[FFmpeg-cvslog] swr/auto_matrix: treat stereo downmix like stereo.

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sat Sep  8 21:11:45 2012 +0200| [f8d74cbdc39726965723ff81ccb10a841d5ab8a4] | committer: Michael Niedermayer

swr/auto_matrix: treat stereo downmix like stereo.

Based on code by John Stebbins
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f8d74cbdc39726965723ff81ccb10a841d5ab8a4
---

 libswresample/rematrix.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/libswresample/rematrix.c b/libswresample/rematrix.c
index a8d5fde..c4c218d 100644
--- a/libswresample/rematrix.c
+++ b/libswresample/rematrix.c
@@ -103,6 +103,8 @@ static int even(int64_t layout){
 }
 
 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;
 
     return layout;
 }