avformat/av1: split off sequence header parsing from the av1C writing function
It will be used by the dash muxer
Signed-off-by: James Almer <[email protected]>
diff --git a/libavformat/av1.c b/libavformat/av1.c
index bd23891..cc8918e 100644
--- a/libavformat/av1.c
+++ b/libavformat/av1.c
@@ -76,23 +76,6 @@
return ret;
}
-typedef struct AV1SequenceParameters {
- uint8_t seq_profile;
- uint8_t seq_level_idx_0;
- uint8_t seq_tier_0;
- uint8_t high_bitdepth;
- uint8_t twelve_bit;
- uint8_t monochrome;
- uint8_t chroma_subsampling_x;
- uint8_t chroma_subsampling_y;
- uint8_t chroma_sample_position;
- uint8_t color_description_present_flag;
- uint8_t color_primaries;
- uint8_t transfer_characteristics;
- uint8_t matrix_coefficients;
- uint8_t color_range;
-} AV1SequenceParameters;
-
static inline void uvlc(GetBitContext *gb)
{
int leading_zeros = 0;
@@ -301,6 +284,36 @@
return 0;
}
+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;
+}
+
int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size)
{
AVIOContext *seq_pb = NULL, *meta_pb = NULL;
