@@ -117,6 +117,11 @@ static av_cold int dpcm_decode_init(AVCodecContext *avctx)

     int i;

     short square;

+    if (avctx->channels < 1 || avctx->channels > 2) {

+        av_log(avctx, AV_LOG_INFO, "invalid number of channels\n");

+        return AVERROR(EINVAL);

+    }

+

     s->channels = avctx->channels;

     s->sample[0] = s->sample[1] = 0;