eval "mpd_check_cflag_$var=no" ])
-    CFLAGS="$save_CFLAGS"
-  ])
-  if eval "test x`echo '$mpd_check_cflag_'$var` = xyes"
-  then
-    AM_CFLAGS="$AM_CFLAGS $1"
-  fi
-  ])
-])

m4/mpd_func.m4

@@ -0,0 +1,12 @@
+dnl MPD_OPTIONAL_FUNC(name, func, macro)
+dnl
+dnl Allow the user to enable or disable the use of a function.  If the
+dnl option is not specified, the function is auto-detected.
+AC_DEFUN([MPD_OPTIONAL_FUNC], [
+	AC_ARG_ENABLE([$1],
+		AS_HELP_STRING([--enable-$1],
+			[use the function "$1" (default: auto)]),
+		[test xenable_$1 = xyes && AC_DEFINE([$3], 1, [Define to use $1])],
+		[AC_CHECK_FUNC([$2],
+			[AC_DEFINE([$3], 1, [Define to use $1])],)])
+])

m4/ucred.m4

@@ -20,7 +20,7 @@ AC_DEFUN([STRUCT_UCRED],[
 				mpd_cv_have_struct_ucred=no)
 			if test x$mpd_cv_have_struct_ucred = xyes; then
 				# :(
-				MPD_CFLAGS="$MPD_CFLAGS -D_GNU_SOURCE"
+				CFLAGS="$CFLAGS -D_GNU_SOURCE"
 			fi
 		fi
 		])

mpd.service.in

@@ -1,6 +1,6 @@
 [Unit]
 Description=Music Player Daemon
-After=sound.target
+After=network.target sound.target
 
 [Service]
 ExecStart=@prefix@/bin/mpd --no-daemon

scripts/makedist.sh

@@ -1,25 +0,0 @@
-#!/bin/sh
-PWD=`pwd`
-
-## If we're not in the scripts directory
-## assume the base directory.
-if test "`basename $PWD`" = "scripts"; then
-	cd ../
-else
-	MYOLDPWD=`pwd`
-	cd `dirname $0`/../
-fi
-
-if test -e Makefile
-then
-	make distclean
-fi
-./autogen.sh
-make
-make dist
-
-if test "`basename $PWD`" = "scripts"; then
-	cd contrib/
-else
-	cd $MYOLDPWD
-fi

scripts/mpd-indent.sh

@@ -1,6 +0,0 @@
-#!/bin/sh
-indent -npro -kr -i8 -ts8 -sob -l80 -ss -ncs -cdw -cd0 -c0 -cp0 "$@"
-
-# there doesn't seem to be an indent switch for this, but this
-# forces goto labels to the left-most column, without indentation
-perl -i -p -e 's/^\s+(\w+):/$1:/g unless /^\s+default:/' "$@"

scripts/test.sh

@@ -1,93 +0,0 @@
-#!/bin/sh -e
-#
-# This shell script tests the build of MPD with various compile-time
-# options.
-#
-# Author: Max Kellermann <max@duempel.org>
-
-PREFIX=/tmp/mpd
-rm -rf $PREFIX
-
-test "x$MAKE" != x || MAKE=make
-
-export CFLAGS="-Os"
-
-test -x configure || NOCONFIGURE=1 ./autogen.sh
-
-# all features on
-./configure --prefix=$PREFIX/full \
-    --disable-dependency-tracking --enable-debug --enable-werror \
-    --enable-un \
-    --enable-modplug \
-    --enable-ao --enable-mikmod --enable-mvp
-$MAKE install
-$MAKE distclean
-
-# no UN, no oggvorbis, no flac, enable oggflac
-./configure --prefix=$PREFIX/small \
-    --disable-dependency-tracking --enable-debug --enable-werror \
-    --disable-un \
-    --disable-flac --disable-vorbis --enable-oggflac
-$MAKE install
-$MAKE distclean
-
-# strip down (disable TCP, disable nearly all plugins)
-CFLAGS="$CFLAGS -DNDEBUG" \
-./configure --prefix=$PREFIX/tiny \
-    --disable-dependency-tracking --disable-debug --enable-werror \
-    --disable-tcp \
-    --disable-curl \
-    --disable-id3 --disable-lsr \
-    --disable-ao --disable-alsa --disable-jack --disable-pulse --disable-fifo \
-    --disable-shout-ogg --disable-shout-mp3 --disable-lame-encoder \
-    --disable-ffmpeg --disable-wavpack --disable-mpc --disable-aac \
-    --disable-flac --disable-vorbis --disable-oggflac --disable-audiofile \
-    --disable-cue \
-    --with-zeroconf=no
-$MAKE install
-$MAKE distclean
-
-# shout: ogg without mp3
-# sndfile instead of modplug
-./configure --prefix=$PREFIX/shout_ogg \
-    --disable-dependency-tracking --disable-debug --enable-werror \
-    --disable-tcp \
-    --disable-curl \
-    --disable-id3 --disable-lsr \
-    --disable-ao --disable-alsa --disable-jack --disable-pulse --disable-fifo \
-    --enable-shout-ogg --disable-shout-mp3 --disable-lame-encoder \
-    --disable-ffmpeg --disable-wavpack --disable-mpc --disable-aac \
-    --disable-flac --enable-vorbis --disable-oggflac --disable-audiofile \
-    --disable-modplug --enable-sndfile \
-    --with-zeroconf=no
-$MAKE install
-$MAKE distclean
-
-# shout: mp3 without ogg
-./configure --prefix=$PREFIX/shout_mp3 \
-    --disable-dependency-tracking --disable-debug --enable-werror \
-    --disable-tcp \
-    --disable-curl \
-    --disable-id3 --disable-lsr \
-    --disable-ao --disable-alsa --disable-jack --disable-pulse --disable-fifo \
-    --disable-shout-ogg --enable-shout-mp3 --enable-lame-encoder \
-    --disable-ffmpeg --disable-wavpack --disable-mpc --disable-aac \
-    --disable-flac --disable-vorbis --disable-oggflac --disable-audiofile \
-    --with-zeroconf=no
-$MAKE install
-$MAKE distclean
-
-# oggvorbis + oggflac
-./configure --prefix=$PREFIX/oggvorbisflac \
-    --disable-dependency-tracking --disable-debug --enable-werror \
-    --disable-tcp \
-    --disable-curl \
-    --disable-id3 --disable-lsr \
-    --disable-mp3 \
-    --disable-ao --disable-alsa --disable-jack --disable-pulse --disable-fifo \
-    --disable-shout-ogg --disable-shout-mp3 --disable-lame-encoder \
-    --disable-ffmpeg --disable-wavpack --disable-mpc --disable-aac \
-    --disable-flac --enable-vorbis --enable-oggflac --disable-audiofile \
-    --with-zeroconf=no
-$MAKE install
-$MAKE distclean

src/ArchiveDomain.cxx

@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "ArchiveDomain.hxx"
+#include "util/Domain.hxx"
+
+const Domain archive_domain("archive");

src/ArchiveDomain.hxx

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_ARCHIVE_DOMAIN_HXX
+#define MPD_ARCHIVE_DOMAIN_HXX
+
+extern const class Domain archive_domain;
+
+#endif

src/ArchiveFile.hxx

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_ARCHIVE_FILE_HXX
+#define MPD_ARCHIVE_FILE_HXX
+
+class Mutex;
+class Cond;
+class Error;
+
+class ArchiveFile {
+public:
+	const struct archive_plugin &plugin;
+
+	ArchiveFile(const struct archive_plugin &_plugin)
+		:plugin(_plugin) {}
+
+protected:
+	/**
+	 * Use Close() instead of delete.
+	 */
+	~ArchiveFile() {}
+
+public:
+	virtual void Close() = 0;
+
+	/**
+	 * Visit all entries inside this archive.
+	 */
+	virtual void Visit(ArchiveVisitor &visitor) = 0;
+
+	/**
+	 * Opens an InputStream of a file within the archive.
+	 *
+	 * @param path the path within the archive
+	 */
+	virtual InputStream *OpenStream(const char *path,
+					Mutex &mutex, Cond &cond,
+					Error &error) = 0;
+};
+
+#endif

src/ArchiveList.cxx

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ArchiveList.hxx"
+#include "ArchivePlugin.hxx"
+#include "util/StringUtil.hxx"
+#include "archive/Bzip2ArchivePlugin.hxx"
+#include "archive/Iso9660ArchivePlugin.hxx"
+#include "archive/ZzipArchivePlugin.hxx"
+#include "util/Macros.hxx"
+
+#include <string.h>
+
+const struct archive_plugin *const archive_plugins[] = {
+#ifdef HAVE_BZ2
+	&bz2_archive_plugin,
+#endif
+#ifdef HAVE_ZZIP
+	&zzip_archive_plugin,
+#endif
+#ifdef HAVE_ISO9660
+	&iso9660_archive_plugin,
+#endif
+	nullptr
+};
+
+/** which plugins have been initialized successfully? */
+static bool archive_plugins_enabled[ARRAY_SIZE(archive_plugins) - 1];
+
+#define archive_plugins_for_each_enabled(plugin) \
+	archive_plugins_for_each(plugin) \
+		if (archive_plugins_enabled[archive_plugin_iterator - archive_plugins])
+
+const struct archive_plugin *
+archive_plugin_from_suffix(const char *suffix)
+{
+	if (suffix == nullptr)
+		return nullptr;
+
+	archive_plugins_for_each_enabled(plugin)
+		if (plugin->suffixes != nullptr &&
+		    string_array_contains(plugin->suffixes, suffix))
+			return plugin;
+
+	return nullptr;
+}
+
+const struct archive_plugin *
+archive_plugin_from_name(const char *name)
+{
+	archive_plugins_for_each_enabled(plugin)
+		if (strcmp(plugin->name, name) == 0)
+			return plugin;
+
+	return nullptr;
+}
+
+void archive_plugin_init_all(void)
+{
+	for (unsigned i = 0; archive_plugins[i] != nullptr; ++i) {
+		const struct archive_plugin *plugin = archive_plugins[i];
+		if (plugin->init == nullptr || archive_plugins[i]->init())
+			archive_plugins_enabled[i] = true;
+	}
+}
+
+void archive_plugin_deinit_all(void)
+{
+	archive_plugins_for_each_enabled(plugin)
+		if (plugin->finish != nullptr)
+			plugin->finish();
+}
+

src/ArchiveList.hxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -17,13 +17,19 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#ifndef MPD_ARCHIVE_LIST_H
-#define MPD_ARCHIVE_LIST_H
-
-#include <stdio.h>
+#ifndef MPD_ARCHIVE_LIST_HXX
+#define MPD_ARCHIVE_LIST_HXX
 
 struct archive_plugin;
 
+extern const struct archive_plugin *const archive_plugins[];
+
+#define archive_plugins_for_each(plugin) \
+	for (const struct archive_plugin *plugin, \
+		*const*archive_plugin_iterator = &archive_plugins[0]; \
+		(plugin = *archive_plugin_iterator) != nullptr; \
+		++archive_plugin_iterator)
+
 /* interface for using plugins */
 
 const struct archive_plugin *
@@ -32,8 +38,6 @@ archive_plugin_from_suffix(const char *suffix);
 const struct archive_plugin *
 archive_plugin_from_name(const char *name);
 
-void archive_plugin_print_all_suffixes(FILE * fp);
-
 /* this is where we "load" all the "plugins" ;-) */
 void archive_plugin_init_all(void);
 

src/ArchiveLookup.cxx

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h" /* must be first for large file support */
+#include "ArchiveLookup.hxx"
+#include "ArchiveDomain.hxx"
+#include "Log.hxx"
+
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+
+gcc_pure
+static char *
+FindSlash(char *p, size_t i)
+{
+	for (; i > 0; --i)
+		if (p[i] == '/')
+			return p + i;
+
+	return nullptr;
+}
+
+gcc_pure
+static const char *
+FindSuffix(const char *p, const char *i)
+{
+	for (; i > p; --i) {
+		if (*i == '.')
+			return i + 1;
+	}
+
+	return nullptr;
+}
+
+bool
+archive_lookup(char *pathname, const char **archive,
+	       const char **inpath, const char **suffix)
+{
+	size_t idx = strlen(pathname);
+
+	char *slash = nullptr;
+
+	while (true) {
+		//try to stat if its real directory
+		struct stat st_info;
+		if (stat(pathname, &st_info) == -1) {
+			if (errno != ENOTDIR) {
+				FormatErrno(archive_domain,
+					    "Failed to stat %s", pathname);
+				return false;
+			}
+		} else {
+			//is something found ins original path (is not an archive)
+			if (slash == nullptr)
+				return false;
+
+			//its a file ?
+			if (S_ISREG(st_info.st_mode)) {
+				//so the upper should be file
+				*archive = pathname;
+				*inpath = slash + 1;
+
+				//try to get suffix
+				*suffix = FindSuffix(pathname, slash - 1);
+				return true;
+			} else {
+				FormatError(archive_domain,
+					    "Not a regular file: %s",
+					    pathname);
+				return false;
+			}
+		}
+
+		//find one dir up
+		if (slash != nullptr)
+			*slash = '/';
+
+		slash = FindSlash(pathname, idx - 1);
+		if (slash == nullptr)
+			return false;
+
+		*slash = 0;
+		idx = slash - pathname;
+	}
+}
+

src/ArchiveLookup.hxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -17,17 +17,8 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h" /* must be first for large file support */
-#include "archive_api.h"
-
-#include <stdio.h>
-
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <errno.h>
-#include <glib.h>
+#ifndef MPD_ARCHIVE_LOOKUP_HXX
+#define MPD_ARCHIVE_LOOKUP_HXX
 
 /**
  *
@@ -46,66 +37,9 @@
  * inarchive pathname:		Talco - Combat Circus/12 - A la pachenka.mp3
  * and suffix:			 zip
  */
+bool
+archive_lookup(char *pathname, const char **archive,
+	       const char **inpath, const char **suffix);
 
-bool archive_lookup(char *pathname, char **archive, char **inpath, char **suffix)
-{
-	char *pathdupe;
-	int len, idx;
-	struct stat st_info;
-	bool ret = false;
-
-	*archive = NULL;
-	*inpath = NULL;
-	*suffix = NULL;
-
-	pathdupe = g_strdup(pathname);
-	len = idx = strlen(pathname);
-
-	while (idx > 0) {
-		//try to stat if its real directory
-		if (stat(pathdupe, &st_info) == -1) {
-			if (errno != ENOTDIR) {
-				g_warning("stat %s failed (errno=%d)\n", pathdupe, errno);
-				break;
-			}
-		} else {
-			//is something found ins original path (is not an archive)
-			if (idx == len) {
-				break;
-			}
-			//its a file ?
-			if (S_ISREG(st_info.st_mode)) {
-				//so the upper should be file
-				pathname[idx] = 0;
-				ret = true;
-				*archive = pathname;
-				*inpath = pathname + idx+1;
-
-				//try to get suffix
-				*suffix = NULL;
-				while (idx > 0) {
-					if (pathname[idx] == '.') {
-						*suffix = pathname + idx + 1;
-						break;
-					}
-					idx--;
-				}
-				break;
-			} else {
-				g_warning("not a regular file %s\n", pathdupe);
-				break;
-			}
-		}
-		//find one dir up
-		while (idx > 0) {
-			if (pathdupe[idx] == '/') {
-				pathdupe[idx] = 0;
-				break;
-			}
-			idx--;
-		}
-	}
-	g_free(pathdupe);
-	return ret;
-}
+#endif
 

src/ArchivePlugin.cxx

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ArchivePlugin.hxx"
+#include "ArchiveFile.hxx"
+#include "util/Error.hxx"
+
+#include <assert.h>
+
+ArchiveFile *
+archive_file_open(const struct archive_plugin *plugin, const char *path,
+		  Error &error)
+{
+	assert(plugin != nullptr);
+	assert(plugin->open != nullptr);
+	assert(path != nullptr);
+
+	ArchiveFile *file = plugin->open(path, error);
+	assert((file == nullptr) == error.IsDefined());
+
+	return file;
+}

src/ArchivePlugin.hxx

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_ARCHIVE_PLUGIN_HXX
+#define MPD_ARCHIVE_PLUGIN_HXX
+
+struct InputStream;
+class ArchiveFile;
+class ArchiveVisitor;
+class Error;
+
+struct archive_plugin {
+	const char *name;
+
+	/**
+	 * optional, set this to nullptr if the archive plugin doesn't
+	 * have/need one this must false if there is an error and
+	 * true otherwise
+	 */
+	bool (*init)(void);
+
+	/**
+	 * optional, set this to nullptr if the archive plugin doesn't
+	 * have/need one
+	 */
+	void (*finish)(void);
+
+	/**
+	 * tryes to open archive file and associates handle with archive
+	 * returns pointer to handle used is all operations with this archive
+	 * or nullptr when opening fails
+	 */
+	ArchiveFile *(*open)(const char *path_fs, Error &error);
+
+	/**
+	 * suffixes handled by this plugin.
+	 * last element in these arrays must always be a nullptr
+	 */
+	const char *const*suffixes;
+};
+
+ArchiveFile *
+archive_file_open(const struct archive_plugin *plugin, const char *path,
+		  Error &error);
+
+#endif

src/ArchiveVisitor.hxx

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_ARCHIVE_VISITOR_HXX
+#define MPD_ARCHIVE_VISITOR_HXX
+
+class ArchiveVisitor {
+public:
+	virtual void VisitArchiveEntry(const char *path_utf8) = 0;
+};
+
+#endif

src/AudioCompress/compress.c

@@ -33,6 +33,9 @@ struct Compressor {
 struct Compressor *Compressor_new(unsigned int history)
 {
 	struct Compressor *obj = malloc(sizeof(struct Compressor));
+	if (obj == NULL)
+		/* out of memory, not much we can do */
+		abort();
 
 	obj->prefs.target = TARGET;
 	obj->prefs.maxgain = GAINMAX;
@@ -61,6 +64,10 @@ void Compressor_delete(struct Compressor *obj)
 static int *resizeArray(int *data, int newsz, int oldsz)
 {
         data = realloc(data, newsz*sizeof(int));
+	if (data == NULL)
+		/* out of memory, not much we can do */
+		abort();
+
         if (newsz > oldsz)
                 memset(data + oldsz, 0, sizeof(int)*(newsz - oldsz));
         return data;

src/AudioCompress/compress.h

@@ -19,6 +19,10 @@ struct CompressorConfig {
 
 struct Compressor;
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 //! Create a new compressor (use history value of 0 for default)
 struct Compressor *Compressor_new(unsigned int history);
 
@@ -34,7 +38,12 @@ struct CompressorConfig *Compressor_getConfig(struct Compressor *);
 //! Process 16-bit signed data
 void Compressor_Process_int16(struct Compressor *, int16_t *data, unsigned int count);
 
+#ifdef __cplusplus
+}
+#endif
+
 //! TODO: Compressor_Process_int32, Compressor_Process_float, others as needed
 
 //! TODO: functions for getting at the peak/gain/clip history buffers (for monitoring)
+
 #endif

src/AudioConfig.cxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -18,42 +18,35 @@
  */
 
 #include "config.h"
-#include "audio.h"
-#include "audio_format.h"
-#include "audio_parser.h"
-#include "output_internal.h"
-#include "output_plugin.h"
-#include "output_all.h"
-#include "conf.h"
-#include "mpd_error.h"
+#include "AudioConfig.hxx"
+#include "AudioFormat.hxx"
+#include "AudioParser.hxx"
+#include "ConfigData.hxx"
+#include "ConfigGlobal.hxx"
+#include "ConfigOption.hxx"
+#include "util/Error.hxx"
+#include "system/FatalError.hxx"
 
-#include <glib.h>
+static AudioFormat configured_audio_format;
 
-#include <assert.h>
-#include <stdlib.h>
-
-static struct audio_format configured_audio_format;
-
-void getOutputAudioFormat(const struct audio_format *inAudioFormat,
-			  struct audio_format *outAudioFormat)
+AudioFormat
+getOutputAudioFormat(AudioFormat inAudioFormat)
 {
-	*outAudioFormat = *inAudioFormat;
-	audio_format_mask_apply(outAudioFormat, &configured_audio_format);
+	AudioFormat out_audio_format = inAudioFormat;
+	out_audio_format.ApplyMask(configured_audio_format);
+	return out_audio_format;
 }
 
 void initAudioConfig(void)
 {
 	const struct config_param *param = config_get_param(CONF_AUDIO_OUTPUT_FORMAT);
-	GError *error = NULL;
-	bool ret;
 
-	if (param == NULL)
+	if (param == nullptr)
 		return;
 
-	ret = audio_format_parse(&configured_audio_format, param->value,
-				 true, &error);
-	if (!ret)
-		MPD_ERROR("error parsing \"%s\" at line %i: %s",
-			  CONF_AUDIO_OUTPUT_FORMAT, param->line,
-			  error->message);
+	Error error;
+	if (!audio_format_parse(configured_audio_format, param->value.c_str(),
+				true, error))
+		FormatFatalError("error parsing line %i: %s",
+				 param->line, error.GetMessage());
 }

src/AudioConfig.hxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -17,15 +17,13 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#ifndef MPD_AUDIO_H
-#define MPD_AUDIO_H
+#ifndef MPD_AUDIO_CONFIG_HXX
+#define MPD_AUDIO_CONFIG_HXX
 
-#include <stdbool.h>
+struct AudioFormat;
 
-struct audio_format;
-
-void getOutputAudioFormat(const struct audio_format *inFormat,
-			  struct audio_format *outFormat);
+AudioFormat
+getOutputAudioFormat(AudioFormat inFormat);
 
 /* make sure initPlayerData is called before this function!! */
 void initAudioConfig(void);

src/AudioFormat.cxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -17,56 +17,69 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "audio_format.h"
+#include "AudioFormat.hxx"
 
 #include <assert.h>
 #include <stdio.h>
 
-#if G_BYTE_ORDER == G_BIG_ENDIAN
-#define REVERSE_ENDIAN_SUFFIX "_le"
-#else
-#define REVERSE_ENDIAN_SUFFIX "_be"
-#endif
+void
+AudioFormat::ApplyMask(AudioFormat mask)
+{
+	assert(IsValid());
+	assert(mask.IsMaskValid());
+
+	if (mask.sample_rate != 0)
+		sample_rate = mask.sample_rate;
+
+	if (mask.format != SampleFormat::UNDEFINED)
+		format = mask.format;
+
+	if (mask.channels != 0)
+		channels = mask.channels;
+
+	assert(IsValid());
+}
 
 const char *
-sample_format_to_string(enum sample_format format)
+sample_format_to_string(SampleFormat format)
 {
 	switch (format) {
-	case SAMPLE_FORMAT_UNDEFINED:
+	case SampleFormat::UNDEFINED:
 		return "?";
 
-	case SAMPLE_FORMAT_S8:
+	case SampleFormat::S8:
 		return "8";
 
-	case SAMPLE_FORMAT_S16:
+	case SampleFormat::S16:
 		return "16";
 
-	case SAMPLE_FORMAT_S24:
-		return "24_3";
-
-	case SAMPLE_FORMAT_S24_P32:
+	case SampleFormat::S24_P32:
 		return "24";
 
-	case SAMPLE_FORMAT_S32:
+	case SampleFormat::S32:
 		return "32";
+
+	case SampleFormat::FLOAT:
+		return "f";
+
+	case SampleFormat::DSD:
+		return "dsd";
 	}
 
 	/* unreachable */
 	assert(false);
-	return "?";
+	gcc_unreachable();
 }
 
 const char *
-audio_format_to_string(const struct audio_format *af,
+audio_format_to_string(const AudioFormat af,
 		       struct audio_format_string *s)
 {
-	assert(af != NULL);
-	assert(s != NULL);
+	assert(s != nullptr);
 
-	snprintf(s->buffer, sizeof(s->buffer), "%u:%s%s:%u",
-		 af->sample_rate, sample_format_to_string(af->format),
-		 af->reverse_endian ? REVERSE_ENDIAN_SUFFIX : "",
-		 af->channels);
+	snprintf(s->buffer, sizeof(s->buffer), "%u:%s:%u",
+		 af.sample_rate, sample_format_to_string(af.format),
+		 af.channels);
 
 	return s->buffer;
 }

src/AudioFormat.hxx

@@ -0,0 +1,315 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_AUDIO_FORMAT_HXX
+#define MPD_AUDIO_FORMAT_HXX
+
+#include "Compiler.h"
+
+#include <stdint.h>
+#include <assert.h>
+
+#if defined(WIN32) && GCC_CHECK_VERSION(4,6)
+/* on WIN32, "FLOAT" is already defined, and this triggers -Wshadow */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wshadow"
+#endif
+
+enum class SampleFormat : uint8_t {
+	UNDEFINED = 0,
+
+	S8,
+	S16,
+
+	/**
+	 * Signed 24 bit integer samples, packed in 32 bit integers
+	 * (the most significant byte is filled with the sign bit).
+	 */
+	S24_P32,
+
+	S32,
+
+	/**
+	 * 32 bit floating point samples in the host's format.  The
+	 * range is -1.0f to +1.0f.
+	 */
+	FLOAT,
+
+	/**
+	 * Direct Stream Digital.  1-bit samples; each frame has one
+	 * byte (8 samples) per channel.
+	 */
+	DSD,
+};
+
+#if defined(WIN32) && GCC_CHECK_VERSION(4,6)
+#pragma GCC diagnostic pop
+#endif
+
+static constexpr unsigned MAX_CHANNELS = 8;
+
+/**
+ * This structure describes the format of a raw PCM stream.
+ */
+struct AudioFormat {
+	/**
+	 * The sample rate in Hz.  A better name for this attribute is
+	 * "frame rate", because technically, you have two samples per
+	 * frame in stereo sound.
+	 */
+	uint32_t sample_rate;
+
+	/**
+	 * The format samples are stored in.  See the #sample_format
+	 * enum for valid values.
+	 */
+	SampleFormat format;
+
+	/**
+	 * The number of channels.  Only mono (1) and stereo (2) are
+	 * fully supported currently.
+	 */
+	uint8_t channels;
+
+	AudioFormat() = default;
+
+	constexpr AudioFormat(uint32_t _sample_rate,
+			      SampleFormat _format, uint8_t _channels)
+		:sample_rate(_sample_rate),
+		 format(_format), channels(_channels) {}
+
+	static constexpr AudioFormat Undefined() {
+		return AudioFormat(0, SampleFormat::UNDEFINED,0);
+	}
+
+	/**
+	 * Clears the #audio_format object, i.e. sets all attributes to an
+	 * undefined (invalid) value.
+	 */
+	void Clear() {
+		sample_rate = 0;
+		format = SampleFormat::UNDEFINED;
+		channels = 0;
+	}
+
+	/**
+	 * Checks whether the object has a defined value.
+	 */
+	constexpr bool IsDefined() const {
+		return sample_rate != 0;
+	}
+
+	/**
+	 * Checks whether the object is full, i.e. all attributes are
+	 * defined.  This is more complete than IsDefined(), but
+	 * slower.
+	 */
+	constexpr bool IsFullyDefined() const {
+		return sample_rate != 0 && format != SampleFormat::UNDEFINED &&
+			channels != 0;
+	}
+
+	/**
+	 * Checks whether the object has at least one defined value.
+	 */
+	constexpr bool IsMaskDefined() const {
+		return sample_rate != 0 || format != SampleFormat::UNDEFINED ||
+			channels != 0;
+	}
+
+	bool IsValid() const;
+	bool IsMaskValid() const;
+
+	constexpr bool operator==(const AudioFormat other) const {
+		return sample_rate == other.sample_rate &&
+			format == other.format &&
+			channels == other.channels;
+	}
+
+	constexpr bool operator!=(const AudioFormat other) const {
+		return !(*this == other);
+	}
+
+	void ApplyMask(AudioFormat mask);
+
+	/**
+	 * Returns the size of each (mono) sample in bytes.
+	 */
+	unsigned GetSampleSize() const;
+
+	/**
+	 * Returns the size of each full frame in bytes.
+	 */
+	unsigned GetFrameSize() const;
+
+	/**
+	 * Returns the floating point factor which converts a time
+	 * span to a storage size in bytes.
+	 */
+	double GetTimeToSize() const;
+};
+
+/**
+ * Buffer for audio_format_string().
+ */
+struct audio_format_string {
+	char buffer[24];
+};
+
+/**
+ * Checks whether the sample rate is valid.
+ *
+ * @param sample_rate the sample rate in Hz
+ */
+static constexpr inline bool
+audio_valid_sample_rate(unsigned sample_rate)
+{
+	return sample_rate > 0 && sample_rate < (1 << 30);
+}
+
+/**
+ * Checks whether the sample format is valid.
+ *
+ * @param bits the number of significant bits per sample
+ */
+static inline bool
+audio_valid_sample_format(SampleFormat format)
+{
+	switch (format) {
+	case SampleFormat::S8:
+	case SampleFormat::S16:
+	case SampleFormat::S24_P32:
+	case SampleFormat::S32:
+	case SampleFormat::FLOAT:
+	case SampleFormat::DSD:
+		return true;
+
+	case SampleFormat::UNDEFINED:
+		break;
+	}
+
+	return false;
+}
+
+/**
+ * Checks whether the number of channels is valid.
+ */
+static constexpr inline bool
+audio_valid_channel_count(unsigned channels)
+{
+	return channels >= 1 && channels <= MAX_CHANNELS;
+}
+
+/**
+ * Returns false if the format is not valid for playback with MPD.
+ * This function performs some basic validity checks.
+ */
+inline bool
+AudioFormat::IsValid() const
+{
+	return audio_valid_sample_rate(sample_rate) &&
+		audio_valid_sample_format(format) &&
+		audio_valid_channel_count(channels);
+}
+
+/**
+ * Returns false if the format mask is not valid for playback with
+ * MPD.  This function performs some basic validity checks.
+ */
+inline bool
+AudioFormat::IsMaskValid() const
+{
+	return (sample_rate == 0 ||
+		audio_valid_sample_rate(sample_rate)) &&
+		(format == SampleFormat::UNDEFINED ||
+		 audio_valid_sample_format(format)) &&
+		(channels == 0 || audio_valid_channel_count(channels));
+}
+
+gcc_const
+static inline unsigned
+sample_format_size(SampleFormat format)
+{
+	switch (format) {
+	case SampleFormat::S8:
+		return 1;
+
+	case SampleFormat::S16:
+		return 2;
+
+	case SampleFormat::S24_P32:
+	case SampleFormat::S32:
+	case SampleFormat::FLOAT:
+		return 4;
+
+	case SampleFormat::DSD:
+		/* each frame has 8 samples per channel */
+		return 1;
+
+	case SampleFormat::UNDEFINED:
+		return 0;
+	}
+
+	assert(false);
+	gcc_unreachable();
+}
+
+inline unsigned
+AudioFormat::GetSampleSize() const
+{
+	return sample_format_size(format);
+}
+
+inline unsigned
+AudioFormat::GetFrameSize() const
+{
+	return GetSampleSize() * channels;
+}
+
+inline double
+AudioFormat::GetTimeToSize() const
+{
+	return sample_rate * GetFrameSize();
+}
+
+/**
+ * Renders a #sample_format enum into a string, e.g. for printing it
+ * in a log file.
+ *
+ * @param format a #sample_format enum value
+ * @return the string
+ */
+gcc_pure gcc_malloc
+const char *
+sample_format_to_string(SampleFormat format);
+
+/**
+ * Renders the #audio_format object into a string, e.g. for printing
+ * it in a log file.
+ *
+ * @param af the #audio_format object
+ * @param s a buffer to print into
+ * @return the string, or nullptr if the #audio_format object is invalid
+ */
+gcc_pure gcc_malloc
+const char *
+audio_format_to_string(AudioFormat af,
+		       struct audio_format_string *s);
+
+#endif

src/AudioParser.cxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -23,26 +23,19 @@
  */
 
 #include "config.h"
-#include "audio_parser.h"
-#include "audio_format.h"
-#include "audio_check.h"
+#include "AudioParser.hxx"
+#include "AudioFormat.hxx"
+#include "CheckAudioFormat.hxx"
+#include "util/Error.hxx"
+#include "Compiler.h"
 
 #include <assert.h>
 #include <string.h>
 #include <stdlib.h>
 
-/**
- * The GLib quark used for errors reported by this library.
- */
-static inline GQuark
-audio_parser_quark(void)
-{
-	return g_quark_from_static_string("audio_parser");
-}
-
 static bool
 parse_sample_rate(const char *src, bool mask, uint32_t *sample_rate_r,
-		  const char **endptr_r, GError **error_r)
+		  const char **endptr_r, Error &error)
 {
 	unsigned long value;
 	char *endptr;
@@ -55,10 +48,10 @@ parse_sample_rate(const char *src, bool mask, uint32_t *sample_rate_r,
 
 	value = strtoul(src, &endptr, 10);
 	if (endptr == src) {
-		g_set_error(error_r, audio_parser_quark(), 0,
-			    "Failed to parse the sample rate");
+		error.Set(audio_format_domain,
+			  "Failed to parse the sample rate");
 		return false;
-	} else if (!audio_check_sample_rate(value, error_r))
+	} else if (!audio_check_sample_rate(value, error))
 		return false;
 
 	*sample_rate_r = value;
@@ -68,50 +61,62 @@ parse_sample_rate(const char *src, bool mask, uint32_t *sample_rate_r,
 
 static bool
 parse_sample_format(const char *src, bool mask,
-		    enum sample_format *sample_format_r,
-		    const char **endptr_r, GError **error_r)
+		    SampleFormat *sample_format_r,
+		    const char **endptr_r, Error &error)
 {
 	unsigned long value;
 	char *endptr;
-	enum sample_format sample_format;
+	SampleFormat sample_format;
 
 	if (mask && *src == '*') {
-		*sample_format_r = SAMPLE_FORMAT_UNDEFINED;
+		*sample_format_r = SampleFormat::UNDEFINED;
 		*endptr_r = src + 1;
 		return true;
 	}
 
+	if (*src == 'f') {
+		*sample_format_r = SampleFormat::FLOAT;
+		*endptr_r = src + 1;
+		return true;
+	}
+
+	if (memcmp(src, "dsd", 3) == 0) {
+		*sample_format_r = SampleFormat::DSD;
+		*endptr_r = src + 3;
+		return true;
+	}
+
 	value = strtoul(src, &endptr, 10);
 	if (endptr == src) {
-		g_set_error(error_r, audio_parser_quark(), 0,
-			    "Failed to parse the sample format");
+		error.Set(audio_format_domain,
+			  "Failed to parse the sample format");
 		return false;
 	}
 
 	switch (value) {
 	case 8:
-		sample_format = SAMPLE_FORMAT_S8;
+		sample_format = SampleFormat::S8;
 		break;
 
 	case 16:
-		sample_format = SAMPLE_FORMAT_S16;
+		sample_format = SampleFormat::S16;
 		break;
 
 	case 24:
-		if (memcmp(endptr, "_3", 2) == 0) {
-			sample_format = SAMPLE_FORMAT_S24;
+		if (memcmp(endptr, "_3", 2) == 0)
+			/* for backwards compatibility */
 			endptr += 2;
-		} else
-			sample_format = SAMPLE_FORMAT_S24_P32;
+
+		sample_format = SampleFormat::S24_P32;
 		break;
 
 	case 32:
-		sample_format = SAMPLE_FORMAT_S32;
+		sample_format = SampleFormat::S32;
 		break;
 
 	default:
-		g_set_error(error_r, audio_parser_quark(), 0,
-			    "Invalid sample format: %lu", value);
+		error.Format(audio_format_domain,
+			     "Invalid sample format: %lu", value);
 		return false;
 	}
 
@@ -124,7 +129,7 @@ parse_sample_format(const char *src, bool mask,
 
 static bool
 parse_channel_count(const char *src, bool mask, uint8_t *channels_r,
-		    const char **endptr_r, GError **error_r)
+		    const char **endptr_r, Error &error)
 {
 	unsigned long value;
 	char *endptr;
@@ -137,10 +142,10 @@ parse_channel_count(const char *src, bool mask, uint8_t *channels_r,
 
 	value = strtoul(src, &endptr, 10);
 	if (endptr == src) {
-		g_set_error(error_r, audio_parser_quark(), 0,
-			    "Failed to parse the channel count");
+		error.Set(audio_format_domain,
+			  "Failed to parse the channel count");
 		return false;
-	} else if (!audio_check_channel_count(value, error_r))
+	} else if (!audio_check_channel_count(value, error))
 		return false;
 
 	*channels_r = value;
@@ -149,51 +154,60 @@ parse_channel_count(const char *src, bool mask, uint8_t *channels_r,
 }
 
 bool
-audio_format_parse(struct audio_format *dest, const char *src,
-		   bool mask, GError **error_r)
+audio_format_parse(AudioFormat &dest, const char *src,
+		   bool mask, Error &error)
 {
 	uint32_t rate;
-	enum sample_format sample_format;
+	SampleFormat sample_format;
 	uint8_t channels;
 
-	audio_format_clear(dest);
+	dest.Clear();
 
 	/* parse sample rate */
 
-	if (!parse_sample_rate(src, mask, &rate, &src, error_r))
+#if GCC_CHECK_VERSION(4,7)
+	/* workaround -Wmaybe-uninitialized false positive */
+	rate = 0;
+#endif
+
+	if (!parse_sample_rate(src, mask, &rate, &src, error))
 		return false;
 
 	if (*src++ != ':') {
-		g_set_error(error_r, audio_parser_quark(), 0,
-			    "Sample format missing");
+		error.Set(audio_format_domain, "Sample format missing");
 		return false;
 	}
 
 	/* parse sample format */
 
-	if (!parse_sample_format(src, mask, &sample_format, &src, error_r))
+#if GCC_CHECK_VERSION(4,7)
+	/* workaround -Wmaybe-uninitialized false positive */
+	sample_format = SampleFormat::UNDEFINED;
+#endif
+
+	if (!parse_sample_format(src, mask, &sample_format, &src, error))
 		return false;
 
 	if (*src++ != ':') {
-		g_set_error(error_r, audio_parser_quark(), 0,
-			    "Channel count missing");
+		error.Set(audio_format_domain, "Channel count missing");
 		return false;
 	}
 
 	/* parse channel count */
 
-	if (!parse_channel_count(src, mask, &channels, &src, error_r))
+	if (!parse_channel_count(src, mask, &channels, &src, error))
 		return false;
 
 	if (*src != 0) {
-		g_set_error(error_r, audio_parser_quark(), 0,
+		error.Format(audio_format_domain,
 			    "Extra data after channel count: %s", src);
 		return false;
 	}
 
-	audio_format_init(dest, rate, sample_format, channels);
-	assert(mask ? audio_format_mask_valid(dest)
-	       : audio_format_valid(dest));
+	dest = AudioFormat(rate, sample_format, channels);
+	assert(mask
+	       ? dest.IsMaskValid()
+	       : dest.IsValid());
 
 	return true;
 }

src/AudioParser.hxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -22,14 +22,11 @@
  * Parser functions for audio related objects.
  */
 
-#ifndef AUDIO_PARSER_H
-#define AUDIO_PARSER_H
+#ifndef MPD_AUDIO_PARSER_HXX
+#define MPD_AUDIO_PARSER_HXX
 
-#include <glib.h>
-
-#include <stdbool.h>
-
-struct audio_format;
+struct AudioFormat;
+class Error;
 
 /**
  * Parses a string in the form "SAMPLE_RATE:BITS:CHANNELS" into an
@@ -38,12 +35,12 @@ struct audio_format;
  * @param dest the destination #audio_format struct
  * @param src the input string
  * @param mask if true, then "*" is allowed for any number of items
- * @param error_r location to store the error occuring, or NULL to
+ * @param error_r location to store the error occurring, or NULL to
  * ignore errors
  * @return true on success
  */
 bool
-audio_format_parse(struct audio_format *dest, const char *src,
-		   bool mask, GError **error_r);
+audio_format_parse(AudioFormat &dest, const char *src,
+		   bool mask, Error &error);
 
 #endif

src/AvahiPoll.cxx

@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "AvahiPoll.hxx"
+#include "event/Loop.hxx"
+#include "event/SocketMonitor.hxx"
+#include "event/TimeoutMonitor.hxx"
+
+static unsigned
+FromAvahiWatchEvent(AvahiWatchEvent e)
+{
+	return (e & AVAHI_WATCH_IN ? SocketMonitor::READ : 0) |
+		(e & AVAHI_WATCH_OUT ? SocketMonitor::WRITE : 0) |
+		(e & AVAHI_WATCH_ERR ? SocketMonitor::ERROR : 0) |
+		(e & AVAHI_WATCH_HUP ? SocketMonitor::HANGUP : 0);
+}
+
+static AvahiWatchEvent
+ToAvahiWatchEvent(unsigned e)
+{
+	return AvahiWatchEvent((e & SocketMonitor::READ ? AVAHI_WATCH_IN : 0) |
+			       (e & SocketMonitor::WRITE ? AVAHI_WATCH_OUT : 0) |
+			       (e & SocketMonitor::ERROR ? AVAHI_WATCH_ERR : 0) |
+			       (e & SocketMonitor::HANGUP ? AVAHI_WATCH_HUP : 0));
+}
+
+struct AvahiWatch final : private SocketMonitor {
+private:
+	const AvahiWatchCallback callback;
+	void *const userdata;
+
+	AvahiWatchEvent received;
+
+public:
+	AvahiWatch(int _fd, AvahiWatchEvent _event,
+		   AvahiWatchCallback _callback, void *_userdata,
+		   EventLoop &_loop)
+		:SocketMonitor(_fd, _loop),
+		 callback(_callback), userdata(_userdata),
+		 received(AvahiWatchEvent(0)) {
+		Schedule(FromAvahiWatchEvent(_event));
+	}
+
+	~AvahiWatch() {
+		Steal();
+	}
+
+	static void WatchUpdate(AvahiWatch *w, AvahiWatchEvent event) {
+		w->Schedule(FromAvahiWatchEvent(event));
+	}
+
+	static AvahiWatchEvent WatchGetEvents(AvahiWatch *w) {
+		return w->received;
+	}
+
+	static void WatchFree(AvahiWatch *w) {
+		delete w;
+	}
+
+protected:
+	virtual bool OnSocketReady(unsigned flags) {
+		received = ToAvahiWatchEvent(flags);
+		callback(this, Get(), received, userdata);
+		received = AvahiWatchEvent(0);
+		return true;
+	}
+};
+
+static constexpr unsigned
+TimevalToMS(const timeval &tv)
+{
+	return tv.tv_sec * 1000 + (tv.tv_usec + 500) / 1000;
+}
+
+struct AvahiTimeout final : private TimeoutMonitor {
+private:
+	const AvahiTimeoutCallback callback;
+	void *const userdata;
+
+public:
+	AvahiTimeout(const struct timeval *tv,
+		     AvahiTimeoutCallback _callback, void *_userdata,
+		     EventLoop &_loop)
+		:TimeoutMonitor(_loop),
+		 callback(_callback), userdata(_userdata) {
+		if (tv != nullptr)
+			Schedule(TimevalToMS(*tv));
+	}
+
+	static void TimeoutUpdate(AvahiTimeout *t, const struct timeval *tv) {
+		if (tv != nullptr)
+			t->Schedule(TimevalToMS(*tv));
+		else
+			t->Cancel();
+	}
+
+	static void TimeoutFree(AvahiTimeout *t) {
+		delete t;
+	}
+
+protected:
+	virtual void OnTimeout() {
+		callback(this, userdata);
+	}
+};
+
+MyAvahiPoll::MyAvahiPoll(EventLoop &_loop):event_loop(_loop)
+{
+	watch_new = WatchNew;
+	watch_update = AvahiWatch::WatchUpdate;
+	watch_get_events = AvahiWatch::WatchGetEvents;
+	watch_free = AvahiWatch::WatchFree;
+	timeout_new = TimeoutNew;
+	timeout_update = AvahiTimeout::TimeoutUpdate;
+	timeout_free = AvahiTimeout::TimeoutFree;
+}
+
+AvahiWatch *
+MyAvahiPoll::WatchNew(const AvahiPoll *api, int fd, AvahiWatchEvent event,
+		      AvahiWatchCallback callback, void *userdata) {
+	const MyAvahiPoll &poll = *(const MyAvahiPoll *)api;
+
+	return new AvahiWatch(fd, event, callback, userdata,
+			      poll.event_loop);
+}
+
+AvahiTimeout *
+MyAvahiPoll::TimeoutNew(const AvahiPoll *api, const struct timeval *tv,
+			AvahiTimeoutCallback callback, void *userdata) {
+	const MyAvahiPoll &poll = *(const MyAvahiPoll *)api;
+
+	return new AvahiTimeout(tv, callback, userdata,
+				poll.event_loop);
+}

src/AvahiPoll.hxx

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_AVAHI_POLL_HXX
+#define MPD_AVAHI_POLL_HXX
+
+#include "check.h"
+#include "Compiler.h"
+
+#include <avahi-common/watch.h>
+
+class EventLoop;
+
+class MyAvahiPoll final : public AvahiPoll {
+	EventLoop &event_loop;
+
+public:
+	MyAvahiPoll(EventLoop &_loop);
+
+private:
+	static AvahiWatch *WatchNew(const AvahiPoll *api, int fd,
+				    AvahiWatchEvent event,
+				    AvahiWatchCallback callback,
+				    void *userdata);
+
+	static AvahiTimeout *TimeoutNew(const AvahiPoll *api,
+					const struct timeval *tv,
+					AvahiTimeoutCallback callback,
+					void *userdata);
+};
+
+#endif

src/CheckAudioFormat.cxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -17,17 +17,22 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "audio_check.h"
-#include "audio_format.h"
+#include "config.h"
+#include "CheckAudioFormat.hxx"
+#include "AudioFormat.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
 
 #include <assert.h>
 
+const Domain audio_format_domain("audio_format");
+
 bool
-audio_check_sample_rate(unsigned long sample_rate, GError **error_r)
+audio_check_sample_rate(unsigned long sample_rate, Error &error)
 {
 	if (!audio_valid_sample_rate(sample_rate)) {
-		g_set_error(error_r, audio_format_quark(), 0,
-			    "Invalid sample rate: %lu", sample_rate);
+		error.Format(audio_format_domain,
+			     "Invalid sample rate: %lu", sample_rate);
 		return false;
 	}
 
@@ -35,11 +40,12 @@ audio_check_sample_rate(unsigned long sample_rate, GError **error_r)
 }
 
 bool
-audio_check_sample_format(enum sample_format sample_format, GError **error_r)
+audio_check_sample_format(SampleFormat sample_format, Error &error)
 {
 	if (!audio_valid_sample_format(sample_format)) {
-		g_set_error(error_r, audio_format_quark(), 0,
-			    "Invalid sample format: %u", sample_format);
+		error.Format(audio_format_domain,
+			     "Invalid sample format: %u",
+			     unsigned(sample_format));
 		return false;
 	}
 
@@ -47,11 +53,11 @@ audio_check_sample_format(enum sample_format sample_format, GError **error_r)
 }
 
 bool
-audio_check_channel_count(unsigned channels, GError **error_r)
+audio_check_channel_count(unsigned channels, Error &error)
 {
 	if (!audio_valid_channel_count(channels)) {
-		g_set_error(error_r, audio_format_quark(), 0,
-			    "Invalid channel count: %u", channels);
+		error.Format(audio_format_domain,
+			     "Invalid channel count: %u", channels);
 		return false;
 	}
 
@@ -59,15 +65,15 @@ audio_check_channel_count(unsigned channels, GError **error_r)
 }
 
 bool
-audio_format_init_checked(struct audio_format *af, unsigned long sample_rate,
-			  enum sample_format sample_format, unsigned channels,
-			  GError **error_r)
+audio_format_init_checked(AudioFormat &af, unsigned long sample_rate,
+			  SampleFormat sample_format, unsigned channels,
+			  Error &error)
 {
-	if (audio_check_sample_rate(sample_rate, error_r) &&
-	    audio_check_sample_format(sample_format, error_r) &&
-	    audio_check_channel_count(channels, error_r)) {
-		audio_format_init(af, sample_rate, sample_format, channels);
-		assert(audio_format_valid(af));
+	if (audio_check_sample_rate(sample_rate, error) &&
+	    audio_check_sample_format(sample_format, error) &&
+	    audio_check_channel_count(channels, error)) {
+		af = AudioFormat(sample_rate, sample_format, channels);
+		assert(af.IsValid());
 		return true;
 	} else
 		return false;

src/CheckAudioFormat.hxx

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CHECK_AUDIO_FORMAT_HXX
+#define MPD_CHECK_AUDIO_FORMAT_HXX
+
+#include "AudioFormat.hxx"
+
+class Error;
+
+extern const class Domain audio_format_domain;
+
+bool
+audio_check_sample_rate(unsigned long sample_rate, Error &error);
+
+bool
+audio_check_sample_format(SampleFormat sample_format, Error &error);
+
+bool
+audio_check_channel_count(unsigned sample_format, Error &error);
+
+/**
+ * Wrapper for audio_format_init(), which checks all attributes.
+ */
+bool
+audio_format_init_checked(AudioFormat &af, unsigned long sample_rate,
+			  SampleFormat sample_format, unsigned channels,
+			  Error &error);
+
+#endif

src/Client.cxx

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ClientInternal.hxx"
+#include "util/Domain.hxx"
+
+const Domain client_domain("client");

src/Client.hxx

@@ -0,0 +1,187 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CLIENT_H
+#define MPD_CLIENT_H
+
+#include "check.h"
+#include "ClientMessage.hxx"
+#include "command/CommandListBuilder.hxx"
+#include "event/FullyBufferedSocket.hxx"
+#include "event/TimeoutMonitor.hxx"
+#include "Compiler.h"
+
+#include <set>
+#include <string>
+#include <list>
+
+#include <stddef.h>
+#include <stdarg.h>
+
+struct sockaddr;
+class EventLoop;
+struct Partition;
+
+class Client final : private FullyBufferedSocket, TimeoutMonitor {
+public:
+	Partition &partition;
+	struct playlist &playlist;
+	struct PlayerControl &player_control;
+
+	unsigned permission;
+
+	/** the uid of the client process, or -1 if unknown */
+	int uid;
+
+	CommandListBuilder cmd_list;
+
+	unsigned int num;	/* client number */
+
+	/** is this client waiting for an "idle" response? */
+	bool idle_waiting;
+
+	/** idle flags pending on this client, to be sent as soon as
+	    the client enters "idle" */
+	unsigned idle_flags;
+
+	/** idle flags that the client wants to receive */
+	unsigned idle_subscriptions;
+
+	/**
+	 * A list of channel names this client is subscribed to.
+	 */
+	std::set<std::string> subscriptions;
+
+	/**
+	 * The number of subscriptions in #subscriptions.  Used to
+	 * limit the number of subscriptions.
+	 */
+	unsigned num_subscriptions;
+
+	/**
+	 * A list of messages this client has received.
+	 */
+	std::list<ClientMessage> messages;
+
+	Client(EventLoop &loop, Partition &partition,
+	       int fd, int uid, int num);
+
+	bool IsConnected() const {
+		return FullyBufferedSocket::IsDefined();
+	}
+
+	gcc_pure
+	bool IsExpired() const {
+		return !FullyBufferedSocket::IsDefined();
+	}
+
+	void Close();
+	void SetExpired();
+
+	using FullyBufferedSocket::Write;
+
+	/**
+	 * returns the uid of the client process, or a negative value
+	 * if the uid is unknown
+	 */
+	int GetUID() const {
+		return uid;
+	}
+
+	/**
+	 * Is this client running on the same machine, connected with
+	 * a local (UNIX domain) socket?
+	 */
+	bool IsLocal() const {
+		return uid > 0;
+	}
+
+	unsigned GetPermission() const {
+		return permission;
+	}
+
+	void SetPermission(unsigned _permission) {
+		permission = _permission;
+	}
+
+	/**
+	 * Send "idle" response to this client.
+	 */
+	void IdleNotify();
+	void IdleAdd(unsigned flags);
+	bool IdleWait(unsigned flags);
+
+	enum class SubscribeResult {
+		/** success */
+		OK,
+
+		/** invalid channel name */
+		INVALID,
+
+		/** already subscribed to this channel */
+		ALREADY,
+
+		/** too many subscriptions */
+		FULL,
+	};
+
+	gcc_pure
+	bool IsSubscribed(const char *channel_name) const {
+		return subscriptions.find(channel_name) != subscriptions.end();
+	}
+
+	SubscribeResult Subscribe(const char *channel);
+	bool Unsubscribe(const char *channel);
+	void UnsubscribeAll();
+	bool PushMessage(const ClientMessage &msg);
+
+private:
+	/* virtual methods from class BufferedSocket */
+	virtual InputResult OnSocketInput(void *data, size_t length) override;
+	virtual void OnSocketError(Error &&error) override;
+	virtual void OnSocketClosed() override;
+
+	/* virtual methods from class TimeoutMonitor */
+	virtual void OnTimeout() override;
+};
+
+void client_manager_init(void);
+
+void
+client_new(EventLoop &loop, Partition &partition,
+	   int fd, const struct sockaddr *sa, size_t sa_length, int uid);
+
+/**
+ * Write a C string to the client.
+ */
+void client_puts(Client &client, const char *s);
+
+/**
+ * Write a printf-like formatted string to the client.
+ */
+void client_vprintf(Client &client, const char *fmt, va_list args);
+
+/**
+ * Write a printf-like formatted string to the client.
+ */
+gcc_printf(2,3)
+void
+client_printf(Client &client, const char *fmt, ...);
+
+#endif

src/ClientEvent.cxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -18,16 +18,20 @@
  */
 
 #include "config.h"
-#include "mixer_api.h"
-
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN "mixer"
+#include "ClientInternal.hxx"
+#include "util/Error.hxx"
+#include "Log.hxx"
 
 void
-mixer_init(struct mixer *mixer, const struct mixer_plugin *plugin)
+Client::OnSocketError(Error &&error)
 {
-	mixer->plugin = plugin;
-	mixer->mutex = g_mutex_new();
-	mixer->open = false;
-	mixer->failed = false;
+	FormatError(error, "error on client %d", num);
+
+	SetExpired();
+}
+
+void
+Client::OnSocketClosed()
+{
+	SetExpired();
 }

src/ClientExpire.cxx

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ClientInternal.hxx"
+#include "Log.hxx"
+
+void
+Client::SetExpired()
+{
+	if (IsExpired())
+		return;
+
+	FullyBufferedSocket::Close();
+	TimeoutMonitor::Schedule(0);
+}
+
+void
+Client::OnTimeout()
+{
+	if (!IsExpired()) {
+		assert(!idle_waiting);
+		FormatDebug(client_domain, "[%u] timeout", num);
+	}
+
+	Close();
+}

src/ClientFile.cxx

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ClientFile.hxx"
+#include "Client.hxx"
+#include "protocol/Ack.hxx"
+#include "fs/Path.hxx"
+#include "fs/FileSystem.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <unistd.h>
+
+bool
+client_allow_file(const Client &client, Path path_fs, Error &error)
+{
+#ifdef WIN32
+	(void)client;
+	(void)path_fs;
+
+	error.Set(ack_domain, ACK_ERROR_PERMISSION, "Access denied");
+	return false;
+#else
+	const int uid = client.GetUID();
+	if (uid >= 0 && (uid_t)uid == geteuid())
+		/* always allow access if user runs his own MPD
+		   instance */
+		return true;
+
+	if (uid <= 0) {
+		/* unauthenticated client */
+		error.Set(ack_domain, ACK_ERROR_PERMISSION, "Access denied");
+		return false;
+	}
+
+	struct stat st;
+	if (!StatFile(path_fs, st)) {
+		error.SetErrno();
+		return false;
+	}
+
+	if (st.st_uid != (uid_t)uid && (st.st_mode & 0444) != 0444) {
+		/* client is not owner */
+		error.Set(ack_domain, ACK_ERROR_PERMISSION, "Access denied");
+		return false;
+	}
+
+	return true;
+#endif
+}

src/ClientFile.hxx

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CLIENT_FILE_HXX
+#define MPD_CLIENT_FILE_HXX
+
+class Client;
+class Path;
+class Error;
+
+/**
+ * Is this client allowed to use the specified local file?
+ *
+ * Note that this function is vulnerable to timing/symlink attacks.
+ * We cannot fix this as long as there are plugins that open a file by
+ * its name, and not by file descriptor / callbacks.
+ *
+ * @param path_fs the absolute path name in filesystem encoding
+ * @return true if access is allowed
+ */
+bool
+client_allow_file(const Client &client, Path path_fs, Error &error);
+
+#endif

src/ClientGlobal.cxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -18,18 +18,14 @@
  */
 
 #include "config.h"
-#include "client_internal.h"
-#include "conf.h"
-
-#include <assert.h>
+#include "ClientInternal.hxx"
+#include "ClientList.hxx"
+#include "ConfigGlobal.hxx"
 
 #define CLIENT_TIMEOUT_DEFAULT			(60)
-#define CLIENT_MAX_CONNECTIONS_DEFAULT		(10)
 #define CLIENT_MAX_COMMAND_LIST_DEFAULT		(2048*1024)
 #define CLIENT_MAX_OUTPUT_BUFFER_SIZE_DEFAULT	(8192*1024)
 
-/* set this to zero to indicate we have no possible clients */
-unsigned int client_max_connections;
 int client_timeout;
 size_t client_max_command_list_size;
 size_t client_max_output_buffer_size;
@@ -38,9 +34,6 @@ void client_manager_init(void)
 {
 	client_timeout = config_get_positive(CONF_CONN_TIMEOUT,
 					     CLIENT_TIMEOUT_DEFAULT);
-	client_max_connections =
-		config_get_positive(CONF_MAX_CONN,
-				    CLIENT_MAX_CONNECTIONS_DEFAULT);
 	client_max_command_list_size =
 		config_get_positive(CONF_MAX_COMMAND_LIST_SIZE,
 				    CLIENT_MAX_COMMAND_LIST_DEFAULT / 1024)
@@ -51,23 +44,3 @@ void client_manager_init(void)
 				    CLIENT_MAX_OUTPUT_BUFFER_SIZE_DEFAULT / 1024)
 		* 1024;
 }
-
-static void client_close_all(void)
-{
-	while (!client_list_is_empty()) {
-		struct client *client = client_list_get_first();
-
-		client_close(client);
-	}
-
-	assert(client_list_is_empty());
-}
-
-void client_manager_deinit(void)
-{
-	client_close_all();
-
-	client_max_connections = 0;
-
-	client_deinit_expire();
-}

src/ClientIdle.cxx

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ClientInternal.hxx"
+#include "Idle.hxx"
+
+#include <assert.h>
+
+void
+Client::IdleNotify()
+{
+	assert(idle_waiting);
+	assert(idle_flags != 0);
+
+	unsigned flags = idle_flags;
+	idle_flags = 0;
+	idle_waiting = false;
+
+	const char *const*idle_names = idle_get_names();
+	for (unsigned i = 0; idle_names[i]; ++i) {
+		if (flags & (1 << i) & idle_subscriptions)
+			client_printf(*this, "changed: %s\n",
+				      idle_names[i]);
+	}
+
+	client_puts(*this, "OK\n");
+
+	TimeoutMonitor::ScheduleSeconds(client_timeout);
+}
+
+void
+Client::IdleAdd(unsigned flags)
+{
+	if (IsExpired())
+		return;
+
+	idle_flags |= flags;
+	if (idle_waiting && (idle_flags & idle_subscriptions))
+		IdleNotify();
+}
+
+bool
+Client::IdleWait(unsigned flags)
+{
+	assert(!idle_waiting);
+
+	idle_waiting = true;
+	idle_subscriptions = flags;
+
+	if (idle_flags & idle_subscriptions) {
+		IdleNotify();
+		return true;
+	} else {
+		/* disable timeouts while in "idle" */
+		TimeoutMonitor::Cancel();
+		return false;
+	}
+}

src/ClientInternal.hxx

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CLIENT_INTERNAL_HXX
+#define MPD_CLIENT_INTERNAL_HXX
+
+#include "check.h"
+#include "Client.hxx"
+#include "command/CommandResult.hxx"
+
+static constexpr unsigned CLIENT_MAX_SUBSCRIPTIONS = 16;
+static constexpr unsigned CLIENT_MAX_MESSAGES = 64;
+
+extern const class Domain client_domain;
+
+extern int client_timeout;
+extern size_t client_max_command_list_size;
+extern size_t client_max_output_buffer_size;
+
+CommandResult
+client_process_line(Client &client, char *line);
+
+#endif

src/ClientList.cxx

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ClientList.hxx"
+#include "ClientInternal.hxx"
+
+#include <algorithm>
+
+#include <assert.h>
+
+void
+ClientList::Remove(Client &client)
+{
+	assert(size > 0);
+	assert(!list.empty());
+
+	auto i = std::find(list.begin(), list.end(), &client);
+	assert(i != list.end());
+	list.erase(i);
+	--size;
+}
+
+void
+ClientList::CloseAll()
+{
+	while (!list.empty())
+		list.front()->Close();
+
+	assert(size == 0);
+}
+
+void
+ClientList::IdleAdd(unsigned flags)
+{
+	assert(flags != 0);
+
+	for (const auto &client : list)
+		client->IdleAdd(flags);
+}

src/ClientList.hxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -17,38 +17,48 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#ifndef MPD_STATS_H
-#define MPD_STATS_H
+#ifndef MPD_CLIENT_LIST_HXX
+#define MPD_CLIENT_LIST_HXX
 
-#include <glib.h>
+#include <list>
 
-struct client;
+class Client;
 
-struct stats {
-	GTimer *timer;
+class ClientList {
+	const unsigned max_size;
 
-	/** number of song files in the music directory */
-	unsigned song_count;
+	unsigned size;
+	std::list<Client *> list;
 
-	/** sum of all song durations in the music directory (in
-	    seconds) */
-	unsigned long song_duration;
+public:
+	ClientList(unsigned _max_size)
+		:max_size(_max_size), size(0) {}
+	~ClientList() {
+		CloseAll();
+	}
 
-	/** number of distinct artist names in the music directory */
-	unsigned artist_count;
+	std::list<Client *>::iterator begin() {
+		return list.begin();
+	}
 
-	/** number of distinct album names in the music directory */
-	unsigned album_count;
+	std::list<Client *>::iterator end() {
+		return list.end();
+	}
+
+	bool IsFull() const {
+		return size >= max_size;
+	}
+
+	void Add(Client &client) {
+		list.push_front(&client);
+		++size;
+	}
+
+	void Remove(Client &client);
+
+	void CloseAll();
+
+	void IdleAdd(unsigned flags);
 };
 
-extern struct stats stats;
-
-void stats_global_init(void);
-
-void stats_global_finish(void);
-
-void stats_update(void);
-
-int stats_print(struct client *client);
-
 #endif

src/ClientMessage.cxx

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "ClientMessage.hxx"
+#include "util/CharUtil.hxx"
+#include "Compiler.h"
+
+gcc_const
+static bool
+valid_channel_char(const char ch)
+{
+	return IsAlphaNumericASCII(ch) ||
+		ch == '_' || ch == '-' || ch == '.' || ch == ':';
+}
+
+bool
+client_message_valid_channel_name(const char *name)
+{
+	do {
+		if (!valid_channel_char(*name))
+			return false;
+	} while (*++name != 0);
+
+	return true;
+}

src/ClientMessage.hxx

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CLIENT_MESSAGE_H
+#define MPD_CLIENT_MESSAGE_H
+
+#include "Compiler.h"
+
+#include <string>
+
+/**
+ * A client-to-client message.
+ */
+class ClientMessage {
+	std::string channel, message;
+
+public:
+	template<typename T, typename U>
+	ClientMessage(T &&_channel, U &&_message)
+		:channel(std::forward<T>(_channel)),
+		 message(std::forward<U>(_message)) {}
+
+	const char *GetChannel() const {
+		return channel.c_str();
+	}
+
+	const char *GetMessage() const {
+		return message.c_str();
+	}
+};
+
+gcc_pure
+bool
+client_message_valid_channel_name(const char *name);
+
+#endif

src/ClientNew.cxx

@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ClientInternal.hxx"
+#include "ClientList.hxx"
+#include "Partition.hxx"
+#include "Instance.hxx"
+#include "system/fd_util.h"
+#include "system/Resolver.hxx"
+#include "Permission.hxx"
+#include "util/Error.hxx"
+#include "Log.hxx"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <sys/types.h>
+#ifdef WIN32
+#include <winsock2.h>
+#else
+#include <sys/socket.h>
+#endif
+#include <unistd.h>
+
+#ifdef HAVE_LIBWRAP
+#include <tcpd.h>
+#endif
+
+static const char GREETING[] = "OK MPD " PROTOCOL_VERSION "\n";
+
+Client::Client(EventLoop &_loop, Partition &_partition,
+	       int _fd, int _uid, int _num)
+	:FullyBufferedSocket(_fd, _loop, 16384, client_max_output_buffer_size),
+	 TimeoutMonitor(_loop),
+	 partition(_partition),
+	 playlist(partition.playlist), player_control(partition.pc),
+	 permission(getDefaultPermissions()),
+	 uid(_uid),
+	 num(_num),
+	 idle_waiting(false), idle_flags(0),
+	 num_subscriptions(0)
+{
+	TimeoutMonitor::ScheduleSeconds(client_timeout);
+}
+
+void
+client_new(EventLoop &loop, Partition &partition,
+	   int fd, const struct sockaddr *sa, size_t sa_length, int uid)
+{
+	static unsigned int next_client_num;
+	char *remote;
+
+	assert(fd >= 0);
+
+#ifdef HAVE_LIBWRAP
+	if (sa->sa_family != AF_UNIX) {
+		char *hostaddr = sockaddr_to_string(sa, sa_length,
+						    IgnoreError());
+		const char *progname = g_get_prgname();
+
+		struct request_info req;
+		request_init(&req, RQ_FILE, fd, RQ_DAEMON, progname, 0);
+
+		fromhost(&req);
+
+		if (!hosts_access(&req)) {
+			/* tcp wrappers says no */
+			FormatWarning(client_domain,
+				      "libwrap refused connection (libwrap=%s) from %s",
+				      progname, hostaddr);
+
+			g_free(hostaddr);
+			close_socket(fd);
+			return;
+		}
+
+		g_free(hostaddr);
+	}
+#endif	/* HAVE_WRAP */
+
+	ClientList &client_list = *partition.instance.client_list;
+	if (client_list.IsFull()) {
+		LogWarning(client_domain, "Max connections reached");
+		close_socket(fd);
+		return;
+	}
+
+	Client *client = new Client(loop, partition, fd, uid,
+				    next_client_num++);
+
+	(void)send(fd, GREETING, sizeof(GREETING) - 1, 0);
+
+	client_list.Add(*client);
+
+	remote = sockaddr_to_string(sa, sa_length, IgnoreError());
+	FormatInfo(client_domain, "[%u] opened from %s", client->num, remote);
+	g_free(remote);
+}
+
+void
+Client::Close()
+{
+	partition.instance.client_list->Remove(*this);
+
+	SetExpired();
+
+	FormatInfo(client_domain, "[%u] closed", num);
+	delete this;
+}

src/ClientProcess.cxx

@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ClientInternal.hxx"
+#include "protocol/Result.hxx"
+#include "command/AllCommands.hxx"
+#include "Log.hxx"
+
+#include <string.h>
+
+#define CLIENT_LIST_MODE_BEGIN "command_list_begin"
+#define CLIENT_LIST_OK_MODE_BEGIN "command_list_ok_begin"
+#define CLIENT_LIST_MODE_END "command_list_end"
+
+static CommandResult
+client_process_command_list(Client &client, bool list_ok,
+			    std::list<std::string> &&list)
+{
+	CommandResult ret = CommandResult::OK;
+	unsigned num = 0;
+
+	for (auto &&i : list) {
+		char *cmd = &*i.begin();
+
+		FormatDebug(client_domain, "process command \"%s\"", cmd);
+		ret = command_process(client, num++, cmd);
+		FormatDebug(client_domain, "command returned %i", ret);
+		if (ret != CommandResult::OK || client.IsExpired())
+			break;
+		else if (list_ok)
+			client_puts(client, "list_OK\n");
+	}
+
+	return ret;
+}
+
+CommandResult
+client_process_line(Client &client, char *line)
+{
+	CommandResult ret;
+
+	if (strcmp(line, "noidle") == 0) {
+		if (client.idle_waiting) {
+			/* send empty idle response and leave idle mode */
+			client.idle_waiting = false;
+			command_success(client);
+		}
+
+		/* do nothing if the client wasn't idling: the client
+		   has already received the full idle response from
+		   client_idle_notify(), which he can now evaluate */
+
+		return CommandResult::OK;
+	} else if (client.idle_waiting) {
+		/* during idle mode, clients must not send anything
+		   except "noidle" */
+		FormatWarning(client_domain,
+			      "[%u] command \"%s\" during idle",
+			      client.num, line);
+		return CommandResult::CLOSE;
+	}
+
+	if (client.cmd_list.IsActive()) {
+		if (strcmp(line, CLIENT_LIST_MODE_END) == 0) {
+			FormatDebug(client_domain,
+				    "[%u] process command list",
+				    client.num);
+
+			auto &&cmd_list = client.cmd_list.Commit();
+
+			ret = client_process_command_list(client,
+							  client.cmd_list.IsOKMode(),
+							  std::move(cmd_list));
+			FormatDebug(client_domain,
+				    "[%u] process command "
+				    "list returned %i", client.num, ret);
+
+			if (ret == CommandResult::CLOSE ||
+			    client.IsExpired())
+				return CommandResult::CLOSE;
+
+			if (ret == CommandResult::OK)
+				command_success(client);
+
+			client.cmd_list.Reset();
+		} else {
+			if (!client.cmd_list.Add(line)) {
+				FormatWarning(client_domain,
+					      "[%u] command list size "
+					      "is larger than the max (%lu)",
+					      client.num,
+					      (unsigned long)client_max_command_list_size);
+				return CommandResult::CLOSE;
+			}
+
+			ret = CommandResult::OK;
+		}
+	} else {
+		if (strcmp(line, CLIENT_LIST_MODE_BEGIN) == 0) {
+			client.cmd_list.Begin(false);
+			ret = CommandResult::OK;
+		} else if (strcmp(line, CLIENT_LIST_OK_MODE_BEGIN) == 0) {
+			client.cmd_list.Begin(true);
+			ret = CommandResult::OK;
+		} else {
+			FormatDebug(client_domain,
+				    "[%u] process command \"%s\"",
+				    client.num, line);
+			ret = command_process(client, 0, line);
+			FormatDebug(client_domain,
+				    "[%u] command returned %i",
+				    client.num, ret);
+
+			if (ret == CommandResult::CLOSE ||
+			    client.IsExpired())
+				return CommandResult::CLOSE;
+
+			if (ret == CommandResult::OK)
+				command_success(client);
+		}
+	}
+
+	return ret;
+}

src/ClientRead.cxx

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ClientInternal.hxx"
+#include "Main.hxx"
+#include "event/Loop.hxx"
+#include "util/CharUtil.hxx"
+
+#include <assert.h>
+#include <string.h>
+
+BufferedSocket::InputResult
+Client::OnSocketInput(void *data, size_t length)
+{
+	char *p = (char *)data;
+	char *newline = (char *)memchr(p, '\n', length);
+	if (newline == nullptr)
+		return InputResult::MORE;
+
+	TimeoutMonitor::ScheduleSeconds(client_timeout);
+
+	BufferedSocket::ConsumeInput(newline + 1 - p);
+
+	/* skip whitespace at the end of the line */
+	while (newline > p && IsWhitespaceOrNull(newline[-1]))
+		--newline;
+
+	/* terminate the string at the end of the line */
+	*newline = 0;
+
+	CommandResult result = client_process_line(*this, p);
+	switch (result) {
+	case CommandResult::OK:
+	case CommandResult::IDLE:
+	case CommandResult::ERROR:
+		break;
+
+	case CommandResult::KILL:
+		Close();
+		main_loop->Break();
+		return InputResult::CLOSED;
+
+	case CommandResult::FINISH:
+		if (Flush())
+			Close();
+		return InputResult::CLOSED;
+
+	case CommandResult::CLOSE:
+		Close();
+		return InputResult::CLOSED;
+	}
+
+	if (IsExpired()) {
+		Close();
+		return InputResult::CLOSED;
+	}
+
+	return InputResult::AGAIN;
+}

src/ClientSubscribe.cxx

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ClientInternal.hxx"
+#include "Idle.hxx"
+
+#include <assert.h>
+#include <string.h>
+
+	bool Unsubscribe(const char *channel);
+	void UnsubscribeAll();
+	bool PushMessage(const ClientMessage &msg);
+
+Client::SubscribeResult
+Client::Subscribe(const char *channel)
+{
+	assert(channel != nullptr);
+
+	if (!client_message_valid_channel_name(channel))
+		return Client::SubscribeResult::INVALID;
+
+	if (num_subscriptions >= CLIENT_MAX_SUBSCRIPTIONS)
+		return Client::SubscribeResult::FULL;
+
+	auto r = subscriptions.insert(channel);
+	if (!r.second)
+		return Client::SubscribeResult::ALREADY;
+
+	++num_subscriptions;
+
+	idle_add(IDLE_SUBSCRIPTION);
+
+	return Client::SubscribeResult::OK;
+}
+
+bool
+Client::Unsubscribe(const char *channel)
+{
+	const auto i = subscriptions.find(channel);
+	if (i == subscriptions.end())
+		return false;
+
+	assert(num_subscriptions > 0);
+
+	subscriptions.erase(i);
+	--num_subscriptions;
+
+	idle_add(IDLE_SUBSCRIPTION);
+
+	assert((num_subscriptions == 0) ==
+	       subscriptions.empty());
+
+	return true;
+}
+
+void
+Client::UnsubscribeAll()
+{
+	subscriptions.clear();
+	num_subscriptions = 0;
+}
+
+bool
+Client::PushMessage(const ClientMessage &msg)
+{
+	if (messages.size() >= CLIENT_MAX_MESSAGES ||
+	    !IsSubscribed(msg.GetChannel()))
+		return false;
+
+	if (messages.empty())
+		IdleAdd(IDLE_MESSAGE);
+
+	messages.push_back(msg);
+	return true;
+}

src/ClientWrite.cxx

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ClientInternal.hxx"
+#include "util/FormatString.hxx"
+
+#include <string.h>
+
+/**
+ * Write a block of data to the client.
+ */
+static void
+client_write(Client &client, const char *data, size_t length)
+{
+	/* if the client is going to be closed, do nothing */
+	if (client.IsExpired() || length == 0)
+		return;
+
+	client.Write(data, length);
+}
+
+void
+client_puts(Client &client, const char *s)
+{
+	client_write(client, s, strlen(s));
+}
+
+void
+client_vprintf(Client &client, const char *fmt, va_list args)
+{
+	char *p = FormatNewV(fmt, args);
+	client_write(client, p, strlen(p));
+	delete[] p;
+}
+
+void
+client_printf(Client &client, const char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	client_vprintf(client, fmt, args);
+	va_end(args);
+}

src/CommandLine.cxx

@@ -0,0 +1,253 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "CommandLine.hxx"
+#include "ls.hxx"
+#include "LogInit.hxx"
+#include "Log.hxx"
+#include "ConfigGlobal.hxx"
+#include "DecoderList.hxx"
+#include "DecoderPlugin.hxx"
+#include "OutputList.hxx"
+#include "OutputPlugin.hxx"
+#include "InputRegistry.hxx"
+#include "InputPlugin.hxx"
+#include "PlaylistRegistry.hxx"
+#include "PlaylistPlugin.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "fs/Traits.hxx"
+#include "fs/FileSystem.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+#include "system/FatalError.hxx"
+
+#ifdef ENABLE_ENCODER
+#include "EncoderList.hxx"
+#include "EncoderPlugin.hxx"
+#endif
+
+#ifdef ENABLE_ARCHIVE
+#include "ArchiveList.hxx"
+#include "ArchivePlugin.hxx"
+#endif
+
+#include <glib.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef WIN32
+#define CONFIG_FILE_LOCATION		"\\mpd\\mpd.conf"
+#else
+#define USER_CONFIG_FILE_LOCATION1	".mpdconf"
+#define USER_CONFIG_FILE_LOCATION2	".mpd/mpd.conf"
+#define USER_CONFIG_FILE_LOCATION_XDG	"mpd/mpd.conf"
+#endif
+
+static constexpr Domain cmdline_domain("cmdline");
+
+gcc_noreturn
+static void version(void)
+{
+	puts("Music Player Daemon " VERSION "\n"
+	     "\n"
+	     "Copyright (C) 2003-2007 Warren Dukes <warren.dukes@gmail.com>\n"
+	     "Copyright (C) 2008-2013 Max Kellermann <max@duempel.org>\n"
+	     "This is free software; see the source for copying conditions.  There is NO\n"
+	     "warranty; not even MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
+	     "\n"
+	     "Decoders plugins:");
+
+	decoder_plugins_for_each([](const DecoderPlugin &plugin){
+			printf(" [%s]", plugin.name);
+
+			const char *const*suffixes = plugin.suffixes;
+			if (suffixes != nullptr)
+				for (; *suffixes != nullptr; ++suffixes)
+					printf(" %s", *suffixes);
+
+			puts("");
+		});
+
+	puts("\n"
+	     "Output plugins:");
+	audio_output_plugins_for_each(plugin)
+		printf(" %s", plugin->name);
+	puts("");
+
+#ifdef ENABLE_ENCODER
+	puts("\n"
+	     "Encoder plugins:");
+	encoder_plugins_for_each(plugin)
+		printf(" %s", plugin->name);
+	puts("");
+#endif
+
+#ifdef ENABLE_ARCHIVE
+	puts("\n"
+	     "Archive plugins:");
+	archive_plugins_for_each(plugin) {
+		printf(" [%s]", plugin->name);
+
+		const char *const*suffixes = plugin->suffixes;
+		if (suffixes != nullptr)
+			for (; *suffixes != nullptr; ++suffixes)
+				printf(" %s", *suffixes);
+
+		puts("");
+	}
+#endif
+
+	puts("\n"
+	     "Input plugins:");
+	input_plugins_for_each(plugin)
+		printf(" %s", plugin->name);
+
+	puts("\n\n"
+	     "Playlist plugins:");
+	playlist_plugins_for_each(plugin)
+		printf(" %s", plugin->name);
+
+	puts("\n\n"
+	     "Protocols:");
+	print_supported_uri_schemes_to_fp(stdout);
+
+	exit(EXIT_SUCCESS);
+}
+
+static const char *summary =
+	"Music Player Daemon - a daemon for playing music.";
+
+gcc_pure
+static AllocatedPath
+PathBuildChecked(const AllocatedPath &a, PathTraits::const_pointer b)
+{
+	if (a.IsNull())
+		return AllocatedPath::Null();
+
+	return AllocatedPath::Build(a, b);
+}
+
+bool
+parse_cmdline(int argc, char **argv, struct options *options,
+	      Error &error)
+{
+	GOptionContext *context;
+	bool ret;
+	static gboolean option_version,
+		option_no_daemon,
+		option_no_config;
+	const GOptionEntry entries[] = {
+		{ "kill", 0, 0, G_OPTION_ARG_NONE, &options->kill,
+		  "kill the currently running mpd session", nullptr },
+		{ "no-config", 0, 0, G_OPTION_ARG_NONE, &option_no_config,
+		  "don't read from config", nullptr },
+		{ "no-daemon", 0, 0, G_OPTION_ARG_NONE, &option_no_daemon,
+		  "don't detach from console", nullptr },
+		{ "stdout", 0, 0, G_OPTION_ARG_NONE, &options->log_stderr,
+		  nullptr, nullptr },
+		{ "stderr", 0, 0, G_OPTION_ARG_NONE, &options->log_stderr,
+		  "print messages to stderr", nullptr },
+		{ "verbose", 'v', 0, G_OPTION_ARG_NONE, &options->verbose,
+		  "verbose logging", nullptr },
+		{ "version", 'V', 0, G_OPTION_ARG_NONE, &option_version,
+		  "print version number", nullptr },
+		{ nullptr, 0, 0, G_OPTION_ARG_NONE, nullptr, nullptr, nullptr }
+	};
+
+	options->kill = false;
+	options->daemon = true;
+	options->log_stderr = false;
+	options->verbose = false;
+
+	context = g_option_context_new("[path/to/mpd.conf]");
+	g_option_context_add_main_entries(context, entries, nullptr);
+
+	g_option_context_set_summary(context, summary);
+
+	GError *gerror = nullptr;
+	ret = g_option_context_parse(context, &argc, &argv, &gerror);
+	g_option_context_free(context);
+
+	if (!ret)
+		FatalError("option parsing failed", gerror);
+
+	if (option_version)
+		version();
+
+	/* initialize the logging library, so the configuration file
+	   parser can use it already */
+	log_early_init(options->verbose);
+
+	options->daemon = !option_no_daemon;
+
+	if (option_no_config) {
+		LogDebug(cmdline_domain,
+			 "Ignoring config, using daemon defaults");
+		return true;
+	} else if (argc <= 1) {
+		/* default configuration file path */
+
+#ifdef WIN32
+		AllocatedPath path = PathBuildChecked(AllocatedPath::FromUTF8(g_get_user_config_dir()),
+					     CONFIG_FILE_LOCATION);
+		if (!path.IsNull() && FileExists(path))
+			return ReadConfigFile(path, error);
+
+		const char *const*system_config_dirs =
+			g_get_system_config_dirs();
+
+		for (unsigned i = 0; system_config_dirs[i] != nullptr; ++i) {
+			path = PathBuildChecked(AllocatedPath::FromUTF8(system_config_dirs[i]),
+						CONFIG_FILE_LOCATION);
+			if (!path.IsNull() && FileExists(path))
+				return ReadConfigFile(path, error);
+		}
+#else
+		AllocatedPath path = PathBuildChecked(AllocatedPath::FromUTF8(g_get_user_config_dir()),
+						      USER_CONFIG_FILE_LOCATION_XDG);
+		if (!path.IsNull() && FileExists(path))
+			return ReadConfigFile(path, error);
+
+		path = PathBuildChecked(AllocatedPath::FromUTF8(g_get_home_dir()),
+					     USER_CONFIG_FILE_LOCATION1);
+		if (!path.IsNull() && FileExists(path))
+			return ReadConfigFile(path, error);
+
+		path = PathBuildChecked(AllocatedPath::FromUTF8(g_get_home_dir()),
+					USER_CONFIG_FILE_LOCATION2);
+		if (!path.IsNull() && FileExists(path))
+			return ReadConfigFile(path, error);
+
+		path = AllocatedPath::FromUTF8(SYSTEM_CONFIG_FILE_LOCATION);
+		if (!path.IsNull() && FileExists(path))
+			return ReadConfigFile(path, error);
+#endif
+
+		error.Set(cmdline_domain, "No configuration file found");
+		return false;
+	} else if (argc == 2) {
+		/* specified configuration file */
+		return ReadConfigFile(Path::FromFS(argv[1]), error);
+	} else {
+		error.Set(cmdline_domain, "too many arguments");
+		return false;
+	}
+}

src/CommandLine.hxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -17,12 +17,12 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#ifndef CMDLINE_H
-#define CMDLINE_H
+#ifndef MPD_COMMAND_LINE_HXX
+#define MPD_COMMAND_LINE_HXX
 
 #include <glib.h>
 
-#include <stdbool.h>
+class Error;
 
 struct options {
 	gboolean kill;
@@ -33,6 +33,6 @@ struct options {
 
 bool
 parse_cmdline(int argc, char **argv, struct options *options,
-	      GError **error_r);
+	      Error &error);
 
 #endif

src/Compiler.h

@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef COMPILER_H
+#define COMPILER_H
+
+#define GCC_CHECK_VERSION(major, minor) \
+  (defined(__GNUC__) &&                                                 \
+   (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))))
+
+#ifdef __GNUC__
+#define GCC_VERSION (__GNUC__ * 10000 \
+                     + __GNUC_MINOR__ * 100 \
+                     + __GNUC_PATCHLEVEL__)
+#else
+#define GCC_VERSION 0
+#endif
+
+#ifdef __clang__
+#  define CLANG_VERSION (__clang_major__ * 10000 \
+			 + __clang_minor__ * 100 \
+			 + __clang_patchlevel__)
+#  if __clang_major__ < 3
+#    error Sorry, your clang version is too old.  You need at least version 3.1.
+#  endif
+#elif defined(__GNUC__)
+#  if !GCC_CHECK_VERSION(4,6)
+#    error Sorry, your gcc version is too old.  You need at least version 4.6.
+#  endif
+#else
+#  warning Untested compiler.  Use at your own risk!
+#endif
+
+#if GCC_CHECK_VERSION(4,0)
+
+/* GCC 4.x */
+
+#define gcc_const __attribute__((const))
+#define gcc_deprecated __attribute__((deprecated))
+#define gcc_may_alias __attribute__((may_alias))
+#define gcc_malloc __attribute__((malloc))
+#define gcc_noreturn __attribute__((noreturn))
+#define gcc_packed __attribute__((packed))
+#define gcc_printf(a,b) __attribute__((format(printf, a, b)))
+#define gcc_pure __attribute__((pure))
+#define gcc_sentinel __attribute__((sentinel))
+#define gcc_unused __attribute__((unused))
+#define gcc_warn_unused_result __attribute__((warn_unused_result))
+
+#define gcc_nonnull(...) __attribute__((nonnull(__VA_ARGS__)))
+#define gcc_nonnull_all __attribute__((nonnull))
+
+#define gcc_likely(x) __builtin_expect (!!(x), 1)
+#define gcc_unlikely(x) __builtin_expect (!!(x), 0)
+
+#define gcc_aligned(n) __attribute__((aligned(n)))
+
+#define gcc_visibility_hidden __attribute__((visibility("hidden")))
+#define gcc_visibility_default __attribute__((visibility("default")))
+
+#define gcc_always_inline __attribute__((always_inline))
+
+#else
+
+/* generic C compiler */
+
+#define gcc_const
+#define gcc_deprecated
+#define gcc_may_alias
+#define gcc_malloc
+#define gcc_noreturn
+#define gcc_packed
+#define gcc_printf(a,b)
+#define gcc_pure
+#define gcc_sentinel
+#define gcc_unused
+#define gcc_warn_unused_result
+
+#define gcc_nonnull(...)
+#define gcc_nonnull_all
+
+#define gcc_likely(x) (x)
+#define gcc_unlikely(x) (x)
+
+#define gcc_aligned(n)
+
+#define gcc_visibility_hidden
+#define gcc_visibility_default
+
+#define gcc_always_inline inline
+
+#endif
+
+#if GCC_CHECK_VERSION(4,3)
+
+#define gcc_hot __attribute__((hot))
+#define gcc_cold __attribute__((cold))
+
+#else /* ! GCC_UNUSED >= 40300 */
+
+#define gcc_hot
+#define gcc_cold
+
+#endif /* ! GCC_UNUSED >= 40300 */
+
+#if GCC_CHECK_VERSION(4,6) && !defined(__clang__)
+#define gcc_flatten __attribute__((flatten))
+#else
+#define gcc_flatten
+#endif
+
+#ifndef __cplusplus
+/* plain C99 has "restrict" */
+#define gcc_restrict restrict
+#elif GCC_CHECK_VERSION(4,0)
+/* "__restrict__" is a GCC extension for C++ */
+#define gcc_restrict __restrict__
+#else
+/* disable it on other compilers */
+#define gcc_restrict
+#endif
+
+/* C++11 features */
+
+#if defined(__cplusplus)
+
+/* support for C++11 "override" was added in gcc 4.7 */
+#if !defined(__clang__) && !GCC_CHECK_VERSION(4,7)
+#define override
+#define final
+#endif
+
+#if defined(__clang__) || GCC_CHECK_VERSION(4,8)
+#define gcc_alignas(T, fallback) alignas(T)
+#else
+#define gcc_alignas(T, fallback) gcc_aligned(fallback)
+#endif
+
+#endif
+
+#ifndef __has_feature
+  // define dummy macro for non-clang compilers
+  #define __has_feature(x) 0
+#endif
+
+#if __has_feature(attribute_unused_on_fields)
+#define gcc_unused_field gcc_unused
+#else
+#define gcc_unused_field
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#define gcc_unreachable() __builtin_unreachable()
+#else
+#define gcc_unreachable()
+#endif
+
+#endif

src/ConfigData.cxx

@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ConfigData.hxx"
+#include "ConfigParser.hxx"
+#include "ConfigPath.hxx"
+#include "util/Error.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "system/FatalError.hxx"
+
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+
+int
+block_param::GetIntValue() const
+{
+	char *endptr;
+	long value2 = strtol(value.c_str(), &endptr, 0);
+	if (*endptr != 0)
+		FormatFatalError("Not a valid number in line %i", line);
+
+	return value2;
+}
+
+unsigned
+block_param::GetUnsignedValue() const
+{
+	char *endptr;
+	unsigned long value2 = strtoul(value.c_str(), &endptr, 0);
+	if (*endptr != 0)
+		FormatFatalError("Not a valid number in line %i", line);
+
+	return (unsigned)value2;
+}
+
+bool
+block_param::GetBoolValue() const
+{
+	bool value2;
+	if (!get_bool(value.c_str(), &value2))
+		FormatFatalError("%s is not a boolean value (yes, true, 1) or "
+				 "(no, false, 0) on line %i\n",
+				 name.c_str(), line);
+
+	return value2;
+}
+
+config_param::config_param(const char *_value, int _line)
+	:next(nullptr), value(_value), line(_line) {}
+
+config_param::~config_param()
+{
+	delete next;
+}
+
+const block_param *
+config_param::GetBlockParam(const char *name) const
+{
+	for (const auto &i : block_params) {
+		if (i.name == name) {
+			i.used = true;
+			return &i;
+		}
+	}
+
+	return NULL;
+}
+
+const char *
+config_param::GetBlockValue(const char *name, const char *default_value) const
+{
+	const block_param *bp = GetBlockParam(name);
+	if (bp == nullptr)
+		return default_value;
+
+	return bp->value.c_str();
+}
+
+AllocatedPath
+config_param::GetBlockPath(const char *name, const char *default_value,
+			   Error &error) const
+{
+	assert(!error.IsDefined());
+
+	int line2 = line;
+	const char *s;
+
+	const block_param *bp = GetBlockParam(name);
+	if (bp != nullptr) {
+		line2 = bp->line;
+		s = bp->value.c_str();
+	} else {
+		if (default_value == nullptr)
+			return AllocatedPath::Null();
+
+		s = default_value;
+	}
+
+	AllocatedPath path = ParsePath(s, error);
+	if (gcc_unlikely(path.IsNull()))
+		error.FormatPrefix("Invalid path in \"%s\" at line %i: ",
+				   name, line2);
+
+	return path;
+}
+
+AllocatedPath
+config_param::GetBlockPath(const char *name, Error &error) const
+{
+	return GetBlockPath(name, nullptr, error);
+}
+
+int
+config_param::GetBlockValue(const char *name, int default_value) const
+{
+	const block_param *bp = GetBlockParam(name);
+	if (bp == nullptr)
+		return default_value;
+
+	return bp->GetIntValue();
+}
+
+unsigned
+config_param::GetBlockValue(const char *name, unsigned default_value) const
+{
+	const block_param *bp = GetBlockParam(name);
+	if (bp == nullptr)
+		return default_value;
+
+	return bp->GetUnsignedValue();
+}
+
+gcc_pure
+bool
+config_param::GetBlockValue(const char *name, bool default_value) const
+{
+	const block_param *bp = GetBlockParam(name);
+	if (bp == NULL)
+		return default_value;
+
+	return bp->GetBoolValue();
+}

src/ConfigData.hxx

@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CONFIG_DATA_HXX
+#define MPD_CONFIG_DATA_HXX
+
+#include "ConfigOption.hxx"
+#include "Compiler.h"
+
+#include <string>
+#include <array>
+#include <vector>
+
+class AllocatedPath;
+class Error;
+
+struct block_param {
+	std::string name;
+	std::string value;
+	int line;
+
+	/**
+	 * This flag is false when nobody has queried the value of
+	 * this option yet.
+	 */
+	mutable bool used;
+
+	gcc_nonnull_all
+	block_param(const char *_name, const char *_value, int _line=-1)
+		:name(_name), value(_value), line(_line), used(false) {}
+
+	gcc_pure
+	int GetIntValue() const;
+
+	gcc_pure
+	unsigned GetUnsignedValue() const;
+
+	gcc_pure
+	bool GetBoolValue() const;
+};
+
+struct config_param {
+	/**
+	 * The next config_param with the same name.  The destructor
+	 * deletes the whole chain.
+	 */
+	struct config_param *next;
+
+	std::string value;
+
+	unsigned int line;
+
+	std::vector<block_param> block_params;
+
+	/**
+	 * This flag is false when nobody has queried the value of
+	 * this option yet.
+	 */
+	bool used;
+
+	config_param(int _line=-1)
+		:next(nullptr), line(_line), used(false) {}
+
+	gcc_nonnull_all
+	config_param(const char *_value, int _line=-1);
+
+	config_param(const config_param &) = delete;
+
+	~config_param();
+
+	config_param &operator=(const config_param &) = delete;
+
+	/**
+	 * Determine if this is a "null" instance, i.e. an empty
+	 * object that was synthesized and not loaded from a
+	 * configuration file.
+	 */
+	bool IsNull() const {
+		return line == unsigned(-1);
+	}
+
+	gcc_nonnull_all
+	void AddBlockParam(const char *_name, const char *_value,
+			   int _line=-1) {
+		block_params.emplace_back(_name, _value, _line);
+	}
+
+	gcc_nonnull_all gcc_pure
+	const block_param *GetBlockParam(const char *_name) const;
+
+	gcc_pure
+	const char *GetBlockValue(const char *name,
+				  const char *default_value=nullptr) const;
+
+	/**
+	 * Same as config_dup_path(), but looks up the setting in the
+	 * specified block.
+	 */
+	AllocatedPath GetBlockPath(const char *name, const char *default_value,
+				   Error &error) const;
+
+	AllocatedPath GetBlockPath(const char *name, Error &error) const;
+
+	gcc_pure
+	int GetBlockValue(const char *name, int default_value) const;
+
+	gcc_pure
+	unsigned GetBlockValue(const char *name, unsigned default_value) const;
+
+	gcc_pure
+	bool GetBlockValue(const char *name, bool default_value) const;
+};
+
+struct ConfigData {
+	std::array<config_param *, std::size_t(CONF_MAX)> params;
+};
+
+#endif

src/ConfigDefaults.hxx

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CONFIG_DEFAULTS_HXX
+#define MPD_CONFIG_DEFAULTS_HXX
+
+static constexpr unsigned DEFAULT_PLAYLIST_MAX_LENGTH = 16 * 1024;
+static constexpr bool DEFAULT_PLAYLIST_SAVE_ABSOLUTE_PATHS = false;
+
+#endif

src/ConfigError.cxx

@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "ConfigError.hxx"
+#include "util/Domain.hxx"
+
+const Domain config_domain("config");

src/ConfigError.hxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -17,9 +17,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#ifndef MPD_INPUT_FILE_H
-#define MPD_INPUT_FILE_H
+#ifndef MPD_CONFIG_ERROR_HXX
+#define MPD_CONFIG_ERROR_HXX
 
-extern const struct input_plugin input_plugin_file;
+extern const class Domain config_domain;
 
 #endif

src/ConfigFile.cxx

@@ -0,0 +1,272 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ConfigFile.hxx"
+#include "ConfigError.hxx"
+#include "ConfigData.hxx"
+#include "ConfigTemplates.hxx"
+#include "util/Tokenizer.hxx"
+#include "util/StringUtil.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+#include "fs/Limits.hxx"
+#include "fs/Path.hxx"
+#include "fs/FileSystem.hxx"
+#include "Log.hxx"
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+#define MAX_STRING_SIZE	MPD_PATH_MAX+80
+
+#define CONF_COMMENT		'#'
+
+static constexpr Domain config_file_domain("config_file");
+
+static bool
+config_read_name_value(struct config_param *param, char *input, unsigned line,
+		       Error &error)
+{
+	Tokenizer tokenizer(input);
+
+	const char *name = tokenizer.NextWord(error);
+	if (name == nullptr) {
+		assert(!tokenizer.IsEnd());
+		return false;
+	}
+
+	const char *value = tokenizer.NextString(error);
+	if (value == nullptr) {
+		if (tokenizer.IsEnd()) {
+			error.Set(config_file_domain, "Value missing");
+		} else {
+			assert(error.IsDefined());
+		}
+
+		return false;
+	}
+
+	if (!tokenizer.IsEnd() && tokenizer.CurrentChar() != CONF_COMMENT) {
+		error.Set(config_file_domain, "Unknown tokens after value");
+		return false;
+	}
+
+	const struct block_param *bp = param->GetBlockParam(name);
+	if (bp != nullptr) {
+		error.Format(config_file_domain,
+			     "\"%s\" is duplicate, first defined on line %i",
+			     name, bp->line);
+		return false;
+	}
+
+	param->AddBlockParam(name, value, line);
+	return true;
+}
+
+static struct config_param *
+config_read_block(FILE *fp, int *count, char *string, Error &error)
+{
+	struct config_param *ret = new config_param(*count);
+
+	while (true) {
+		char *line;
+
+		line = fgets(string, MAX_STRING_SIZE, fp);
+		if (line == nullptr) {
+			delete ret;
+			error.Set(config_file_domain,
+				  "Expected '}' before end-of-file");
+			return nullptr;
+		}
+
+		(*count)++;
+		line = strchug_fast(line);
+		if (*line == 0 || *line == CONF_COMMENT)
+			continue;
+
+		if (*line == '}') {
+			/* end of this block; return from the function
+			   (and from this "while" loop) */
+
+			line = strchug_fast(line + 1);
+			if (*line != 0 && *line != CONF_COMMENT) {
+				delete ret;
+				error.Format(config_file_domain,
+					     "line %i: Unknown tokens after '}'",
+					     *count);
+				return nullptr;
+			}
+
+			return ret;
+		}
+
+		/* parse name and value */
+
+		if (!config_read_name_value(ret, line, *count, error)) {
+			assert(*line != 0);
+			delete ret;
+			error.FormatPrefix("line %i: ", *count);
+			return nullptr;
+		}
+	}
+}
+
+gcc_nonnull_all
+static void
+Append(config_param *&head, config_param *p)
+{
+	assert(p->next == nullptr);
+
+	config_param **i = &head;
+	while (*i != nullptr)
+		i = &(*i)->next;
+
+	*i = p;
+}
+
+static bool
+ReadConfigFile(ConfigData &config_data, FILE *fp, Error &error)
+{
+	assert(fp != nullptr);
+
+	char string[MAX_STRING_SIZE + 1];
+	int count = 0;
+	struct config_param *param;
+
+	while (fgets(string, MAX_STRING_SIZE, fp)) {
+		char *line;
+		const char *name, *value;
+
+		count++;
+
+		line = strchug_fast(string);
+		if (*line == 0 || *line == CONF_COMMENT)
+			continue;
+
+		/* the first token in each line is the name, followed
+		   by either the value or '{' */
+
+		Tokenizer tokenizer(line);
+		name = tokenizer.NextWord(error);
+		if (name == nullptr) {
+			assert(!tokenizer.IsEnd());
+			error.FormatPrefix("line %i: ", count);
+			return false;
+		}
+
+		/* get the definition of that option, and check the
+		   "repeatable" flag */
+
+		const ConfigOption o = ParseConfigOptionName(name);
+		if (o == CONF_MAX) {
+			error.Format(config_file_domain,
+				     "unrecognized parameter in config file at "
+				     "line %i: %s\n", count, name);
+			return false;
+		}
+
+		const unsigned i = unsigned(o);
+		const ConfigTemplate &option = config_templates[i];
+		config_param *&head = config_data.params[i];
+
+		if (head != nullptr && !option.repeatable) {
+			param = head;
+			error.Format(config_file_domain,
+				     "config parameter \"%s\" is first defined "
+				     "on line %i and redefined on line %i\n",
+				     name, param->line, count);
+			return false;
+		}
+
+		/* now parse the block or the value */
+
+		if (option.block) {
+			/* it's a block, call config_read_block() */
+
+			if (tokenizer.CurrentChar() != '{') {
+				error.Format(config_file_domain,
+					     "line %i: '{' expected", count);
+				return false;
+			}
+
+			line = strchug_fast(tokenizer.Rest() + 1);
+			if (*line != 0 && *line != CONF_COMMENT) {
+				error.Format(config_file_domain,
+					     "line %i: Unknown tokens after '{'",
+					     count);
+				return false;
+			}
+
+			param = config_read_block(fp, &count, string, error);
+			if (param == nullptr) {
+				return false;
+			}
+		} else {
+			/* a string value */
+
+			value = tokenizer.NextString(error);
+			if (value == nullptr) {
+				if (tokenizer.IsEnd())
+					error.Format(config_file_domain,
+						     "line %i: Value missing",
+						     count);
+				else
+					error.FormatPrefix("line %i: ", count);
+
+				return false;
+			}
+
+			if (!tokenizer.IsEnd() &&
+			    tokenizer.CurrentChar() != CONF_COMMENT) {
+				error.Format(config_file_domain,
+					     "line %i: Unknown tokens after value",
+					     count);
+				return false;
+			}
+
+			param = new config_param(value, count);
+		}
+
+		Append(head, param);
+	}
+
+	return true;
+}
+
+bool
+ReadConfigFile(ConfigData &config_data, Path path, Error &error)
+{
+	assert(!path.IsNull());
+	const std::string path_utf8 = path.ToUTF8();
+
+	FormatDebug(config_file_domain, "loading file %s", path_utf8.c_str());
+
+	FILE *fp = FOpen(path, FOpenMode::ReadText);
+	if (fp == nullptr) {
+		error.FormatErrno("Failed to open %s", path_utf8.c_str());
+		return false;
+	}
+
+	bool result = ReadConfigFile(config_data, fp, error);
+	fclose(fp);
+	return result;
+}

src/ConfigFile.hxx

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CONFIG_FILE_HXX
+#define MPD_CONFIG_FILE_HXX
+
+class Error;
+class Path;
+struct ConfigData;
+
+bool
+ReadConfigFile(ConfigData &data, Path path, Error &error);
+
+#endif

src/ConfigGlobal.cxx

@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ConfigGlobal.hxx"
+#include "ConfigParser.hxx"
+#include "ConfigData.hxx"
+#include "ConfigFile.hxx"
+#include "ConfigPath.hxx"
+#include "ConfigError.hxx"
+#include "fs/Path.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "util/Error.hxx"
+#include "system/FatalError.hxx"
+#include "Log.hxx"
+
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+
+static ConfigData config_data;
+
+void config_global_finish(void)
+{
+	for (auto i : config_data.params)
+		delete i;
+}
+
+void config_global_init(void)
+{
+}
+
+bool
+ReadConfigFile(Path path, Error &error)
+{
+	return ReadConfigFile(config_data, path, error);
+}
+
+static void
+Check(const config_param *param)
+{
+	if (!param->used)
+		/* this whole config_param was not queried at all -
+		   the feature might be disabled at compile time?
+		   Silently ignore it here. */
+		return;
+
+	for (const auto &i : param->block_params) {
+		if (!i.used)
+			FormatWarning(config_domain,
+				      "option '%s' on line %i was not recognized",
+				      i.name.c_str(), i.line);
+	}
+}
+
+void config_global_check(void)
+{
+	for (auto i : config_data.params)
+		for (const config_param *p = i; p != nullptr; p = p->next)
+			Check(p);
+}
+
+const struct config_param *
+config_get_next_param(ConfigOption option, const struct config_param * last)
+{
+	config_param *param = last != nullptr
+		? last->next
+		: config_data.params[unsigned(option)];
+	if (param != nullptr)
+		param->used = true;
+	return param;
+}
+
+const char *
+config_get_string(ConfigOption option, const char *default_value)
+{
+	const struct config_param *param = config_get_param(option);
+
+	if (param == nullptr)
+		return default_value;
+
+	return param->value.c_str();
+}
+
+AllocatedPath
+config_get_path(ConfigOption option, Error &error)
+{
+	const struct config_param *param = config_get_param(option);
+	if (param == nullptr)
+		return AllocatedPath::Null();
+
+	return config_parse_path(param, error);
+}
+
+AllocatedPath
+config_parse_path(const struct config_param *param, Error & error)
+{
+	AllocatedPath path = ParsePath(param->value.c_str(), error);
+	if (gcc_unlikely(path.IsNull()))
+		error.FormatPrefix("Invalid path at line %i: ",
+				   param->line);
+
+	return path;
+}
+
+unsigned
+config_get_unsigned(ConfigOption option, unsigned default_value)
+{
+	const struct config_param *param = config_get_param(option);
+	long value;
+	char *endptr;
+
+	if (param == nullptr)
+		return default_value;
+
+	value = strtol(param->value.c_str(), &endptr, 0);
+	if (*endptr != 0 || value < 0)
+		FormatFatalError("Not a valid non-negative number in line %i",
+				 param->line);
+
+	return (unsigned)value;
+}
+
+unsigned
+config_get_positive(ConfigOption option, unsigned default_value)
+{
+	const struct config_param *param = config_get_param(option);
+	long value;
+	char *endptr;
+
+	if (param == nullptr)
+		return default_value;
+
+	value = strtol(param->value.c_str(), &endptr, 0);
+	if (*endptr != 0)
+		FormatFatalError("Not a valid number in line %i", param->line);
+
+	if (value <= 0)
+		FormatFatalError("Not a positive number in line %i",
+				 param->line);
+
+	return (unsigned)value;
+}
+
+bool
+config_get_bool(ConfigOption option, bool default_value)
+{
+	const struct config_param *param = config_get_param(option);
+	bool success, value;
+
+	if (param == nullptr)
+		return default_value;
+
+	success = get_bool(param->value.c_str(), &value);
+	if (!success)
+		FormatFatalError("Expected boolean value (yes, true, 1) or "
+				 "(no, false, 0) on line %i\n",
+				 param->line);
+
+	return value;
+}

src/ConfigGlobal.hxx

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CONFIG_GLOBAL_HXX
+#define MPD_CONFIG_GLOBAL_HXX
+
+#include "ConfigOption.hxx"
+#include "Compiler.h"
+
+class Error;
+class Path;
+class AllocatedPath;
+
+void config_global_init(void);
+void config_global_finish(void);
+
+/**
+ * Call this function after all configuration has been evaluated.  It
+ * checks for unused parameters, and logs warnings.
+ */
+void config_global_check(void);
+
+bool
+ReadConfigFile(Path path, Error &error);
+
+/* don't free the returned value
+   set _last_ to nullptr to get first entry */
+gcc_pure
+const struct config_param *
+config_get_next_param(enum ConfigOption option,
+		      const struct config_param *last);
+
+gcc_pure
+static inline const struct config_param *
+config_get_param(enum ConfigOption option)
+{
+	return config_get_next_param(option, nullptr);
+}
+
+/* Note on gcc_pure: Some of the functions declared pure are not
+   really pure in strict sense.  They have side effect such that they
+   validate parameter's value and signal an error if it's invalid.
+   However, if the argument was already validated or we don't care
+   about the argument at all, this may be ignored so in the end, we
+   should be fine with calling those functions pure.  */
+
+gcc_pure
+const char *
+config_get_string(enum ConfigOption option, const char *default_value);
+
+/**
+ * Returns an optional configuration variable which contains an
+ * absolute path.  If there is a tilde prefix, it is expanded.
+ * Returns AllocatedPath::Null() if the value is not present.  If the path
+ * could not be parsed, returns AllocatedPath::Null() and sets the error.
+ */
+AllocatedPath
+config_get_path(enum ConfigOption option, Error &error);
+
+/**
+ * Parse a configuration parameter as a path.
+ * If there is a tilde prefix, it is expanded. If the path could
+ * not be parsed, returns AllocatedPath::Null() and sets the error.
+ */
+AllocatedPath
+config_parse_path(const struct config_param *param, Error & error_r);
+
+gcc_pure
+unsigned
+config_get_unsigned(enum ConfigOption option, unsigned default_value);
+
+gcc_pure
+unsigned
+config_get_positive(enum ConfigOption option, unsigned default_value);
+
+gcc_pure
+bool config_get_bool(enum ConfigOption option, bool default_value);
+
+#endif

src/ConfigOption.hxx

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CONFIG_OPTION_HXX
+#define MPD_CONFIG_OPTION_HXX
+
+#include "Compiler.h"
+
+enum ConfigOption {
+	CONF_MUSIC_DIR,
+	CONF_PLAYLIST_DIR,
+	CONF_FOLLOW_INSIDE_SYMLINKS,
+	CONF_FOLLOW_OUTSIDE_SYMLINKS,
+	CONF_DB_FILE,
+	CONF_STICKER_FILE,
+	CONF_LOG_FILE,
+	CONF_PID_FILE,
+	CONF_STATE_FILE,
+	CONF_RESTORE_PAUSED,
+	CONF_USER,
+	CONF_GROUP,
+	CONF_BIND_TO_ADDRESS,
+	CONF_PORT,
+	CONF_LOG_LEVEL,
+	CONF_ZEROCONF_NAME,
+	CONF_ZEROCONF_ENABLED,
+	CONF_PASSWORD,
+	CONF_DEFAULT_PERMS,
+	CONF_AUDIO_OUTPUT,
+	CONF_AUDIO_OUTPUT_FORMAT,
+	CONF_MIXER_TYPE,
+	CONF_REPLAYGAIN,
+	CONF_REPLAYGAIN_PREAMP,
+	CONF_REPLAYGAIN_MISSING_PREAMP,
+	CONF_REPLAYGAIN_LIMIT,
+	CONF_VOLUME_NORMALIZATION,
+	CONF_SAMPLERATE_CONVERTER,
+	CONF_AUDIO_BUFFER_SIZE,
+	CONF_BUFFER_BEFORE_PLAY,
+	CONF_HTTP_PROXY_HOST,
+	CONF_HTTP_PROXY_PORT,
+	CONF_HTTP_PROXY_USER,
+	CONF_HTTP_PROXY_PASSWORD,
+	CONF_CONN_TIMEOUT,
+	CONF_MAX_CONN,
+	CONF_MAX_PLAYLIST_LENGTH,
+	CONF_MAX_COMMAND_LIST_SIZE,
+	CONF_MAX_OUTPUT_BUFFER_SIZE,
+	CONF_FS_CHARSET,
+	CONF_ID3V1_ENCODING,
+	CONF_METADATA_TO_USE,
+	CONF_SAVE_ABSOLUTE_PATHS,
+	CONF_DECODER,
+	CONF_INPUT,
+	CONF_GAPLESS_MP3_PLAYBACK,
+	CONF_PLAYLIST_PLUGIN,
+	CONF_AUTO_UPDATE,
+	CONF_AUTO_UPDATE_DEPTH,
+	CONF_DESPOTIFY_USER,
+	CONF_DESPOTIFY_PASSWORD,
+	CONF_DESPOTIFY_HIGH_BITRATE,
+	CONF_AUDIO_FILTER,
+	CONF_DATABASE,
+	CONF_MAX
+};
+
+/**
+ * @return #CONF_MAX if not found
+ */
+gcc_pure
+enum ConfigOption
+ParseConfigOptionName(const char *name);
+
+#endif

src/ConfigParser.cxx

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "ConfigParser.hxx"
+#include "util/StringUtil.hxx"
+
+bool
+get_bool(const char *value, bool *value_r)
+{
+	static const char *t[] = { "yes", "true", "1", nullptr };
+	static const char *f[] = { "no", "false", "0", nullptr };
+
+	if (string_array_contains(t, value)) {
+		*value_r = true;
+		return true;
+	}
+
+	if (string_array_contains(f, value)) {
+		*value_r = false;
+		return true;
+	}
+
+	return false;
+}

src/ConfigParser.hxx

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CONFIG_PARSER_HXX
+#define MPD_CONFIG_PARSER_HXX
+
+bool
+get_bool(const char *value, bool *value_r);
+
+#endif

src/ConfigPath.cxx

@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ConfigPath.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "fs/Traits.hxx"
+#include "fs/Domain.hxx"
+#include "util/Error.hxx"
+#include "ConfigGlobal.hxx"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <string.h>
+
+#ifndef WIN32
+#include <pwd.h>
+
+/**
+ * Determine a given user's home directory.
+ */
+static AllocatedPath
+GetHome(const char *user, Error &error)
+{
+	passwd *pw = getpwnam(user);
+	if (pw == nullptr) {
+		error.Format(path_domain,
+			     "no such user: %s", user);
+		return AllocatedPath::Null();
+	}
+
+	return AllocatedPath::FromFS(pw->pw_dir);
+}
+
+/**
+ * Determine the current user's home directory.
+ */
+static AllocatedPath
+GetHome(Error &error)
+{
+	const char *home = g_get_home_dir();
+	if (home == nullptr) {
+		error.Set(path_domain,
+			  "problems getting home for current user");
+		return AllocatedPath::Null();
+	}
+
+	return AllocatedPath::FromUTF8(home, error);
+}
+
+/**
+ * Determine the configured user's home directory.
+ */
+static AllocatedPath
+GetConfiguredHome(Error &error)
+{
+	const char *user = config_get_string(CONF_USER, nullptr);
+	return user != nullptr
+		? GetHome(user, error)
+		: GetHome(error);
+}
+
+#endif
+
+AllocatedPath
+ParsePath(const char *path, Error &error)
+{
+	assert(path != nullptr);
+
+#ifndef WIN32
+	if (path[0] == '~') {
+		++path;
+
+		if (*path == '\0')
+			return GetConfiguredHome(error);
+
+		AllocatedPath home = AllocatedPath::Null();
+
+		if (*path == '/') {
+			home = GetConfiguredHome(error);
+
+			++path;
+		} else {
+			const char *slash = strchr(path, '/');
+			const char *end = slash == nullptr
+					? path + strlen(path)
+					: slash;
+			const std::string user(path, end);
+			home = GetHome(user.c_str(), error);
+
+			if (slash == nullptr)
+				return home;
+
+			path = slash + 1;
+		}
+
+		if (home.IsNull())
+			return AllocatedPath::Null();
+
+		AllocatedPath path2 = AllocatedPath::FromUTF8(path, error);
+		if (path2.IsNull())
+			return AllocatedPath::Null();
+
+		return AllocatedPath::Build(home, path2);
+	} else if (!PathTraits::IsAbsoluteUTF8(path)) {
+		error.Format(path_domain,
+			     "not an absolute path: %s", path);
+		return AllocatedPath::Null();
+	} else {
+#endif
+		return AllocatedPath::FromUTF8(path, error);
+#ifndef WIN32
+	}
+#endif
+}

src/ConfigPath.hxx

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CONFIG_PATH_HXX
+#define MPD_CONFIG_PATH_HXX
+
+class AllocatedPath;
+class Error;
+
+AllocatedPath
+ParsePath(const char *path, Error &error);
+
+#endif

src/ConfigTemplates.cxx

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "ConfigTemplates.hxx"
+#include "ConfigOption.hxx"
+
+#include <string.h>
+
+const ConfigTemplate config_templates[] = {
+	{ "music_directory", false, false },
+	{ "playlist_directory", false, false },
+	{ "follow_inside_symlinks", false, false },
+	{ "follow_outside_symlinks", false, false },
+	{ "db_file", false, false },
+	{ "sticker_file", false, false },
+	{ "log_file", false, false },
+	{ "pid_file", false, false },
+	{ "state_file", false, false },
+	{ "restore_paused", false, false },
+	{ "user", false, false },
+	{ "group", false, false },
+	{ "bind_to_address", true, false },
+	{ "port", false, false },
+	{ "log_level", false, false },
+	{ "zeroconf_name", false, false },
+	{ "zeroconf_enabled", false, false },
+	{ "password", true, false },
+	{ "default_permissions", false, false },
+	{ "audio_output", true, true },
+	{ "audio_output_format", false, false },
+	{ "mixer_type", false, false },
+	{ "replaygain", false, false },
+	{ "replaygain_preamp", false, false },
+	{ "replaygain_missing_preamp", false, false },
+	{ "replaygain_limit", false, false },
+	{ "volume_normalization", false, false },
+	{ "samplerate_converter", false, false },
+	{ "audio_buffer_size", false, false },
+	{ "buffer_before_play", false, false },
+	{ "http_proxy_host", false, false },
+	{ "http_proxy_port", false, false },
+	{ "http_proxy_user", false, false },
+	{ "http_proxy_password", false, false },
+	{ "connection_timeout", false, false },
+	{ "max_connections", false, false },
+	{ "max_playlist_length", false, false },
+	{ "max_command_list_size", false, false },
+	{ "max_output_buffer_size", false, false },
+	{ "filesystem_charset", false, false },
+	{ "id3v1_encoding", false, false },
+	{ "metadata_to_use", false, false },
+	{ "save_absolute_paths_in_playlists", false, false },
+	{ "decoder", true, true },
+	{ "input", true, true },
+	{ "gapless_mp3_playback", false, false },
+	{ "playlist_plugin", true, true },
+	{ "auto_update", false, false },
+	{ "auto_update_depth", false, false },
+	{ "despotify_user", false, false },
+	{ "despotify_password", false, false},
+	{ "despotify_high_bitrate", false, false },
+	{ "filter", true, true },
+	{ "database", false, true },
+};
+
+static constexpr unsigned n_config_templates =
+	sizeof(config_templates) / sizeof(config_templates[0]);
+
+static_assert(n_config_templates == unsigned(CONF_MAX),
+	      "Wrong number of config_templates");
+
+ConfigOption
+ParseConfigOptionName(const char *name)
+{
+	for (unsigned i = 0; i < n_config_templates; ++i)
+		if (strcmp(config_templates[i].name, name) == 0)
+			return ConfigOption(i);
+
+	return CONF_MAX;
+}

src/ConfigTemplates.hxx

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CONFIG_TEMPLATES_HXX
+#define MPD_CONFIG_TEMPLATES_HXX
+
+#include "ConfigOption.hxx"
+
+struct ConfigTemplate {
+	const char *const name;
+	const bool repeatable;
+	const bool block;
+};
+
+extern const ConfigTemplate config_templates[];
+
+#endif

src/CrossFade.cxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -18,32 +18,25 @@
  */
 
 #include "config.h"
-#include "crossfade.h"
-#include "pcm_mix.h"
-#include "chunk.h"
-#include "audio_format.h"
-#include "tag.h"
+#include "CrossFade.hxx"
+#include "MusicChunk.hxx"
+#include "AudioFormat.hxx"
+#include "util/NumberParser.hxx"
+#include "util/Domain.hxx"
+#include "Log.hxx"
 
 #include <assert.h>
 #include <string.h>
 #include <stdlib.h>
-#include <glib.h>
 
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN "crossfade"
+static constexpr Domain cross_fade_domain("cross_fade");
 
-#ifdef G_OS_WIN32
-static char *
-strtok_r(char *str, const char *delim, G_GNUC_UNUSED char **saveptr)
+gcc_pure
+static float
+mixramp_interpolate(const char *ramp_list, float required_db)
 {
-	return strtok(str, delim);
-}
-#endif
-
-static float mixramp_interpolate(char *ramp_list, float required_db)
-{
-	float db, secs, last_db = nan(""), last_secs = 0;
-	char *ramp_str, *save_str = NULL;
+	float last_db = 0, last_secs = 0;
+	bool have_last = false;
 
 	/* ramp_list is a string of pairs of dBs and seconds that describe the
 	 * volume profile. Delimiters are semi-colons between pairs and spaces
@@ -51,24 +44,22 @@ static float mixramp_interpolate(char *ramp_list, float required_db)
 	 * The dB values must be monotonically increasing for this to work. */
 
 	while (1) {
-		/* Parse the dB tokens out of the input string. */
-		ramp_str = strtok_r(ramp_list, " ", &save_str);
-
-		/* Tell strtok to continue next time round. */
-		ramp_list = NULL;
-
 		/* Parse the dB value. */
-		if (NULL == ramp_str) {
-			return nan("");
-		}
-		db = (float)atof(ramp_str);
+		char *endptr;
+		const float db = ParseFloat(ramp_list, &endptr);
+		if (endptr == ramp_list || *endptr != ' ')
+			break;
+
+		ramp_list = endptr + 1;
 
 		/* Parse the time. */
-		ramp_str = strtok_r(NULL, ";", &save_str);
-		if (NULL == ramp_str) {
-			return nan("");
-		}
-		secs = (float)atof(ramp_str);
+		float secs = ParseFloat(ramp_list, &endptr);
+		if (endptr == ramp_list || (*endptr != ';' && *endptr != 0))
+			break;
+
+		ramp_list = endptr;
+		if (*ramp_list == ';')
+			++ramp_list;
 
 		/* Check for exact match. */
 		if (db == required_db) {
@@ -79,58 +70,70 @@ static float mixramp_interpolate(char *ramp_list, float required_db)
 		if (db < required_db) {
 			last_db = db;
 			last_secs = secs;
+			have_last = true;
 			continue;
 		}
 
 		/* If required db < any stored value, use the least. */
-		if (isnan(last_db)) {
+		if (!have_last)
 			return secs;
-		}
 
 		/* Finally, interpolate linearly. */
 		secs = last_secs + (required_db - last_db) * (secs - last_secs) / (db - last_db);
 		return secs;
 	}
+
+	return -1;
 }
 
-unsigned cross_fade_calc(float duration, float total_time,
-			 float mixramp_db, float mixramp_delay,
-			 float replay_gain_db, float replay_gain_prev_db,
-			 char *mixramp_start, char *mixramp_prev_end,
-			 const struct audio_format *af,
-			 const struct audio_format *old_format,
-			 unsigned max_chunks)
+unsigned
+CrossFadeSettings::Calculate(float total_time,
+			     float replay_gain_db, float replay_gain_prev_db,
+			     const char *mixramp_start, const char *mixramp_prev_end,
+			     const AudioFormat af,
+			     const AudioFormat old_format,
+			     unsigned max_chunks) const
 {
 	unsigned int chunks = 0;
 	float chunks_f;
-	float mixramp_overlap;
 
 	if (duration < 0 || duration >= total_time ||
 	    /* we can't crossfade when the audio formats are different */
-	    !audio_format_equals(af, old_format))
+	    af != old_format)
 		return 0;
 
 	assert(duration >= 0);
-	assert(audio_format_valid(af));
+	assert(af.IsValid());
 
-	chunks_f = (float)audio_format_time_to_size(af) / (float)CHUNK_SIZE;
+	chunks_f = (float)af.GetTimeToSize() / (float)CHUNK_SIZE;
 
-	if (isnan(mixramp_delay) || !(mixramp_start) || !(mixramp_prev_end)) {
+	if (mixramp_delay <= 0 || !mixramp_start || !mixramp_prev_end) {
 		chunks = (chunks_f * duration + 0.5);
 	} else {
 		/* Calculate mixramp overlap. */
-		mixramp_overlap = mixramp_interpolate(mixramp_start, mixramp_db - replay_gain_db)
-		  + mixramp_interpolate(mixramp_prev_end, mixramp_db - replay_gain_prev_db);
-		if (!isnan(mixramp_overlap) && (mixramp_delay <= mixramp_overlap)) {
+		const float mixramp_overlap_current =
+			mixramp_interpolate(mixramp_start,
+					    mixramp_db - replay_gain_db);
+		const float mixramp_overlap_prev =
+			mixramp_interpolate(mixramp_prev_end,
+					    mixramp_db - replay_gain_prev_db);
+		const float mixramp_overlap =
+			mixramp_overlap_current + mixramp_overlap_prev;
+
+		if (mixramp_overlap_current >= 0 &&
+		    mixramp_overlap_prev >= 0 &&
+		    mixramp_delay <= mixramp_overlap) {
 			chunks = (chunks_f * (mixramp_overlap - mixramp_delay));
-			g_debug("will overlap %d chunks, %fs", chunks,
-				mixramp_overlap - mixramp_delay);
+			FormatDebug(cross_fade_domain,
+				    "will overlap %d chunks, %fs", chunks,
+				    mixramp_overlap - mixramp_delay);
 		}
 	}
 
 	if (chunks > max_chunks) {
 		chunks = max_chunks;
-		g_warning("audio_buffer_size too small for computed MixRamp overlap");
+		LogWarning(cross_fade_domain,
+			   "audio_buffer_size too small for computed MixRamp overlap");
 	}
 
 	return chunks;

src/CrossFade.hxx

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_CROSSFADE_HXX
+#define MPD_CROSSFADE_HXX
+
+#include "Compiler.h"
+
+struct AudioFormat;
+
+struct CrossFadeSettings {
+	/**
+	 * The configured cross fade duration [s].
+	 */
+	float duration;
+
+	float mixramp_db;
+
+	/**
+	 * The configured MixRapm delay [s].  A non-positive value
+	 * disables MixRamp.
+	 */
+	float mixramp_delay;
+
+	CrossFadeSettings()
+		:duration(0),
+		 mixramp_db(0),
+		 mixramp_delay(-1)
+	{}
+
+
+	/**
+	 * Calculate how many music pipe chunks should be used for crossfading.
+	 *
+	 * @param total_time total_time the duration of the new song
+	 * @param replay_gain_db the ReplayGain adjustment used for this song
+	 * @param replay_gain_prev_db the ReplayGain adjustment used on the last song
+	 * @param mixramp_start the next songs mixramp_start tag
+	 * @param mixramp_prev_end the last songs mixramp_end setting
+	 * @param af the audio format of the new song
+	 * @param old_format the audio format of the current song
+	 * @param max_chunks the maximum number of chunks
+	 * @return the number of chunks for crossfading, or 0 if cross fading
+	 * should be disabled for this song change
+	 */
+	gcc_pure
+	unsigned Calculate(float total_time,
+			   float replay_gain_db, float replay_gain_prev_db,
+			   const char *mixramp_start,
+			   const char *mixramp_prev_end,
+			   AudioFormat af, AudioFormat old_format,
+			   unsigned max_chunks) const;
+};
+
+#endif

src/Daemon.cxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -18,14 +18,18 @@
  */
 
 #include "config.h"
-#include "daemon.h"
+#include "Daemon.hxx"
+#include "system/FatalError.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "fs/FileSystem.hxx"
+#include "util/Domain.hxx"
+#include "Log.hxx"
 
 #include <glib.h>
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <errno.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -37,8 +41,7 @@
 #include <grp.h>
 #endif
 
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN "daemon"
+static constexpr Domain daemon_domain("daemon");
 
 #ifndef WIN32
 
@@ -49,10 +52,10 @@ static char *user_name;
 static uid_t user_uid = (uid_t)-1;
 
 /** the Unix group id which MPD runs as */
-static gid_t user_gid = (pid_t)-1;
+static gid_t user_gid = (gid_t)-1;
 
 /** the absolute path of the pidfile */
-static char *pidfile;
+static AllocatedPath pidfile = AllocatedPath::Null();
 
 /* whether "group" conf. option was given */
 static bool had_group = false;
@@ -64,24 +67,27 @@ daemonize_kill(void)
 	FILE *fp;
 	int pid, ret;
 
-	if (pidfile == NULL)
-		MPD_ERROR("no pid_file specified in the config file");
+	if (pidfile.IsNull())
+		FatalError("no pid_file specified in the config file");
 
-	fp = fopen(pidfile, "r");
-	if (fp == NULL)
-		MPD_ERROR("unable to open pid file \"%s\": %s",
-			  pidfile, g_strerror(errno));
+	fp = FOpen(pidfile, "r");
+	if (fp == nullptr) {
+		const std::string utf8 = pidfile.ToUTF8();
+		FormatFatalSystemError("Unable to open pid file \"%s\"",
+				       utf8.c_str());
+	}
 
 	if (fscanf(fp, "%i", &pid) != 1) {
-		MPD_ERROR("unable to read the pid from file \"%s\"",
-			  pidfile);
+		const std::string utf8 = pidfile.ToUTF8();
+		FormatFatalError("unable to read the pid from file \"%s\"",
+				 utf8.c_str());
 	}
 	fclose(fp);
 
 	ret = kill(pid, SIGTERM);
 	if (ret < 0)
-		MPD_ERROR("unable to kill proccess %i: %s",
-			  pid, g_strerror(errno));
+		FormatFatalSystemError("unable to kill process %i",
+				       int(pid));
 
 	exit(EXIT_SUCCESS);
 }
@@ -96,33 +102,36 @@ daemonize_close_stdin(void)
 void
 daemonize_set_user(void)
 {
-	if (user_name == NULL)
+	if (user_name == nullptr)
 		return;
 
 	/* set gid */
-	if (user_gid != (gid_t)-1 && user_gid != getgid()) {
-		if (setgid(user_gid) == -1) {
-			MPD_ERROR("cannot setgid to %d: %s",
-				  (int)user_gid, g_strerror(errno));
-		}
+	if (user_gid != (gid_t)-1 && user_gid != getgid() &&
+	    setgid(user_gid) == -1) {
+		FormatFatalSystemError("Failed to set group %d",
+				       (int)user_gid);
 	}
 
 #ifdef _BSD_SOURCE
-	/* init suplementary groups
+	/* init supplementary groups
 	 * (must be done before we change our uid)
 	 */
-	if (!had_group && initgroups(user_name, user_gid) == -1) {
-		g_warning("cannot init supplementary groups "
-			  "of user \"%s\": %s",
-			  user_name, g_strerror(errno));
+	if (!had_group &&
+	    /* no need to set the new user's supplementary groups if
+	       we are already this user */
+	    user_uid != getuid() &&
+	    initgroups(user_name, user_gid) == -1) {
+		FormatFatalSystemError("Failed to set supplementary groups "
+				       "of user \"%s\"",
+				       user_name);
 	}
 #endif
 
 	/* set uid */
 	if (user_uid != (uid_t)-1 && user_uid != getuid() &&
 	    setuid(user_uid) == -1) {
-		MPD_ERROR("cannot change to uid of user \"%s\": %s",
-			  user_name, g_strerror(errno));
+		FormatFatalSystemError("Failed to set user \"%s\"",
+				       user_name);
 	}
 }
 
@@ -131,12 +140,12 @@ daemonize_detach(void)
 {
 	/* flush all file handles before duplicating the buffers */
 
-	fflush(NULL);
+	fflush(nullptr);
 
 #ifdef HAVE_DAEMON
 
 	if (daemon(0, 1))
-		MPD_ERROR("daemon() failed: %s", g_strerror(errno));
+		FatalSystemError("daemon() failed");
 
 #elif defined(HAVE_FORK)
 
@@ -144,7 +153,7 @@ daemonize_detach(void)
 
 	switch (fork()) {
 	case -1:
-		MPD_ERROR("fork() failed: %s", g_strerror(errno));
+		FatalSystemError("fork() failed");
 	case 0:
 		break;
 	default:
@@ -155,52 +164,53 @@ daemonize_detach(void)
 	/* release the current working directory */
 
 	if (chdir("/") < 0)
-		MPD_ERROR("problems changing to root directory");
+		FatalError("problems changing to root directory");
 
 	/* detach from the current session */
 
 	setsid();
 
 #else
-	MPD_ERROR("no support for daemonizing");
+	FatalError("no support for daemonizing");
 #endif
 
-	g_debug("daemonized!");
+	LogDebug(daemon_domain, "daemonized");
 }
 
 void
 daemonize(bool detach)
 {
-	FILE *fp = NULL;
+	FILE *fp = nullptr;
 
-	if (pidfile != NULL) {
+	if (!pidfile.IsNull()) {
 		/* do this before daemon'izing so we can fail gracefully if we can't
 		 * write to the pid file */
-		g_debug("opening pid file");
-		fp = fopen(pidfile, "w+");
+		LogDebug(daemon_domain, "opening pid file");
+		fp = FOpen(pidfile, "w+");
 		if (!fp) {
-			MPD_ERROR("could not create pid file \"%s\": %s",
-				  pidfile, g_strerror(errno));
+			const std::string utf8 = pidfile.ToUTF8();
+			FormatFatalSystemError("Failed to create pid file \"%s\"",
+					       pidfile.c_str());
 		}
 	}
 
 	if (detach)
 		daemonize_detach();
 
-	if (pidfile != NULL) {
-		g_debug("writing pid file");
+	if (!pidfile.IsNull()) {
+		LogDebug(daemon_domain, "writing pid file");
 		fprintf(fp, "%lu\n", (unsigned long)getpid());
 		fclose(fp);
 	}
 }
 
 void
-daemonize_init(const char *user, const char *group, const char *_pidfile)
+daemonize_init(const char *user, const char *group, AllocatedPath &&_pidfile)
 {
 	if (user) {
 		struct passwd *pwd = getpwnam(user);
-		if (!pwd)
-			MPD_ERROR("no such user \"%s\"", user);
+		if (pwd == nullptr)
+			FormatFatalError("no such user \"%s\"", user);
 
 		user_uid = pwd->pw_uid;
 		user_gid = pwd->pw_gid;
@@ -212,25 +222,26 @@ daemonize_init(const char *user, const char *group, const char *_pidfile)
 	}
 
 	if (group) {
-		struct group *grp = grp = getgrnam(group);
-		if (!grp)
-			MPD_ERROR("no such group \"%s\"", group);
+		struct group *grp = getgrnam(group);
+		if (grp == nullptr)
+			FormatFatalError("no such group \"%s\"", group);
 		user_gid = grp->gr_gid;
 		had_group = true;
 	}
 
 
-	pidfile = g_strdup(_pidfile);
+	pidfile = std::move(_pidfile);
 }
 
 void
 daemonize_finish(void)
 {
-	if (pidfile != NULL)
-		unlink(pidfile);
+	if (!pidfile.IsNull()) {
+		RemoveFile(pidfile);
+		pidfile = AllocatedPath::Null();
+	}
 
 	g_free(user_name);
-	g_free(pidfile);
 }
 
 #endif

src/Daemon.hxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -17,19 +17,17 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#ifndef DAEMON_H
-#define DAEMON_H
+#ifndef MPD_DAEMON_HXX
+#define MPD_DAEMON_HXX
 
-#include "mpd_error.h"
-
-#include <stdbool.h>
+class AllocatedPath;
 
 #ifndef WIN32
 void
-daemonize_init(const char *user, const char *group, const char *pidfile);
+daemonize_init(const char *user, const char *group, AllocatedPath &&pidfile);
 #else
 static inline void
-daemonize_init(const char *user, const char *group, const char *pidfile)
+daemonize_init(const char *user, const char *group, AllocatedPath &&pidfile)
 { (void)user; (void)group; (void)pidfile; }
 #endif
 
@@ -50,10 +48,12 @@ daemonize_finish(void)
 void
 daemonize_kill(void);
 #else
-#include <glib.h>
+#include "system/FatalError.hxx"
 static inline void
 daemonize_kill(void)
-{ MPD_ERROR("--kill is not available on WIN32"); }
+{
+	FatalError("--kill is not available on WIN32");
+}
 #endif
 
 /**

src/DatabaseError.cxx

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "DatabaseError.hxx"
+#include "util/Domain.hxx"
+
+const Domain db_domain("db");

src/DatabaseError.hxx

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_DB_ERROR_HXX
+#define MPD_DB_ERROR_HXX
+
+class Domain;
+
+enum db_error {
+	/**
+	 * The database is disabled, i.e. none is configured in this
+	 * MPD instance.
+	 */
+	DB_DISABLED,
+
+	DB_NOT_FOUND,
+};
+
+extern const Domain db_domain;
+
+#endif

src/DatabaseGlue.cxx

@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "DatabaseGlue.hxx"
+#include "DatabaseSimple.hxx"
+#include "DatabaseRegistry.hxx"
+#include "DatabaseSave.hxx"
+#include "DatabaseError.hxx"
+#include "Directory.hxx"
+#include "util/Error.hxx"
+#include "ConfigData.hxx"
+#include "Stats.hxx"
+#include "DatabasePlugin.hxx"
+#include "db/SimpleDatabasePlugin.hxx"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+
+
+static Database *db;
+static bool db_is_open;
+static bool is_simple;
+
+bool
+DatabaseGlobalInit(const config_param &param, Error &error)
+{
+	assert(db == nullptr);
+	assert(!db_is_open);
+
+	const char *plugin_name =
+		param.GetBlockValue("plugin", "simple");
+	is_simple = strcmp(plugin_name, "simple") == 0;
+
+	const DatabasePlugin *plugin = GetDatabasePluginByName(plugin_name);
+	if (plugin == nullptr) {
+		error.Format(db_domain,
+			     "No such database plugin: %s", plugin_name);
+		return false;
+	}
+
+	db = plugin->create(param, error);
+	return db != nullptr;
+}
+
+void
+DatabaseGlobalDeinit(void)
+{
+	if (db_is_open)
+		db->Close();
+
+	if (db != nullptr)
+		delete db;
+}
+
+const Database *
+GetDatabase()
+{
+	assert(db == nullptr || db_is_open);
+
+	return db;
+}
+
+const Database *
+GetDatabase(Error &error)
+{
+	assert(db == nullptr || db_is_open);
+
+	if (db == nullptr)
+		error.Set(db_domain, DB_DISABLED, "No database");
+
+	return db;
+}
+
+bool
+db_is_simple(void)
+{
+	assert(db == nullptr || db_is_open);
+
+	return is_simple;
+}
+
+Directory *
+db_get_root(void)
+{
+	assert(db != nullptr);
+	assert(db_is_simple());
+
+	return ((SimpleDatabase *)db)->GetRoot();
+}
+
+Directory *
+db_get_directory(const char *name)
+{
+	if (db == nullptr)
+		return nullptr;
+
+	Directory *music_root = db_get_root();
+	if (name == nullptr)
+		return music_root;
+
+	return music_root->LookupDirectory(name);
+}
+
+bool
+db_save(Error &error)
+{
+	assert(db != nullptr);
+	assert(db_is_open);
+	assert(db_is_simple());
+
+	return ((SimpleDatabase *)db)->Save(error);
+}
+
+bool
+DatabaseGlobalOpen(Error &error)
+{
+	assert(db != nullptr);
+	assert(!db_is_open);
+
+	if (!db->Open(error))
+		return false;
+
+	db_is_open = true;
+
+	stats_update();
+
+	return true;
+}
+
+bool
+db_exists()
+{
+	assert(db != nullptr);
+	assert(db_is_open);
+	assert(db_is_simple());
+
+	return ((SimpleDatabase *)db)->GetUpdateStamp() > 0;
+}

src/DatabaseGlue.hxx

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_DATABASE_GLUE_HXX
+#define MPD_DATABASE_GLUE_HXX
+
+#include "Compiler.h"
+
+struct config_param;
+class Database;
+class Error;
+
+/**
+ * Initialize the database library.
+ *
+ * @param param the database configuration block
+ */
+bool
+DatabaseGlobalInit(const config_param &param, Error &error);
+
+void
+DatabaseGlobalDeinit(void);
+
+bool
+DatabaseGlobalOpen(Error &error);
+
+/**
+ * Returns the global #Database instance.  May return nullptr if this MPD
+ * configuration has no database (no music_directory was configured).
+ */
+gcc_pure
+const Database *
+GetDatabase();
+
+/**
+ * Returns the global #Database instance.  May return nullptr if this MPD
+ * configuration has no database (no music_directory was configured).
+ */
+gcc_pure
+const Database *
+GetDatabase(Error &error);
+
+#endif

src/DatabaseHelpers.cxx

@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "DatabaseHelpers.hxx"
+#include "DatabasePlugin.hxx"
+#include "Song.hxx"
+#include "tag/Tag.hxx"
+
+#include <functional>
+#include <set>
+
+#include <string.h>
+
+struct StringLess {
+	gcc_pure
+	bool operator()(const char *a, const char *b) const {
+		return strcmp(a, b) < 0;
+	}
+};
+
+typedef std::set<const char *, StringLess> StringSet;
+
+static bool
+CollectTags(StringSet &set, TagType tag_type, Song &song)
+{
+	Tag *tag = song.tag;
+	if (tag == nullptr)
+		return true;
+
+	bool found = false;
+	for (unsigned i = 0; i < tag->num_items; ++i) {
+		if (tag->items[i]->type == tag_type) {
+			set.insert(tag->items[i]->value);
+			found = true;
+		}
+	}
+
+	if (!found)
+		set.insert("");
+
+	return true;
+}
+
+bool
+VisitUniqueTags(const Database &db, const DatabaseSelection &selection,
+		TagType tag_type,
+		VisitString visit_string,
+		Error &error)
+{
+	StringSet set;
+
+	using namespace std::placeholders;
+	const auto f = std::bind(CollectTags, std::ref(set), tag_type, _1);
+	if (!db.Visit(selection, f, error))
+		return false;
+
+	for (auto value : set)
+		if (!visit_string(value, error))
+			return false;
+
+	return true;
+}
+
+static void
+StatsVisitTag(DatabaseStats &stats, StringSet &artists, StringSet &albums,
+	      const Tag &tag)
+{
+	if (tag.time > 0)
+		stats.total_duration += tag.time;
+
+	for (unsigned i = 0; i < tag.num_items; ++i) {
+		const TagItem &item = *tag.items[i];
+
+		switch (item.type) {
+		case TAG_ARTIST:
+			artists.insert(item.value);
+			break;
+
+		case TAG_ALBUM:
+			albums.insert(item.value);
+			break;
+
+		default:
+			break;
+		}
+	}
+}
+
+static bool
+StatsVisitSong(DatabaseStats &stats, StringSet &artists, StringSet &albums,
+	       Song &song)
+{
+	++stats.song_count;
+
+	if (song.tag != nullptr)
+		StatsVisitTag(stats, artists, albums, *song.tag);
+
+	return true;
+}
+
+bool
+GetStats(const Database &db, const DatabaseSelection &selection,
+	 DatabaseStats &stats, Error &error)
+{
+	stats.Clear();
+
+	StringSet artists, albums;
+	using namespace std::placeholders;
+	const auto f = std::bind(StatsVisitSong,
+				 std::ref(stats), std::ref(artists),
+				 std::ref(albums), _1);
+	if (!db.Visit(selection, f, error))
+		return false;
+
+	stats.artist_count = artists.size();
+	stats.album_count = albums.size();
+	return true;
+}

src/DatabaseHelpers.hxx

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_MEMORY_DATABASE_PLUGIN_HXX
+#define MPD_MEMORY_DATABASE_PLUGIN_HXX
+
+#include "DatabaseVisitor.hxx"
+#include "tag/TagType.h"
+#include "Compiler.h"
+
+class Error;
+class Database;
+struct DatabaseSelection;
+struct DatabaseStats;
+
+bool
+VisitUniqueTags(const Database &db, const DatabaseSelection &selection,
+		TagType tag_type,
+		VisitString visit_string,
+		Error &error);
+
+bool
+GetStats(const Database &db, const DatabaseSelection &selection,
+	 DatabaseStats &stats, Error &error);
+
+#endif

src/DatabaseLock.cxx

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "DatabaseLock.hxx"
+#include "Compiler.h"
+
+Mutex db_mutex;
+
+#ifndef NDEBUG
+ThreadId db_mutex_holder;
+#endif

src/DatabaseLock.hxx

@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/** \file
+ *
+ * Support for locking data structures from the database, for safe
+ * multi-threading.
+ */
+
+#ifndef MPD_DB_LOCK_HXX
+#define MPD_DB_LOCK_HXX
+
+#include "check.h"
+#include "thread/Mutex.hxx"
+#include "Compiler.h"
+
+#include <assert.h>
+
+extern Mutex db_mutex;
+
+#ifndef NDEBUG
+
+#include "thread/Id.hxx"
+
+extern ThreadId db_mutex_holder;
+
+/**
+ * Does the current thread hold the database lock?
+ */
+gcc_pure
+static inline bool
+holding_db_lock(void)
+{
+	return db_mutex_holder.IsInside();
+}
+
+#endif
+
+/**
+ * Obtain the global database lock.  This is needed before
+ * dereferencing a #song or #directory.  It is not recursive.
+ */
+static inline void
+db_lock(void)
+{
+	assert(!holding_db_lock());
+
+	db_mutex.lock();
+
+	assert(db_mutex_holder.IsNull());
+#ifndef NDEBUG
+	db_mutex_holder = ThreadId::GetCurrent();
+#endif
+}
+
+/**
+ * Release the global database lock.
+ */
+static inline void
+db_unlock(void)
+{
+	assert(holding_db_lock());
+#ifndef NDEBUG
+	db_mutex_holder = ThreadId::Null();
+#endif
+
+	db_mutex.unlock();
+}
+
+class ScopeDatabaseLock {
+public:
+	ScopeDatabaseLock() {
+		db_lock();
+	}
+
+	~ScopeDatabaseLock() {
+		db_unlock();
+	}
+};
+
+#endif