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126 Commits

Author SHA1 Message Date
Justin Ruggles
2fc24b3273 alac: remove a duplicate local variable 2012-07-19 13:26:46 -04:00
Justin Ruggles
5177413d20 alac: conditionally set sign_modifier to 1 
It is already unconditionally set to 0 prior to this, so we can modify it
only when needed.
 2012-07-19 13:26:46 -04:00
Justin Ruggles
7e6593e977 alac: eliminate 2 unneeded local variables in bastardized_rice_decompress() 
x_modified is just unnecessary, and final_val can be removed by simplifying
the unsigned-to-signed conversion.
 2012-07-19 13:26:46 -04:00
Justin Ruggles
6fd8a28b59 alac: adjust conditions for updating entropy decoder history 
avoids some unnecessary arithmetic in certain situations
 2012-07-19 13:26:46 -04:00
Justin Ruggles
a06fdadd97 alac: cosmetics: reindent after last commit 2012-07-19 13:26:46 -04:00
Justin Ruggles
d9837434a9 alac: limit the rice param before passing to decode_scalar() 
reduces the number of parameters to decode_scalar() and slightly simplifies
the code
 2012-07-19 13:26:45 -04:00
Justin Ruggles
6e91f62256 alac: reduce the number of parameters to bastardized_rice_decompress() 
Use the ALACContext fields directly instead.
 2012-07-19 13:26:45 -04:00
Justin Ruggles
836e8b9ba0 alac: cosmetics: rename some ALACContext parameters 2012-07-19 13:26:45 -04:00
Justin Ruggles
2ac1737583 alac: clean up and update comments leftover from reverse-engineering 2012-07-19 13:26:45 -04:00
Martin Storsjö
00c3b67b8a cosmetics: Align codec declarations 
Also break some long lines, remove codec function placeholder comments
and add spaces in sample/pixel format lists.

Signed-off-by: Martin Storsjö <martin@martin.st>
 2012-04-06 22:37:38 +03:00
Ronald S. Bultje
c3bbd0b53b alac: convert extradata reading to bytestream2. 2012-03-25 13:35:05 -07:00
Justin Ruggles
e49d21306a alacdec: implement the 2-pass prediction type. 
The reference encoder does not generate any streams using this, but the
reference decoder can handle it, so we should as well.
 2012-01-03 13:15:24 -05:00
Justin Ruggles
e76c7b856f alacdec: fill in missing or guessed info about the extradata format. 
Now that there is official documentation from Apple about this, we don't have
to guess anymore.
 2012-01-03 13:15:23 -05:00
Justin Ruggles
0eea212943 Add avcodec_decode_audio4(). 
Deprecate avcodec_decode_audio3().
Implement audio support in avcodec_default_get_buffer().
Implement the new audio decoder API in all audio decoders.
 2011-12-02 17:40:40 -05:00
Justin Ruggles
30f3e7b524 alacdec: remove unneeded NULL or zero-size packet checks. 
This is already done in avcodec_decode_audio3()
 2011-10-26 11:50:17 -04:00
Justin Ruggles
68f7e9cd8e alacdec: simplify buffer allocation by using FF_ALLOC_OR_GOTO() 2011-10-26 11:50:17 -04:00
Justin Ruggles
b316af7a7c alacdec: ask for a sample for unsupported sample depths. 
Also return AVERROR_PATCHWELCOME.
 2011-10-26 11:50:17 -04:00
Justin Ruggles
63cf54df7a alacdec: cosmetics: use 'ch' instead of 'chan' to iterate channels 2011-10-26 11:50:17 -04:00
Justin Ruggles
01200f1283 alacdec: move some declarations to the top of the function 2011-10-26 11:50:17 -04:00
Justin Ruggles
c3a92412c0 alacdec: always use get_sbits_long() for uncompressed samples 2011-10-26 11:50:17 -04:00
Justin Ruggles
b46e58f741 alacdec: remove unneeded local variable 2011-10-26 11:50:17 -04:00
Justin Ruggles
7080533cda alacdec: remove the numchannels parameter from several functions. 
They only operate on stereo content, so the extra param is not necessary and
also allows for simplifying the code.
 2011-10-26 11:50:17 -04:00
Justin Ruggles
cb50329fc5 alacdec: rename 2 functions. 
Now they only do stereo interleaving.
 2011-10-26 11:50:16 -04:00
Justin Ruggles
c39bddd392 alacdec: move appending of extra_bits to a separate function. 
This should also fix decoding of mono 24-bit.
 2011-10-26 11:50:16 -04:00
Justin Ruggles
e739d35156 alacdec: split stereo decorrelation into a separate function. 
It is identical for 16-bit and 24-bit, so there is no need to have duplicate
code.
 2011-10-26 11:50:16 -04:00
Justin Ruggles
d251c85dce alacdec: cosmetics: rename 'wasted_bits' to 'extra_bits'. 
The bits are not wasted, they are additional low bits that are added to the
16-bit decompressed samples to increase the output sample depth.
 2011-10-26 11:50:16 -04:00
Justin Ruggles
dbbb9262ca alacdec: remove unneeded numsamples checks 2011-10-26 11:50:16 -04:00
Justin Ruggles
53df079a73 alacdec: check for buffer allocation failure. 
Also rearranges some functions for easier cleanup on failure.
 2011-10-26 11:50:16 -04:00
Justin Ruggles
e5e4f92b5c alacdec: allocate per-channel buffers based on channel count. 
reduces memory usage when the stream has fewer than MAX_CHANNELS
 2011-10-26 11:50:16 -04:00
Justin Ruggles
dcaa83a0fc alacdec: read/validate number of channels from the extradata. 
check frame header channel count against header/container channel count.
 2011-10-26 11:50:16 -04:00
Justin Ruggles
47e9c75b36 alacdec: remove unneeded validation of setinfo_sample_size. 
It is already done when using it to set sample_fmt.
 2011-10-26 11:50:16 -04:00
Justin Ruggles
0f26f3d5c4 alacdec: set sample_fmt in alac_decode_init() 2011-10-26 11:50:16 -04:00
Justin Ruggles
aec8383348 alacdec: set bytespersample using av_get_bytes_per_sample() 2011-10-26 11:50:15 -04:00
Anton Khirnov
ec6402b7c5 lavc: use designated initialisers for all codecs. 
It's more readable and less prone to breakage.
 2011-07-29 08:42:34 +02:00
Diego Biurrun
8b587fa292 alac: Remove unused dummy code. 2011-07-16 01:21:17 +02:00
Diego Biurrun
ad4cd0c2a4 doxygen: use Doxygen markup for authors and web links where appropriate 2011-07-15 02:01:21 +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
Diego Elio Pettenò
d36beb3f69 Add ff_ prefix to data symbols of encoders, decoders, hwaccel, parsers, bsf. 
None of these symbols should be accessed directly, so declare them as
hidden.

Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-01-26 16:08:45 +00:00
Stefano Sabatini
5d6e4c160a Replace deprecated symbols SAMPLE_FMT_* with AV_SAMPLE_FMT_*, and enum 
SampleFormat with AVSampleFormat.

Originally committed as revision 25730 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-11-12 11:04:40 +00:00
Jason Garrett-Glaser
313b52fbff Clean up ALACdec 
Do decode init in the init function instead of at the first frame.
Fix some possible crash cases.

Originally committed as revision 25572 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-10-26 07:20:51 +00:00
Måns Rullgård
986f143a38 alac: change VLAs to fixed size 
Originally committed as revision 23751 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-06-24 08:26:40 +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
Stefano Sabatini
72415b2adb Define AVMediaType enum, and use it instead of enum CodecType, which 
is deprecated and will be dropped at the next major bump.

Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-03-30 23:30:55 +00:00
Jai Menon
f6d2916550 Avoid using an intermediate variable. 
Originally committed as revision 21656 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-02-06 12:52:22 +00:00
Jai Menon
b53ae8b6b1 Remove redundant use of numchannels since it is 1 for mono. 
Originally committed as revision 21655 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-02-06 12:48:37 +00:00
Jai Menon
e243eee43f alac.c : Use av_freep instead of av_free. 
Originally committed as revision 21654 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-02-06 12:38:42 +00:00
Jai Menon
f430c7b6ac Add ALAC 24 bps decoding support. 
Originally committed as revision 21637 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-02-04 16:21:26 +00:00
Stefano Sabatini
9106a698e7 Rename bitstream.h to get_bits.h. 
Originally committed as revision 18494 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-13 16:20:26 +00:00
Thilo Borgmann
7a00bbad21 Implement avcodec_decode_video2(), _audio3() and _subtitle2() which takes an 
AVPacket argument rather than a const uint8_t *buf + int buf_size. This allows
passing of packet-specific flags from demuxer to decoder, such as the keyframe
flag, which appears necessary to playback corePNG P-frames.

Patch by Thilo Borgmann thilo.borgmann googlemail com, see also the thread
"Google Summer of Code participation" on the mailinglist.

Originally committed as revision 18351 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-07 15:59:50 +00:00
Justin Ruggles
6053da0182 alacdec: Simplify reading of uncompressed samples by using 
get_sbits_long().

Originally committed as revision 17744 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-03-03 04:57:02 +00:00