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add check for invalid channel mode when coupling is used

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Originally committed as revision 13381 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2008-05-25 15:23:03 +00:00
parent e188cb70d8
commit 3af9131398
1 changed files with 5 additions and 0 deletions
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5
libavcodec/ac3dec.c
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@ -818,6 +818,11 @@ static int ac3_parse_audio_block(AC3DecodeContext *s, int blk)
/* coupling in use */
int cpl_begin_freq, cpl_end_freq;
if (channel_mode < AC3_CHMODE_STEREO) {
av_log(s->avctx, AV_LOG_ERROR, "coupling not allowed in mono or dual-mono\n");
return -1;
}
/* determine which channels are coupled */
for (ch = 1; ch <= fbw_channels; ch++)
s->channel_in_cpl[ch] = get_bits1(gbc);