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avcodec/hevc_sei: use ff_parse_a53_cc() to parse A53 Closed Captions 

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2020-08-09 17:53:38 -03:00
parent c93ba51ef3
commit 1ab3ae6fd5
2 changed files with 7 additions and 40 deletions
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2
configure vendored
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@ -2743,7 +2743,7 @@ h264_decoder_suggest="error_resilience"
hap_decoder_select="snappy texturedsp"
hap_encoder_deps="libsnappy"
hap_encoder_select="texturedspenc"
hevc_decoder_select="bswapdsp cabac golomb hevcparse videodsp"
hevc_decoder_select="atsc_a53 bswapdsp cabac golomb hevcparse videodsp"
huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llvidencdsp"
hymt_decoder_select="huffyuv_decoder"

45
libavcodec/hevc_sei.c
View File

@ -22,6 +22,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "atsc_a53.h"
#include "golomb.h"
#include "hevc_ps.h"
#include "hevc_sei.h"
@ -164,51 +165,17 @@ static int decode_nal_sei_pic_timing(HEVCSEI *s, GetBitContext *gb, const HEVCPa
static int decode_registered_user_data_closed_caption(HEVCSEIA53Caption *s, GetBitContext *gb,
int size)
{
int flag;
int user_data_type_code;
int cc_count;
int ret;
if (size < 3)
return AVERROR(EINVAL);
user_data_type_code = get_bits(gb, 8);
if (user_data_type_code == 0x3) {
skip_bits(gb, 1); // reserved
ret = ff_parse_a53_cc(&s->buf_ref, gb->buffer + get_bits_count(gb) / 8, size);
flag = get_bits(gb, 1); // process_cc_data_flag
if (flag) {
skip_bits(gb, 1);
cc_count = get_bits(gb, 5);
skip_bits(gb, 8); // reserved
size -= 2;
if (ret < 0)
return ret;
if (cc_count && size >= cc_count * 3) {
int old_size = s->buf_ref ? s->buf_ref->size : 0;
const uint64_t new_size = (old_size + cc_count
* UINT64_C(3));
int i, ret;
if (new_size > INT_MAX)
return AVERROR(EINVAL);
/* Allow merging of the cc data from two fields. */
ret = av_buffer_realloc(&s->buf_ref, new_size);
if (ret < 0)
return ret;
for (i = 0; i < cc_count; i++) {
s->buf_ref->data[old_size++] = get_bits(gb, 8);
s->buf_ref->data[old_size++] = get_bits(gb, 8);
s->buf_ref->data[old_size++] = get_bits(gb, 8);
}
skip_bits(gb, 8); // marker_bits
}
}
} else {
int i;
for (i = 0; i < size - 1; i++)
skip_bits(gb, 8);
}
skip_bits_long(gb, size * 8);
return 0;
}