static int decode_frame_packing_arrangement(H264Context *h)
{
- int cancel;
- int quincunx = 0;
- int content = -1;
- int type = -1;
-
get_ue_golomb(&h->gb); // frame_packing_arrangement_id
- cancel = get_bits1(&h->gb); // frame_packing_arrangement_cancel_flag
- if (cancel == 0) {
- type = get_bits(&h->gb, 7); // frame_packing_arrangement_type
- quincunx = get_bits1(&h->gb); // quincunx_sampling_flag
- content = get_bits(&h->gb, 6); // content_interpretation_type
+ h->sei_frame_packing_present = !get_bits1(&h->gb);
+
+ if (h->sei_frame_packing_present) {
+ h->frame_packing_arrangement_type = get_bits(&h->gb, 7);
+ h->quincunx_subsampling = get_bits1(&h->gb);
+ h->content_interpretation_type = get_bits(&h->gb, 6);
// the following skips: spatial_flipping_flag, frame0_flipped_flag,
// field_views_flag, current_frame_is_frame0_flag,
// frame0_self_contained_flag, frame1_self_contained_flag
skip_bits(&h->gb, 6);
- if (quincunx == 0 && type != 5)
+ if (!h->quincunx_subsampling && h->frame_packing_arrangement_type != 5)
skip_bits(&h->gb, 16); // frame[01]_grid_position_[xy]
skip_bits(&h->gb, 8); // frame_packing_arrangement_reserved_byte
get_ue_golomb(&h->gb); // frame_packing_arrangement_repetition_period
}
skip_bits1(&h->gb); // frame_packing_arrangement_extension_flag
- h->sei_frame_packing_present = (cancel == 0);
- h->frame_packing_arrangement_type = type;
- h->content_interpretation_type = content;
- h->quincunx_subsampling = quincunx;
-
return 0;
}