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add crc check to ac3 decoder

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Originally committed as revision 11379 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2008-01-03 02:26:29 +00:00
parent f7f8b4d296
commit d6939960d5
1 changed files with 10 additions and 3 deletions
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13
libavcodec/ac3dec.c
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@ -35,6 +35,7 @@
#include "avcodec.h"
#include "ac3_parser.h"
#include "bitstream.h"
#include "crc.h"
#include "dsputil.h"
#include "random.h"
@ -1101,15 +1102,21 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
return -1;
}
avctx->sample_rate = s->sample_rate;
avctx->bit_rate = s->bit_rate;
/* check that reported frame size fits in input buffer */
if(s->frame_size > buf_size) {
av_log(avctx, AV_LOG_ERROR, "incomplete frame\n");
return -1;
}
/* check for crc mismatch */
if(av_crc(av_crc8005, 0, &buf[2], s->frame_size-2)) {
av_log(avctx, AV_LOG_ERROR, "frame CRC mismatch\n");
return -1;
}
avctx->sample_rate = s->sample_rate;
avctx->bit_rate = s->bit_rate;
/* channel config */
s->out_channels = s->channels;
if (avctx->request_channels > 0 && avctx->request_channels <= 2 &&