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swr/auto_matrix: treat a single channel as mono instead of failing 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-09-08 21:18:47 +02:00
parent f8d74cbdc3
commit 0e78e575ed
1 changed files with 7 additions and 0 deletions
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7
libswresample/rematrix.c
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@ -106,6 +106,13 @@ static int clean_layout(SwrContext *s, int64_t layout){
if((layout & AV_CH_LAYOUT_STEREO_DOWNMIX) == AV_CH_LAYOUT_STEREO_DOWNMIX)
return AV_CH_LAYOUT_STEREO;
if(layout && layout != AV_CH_FRONT_CENTER && !(layout&(layout-1))) {
char buf[128];
av_get_channel_layout_string(buf, sizeof(buf), -1, layout);
av_log(s, AV_LOG_VERBOSE, "Treating %s as mono\n", buf);
return AV_CH_FRONT_CENTER;
}
return layout;
}