Documentation
¶
Index ¶
Constants ¶
View Source
const ( // VCL NAL unit types NALU_TRAIL = NaluType(0) // Coded slice of a trailing picture or subpicture NALU_STSA = NaluType(1) // Coded slice of an STSA picture or subpicture NALU_RADL = NaluType(2) // Coded slice of a RADL picture or subpicture NALU_RASL = NaluType(3) // Coded slice of a RASL picture or subpicture NALU_RSV_VCL_4 = NaluType(4) // Reserved non-IRAP VCL NAL unit type NALU_RSV_VCL_5 = NaluType(5) // Reserved non-IRAP VCL NAL unit type NALU_RSV_VCL_6 = NaluType(6) // Reserved non-IRAP VCL NAL unit type NALU_IDR_W_RADL = NaluType(7) // Coded slice of an IDR picture or subpicture NALU_IDR_N_LP = NaluType(8) // Coded slice of an IDR picture or subpicture NALU_CRA = NaluType(9) // Coded slice of a CRA picture or subpicture NALU_GDR = NaluType(10) // Coded slice of a GDR picture or subpicture NALU_RSV_IRAP = NaluType(11) // Reserved IRAP VCL NAL unit type // Non-VCL NAL unit types NALU_OPI = NaluType(12) // Operating point information NALU_DCI = NaluType(13) // Decoding capability information NALU_VPS = NaluType(14) // Video parameter set NALU_SPS = NaluType(15) // Sequence parameter set NALU_PPS = NaluType(16) // Picture parameter set NALU_PREFIX_APS = NaluType(17) // Adaptation parameter set NALU_SUFFIX_APS = NaluType(18) // Adaptation parameter set NALU_PH = NaluType(19) // Picture header NALU_AUD = NaluType(20) // AU delimiter NALU_EOS = NaluType(21) // End of sequence NALU_EOB = NaluType(22) // End of bitstream NALU_SEI_PREFIX = NaluType(23) // Supplemental enhancement information NALU_SEI_SUFFIX = NaluType(24) // Supplemental enhancement information NALU_FD = NaluType(25) // Filler data NALU_RSV_NVCL_26 = NaluType(26) // Reserved non-VCL NAL unit type NALU_RSV_NVCL_27 = NaluType(27) // Reserved non-VCL NAL unit type NALU_UNSPEC_28 = NaluType(28) // Unspecified non-VCL NAL unit type NALU_UNSPEC_29 = NaluType(29) // Unspecified non-VCL NAL unit type NALU_UNSPEC_30 = NaluType(30) // Unspecified non-VCL NAL unit type NALU_UNSPEC_31 = NaluType(31) // Unspecified non-VCL NAL unit type )
VVC NAL unit types (0-31)
Variables ¶
This section is empty.
Functions ¶
func NaluTypeName ¶
NaluTypeName returns the name of the NAL unit type (backward compatibility)
Types ¶
type DecConfRec ¶
type DecConfRec struct {
LengthSizeMinusOne uint8
PtlPresentFlag bool
OlsIdx uint16
NumSublayers uint8
ConstantFrameRate uint8
ChromaFormatIDC uint8
BitDepthMinus8 uint8
NativePTL PTL
MaxPictureWidth uint16
MaxPictureHeight uint16
AvgFrameRate uint16
NaluArrays []NaluArray
}
DecConfRec represents VVC decoder configuration record, 11.2.4.2.2
aligned(8) class VvcDecoderConfigurationRecord {
bit(5) reserved = '11111'b;
unsigned int(2) LengthSizeMinusOne;
unsigned int(1) ptl_present_flag;
if (ptl_present_flag) {
unsigned int(9) ols_idx;
unsigned int(3) num_sublayers;
unsigned int(2) constant_frame_rate;
unsigned int(2) chroma_format_idc;
unsigned int(3) bit_depth_minus8;
bit(5) reserved = '11111'b;
VvcPTLRecord(num_sublayers) native_ptl;
unsigned_int(16) max_picture_width;
unsigned_int(16) max_picture_height;
unsigned int(16) avg_frame_rate;
}
unsigned int(8) num_of_arrays;
for (j=0; j < num_of_arrays; j++) {
unsigned int(1) array_completeness;
bit(2) reserved = 0;
unsigned int(5) NAL_unit_type;
if (NAL_unit_type != DCI_NUT && NAL_unit_type != OPI_NUT)
unsigned int(16) num_nalus;
for (i=0; i< num_nalus; i++) {
unsigned int(16) nal_unit_length;
bit(8*nal_unit_length) nal_unit;
}
}
}
func DecodeVVCDecConfRec ¶
func DecodeVVCDecConfRec(data []byte) (DecConfRec, error)
DecodeVVCDecConfRec decodes a VVC decoder configuration record
func (*DecConfRec) Encode ¶
func (d *DecConfRec) Encode(w io.Writer) error
Encode writes the decoder configuration record to w
func (*DecConfRec) EncodeSW ¶
func (d *DecConfRec) EncodeSW(sw bits.SliceWriter) error
EncodeSW writes the decoder configuration record to sw
func (*DecConfRec) Size ¶
func (d *DecConfRec) Size() int
Size returns the size of the decoder configuration record
type NaluArray ¶
NaluArray represents an array of NAL units of the same type
func NewNaluArray ¶
NewNaluArray creates a new NaluArray
func (NaluArray) NaluTypeName ¶
NaluTypeName returns the NAL unit type name
type NaluHeader ¶
type NaluHeader struct {
NuhLayerId uint8 // NAL unit header layer ID
NaluType NaluType
NuhTemporalIdPlus1 uint8 // NAL unit header temporal ID plus 1
}
NaluHeader is VVC NAL unit header
func ParseNaluHeader ¶
func ParseNaluHeader(rawBytes []byte) (NaluHeader, error)
ParseNaluHeader parses the NAL unit header from raw bytes
type NaluType ¶
type NaluType uint8
NaluType - VVC NAL unit type according to ISO/IEC 23090-3 Table 5
type PTL ¶
type PTL struct {
NumBytesConstraintInfo uint8
GeneralProfileIDC uint8
GeneralTierFlag bool
GeneralLevelIDC uint8
PtlFrameOnlyConstraintFlag bool
PtlMultiLayerEnabledFlag bool
GeneralConstraintInfo []byte
PtlSublayerLevelPresentFlag []bool
SublayerLevelIDC []uint8
PtlNumSubProfiles uint8
GeneralSubProfileIDC []uint32
}
PTL represents profile-tier-level information (VvcPTLRecord) Section 11.2.4.1.2
aligned(8) class VvcPTLRecord(num_sublayers) {
bit(2) reserved = 0;
unsigned int(6) num_bytes_constraint_info;
unsigned int(7) general_profile_idc;
unsigned int(1) general_tier_flag;
unsigned int(8) general_level_idc;
unsigned int(1) ptl_frame_only_constraint_flag;
unsigned int(1) ptl_multi_layer_enabled_flag;
unsigned int(8*num_bytes_constraint_info - 2) general_constraint_info;
for (i=num_sublayers - 2; i >= 0; i--)
unsigned int(1) ptl_sublayer_level_present_flag[i];
for (j=num_sublayers; j<=8 && num_sublayers > 1; j++)
bit(1) ptl_reserved_zero_bit = 0;
for (i=num_sublayers-2; i >= 0; i--)
if (ptl_sublayer_level_present_flag[i])
unsigned int(8) sublayer_level_idc[i];
unsigned int(8) ptl_num_sub_profiles;
for (j=0; j < ptl_num_sub_profiles; j++)
unsigned int(32) general_sub_profile_idc[j];
}
Source Files
Click to show internal directories.
Click to hide internal directories.