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avformat/vvc: fix parsing sps_subpic_id

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The length of the sps_subpic_id[i] syntax element is sps_subpic_id_len_minus1 + 1 bits.

Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit 2d84ee374528a8a8eed345a8147e146a0112e43a)
This commit is contained in:
James Almer 2024-05-19 10:21:14 -03:00
parent 1a6995c6d6
commit 85d4df3873
1 changed files with 3 additions and 2 deletions
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5
libavformat/vvc.c
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@ -392,6 +392,7 @@ static int vvcc_parse_sps(GetBitContext *gb,
const int tmp_height_val = AV_CEIL_RSHIFT(sps_pic_height_max_in_luma_samples, ctb_log2_size_y);
const int wlen = av_ceil_log2(tmp_width_val);
const int hlen = av_ceil_log2(tmp_height_val);
unsigned int sps_subpic_id_len;
if (sps_num_subpics_minus1 > 0) { // sps_num_subpics_minus1
sps_independent_subpics_flag = get_bits1(gb);
sps_subpic_same_size_flag = get_bits1(gb);
@ -411,11 +412,11 @@ static int vvcc_parse_sps(GetBitContext *gb,
skip_bits(gb, 2); // sps_subpic_treated_as_pic_flag && sps_loop_filter_across_subpic_enabled_flag
}
}
get_ue_golomb_long(gb); // sps_subpic_id_len_minus1
sps_subpic_id_len = get_ue_golomb_long(gb) + 1;
if (get_bits1(gb)) { // sps_subpic_id_mapping_explicitly_signalled_flag
if (get_bits1(gb)) // sps_subpic_id_mapping_present_flag
for (int i = 0; i <= sps_num_subpics_minus1; i++) {
skip_bits1(gb); // sps_subpic_id[i]
skip_bits_long(gb, sps_subpic_id_len); // sps_subpic_id[i]
}
}
}