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resample: check memory allocations in av_resample_init()

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Originally committed as revision 24141 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-07-09 16:05:52 +00:00
parent 603e5c0b71
commit a426016cfc
1 changed files with 8 additions and 0 deletions
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8
libavcodec/resample2.c
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@ -183,12 +183,17 @@ AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_size,
double factor= FFMIN(out_rate * cutoff / in_rate, 1.0);
int phase_count= 1<<phase_shift;
if (!c)
return NULL;
c->phase_shift= phase_shift;
c->phase_mask= phase_count-1;
c->linear= linear;
c->filter_length= FFMAX((int)ceil(filter_size/factor), 1);
c->filter_bank= av_mallocz(c->filter_length*(phase_count+1)*sizeof(FELEM));
if (!c->filter_bank)
goto error;
build_filter(c->filter_bank, factor, c->filter_length, phase_count, 1<<FILTER_SHIFT, WINDOW_TYPE);
memcpy(&c->filter_bank[c->filter_length*phase_count+1], c->filter_bank, (c->filter_length-1)*sizeof(FELEM));
c->filter_bank[c->filter_length*phase_count]= c->filter_bank[c->filter_length - 1];
@ -198,6 +203,9 @@ AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_size,
c->index= -phase_count*((c->filter_length-1)/2);
return c;
error:
av_free(c);
return NULL;
}
void av_resample_close(AVResampleContext *c){