mov: read itunes cover art.

libavformat/mov.c

@@ -166,6 +166,48 @@ static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
     return p - dst;
 }
 
+static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
+{
+    AVPacket pkt;
+    AVStream *st;
+    MOVStreamContext *sc;
+    enum CodecID id;
+    int ret;
+
+    switch (type) {
+    case 0xd:  id = CODEC_ID_MJPEG; break;
+    case 0xe:  id = CODEC_ID_PNG;   break;
+    case 0x1b: id = CODEC_ID_BMP;   break;
+    default:
+        av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
+        avio_skip(pb, len);
+        return 0;
+    }
+
+    st = avformat_new_stream(c->fc, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+    sc = av_mallocz(sizeof(*sc));
+    if (!sc)
+        return AVERROR(ENOMEM);
+    st->priv_data = sc;
+
+    ret = av_get_packet(pb, &pkt, len);
+    if (ret < 0)
+        return ret;
+
+    st->disposition              |= AV_DISPOSITION_ATTACHED_PIC;
+
+    st->attached_pic              = pkt;
+    st->attached_pic.stream_index = st->index;
+    st->attached_pic.flags       |= AV_PKT_FLAG_KEY;
+
+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+    st->codec->codec_id   = id;
+
+    return 0;
+}
+
 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 {
 #ifdef MOV_EXPORT_ALL_METADATA
@@ -224,6 +266,14 @@ static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             avio_rb32(pb); // unknown
             str_size = data_size - 16;
             atom.size -= 16;
+
+            if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
+                int ret = mov_read_covr(c, pb, data_type, str_size);
+                if (ret < 0) {
+                    av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
+                    return ret;
+                }
+            }
         } else return 0;
     } else if (atom.size > 4 && key && !c->itunes_metadata) {
         str_size = avio_rb16(pb); // string length