adpcmenc: fix QT IMA ADPCM encoderSigned-off-by: Michael Niedermayer <email@example.com>
adpcmdec: Fix QT IMA ADPCM decoderSigned-off-by: Michael Niedermayer <firstname.lastname@example.org>
ac3enc: correct the flipped sign in the ac3_fixed encoder
matroskaenc: don't write an empty Cues element.
ac3enc: select bandwidth based on bit rate, sample rate, and number offull-bandwidth channels.
This reduces high-frequency artifacts and improves the quality of the lowerfrequency audio at low bit rates.
ac3enc: use generic fixed-point mdct
This makes the AC3 encoder use the shared fixed-point MDCT ratherthan its own implementation. The checksum changes are due todifferent rounding in the MDCT.
Signed-off-by: Mans Rullgard <email@example.com>
Add apply_window_int16() to DSPContext with x86-optimized versions and use itin the ac3_fixed encoder.
ac3enc: do not right-shift fixed-point coefficients in the final MDCT stage.
This increases the accuracy of coefficients, leading to improved quality.Rescaling of the coefficients to full 25-bit accuracy is done rather thanoffsetting the exponent values. This requires coefficient scaling to be done...
ac3enc: fix bug in stereo rematrixing decision.
The rematrixing strategy reuse flags are not reset between frames, so theyneed to be initialized for all blocks, not just block 0.
ac3enc: change default floor code to 7.
This is to match the value in every (E-)AC-3 file from commercial sources.It has a negligible effect on audio quality.
ac3enc: Change EXP_DIFF_THRESHOLD to 500.
This patch changes the exponent difference threshold in the exponentstrategy decision function of the AC-3 encoder. I tested lowering inincrements of 100. From 1000 down to 500 generally increased in qualitywith each step, but 400 was generally much worse....
Add stereo rematrixing support to the AC-3 encoders.This improves the audio quality significantly for stereo source with both thefixed-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.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.This gives slightly better quality in PEAQ tests.Code 3 gives a dBpb value of 2816 = -132dB (128 psd units = -6dB), whichcorresponds to 22 bits. Since the exponents have an offset applied, the16-bit source looks like 24-bit source to the bit allocation routine....
Change FIX15 back to clipping to -32767..32767.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().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.
Originally committed as revision 25107 to svn://svn.ffmpeg.org/ffmpeg/trunk
tiny_psnr: skip wav headers on input files
The byte count printed excludes the header, and offsets are appliedafter the the headers are skipped.
Reference files updated to reflect new output. Some stddev/psnr valueshave changed slightly due to headers no longer being compared....
tiny_psnr: print max absolute difference between files
Regression test reference updates are due to the extra outputfrom 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 agreeswith me that it's unnecessary.
Originally committed as revision 23478 to svn://svn.ffmpeg.org/ffmpeg/trunk
matroskaenc: Mux clusters better
Start them on keyframes when reasonable, and delay writing audio packetsto help ensure that there's audio samples available for the first frame inclusters.
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 mkvenc
Originally committed as revision 23248 to svn://svn.ffmpeg.org/ffmpeg/trunk
Add VorbisComment writing to FLAC files.Patch by James Darnley <james darnley at gmail>.
Originally committed as revision 22605 to svn://svn.ffmpeg.org/ffmpeg/trunk
Simplify starting and ending clusters
Originally committed as revision 22199 to svn://svn.ffmpeg.org/ffmpeg/trunk
Place regression test output files in subdirs per family
Originally committed as revision 22155 to svn://svn.ffmpeg.org/ffmpeg/trunk
Separate audio-only tests so they are only run once
Originally committed as revision 21556 to svn://svn.ffmpeg.org/ffmpeg/trunk