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FFmpeg/libswresample/x86
Muhammad Faiz b8c6e5a661 swresample: add exact_rational option
give high quality resampling
as good as with linear_interp=on
as fast as without linear_interp=on
tested visually with ffplay
ffplay -f lavfi "aevalsrc='sin(10000*t*t)', aresample=osr=48000, showcqt=gamma=5"
ffplay -f lavfi "aevalsrc='sin(10000*t*t)', aresample=osr=48000:linear_interp=on, showcqt=gamma=5"
ffplay -f lavfi "aevalsrc='sin(10000*t*t)', aresample=osr=48000:exact_rational=on, showcqt=gamma=5"

slightly speed improvement
for fair comparison with -cpuflags 0
audio.wav is ~ 1 hour 44100 stereo 16bit wav file
ffmpeg -i audio.wav -af aresample=osr=48000 -f null -
        old         new
real    13.498s     13.121s
user    13.364s     12.987s
sys      0.131s      0.129s

linear_interp=on
        old         new
real    23.035s     23.050s
user    22.907s     22.917s
sys      0.119s     0.125s

exact_rational=on
real    12.418s
user    12.298s
sys      0.114s

possibility to decrease memory usage if soft compensation is ignored

Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
2016-06-13 12:36:01 +07:00
..
audio_convert_init.c x86: use the new helper macros where useful 2016-02-14 20:00:21 -03:00
audio_convert.asm x86/audio_convert: fix clobbering of xmm registers 2015-10-01 22:40:50 -03:00
Makefile
rematrix_init.c x86: check for AV_CPU_FLAG_AVXSLOW where useful 2015-06-01 00:15:35 +02:00
rematrix.asm swresample/x86: add missing colon to labels 2015-07-26 02:51:13 -03:00
resample_init.c swresample: add exact_rational option 2016-06-13 12:36:01 +07:00
resample.asm x86: move XOP emulation code back to x86inc 2015-08-03 17:11:13 -03:00
w64xmmtest.c