dvaudio: convert to new channel layout API

Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/dvaudiodec.c

@@ -36,11 +36,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
     DVAudioContext *s = avctx->priv_data;
     int i;
 
-    if (avctx->channels != 2) {
-        av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
-        return AVERROR(EINVAL);
-    }
-
     if (avctx->codec_tag == 0x0215) {
         s->block_size = 7200;
     } else if (avctx->codec_tag == 0x0216) {
@@ -55,7 +50,8 @@ static av_cold int decode_init(AVCodecContext *avctx)
     s->is_pal = s->block_size == 8640;
     s->is_12bit = avctx->bits_per_coded_sample == 12;
     avctx->sample_fmt = AV_SAMPLE_FMT_S16;
-    avctx->channel_layout = AV_CH_LAYOUT_STEREO;
+    av_channel_layout_uninit(&avctx->ch_layout);
+    avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
 
     for (i = 0; i < FF_ARRAY_ELEMS(s->shuffle); i++) {
         const unsigned a = s->is_pal ? 18 : 15;