mvdec: convert to new channel layout API

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

libavformat/mvdec.c

@@ -111,9 +111,7 @@ static int set_channels(AVFormatContext *avctx, AVStream *st, int channels)
         av_log(avctx, AV_LOG_ERROR, "Channel count %d invalid.\n", channels);
         return AVERROR_INVALIDDATA;
     }
-    st->codecpar->channels       = channels;
-    st->codecpar->channel_layout = (st->codecpar->channels == 1) ? AV_CH_LAYOUT_MONO
-                                                                 : AV_CH_LAYOUT_STEREO;
+    av_channel_layout_default(&st->codecpar->ch_layout, channels);
     return 0;
 }
 
@@ -283,7 +281,7 @@ static void read_index(AVIOContext *pb, AVStream *st)
             return ;
         av_add_index_entry(st, pos, timestamp, size, 0, AVINDEX_KEYFRAME);
         if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
-            timestamp += size / (st->codecpar->channels * 2LL);
+            timestamp += size / (st->codecpar->ch_layout.nb_channels * 2LL);
         } else {
             timestamp++;
         }
@@ -402,7 +400,7 @@ static int mv_read_header(AVFormatContext *avctx)
             avio_skip(pb, 8);
             if (ast) {
                 av_add_index_entry(ast, pos, timestamp, asize, 0, AVINDEX_KEYFRAME);
-                timestamp += asize / (ast->codecpar->channels * (uint64_t)bytes_per_sample);
+                timestamp += asize / (ast->codecpar->ch_layout.nb_channels * (uint64_t)bytes_per_sample);
             }
             av_add_index_entry(vst, pos + asize, i, vsize, 0, AVINDEX_KEYFRAME);
         }
@@ -439,7 +437,7 @@ static int mv_read_header(AVFormatContext *avctx)
                                       ast->codecpar->bits_per_coded_sample);
                 ast->codecpar->codec_id = AV_CODEC_ID_NONE;
             }
-            if (ast->codecpar->channels <= 0) {
+            if (ast->codecpar->ch_layout.nb_channels <= 0) {
                 av_log(avctx, AV_LOG_ERROR, "No valid channel count found.\n");
                 return AVERROR_INVALIDDATA;
             }