Commit Graph

20 Commits

Author SHA1 Message Date
Justin Ruggles
7f3a7b5c40 ac3enc: add channel coupling support
Channel coupling is an optional AC-3 feature that increases quality by
combining high frequency information from multiple channels into a
single channel. The per-channel high frequency information is sent with
less accuracy in both the frequency and time domains. This allows more
bits to be used for lower frequencies while preserving enough
information to reconstruct the high frequencies.
2011-05-24 07:52:31 +02:00
Justin Ruggles
e6e9823488 Add apply_window_int16() to DSPContext with x86-optimized versions and use it
in the ac3_fixed encoder.
2011-03-22 21:08:30 -04:00
Mans Rullgard
2912e87a6c Replace FFmpeg with Libav in licence headers
Signed-off-by: Mans Rullgard <mans@mansr.com>
2011-03-19 13:33:20 +00:00
Reinhard Tartler
737eb5976f Merge libavcore into libavutil
It is pretty hopeless that other considerable projects will adopt
libavutil alone in other projects. Projects that need small footprint
are better off with more specialized libraries such as gnulib or rather
just copy the necessary parts that they need. With this in mind, nobody
is helped by having libavutil and libavcore split. In order to ease
maintenance inside and around FFmpeg and to reduce confusion where to
put common code, avcore's functionality is merged (back) to avutil.

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
2011-02-15 16:18:21 +01:00
Diego Elio Pettenò
6ed3b504f9 Move ff_ac3_critical_band_size_tab in ac3.c for non-hardcoded tables.
This symbol is only ever used to calculate the non-hardcoded tables, so
only enable it in that case, and static to the source unit that uses it.

Signed-off-by: Mans Rullgard <mans@mansr.com>
2011-01-25 15:10:10 +00:00
Justin Ruggles
dc7e07ac1f Add stereo rematrixing support to the AC-3 encoders.
This improves the audio quality significantly for stereo source with both the
fixed-point and floating-point AC-3 encoders.
Update acodec-ac3_fixed and seek-ac3_rm test references.

Originally committed as revision 26271 to svn://svn.ffmpeg.org/ffmpeg/trunk
2011-01-08 23:21:17 +00:00
Justin Ruggles
e0b9f94b39 cosmetics: use some size macros in ac3tab.c/h
Originally committed as revision 25969 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-12-14 14:51:47 +00:00
Stefano Sabatini
63e8d9760f Use the new libavcore audio channel API.
This also allows to remove a linking dependency of libavfilter on
libavcodec.

Originally committed as revision 25789 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-11-21 20:06:22 +00:00
Måns Rullgård
49bd8e4b84 Fix grammar errors in documentation
Originally committed as revision 23904 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-06-30 15:38:06 +00:00
Diego Biurrun
ba87f0801d Remove explicit filename from Doxygen @file commands.
Passing an explicit filename to this command is only necessary if the
documentation in the @file block refers to a file different from the
one the block resides in.

Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-04-20 14:45:34 +00:00
Justin Ruggles
306a1204ff Update AC-3 channel map. 2F/2R layout only has 4 channels. This correction
does not change any current channel mapping behavior.

Originally committed as revision 19919 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-09-19 04:56:22 +00:00
Justin Ruggles
bfeca7beb6 Add channel layout support to the AC-3 decoder and AC-3 parser.
Originally committed as revision 18622 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-04-19 15:05:32 +00:00
Justin Ruggles
95f3019a51 ac3dec: reorder output channels to SMPTE channel order
Originally committed as revision 18542 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-04-17 08:43:04 +00:00
Justin Ruggles
a7c6e1171b ac3enc: reorder input channels to AC-3 channel order
Originally committed as revision 18540 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-04-17 08:39:11 +00:00
Diego Biurrun
bad5537e2c Use full internal pathname in doxygen @file directives.
Otherwise doxygen complains about ambiguous filenames when files exist
under the same name in different subdirectories.

Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-02-01 02:00:19 +00:00
Justin Ruggles
14b7062829 cosmetics: make all references to AC-3 capitalized and hyphenated
Originally committed as revision 14523 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-03 16:42:32 +00:00
Bartlomiej Wolowiec
0c79b1402a add a ff_ac3_parse_header_full() which calls ff_ac3_parse_header()
and then reads the channel_map stuff

Originally committed as revision 12944 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-04-24 22:27:13 +00:00
Justin Ruggles
66ecf18e38 cosmetics: rename ac3 tables
Originally committed as revision 11193 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-09 03:21:33 +00:00
Michael Niedermayer
b9b7472eb5 cosmetic
Originally committed as revision 10465 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-09-10 00:31:27 +00:00
Aurelien Jacobs
7adb10bedf move ac3 tables from a .h to a .c
Originally committed as revision 8816 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-04-25 22:12:51 +00:00