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swresample/resample: Fix division by 0 with tap_count=1 

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-05-16 05:10:21 +02:00
parent 2f76157eb0
commit feeb3a9261
1 changed files with 4 additions and 4 deletions
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8
libswresample/resample.c
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@ -203,7 +203,7 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
case AV_SAMPLE_FMT_S16P:
for(i=0;i<tap_count;i++)
((int16_t*)filter)[ph * alloc + i] = av_clip_int16(lrintf(tab[i] * scale / norm));
if (tap_count % 2 == 0) {
if (tap_count % 2 == 0 || tap_count == 1) {
for (i = 0; i < tap_count; i++)
((int16_t*)filter)[(phase_count-ph) * alloc + tap_count-1-i] = ((int16_t*)filter)[ph * alloc + i];
}
@ -216,7 +216,7 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
case AV_SAMPLE_FMT_S32P:
for(i=0;i<tap_count;i++)
((int32_t*)filter)[ph * alloc + i] = av_clipl_int32(llrint(tab[i] * scale / norm));
if (tap_count % 2 == 0) {
if (tap_count % 2 == 0 || tap_count == 1) {
for (i = 0; i < tap_count; i++)
((int32_t*)filter)[(phase_count-ph) * alloc + tap_count-1-i] = ((int32_t*)filter)[ph * alloc + i];
}
@ -229,7 +229,7 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
case AV_SAMPLE_FMT_FLTP:
for(i=0;i<tap_count;i++)
((float*)filter)[ph * alloc + i] = tab[i] * scale / norm;
if (tap_count % 2 == 0) {
if (tap_count % 2 == 0 || tap_count == 1) {
for (i = 0; i < tap_count; i++)
((float*)filter)[(phase_count-ph) * alloc + tap_count-1-i] = ((float*)filter)[ph * alloc + i];
}
@ -241,7 +241,7 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
case AV_SAMPLE_FMT_DBLP:
for(i=0;i<tap_count;i++)
((double*)filter)[ph * alloc + i] = tab[i] * scale / norm;
if (tap_count % 2 == 0) {
if (tap_count % 2 == 0 || tap_count == 1) {
for (i = 0; i < tap_count; i++)
((double*)filter)[(phase_count-ph) * alloc + tap_count-1-i] = ((double*)filter)[ph * alloc + i];
}