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26 Commits

Author SHA1 Message Date
Thilo Borgmann d814a839ac Reinstate proper FFmpeg license for all files. 2013-08-30 15:47:38 +00:00
Justin Ruggles d5a7229ba4 Add a float DSP framework to libavutil 
Move vector_fmul() from DSPContext to AVFloatDSPContext.
 2012-06-08 13:14:38 -04:00
Justin Ruggles aa872af5e3 ac3enc: update to AVCodec.encode2() 
Update FATE references due to encoder delay.
 2012-03-20 18:46:56 -04:00
Mans Rullgard cc276c85d1 Make channel layout masks unsigned 
It makes more sense for a bit mask to use an unsigned type.
The change should be source and binary compatible on all
supported systems, hence micro version bump.

Fixes a few invalid shifts.

Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-11-25 13:19:54 +00:00
John Stebbins 5f3fb59953 fix AC3ENC_OPT_MODE_ON/OFF 
The values were reversed.

Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
 2011-10-11 14:57:58 -04:00
Justin Ruggles ae264bb29b ac3enc: Add channel coupling support for the fixed-point AC-3 encoder. 
Update FATE references accordingly.
 2011-09-05 10:09:44 -04:00
Justin Ruggles c766eb1ce1 ac3enc: add macros for option names to make them more understandable. 2011-08-11 11:33:32 -04:00
Justin Ruggles c3d63262fe ac3enc: allow new coupling coordinates to be sent independently for each 
channel.
 2011-08-09 16:44:34 -04:00
Justin Ruggles d55ad59a8a ac3enc: separate exponent bit counting from exponent grouping. 
Move bit counting to the bit allocation function. Move exponent grouping to
after bit allocation. This will allow for adjustment of bandwidth parameters
during bit allocation without having to do exponent grouping multiple times.
 2011-08-09 16:28:18 -04:00
Justin Ruggles 1bca72e1bd eac3enc: support writing of basic mixing and info metadata 2011-07-27 11:51:46 -04:00
Justin Ruggles be7bd626c4 eac3enc: use different numbers of blocks per frame to allow higher bitrates 2011-07-21 14:57:10 -04:00
Justin Ruggles 08a747afb9 eac3enc: use frame exponent strategy when applicable. 
This checks if the set of selected exponent strategies for all blocks in a
channel are in the frame exponent strategy table, and if so, writes the
table index instead of each strategy. This saves up to 7 bits per channel per
frame, so the overall effect on quality is small.
 2011-07-19 14:15:00 -04:00
Justin Ruggles b5849f7709 ac3enc: merge AC3MDCTContext with AC3EncodeContext. 
Since both the fixed-point and floating-point encoders use the FFTContext,
this no longer needs to be in a separate context. Also, when a short-transform
context is added, the same MDCT window will be used.
 2011-07-13 16:55:28 -04:00
Justin Ruggles 82cea7cb6c ac3enc: prefer passing AC3EncodeContext rather than AVCodecContext 2011-07-13 16:55:28 -04:00
Justin Ruggles 523b7eba19 ac3enc: clip coefficients after MDCT. 
This ensures that any processing between the MDCT and exponent extraction will
be using clipped coefficients.
 2011-07-01 13:02:11 -04:00
Justin Ruggles 8683c6a638 ac3enc: move ff_ac3_encode_frame() to ac3enc_template.c 
This avoids using function pointers for quite a few small functions, most of
which just call DSP functions.
 2011-06-27 12:59:39 -04:00
Justin Ruggles 0e4dbe2996 ac3enc: avoid masking output in asym_quant() by using signed values for 
quantized mantissas.
 2011-06-22 12:18:10 -04:00
Justin Ruggles 99477adc31 ac3enc: fix allocation of floating point samples. 
sizeof(SampleType) is different for fixed and float encoders.
 2011-06-13 17:49:37 -04:00
Justin Ruggles 38c304addd ac3enc: remove empty ac3_float function that is never called 2011-06-13 16:49:35 -04:00
Justin Ruggles e0cc66df61 ac3enc: split templated float vs. fixed functions into a separate file. 
Function pointers are used for templated functions instead of needlessly
duplicating many functions.
 2011-06-13 16:49:35 -04:00
Justin Ruggles e754dfc0bb ac3enc: dynamically allocate AC3EncodeContext fields windowed_samples and mdct 
This will allow the same struct to be used for both the fixed and float ac3
encoders.
 2011-06-13 16:49:35 -04:00
Justin Ruggles 36151b3e31 ac3enc: use function pointer to choose between AC-3 and E-AC-3 header output 
functions.
 2011-06-13 16:49:35 -04:00
Justin Ruggles c8e9ea43d0 Move E-AC-3 encoder functions to a separate eac3enc.c file. 2011-06-07 15:16:41 -04:00
Fabrice Bellard 6107fa87b4 preparing integration of new AC3 decoder 
Originally committed as revision 1089 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2002-10-28 00:39:05 +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 de6d9b6404 Initial revision 
Originally committed as revision 5 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2001-07-22 14:18:56 +00:00