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Compute AC3 frame CRC for stronger raw AC3 format probing.

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Closes issue64.

Originally committed as revision 12920 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Andreas Öman 2008-04-21 15:20:53 +00:00
parent 66824f990b
commit c675ef7025
1 changed files with 4 additions and 0 deletions
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4
libavformat/raw.c
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@ -22,6 +22,7 @@
#include "avformat.h"
#include "ac3_parser.h"
#include "raw.h"
#include "crc.h"
#ifdef CONFIG_MUXERS
/* simple formats */
@ -429,6 +430,9 @@ static int ac3_probe(AVProbeData *p)
for(frames = 0; buf2 < end; frames++) {
if(ff_ac3_parse_header(buf2, &hdr) < 0)
break;
if(buf2 + hdr.frame_size > end ||
av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))
break;
buf2 += hdr.frame_size;
}
max_frames = FFMAX(max_frames, frames);