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23 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
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
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
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
Carl Eugen Hoyos
ca6e7708b4 Add spectral extension to the E-AC-3 decoder. 
Original patch by Justin, updated and resubmitted by
Christophe Gisquet, christophe D gisquet A gmail

Originally committed as revision 22734 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-03-30 22:09:14 +00:00
Diego Biurrun
d15153244f refactoring: properly separate AC-3 and E-AC-3 code 
Originally committed as revision 19501 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-07-23 02:33:25 +00:00
Diego Biurrun
7f4e15e2f4 cosmetics: Reorder some tables/lines to make future diffs smaller. 
Originally committed as revision 19498 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-07-22 23:33:58 +00:00
Diego Biurrun
4c4b50530e cosmetics: small typo fixes 
Originally committed as revision 19496 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-07-22 22:43:43 +00:00
Justin Ruggles
9907c7804a eac3dec: make GAQ dequantization 24-bit 
Originally committed as revision 18888 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-05-21 00:15:03 +00:00
Justin Ruggles
ae04de316f eac3dec: revert commit r18860. keep the AHT IDCT 24-bit. will make AHT GAQ 
dequantization 24-bit in a separate commit.

Originally committed as revision 18887 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-05-21 00:09:23 +00:00
Justin Ruggles
9a7a71ed4c eac3dec: use 16-bit pre-mantissas instead of 24-bit in AHT decoding. it is 
simpler and also fixes a bug in GAQ dequantization.

Originally committed as revision 18860 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-05-17 06:53:24 +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
e202cc2580 revert r15812 (E-AC-3 Spectral Extension) pending further review 
Originally committed as revision 15818 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-11-13 22:38:38 +00:00
Justin Ruggles
0cc51734b2 add support for spectral extension 
Originally committed as revision 15812 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-11-13 03:18:13 +00:00
Reimar Döffinger
9b5ede5b64 Add (additional) const to many global tables. 
Originally committed as revision 15515 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-10-02 15:52:04 +00:00
Justin Ruggles
53e6fbb4c5 cosmetics: rename a table 
Originally committed as revision 15003 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-27 23:44:34 +00:00
Justin Ruggles
ffc2b3412c right shift the values by 8 in GAQ remap "B" table. data now fits in int8_t. 
Originally committed as revision 14958 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-25 00:15:29 +00:00
Justin Ruggles
c5b930e674 1000l to me. committed to wrong repo. revert last commit. 
Originally committed as revision 14953 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-24 22:57:25 +00:00
Justin Ruggles
e23e4de3ae cosmetics: rename some functions from *get_* to *decode_* 
Originally committed as revision 14952 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-24 22:55:08 +00:00
Justin Ruggles
602116df9b Hardcode the table for ungrouping 3 values in 5 bits. It will be reused by 
the E-AC-3 decoder.

Originally committed as revision 14527 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-03 21:42:43 +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
Justin Ruggles
227322b837 move rematrixing band table to ac3dec_data.c 
Originally committed as revision 13716 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-06-08 21:09:02 +00:00
Justin Ruggles
7ed9a2ea50 add ac3dec_data.[c,h] 
Originally committed as revision 13715 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-06-08 21:08:57 +00:00