ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinha...@outlook.com> | 
Sun Sep 18 21:38:08 2022 +0200| [90edbd3185e6fac04aed739e2bdef9c69d574b17] | 
committer: Andreas Rheinhardt

avcodec/avcodec: Always use old channel count/layout if set

This ensures that if AVCodecContext.channels or
AVCodecContext.channel_layout are set, AVCodecContext.ch_layout
has the equivalent values after this block.

(In case these values are set inconsistently, the consistency check
for ch_layout below will error out.)

Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=90edbd3185e6fac04aed739e2bdef9c69d574b17
---

 libavcodec/avcodec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/avcodec.c b/libavcodec/avcodec.c
index 737c4bcd04..a85d3c2309 100644
--- a/libavcodec/avcodec.c
+++ b/libavcodec/avcodec.c
@@ -232,7 +232,7 @@ FF_DISABLE_DEPRECATION_WARNINGS
     if (avctx->channel_layout && !avctx->channels)
         avctx->channels = av_popcount64(avctx->channel_layout);
 
-    if ((avctx->channels > 0 && avctx->ch_layout.nb_channels != 
avctx->channels) ||
+    if ((avctx->channels && avctx->ch_layout.nb_channels != avctx->channels) ||
         (avctx->channel_layout && (avctx->ch_layout.order != 
AV_CHANNEL_ORDER_NATIVE ||
                                    avctx->ch_layout.u.mask != 
avctx->channel_layout))) {
         av_channel_layout_uninit(&avctx->ch_layout);
@@ -240,8 +240,8 @@ FF_DISABLE_DEPRECATION_WARNINGS
             av_channel_layout_from_mask(&avctx->ch_layout, 
avctx->channel_layout);
         } else {
             avctx->ch_layout.order       = AV_CHANNEL_ORDER_UNSPEC;
-            avctx->ch_layout.nb_channels = avctx->channels;
         }
+        avctx->ch_layout.nb_channels = avctx->channels;
     }
 FF_ENABLE_DEPRECATION_WARNINGS
 #endif

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