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alac : check readsamplesize to ensure get_bits() doesn't 

fail. Patch by Matthieu Castet <castet.matthieu AT free fr>

Originally committed as revision 14905 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Matthieu Castet 2008-08-22 15:09:20 +00:00 committed by Jai Menon
parent ec6cda8c6e
commit 95801b6a07
1 changed files with 5 additions and 1 deletions
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6
libavcodec/alac.c
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@ -411,7 +411,7 @@ static int alac_decode_frame(AVCodecContext *avctx,
int channels;
unsigned int outputsamples;
int hassize;
int readsamplesize;
unsigned int readsamplesize;
int wasted_bytes;
int isnotcompressed;
uint8_t interlacing_shift;
@ -476,6 +476,10 @@ static int alac_decode_frame(AVCodecContext *avctx,
*outputsize = outputsamples * alac->bytespersample;
readsamplesize = alac->setinfo_sample_size - (wasted_bytes * 8) + channels - 1;
if (readsamplesize > MIN_CACHE_BITS) {
av_log(avctx, AV_LOG_ERROR, "readsamplesize too big (%d)\n", readsamplesize);
return -1;
}
if (!isnotcompressed) {
/* so it is compressed */