qdm2: convert to new channel layout API

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/qdm2.c

@@ -1687,13 +1687,13 @@ static av_cold int qdm2_decode_init(AVCodecContext *avctx)
 
     bytestream2_skip(&gb, 4);
 
-    avctx->channels = s->nb_channels = s->channels = bytestream2_get_be32(&gb);
+    s->nb_channels = s->channels = bytestream2_get_be32(&gb);
     if (s->channels <= 0 || s->channels > MPA_MAX_CHANNELS) {
         av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
         return AVERROR_INVALIDDATA;
     }
-    avctx->channel_layout = avctx->channels == 2 ? AV_CH_LAYOUT_STEREO :
+    av_channel_layout_uninit(&avctx->ch_layout);
-                                                   AV_CH_LAYOUT_MONO;
+    av_channel_layout_default(&avctx->ch_layout, s->channels);
 
     avctx->sample_rate = bytestream2_get_be32(&gb);
     avctx->bit_rate = bytestream2_get_be32(&gb);