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Commit Graph

288 Commits

Author SHA1 Message Date
Loren Merritt
afb46fc092 AC-3 decoder, soc revision 148, Sep 28 18:38:27 2006 UTC by banan
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
Justin Ruggles
de17eee70f AC-3 decoder, soc revision 109, Sep 22 22:42:54 2006 UTC by banan
Cosmetics.

Originally committed as revision 9671 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:05:13 +00:00
Justin Ruggles
1ea76064b4 AC-3 decoder, soc revision 72, Sep 7 04:20:00 2006 UTC by cloud9
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
c7cfc48f37 AC-3 decoder, soc revision 71, Sep 4 09:47:12 2006 UTC by cloud9
Redundant code cleanup.
Optimized dither generation.
Minor optimization in bit allocation.
Comments.

Originally committed as revision 9669 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:04:17 +00:00
Justin Ruggles
860fe8c908 AC-3 decoder, soc revision 70, Aug 31 18:04:23 2006 UTC by banan
Cosmetics, white space removal.

Originally committed as revision 9668 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:03:47 +00:00
Justin Ruggles
6dc5d71f97 AC-3 decoder, soc revision 69, Aug 31 07:12:56 2006 UTC by cloud9
Fix the bugs:
1. The quality of output because of incorrect windowing coefficients.
New code for window generation.

2. Dynrng values were reset where dynrng value is present in the first block,
but not in the subsequent block.

Originally committed as revision 9667 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:03:14 +00:00
Justin Ruggles
d7bcc4adcf AC-3 decoder, soc revision 58, Aug 19 14:20:45 2006 UTC by cloud9
Further optimizations.

Originally committed as revision 9666 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:02:32 +00:00
Justin Ruggles
1d0a6f5209 AC-3 decoder, soc revision 57, Aug 19 12:44:38 2006 UTC by cloud9
Optimization as suggested by Benjamin.

Originally committed as revision 9665 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:02:08 +00:00
Justin Ruggles
032732d49d AC-3 decoder, soc revision 56, Aug 17 14:21:58 2006 UTC by cloud9
Acknowledgements.

Originally committed as revision 9664 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:01:44 +00:00
Justin Ruggles
e6bca37c81 AC-3 decoder, soc revision 55, Aug 17 12:25:24 2006 UTC by cloud9
Remove more unnecessary headers.
Codec initialization changed to use name => argument notation.

Originally committed as revision 9663 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:01:14 +00:00
Justin Ruggles
3ff88ff45a AC-3 decoder, soc revision 54, Aug 17 09:13:08 2006 UTC by cloud9
Remove unnecessary header files.

Originally committed as revision 9662 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:00:38 +00:00
Justin Ruggles
262d8702a9 AC-3 decoder, soc revision 53, Aug 17 08:53:44 2006 UTC by cloud9
Converted the window from double to float.
Now sound produced is as good as sound produced by liba52.

Originally committed as revision 9661 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 16:00:05 +00:00
Justin Ruggles
67414da7f7 AC-3 decoder, soc revision 52, Aug 16 22:45:07 2006 UTC by cloud9
Reset the blksw and dithflag to 0 at the begining of each block.
Otherwise blockswitching propagates over multiple frames even if
block switching is not enabled for that frame.
Also reuse rematflg.

Originally committed as revision 9660 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 15:59:25 +00:00
Justin Ruggles
45b0ed13a8 AC-3 decoder, soc revision 48, Aug 16 11:27:49 2006 UTC by cloud9
I realized that the bug was not in the imdct routine but in the
get_transform_coeffs.
Fixed it.
Code now uses the ffmpeg's imdct routines.
All the mplayer's ac3 samples are decoded
successfully.
Also improved downmixing.
Now all the downmixing coeffcients for channels
are normalized such that the sum of coefficients
used to construct the output for single channel
never exceeds 1.0.

Originally committed as revision 9659 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 15:58:42 +00:00
Justin Ruggles
2fbbd087bb AC-3 decoder, soc revision 40, Aug 9 00:10:14 2006 UTC by cloud9
More code cleanup.
Window is now runtime generated.
Fixed the bugs in rematrixing routine and
in Decoding AC3 Bitstreams when coupling is in use.

Still struggling to find out what affects the quality of
the produced sound. Can anybody have a look at the
imdct routines do_imdct_256 and do_imdct_512 and tell me
whether it is the correctly implemented as described in
standard.

Originally committed as revision 9658 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 15:57:51 +00:00
Justin Ruggles
98a27a8a84 AC-3 decoder, soc revision 38, Aug 7 00:03:00 2006 UTC by cloud9
major code cleanup.
correct implementation of imdct.
implemented imdct for block switching also.
when coupling is not in use all the
ac3 streams are decoded correctly.
but when coupling is in use there is a bug.
i am currently finding the root of the bug.
if anybody can help.

Originally committed as revision 9657 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 15:56:55 +00:00
Justin Ruggles
41277578b9 AC-3 decoder, soc revision 34, Jul 18 14:27:54 2006 UTC by cloud9
working decoder
imdct for block switching is to be implemented
various other things to do

Originally committed as revision 9656 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 15:51:00 +00:00
Justin Ruggles
6bd4660cdb AC-3 decoder, soc revision 33, Jul 17 12:13:40 2006 UTC by cloud9
getting weired output
but its working

Originally committed as revision 9655 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 15:49:12 +00:00
Justin Ruggles
486637af8e AC-3 decoder, soc revision 32, Jul 17 09:37:32 2006 UTC by cloud9
Latest commit.
There is no error in parsing and or recovering transform coefficients.
Double checked with ac3dec.
Getting consistent results with the bit allocation routine and transform
coefficients.
The code is able to parse valid ac3 bitstreams without error from start
to end.
I have also implemented the imdct when block switching is not enabled.
However, can anybody provide an insight into how to convert float samples to
int16_t ? lrint is of no help cuz it produces output -1, 0 or 1 whereas the
output should be between -32768 to 32767.

Originally committed as revision 9654 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 15:48:28 +00:00
Justin Ruggles
0058584580 AC-3 decoder, soc revision 31, Jul 14 23:53:28 2006 UTC by cloud9
Removed _ from names
Removed temporary storage for the exponents
Removed ctx->samples
Now each transform coefficients are stored in audio block as an array of transform coefficients for each channel
added ctx->delay (output of later half of previous block)
added audio_block->block_output(output of this block)

I am still not able to produce the output.
I checked the code twice completely. I am not missing anything in
parsing or in bit allocation. Yet it throws error in getting transform
coefficients sometimes. Can anyone review a code of get_transform_coeffs and
help me debug it further. I think the error is in do_bit_allocation routine cuz
get_transform_coeffs is dependent on the bit allocation parameters table.

I have checked the bit allocation algorithm thoroughly and it is as defined in the
standard. Tried everything and got stuck where to go further.
Please help me.

Originally committed as revision 9653 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 15:42:15 +00:00
Justin Ruggles
1b29343731 AC-3 decoder, soc revision 26, Jul 5 04:55:15 2006 UTC by cloud9
Mersenne Twister
Dynamic Range
Downmixing
IMDCT

Originally committed as revision 9652 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 15:41:27 +00:00
Justin Ruggles
2aa2c5c4dd AC-3 decoder, soc revision 9, Jun 14 03:52:02 2006 UTC by cloud9
initial commit
NOTE: This and all subsequent ac3dec.c revisions from the soc repository
violate the GPL. This will be fixed after all soc revisions are imported.
This file is not compiled yet, so the license compliance of any builds in
the meantime will not be affected.

Originally committed as revision 9651 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-07-14 15:38:39 +00:00
Diego Biurrun
b7d3bfa6d3 Remove unused libac3 AC3 decoding interface.
Originally committed as revision 7923 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-02-11 12:27:11 +00:00
Diego Biurrun
b78e7197a8 Change license headers to say 'FFmpeg' instead of 'this program/this library'
and fix GPL/LGPL version mismatches.

Originally committed as revision 6577 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-07 15:30:46 +00:00
Diego Biurrun
5509bffa88 Update licensing information: The FSF changed postal address.
Originally committed as revision 4842 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-01-12 22:43:26 +00:00
Diego Biurrun
bb270c0896 COSMETICS: tabs --> spaces, some prettyprinting
Originally committed as revision 4764 to svn://svn.ffmpeg.org/ffmpeg/trunk
2005-12-22 01:10:11 +00:00
Diego Biurrun
115329f160 COSMETICS: Remove all trailing whitespace.
Originally committed as revision 4749 to svn://svn.ffmpeg.org/ffmpeg/trunk
2005-12-17 18:14:38 +00:00
Michael Niedermayer
95ae72b7e0 Compilation fixes part 1 patch by (Arvind R. and Burkhard Plaum, plaum, ipf uni-stuttgart de)
Originally committed as revision 4540 to svn://svn.ffmpeg.org/ffmpeg/trunk
2005-08-26 19:05:44 +00:00
Michael Niedermayer
53db1cae1c data_size = 0 cleanup
Originally committed as revision 3146 to svn://svn.ffmpeg.org/ffmpeg/trunk
2004-05-21 14:37:16 +00:00
Michael Niedermayer
983e3246b7 per file doxy
Originally committed as revision 1634 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-03-06 11:32:04 +00:00
Zdenek Kabelac
0c1a9edad4 * UINTX -> uintx_t INTX -> intx_t
Originally committed as revision 1578 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-02-11 16:35:48 +00:00
Fabrice Bellard
ff4ec49e64 license/copyright change
Originally committed as revision 599 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-05-25 22:45:33 +00:00
Zdenek Kabelac
076b09e9b3 * minor - slightly modified debug message
Originally committed as revision 401 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-04-15 12:52:21 +00:00
Juanjo
e0d2714adc - Fixed AC3 decoding for 5:1 AC3 streams. Now when calling av_audio_decode for
AC3 set avcodec_context->channels to the desired number channels, if the
setting is 0 AC3 decoder will set it to the channels found in the
stream.
- Changed ffmpeg to cope with the new "way" of AC3 decoding.
- ASF muxer now uses Tickers for PTS calculations.

Originally committed as revision 393 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-04-09 04:52:49 +00:00
Zdenek Kabelac
30b68f33aa * encoding of AC3 with more than 2 channels
by Takashi Iwai <tiwai@suse.de>

Originally committed as revision 383 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-04-08 12:08:03 +00:00
Fabrice Bellard
1a56543279 win32 fixes
Originally committed as revision 84 to svn://svn.ffmpeg.org/ffmpeg/trunk
2001-08-13 21:48:05 +00:00
Fabrice Bellard
d771bcae33 added CONFIG_AC3, CONFIG_MPGLIB, CONFIG_DECODERS and CONFIG_ENCODERS (Arpi: don't forget to put CONFIG_DECODERS in mplayer)
Originally committed as revision 9 to svn://svn.ffmpeg.org/ffmpeg/trunk
2001-07-23 20:58:31 +00:00
Fabrice Bellard
de6d9b6404 Initial revision
Originally committed as revision 5 to svn://svn.ffmpeg.org/ffmpeg/trunk
2001-07-22 14:18:56 +00:00