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avformat/matroskaenc: Avoid allocations when writing Dynamic HDR10+ 

Possible since 61b27b15fc.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-08-08 12:59:47 +02:00
parent cf20f18c41
commit 3b75375c9c
1 changed files with 7 additions and 19 deletions
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26
libavformat/matroskaenc.c
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@ -2709,7 +2709,8 @@ static int mkv_write_block(void *logctx, MatroskaMuxContext *mkv,
int keyframe, int64_t ts, uint64_t duration,
int force_blockgroup, int64_t relative_packet_pos)
{
uint8_t *side_data, *buf = NULL;
uint8_t t35_buf[6 + AV_HDR_PLUS_MAX_PAYLOAD_SIZE];
uint8_t *side_data;
size_t side_data_size;
uint64_t additional_id;
unsigned track_number = track->track_num;
@ -2765,17 +2766,8 @@ static int mkv_write_block(void *logctx, MatroskaMuxContext *mkv,
AV_PKT_DATA_DYNAMIC_HDR10_PLUS,
&side_data_size);
if (side_data && side_data_size) {
uint8_t *payload;
size_t payload_size, buf_size;
ret = av_dynamic_hdr_plus_to_t35((AVDynamicHDRPlus *)side_data, NULL,
&payload_size);
if (ret < 0)
return ret;
buf_size = payload_size + 6;
buf = payload = av_malloc(buf_size);
if (!buf)
return AVERROR(ENOMEM);
uint8_t *payload = t35_buf;
size_t payload_size = sizeof(t35_buf) - 6;
bytestream_put_byte(&payload, 0xB5); // country_code
bytestream_put_be16(&payload, 0x3C); // provider_code
@ -2785,9 +2777,9 @@ static int mkv_write_block(void *logctx, MatroskaMuxContext *mkv,
ret = av_dynamic_hdr_plus_to_t35((AVDynamicHDRPlus *)side_data, &payload,
&payload_size);
if (ret < 0)
goto fail;
return ret;
mkv_write_blockadditional(&writer, buf, buf_size,
mkv_write_blockadditional(&writer, t35_buf, payload_size + 6,
MATROSKA_BLOCK_ADD_ID_ITU_T_T35);
track->max_blockaddid = FFMAX(track->max_blockaddid,
MATROSKA_BLOCK_ADD_ID_ITU_T_T35);
@ -2807,11 +2799,7 @@ static int mkv_write_block(void *logctx, MatroskaMuxContext *mkv,
ebml_writer_add_sint(&writer, MATROSKA_ID_BLOCKREFERENCE,
track->last_timestamp - ts);
ret = ebml_writer_write(&writer, pb);
fail:
av_free(buf);
return ret;
return ebml_writer_write(&writer, pb);
}
static int mkv_end_cluster(AVFormatContext *s)