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demux/packet: add support for ITU T.35 metadata in Matroska

This commit is contained in:
Kacper Michajłow 2024-04-28 19:49:43 +02:00
parent 4f828676fd
commit b68c742b27
2 changed files with 56 additions and 3 deletions
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3
demux/ebml.h
View File

@ -78,6 +78,9 @@ struct ebml_parse_ctx {
#define EBML_UINT_INVALID UINT64_MAX
#define EBML_INT_INVALID INT64_MAX
/* Block Addition Mappings */
#define MATROSKA_BLOCK_ADD_ID_TYPE_ITU_T_T35 4
bool ebml_is_mkv_level1_id(uint32_t id);
uint32_t ebml_read_id (stream_t *s);
uint64_t ebml_read_length (stream_t *s);

50
demux/packet.c
View File

@ -21,11 +21,13 @@
#include <assert.h>
#include <libavcodec/avcodec.h>
#include <libavutil/hdr_dynamic_metadata.h>
#include <libavutil/intreadwrite.h>
#include "common/av_common.h"
#include "common/common.h"
#include "demux.h"
#include "demux/ebml.h"
#include "packet.h"
@ -232,6 +234,54 @@ int demux_packet_add_blockadditional(struct demux_packet *dp, uint64_t id,
{
if (!dp->avpacket)
return -1;
switch (id) {
#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(58, 5, 100)
case MATROSKA_BLOCK_ADD_ID_TYPE_ITU_T_T35: {
static const uint8_t ITU_T_T35_COUNTRY_CODE_US = 0xB5;
static const uint16_t ITU_T_T35_PROVIDER_CODE_SMTPE = 0x3C;
if (size < 6)
break;
uint8_t *p = data;
uint8_t country_code = AV_RB8(p);
p += sizeof(country_code);
uint16_t provider_code = AV_RB16(p);
p += sizeof(provider_code);
if (country_code != ITU_T_T35_COUNTRY_CODE_US ||
provider_code != ITU_T_T35_PROVIDER_CODE_SMTPE)
break;
uint16_t provider_oriented_code = AV_RB16(p);
p += sizeof(provider_oriented_code);
uint8_t application_identifier = AV_RB8(p);
p += sizeof(application_identifier);
if (provider_oriented_code != 1 || application_identifier != 4)
break;
size_t hdrplus_size;
AVDynamicHDRPlus *hdrplus = av_dynamic_hdr_plus_alloc(&hdrplus_size);
MP_HANDLE_OOM(hdrplus);
if (av_dynamic_hdr_plus_from_t35(hdrplus, p, size - (p - (uint8_t *)data)) < 0 ||
av_packet_add_side_data(dp->avpacket, AV_PKT_DATA_DYNAMIC_HDR10_PLUS,
(uint8_t *)hdrplus, hdrplus_size) < 0)
{
av_free(hdrplus);
return -1;
}
return 0;
}
#endif
default:
break;
}
uint8_t *sd = av_packet_new_side_data(dp->avpacket,
AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
8 + size);