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* ac3enc: do not right-shift fixed-point coefficients in the final MDCT stage.Justin2011-03-14
| | | | | | | | | This increases the accuracy of coefficients, leading to improved quality. Rescaling of the coefficients to full 25-bit accuracy is done rather than offsetting the exponent values. This requires coefficient scaling to be done before determining the rematrixing strategy. Also, the rematrixing strategy calculation must use 64-bit math to prevent overflow due to the higher precision coefficients.
* ac3enc: fix bug in stereo rematrixing decision.Justin Ruggles2011-02-16
| | | | | | | The rematrixing strategy reuse flags are not reset between frames, so they need to be initialized for all blocks, not just block 0. Signed-off-by: Mans Rullgard <mans@mansr.com>
* ac3enc: change default floor code to 7.Justin Ruggles2011-02-15
| | | | | | | This is to match the value in every (E-)AC-3 file from commercial sources. It has a negligible effect on audio quality. Signed-off-by: Mans Rullgard <mans@mansr.com>
* ac3enc: Change EXP_DIFF_THRESHOLD to 500.Justin Ruggles2011-02-02
| | | | | | | | | This patch changes the exponent difference threshold in the exponent strategy decision function of the AC-3 encoder. I tested lowering in increments of 100. From 1000 down to 500 generally increased in quality with each step, but 400 was generally much worse. Signed-off-by: Mans Rullgard <mans@mansr.com>
* Add stereo rematrixing support to the AC-3 encoders.Justin Ruggles2011-01-08
| | | | | | | | 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
* Change the AC-3 encoder to use floating-point.Justin Ruggles2011-01-04
| | | | | | | | Fixed-point AC-3 encoder renamed to ac3_fixed. Regression test acodec-ac3 renamed to acodec-ac3_fixed. Regression test lavf-rm changed to use ac3_fixed encoder. Originally committed as revision 26209 to svn://svn.ffmpeg.org/ffmpeg/trunk
* Change the default dB-per-bit code from 2 to 3.Justin Ruggles2010-12-29
| | | | | | | | | | | | This gives slightly better quality in PEAQ tests. Code 3 gives a dBpb value of 2816 = -132dB (128 psd units = -6dB), which corresponds to 22 bits. Since the exponents have an offset applied, the 16-bit source looks like 24-bit source to the bit allocation routine. So using dBpb code=3 is a closer match to the exponent range. Regression test refs updated for acodec-ac3, lavf-rm, and seek-ac3_rm. Originally committed as revision 26144 to svn://svn.ffmpeg.org/ffmpeg/trunk
* Change FIX15() back to clipping to -32767..32767.Justin Ruggles2010-12-21
| | | | | | | | This avoids a 16-bit overflow in mdct512() due to a -32768 value in costab. References updated for acodec-ac3, lavf-rm, and seek-ac3_rm tests. Thanks to Måns Rullgård for finding the bug. Originally committed as revision 26071 to svn://svn.ffmpeg.org/ffmpeg/trunk
* Simplify fix15().Justin Ruggles2010-12-14
| | | | | | | | Turn it into 2 macros, and use av_clip_int16() and lrintf(). This matches the int16 to float sample conversion in audioconvert.c. The regression test output is different due to lrintf() rounding. Originally committed as revision 25956 to svn://svn.ffmpeg.org/ffmpeg/trunk
* Set a constant frame size for encoding G.726 audio.Justin Ruggles2010-09-11
| | | | Originally committed as revision 25107 to svn://svn.ffmpeg.org/ffmpeg/trunk
* tiny_psnr: skip wav headers on input filesMåns Rullgård2010-07-09
| | | | | | | | | | The byte count printed excludes the header, and offsets are applied after the the headers are skipped. Reference files updated to reflect new output. Some stddev/psnr values have changed slightly due to headers no longer being compared. Originally committed as revision 24143 to svn://svn.ffmpeg.org/ffmpeg/trunk
* tiny_psnr: print max absolute difference between filesVitor Sessak2010-07-09
| | | | | | | | | Regression test reference updates are due to the extra output from tiny_psnr. Patch by Vitor Sessak Originally committed as revision 24132 to svn://svn.ffmpeg.org/ffmpeg/trunk
* matroskaenc: Don't write a second seekhead for the clusters; mkvalidate agreesDavid Conrad2010-06-04
| | | | | | with me that it's unnecessary. Originally committed as revision 23478 to svn://svn.ffmpeg.org/ffmpeg/trunk
* matroskaenc: Mux clusters betterJames Zern2010-06-04
| | | | | | | | | | Start them on keyframes when reasonable, and delay writing audio packets to help ensure that there's audio samples available for the first frame in clusters. Patch by James Zern <jzern at google> Originally committed as revision 23473 to svn://svn.ffmpeg.org/ffmpeg/trunk
* Update regression tests after removing track timecode scale from mkvencDavid Conrad2010-05-22
| | | | Originally committed as revision 23248 to svn://svn.ffmpeg.org/ffmpeg/trunk
* Add VorbisComment writing to FLAC files.James Darnley2010-03-20
| | | | | | Patch by James Darnley <james darnley at gmail>. Originally committed as revision 22605 to svn://svn.ffmpeg.org/ffmpeg/trunk
* Simplify starting and ending clustersDavid Conrad2010-03-04
| | | | Originally committed as revision 22199 to svn://svn.ffmpeg.org/ffmpeg/trunk
* Place regression test output files in subdirs per familyMåns Rullgård2010-03-02
| | | | Originally committed as revision 22155 to svn://svn.ffmpeg.org/ffmpeg/trunk
* Separate audio-only tests so they are only run onceMåns Rullgård2010-01-30
Originally committed as revision 21556 to svn://svn.ffmpeg.org/ffmpeg/trunk
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