diff options
| author | Muhammad Faiz <mfcc64@gmail.com> | 2016-06-12 01:19:20 +0300 |
|---|---|---|
| committer | Muhammad Faiz <mfcc64@gmail.com> | 2016-06-13 08:36:01 +0300 |
| commit | b8c6e5a6618337a82ea9d0bafb471eeecc51b919 (patch) | |
| tree | 2e3f169f004747e59cde3043312446deec719711 /libswresample/resample.h | |
| parent | 5ca44ebd99937b0038c25784570fa80d158b21fb (diff) | |
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>
Diffstat (limited to 'libswresample/resample.h')
| -rw-r--r-- | libswresample/resample.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/libswresample/resample.h b/libswresample/resample.h index ca0cf2b114..53788c484f 100644 --- a/libswresample/resample.h +++ b/libswresample/resample.h @@ -40,8 +40,10 @@ typedef struct ResampleContext { int frac; int src_incr; int compensation_distance; - int phase_shift; - int phase_mask; + /* TODO remove phase_shift and phase_mask */ + attribute_deprecated int phase_shift; + attribute_deprecated int phase_mask; + int phase_count; int linear; enum SwrFilterType filter_type; double kaiser_beta; |