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3 Commits

Author SHA1 Message Date
Justin Ruggles dc7e07ac1f Add stereo rematrixing support to the AC-3 encoders. 
This improves the audio quality significantly for stereo source with both the
fixed-point and floating-point AC-3 encoders.
Update acodec-ac3_fixed and seek-ac3_rm test references.

Originally committed as revision 26271 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2011-01-08 23:21:17 +00:00
Justin Ruggles ac05f9030e Convert floating-point MDCT coefficients to 24-bit fixed-point all at once 
instead of doing it separately in 2 different functions.
This makes float AC-3 encoding approx. 3-7% faster overall.
Also, the coefficient conversion can now be easily SIMD-optimized.

Originally committed as revision 26232 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2011-01-05 20:35:36 +00:00
Justin Ruggles ad6b2c1f6d Move fixed-point parts of the AC-3 encoder to separate files. 
Originally committed as revision 26206 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2011-01-03 16:08:56 +00:00