+ samples = avio_rl64(pb);
+ if (samples > 0)
+ st->duration = samples;
+ } else if (!memcmp(guid, ff_w64_guid_data, 16)) {
+ wav->data_end = avio_tell(pb) + size - 24;
+
+ data_ofs = avio_tell(pb);
+ if (!pb->seekable)
+ break;
+
+ avio_skip(pb, size - 24);
+ } else if (!memcmp(guid, ff_w64_guid_summarylist, 16)) {
+ int64_t start, end, cur;
+ uint32_t count, chunk_size, i;
+
+ start = avio_tell(pb);
+ end = start + size;
+ count = avio_rl32(pb);
+
+ for (i = 0; i < count; i++) {
+ char chunk_key[5], *value;
+
+ if (url_feof(pb) || (cur = avio_tell(pb)) < 0 || cur > end - 8 /* = tag + size */)
+ break;
+
+ chunk_key[4] = 0;
+ avio_read(pb, chunk_key, 4);
+ chunk_size = avio_rl32(pb);
+
+ value = av_mallocz(chunk_size + 1);
+ if (!value)
+ return AVERROR(ENOMEM);
+
+ ret = avio_get_str16le(pb, chunk_size, value, chunk_size);
+ avio_skip(pb, chunk_size - ret);
+
+ av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL);
+ }
+
+ avio_skip(pb, end - avio_tell(pb));
+ } else {
+ av_log(s, AV_LOG_DEBUG, "unknown guid: "FF_PRI_GUID"\n", FF_ARG_GUID(guid));
+ avio_skip(pb, size - 24);
+ }