Justin Ruggles
7f3a7b5c40
ac3enc: add channel coupling support
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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
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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.
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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.
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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.
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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
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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.
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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
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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
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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
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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
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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.
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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
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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
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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.
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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
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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.
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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.
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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_*
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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
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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
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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
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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]
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Originally committed as revision 13715 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-06-08 21:08:57 +00:00
