release v0.19.21

The user unit omits the "ProtectKernelModules" setting which fails
with modular kernels:

 Failed at step CAPABILITIES spawning /usr/bin/mpd: Operation not permitted

It is unfortunate that systemd (version 232) is unable to reduce its
own capabilities, because this requires us to split system and user
units.

 https://bugs.musicpd.org/view.php?id=4608

.gitignore

@@ -35,7 +35,7 @@ tags
 /mkinstalldirs
 /build
 /src/mpd
-/systemd/mpd.service
+/systemd/system/mpd.service
 /stamp-h1
 
 /src/dsd2pcm/dsd2pcm

INSTALL

@@ -12,7 +12,7 @@ install MPD.  If more information is desired, read the user manual:
 Dependencies
 ------------
 
-gcc 4.6 or later - http://gcc.gnu.org/
+gcc 4.7 or later - http://gcc.gnu.org/
 clang 3.2 or later - http://clang.llvm.org/
 Any other C++11 compliant compiler should also work.
 

Makefile.am

@@ -359,6 +359,7 @@ libutil_a_SOURCES = \
 	src/util/Clamp.hxx \
 	src/util/Alloc.cxx src/util/Alloc.hxx \
 	src/util/VarSize.hxx \
+	src/util/ScopeExit.hxx \
 	src/util/Error.cxx src/util/Error.hxx \
 	src/util/Domain.hxx \
 	src/util/ReusableArray.hxx \
@@ -462,11 +463,13 @@ ICU_LDADD = libicu.a $(ICU_LIBS)
 libpcm_a_SOURCES = \
 	src/pcm/Domain.cxx src/pcm/Domain.hxx \
 	src/pcm/Traits.hxx \
+	src/pcm/Interleave.cxx src/pcm/Interleave.hxx \
 	src/pcm/PcmBuffer.cxx src/pcm/PcmBuffer.hxx \
 	src/pcm/PcmExport.cxx src/pcm/PcmExport.hxx \
 	src/pcm/PcmConvert.cxx src/pcm/PcmConvert.hxx \
 	src/pcm/PcmDop.cxx src/pcm/PcmDop.hxx \
 	src/pcm/Volume.cxx src/pcm/Volume.hxx \
+	src/pcm/Silence.cxx src/pcm/Silence.hxx \
 	src/pcm/PcmMix.cxx src/pcm/PcmMix.hxx \
 	src/pcm/PcmChannels.cxx src/pcm/PcmChannels.hxx \
 	src/pcm/PcmPack.cxx src/pcm/PcmPack.hxx \
@@ -527,7 +530,7 @@ libfs_a_SOURCES = \
 	src/fs/Traits.cxx src/fs/Traits.hxx \
 	src/fs/Config.cxx src/fs/Config.hxx \
 	src/fs/Charset.cxx src/fs/Charset.hxx \
-	src/fs/Path.cxx src/fs/Path.hxx \
+	src/fs/Path.cxx src/fs/Path2.cxx src/fs/Path.hxx \
 	src/fs/AllocatedPath.cxx src/fs/AllocatedPath.hxx \
 	src/fs/FileSystem.cxx src/fs/FileSystem.hxx \
 	src/fs/StandardDirectory.cxx src/fs/StandardDirectory.hxx \
@@ -798,6 +801,11 @@ endif
 if HAVE_FFMPEG
 noinst_LIBRARIES += libffmpeg.a
 libffmpeg_a_SOURCES = \
+	src/lib/ffmpeg/Init.cxx src/lib/ffmpeg/Init.hxx \
+	src/lib/ffmpeg/Time.hxx \
+	src/lib/ffmpeg/Buffer.hxx \
+	src/lib/ffmpeg/LogError.cxx src/lib/ffmpeg/LogError.hxx \
+	src/lib/ffmpeg/LogCallback.cxx src/lib/ffmpeg/LogCallback.hxx \
 	src/lib/ffmpeg/Error.cxx src/lib/ffmpeg/Error.hxx \
 	src/lib/ffmpeg/Domain.cxx src/lib/ffmpeg/Domain.hxx
 libffmpeg_a_CPPFLAGS = $(AM_CPPFLAGS) \
@@ -979,6 +987,8 @@ endif
 
 if HAVE_FFMPEG
 libdecoder_a_SOURCES += \
+	src/decoder/plugins/FfmpegIo.cxx \
+	src/decoder/plugins/FfmpegIo.hxx \
 	src/decoder/plugins/FfmpegMetaData.cxx \
 	src/decoder/plugins/FfmpegMetaData.hxx \
 	src/decoder/plugins/FfmpegDecoderPlugin.cxx \
@@ -1439,8 +1449,13 @@ FILTER_LIBS = \
 
 if HAVE_SYSTEMD
 systemdsystemunit_DATA = \
-	systemd/mpd.socket \
-	systemd/mpd.service
+	systemd/system/mpd.socket \
+	systemd/system/mpd.service
+endif
+
+if HAVE_SYSTEMD_USER
+systemduserunit_DATA = \
+	systemd/user/mpd.service
 endif
 
 
@@ -1866,6 +1881,7 @@ test_run_convert_SOURCES = test/run_convert.cxx \
 	src/AudioParser.cxx
 test_run_convert_LDADD = \
 	$(PCM_LIBS) \
+	libconf.a \
 	libutil.a \
 	$(GLIB_LIBS)
 
@@ -2109,7 +2125,9 @@ developer_DATA = $(wildcard doc/developer/*.html)
 
 DOCBOOK_HTML = $(patsubst %.xml,%/index.html,$(DOCBOOK_FILES))
 
-$(DOCBOOK_HTML): %/index.html: %.xml
+DOCBOOK_INCLUDES = $(wildcard $(srcdir)/doc/include/*.xml)
+
+$(DOCBOOK_HTML): %/index.html: %.xml $(DOCBOOK_INCLUDES)
 	$(XMLTO) -o $(@D) --stringparam chunker.output.encoding=utf-8 html --stringparam use.id.as.filename=1 $<
 
 doc/api/html/index.html: doc/doxygen.conf
@@ -2150,9 +2168,10 @@ EXTRA_DIST = $(doc_DATA) autogen.sh \
 	test/test_archive_bzip2.sh  \
 	test/test_archive_iso9660.sh \
 	test/test_archive_zzip.sh \
-	$(wildcard scripts/*.sh) \
+	$(wildcard $(srcdir)/scripts/*.rb) \
 	$(man_MANS) $(DOCBOOK_FILES) doc/mpdconf.example doc/doxygen.conf \
-	systemd/mpd.socket \
+	$(wildcard $(srcdir)/doc/include/*.xml) \
+	systemd/system/mpd.socket \
 	android/AndroidManifest.xml \
 	android/build.py \
 	android/custom_rules.xml \

NEWS

@@ -1,3 +1,78 @@
+ver 0.19.21 (2016/12/13)
+* decoder
+  - ffmpeg: fix crash bug
+* fix unit test failure after recent "setprio" change
+* systemd: add user unit
+
+ver 0.19.20 (2016/12/09)
+* protocol
+  - "setprio" re-enqueues old song if priority has been raised
+* decoder
+  - ffmpeg: ignore empty packets
+  - pcm: fix corruption bug with partial frames (after short read)
+  - sidplay: fix playback speed with libsidplayfp
+* output
+  - winmm: fix 8 bit playback
+* fix gcc 7.0 -Wimplicit-fallthrough
+* systemd: paranoid security settings
+
+ver 0.19.19 (2016/08/23)
+* decoder
+  - ffmpeg: bug fix for FFmpeg 3.1 support
+  - wildmidi: support libWildMidi 0.4
+* output
+  - pulse: support 32 bit, 24 bit and floating point playback
+* support non-x86 NetBSD
+* fix clang 3.9 warnings
+
+ver 0.19.18 (2016/08/05)
+* decoder
+  - ffmpeg: fix crash with older FFmpeg versions (< 3.0)
+  - ffmpeg: log detailed error message
+  - ffmpeg: support FFmpeg 3.1
+  - sidplay: detect libsidplay2 with pkg-config
+  - sidplay: log detailed error message
+  - sidplay: read the "date" tag
+  - sidplay: allow building with libsidplayfp instead of libsidplay2
+* output
+  - shout: recognize setting "encoder" instead of "encoding"
+* fix memory leak after stream failure
+* fix build failure with Boost 1.61
+* require gcc 4.7 or newer
+
+ver 0.19.17 (2016/07/09)
+* decoder
+  - flac: fix assertion failure while seeking
+  - flac: fix stream duration indicator
+  - fix seek problems in several plugins
+* fix spurious seek error "Failed to allocate silence buffer"
+* replay gain: fix "replay_gain_handler mixer" setting
+* DSD: use 0x69 as silence pattern
+* fix use-after-free bug on "close" and "kill"
+
+ver 0.19.16 (2016/06/13)
+* faster seeking
+* fix system include path order
+* add missing DocBook file to tarball
+
+ver 0.19.15 (2016/04/30)
+* decoder
+  - ffmpeg: support FFmpeg 3.0
+  - ffmpeg: use as fallback instead of "mad" if no plugin matches
+  - opus: support bigger OpusTags packets
+* fix more build failures on non-glibc builds due to constexpr Mutex
+* fix build failure due to missing include
+* fix unit test on Alpha
+
+ver 0.19.14 (2016/03/18)
+* decoder
+  - dsdiff: fix off-by-one buffer overflow
+  - opus: limit tag size to 64 kB
+* archive
+  - iso9660: fix buffer overflow
+* fix quadratic runtime bug in the tag pool
+* fix build failures on non-glibc builds due to constexpr Mutex
+
 ver 0.19.13 (2016/02/23)
 * tags
   - aiff, riff: fix ID3 chunk padding

configure.ac

@@ -1,10 +1,10 @@
 AC_PREREQ(2.60)
 
-AC_INIT(mpd, 0.19.13, musicpd-dev-team@lists.sourceforge.net)
+AC_INIT(mpd, 0.19.21, musicpd-dev-team@lists.sourceforge.net)
 
 VERSION_MAJOR=0
 VERSION_MINOR=19
-VERSION_REVISION=13
+VERSION_REVISION=21
 VERSION_EXTRA=0
 
 AC_CONFIG_SRCDIR([src/Main.cxx])
@@ -52,6 +52,22 @@ if test "x$with_systemdsystemunitdir" != xno; then
 fi
 AM_CONDITIONAL(HAVE_SYSTEMD, [test -n "$with_systemdsystemunitdir" -a "x$with_systemdsystemunitdir" != xno ])
 
+AC_ARG_WITH([systemduserunitdir],
+	    AS_HELP_STRING([--with-systemduserunitdir=DIR], [Directory for systemd service files]),
+	    [], [with_systemduserunitdir=no])
+if test "x$with_systemduserunitdir" = xyes; then
+	AC_MSG_CHECKING(for systemd)
+	with_systemduserunitdir=$($PKG_CONFIG --variable=systemduserunitdir systemd)
+	if test -z "$with_systemduserunitdir"; then
+		AC_MSG_ERROR([Failed to detect systemd])
+	fi
+	AC_MSG_RESULT([$with_systemduserunitdir])
+fi
+if test "x$with_systemduserunitdir" != xno; then
+	AC_SUBST([systemduserunitdir], [$with_systemduserunitdir])
+fi
+AM_CONDITIONAL(HAVE_SYSTEMD_USER, [test -n "$with_systemduserunitdir" -a "x$with_systemduserunitdir" != xno ])
+
 dnl ---------------------------------------------------------------------------
 dnl Declare Variables
 dnl ---------------------------------------------------------------------------
@@ -542,8 +558,6 @@ AC_ARG_ENABLE(sidplay,
 	AS_HELP_STRING([--enable-sidplay],
 		[enable C64 SID support via libsidplay2]),,
 	enable_sidplay=auto)
-MPD_DEPENDS([enable_sidplay], [enable_glib],
-	[Cannot use --enable-sidplay with --disable-glib])
 
 AC_ARG_ENABLE(shine-encoder,
 	AS_HELP_STRING([--enable-shine-encoder],
@@ -703,12 +717,6 @@ AC_ARG_ENABLE(glib,
 if test x$enable_glib = xyes; then
 	PKG_CHECK_MODULES([GLIB], [glib-2.0 >= 2.28 gthread-2.0],,
 		[AC_MSG_ERROR([GLib 2.28 is required])])
-
-	if test x$GCC = xyes; then
-		# suppress warnings in the GLib headers
-		GLIB_CFLAGS=`echo $GLIB_CFLAGS |sed -e 's,-I/,-isystem /,g'`
-	fi
-
 	AC_DEFINE(HAVE_GLIB, 1, [Define if GLib is used])
 fi
 AM_CONDITIONAL(HAVE_GLIB, test x$enable_glib = xyes)
@@ -1341,31 +1349,36 @@ AM_CONDITIONAL(ENABLE_VORBIS_DECODER, test x$enable_vorbis = xyes || test x$enab
 
 dnl --------------------------------- sidplay ---------------------------------
 if test x$enable_sidplay != xno; then
-	# we're not using pkg-config here
-	# because libsidplay2's .pc file requires libtool
-	AC_CHECK_LIB([sidplay2],[main],[found_sidplay=yes],[found_sidplay=no],[])
+	dnl Check for libsidplayfp first
+	PKG_CHECK_MODULES([SIDPLAY], [libsidplayfp libsidutils],
+		[found_sidplayfp=yes],
+		[found_sidplayfp=no])
+	found_sidplay=$found_sidplayfp
+fi
+
+if test x$enable_sidplay != xno && test x$found_sidplayfp = xno; then
+	PKG_CHECK_MODULES([SIDPLAY], [libsidplay2 libsidutils],
+		[found_sidplay=yes],
+		[found_sidplay=no])
 
 	MPD_AUTO_PRE(sidplay, [sidplay decoder plugin],
 		[libsidplay2 not found])
 fi
 
-if test x$enable_sidplay != xno; then
+if test x$enable_sidplay != xno && test x$found_sidplayfp = xno; then
 	AC_CHECK_LIB([resid-builder], [main],
 		[found_sidplay=yes], [found_sidplay=no])
 
-	if test x$found_sidplay = xyes; then
-		AC_CHECK_LIB([sidutils],[main],[:],[found_sidplay=no],[])
-	fi
-
 	MPD_AUTO_RESULT(sidplay, [sidplay decoder plugin],
-		[libresid-builder or libsidutils not found])
+		[libresid-builder not found])
 fi
 
 if test x$enable_sidplay = xyes; then
-	AC_SUBST(SIDPLAY_LIBS,"-lsidplay2 -lresid-builder -lsidutils")
-	AC_SUBST(SIDPLAY_CFLAGS,)
-
+	SIDPLAY_LIBS="$SIDPLAY_LIBS -lresid-builder"
 	AC_DEFINE(ENABLE_SIDPLAY, 1, [Define for libsidplay2 support])
+	if test x$found_sidplayfp = xyes; then
+		AC_DEFINE(HAVE_SIDPLAYFP, 1, [Define if libsidplayfp is used instead of libsidplay2])
+	fi
 fi
 
 AM_CONDITIONAL(ENABLE_SIDPLAY, test x$enable_sidplay = xyes)
@@ -1908,7 +1921,8 @@ dnl Generate files
 dnl ---------------------------------------------------------------------------
 AC_CONFIG_FILES(Makefile)
 AC_CONFIG_FILES(doc/doxygen.conf)
-AC_CONFIG_FILES(systemd/mpd.service)
+AC_CONFIG_FILES(systemd/system/mpd.service)
+AC_CONFIG_FILES(systemd/user/mpd.service)
 AC_OUTPUT
 
 echo 'MPD is ready for compilation, type "make" to begin.'

doc/developer.xml

@@ -1,6 +1,7 @@
 <?xml version='1.0' encoding="utf-8"?>
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-               "docbook/dtd/xml/4.2/docbookx.dtd">
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+                      "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
+
 <book>
   <title>The Music Player Daemon - Developer's Manual</title>
 
@@ -40,7 +41,7 @@
       <listitem>
         <para>
           the code should be C++11 compliant, and must compile with
-          <application>GCC</application> 4.6 and
+          <application>GCC</application> 4.7 and
           <application>clang</application> 3.2
         </para>
       </listitem>

doc/include/tags.xml

@@ -0,0 +1,154 @@
+<?xml version='1.0' encoding="utf-8"?>
+<!DOCTYPE itemizedlist PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+                              "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
+
+<itemizedlist>
+  <listitem>
+    <para>
+      <varname>artist</varname>: the artist name.  Its meaning is not
+      well-defined; see <varname>composer</varname> and
+      <varname>performer</varname> for more specific tags.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>artistsort</varname>: same as
+      <varname>artist</varname>, but for sorting.  This usually omits
+      prefixes such as "The".
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>album</varname>: the album name.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>albumsort</varname>: same as <varname>album</varname>,
+      but for sorting.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>albumartist</varname>: on multi-artist albums, this is
+      the artist name which shall be used for the whole album.  The
+      exact meaning of this tag is not well-defined.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>albumartistsort</varname>: same as
+      <varname>albumartist</varname>, but for sorting.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>title</varname>: the song title.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>track</varname>: the track number within the album.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>name</varname>: a name for this song.  This is not the
+      song title.  The exact meaning of this tag is not well-defined.
+      It is often used by badly configured internet radio stations
+      with broken tags to squeeze both the artist name and the song
+      title in one tag.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>genre</varname>: the music genre.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>date</varname>: the song's release date.  This is
+      usually a 4-digit year.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>composer</varname>: the artist who composed the song.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>performer</varname>: the artist who performed the song.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>comment</varname>: a human-readable comment about this
+      song.  The exact meaning of this tag is not well-defined.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>disc</varname>: the disc number in a multi-disc album.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>musicbrainz_artistid</varname>: the artist id in the
+      <ulink
+      url="http://musicbrainz.org/doc/MusicBrainzTag">MusicBrainz</ulink>
+      database.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>musicbrainz_albumid</varname>: the album id in the
+      <ulink
+      url="http://musicbrainz.org/doc/MusicBrainzTag">MusicBrainz</ulink>
+      database.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>musicbrainz_albumartistid</varname>: the album artist
+      id in the <ulink
+      url="http://musicbrainz.org/doc/MusicBrainzTag">MusicBrainz</ulink>
+      database.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>musicbrainz_trackid</varname>: the track id in the
+      <ulink
+      url="http://musicbrainz.org/doc/MusicBrainzTag">MusicBrainz</ulink>
+      database.
+    </para>
+  </listitem>
+
+  <listitem>
+    <para>
+      <varname>musicbrainz_releasetrackid</varname>: the release track
+      id in the <ulink
+      url="http://musicbrainz.org/doc/MusicBrainzTag">MusicBrainz</ulink>
+      database.
+    </para>
+  </listitem>
+</itemizedlist>

doc/mpd.conf.5

@@ -174,18 +174,6 @@ MP3 playback.
 This specifies whether relative or absolute paths for song filenames are used
 when saving playlists.  The default is "no".
 .TP
-.B metadata_to_use <tags>
-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, disc,
-musicbrainz_artistid, musicbrainz_albumid, musicbrainz_albumartistid,
-musicbrainz_releasetrackid, 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 whether to support automatic update of music database when
 files are changed in music_directory. The default is to disable autoupdate

doc/mpdconf.example

@@ -115,7 +115,7 @@
 #
 # 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.
+# found in the user manual.
 #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 
@@ -164,7 +164,7 @@
 # Permissions #################################################################
 #
 # If this setting is set, MPD will require password authorization. The password
-# can setting can be specified multiple times for different password profiles.
+# setting can be specified multiple times for different password profiles.
 #
 #password                        "password@read,add,control,admin"
 #
@@ -231,7 +231,7 @@ input {
 #
 #audio_output {
 #	type		"shout"
-#	encoding	"ogg"			# optional
+#	encoder		"vorbis"		# optional
 #	name		"My Shout Stream"
 #	host		"localhost"
 #	port		"8000"

doc/protocol.xml

@@ -1,6 +1,7 @@
 <?xml version='1.0' encoding="utf-8"?>
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-               "docbook/dtd/xml/4.2/docbookx.dtd">
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+                      "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
+
 <book>
   <title>The Music Player Daemon protocol</title>
 
@@ -65,8 +66,8 @@
         <function>strcpy</function> just fine with UTF-8 encoded
         strings. For example: <returnvalue>OK</returnvalue> encoded in
         UTF-8 is simply <returnvalue>OK</returnvalue>.  For more
-        information on UTF=8:
-        http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8)
+        information on UTF-8:
+        <ulink url="http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8"/>)
       </para>
     </section>
 
@@ -201,6 +202,25 @@
         omitted, then the maximum possible value is assumed.
       </para>
     </section>
+
+    <section id="tags">
+      <title>Tags</title>
+
+      <para>
+        The following tags are supported by
+        <application>MPD</application>:
+      </para>
+
+      <xi:include href="include/tags.xml"
+                  xmlns:xi="http://www.w3.org/2001/XInclude"/>
+
+      <para>
+        There can be multiple values for some of these tags.  For
+        example, <application>MPD</application> may return multiple
+        lines with a <varname>performer</varname> tag.  A tag value is
+        a UTF-8 string.
+      </para>
+    </section>
   </chapter>
 
   <chapter id="recipes">

doc/user.xml

@@ -1,6 +1,7 @@
 <?xml version='1.0' encoding="utf-8"?>
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-               "docbook/dtd/xml/4.2/docbookx.dtd">
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+                      "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
+
 <book>
   <title>The Music Player Daemon - User's Manual</title>
 
@@ -16,7 +17,7 @@
       <application>MPD</application> (Music Player Daemon) is, as the
       name suggests, a server software allowing you to remotely play
       your music, handle playlists, deliver music (HTTP streams with
-      various sub-protocols) and organizze playlists.
+      various sub-protocols) and organize playlists.
     </para>
 
     <para>
@@ -150,7 +151,7 @@ apt-get install g++ \
         <application>systemd</application> unit files: a "service"
         unit and a "socket" unit.  These will only be installed when
         <application>MPD</application> was configured with
-        <parameter>--with-systemdsystemunitdir=/lib/systemd</parameter>.
+        <parameter>--with-systemdsystemunitdir=/lib/systemd/system</parameter>.
       </para>
 
       <para>
@@ -166,6 +167,33 @@ systemctl start mpd.socket</programlisting>
         <varname>port</varname> settings.
       </para>
     </section>
+
+    <section id="systemd_user">
+      <title><filename>systemd</filename> user unit</title>
+
+      <para>
+        You can launch <application>MPD</application> as a
+        <filename>systemd</filename> user unit.  The service file will
+        only be installed when <application>MPD</application> was
+        configured with
+        <parameter>--with-systemduserunitdir=/usr/lib/systemd/user</parameter>
+        or
+        <parameter>--with-systemduserunitdir=$HOME/.local/share/systemd/user</parameter>.
+      </para>
+
+      <para>
+        Once the user unit is installed, you can start and stop
+        <application>MPD</application> like any other service:
+      </para>
+
+      <programlisting>systemctl --user start mpd</programlisting>
+
+      <para>
+        To auto-start <application>MPD</application> upon login, type:
+      </para>
+
+      <programlisting>systemctl --user enable mpd</programlisting>
+    </section>
   </chapter>
 
   <chapter id="config">
@@ -944,6 +972,33 @@ systemctl start mpd.socket</programlisting>
     <section id="config_other">
       <title>Other Settings</title>
 
+      <informaltable>
+        <tgroup cols="2">
+          <thead>
+            <row>
+              <entry>Setting</entry>
+              <entry>Description</entry>
+            </row>
+          </thead>
+          <tbody>
+            <row>
+              <entry>
+                <varname>metadata_to_use</varname>
+                <parameter>TAG1,TAG2,...</parameter>
+              </entry>
+              <entry>
+                Use only the specified tags, and ignore the others.
+                This setting can reduce the database size and
+                <application>MPD</application>'s memory usage by
+                omitting unused tags.  By default, all tags but
+                <varname>comment</varname> are enabled.  The special
+                value "none" disables all tags.
+              </entry>
+            </row>
+          </tbody>
+        </tgroup>
+      </informaltable>
+
       <section>
         <title>The State File</title>
 
@@ -1297,6 +1352,19 @@ database {
       </para>
     </section>
 
+    <section id="tags">
+      <title>Metadata</title>
+
+      <para>
+        When scanning or playing a song,
+        <application>MPD</application> parses its metadata.  The
+        following tags are supported:
+      </para>
+
+      <xi:include href="include/tags.xml"
+                  xmlns:xi="http://www.w3.org/2001/XInclude"/>
+    </section>
+
     <section id="queue">
       <title>The queue</title>
 

src/Chrono.hxx

@@ -26,7 +26,7 @@
 #include <utility>
 #include <cstdint>
 
-#if defined(__GNUC__) && !GCC_CHECK_VERSION(4,7) && !defined(__clang__)
+#if GCC_OLDER_THAN(4,7)
 /* std::chrono::duration operators are "constexpr" since gcc 4.7 */
 #define chrono_constexpr gcc_pure
 #else

src/Compiler.h

@@ -28,24 +28,41 @@
 #define GCC_VERSION 0
 #endif
 
+#ifdef __clang__
+#  define CLANG_VERSION GCC_MAKE_VERSION(__clang_major__, __clang_minor__, __clang_patchlevel__)
+#elif defined(__GNUC__)
+#  define CLANG_VERSION 0
+#endif
+
+/**
+ * Are we building with the specified version of gcc (not clang or any
+ * other compiler) or newer?
+ */
 #define GCC_CHECK_VERSION(major, minor) \
-	(defined(__GNUC__) && GCC_VERSION >= GCC_MAKE_VERSION(major, minor, 0))
+	(CLANG_VERSION == 0 && \
+	 GCC_VERSION >= GCC_MAKE_VERSION(major, minor, 0))
+
+/**
+ * Are we building with clang (any version) or at least the specified
+ * gcc version?
+ */
+#define CLANG_OR_GCC_VERSION(major, minor) \
+	(CLANG_VERSION > 0 || GCC_CHECK_VERSION(major, minor))
 
 /**
  * Are we building with gcc (not clang or any other compiler) and a
  * version older than the specified one?
  */
 #define GCC_OLDER_THAN(major, minor) \
-	(defined(__GNUC__) && !defined(__clang__) && \
+	(GCC_VERSION > 0 && CLANG_VERSION == 0 && \
 	 GCC_VERSION < GCC_MAKE_VERSION(major, minor, 0))
 
 #ifdef __clang__
-#  define CLANG_VERSION GCC_MAKE_VERSION(__clang_major__, __clang_minor__, __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_OLDER_THAN(4,6)
+#  if GCC_OLDER_THAN(4,7)
 #    error Sorry, your gcc version is too old.  You need at least version 4.6.
 #  endif
 #else
@@ -56,10 +73,9 @@
  * Are we building with the specified version of clang or newer?
  */
 #define CLANG_CHECK_VERSION(major, minor) \
-	(defined(__clang__) && \
-	 CLANG_VERSION >= GCC_MAKE_VERSION(major, minor, 0))
+	(CLANG_VERSION >= GCC_MAKE_VERSION(major, minor, 0))
 
-#if GCC_CHECK_VERSION(4,0)
+#if CLANG_OR_GCC_VERSION(4,0)
 
 /* GCC 4.x */
 
@@ -119,7 +135,7 @@
 
 #endif
 
-#if GCC_CHECK_VERSION(4,3)
+#if CLANG_OR_GCC_VERSION(4,3)
 
 #define gcc_hot __attribute__((hot))
 #define gcc_cold __attribute__((cold))
@@ -131,7 +147,7 @@
 
 #endif /* ! GCC_UNUSED >= 40300 */
 
-#if GCC_CHECK_VERSION(4,6) && !defined(__clang__)
+#if GCC_CHECK_VERSION(4,6)
 #define gcc_flatten __attribute__((flatten))
 #else
 #define gcc_flatten
@@ -140,7 +156,7 @@
 #ifndef __cplusplus
 /* plain C99 has "restrict" */
 #define gcc_restrict restrict
-#elif GCC_CHECK_VERSION(4,0)
+#elif CLANG_OR_GCC_VERSION(4,0)
 /* "__restrict__" is a GCC extension for C++ */
 #define gcc_restrict __restrict__
 #else
@@ -158,7 +174,7 @@
 #define final
 #endif
 
-#if defined(__clang__) || GCC_CHECK_VERSION(4,8)
+#if CLANG_OR_GCC_VERSION(4,8)
 #define gcc_alignas(T, fallback) alignas(T)
 #else
 #define gcc_alignas(T, fallback) gcc_aligned(fallback)

src/LogInit.cxx

@@ -51,7 +51,7 @@ static constexpr Domain log_domain("log");
 
 #ifndef ANDROID
 
-static int out_fd;
+static int out_fd = -1;
 static AllocatedPath out_path = AllocatedPath::Null();
 
 static void redirect_logs(int fd)

src/PlayerThread.cxx

@@ -25,6 +25,7 @@
 #include "MusicPipe.hxx"
 #include "MusicBuffer.hxx"
 #include "MusicChunk.hxx"
+#include "pcm/Silence.hxx"
 #include "DetachedSong.hxx"
 #include "system/FatalError.hxx"
 #include "CrossFade.hxx"
@@ -486,8 +487,12 @@ Player::SendSilence()
 
 	MusicChunk *chunk = buffer.Allocate();
 	if (chunk == nullptr) {
-		LogError(player_domain, "Failed to allocate silence buffer");
-		return false;
+		/* this is non-fatal, because this means that the
+		   decoder has filled to buffer completely meanwhile;
+		   by ignoring the error, we work around this race
+		   condition */
+		LogDebug(player_domain, "Failed to allocate silence buffer");
+		return true;
 	}
 
 #ifndef NDEBUG
@@ -501,7 +506,7 @@ Player::SendSilence()
 
 	chunk->time = SignedSongTime::Negative(); /* undefined time stamp */
 	chunk->length = num_frames * frame_size;
-	memset(chunk->data, 0, chunk->length);
+	PcmSilence({chunk->data, chunk->length}, play_audio_format.format);
 
 	Error error;
 	if (!pc.outputs.Play(chunk, error)) {
@@ -518,6 +523,8 @@ Player::SeekDecoder()
 {
 	assert(pc.next_song != nullptr);
 
+	pc.outputs.Cancel();
+
 	const SongTime start_time = pc.next_song->GetStartTime();
 
 	if (!dc.LockIsCurrentSong(*pc.next_song)) {
@@ -583,8 +590,6 @@ Player::SeekDecoder()
 	/* re-fill the buffer after seeking */
 	buffering = true;
 
-	pc.outputs.Cancel();
-
 	return true;
 }
 

src/archive/plugins/Bzip2ArchivePlugin.cxx

@@ -53,7 +53,7 @@ public:
 
 	Bzip2ArchiveFile(Path path, InputStream *_is)
 		:ArchiveFile(bz2_archive_plugin),
-		 name(PathTraitsFS::GetBase(path.c_str())),
+		 name(path.GetBase().c_str()),
 		 istream(_is) {
 		// remove .bz2 suffix
 		const size_t len = name.length();

src/archive/plugins/Iso9660ArchivePlugin.cxx

@@ -66,7 +66,11 @@ public:
 		return iso9660_iso_seek_read(iso, ptr, start, i_size);
 	}
 
-	void Visit(const char *path, ArchiveVisitor &visitor);
+	/**
+	 * @param capacity the path buffer size
+	 */
+	void Visit(char *path, size_t length, size_t capacity,
+		   ArchiveVisitor &visitor);
 
 	virtual void Close() override {
 		Unref();
@@ -84,32 +88,36 @@ static constexpr Domain iso9660_domain("iso9660");
 /* archive open && listing routine */
 
 inline void
-Iso9660ArchiveFile::Visit(const char *psz_path, ArchiveVisitor &visitor)
+Iso9660ArchiveFile::Visit(char *path, size_t length, size_t capacity,
+			  ArchiveVisitor &visitor)
 {
-	CdioList_t *entlist;
-	CdioListNode_t *entnode;
-	iso9660_stat_t *statbuf;
-	char pathname[4096];
-
-	entlist = iso9660_ifs_readdir (iso, psz_path);
+	auto *entlist = iso9660_ifs_readdir(iso, path);
 	if (!entlist) {
 		return;
 	}
 	/* Iterate over the list of nodes that iso9660_ifs_readdir gives  */
+	CdioListNode_t *entnode;
 	_CDIO_LIST_FOREACH (entnode, entlist) {
-		statbuf = (iso9660_stat_t *) _cdio_list_node_data (entnode);
+		auto *statbuf = (iso9660_stat_t *)
+			_cdio_list_node_data(entnode);
+		const char *filename = statbuf->filename;
+		if (strcmp(filename, ".") == 0 || strcmp(filename, "..") == 0)
+			continue;
 
-		strcpy(pathname, psz_path);
-		strcat(pathname, statbuf->filename);
+		size_t filename_length = strlen(filename);
+		if (length + filename_length + 1 >= capacity)
+			/* file name is too long */
+			continue;
+
+		memcpy(path + length, filename, filename_length + 1);
+		size_t new_length = length + filename_length;
 
 		if (iso9660_stat_s::_STAT_DIR == statbuf->type ) {
-			if (strcmp(statbuf->filename, ".") && strcmp(statbuf->filename, "..")) {
-				strcat(pathname, "/");
-				Visit(pathname, visitor);
-			}
+			memcpy(path + new_length, "/", 2);
+			Visit(path, new_length + 1, capacity, visitor);
 		} else {
 			//remove leading /
-			visitor.VisitArchiveEntry(pathname + 1);
+			visitor.VisitArchiveEntry(path + 1);
 		}
 	}
 	_cdio_list_free (entlist, true);
@@ -133,7 +141,8 @@ iso9660_archive_open(Path pathname, Error &error)
 void
 Iso9660ArchiveFile::Visit(ArchiveVisitor &visitor)
 {
-	Visit("/", visitor);
+	char path[4096] = "/";
+	Visit(path, 1, sizeof(path), visitor);
 }
 
 /* single archive handling */

src/client/ClientRead.cxx

@@ -52,8 +52,8 @@ Client::OnSocketInput(void *data, size_t length)
 		break;
 
 	case CommandResult::KILL:
-		Close();
 		partition.instance.event_loop->Break();
+		Close();
 		return InputResult::CLOSED;
 
 	case CommandResult::FINISH:

src/db/Helpers.cxx

@@ -46,7 +46,7 @@ StatsVisitTag(DatabaseStats &stats, StringSet &artists, StringSet &albums,
 	for (const auto &item : tag) {
 		switch (item.type) {
 		case TAG_ARTIST:
-#if defined(__clang__) || GCC_CHECK_VERSION(4,8)
+#if CLANG_OR_GCC_VERSION(4,8)
 			artists.emplace(item.value);
 #else
 			artists.insert(item.value);
@@ -54,7 +54,7 @@ StatsVisitTag(DatabaseStats &stats, StringSet &artists, StringSet &albums,
 			break;
 
 		case TAG_ALBUM:
-#if defined(__clang__) || GCC_CHECK_VERSION(4,8)
+#if CLANG_OR_GCC_VERSION(4,8)
 			albums.emplace(item.value);
 #else
 			albums.insert(item.value);

src/db/plugins/upnp/UpnpDatabasePlugin.cxx

@@ -749,7 +749,7 @@ UpnpDatabase::VisitUniqueTags(const DatabaseSelection &selection,
 
 			const char *value = dirent.tag.GetValue(tag);
 			if (value != nullptr) {
-#if defined(__clang__) || GCC_CHECK_VERSION(4,8)
+#if CLANG_OR_GCC_VERSION(4,8)
 				values.emplace(value);
 #else
 				values.insert(value);

src/db/update/ExcludeList.cxx

@@ -34,7 +34,9 @@
 #include <string.h>
 #include <errno.h>
 
+#ifdef HAVE_GLIB
 static constexpr Domain exclude_list_domain("exclude_list");
+#endif
 
 bool
 ExcludeList::LoadFile(Path path_fs)

src/decoder/DecoderAPI.cxx

@@ -301,7 +301,8 @@ decoder_check_cancel_read(const Decoder *decoder)
 	/* ignore the SEEK command during initialization, the plugin
 	   should handle that after it has initialized successfully */
 	if (dc.command == DecoderCommand::SEEK &&
-	    (dc.state == DecoderState::START || decoder->seeking))
+	    (dc.state == DecoderState::START || decoder->seeking ||
+	     decoder->initial_seek_running))
 		return false;
 
 	return true;

src/decoder/DecoderBuffer.hxx

@@ -25,6 +25,7 @@
 #include "util/ConstBuffer.hxx"
 
 #include <stddef.h>
+#include <stdint.h>
 
 struct Decoder;
 class InputStream;

src/decoder/DecoderThread.cxx

@@ -98,6 +98,7 @@ decoder_input_stream_open(DecoderControl &dc, const char *uri)
 
 	if (!is->Check(error)) {
 		dc.Unlock();
+		delete is;
 
 		LogError(error);
 		return nullptr;
@@ -255,7 +256,11 @@ decoder_run_stream_fallback(Decoder &decoder, InputStream &is)
 {
 	const struct DecoderPlugin *plugin;
 
+#ifdef HAVE_FFMPEG
+	plugin = decoder_plugin_from_name("ffmpeg");
+#else
 	plugin = decoder_plugin_from_name("mad");
+#endif
 	return plugin != nullptr && plugin->stream_decode != nullptr &&
 		decoder_stream_decode(*plugin, decoder, is);
 }

src/decoder/plugins/DsdiffDecoderPlugin.cxx

@@ -205,7 +205,7 @@ dsdiff_handle_native_tag(InputStream &is,
 	if (length == 0 || length > 60)
 		return;
 
-	char string[length];
+	char string[length + 1];
 	char *label;
 	label = string;
 

src/decoder/plugins/FfmpegIo.cxx

@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2003-2016 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.
+ */
+
+/* necessary because libavutil/common.h uses UINT64_C */
+#define __STDC_CONSTANT_MACROS
+
+#include "config.h"
+#include "FfmpegIo.hxx"
+#include "../DecoderAPI.hxx"
+#include "input/InputStream.hxx"
+#include "util/Error.hxx"
+
+AvioStream::~AvioStream()
+{
+	if (io != nullptr) {
+		av_free(io->buffer);
+		av_free(io);
+	}
+}
+
+static int
+mpd_ffmpeg_stream_read(void *opaque, uint8_t *buf, int size)
+{
+	AvioStream *stream = (AvioStream *)opaque;
+
+	return decoder_read(stream->decoder, stream->input,
+			    (void *)buf, size);
+}
+
+static int64_t
+mpd_ffmpeg_stream_seek(void *opaque, int64_t pos, int whence)
+{
+	AvioStream *stream = (AvioStream *)opaque;
+
+	switch (whence) {
+	case SEEK_SET:
+		break;
+
+	case SEEK_CUR:
+		pos += stream->input.GetOffset();
+		break;
+
+	case SEEK_END:
+		if (!stream->input.KnownSize())
+			return -1;
+
+		pos += stream->input.GetSize();
+		break;
+
+	case AVSEEK_SIZE:
+		if (!stream->input.KnownSize())
+			return -1;
+
+		return stream->input.GetSize();
+
+	default:
+		return -1;
+	}
+
+	if (!stream->input.LockSeek(pos, IgnoreError()))
+		return -1;
+
+	return stream->input.GetOffset();
+}
+
+bool
+AvioStream::Open()
+{
+	constexpr size_t BUFFER_SIZE = 8192;
+	auto buffer = (unsigned char *)av_malloc(BUFFER_SIZE);
+	if (buffer == nullptr)
+		return false;
+
+	io = avio_alloc_context(buffer, BUFFER_SIZE,
+				false, this,
+				mpd_ffmpeg_stream_read, nullptr,
+				input.IsSeekable()
+				? mpd_ffmpeg_stream_seek : nullptr);
+	/* If avio_alloc_context() fails, who frees the buffer?  The
+	   libavformat API documentation does not specify this, it
+	   only says that AVIOContext.buffer must be freed in the end,
+	   however no AVIOContext exists in that failure code path. */
+	return io != nullptr;
+}

src/decoder/plugins/FfmpegIo.hxx

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2003-2016 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_FFMPEG_IO_HXX
+#define MPD_FFMPEG_IO_HXX
+
+#include "check.h"
+
+extern "C" {
+#include "libavformat/avio.h"
+}
+
+#include <stdint.h>
+
+class InputStream;
+struct Decoder;
+
+struct AvioStream {
+	Decoder *const decoder;
+	InputStream &input;
+
+	AVIOContext *io;
+
+	AvioStream(Decoder *_decoder, InputStream &_input)
+		:decoder(_decoder), input(_input), io(nullptr) {}
+
+	~AvioStream();
+
+	bool Open();
+};
+
+#endif

src/decoder/plugins/FfmpegMetaData.cxx

@@ -36,9 +36,9 @@ static const struct tag_table ffmpeg_tags[] = {
 };
 
 static void
-ffmpeg_copy_metadata(TagType type,
-		     AVDictionary *m, const char *name,
-		     const struct tag_handler *handler, void *handler_ctx)
+FfmpegScanTag(TagType type,
+	      AVDictionary *m, const char *name,
+	      const struct tag_handler *handler, void *handler_ctx)
 {
 	AVDictionaryEntry *mt = nullptr;
 
@@ -48,8 +48,8 @@ ffmpeg_copy_metadata(TagType type,
 }
 
 static void
-ffmpeg_scan_pairs(AVDictionary *dict,
-		  const struct tag_handler *handler, void *handler_ctx)
+FfmpegScanPairs(AVDictionary *dict,
+		const struct tag_handler *handler, void *handler_ctx)
 {
 	AVDictionaryEntry *i = nullptr;
 
@@ -59,18 +59,20 @@ ffmpeg_scan_pairs(AVDictionary *dict,
 }
 
 void
-ffmpeg_scan_dictionary(AVDictionary *dict,
-		       const struct tag_handler *handler, void *handler_ctx)
+FfmpegScanDictionary(AVDictionary *dict,
+		     const struct tag_handler *handler, void *handler_ctx)
 {
-	for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i)
-		ffmpeg_copy_metadata(TagType(i), dict, tag_item_names[i],
-				     handler, handler_ctx);
+	if (handler->tag != nullptr) {
+		for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i)
+			FfmpegScanTag(TagType(i), dict, tag_item_names[i],
+				      handler, handler_ctx);
 
-	for (const struct tag_table *i = ffmpeg_tags;
-	     i->name != nullptr; ++i)
-		ffmpeg_copy_metadata(i->type, dict, i->name,
-				     handler, handler_ctx);
+		for (const struct tag_table *i = ffmpeg_tags;
+		     i->name != nullptr; ++i)
+			FfmpegScanTag(i->type, dict, i->name,
+				      handler, handler_ctx);
+	}
 
 	if (handler->pair != nullptr)
-		ffmpeg_scan_pairs(dict, handler, handler_ctx);
+		FfmpegScanPairs(dict, handler, handler_ctx);
 }

src/decoder/plugins/FfmpegMetaData.hxx

@@ -32,7 +32,7 @@ extern "C" {
 struct tag_handler;
 
 void
-ffmpeg_scan_dictionary(AVDictionary *dict,
-		       const tag_handler *handler, void *handler_ctx);
+FfmpegScanDictionary(AVDictionary *dict,
+		     const tag_handler *handler, void *handler_ctx);
 
 #endif

src/decoder/plugins/FlacCommon.cxx

@@ -33,7 +33,7 @@ flac_data::flac_data(Decoder &_decoder,
 		     InputStream &_input_stream)
 	:FlacInput(_input_stream, &_decoder),
 	 initialized(false), unsupported(false),
-	 total_frames(0), first_frame(0), next_frame(0), position(0),
+	 position(0),
 	 decoder(_decoder), input_stream(_input_stream)
 {
 }
@@ -59,6 +59,38 @@ flac_sample_format(unsigned bits_per_sample)
 	}
 }
 
+bool
+flac_data::Initialize(unsigned sample_rate, unsigned bits_per_sample,
+		      unsigned channels, FLAC__uint64 total_frames)
+{
+	assert(!initialized);
+	assert(!unsupported);
+
+	::Error error;
+	if (!audio_format_init_checked(audio_format,
+				       sample_rate,
+				       flac_sample_format(bits_per_sample),
+				       channels, error)) {
+		LogError(error);
+		unsupported = true;
+		return false;
+	}
+
+	frame_size = audio_format.GetFrameSize();
+
+	const auto duration = total_frames > 0
+		? SignedSongTime::FromScale<uint64_t>(total_frames,
+						      audio_format.sample_rate)
+		: SignedSongTime::Negative();
+
+	decoder_initialized(decoder, audio_format,
+			    input_stream.IsSeekable(),
+			    duration);
+
+	initialized = true;
+	return true;
+}
+
 static void
 flac_got_stream_info(struct flac_data *data,
 		     const FLAC__StreamMetadata_StreamInfo *stream_info)
@@ -66,22 +98,10 @@ flac_got_stream_info(struct flac_data *data,
 	if (data->initialized || data->unsupported)
 		return;
 
-	Error error;
-	if (!audio_format_init_checked(data->audio_format,
-				       stream_info->sample_rate,
-				       flac_sample_format(stream_info->bits_per_sample),
-				       stream_info->channels, error)) {
-		LogError(error);
-		data->unsupported = true;
-		return;
-	}
-
-	data->frame_size = data->audio_format.GetFrameSize();
-
-	if (data->total_frames == 0)
-		data->total_frames = stream_info->total_samples;
-
-	data->initialized = true;
+	data->Initialize(stream_info->sample_rate,
+			 stream_info->bits_per_sample,
+			 stream_info->channels,
+			 stream_info->total_samples);
 }
 
 void flac_metadata_common_cb(const FLAC__StreamMetadata * block,
@@ -125,28 +145,11 @@ flac_got_first_frame(struct flac_data *data, const FLAC__FrameHeader *header)
 	if (data->unsupported)
 		return false;
 
-	Error error;
-	if (!audio_format_init_checked(data->audio_format,
-				       header->sample_rate,
-				       flac_sample_format(header->bits_per_sample),
-				       header->channels, error)) {
-		LogError(error);
-		data->unsupported = true;
-		return false;
-	}
-
-	data->frame_size = data->audio_format.GetFrameSize();
-
-	const auto duration = SongTime::FromScale<uint64_t>(data->total_frames,
-							    data->audio_format.sample_rate);
-
-	decoder_initialized(data->decoder, data->audio_format,
-			    data->input_stream.IsSeekable(),
-			    duration);
-
-	data->initialized = true;
-
-	return true;
+	return data->Initialize(header->sample_rate,
+				header->bits_per_sample,
+				header->channels,
+				/* unknown duration */
+				0);
 }
 
 FLAC__StreamDecoderWriteStatus
@@ -155,7 +158,6 @@ flac_common_write(struct flac_data *data, const FLAC__Frame * frame,
 		  FLAC__uint64 nbytes)
 {
 	void *buffer;
-	unsigned bit_rate;
 
 	if (!data->initialized && !flac_got_first_frame(data, &frame->header))
 		return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
@@ -167,16 +169,12 @@ flac_common_write(struct flac_data *data, const FLAC__Frame * frame,
 		     data->audio_format.format, buf,
 		     0, frame->header.blocksize);
 
-	if (nbytes > 0)
-		bit_rate = nbytes * 8 * frame->header.sample_rate /
-			(1000 * frame->header.blocksize);
-	else
-		bit_rate = 0;
+	unsigned bit_rate = nbytes * 8 * frame->header.sample_rate /
+		(1000 * frame->header.blocksize);
 
 	auto cmd = decoder_data(data->decoder, data->input_stream,
 				buffer, buffer_size,
 				bit_rate);
-	data->next_frame += frame->header.blocksize;
 	switch (cmd) {
 	case DecoderCommand::NONE:
 	case DecoderCommand::START:

src/decoder/plugins/FlacCommon.hxx

@@ -55,23 +55,9 @@ struct flac_data : public FlacInput {
 	AudioFormat audio_format;
 
 	/**
-	 * The total number of frames in this song.  The decoder
-	 * plugin may initialize this attribute to override the value
-	 * provided by libFLAC (e.g. for sub songs from a CUE sheet).
+	 * End of last frame's position within the stream.  This is
+	 * used for bit rate calculations.
 	 */
-	FLAC__uint64 total_frames;
-
-	/**
-	 * The number of the first frame in this song.  This is only
-	 * non-zero if playing sub songs from a CUE sheet.
-	 */
-	FLAC__uint64 first_frame;
-
-	/**
-	 * The number of the next frame which is going to be decoded.
-	 */
-	FLAC__uint64 next_frame;
-
 	FLAC__uint64 position;
 
 	Decoder &decoder;
@@ -80,6 +66,12 @@ struct flac_data : public FlacInput {
 	Tag tag;
 
 	flac_data(Decoder &decoder, InputStream &input_stream);
+
+	/**
+	 * Wrapper for decoder_initialized().
+	 */
+	bool Initialize(unsigned sample_rate, unsigned bits_per_sample,
+			unsigned channels, FLAC__uint64 total_frames);
 };
 
 void flac_metadata_common_cb(const FLAC__StreamMetadata * block,

src/decoder/plugins/FlacDecoderPlugin.cxx

@@ -132,26 +132,16 @@ flac_decoder_new(void)
 }
 
 static bool
-flac_decoder_initialize(struct flac_data *data, FLAC__StreamDecoder *sd,
-			FLAC__uint64 duration)
+flac_decoder_initialize(struct flac_data *data, FLAC__StreamDecoder *sd)
 {
-	data->total_frames = duration;
-
 	if (!FLAC__stream_decoder_process_until_end_of_metadata(sd)) {
-		LogWarning(flac_domain, "problem reading metadata");
+		if (FLAC__stream_decoder_get_state(sd) != FLAC__STREAM_DECODER_END_OF_STREAM)
+			LogWarning(flac_domain, "problem reading metadata");
 		return false;
 	}
 
 	if (data->initialized) {
 		/* done */
-
-		const auto duration2 =
-			SongTime::FromScale<uint64_t>(data->total_frames,
-						      data->audio_format.sample_rate);
-
-		decoder_initialized(data->decoder, data->audio_format,
-				    data->input_stream.IsSeekable(),
-				    duration2);
 		return true;
 	}
 
@@ -167,13 +157,10 @@ flac_decoder_initialize(struct flac_data *data, FLAC__StreamDecoder *sd,
 }
 
 static void
-flac_decoder_loop(struct flac_data *data, FLAC__StreamDecoder *flac_dec,
-		  FLAC__uint64 t_start, FLAC__uint64 t_end)
+flac_decoder_loop(struct flac_data *data, FLAC__StreamDecoder *flac_dec)
 {
 	Decoder &decoder = data->decoder;
 
-	data->first_frame = t_start;
-
 	while (true) {
 		DecoderCommand cmd;
 		if (!data->tag.IsEmpty()) {
@@ -184,24 +171,49 @@ flac_decoder_loop(struct flac_data *data, FLAC__StreamDecoder *flac_dec,
 			cmd = decoder_get_command(decoder);
 
 		if (cmd == DecoderCommand::SEEK) {
-			FLAC__uint64 seek_sample = t_start +
+			FLAC__uint64 seek_sample =
 				decoder_seek_where_frame(decoder);
-			if (seek_sample >= t_start &&
-			    (t_end == 0 || seek_sample <= t_end) &&
-			    FLAC__stream_decoder_seek_absolute(flac_dec, seek_sample)) {
-				data->next_frame = seek_sample;
+			if (FLAC__stream_decoder_seek_absolute(flac_dec, seek_sample)) {
 				data->position = 0;
 				decoder_command_finished(decoder);
 			} else
 				decoder_seek_error(decoder);
-		} else if (cmd == DecoderCommand::STOP ||
-			   FLAC__stream_decoder_get_state(flac_dec) == FLAC__STREAM_DECODER_END_OF_STREAM)
+		} else if (cmd == DecoderCommand::STOP)
 			break;
 
-		if (t_end != 0 && data->next_frame >= t_end)
-			/* end of this sub track */
+		switch (FLAC__stream_decoder_get_state(flac_dec)) {
+		case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
+		case FLAC__STREAM_DECODER_READ_METADATA:
+		case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
+		case FLAC__STREAM_DECODER_READ_FRAME:
+			/* continue decoding */
 			break;
 
+		case FLAC__STREAM_DECODER_END_OF_STREAM:
+			/* regular end of stream */
+			return;
+
+		case FLAC__STREAM_DECODER_SEEK_ERROR:
+			/* try to recover from seek error */
+			if (!FLAC__stream_decoder_flush(flac_dec)) {
+				LogError(flac_domain, "FLAC__stream_decoder_flush() failed");
+				return;
+			}
+
+			break;
+
+		case FLAC__STREAM_DECODER_OGG_ERROR:
+		case FLAC__STREAM_DECODER_ABORTED:
+		case FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR:
+			/* an error, fatal enough for us to abort the
+			   decoder */
+			return;
+
+		case FLAC__STREAM_DECODER_UNINITIALIZED:
+			/* we shouldn't see this, ever - bail out */
+			return;
+		}
+
 		if (!FLAC__stream_decoder_process_single(flac_dec) &&
 		    decoder_get_command(decoder) == DecoderCommand::NONE) {
 			/* a failure that was not triggered by a
@@ -250,6 +262,24 @@ stream_init(FLAC__StreamDecoder *flac_dec, struct flac_data *data, bool is_ogg)
 		: stream_init_flac(flac_dec, data);
 }
 
+static bool
+FlacInitAndDecode(struct flac_data &data, FLAC__StreamDecoder *sd, bool is_ogg)
+{
+	auto init_status = stream_init(sd, &data, is_ogg);
+	if (init_status != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
+		LogWarning(flac_domain,
+			   FLAC__StreamDecoderInitStatusString[init_status]);
+		return false;
+	}
+
+	bool result = flac_decoder_initialize(&data, sd);
+	if (result)
+		flac_decoder_loop(&data, sd);
+
+	FLAC__stream_decoder_finish(sd);
+	return result;
+}
+
 static void
 flac_decode_internal(Decoder &decoder,
 		     InputStream &input_stream,
@@ -263,24 +293,8 @@ flac_decode_internal(Decoder &decoder,
 
 	struct flac_data data(decoder, input_stream);
 
-	FLAC__StreamDecoderInitStatus status =
-		stream_init(flac_dec, &data, is_ogg);
-	if (status != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
-		FLAC__stream_decoder_delete(flac_dec);
-		LogWarning(flac_domain,
-			   FLAC__StreamDecoderInitStatusString[status]);
-		return;
-	}
+	FlacInitAndDecode(data, flac_dec, is_ogg);
 
-	if (!flac_decoder_initialize(&data, flac_dec, 0)) {
-		FLAC__stream_decoder_finish(flac_dec);
-		FLAC__stream_decoder_delete(flac_dec);
-		return;
-	}
-
-	flac_decoder_loop(&data, flac_dec, 0, 0);
-
-	FLAC__stream_decoder_finish(flac_dec);
 	FLAC__stream_decoder_delete(flac_dec);
 }
 

src/decoder/plugins/FlacIOHandle.cxx

@@ -20,6 +20,7 @@
 #include "config.h"
 #include "FlacIOHandle.hxx"
 #include "util/Error.hxx"
+#include "Log.hxx"
 #include "Compiler.h"
 
 #include <errno.h>
@@ -87,7 +88,13 @@ FlacIOSeek(FLAC__IOHandle handle, FLAC__int64 _offset, int whence)
 		return -1;
 	}
 
-	return is->LockSeek(offset, IgnoreError()) ? 0 : -1;
+	Error error;
+	if (!is->LockSeek(offset, error)) {
+		LogError(error);
+		return -1;
+	}
+
+	return 0;
 }
 
 static FLAC__int64

src/decoder/plugins/OpusDecoderPlugin.cxx

@@ -441,13 +441,15 @@ mpd_opus_scan_stream(InputStream &is,
 	if (!oy.ExpectFirstPage(os))
 		return false;
 
-	/* read at most two more pages */
-	unsigned remaining_pages = 2;
+	/* read at most 64 more pages */
+	unsigned remaining_pages = 64;
+
+	unsigned remaining_packets = 4;
 
 	bool result = false;
 
 	ogg_packet packet;
-	while (true) {
+	while (remaining_packets > 0) {
 		int r = ogg_stream_packetout(&os, &packet);
 		if (r < 0) {
 			result = false;
@@ -466,6 +468,8 @@ mpd_opus_scan_stream(InputStream &is,
 			continue;
 		}
 
+		--remaining_packets;
+
 		if (packet.b_o_s) {
 			if (!IsOpusHead(packet))
 				break;

src/decoder/plugins/OpusReader.hxx

@@ -85,7 +85,7 @@ public:
 
 	char *ReadString() {
 		uint32_t length;
-		if (!ReadWord(length))
+		if (!ReadWord(length) || length >= 65536)
 			return nullptr;
 
 		const char *src = (const char *)Read(length);

src/decoder/plugins/PcmDecoderPlugin.cxx

@@ -23,10 +23,28 @@
 #include "input/InputStream.hxx"
 #include "util/Error.hxx"
 #include "util/ByteReverse.hxx"
+#include "util/StaticFifoBuffer.hxx"
 #include "Log.hxx"
 
+#include <assert.h>
 #include <string.h>
 
+template<typename B>
+static bool
+FillBuffer(Decoder &decoder, InputStream &is, B &buffer)
+{
+	buffer.Shift();
+	auto w = buffer.Write();
+	assert(!w.IsEmpty());
+
+	size_t nbytes = decoder_read(decoder, is, w.data, w.size);
+	if (nbytes == 0 && is.LockIsEOF())
+		return false;
+
+	buffer.Append(nbytes);
+	return true;
+}
+
 static void
 pcm_stream_decode(Decoder &decoder, InputStream &is)
 {
@@ -50,25 +68,27 @@ pcm_stream_decode(Decoder &decoder, InputStream &is)
 	decoder_initialized(decoder, audio_format,
 			    is.IsSeekable(), total_time);
 
+	StaticFifoBuffer<uint8_t, 4096> buffer;
+
 	DecoderCommand cmd;
 	do {
-		char buffer[4096];
-
-		size_t nbytes = decoder_read(decoder, is,
-					     buffer, sizeof(buffer));
-
-		if (nbytes == 0 && is.LockIsEOF())
+		if (!FillBuffer(decoder, is, buffer))
 			break;
 
+		auto r = buffer.Read();
+		/* round down to the nearest frame size, because we
+		   must not pass partial frames to decoder_data() */
+		r.size -= r.size % frame_size;
+		buffer.Consume(r.size);
+
 		if (reverse_endian)
 			/* make sure we deliver samples in host byte order */
-			reverse_bytes_16((uint16_t *)buffer,
-					 (uint16_t *)buffer,
-					 (uint16_t *)(buffer + nbytes));
+			reverse_bytes_16((uint16_t *)r.data,
+					 (uint16_t *)r.data,
+					 (uint16_t *)(r.data + r.size));
 
-		cmd = nbytes > 0
-			? decoder_data(decoder, is,
-				       buffer, nbytes, 0)
+		cmd = !r.IsEmpty()
+			? decoder_data(decoder, is, r.data, r.size, 0)
 			: decoder_get_command(decoder);
 		if (cmd == DecoderCommand::SEEK) {
 			uint64_t frame = decoder_seek_where_frame(decoder);
@@ -76,6 +96,7 @@ pcm_stream_decode(Decoder &decoder, InputStream &is)
 
 			Error error;
 			if (is.LockSeek(offset, error)) {
+				buffer.Clear();
 				decoder_command_finished(decoder);
 			} else {
 				LogError(error);

src/decoder/plugins/SidplayDecoderPlugin.cxx

@@ -22,67 +22,61 @@
 #include "../DecoderAPI.hxx"
 #include "tag/TagHandler.hxx"
 #include "fs/Path.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "util/Macros.hxx"
 #include "util/FormatString.hxx"
 #include "util/Domain.hxx"
+#include "util/Error.hxx"
 #include "system/ByteOrder.hxx"
+#include "system/FatalError.hxx"
 #include "Log.hxx"
 
-#include <errno.h>
-#include <stdlib.h>
 #include <string.h>
-#include <glib.h>
 
+#ifdef HAVE_SIDPLAYFP
+#include <sidplayfp/sidplayfp.h>
+#include <sidplayfp/SidInfo.h>
+#include <sidplayfp/SidConfig.h>
+#include <sidplayfp/SidTune.h>
+#include <sidplayfp/SidTuneInfo.h>
+#include <sidplayfp/builders/resid.h>
+#include <sidplayfp/builders/residfp.h>
+#include <sidplayfp/SidDatabase.h>
+#else
 #include <sidplay/sidplay2.h>
 #include <sidplay/builders/resid.h>
 #include <sidplay/utils/SidTuneMod.h>
+#include <sidplay/utils/SidDatabase.h>
+#endif
 
 #define SUBTUNE_PREFIX "tune_"
 
 static constexpr Domain sidplay_domain("sidplay");
 
-static GPatternSpec *path_with_subtune;
-static const char *songlength_file;
-static GKeyFile *songlength_database;
+static SidDatabase *songlength_database;
 
 static bool all_files_are_containers;
 static unsigned default_songlength;
 
 static bool filter_setting;
 
-static GKeyFile *
-sidplay_load_songlength_db(const char *path)
+static SidDatabase *
+sidplay_load_songlength_db(const Path path)
 {
-	GError *error = nullptr;
-	gchar *data;
-	gsize size;
-
-	if (!g_file_get_contents(path, &data, &size, &error)) {
+	SidDatabase *db = new SidDatabase();
+#ifdef HAVE_SIDPLAYFP
+	bool error = !db->open(path.c_str());
+#else
+	bool error = db->open(path.c_str()) < 0;
+#endif
+	if (error) {
 		FormatError(sidplay_domain,
 			    "unable to read songlengths file %s: %s",
-			    path, error->message);
-		g_error_free(error);
+			    path.c_str(), db->error());
+		delete db;
 		return nullptr;
 	}
 
-	/* replace any ; comment characters with # */
-	for (gsize i = 0; i < size; i++)
-		if (data[i] == ';')
-			data[i] = '#';
-
-	GKeyFile *db = g_key_file_new();
-	bool success = g_key_file_load_from_data(db, data, size,
-						 G_KEY_FILE_NONE, &error);
-	g_free(data);
-	if (!success) {
-		FormatError(sidplay_domain,
-			    "unable to parse songlengths file %s: %s",
-			    path, error->message);
-		g_error_free(error);
-		g_key_file_free(db);
-		return nullptr;
-	}
-
-	g_key_file_set_list_separator(db, ' ');
 	return db;
 }
 
@@ -90,18 +84,18 @@ static bool
 sidplay_init(const config_param &param)
 {
 	/* read the songlengths database file */
-	songlength_file = param.GetBlockValue("songlength_database");
-	if (songlength_file != nullptr)
-		songlength_database = sidplay_load_songlength_db(songlength_file);
+	Error error;
+	const auto database_path = param.GetBlockPath("songlength_database", error);
+	if (!database_path.IsNull())
+		songlength_database = sidplay_load_songlength_db(database_path);
+	else if (error.IsDefined())
+		FatalError(error);
 
 	default_songlength = param.GetBlockValue("default_songlength", 0u);
 
 	all_files_are_containers =
 		param.GetBlockValue("all_files_are_containers", true);
 
-	path_with_subtune=g_pattern_spec_new(
-			"*/" SUBTUNE_PREFIX "???.sid");
-
 	filter_setting = param.GetBlockValue("filter", true);
 
 	return true;
@@ -110,98 +104,81 @@ sidplay_init(const config_param &param)
 static void
 sidplay_finish()
 {
-	g_pattern_spec_free(path_with_subtune);
-
-	if(songlength_database)
-		g_key_file_free(songlength_database);
+	delete songlength_database;
 }
 
-/**
- * returns the file path stripped of any /tune_xxx.sid subtune
- * suffix
- */
-static char *
-get_container_name(Path path_fs)
-{
-	char *path_container = strdup(path_fs.c_str());
+struct SidplayContainerPath {
+	AllocatedPath path;
+	unsigned track;
+};
 
-	if(!g_pattern_match(path_with_subtune,
-		strlen(path_container), path_container, nullptr))
-		return path_container;
-
-	char *ptr=g_strrstr(path_container, "/" SUBTUNE_PREFIX);
-	if(ptr) *ptr='\0';
-
-	return path_container;
-}
-
-/**
- * returns tune number from file.sid/tune_xxx.sid style path or 1 if
- * no subtune is appended
- */
+gcc_pure
 static unsigned
-get_song_num(const char *path_fs)
+ParseSubtuneName(const char *base)
 {
-	if(g_pattern_match(path_with_subtune,
-		strlen(path_fs), path_fs, nullptr)) {
-		char *sub=g_strrstr(path_fs, "/" SUBTUNE_PREFIX);
-		if(!sub) return 1;
+	if (memcmp(base, SUBTUNE_PREFIX, sizeof(SUBTUNE_PREFIX) - 1) != 0)
+		return 0;
 
-		sub+=strlen("/" SUBTUNE_PREFIX);
-		int song_num=strtol(sub, nullptr, 10);
+	base += sizeof(SUBTUNE_PREFIX) - 1;
 
-		if (errno == EINVAL)
-			return 1;
-		else
-			return song_num;
-	} else
-		return 1;
+	char *endptr;
+	auto track = strtoul(base, &endptr, 10);
+	if (endptr == base || *endptr != '.')
+		return 0;
+
+	return track;
 }
 
-/* get the song length in seconds */
+/**
+ * returns the file path stripped of any /tune_xxx.* subtune suffix
+ * and the track number (or 1 if no "tune_xxx" suffix is present).
+ */
+static SidplayContainerPath
+ParseContainerPath(Path path_fs)
+{
+	const Path base = path_fs.GetBase();
+	unsigned track;
+	if (base.IsNull() ||
+	    (track = ParseSubtuneName(base.c_str())) < 1)
+		return { AllocatedPath(path_fs), 1 };
+
+	return { path_fs.GetDirectoryName(), track };
+}
+
+#ifdef HAVE_SIDPLAYFP
+
 static SignedSongTime
-get_song_length(Path path_fs)
+get_song_length(SidTune &tune)
 {
 	if (songlength_database == nullptr)
 		return SignedSongTime::Negative();
 
-	char *sid_file = get_container_name(path_fs);
-	SidTuneMod tune(sid_file);
-	free(sid_file);
-	if(!tune) {
-		LogWarning(sidplay_domain,
-			   "failed to load file for calculating md5 sum");
+	const auto length = songlength_database->length(tune);
+	if (length < 0)
 		return SignedSongTime::Negative();
-	}
-	char md5sum[SIDTUNE_MD5_LENGTH+1];
-	tune.createMD5(md5sum);
 
-	const unsigned song_num = get_song_num(path_fs.c_str());
-
-	gsize num_items;
-	gchar **values=g_key_file_get_string_list(songlength_database,
-		"Database", md5sum, &num_items, nullptr);
-	if(!values || song_num>num_items) {
-		g_strfreev(values);
-		return SignedSongTime::Negative();
-	}
-
-	int minutes=strtol(values[song_num-1], nullptr, 10);
-	if(errno==EINVAL) minutes=0;
-
-	int seconds;
-	char *ptr=strchr(values[song_num-1], ':');
-	if(ptr) {
-		seconds=strtol(ptr+1, nullptr, 10);
-		if(errno==EINVAL) seconds=0;
-	} else
-		seconds=0;
-
-	g_strfreev(values);
-
-	return SignedSongTime::FromS((minutes * 60) + seconds);
+	return SignedSongTime::FromS(length);
 }
 
+#else
+
+static SignedSongTime
+get_song_length(SidTuneMod &tune)
+{
+	assert(tune);
+
+	if (songlength_database == nullptr)
+		return SignedSongTime::Negative();
+
+	const auto length = songlength_database->length(tune);
+	if (length < 0)
+		return SignedSongTime::Negative();
+
+	return SignedSongTime::FromS(length);
+}
+
+#endif
+
 static void
 sidplay_file_decode(Decoder &decoder, Path path_fs)
 {
@@ -209,26 +186,43 @@ sidplay_file_decode(Decoder &decoder, Path path_fs)
 
 	/* load the tune */
 
-	char *path_container=get_container_name(path_fs);
-	SidTune tune(path_container, nullptr, true);
-	free(path_container);
-	if (!tune) {
-		LogWarning(sidplay_domain, "failed to load file");
+	const auto container = ParseContainerPath(path_fs);
+#ifdef HAVE_SIDPLAYFP
+	SidTune tune(container.path.c_str());
+#else
+	SidTuneMod tune(container.path.c_str());
+#endif
+	if (!tune.getStatus()) {
+#ifdef HAVE_SIDPLAYFP
+		const char *error = tune.statusString();
+#else
+		const char *error = tune.getInfo().statusString;
+#endif
+		FormatWarning(sidplay_domain, "failed to load file: %s",
+			      error);
 		return;
 	}
 
-	const int song_num = get_song_num(path_fs.c_str());
+	const int song_num = container.track;
 	tune.selectSong(song_num);
 
-	auto duration = get_song_length(path_fs);
+	auto duration = get_song_length(tune);
 	if (duration.IsNegative() && default_songlength > 0)
 		duration = SongTime::FromS(default_songlength);
 
 	/* initialize the player */
 
+#ifdef HAVE_SIDPLAYFP
+	sidplayfp player;
+#else
 	sidplay2 player;
-	int iret = player.load(&tune);
-	if (iret != 0) {
+#endif
+#ifdef HAVE_SIDPLAYFP
+	bool error = !player.load(&tune);
+#else
+	bool error = player.load(&tune) < 0;
+#endif
+	if (error) {
 		FormatWarning(sidplay_domain,
 			      "sidplay2.load() failed: %s", player.error());
 		return;
@@ -236,53 +230,104 @@ sidplay_file_decode(Decoder &decoder, Path path_fs)
 
 	/* initialize the builder */
 
-	ReSIDBuilder builder("ReSID");
-	if (!builder) {
-		LogWarning(sidplay_domain,
-			   "failed to initialize ReSIDBuilder");
+#ifdef HAVE_SIDPLAYFP
+	ReSIDfpBuilder builder("ReSID");
+	if (!builder.getStatus()) {
+		FormatWarning(sidplay_domain,
+			      "failed to initialize ReSIDfpBuilder: %s",
+			      builder.error());
 		return;
 	}
 
+	builder.create(player.info().maxsids());
+	if (!builder.getStatus()) {
+		FormatWarning(sidplay_domain,
+			      "ReSIDfpBuilder.create() failed: %s",
+			      builder.error());
+		return;
+	}
+#else
+	ReSIDBuilder builder("ReSID");
 	builder.create(player.info().maxsids);
 	if (!builder) {
-		LogWarning(sidplay_domain, "ReSIDBuilder.create() failed");
+		FormatWarning(sidplay_domain, "ReSIDBuilder.create() failed: %s",
+			      builder.error());
 		return;
 	}
+#endif
 
 	builder.filter(filter_setting);
-	if (!builder) {
-		LogWarning(sidplay_domain, "ReSIDBuilder.filter() failed");
+#ifdef HAVE_SIDPLAYFP
+	if (!builder.getStatus()) {
+		FormatWarning(sidplay_domain,
+			      "ReSIDfpBuilder.filter() failed: %s",
+			      builder.error());
 		return;
 	}
+#else
+	if (!builder) {
+		FormatWarning(sidplay_domain, "ReSIDBuilder.filter() failed: %s",
+			      builder.error());
+		return;
+	}
+#endif
 
 	/* configure the player */
 
-	sid2_config_t config = player.config();
+	auto config = player.config();
 
+#ifndef HAVE_SIDPLAYFP
 	config.clockDefault = SID2_CLOCK_PAL;
 	config.clockForced = true;
 	config.clockSpeed = SID2_CLOCK_CORRECT;
+#endif
 	config.frequency = 48000;
+#ifndef HAVE_SIDPLAYFP
 	config.optimisation = SID2_DEFAULT_OPTIMISATION;
 
 	config.precision = 16;
 	config.sidDefault = SID2_MOS6581;
+#endif
 	config.sidEmulation = &builder;
+#ifdef HAVE_SIDPLAYFP
+	config.samplingMethod = SidConfig::INTERPOLATE;
+	config.fastSampling = false;
+#else
 	config.sidModel = SID2_MODEL_CORRECT;
 	config.sidSamples = true;
 	config.sampleFormat = IsLittleEndian()
 		? SID2_LITTLE_SIGNED
 		: SID2_BIG_SIGNED;
-	if (tune.isStereo()) {
+#endif
+
+#ifdef HAVE_SIDPLAYFP
+	const bool stereo = tune.getInfo()->sidChips() >= 2;
+#else
+	const bool stereo = tune.isStereo();
+#endif
+
+	if (stereo) {
+#ifdef HAVE_SIDPLAYFP
+		config.playback = SidConfig::STEREO;
+#else
 		config.playback = sid2_stereo;
+#endif
 		channels = 2;
 	} else {
+#ifdef HAVE_SIDPLAYFP
+		config.playback = SidConfig::MONO;
+#else
 		config.playback = sid2_mono;
+#endif
 		channels = 1;
 	}
 
-	iret = player.config(config);
-	if (iret != 0) {
+#ifdef HAVE_SIDPLAYFP
+	error = !player.config(config);
+#else
+	error = player.config(config) < 0;
+#endif
+	if (error) {
 		FormatWarning(sidplay_domain,
 			      "sidplay2.config() failed: %s", player.error());
 		return;
@@ -297,20 +342,31 @@ sidplay_file_decode(Decoder &decoder, Path path_fs)
 
 	/* .. and play */
 
+#ifdef HAVE_SIDPLAYFP
+	constexpr unsigned timebase = 1;
+#else
 	const unsigned timebase = player.timebase();
+#endif
 	const unsigned end = duration.IsNegative()
 		? 0u
 		: duration.ToScale<uint64_t>(timebase);
 
 	DecoderCommand cmd;
 	do {
-		char buffer[4096];
-		size_t nbytes;
+		short buffer[4096];
 
-		nbytes = player.play(buffer, sizeof(buffer));
-		if (nbytes == 0)
+		const auto result = player.play(buffer, ARRAY_SIZE(buffer));
+		if (result <= 0)
 			break;
 
+#ifdef HAVE_SIDPLAYFP
+		/* libsidplayfp returns the number of samples */
+		const size_t nbytes = result * sizeof(buffer[0]);
+#else
+		/* libsidplay2 returns the number of bytes */
+		const size_t nbytes = result;
+#endif
+
 		decoder_timestamp(decoder, (double)player.time() / timebase);
 
 		cmd = decoder_data(decoder, nullptr, buffer, nbytes, 0);
@@ -327,12 +383,9 @@ sidplay_file_decode(Decoder &decoder, Path path_fs)
 			}
 
 			/* ignore data until target time is reached */
-			while(data_time<target_time) {
-				nbytes=player.play(buffer, sizeof(buffer));
-				if(nbytes==0)
-					break;
+			while (data_time < target_time &&
+			       player.play(buffer, ARRAY_SIZE(buffer)) > 0)
 				data_time = player.time();
-			}
 
 			decoder_command_finished(decoder);
 		}
@@ -343,41 +396,72 @@ sidplay_file_decode(Decoder &decoder, Path path_fs)
 	} while (cmd != DecoderCommand::STOP);
 }
 
+gcc_pure
+static const char *
+GetInfoString(const SidTuneInfo &info, unsigned i)
+{
+#ifdef HAVE_SIDPLAYFP
+	return info.numberOfInfoStrings() > i
+		? info.infoString(i)
+		: nullptr;
+#else
+	return info.numberOfInfoStrings > i
+		? info.infoString[i]
+		: nullptr;
+#endif
+}
+
 static bool
 sidplay_scan_file(Path path_fs,
 		  const struct tag_handler *handler, void *handler_ctx)
 {
-	const int song_num = get_song_num(path_fs.c_str());
-	char *path_container=get_container_name(path_fs);
+	const auto container = ParseContainerPath(path_fs);
+	const unsigned song_num = container.track;
 
-	SidTune tune(path_container, nullptr, true);
-	free(path_container);
-	if (!tune)
+#ifdef HAVE_SIDPLAYFP
+	SidTune tune(container.path.c_str());
+#else
+	SidTuneMod tune(container.path.c_str());
+#endif
+	if (!tune.getStatus())
 		return false;
 
+	tune.selectSong(song_num);
+
+#ifdef HAVE_SIDPLAYFP
+	const SidTuneInfo &info = *tune.getInfo();
+	const unsigned n_tracks = info.songs();
+#else
 	const SidTuneInfo &info = tune.getInfo();
+	const unsigned n_tracks = info.songs;
+#endif
 
 	/* title */
-	const char *title;
-	if (info.numberOfInfoStrings > 0 && info.infoString[0] != nullptr)
-		title=info.infoString[0];
-	else
-		title="";
+	const char *title = GetInfoString(info, 0);
+	if (title == nullptr)
+		title = "";
 
-	if(info.songs>1) {
+	if (n_tracks > 1) {
 		char tag_title[1024];
 		snprintf(tag_title, sizeof(tag_title),
-			 "%s (%d/%d)",
-			 title, song_num, info.songs);
+			 "%s (%d/%u)",
+			 title, song_num, n_tracks);
 		tag_handler_invoke_tag(handler, handler_ctx,
 				       TAG_TITLE, tag_title);
 	} else
 		tag_handler_invoke_tag(handler, handler_ctx, TAG_TITLE, title);
 
 	/* artist */
-	if (info.numberOfInfoStrings > 1 && info.infoString[1] != nullptr)
+	const char *artist = GetInfoString(info, 1);
+	if (artist != nullptr)
 		tag_handler_invoke_tag(handler, handler_ctx, TAG_ARTIST,
-				       info.infoString[1]);
+				       artist);
+
+	/* date */
+	const char *date = GetInfoString(info, 2);
+	if (date != nullptr)
+		tag_handler_invoke_tag(handler, handler_ctx, TAG_DATE,
+				       date);
 
 	/* track */
 	char track[16];
@@ -385,7 +469,7 @@ sidplay_scan_file(Path path_fs,
 	tag_handler_invoke_tag(handler, handler_ctx, TAG_TRACK, track);
 
 	/* time */
-	const auto duration = get_song_length(path_fs);
+	const auto duration = get_song_length(tune);
 	if (!duration.IsNegative())
 		tag_handler_invoke_duration(handler, handler_ctx,
 					    SongTime(duration));
@@ -397,19 +481,25 @@ static char *
 sidplay_container_scan(Path path_fs, const unsigned int tnum)
 {
 	SidTune tune(path_fs.c_str(), nullptr, true);
-	if (!tune)
+	if (!tune.getStatus())
 		return nullptr;
 
-	const SidTuneInfo &info=tune.getInfo();
+#ifdef HAVE_SIDPLAYFP
+	const SidTuneInfo &info = *tune.getInfo();
+	const unsigned n_tracks = info.songs();
+#else
+	const SidTuneInfo &info = tune.getInfo();
+	const unsigned n_tracks = info.songs;
+#endif
 
 	/* Don't treat sids containing a single tune
 		as containers */
-	if(!all_files_are_containers && info.songs<2)
+	if(!all_files_are_containers && n_tracks < 2)
 		return nullptr;
 
 	/* Construct container/tune path names, eg.
 		Delta.sid/tune_001.sid */
-	if(tnum<=info.songs) {
+	if (tnum <= n_tracks) {
 		return FormatNew(SUBTUNE_PREFIX "%03u.sid", tnum);
 	} else
 		return nullptr;

src/decoder/plugins/WildmidiDecoderPlugin.cxx

@@ -65,6 +65,24 @@ wildmidi_finish(void)
 	WildMidi_Shutdown();
 }
 
+static DecoderCommand
+wildmidi_output(Decoder &decoder, midi *wm)
+{
+#ifdef LIBWILDMIDI_VER_MAJOR
+	/* WildMidi 0.4 has switched from "char*" to "int8_t*" */
+	int8_t buffer[4096];
+#else
+	/* pre 0.4 */
+	char buffer[4096];
+#endif
+
+	int length = WildMidi_GetOutput(wm, buffer, sizeof(buffer));
+	if (length <= 0)
+		return DecoderCommand::STOP;
+
+	return decoder_data(decoder, nullptr, buffer, length, 0);
+}
+
 static void
 wildmidi_file_decode(Decoder &decoder, Path path_fs)
 {
@@ -94,18 +112,11 @@ wildmidi_file_decode(Decoder &decoder, Path path_fs)
 
 	DecoderCommand cmd;
 	do {
-		char buffer[4096];
-		int len;
-
 		info = WildMidi_GetInfo(wm);
 		if (info == nullptr)
 			break;
 
-		len = WildMidi_GetOutput(wm, buffer, sizeof(buffer));
-		if (len <= 0)
-			break;
-
-		cmd = decoder_data(decoder, nullptr, buffer, len, 0);
+		cmd = wildmidi_output(decoder, wm);
 
 		if (cmd == DecoderCommand::SEEK) {
 			unsigned long seek_where =

src/encoder/plugins/WaveEncoderPlugin.cxx

@@ -27,6 +27,8 @@
 #include <assert.h>
 #include <string.h>
 
+static constexpr uint16_t WAVE_FORMAT_PCM = 1;
+
 struct WaveEncoder {
 	Encoder encoder;
 	unsigned bits;
@@ -64,15 +66,15 @@ fill_wave_header(struct wave_header *header, int channels, int bits,
 	header->id_fmt = ToLE32(0x20746d66);
 	header->id_data = ToLE32(0x61746164);
 
-        /* wave format */
-	header->format = ToLE16(1); // PCM_FORMAT
+	/* wave format */
+	header->format = ToLE16(WAVE_FORMAT_PCM);
 	header->channels = ToLE16(channels);
 	header->bits = ToLE16(bits);
 	header->freq = ToLE32(freq);
 	header->blocksize = ToLE16(block_size);
 	header->byterate = ToLE32(freq * block_size);
 
-        /* chunk sizes (fake data length) */
+	/* chunk sizes (fake data length) */
 	header->fmt_size = ToLE32(16);
 	header->data_size = ToLE32(data_size);
 	header->riff_size = ToLE32(4 + (8 + 16) + (8 + data_size));

src/event/BufferedSocket.cxx

@@ -118,9 +118,15 @@ BufferedSocket::OnSocketReady(unsigned flags)
 	if (flags & READ) {
 		assert(!input.IsFull());
 
-		if (!ReadToBuffer() || !ResumeInput())
+		if (!ReadToBuffer())
 			return false;
 
+		if (!ResumeInput())
+			/* we must return "true" here or
+			   SocketMonitor::Dispatch() will call
+			   Cancel() on a freed object */
+			return true;
+
 		if (!input.IsFull())
 			ScheduleRead();
 	}

src/filter/plugins/ReplayGainFilterPlugin.cxx

@@ -134,8 +134,6 @@ ReplayGainFilter::Update()
 		volume = pcm_float_to_volume(scale);
 	}
 
-	pv.SetVolume(volume);
-
 	if (mixer != nullptr) {
 		/* update the hardware mixer volume */
 
@@ -146,7 +144,8 @@ ReplayGainFilter::Update()
 		Error error;
 		if (!mixer_set_volume(mixer, _volume, error))
 			LogError(error, "Failed to update hardware mixer");
-	}
+	} else
+		pv.SetVolume(volume);
 }
 
 static Filter *
@@ -174,7 +173,9 @@ ReplayGainFilter::Close()
 ConstBuffer<void>
 ReplayGainFilter::FilterPCM(ConstBuffer<void> src, gcc_unused Error &error)
 {
-	return pv.Apply(src);
+	return mixer != nullptr
+		? src
+		: pv.Apply(src);
 }
 
 const struct filter_plugin replay_gain_filter_plugin = {

src/filter/plugins/RouteFilterPlugin.cxx

@@ -47,9 +47,11 @@
 #include "filter/FilterInternal.hxx"
 #include "filter/FilterRegistry.hxx"
 #include "pcm/PcmBuffer.hxx"
+#include "pcm/Silence.hxx"
 #include "util/StringUtil.hxx"
 #include "util/Error.hxx"
 #include "util/ConstBuffer.hxx"
+#include "util/WritableBuffer.hxx"
 
 #include <algorithm>
 
@@ -266,9 +268,8 @@ RouteFilter::FilterPCM(ConstBuffer<void> src, gcc_unused Error &error)
 			    (unsigned)sources[c] >= input_format.channels) {
 				// No source for this destination output,
 				// give it zeroes as input
-				memset(chan_destination,
-					0x00,
-					bytes_per_frame_per_channel);
+				PcmSilence({chan_destination, bytes_per_frame_per_channel},
+					   input_format.format);
 			} else {
 				// Get the data from channel sources[c]
 				// and copy it to the output

src/fs/AllocatedPath.cxx

@@ -111,7 +111,7 @@ AllocatedPath::ChopSeparators()
 	while (l >= 2 && PathTraitsFS::IsSeparator(p[l - 1])) {
 		--l;
 
-#if GCC_CHECK_VERSION(4,7) && !defined(__clang__)
+#if GCC_CHECK_VERSION(4,7)
 		value.pop_back();
 #else
 		value.erase(value.end() - 1, value.end());

src/fs/AllocatedPath.hxx

@@ -252,7 +252,7 @@ public:
 	void ChopSeparators();
 
 	gcc_pure
-	bool IsAbsolute() {
+	bool IsAbsolute() const {
 		return PathTraitsFS::IsAbsolute(c_str());
 	}
 };

src/fs/Path.hxx

@@ -29,6 +29,8 @@
 #include <assert.h>
 #include <string.h>
 
+class AllocatedPath;
+
 /**
  * A path name in the native file system character set.
  *
@@ -128,6 +130,22 @@ public:
 	gcc_pure
 	std::string ToUTF8() const;
 
+	/**
+	 * Determine the "base" file name.
+	 * The return value points inside this object.
+	 */
+	gcc_pure
+	Path GetBase() const {
+		return FromFS(PathTraitsFS::GetBase(value));
+	}
+
+	/**
+	 * Gets directory name of this path.
+	 * Returns a "nulled" instance on error.
+	 */
+	gcc_pure
+	AllocatedPath GetDirectoryName() const;
+
 	/**
 	 * Determine the relative part of the given path to this
 	 * object, not including the directory separator.  Returns an
@@ -140,7 +158,7 @@ public:
 	}
 
 	gcc_pure
-	bool IsAbsolute() {
+	bool IsAbsolute() const {
 		return PathTraitsFS::IsAbsolute(c_str());
 	}
 };

src/fs/Path2.cxx

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2003-2014 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 "Path.hxx"
+#include "AllocatedPath.hxx"
+
+AllocatedPath
+Path::GetDirectoryName() const
+{
+	return AllocatedPath::FromFS(PathTraitsFS::GetParent(c_str()));
+}

src/input/plugins/AlsaInputPlugin.cxx

@@ -247,6 +247,10 @@ AlsaInputStream::Recover(int err)
 	case -EPIPE:
 		LogDebug(alsa_input_domain, "Buffer Overrun");
 		// drop through
+#if GCC_CHECK_VERSION(7,0)
+		[[fallthrough]];
+#endif
+
 	case -ESTRPIPE:
 	case -EINTR:
 		err = snd_pcm_recover(capture_handle, err, 1);

src/lib/ffmpeg/Buffer.hxx

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2003-2014 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_FFMPEG_BUFFER_HXX
+#define MPD_FFMPEG_BUFFER_HXX
+
+extern "C" {
+#include <libavutil/mem.h>
+
+#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(52, 18, 0)
+#define HAVE_AV_FAST_MALLOC
+#else
+#include <libavcodec/avcodec.h>
+#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52, 25, 0)
+#define HAVE_AV_FAST_MALLOC
+#endif
+#endif
+}
+
+#include <stddef.h>
+
+/* suppress the ffmpeg compatibility macro */
+#ifdef SampleFormat
+#undef SampleFormat
+#endif
+
+class FfmpegBuffer {
+	void *data;
+	unsigned size;
+
+public:
+	FfmpegBuffer():data(nullptr), size(0) {}
+
+	~FfmpegBuffer() {
+		av_free(data);
+	}
+
+	void *Get(size_t min_size) {
+#ifdef HAVE_AV_FAST_MALLOC
+		av_fast_malloc(&data, &size, min_size);
+#else
+		void *new_data = av_fast_realloc(data, &size, min_size);
+		if (new_data == nullptr)
+			return AVERROR(ENOMEM);
+		data = new_data;
+#endif
+		return data;
+	}
+
+	template<typename T>
+	T *GetT(size_t n) {
+		return (T *)Get(n * sizeof(T));
+	}
+};
+
+#endif

src/lib/ffmpeg/Init.cxx

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2003-2014 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.
+ */
+
+/* necessary because libavutil/common.h uses UINT64_C */
+#define __STDC_CONSTANT_MACROS
+
+#include "config.h"
+#include "Init.hxx"
+#include "LogCallback.hxx"
+
+extern "C" {
+#include <libavformat/avformat.h>
+}
+
+void
+FfmpegInit()
+{
+	av_log_set_callback(FfmpegLogCallback);
+
+	av_register_all();
+}
+

src/lib/ffmpeg/Init.hxx

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2003-2014 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_FFMPEG_INIT_HXX
+#define MPD_FFMPEG_INIT_HXX
+
+void
+FfmpegInit();
+
+#endif

src/lib/ffmpeg/LogCallback.cxx

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2003-2014 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.
+ */
+
+/* necessary because libavutil/common.h uses UINT64_C */
+#define __STDC_CONSTANT_MACROS
+
+#include "config.h"
+#include "LogCallback.hxx"
+#include "Domain.hxx"
+#include "LogV.hxx"
+#include "util/Domain.hxx"
+
+extern "C" {
+#include <libavutil/log.h>
+}
+
+#include <stdio.h>
+
+gcc_const
+static LogLevel
+FfmpegImportLogLevel(int level)
+{
+	if (level <= AV_LOG_FATAL)
+		return LogLevel::ERROR;
+
+	if (level <= AV_LOG_WARNING)
+		return LogLevel::WARNING;
+
+	if (level <= AV_LOG_INFO)
+		return LogLevel::INFO;
+
+	return LogLevel::DEBUG;
+}
+
+void
+FfmpegLogCallback(gcc_unused void *ptr, int level, const char *fmt, va_list vl)
+{
+	const AVClass * cls = nullptr;
+
+	if (ptr != nullptr)
+		cls = *(const AVClass *const*)ptr;
+
+	if (cls != nullptr) {
+		char domain[64];
+		snprintf(domain, sizeof(domain), "%s/%s",
+			 ffmpeg_domain.GetName(), cls->item_name(ptr));
+		const Domain d(domain);
+		LogFormatV(d, FfmpegImportLogLevel(level), fmt, vl);
+	}
+}

src/lib/ffmpeg/LogCallback.hxx

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2003-2014 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_FFMPEG_LOG_CALLBACK_HXX
+#define MPD_FFMPEG_LOG_CALLBACK_HXX
+
+#include "check.h"
+
+#include <stdarg.h>
+
+void
+FfmpegLogCallback(void *ptr, int level, const char *fmt, va_list vl);
+
+#endif

src/lib/ffmpeg/LogError.cxx

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2003-2014 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 "LogError.hxx"
+#include "Domain.hxx"
+#include "Log.hxx"
+
+#include <cstdint> /* needed due to libavutil bug */
+
+extern "C" {
+#include <libavutil/error.h>
+}
+
+void
+LogFfmpegError(int errnum)
+{
+	char msg[256];
+	av_strerror(errnum, msg, sizeof(msg));
+	LogError(ffmpeg_domain, msg);
+}
+
+void
+LogFfmpegError(int errnum, const char *prefix)
+{
+	char msg[256];
+	av_strerror(errnum, msg, sizeof(msg));
+	FormatError(ffmpeg_domain, "%s: %s", prefix, msg);
+}

src/lib/ffmpeg/LogError.hxx

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2003-2014 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_FFMPEG_LOG_ERROR_HXX
+#define MPD_FFMPEG_LOG_ERROR_HXX
+
+void
+LogFfmpegError(int errnum);
+
+void
+LogFfmpegError(int errnum, const char *prefix);
+
+#endif

src/lib/ffmpeg/Time.hxx

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2003-2014 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_FFMPEG_TIME_HXX
+#define MPD_FFMPEG_TIME_HXX
+
+#include "Chrono.hxx"
+#include "Compiler.h"
+
+extern "C" {
+#include <libavutil/avutil.h>
+#include <libavutil/mathematics.h>
+}
+
+#include <assert.h>
+#include <stdint.h>
+
+/* suppress the ffmpeg compatibility macro */
+#ifdef SampleFormat
+#undef SampleFormat
+#endif
+
+gcc_const
+static inline double
+FfmpegTimeToDouble(int64_t t, const AVRational time_base)
+{
+	assert(t != (int64_t)AV_NOPTS_VALUE);
+
+	return (double)av_rescale_q(t, time_base, (AVRational){1, 1024})
+		/ (double)1024;
+}
+
+template<typename Ratio>
+static inline constexpr AVRational
+RatioToAVRational()
+{
+	return { Ratio::num, Ratio::den };
+}
+
+/**
+ * Convert a FFmpeg time stamp to a #SongTime.
+ */
+gcc_const
+static inline SongTime
+FromFfmpegTime(int64_t t, const AVRational time_base)
+{
+	assert(t != (int64_t)AV_NOPTS_VALUE);
+
+	return SongTime::FromMS(av_rescale_q(t, time_base,
+					     (AVRational){1, 1000}));
+}
+
+/**
+ * Convert a FFmpeg time stamp to a #SignedSongTime.
+ */
+gcc_const
+static inline SignedSongTime
+FromFfmpegTimeChecked(int64_t t, const AVRational time_base)
+{
+	return t != (int64_t)AV_NOPTS_VALUE
+		? SignedSongTime(FromFfmpegTime(t, time_base))
+		: SignedSongTime::Negative();
+}
+
+/**
+ * Convert a #SongTime to a FFmpeg time stamp with the given base.
+ */
+gcc_const
+static inline int64_t
+ToFfmpegTime(SongTime t, const AVRational time_base)
+{
+	return av_rescale_q(t.count(),
+			    RatioToAVRational<SongTime::period>(),
+			    time_base);
+}
+
+/**
+ * Replace #AV_NOPTS_VALUE with the given fallback.
+ */
+static constexpr int64_t
+FfmpegTimestampFallback(int64_t t, int64_t fallback)
+{
+	return gcc_likely(t != int64_t(AV_NOPTS_VALUE))
+		? t
+		: fallback;
+}
+
+#endif

src/lib/nfs/Manager.cxx

@@ -59,6 +59,18 @@ NfsManager::Compare::operator()(const ManagedConnection &a,
 	return result < 0;
 }
 
+inline bool
+NfsManager::Compare::operator()(const ManagedConnection &a,
+				const ManagedConnection &b) const
+{
+	int result = strcmp(a.GetServer(), b.GetServer());
+	if (result != 0)
+		return result < 0;
+
+	result = strcmp(a.GetExportName(), b.GetExportName());
+	return result < 0;
+}
+
 NfsManager::~NfsManager()
 {
 	assert(GetEventLoop().IsInside());

src/lib/nfs/Manager.hxx

@@ -64,6 +64,10 @@ class NfsManager final : IdleMonitor {
 		gcc_pure
 		bool operator()(const ManagedConnection &a,
 				const LookupKey b) const;
+
+		gcc_pure
+		bool operator()(const ManagedConnection &a,
+				const ManagedConnection &b) const;
 	};
 
 	/**

src/mixer/plugins/PulseMixerPlugin.cxx

@@ -218,7 +218,7 @@ PulseMixer::SetVolume(unsigned new_volume, Error &error)
 
 	struct pa_cvolume cvolume;
 	pa_cvolume_set(&cvolume, volume.channels,
-		       (pa_volume_t)new_volume * PA_VOLUME_NORM / 100 + 0.5);
+		       (new_volume * PA_VOLUME_NORM + 50) / 100);
 	bool success = pulse_output_set_volume(output, &cvolume, error);
 	if (success)
 		volume = cvolume;

src/neighbor/plugins/SmbclientNeighborPlugin.cxx

@@ -216,7 +216,7 @@ SmbclientNeighborExplorer::Run()
 			prev = i;
 		} else {
 			/* can't see it anymore: move to "lost" */
-#if defined(__clang__) || GCC_CHECK_VERSION(4,7)
+#if CLANG_OR_GCC_VERSION(4,7)
 			lost.splice_after(lost.before_begin(), list, prev);
 #else
 			/* the forward_list::splice_after() lvalue

src/notify.hxx

@@ -28,7 +28,7 @@ struct notify {
 	Cond cond;
 	bool pending;
 
-#if !defined(WIN32) && !defined(__NetBSD__) && !defined(__BIONIC__)
+#ifdef __GLIBC__
 	constexpr
 #endif
 	notify():pending(false) {}

src/output/plugins/AlsaOutputPlugin.cxx

@@ -760,6 +760,9 @@ alsa_recover(AlsaOutput *ad, int err)
 		if (err == -EAGAIN)
 			return 0;
 		/* fall-through to snd_pcm_prepare: */
+#if GCC_CHECK_VERSION(7,0)
+		[[fallthrough]];
+#endif
 	case SND_PCM_STATE_SETUP:
 	case SND_PCM_STATE_XRUN:
 		ad->period_position = 0;

src/output/plugins/PulseOutputPlugin.cxx

@@ -545,7 +545,6 @@ pulse_output_open(AudioOutput *ao, AudioFormat &audio_format,
 		  Error &error)
 {
 	PulseOutput *po = (PulseOutput *)ao;
-	pa_sample_spec ss;
 
 	assert(po->mainloop != nullptr);
 
@@ -575,11 +574,30 @@ pulse_output_open(AudioOutput *ao, AudioFormat &audio_format,
 		return false;
 	}
 
-	/* MPD doesn't support the other pulseaudio sample formats, so
-	   we just force MPD to send us everything as 16 bit */
-	audio_format.format = SampleFormat::S16;
+	/* Use the sample formats that our version of PulseAudio and MPD
+	   have in common, otherwise force MPD to send 16 bit */
+
+	pa_sample_spec ss;
+
+	switch (audio_format.format) {
+	case SampleFormat::FLOAT:
+		ss.format = PA_SAMPLE_FLOAT32NE;
+		break;
+	case SampleFormat::S32:
+		ss.format = PA_SAMPLE_S32NE;
+		break;
+	case SampleFormat::S24_P32:
+		ss.format = PA_SAMPLE_S24_32NE;
+		break;
+	case SampleFormat::S16:
+		ss.format = PA_SAMPLE_S16NE;
+		break;
+	default:
+		audio_format.format = SampleFormat::S16;
+		ss.format = PA_SAMPLE_S16NE;
+		break;
+	}
 
-	ss.format = PA_SAMPLE_S16NE;
 	ss.rate = audio_format.sample_rate;
 	ss.channels = audio_format.channels;
 

src/output/plugins/ShoutOutputPlugin.cxx

@@ -164,7 +164,9 @@ ShoutOutput::Configure(const config_param &param, Error &error)
 		}
 	}
 
-	const char *encoding = param.GetBlockValue("encoding", "ogg");
+	const char *encoding = param.GetBlockValue("encoder", nullptr);
+	if (encoding == nullptr)
+		encoding = param.GetBlockValue("encoding", "vorbis");
 	const auto encoder_plugin = shout_encoder_plugin_get(encoding);
 	if (encoder_plugin == nullptr) {
 		error.Format(config_domain,
@@ -247,7 +249,6 @@ ShoutOutput::Configure(const config_param &param, Error &error)
 
 	{
 		char temp[11];
-		memset(temp, 0, sizeof(temp));
 
 		snprintf(temp, sizeof(temp), "%u", audio_format.channels);
 		shout_set_audio_info(shout_conn, SHOUT_AI_CHANNELS, temp);

src/output/plugins/WinmmOutputPlugin.cxx

@@ -148,10 +148,10 @@ winmm_output_open(AudioOutput *ao, AudioFormat &audio_format,
 	}
 
 	switch (audio_format.format) {
-	case SampleFormat::S8:
 	case SampleFormat::S16:
 		break;
 
+	case SampleFormat::S8:
 	case SampleFormat::S24_P32:
 	case SampleFormat::S32:
 	case SampleFormat::FLOAT:

src/output/plugins/httpd/HttpdInternal.hxx

@@ -153,7 +153,7 @@ public:
 	HttpdOutput(EventLoop &_loop);
 	~HttpdOutput();
 
-#if defined(__clang__) || GCC_CHECK_VERSION(4,7)
+#if CLANG_OR_GCC_VERSION(4,7)
 	constexpr
 #endif
 	static HttpdOutput *Cast(AudioOutput *ao) {

src/pcm/Interleave.cxx

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2003-2015 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 "Interleave.hxx"
+
+#include <stdint.h>
+#include <string.h>
+
+static void
+GenericPcmInterleave(uint8_t *dest, ConstBuffer<const uint8_t *> src,
+		     size_t n_frames, size_t sample_size)
+{
+	for (size_t frame = 0; frame < n_frames; ++frame) {
+		for (size_t channel = 0; channel < src.size; ++channel) {
+			memcpy(dest, src[channel] + frame * sample_size,
+			       sample_size);
+			dest += sample_size;
+		}
+	}
+}
+
+void
+PcmInterleave(void *dest, ConstBuffer<const void *> src,
+	      size_t n_frames, size_t sample_size)
+{
+	GenericPcmInterleave((uint8_t *)dest,
+			     ConstBuffer<const uint8_t *>((const uint8_t *const*)src.data,
+							  src.size),
+			     n_frames, sample_size);
+}

src/pcm/Interleave.hxx

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2003-2015 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_PCM_INTERLEAVE_HXX
+#define MPD_PCM_INTERLEAVE_HXX
+
+#include "check.h"
+#include "util/ConstBuffer.hxx"
+
+/**
+ * Interleave planar PCM samples from #src to #dest.
+ */
+void
+PcmInterleave(void *dest, ConstBuffer<const void *> src,
+	      size_t n_frames, size_t sample_size);
+
+#endif

src/pcm/Silence.cxx

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2003-2016 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 "Silence.hxx"
+#include "AudioFormat.hxx"
+#include "util/WritableBuffer.hxx"
+
+#include <string.h>
+
+void
+PcmSilence(WritableBuffer<void> dest, SampleFormat format)
+{
+	uint8_t pattern = 0;
+	if (format == SampleFormat::DSD)
+		pattern = 0x69;
+
+	memset(dest.data, pattern, dest.size);
+}

src/pcm/Silence.hxx

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2003-2016 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_PCM_SILENCE_HXX
+#define MPD_PCM_SILENCE_HXX
+
+#include "check.h"
+
+#include <stdint.h>
+
+template<typename T> struct WritableBuffer;
+enum class SampleFormat : uint8_t;
+
+/**
+ * Fill the given buffer with the format-specific silence pattern.
+ */
+void
+PcmSilence(WritableBuffer<void> dest, SampleFormat format);
+
+#endif

src/pcm/Volume.cxx

@@ -19,10 +19,12 @@
 
 #include "config.h"
 #include "Volume.hxx"
+#include "Silence.hxx"
 #include "Domain.hxx"
 #include "PcmUtils.hxx"
 #include "Traits.hxx"
 #include "util/ConstBuffer.hxx"
+#include "util/WritableBuffer.hxx"
 #include "util/Error.hxx"
 
 #include "PcmDither.cxx" // including the .cxx file to get inlined templates
@@ -134,9 +136,7 @@ PcmVolume::Apply(ConstBuffer<void> src)
 
 	if (volume == 0) {
 		/* optimized special case: 0% volume = memset(0) */
-		/* TODO: is this valid for all sample formats? What
-		   about floating point? */
-		memset(data, 0, src.size);
+		PcmSilence({data, src.size}, format);
 		return { data, src.size };
 	}
 

src/protocol/ArgParser.cxx

@@ -92,7 +92,7 @@ check_range(Client &client, unsigned *value_r1, unsigned *value_r2,
 		return false;
 	}
 
-	if (unsigned(value) > std::numeric_limits<unsigned>::max()) {
+	if (value > std::numeric_limits<int>::max()) {
 		command_error(client, ACK_ERROR_ARG,
 			      "Number too large: %s", s);
 		return false;
@@ -117,7 +117,7 @@ check_range(Client &client, unsigned *value_r1, unsigned *value_r2,
 			return false;
 		}
 
-		if (unsigned(value) > std::numeric_limits<unsigned>::max()) {
+		if (value > std::numeric_limits<int>::max()) {
 			command_error(client, ACK_ERROR_ARG,
 				      "Number too large: %s", s);
 			return false;

src/queue/Queue.cxx

@@ -426,14 +426,15 @@ Queue::SetPriority(unsigned position, uint8_t priority, int after_order)
 
 		if (_order < (unsigned)after_order) {
 			/* the specified song has been played already
-			   - enqueue it only if its priority has just
-			   become bigger than the current one's */
+			   - enqueue it only if its priority has been
+			   increased and is now bigger than the
+			   current one's */
 
 			const unsigned after_position =
 				OrderToPosition(after_order);
 			const Item *after_item =
 				&items[after_position];
-			if (old_priority > after_item->priority ||
+			if (priority <= old_priority ||
 			    priority <= after_item->priority)
 				/* priority hasn't become bigger */
 				return true;

src/storage/CompositeStorage.cxx

@@ -137,7 +137,7 @@ CompositeStorage::Directory::Make(const char *uri)
 	Directory *directory = this;
 	while (*uri != 0) {
 		const std::string name = NextSegment(uri);
-#if defined(__clang__) || GCC_CHECK_VERSION(4,8)
+#if CLANG_OR_GCC_VERSION(4,8)
 		auto i = directory->children.emplace(std::move(name),
 						     Directory());
 #else
@@ -265,22 +265,13 @@ CompositeStorage::FindStorage(const char *uri) const
 	return result;
 }
 
-CompositeStorage::FindResult
-CompositeStorage::FindStorage(const char *uri, Error &error) const
-{
-	auto result = FindStorage(uri);
-	if (result.directory == nullptr)
-		error.Set(composite_domain, "No such directory");
-	return result;
-}
-
 bool
 CompositeStorage::GetInfo(const char *uri, bool follow, FileInfo &info,
 			  Error &error)
 {
 	const ScopeLock protect(mutex);
 
-	auto f = FindStorage(uri, error);
+	auto f = FindStorage(uri);
 	if (f.directory->storage != nullptr &&
 	    f.directory->storage->GetInfo(f.uri, follow, info, error))
 		return true;
@@ -295,6 +286,8 @@ CompositeStorage::GetInfo(const char *uri, bool follow, FileInfo &info,
 		return true;
 	}
 
+	if (!error.IsDefined())
+		error.Set(composite_domain, "No such directory");
 	return false;
 }
 
@@ -304,13 +297,15 @@ CompositeStorage::OpenDirectory(const char *uri,
 {
 	const ScopeLock protect(mutex);
 
-	auto f = FindStorage(uri, error);
+	auto f = FindStorage(uri);
 	const Directory *directory = f.directory->Find(f.uri);
 	if (directory == nullptr || directory->children.empty()) {
 		/* no virtual directories here */
 
-		if (f.directory->storage == nullptr)
+		if (f.directory->storage == nullptr) {
+			error.Set(composite_domain, "No such directory");
 			return nullptr;
+		}
 
 		return f.directory->storage->OpenDirectory(f.uri, error);
 	}

src/storage/CompositeStorage.hxx

@@ -45,7 +45,7 @@ class CompositeStorage final : public Storage {
 	 */
 	struct Directory {
 		/**
-		 * The #Storage mounted n this virtual directory.  All
+		 * The #Storage mounted in this virtual directory.  All
 		 * "leaf" Directory instances must have a #Storage.
 		 * Other Directory instances may have one, and child
 		 * mounts will be "mixed" in.
@@ -155,9 +155,16 @@ private:
 		}
 	}
 
+	/**
+	 * Follow the given URI path, and find the outermost directory
+	 * which is a #Storage mount point.  If there are no mounts,
+	 * it returns the root directory (with a nullptr "storage"
+	 * attribute, of course).  FindResult::uri contains the
+	 * remaining unused part of the URI (may be empty if all of
+	 * the URI was used).
+	 */
 	gcc_pure
 	FindResult FindStorage(const char *uri) const;
-	FindResult FindStorage(const char *uri, Error &error) const;
 
 	const char *MapToRelativeUTF8(const Directory &directory,
 				      const char *uri) const;

src/system/ByteOrder.hxx

@@ -40,7 +40,7 @@
 /* well-known big-endian */
 #  define IS_LITTLE_ENDIAN false
 #  define IS_BIG_ENDIAN true
-#elif defined(__APPLE__)
+#elif defined(__APPLE__) || defined(__NetBSD__)
 /* compile-time check for MacOS */
 #  include <machine/endian.h>
 #  if BYTE_ORDER == LITTLE_ENDIAN

src/tag/Set.cxx

@@ -75,7 +75,7 @@ TagSet::InsertUnique(const Tag &src, TagType type, const char *value,
 	else
 		builder.AddItem(type, value);
 	CopyTagMask(builder, src, group_mask);
-#if defined(__clang__) || GCC_CHECK_VERSION(4,8)
+#if CLANG_OR_GCC_VERSION(4,8)
 	emplace(builder.Commit());
 #else
 	insert(builder.Commit());

src/tag/TagItem.hxx

@@ -21,7 +21,6 @@
 #define MPD_TAG_ITEM_HXX
 
 #include "TagType.h"
-#include "Compiler.h"
 
 /**
  * One tag value.  It is a mapping of #TagType to am arbitrary string
@@ -35,11 +34,14 @@ struct TagItem {
 	/**
 	 * the value of this tag; this is a variable length string
 	 */
-	char value[sizeof(long) - sizeof(type)];
+	char value[1];
 
 	TagItem() = default;
 	TagItem(const TagItem &other) = delete;
 	TagItem &operator=(const TagItem &other) = delete;
-} gcc_packed;
+};
+
+static_assert(sizeof(TagItem) == 2, "Unexpected size");
+static_assert(alignof(TagItem) == 1, "Unexpected alignment");
 
 #endif

src/tag/TagPool.cxx

@@ -23,19 +23,23 @@
 #include "util/Cast.hxx"
 #include "util/VarSize.hxx"
 
+#include <limits>
+
 #include <assert.h>
 #include <string.h>
 #include <stdlib.h>
 
 Mutex tag_pool_lock;
 
-static constexpr size_t NUM_SLOTS = 4096;
+static constexpr size_t NUM_SLOTS = 4093;
 
 struct TagPoolSlot {
 	TagPoolSlot *next;
 	unsigned char ref;
 	TagItem item;
 
+	static constexpr unsigned MAX_REF = std::numeric_limits<decltype(ref)>::max();
+
 	TagPoolSlot(TagPoolSlot *_next, TagType type,
 		    const char *value, size_t length)
 		:next(_next), ref(1) {
@@ -46,7 +50,7 @@ struct TagPoolSlot {
 
 	static TagPoolSlot *Create(TagPoolSlot *_next, TagType type,
 				   const char *value, size_t length);
-} gcc_packed;
+};
 
 TagPoolSlot *
 TagPoolSlot::Create(TagPoolSlot *_next, TagType type,
@@ -87,7 +91,7 @@ calc_hash(TagType type, const char *p)
 	return hash ^ type;
 }
 
-#if defined(__clang__) || GCC_CHECK_VERSION(4,7)
+#if CLANG_OR_GCC_VERSION(4,7)
 	constexpr
 #endif
 static inline TagPoolSlot *
@@ -116,7 +120,7 @@ tag_pool_get_item(TagType type, const char *value, size_t length)
 		if (slot->item.type == type &&
 		    length == strlen(slot->item.value) &&
 		    memcmp(value, slot->item.value, length) == 0 &&
-		    slot->ref < 0xff) {
+		    slot->ref < TagPoolSlot::MAX_REF) {
 			assert(slot->ref > 0);
 			++slot->ref;
 			return &slot->item;
@@ -135,19 +139,15 @@ tag_pool_dup_item(TagItem *item)
 
 	assert(slot->ref > 0);
 
-	if (slot->ref < 0xff) {
+	if (slot->ref < TagPoolSlot::MAX_REF) {
 		++slot->ref;
 		return item;
 	} else {
-		/* the reference counter overflows above 0xff;
-		   duplicate the item, and start with 1 */
+		/* the reference counter overflows above MAX_REF;
+		   obtain a reference to a different TagPoolSlot which
+		   isn't yet "full" */
 		size_t length = strlen(item->value);
-		auto slot_p = tag_value_slot_p(item->type,
-					       item->value, length);
-		slot = TagPoolSlot::Create(*slot_p, item->type,
-					   item->value, strlen(item->value));
-		*slot_p = slot;
-		return &slot->item;
+		return tag_pool_get_item(item->type, item->value, length);
 	}
 }
 

src/thread/PosixCond.hxx

@@ -41,9 +41,13 @@ class PosixCond {
 	pthread_cond_t cond;
 
 public:
-#if defined(__NetBSD__) || defined(__BIONIC__)
-	/* NetBSD's PTHREAD_COND_INITIALIZER is not compatible with
-	   "constexpr" */
+#ifdef __GLIBC__
+	/* optimized constexpr constructor for pthread implementations
+	   that support it */
+	constexpr PosixCond():cond(PTHREAD_COND_INITIALIZER) {}
+#else
+	/* slow fallback for pthread implementations that are not
+	   compatible with "constexpr" */
 	PosixCond() {
 		pthread_cond_init(&cond, nullptr);
 	}
@@ -51,10 +55,6 @@ public:
 	~PosixCond() {
 		pthread_cond_destroy(&cond);
 	}
-#else
-	/* optimized constexpr constructor for sane POSIX
-	   implementations */
-	constexpr PosixCond():cond(PTHREAD_COND_INITIALIZER) {}
 #endif
 
 	PosixCond(const PosixCond &other) = delete;

src/thread/PosixMutex.hxx

@@ -41,9 +41,13 @@ class PosixMutex {
 	pthread_mutex_t mutex;
 
 public:
-#if defined(__NetBSD__) || defined(__BIONIC__)
-	/* NetBSD's PTHREAD_MUTEX_INITIALIZER is not compatible with
-	   "constexpr" */
+#ifdef __GLIBC__
+	/* optimized constexpr constructor for pthread implementations
+	   that support it */
+	constexpr PosixMutex():mutex(PTHREAD_MUTEX_INITIALIZER) {}
+#else
+	/* slow fallback for pthread implementations that are not
+	   compatible with "constexpr" */
 	PosixMutex() {
 		pthread_mutex_init(&mutex, nullptr);
 	}
@@ -51,10 +55,6 @@ public:
 	~PosixMutex() {
 		pthread_mutex_destroy(&mutex);
 	}
-#else
-	/* optimized constexpr constructor for sane POSIX
-	   implementations */
-	constexpr PosixMutex():mutex(PTHREAD_MUTEX_INITIALIZER) {}
 #endif
 
 	PosixMutex(const PosixMutex &other) = delete;

src/util/Cast.hxx

@@ -84,7 +84,7 @@ ContainerAttributeOffset(const A C::*p)
  * Cast the given pointer to a struct member to its parent structure.
  */
 template<class C, class A>
-#if defined(__clang__) || GCC_CHECK_VERSION(4,7)
+#if CLANG_OR_GCC_VERSION(4,7)
 constexpr
 #endif
 static inline C &
@@ -97,7 +97,7 @@ ContainerCast(A &a, A C::*member)
  * Cast the given pointer to a struct member to its parent structure.
  */
 template<class C, class A>
-#if defined(__clang__) || GCC_CHECK_VERSION(4,7)
+#if CLANG_OR_GCC_VERSION(4,7)
 constexpr
 #endif
 static inline const C &

src/util/HugeAllocator.cxx

@@ -46,7 +46,7 @@ static size_t
 AlignToPageSize(size_t size)
 {
 	static const long page_size = sysconf(_SC_PAGESIZE);
-	if (page_size > 0)
+	if (page_size == 0)
 		return size;
 
 	size_t ps(page_size);

src/util/Manual.hxx

@@ -41,7 +41,7 @@
 
 #include <assert.h>
 
-#if defined(__clang__) || GCC_CHECK_VERSION(4,7)
+#if CLANG_OR_GCC_VERSION(4,7)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wstrict-aliasing"
 #endif
@@ -114,7 +114,7 @@ public:
 	}
 };
 
-#if defined(__clang__) || GCC_VERSION >= 40700
+#if CLANG_OR_GCC_VERSION(4,7)
 #pragma GCC diagnostic pop
 #endif
 

src/util/ScopeExit.hxx

@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2015 Max Kellermann <max@duempel.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+ * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SCOPE_EXIT_HXX
+#define SCOPE_EXIT_HXX
+
+#include "Compiler.h"
+
+#include <utility>
+
+/**
+ * Internal class.  Do not use directly.
+ */
+template<typename F>
+class ScopeExitGuard : F {
+	bool enabled = true;
+
+public:
+	explicit ScopeExitGuard(F &&f):F(std::forward<F>(f)) {}
+
+	ScopeExitGuard(ScopeExitGuard &&src)
+		:F(std::move(src)) {
+		src.enabled = false;
+	}
+
+	~ScopeExitGuard() {
+		if (enabled)
+			F::operator()();
+	}
+
+	ScopeExitGuard(const ScopeExitGuard &) = delete;
+	ScopeExitGuard &operator=(const ScopeExitGuard &) = delete;
+};
+
+/**
+ * Internal class.  Do not use directly.
+ */
+struct ScopeExitTag {
+	/* this operator is a trick so we don't need to close
+	   parantheses at the end of the expression AtScopeExit()
+	   call */
+	template<typename F>
+	ScopeExitGuard<F> operator+(F &&f) {
+		return ScopeExitGuard<F>(std::forward<F>(f));
+	}
+};
+
+#define ScopeExitCat(a, b) a ## b
+#define ScopeExitName(line) ScopeExitCat(at_scope_exit_, line)
+
+/**
+ * Call the block after this macro at the end of the current scope.
+ * Parameters are lambda captures.
+ *
+ * This is exception-safe, however the given code block must not throw
+ * exceptions.
+ *
+ * This attempts to be a better boost/scope_exit.hpp, without all of
+ * Boost's compile-time and runtime bloat.
+ */
+#define AtScopeExit(...) auto ScopeExitName(__LINE__) = ScopeExitTag() + [__VA_ARGS__]()
+
+#endif

systemd/mpd.service.in

@@ -1,13 +0,0 @@
-[Unit]
-Description=Music Player Daemon
-After=network.target sound.target
-
-[Service]
-ExecStart=@prefix@/bin/mpd --no-daemon
-
-# allow MPD to use real-time priority 50
-LimitRTPRIO=50
-LimitRTTIME=infinity
-
-[Install]
-WantedBy=multi-user.target

systemd/system/mpd.service.in

@@ -0,0 +1,26 @@
+[Unit]
+Description=Music Player Daemon
+After=network.target sound.target
+
+[Service]
+ExecStart=@prefix@/bin/mpd --no-daemon
+
+# allow MPD to use real-time priority 50
+LimitRTPRIO=50
+LimitRTTIME=infinity
+
+# disallow writing to /usr, /bin, /sbin, ...
+ProtectSystem=yes
+
+# more paranoid security settings
+NoNewPrivileges=yes
+ProtectKernelTunables=yes
+ProtectControlGroups=yes
+ProtectKernelModules=yes
+# AF_NETLINK is required by libsmbclient, or it will exit() .. *sigh*
+RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX AF_NETLINK
+RestrictNamespaces=yes
+
+[Install]
+WantedBy=multi-user.target
+Also=mpd.socket

systemd/user/mpd.service.in

@@ -0,0 +1,29 @@
+[Unit]
+Description=Music Player Daemon
+After=network.target sound.target
+
+[Service]
+ExecStart=@prefix@/bin/mpd --no-daemon
+
+# allow MPD to use real-time priority 50
+LimitRTPRIO=50
+LimitRTTIME=infinity
+
+# disallow writing to /usr, /bin, /sbin, ...
+ProtectSystem=yes
+
+# more paranoid security settings
+NoNewPrivileges=yes
+ProtectKernelTunables=yes
+ProtectControlGroups=yes
+# AF_NETLINK is required by libsmbclient, or it will exit() .. *sigh*
+RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX AF_NETLINK
+RestrictNamespaces=yes
+
+# Note that "ProtectKernelModules=yes" is missing in the user unit
+# because systemd 232 is unable to reduce its own capabilities
+# ("Failed at step CAPABILITIES spawning /usr/bin/mpd: Operation not
+# permitted")
+
+[Install]
+WantedBy=default.target

test/test_byte_reverse.cxx

@@ -49,9 +49,9 @@ CPPUNIT_TEST_SUITE_REGISTRATION(ByteReverseTest);
 void
 ByteReverseTest::TestByteReverse2()
 {
-	static const char src[] = "123456";
+	static const char src[] gcc_alignas(uint16_t, 2) = "123456";
 	static const char result[] = "214365";
-	static uint8_t dest[ARRAY_SIZE(src)];
+	static uint8_t dest[ARRAY_SIZE(src)] gcc_alignas(uint16_t, 2);
 
 	reverse_bytes(dest, (const uint8_t *)src,
 		      (const uint8_t *)(src + ARRAY_SIZE(src) - 1), 2);
@@ -73,9 +73,9 @@ ByteReverseTest::TestByteReverse3()
 void
 ByteReverseTest::TestByteReverse4()
 {
-	static const char src[] = "12345678";
+	static const char src[] gcc_alignas(uint32_t, 4) = "12345678";
 	static const char result[] = "43218765";
-	static uint8_t dest[ARRAY_SIZE(src)];
+	static uint8_t dest[ARRAY_SIZE(src)] gcc_alignas(uint32_t, 4);
 
 	reverse_bytes(dest, (const uint8_t *)src,
 		      (const uint8_t *)(src + ARRAY_SIZE(src) - 1), 4);

test/test_queue_priority.cxx

@@ -164,21 +164,6 @@ QueuePriorityTest::TestPriority()
 
 	check_descending_priority(&queue, current_order + 1);
 
-	/* priority=60 for the old prio50 item; must not be moved,
-	   because it's before the current song, and it's status
-	   hasn't changed (it was already higher before) */
-
-	unsigned c_order = 0;
-	unsigned c_position = queue.OrderToPosition(c_order);
-	CPPUNIT_ASSERT_EQUAL(50u, unsigned(queue.items[c_position].priority));
-	queue.SetPriority(c_position, 60, current_order);
-
-	current_order = queue.PositionToOrder(current_position);
-	CPPUNIT_ASSERT_EQUAL(3u, current_order);
-
-	c_order = queue.PositionToOrder(c_position);
-	CPPUNIT_ASSERT_EQUAL(0u, c_order);
-
 	/* move the prio=20 item back */
 
 	a_order = queue.PositionToOrder(a_position);