[FFmpeg-devel] [PATCH] lswr: channel_map requires input conversion.

[Nicolas George]

channel_map is applied between in and postin.
Without this test, if the input format is an acceptable internal format,
the in->postin conversion is skipped. In the best case,
it ignores channel_map, in the worst case it causes an assert failure
if the number of channels is changed by the map.

Signed-off-by: Nicolas George <nicolas.george at normalesup.org>
---
 libswresample/swresample.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libswresample/swresample.c b/libswresample/swresample.c
index 1b5492d..0c869f9 100644
--- a/libswresample/swresample.c
+++ b/libswresample/swresample.c
@@ -542,7 +542,7 @@ static int swr_convert_internal(struct SwrContext *s, AudioData *out, int out_co
     preout_tmp= s->preout;
     preout= &preout_tmp;
 
-    if(s->int_sample_fmt == s-> in_sample_fmt && s->in.planar)
+    if(s->int_sample_fmt == s-> in_sample_fmt && s->in.planar && !s->channel_map)
         postin= in;
 
     if(s->resample_first ? !s->resample : !s->rematrix)
-- 
1.7.10.4