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dont just resample half of the data sometimes 

Originally committed as revision 3535 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-09-28 21:11:09 +00:00
parent 63dd1377b3
commit 80e8528865
1 changed files with 14 additions and 9 deletions
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23
libavcodec/resample2.c
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@ -160,15 +160,13 @@ int av_resample(AVResampleContext *c, short *dst, short *src, int *consumed, int
int frac= c->frac;
int dst_incr_frac= c->dst_incr % c->src_incr;
int dst_incr= c->dst_incr / c->src_incr;
if(c->compensation_distance && c->compensation_distance < dst_size)
dst_size= c->compensation_distance;
int compensation_distance= c->compensation_distance;
for(dst_index=0; dst_index < dst_size; dst_index++){
short *filter= c->filter_bank + c->filter_length*(index & PHASE_MASK);
int sample_index= index >> PHASE_SHIFT;
int val=0;
if(sample_index < 0){
for(i=0; i<c->filter_length; i++)
val += src[ABS(sample_index + i) % src_size] * filter[i];
@ -199,18 +197,25 @@ int av_resample(AVResampleContext *c, short *dst, short *src, int *consumed, int
frac -= c->src_incr;
index++;
}
if(dst_index + 1 == compensation_distance){
compensation_distance= 0;
dst_incr_frac= c->ideal_dst_incr % c->src_incr;
dst_incr= c->ideal_dst_incr / c->src_incr;
}
}
*consumed= FFMAX(index, 0) >> PHASE_SHIFT;
index= FFMIN(index, 0);
if(compensation_distance){
compensation_distance -= dst_index;
assert(compensation_distance > 0);
}
if(update_ctx){
if(c->compensation_distance){
c->compensation_distance -= dst_index;
if(!c->compensation_distance)
c->dst_incr= c->ideal_dst_incr;
}
c->frac= frac;
c->index= index;
c->dst_incr= dst_incr_frac + c->src_incr*dst_incr;
c->compensation_distance= compensation_distance;
}
#if 0
if(update_ctx && !c->compensation_distance){