d8870f120e
use scale factor instead of sum for downmix level adjustment. avoids division
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inside downmix loop. 7% faster 5.1-to-stereo downmixing.
Originally committed as revision 12287 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-03-01 16:10:19 +00:00
9d10e6e6c0
pre-calculate downmix coefficient sums. 2% faster 5.1-to-stereo downmixing.
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Originally committed as revision 12286 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-03-01 15:48:18 +00:00
a4de6dd2c1
Use 24-bit fixed-point transform coefficients until just before MDCT. This
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gives 7% faster decoding on average.
Originally committed as revision 12284 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-03-01 04:39:39 +00:00
3ed546fe52
Add variable alpha and size of half window for Kaiser-Bessel Derived window
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generation. Hard code Bessel I0 approximation iterations to 50.
See thread for discussion:
[FFmpeg-devel] [PATCH] Move Kaiser-Bessel Derived window to mdct.c
Started on the 2008/01/10
Originally committed as revision 11520 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-13 11:02:08 +00:00
4eb7a735cb
Make the Kaiser-Bessel window generator a common function
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Patch by Robert Swain, robert d swain a gmail d com
Originally committed as revision 11514 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-12 11:11:19 +00:00
f34b221bd2
used defined name for testing error resilience level
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Originally committed as revision 11478 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-08 23:44:48 +00:00
f0b3a7ba12
split out init of downmix coeffs into a separate function that can be called
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only when needed
Originally committed as revision 11441 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-07 00:18:02 +00:00
82a6c4811a
remove unneeded variable from AC3DecodeContext
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Originally committed as revision 11439 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-06 23:56:19 +00:00
4bc829bb8f
make sure that the last coupling band stops at the end of the coupling range
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Originally committed as revision 11438 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-06 23:33:30 +00:00
b02fbf7536
fix phase flag processing for the case when coupling coordinates are reused
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for the right channel, but new for the left channel
Originally committed as revision 11436 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-06 20:15:24 +00:00
646800f79c
move E-AC3 header parsing to ff_ac3_parse_header()
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Originally committed as revision 11420 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-05 18:39:55 +00:00
86ad4c7e1b
remove unneeded variables from AC3HeaderInfo
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Originally committed as revision 11419 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-05 17:04:57 +00:00
2816d32310
cosmetics: indentation
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Originally committed as revision 11416 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-05 15:23:39 +00:00
95283c1701
check for request_channels at codec init
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Originally committed as revision 11415 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-05 15:22:53 +00:00
3abe5fbdc4
improve CRC API
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- don't export any global var
- provide either generated or hardcoded tables
Originally committed as revision 11409 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-04 23:09:58 +00:00
7564658bbc
cosmetics: indentation and add a TODO comment
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Originally committed as revision 11389 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-04 00:39:03 +00:00
471db688c6
only check ac3 crc if AVCodecContext.error_resilience > 0
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Originally committed as revision 11388 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-03 23:05:53 +00:00
d6939960d5
add crc check to ac3 decoder
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Originally committed as revision 11379 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-03 02:26:29 +00:00
12eaa3b760
simplify
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Originally committed as revision 11360 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-30 22:58:20 +00:00
b35c67e58b
pass an AC3DecodeContext to ac3_downmix() instead of multiple arguments
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Originally committed as revision 11359 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-30 22:28:17 +00:00
866181e5e8
cosmetics: rename sampling_rate to sample_rate
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Originally committed as revision 11358 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-30 21:26:30 +00:00
0345fade94
do not need to cast a (void *)
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Originally committed as revision 11357 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-30 21:24:49 +00:00
1b70d88b7a
cosmetics: vertical realignment after last commit
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Originally committed as revision 11356 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-30 21:09:08 +00:00
d802d7ca12
cosmetics: rename all AC3DecodeContext variables from ctx to s
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Originally committed as revision 11355 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-30 20:58:50 +00:00
23c8cb89c9
cosmetics: rename GetBitContext gb to gbc
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Originally committed as revision 11354 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-30 20:47:22 +00:00
005ab694ae
remove unused context variable
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Originally committed as revision 11353 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-30 03:10:18 +00:00
1408352ada
Add option for user to scale the amount of dynamic range compression which is
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applied by the audio decoder, and use that option in the AC3 decoder.
Originally committed as revision 11280 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-20 00:55:08 +00:00
03726b7042
Skip dialog normalization. It shouldn't be used by the decoder, and there is
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not currently a clean way to pass the value to the user.
Originally committed as revision 11246 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-17 01:09:00 +00:00
224bc440b2
Revert commit made in revision 11228. I'm getting some strange results in the
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downmixed output that I can't quite figure out.
Originally committed as revision 11245 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-17 01:03:19 +00:00
b40211ff67
downmix before the IMDCT if no block switching is used
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Originally committed as revision 11228 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-16 04:25:50 +00:00
6708eefe55
Make AC3 decoder honor avctx->request_channels
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Originally committed as revision 11220 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-15 07:00:19 +00:00
e2270b4e1e
cosmetics: rename ac3 decoder variables
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Originally committed as revision 11197 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-09 03:28:10 +00:00
e59cc20593
cosmetics: rename common ac3 variables
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Originally committed as revision 11196 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-09 03:27:14 +00:00
5ce2134258
cosmetics: rename ac3 bit allocation variables
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Originally committed as revision 11194 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-09 03:23:04 +00:00
66ecf18e38
cosmetics: rename ac3 tables
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Originally committed as revision 11193 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-09 03:21:33 +00:00
56cc85a068
Misc spelling fixes, prefer American over British English.
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Originally committed as revision 11126 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-12-02 15:43:08 +00:00
a135bea507
skip incomplete frames
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Originally committed as revision 10497 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-09-15 02:44:28 +00:00
3df880934e
better AC3 header error reporting
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Originally committed as revision 10496 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-09-15 02:41:24 +00:00
d5b7144e1f
fix random dithering of zero-bit mantissas
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Originally committed as revision 10495 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-09-15 00:43:40 +00:00
bfcf690c68
cosmetics: rename variables. tbl->tab for consistency with other AC3 tables
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Originally committed as revision 10494 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-09-15 00:19:21 +00:00
396a6ee50e
fix decoding of DolbyNet AC3
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Originally committed as revision 10493 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-09-15 00:00:57 +00:00
222ae64c3d
cosmetics: vertical alignment
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Originally committed as revision 10002 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-09 00:39:35 +00:00
5066f51502
comments modification: add, clean up, Doxygenize, and reword
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Originally committed as revision 10001 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-09 00:36:49 +00:00
f5cefb21d5
cosmetics: blank lines, remove some comments
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Originally committed as revision 9955 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-05 21:48:46 +00:00
82758fd690
add pointer to the parent context for use with av_log()
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Originally committed as revision 9954 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-05 21:34:33 +00:00
77416325cb
use array for dynamic range scaling factors
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Originally committed as revision 9953 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-05 21:10:09 +00:00
01f354531d
add dialogue normalization
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Originally committed as revision 9948 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-05 19:36:35 +00:00
3bbb0bf82c
add support for downmixing to stereo or mono
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Originally committed as revision 9916 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 22:32:17 +00:00
4e09232070
use dsputil for float to signed 16-bit sample conversion
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Originally committed as revision 9914 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 20:59:22 +00:00
775369e028
cosmetics: indentation
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Originally committed as revision 9911 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 20:32:57 +00:00
7b4076a777
consolidate decoding of lfe and coupling channels with decoding of full-bandwidth channels.
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Originally committed as revision 9910 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 19:19:48 +00:00
5e61de0cc1
there are only 4 rematrixing bands
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Originally committed as revision 9908 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 15:01:21 +00:00
75b9b0369b
cosmetics: use more appropriate names for iterator variables.
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Originally committed as revision 9907 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 13:52:56 +00:00
8e2eb3b674
move some variables to a more local scope.
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Originally committed as revision 9905 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 13:30:37 +00:00
0bff58a59a
make exponent decoding consistent (prepare for merging coupling and lfe code with normal channel code).
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Originally committed as revision 9904 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 13:26:46 +00:00
eaf84d970f
cosmetics: use braces when it makes the code easier to read.
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Originally committed as revision 9893 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 12:04:41 +00:00
fc59010bbf
change AC3DecodeContext variable to local variable
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Originally committed as revision 9892 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 11:55:10 +00:00
6d96d626c6
use array instead of bitmask
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Originally committed as revision 9891 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 11:39:47 +00:00
3357ff338b
use table for converting dynamic range codes to scale factors
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Originally committed as revision 9889 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 03:27:05 +00:00
5aefe3ebef
use floating-point mantissa dequantization tables
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Originally committed as revision 9888 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 03:21:17 +00:00
04ac5cada1
cosmetics: indentation
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Originally committed as revision 9887 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 01:14:14 +00:00
60f07fadd3
dither zero-bit mantissas by default. remove dithering only if it's explicitly turned off.
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Originally committed as revision 9886 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 01:13:08 +00:00
d63f6fea50
simplify coefficient decoding
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Originally committed as revision 9884 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 00:12:23 +00:00
285bf28c67
merge decoding of coupling channel coefficients and regular channel coefficients
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Originally committed as revision 9883 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-04 00:04:17 +00:00
d7dc7ad05c
split out coupling coefficient reconstruction into a separate function
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Originally committed as revision 9882 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-03 23:53:53 +00:00
dfd57c366f
align array used in mdct. fixes segfault.
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Originally committed as revision 9848 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-08-01 01:13:58 +00:00
8b60bbbf5b
simplify stereo rematrixing
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Originally committed as revision 9824 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-29 00:58:32 +00:00
b6acc57f88
change 2 fields from context to local variables
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Originally committed as revision 9823 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-29 00:35:30 +00:00
8fbb368d2c
BLOCK_SIZE is not used properly, just use numbers instead to avoid confusion
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Originally committed as revision 9822 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-28 20:50:25 +00:00
7bfd22f25a
remove broken downmixing. will add new implementation later.
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Originally committed as revision 9821 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-28 19:33:19 +00:00
4611b64ec1
simplify snr offset and bit allocation
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Originally committed as revision 9784 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-24 02:08:27 +00:00
e9a3824880
only use sized data types when necessary
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Originally committed as revision 9783 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-24 01:43:47 +00:00
8f58a4c943
set bit allocation parameters directly instead of copying
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Originally committed as revision 9782 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-24 01:35:25 +00:00
e2cd6686fa
use enum value instead of numerical value for acmod
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Originally committed as revision 9781 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-23 22:47:49 +00:00
bc8edb7e53
use consistent data type for exponents. needs to be int8_t to pass to bit allocation.
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Originally committed as revision 9780 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-23 22:23:37 +00:00
878c40a137
change some bit masks to arrays
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Originally committed as revision 9779 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-23 22:16:15 +00:00
bec37145da
cosmetics: indentation
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Originally committed as revision 9774 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-21 17:03:30 +00:00
9fc1ab722e
Use shared AC-3 header parsing. Move some initializations to block parsing function.
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Originally committed as revision 9773 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-21 16:28:12 +00:00
9ef6039043
don't need to synchronize in the decoder. the parser does that already.
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Originally committed as revision 9772 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-21 13:56:04 +00:00
de34875c75
get rid of an ugly macro
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Originally committed as revision 9771 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-21 11:54:19 +00:00
614e9b2424
don't need to define ALT_BITSTREAM_READER
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Originally committed as revision 9752 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-19 02:21:14 +00:00
362664215d
update license header. add copyright for myself. correct and complete the statement about liba52.
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Originally committed as revision 9751 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-19 02:16:20 +00:00
3bb004fcda
revise comment for exponent decoding function
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Originally committed as revision 9750 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-19 02:09:58 +00:00
4415076f55
new implementation of exponent decoding
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Originally committed as revision 9749 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-19 02:04:05 +00:00
d699d38393
cosmetics: indentation
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Originally committed as revision 9748 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-19 00:51:19 +00:00
0ce668015f
remove portions of bit allocation which are no longer needed since they are shared with the encoder
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Originally committed as revision 9747 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-19 00:50:31 +00:00
0de73a46ff
fix the 256-point MDCT
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Originally committed as revision 9685 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-15 14:47:39 +00:00
623b79435d
use shared ac3 bit allocation function
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Originally committed as revision 9684 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-15 13:53:42 +00:00
fa67992dea
no need for the decoder to have the license as a prefix
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Originally committed as revision 9682 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-15 01:38:13 +00:00
76d357fd23
remove a debugging function and variable, and remove the commented-out code which uses them.
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Originally committed as revision 9681 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-15 01:35:46 +00:00
a39532b0d9
ABS -> FFABS
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Originally committed as revision 9680 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-15 01:32:04 +00:00
cc2a8443eb
move some common values to ac3.h and utilize them
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Originally committed as revision 9679 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-15 01:31:09 +00:00
cb503702ee
use random number generator from libavutil
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Originally committed as revision 9678 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 23:57:05 +00:00
9d10960194
10l to me. I accidentally removed a word.
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Originally committed as revision 9677 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 22:17:23 +00:00
0ec2cc35f7
revise license header for simplicity and consistency
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Originally committed as revision 9676 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 18:53:56 +00:00
283614b5fc
make ac3dec.c GPL until violations are fixed
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Originally committed as revision 9674 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:07:56 +00:00
967d397a6c
AC-3 decoder, soc revision 402, Jul 14 13:45:14 2007 UTC by jbr
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merge ac3_decoder.h into ac3_decoder.c
Originally committed as revision 9673 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:06:14 +00:00
afb46fc092
AC-3 decoder, soc revision 148, Sep 28 18:38:27 2006 UTC by banan
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Enable sse imdct, patch by Loren Merrit.
Originally committed as revision 9672 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:05:39 +00:00
de17eee70f
AC-3 decoder, soc revision 109, Sep 22 22:42:54 2006 UTC by banan
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Cosmetics.
Originally committed as revision 9671 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:05:13 +00:00
1ea76064b4
AC-3 decoder, soc revision 72, Sep 7 04:20:00 2006 UTC by cloud9
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fix short block imdct.
Originally committed as revision 9670 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:04:40 +00:00
Justin Ruggles
Robert Swain
Aurelien Jacobs
Andreas Öman
Diego Biurrun
Loren Merritt