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avcodec/h2645_parse: add support for LCEVC

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Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer
2026-02-16 11:59:15 -03:00
parent 3dba9eb806
commit 2d8c55b057
1 changed files with 63 additions and 0 deletions
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63
libavcodec/h2645_parse.c
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@@ -149,6 +149,47 @@ nsc:
return si;
}
static const char *const lcevc_nal_type_name[32] = {
"UNSPEC0", // LCEVC_UNSPEC0_NUT
"UNSPEC1", // LCEVC_UNSPEC1_NUT
"UNSPEC2", // LCEVC_UNSPEC2_NUT
"UNSPEC3", // LCEVC_UNSPEC3_NUT
"UNSPEC4", // LCEVC_UNSPEC4_NUT
"UNSPEC5", // LCEVC_UNSPEC5_NUT
"UNSPEC6", // LCEVC_UNSPEC6_NUT
"UNSPEC7", // LCEVC_UNSPEC7_NUT
"UNSPEC8", // LCEVC_UNSPEC8_NUT
"UNSPEC9", // LCEVC_UNSPEC9_NUT
"UNSPEC10", // LCEVC_UNSPEC10_NUT
"UNSPEC11", // LCEVC_UNSPEC11_NUT
"UNSPEC12", // LCEVC_UNSPEC12_NUT
"UNSPEC13", // LCEVC_UNSPEC13_NUT
"UNSPEC14", // LCEVC_UNSPEC14_NUT
"UNSPEC15", // LCEVC_UNSPEC15_NUT
"UNSPEC16", // LCEVC_UNSPEC16_NUT
"UNSPEC17", // LCEVC_UNSPEC17_NUT
"UNSPEC18", // LCEVC_UNSPEC18_NUT
"UNSPEC19", // LCEVC_UNSPEC19_NUT
"UNSPEC20", // LCEVC_UNSPEC20_NUT
"UNSPEC21", // LCEVC_UNSPEC21_NUT
"UNSPEC22", // LCEVC_UNSPEC22_NUT
"UNSPEC23", // LCEVC_UNSPEC23_NUT
"UNSPEC24", // LCEVC_UNSPEC24_NUT
"UNSPEC25", // LCEVC_UNSPEC25_NUT
"UNSPEC26", // LCEVC_UNSPEC26_NUT
"UNSPEC27", // LCEVC_UNSPEC27_NUT
"NON_IDR_NUT", //LCEVC_NON_IDR_NUT
"IDR_NUT", // LCEVC_IDR_NUT
"RSV_NUT", // LCEVC_RSV_NUT
"UNSPEC31", // LCEVC_UNSPEC31_NUT
};
static const char *lcevc_nal_unit_name(int nal_type)
{
av_assert0(nal_type >= 0 && nal_type < 32);
return lcevc_nal_type_name[nal_type];
}
static const char *const vvc_nal_type_name[32] = {
"TRAIL_NUT", // VVC_TRAIL_NUT
"STSA_NUT", // VVC_STSA_NUT
@@ -338,6 +379,26 @@ static int get_bit_length(H2645NAL *nal, int min_size, int skip_trailing_zeros)
* @return AVERROR_INVALIDDATA if the packet is not a valid NAL unit,
* 0 otherwise
*/
static int lcevc_parse_nal_header(H2645NAL *nal, void *logctx)
{
GetBitContext *gb = &nal->gb;
if (get_bits1(gb) != 0) //forbidden_zero_bit
return AVERROR_INVALIDDATA;
if (get_bits1(gb) != 1) //forbidden_one_bit
return AVERROR_INVALIDDATA;
nal->type = get_bits(gb, 5);
av_log(logctx, AV_LOG_DEBUG,
"nal_unit_type: %d(%s)\n",
nal->type, lcevc_nal_unit_name(nal->type));
return 0;
}
static int vvc_parse_nal_header(H2645NAL *nal, void *logctx)
{
GetBitContext *gb = &nal->gb;
@@ -582,6 +643,8 @@ int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length,
if (codec_id == AV_CODEC_ID_VVC)
ret = vvc_parse_nal_header(nal, logctx);
else if (codec_id == AV_CODEC_ID_LCEVC)
ret = lcevc_parse_nal_header(nal, logctx);
else if (codec_id == AV_CODEC_ID_HEVC) {
ret = hevc_parse_nal_header(nal, logctx);
if (nal->nuh_layer_id == 63)