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ffmpeg.wasm-core
Commit 61926b6c authored by Muhammad Faiz's avatar Muhammad Faiz
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swresample/resample: use uniform normalization 

this gives better frequency response

update swresample fate and other fates
that depend on resampling
Signed-off-by: 's avatarMuhammad Faiz <mfcc64@gmail.com>
parent dbc932e7
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Showing with 163 additions and 163 deletions
libswresample/resample.c
View file @ 61926b6c
......@@ -149,6 +149,7 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
double *tab = av_malloc_array(tap_count+1, sizeof(*tab));
double *sin_lut = av_malloc_array(ph_nb, sizeof(*sin_lut));
const int center= (tap_count-1)/2;
double norm = 0;
int ret = AVERROR(ENOMEM);
if (!tab || !sin_lut)
......@@ -160,10 +161,9 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
if (factor == 1.0) {
for (ph = 0; ph < ph_nb; ph++)
sin_lut[ph] = sin(M_PI * ph / phase_count);
sin_lut[ph] = sin(M_PI * ph / phase_count) * (center & 1 ? 1 : -1);
}
for(ph = 0; ph < ph_nb; ph++) {
double norm = 0;
s = sin_lut[ph];
for(i=0;i<=tap_count;i++) {
x = M_PI * ((double)(i - center) - (double)ph / phase_count) * factor;
......@@ -194,7 +194,7 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
tab[i] = y;
s = -s;
if (i < tap_count)
if (!ph && i < tap_count)
norm += y;
}
......@@ -211,7 +211,7 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
else {
for (i = 1; i <= tap_count; i++)
((int16_t*)filter)[(phase_count-ph) * alloc + tap_count-i] =
av_clip_int16(lrintf(tab[i] * scale / (norm - tab[0] + tab[tap_count])));
av_clip_int16(lrintf(tab[i] * scale / norm));
}
break;
case AV_SAMPLE_FMT_S32P:
......@@ -225,7 +225,7 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
else {
for (i = 1; i <= tap_count; i++)
((int32_t*)filter)[(phase_count-ph) * alloc + tap_count-i] =
av_clipl_int32(llrint(tab[i] * scale / (norm - tab[0] + tab[tap_count])));
av_clipl_int32(llrint(tab[i] * scale / norm));
}
break;
case AV_SAMPLE_FMT_FLTP:
......@@ -238,7 +238,7 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
}
else {
for (i = 1; i <= tap_count; i++)
((float*)filter)[(phase_count-ph) * alloc + tap_count-i] = tab[i] * scale / (norm - tab[0] + tab[tap_count]);
((float*)filter)[(phase_count-ph) * alloc + tap_count-i] = tab[i] * scale / norm;
}
break;
case AV_SAMPLE_FMT_DBLP:
......@@ -251,7 +251,7 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
}
else {
for (i = 1; i <= tap_count; i++)
((double*)filter)[(phase_count-ph) * alloc + tap_count-i] = tab[i] * scale / (norm - tab[0] + tab[tap_count]);
((double*)filter)[(phase_count-ph) * alloc + tap_count-i] = tab[i] * scale / norm;
}
break;
}
......
tests/fate/libswresample.mak
View file @ 61926b6c
This diff is collapsed.
tests/ref/acodec/roqaudio
View file @ 61926b6c
75859976d7098588aeaebbc5551484a9 *tests/data/fate/acodec-roqaudio.roq
265992 tests/data/fate/acodec-roqaudio.roq
73d5aaaab9488e63f1cf6fc324c7a9a2 *tests/data/fate/acodec-roqaudio.out.wav
2057ed235e9d4e727e13bf57f3891093 *tests/data/fate/acodec-roqaudio.out.wav
stddev: 4481.70 PSNR: 23.30 MAXDIFF:46250 bytes: 1058400/ 1058400
tests/ref/acodec/s302m
View file @ 61926b6c
f6908214498489799b50e332ac42ebf3 *tests/data/fate/acodec-s302m.mpegts
a69563c4c5db97d1b313c2fd7a193dd4 *tests/data/fate/acodec-s302m.mpegts
1589164 tests/data/fate/acodec-s302m.mpegts
f9b6528eee1aea04640ee83400c78689 *tests/data/fate/acodec-s302m.out.wav
stddev: 986.97 PSNR: 36.44 MAXDIFF:18642 bytes: 1058400/ 1056708
2c033ed1d9029ed03e08c1d01dcefd99 *tests/data/fate/acodec-s302m.out.wav
stddev: 986.98 PSNR: 36.44 MAXDIFF:18642 bytes: 1058400/ 1056708
tests/ref/lavf/dv_fmt
View file @ 61926b6c
11be3e5caa2892236b3475c3f7807b76 *./tests/data/lavf/lavf.dv
3bcb02ee889b8b2da19cae79d0f1c27d *./tests/data/lavf/lavf.dv
3600000 ./tests/data/lavf/lavf.dv
./tests/data/lavf/lavf.dv CRC=0x0b2cd3ec
e9949bc767924e1e7d28856029fee024 *./tests/data/lavf/lavf.dv
./tests/data/lavf/lavf.dv CRC=0x5a36cc70
f827583ae54e590d753c37709738fd54 *./tests/data/lavf/lavf.dv
3480000 ./tests/data/lavf/lavf.dv
./tests/data/lavf/lavf.dv CRC=0xfab17c4a
./tests/data/lavf/lavf.dv CRC=0x8f8074be
87d3b20f656235671383a7eaa2f66330 *./tests/data/lavf/lavf.dv
3600000 ./tests/data/lavf/lavf.dv
./tests/data/lavf/lavf.dv CRC=0xf3e6873c
tests/ref/lavf/gxf
View file @ 61926b6c
7993da95d8bfe04832e27892c163e562 *./tests/data/lavf/lavf.gxf
1b384e20293a84b274739c147e2b290a *./tests/data/lavf/lavf.gxf
795876 ./tests/data/lavf/lavf.gxf
./tests/data/lavf/lavf.gxf CRC=0xda7cebbc
9e873074b5c3ef1d80d233a38e7de156 *./tests/data/lavf/lavf.gxf
./tests/data/lavf/lavf.gxf CRC=0x55b3ec1d
411f109b5867e5cb81bc876d3cc5702b *./tests/data/lavf/lavf.gxf
794656 ./tests/data/lavf/lavf.gxf
./tests/data/lavf/lavf.gxf CRC=0x7f0c9089
./tests/data/lavf/lavf.gxf CRC=0x0d7e90ea
0638c4d073ac224608baaba16732b68f *./tests/data/lavf/lavf.gxf
795876 ./tests/data/lavf/lavf.gxf
./tests/data/lavf/lavf.gxf CRC=0x5ade0285
tests/ref/lavf/mxf
View file @ 61926b6c
c61e677b4facc407ca82b1d7c6298484 *./tests/data/lavf/lavf.mxf
2fd59c174dfb213d35e86dea63c0fb13 *./tests/data/lavf/lavf.mxf
525369 ./tests/data/lavf/lavf.mxf
./tests/data/lavf/lavf.mxf CRC=0xdbfff6f1
1ae017b5879992431614b1c7ab3b48c5 *./tests/data/lavf/lavf.mxf
./tests/data/lavf/lavf.mxf CRC=0x9fd3f752
edb3b610c301362d7b4c12f06f8d2782 *./tests/data/lavf/lavf.mxf
560697 ./tests/data/lavf/lavf.mxf
./tests/data/lavf/lavf.mxf CRC=0x11a6178e
27fac91dce279630a04b94b93518a9d8 *./tests/data/lavf/lavf.mxf
./tests/data/lavf/lavf.mxf CRC=0xc51717ef
a6ba421f38ee5ec46e181225c632fee4 *./tests/data/lavf/lavf.mxf
525369 ./tests/data/lavf/lavf.mxf
./tests/data/lavf/lavf.mxf CRC=0xdbfff6f1
./tests/data/lavf/lavf.mxf CRC=0x9fd3f752
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