+int ff_av1_parse_seq_header(AV1SequenceParameters *seq, const uint8_t *buf, int size)
+{
+ int64_t obu_size;
+ int start_pos, type, temporal_id, spatial_id;
+
+ if (size <= 0)
+ return AVERROR_INVALIDDATA;
+
+ while (size > 0) {
+ int len = parse_obu_header(buf, size, &obu_size, &start_pos,
+ &type, &temporal_id, &spatial_id);
+ if (len < 0)
+ return len;
+
+ switch (type) {
+ case AV1_OBU_SEQUENCE_HEADER:
+ if (!obu_size)
+ return AVERROR_INVALIDDATA;
+
+ return parse_sequence_header(seq, buf + start_pos, obu_size);
+ default:
+ break;
+ }
+ size -= len;
+ buf += len;
+ }
+
+ return AVERROR_INVALIDDATA;
+}
+