cin audio: validate the channel count

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 5 insertions, 0 deletions

diff --git a/libavcodec/dsicinav.c b/libavcodec/dsicinav.c
index faca821c7d..d4dbb35472 100644
--- a/libavcodec/dsicinav.c
+++ b/libavcodec/dsicinav.c
@@ -310,6 +310,11 @@ static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
     CinAudioContext *cin = avctx->priv_data;
 
     cin->avctx = avctx;
+    if (avctx->channels != 1) {
+        av_log_ask_for_sample(avctx, "Number of channels is not supported\n");
+        return AVERROR_PATCHWELCOME;
+    }
+
     cin->initial_decode_frame = 1;
     cin->delta = 0;
     avctx->sample_fmt = AV_SAMPLE_FMT_S16;