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Eric Wollesen 4970c42c86 shout: introduce pluggable encoder API
I've perhaps gone a bit overboard, but here's the current rundown:

Both Ogg and MP3 use the "shout" audio output plugin.  The shout audio
output plugin itself has two new plugins, one for the Ogg encoder,
and another for the MP3 (LAME) encoder.

Configuration for an Ogg stream doesn't change.  For an MP3 stream,
configuration is the same as Ogg, with two exceptions.  First, you must
specify the optional "encoding" parameter, which should be set to "mp3".
See mpd.conf(5) for more details.  Second, the "quality" parameter is
reversed for LAME, such that 1 is high quality for LAME, whereas 10 is
high quality for Ogg.

I've decomposed the code so that all libshout related operations
are done in audioOutput_shout.c, all Ogg specific functions are in
audioOutput_shout_ogg.c, and of course then all LAME specific functions
are handled in audioOutput_shout_mp3.c.

To develop encoder plugins for the shout audio output plugin, I basically
just mimicked the plugin system used for audio outputs.  This might be
overkill, but hopefully if anyone ever wants to support some other sort
of stream, like maybe AAC, FLAC, or WMA (hey it could happen), they will
hopefully be all set.

The Ogg encoder is slightly less optimal under this configuration.
It used to send shout data directly out of its ogg_page structures.  Now,
in the interest of encapsulation, it copies the data from its ogg_page
structures into a buffer provided by the shout audio output plugin (see
audioOutput_shout_ogg.c, line 77.)  I suspect the performance impact
is negligible.

As for metadata, I'm pretty sure they'll both work.  I wrote up a test
scaffold that would create a fake tag, and tell the plugin to send it
out to the stream every few seconds.  It seemed to work fine.  Of course,
if something does break, I'll be glad to fix it.

Lastly, I've renamed lots of things into snake_case, in keeping with
normalperson's wishes in that regard.

[mk: moved the MP3 patch after this one.  Splitted this patch into
several parts; the others were already applied before this one.  Fixed
a bunch GCC warnings and wrong whitespace modifications.  Made it
compile with mpd-mk by adapting to its prototypes]
2008-09-12 16:04:40 +02:00
bs build: enable -Wcast-qual -Wwrite-strings CFLAGS 2008-09-07 18:37:29 +02:00
doc shout: introduce pluggable encoder API 2008-09-12 16:04:40 +02:00
m4 quote "=" in the CFLAGS check 2008-08-25 15:51:18 +02:00
scripts scripts/mpd-indent.sh: fixup goto label indentation 2007-12-16 21:47:48 +00:00
src shout: introduce pluggable encoder API 2008-09-12 16:04:40 +02:00
AUTHORS Updating Kodest's name/email. 2007-06-25 12:13:45 +00:00
autogen.sh autogen.sh: support for newer autoconf versions (2.60, 2.61) 2008-01-27 23:10:37 +00:00
build.mk bs: better support for mp4/faad/aac and wavpack builds 2008-08-16 04:17:54 +00:00
ChangeLog Update ChangeLog and TODO 2008-02-25 00:19:14 +00:00
configure.ac shout: introduce pluggable encoder API 2008-09-12 16:04:40 +02:00
COPYING import from SF CVS 2004-02-23 23:41:20 +00:00
INSTALL Updating INSTALL. 2007-05-27 13:38:52 +00:00
Makefile.am Merge branches/ew r7104 2007-12-28 02:56:25 +00:00
README Doc updates for 0.13.0 2007-03-31 15:20:39 +00:00
TODO Update ChangeLog and TODO 2008-02-25 00:19:14 +00:00
UPGRADING Updating UPGRADING. 2007-05-27 13:30:46 +00:00

                       Music Player Daemon (MPD)
                        http://www.musicpd.org

A daemon for playing music of various formats.  Music is played through the 
server's audio device.  The daemon stores info about all available music, 
and this info can be easily searched and retrieved.  Player control, info
retrieval, and playlist management can all be managed remotely.

To install MPD, see INSTALL.

MPD includes mp4ff in the source, due to licensing issues of the newer 
version and includes bugfixes with the properly licensed version.  mp4ff is 
released under the GPL and copyrighted by M. Bakker, Ahead Software AG 
(http://www.nero.com) and is distributed as a part of the FAAD2 - Freeware 
Advance Audio (AAC) Decoder.

MPD is released under the GNU Public License.
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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
For the full license, see COPYING.