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
