699 lines
16 KiB
Go
699 lines
16 KiB
Go
package h265parser
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import (
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"bytes"
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"errors"
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"fmt"
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"github.com/deepch/vdk/av"
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"github.com/deepch/vdk/utils/bits"
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"github.com/deepch/vdk/utils/bits/pio"
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)
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type SPSInfo struct {
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ProfileIdc uint
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LevelIdc uint
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MbWidth uint
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MbHeight uint
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CropLeft uint
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CropRight uint
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CropTop uint
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CropBottom uint
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Width uint
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Height uint
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numTemporalLayers uint
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temporalIdNested uint
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chromaFormat uint
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PicWidthInLumaSamples uint
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PicHeightInLumaSamples uint
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bitDepthLumaMinus8 uint
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bitDepthChromaMinus8 uint
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generalProfileSpace uint
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generalTierFlag uint
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generalProfileIDC uint
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generalProfileCompatibilityFlags uint32
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generalConstraintIndicatorFlags uint64
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generalLevelIDC uint
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}
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const (
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NAL_UNIT_CODED_SLICE_TRAIL_N = 0
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NAL_UNIT_CODED_SLICE_TRAIL_R = 1
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NAL_UNIT_CODED_SLICE_TSA_N = 2
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NAL_UNIT_CODED_SLICE_TSA_R = 3
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NAL_UNIT_CODED_SLICE_STSA_N = 4
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NAL_UNIT_CODED_SLICE_STSA_R = 5
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NAL_UNIT_CODED_SLICE_RADL_N = 6
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NAL_UNIT_CODED_SLICE_RADL_R = 7
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NAL_UNIT_CODED_SLICE_RASL_N = 8
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NAL_UNIT_CODED_SLICE_RASL_R = 9
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NAL_UNIT_RESERVED_VCL_N10 = 10
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NAL_UNIT_RESERVED_VCL_R11 = 11
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NAL_UNIT_RESERVED_VCL_N12 = 12
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NAL_UNIT_RESERVED_VCL_R13 = 13
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NAL_UNIT_RESERVED_VCL_N14 = 14
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NAL_UNIT_RESERVED_VCL_R15 = 15
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NAL_UNIT_CODED_SLICE_BLA_W_LP = 16
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NAL_UNIT_CODED_SLICE_BLA_W_RADL = 17
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NAL_UNIT_CODED_SLICE_BLA_N_LP = 18
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NAL_UNIT_CODED_SLICE_IDR_W_RADL = 19
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NAL_UNIT_CODED_SLICE_IDR_N_LP = 20
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NAL_UNIT_CODED_SLICE_CRA = 21
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NAL_UNIT_RESERVED_IRAP_VCL22 = 22
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NAL_UNIT_RESERVED_IRAP_VCL23 = 23
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NAL_UNIT_RESERVED_VCL24 = 24
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NAL_UNIT_RESERVED_VCL25 = 25
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NAL_UNIT_RESERVED_VCL26 = 26
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NAL_UNIT_RESERVED_VCL27 = 27
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NAL_UNIT_RESERVED_VCL28 = 28
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NAL_UNIT_RESERVED_VCL29 = 29
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NAL_UNIT_RESERVED_VCL30 = 30
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NAL_UNIT_RESERVED_VCL31 = 31
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NAL_UNIT_VPS = 32
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NAL_UNIT_SPS = 33
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NAL_UNIT_PPS = 34
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NAL_UNIT_ACCESS_UNIT_DELIMITER = 35
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NAL_UNIT_EOS = 36
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NAL_UNIT_EOB = 37
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NAL_UNIT_FILLER_DATA = 38
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NAL_UNIT_PREFIX_SEI = 39
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NAL_UNIT_SUFFIX_SEI = 40
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NAL_UNIT_RESERVED_NVCL41 = 41
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NAL_UNIT_RESERVED_NVCL42 = 42
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NAL_UNIT_RESERVED_NVCL43 = 43
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NAL_UNIT_RESERVED_NVCL44 = 44
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NAL_UNIT_RESERVED_NVCL45 = 45
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NAL_UNIT_RESERVED_NVCL46 = 46
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NAL_UNIT_RESERVED_NVCL47 = 47
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NAL_UNIT_UNSPECIFIED_48 = 48
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NAL_UNIT_UNSPECIFIED_49 = 49
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NAL_UNIT_UNSPECIFIED_50 = 50
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NAL_UNIT_UNSPECIFIED_51 = 51
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NAL_UNIT_UNSPECIFIED_52 = 52
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NAL_UNIT_UNSPECIFIED_53 = 53
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NAL_UNIT_UNSPECIFIED_54 = 54
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NAL_UNIT_UNSPECIFIED_55 = 55
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NAL_UNIT_UNSPECIFIED_56 = 56
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NAL_UNIT_UNSPECIFIED_57 = 57
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NAL_UNIT_UNSPECIFIED_58 = 58
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NAL_UNIT_UNSPECIFIED_59 = 59
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NAL_UNIT_UNSPECIFIED_60 = 60
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NAL_UNIT_UNSPECIFIED_61 = 61
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NAL_UNIT_UNSPECIFIED_62 = 62
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NAL_UNIT_UNSPECIFIED_63 = 63
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NAL_UNIT_INVALID = 64
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)
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const (
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MAX_VPS_COUNT = 16
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MAX_SUB_LAYERS = 7
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MAX_SPS_COUNT = 32
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)
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var (
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ErrorH265IncorectUnitSize = errors.New("Invorect Unit Size")
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ErrorH265IncorectUnitType = errors.New("Incorect Unit Type")
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)
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func IsDataNALU(b []byte) bool {
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typ := b[0] & 0x1f
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return typ >= 1 && typ <= 5
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}
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var StartCodeBytes = []byte{0, 0, 1}
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var AUDBytes = []byte{0, 0, 0, 1, 0x9, 0xf0, 0, 0, 0, 1} // AUD
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func CheckNALUsType(b []byte) (typ int) {
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_, typ = SplitNALUs(b)
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return
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}
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const (
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NALU_RAW = iota
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NALU_AVCC
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NALU_ANNEXB
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)
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func SplitNALUs(b []byte) (nalus [][]byte, typ int) {
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if len(b) < 4 {
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return [][]byte{b}, NALU_RAW
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}
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val3 := pio.U24BE(b)
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val4 := pio.U32BE(b)
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if val4 <= uint32(len(b)) {
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_val4 := val4
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_b := b[4:]
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nalus := [][]byte{}
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for {
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nalus = append(nalus, _b[:_val4])
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_b = _b[_val4:]
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if len(_b) < 4 {
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break
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}
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_val4 = pio.U32BE(_b)
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_b = _b[4:]
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if _val4 > uint32(len(_b)) {
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break
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}
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}
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if len(_b) == 0 {
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return nalus, NALU_AVCC
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}
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}
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if val3 == 1 || val4 == 1 {
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_val3 := val3
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_val4 := val4
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start := 0
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pos := 0
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for {
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if start != pos {
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nalus = append(nalus, b[start:pos])
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}
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if _val3 == 1 {
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pos += 3
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} else if _val4 == 1 {
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pos += 4
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}
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start = pos
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if start == len(b) {
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break
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}
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_val3 = 0
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_val4 = 0
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for pos < len(b) {
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if pos+2 < len(b) && b[pos] == 0 {
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_val3 = pio.U24BE(b[pos:])
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if _val3 == 0 {
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if pos+3 < len(b) {
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_val4 = uint32(b[pos+3])
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if _val4 == 1 {
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break
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}
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}
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} else if _val3 == 1 {
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break
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}
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pos++
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} else {
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pos++
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}
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}
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}
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typ = NALU_ANNEXB
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return
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}
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return [][]byte{b}, NALU_RAW
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}
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func ParseSPS(sps []byte) (ctx SPSInfo, err error) {
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if len(sps) < 2 {
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err = ErrorH265IncorectUnitSize
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return
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}
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rbsp := nal2rbsp(sps[2:])
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br := &bits.GolombBitReader{R: bytes.NewReader(rbsp)}
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if _, err = br.ReadBits(4); err != nil {
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return
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}
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spsMaxSubLayersMinus1, err := br.ReadBits(3)
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if err != nil {
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return
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}
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if spsMaxSubLayersMinus1+1 > ctx.numTemporalLayers {
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ctx.numTemporalLayers = spsMaxSubLayersMinus1 + 1
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}
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if ctx.temporalIdNested, err = br.ReadBit(); err != nil {
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return
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}
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if err = parsePTL(br, &ctx, spsMaxSubLayersMinus1); err != nil {
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return
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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var cf uint
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if cf, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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ctx.chromaFormat = uint(cf)
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if ctx.chromaFormat == 3 {
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if _, err = br.ReadBit(); err != nil {
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return
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}
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}
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if ctx.PicWidthInLumaSamples, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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ctx.Width = uint(ctx.PicWidthInLumaSamples)
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if ctx.PicHeightInLumaSamples, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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ctx.Height = uint(ctx.PicHeightInLumaSamples)
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conformanceWindowFlag, err := br.ReadBit()
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if err != nil {
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return
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}
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if conformanceWindowFlag != 0 {
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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}
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var bdlm8 uint
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if bdlm8, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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ctx.bitDepthChromaMinus8 = uint(bdlm8)
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var bdcm8 uint
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if bdcm8, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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ctx.bitDepthChromaMinus8 = uint(bdcm8)
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_, err = br.ReadExponentialGolombCode()
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if err != nil {
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return
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}
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spsSubLayerOrderingInfoPresentFlag, err := br.ReadBit()
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if err != nil {
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return
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}
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var i uint
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if spsSubLayerOrderingInfoPresentFlag != 0 {
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i = 0
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} else {
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i = spsMaxSubLayersMinus1
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}
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for ; i <= spsMaxSubLayersMinus1; i++ {
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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if _, err = br.ReadExponentialGolombCode(); err != nil {
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return
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}
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return
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}
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func parsePTL(br *bits.GolombBitReader, ctx *SPSInfo, maxSubLayersMinus1 uint) error {
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var err error
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var ptl SPSInfo
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if ptl.generalProfileSpace, err = br.ReadBits(2); err != nil {
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return err
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}
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if ptl.generalTierFlag, err = br.ReadBit(); err != nil {
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return err
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}
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if ptl.generalProfileIDC, err = br.ReadBits(5); err != nil {
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return err
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}
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if ptl.generalProfileCompatibilityFlags, err = br.ReadBits32(32); err != nil {
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return err
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}
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if ptl.generalConstraintIndicatorFlags, err = br.ReadBits64(48); err != nil {
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return err
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}
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if ptl.generalLevelIDC, err = br.ReadBits(8); err != nil {
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return err
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}
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updatePTL(ctx, &ptl)
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if maxSubLayersMinus1 == 0 {
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return nil
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}
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subLayerProfilePresentFlag := make([]uint, maxSubLayersMinus1)
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subLayerLevelPresentFlag := make([]uint, maxSubLayersMinus1)
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for i := uint(0); i < maxSubLayersMinus1; i++ {
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if subLayerProfilePresentFlag[i], err = br.ReadBit(); err != nil {
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return err
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}
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if subLayerLevelPresentFlag[i], err = br.ReadBit(); err != nil {
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return err
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}
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}
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if maxSubLayersMinus1 > 0 {
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for i := maxSubLayersMinus1; i < 8; i++ {
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if _, err = br.ReadBits(2); err != nil {
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return err
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}
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}
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}
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for i := uint(0); i < maxSubLayersMinus1; i++ {
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if subLayerProfilePresentFlag[i] != 0 {
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if _, err = br.ReadBits32(32); err != nil {
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return err
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}
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if _, err = br.ReadBits32(32); err != nil {
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return err
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}
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if _, err = br.ReadBits32(24); err != nil {
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return err
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}
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}
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if subLayerLevelPresentFlag[i] != 0 {
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if _, err = br.ReadBits(8); err != nil {
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return err
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}
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}
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}
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return nil
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}
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func updatePTL(ctx, ptl *SPSInfo) {
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ctx.generalProfileSpace = ptl.generalProfileSpace
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if ptl.generalTierFlag > ctx.generalTierFlag {
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ctx.generalLevelIDC = ptl.generalLevelIDC
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ctx.generalTierFlag = ptl.generalTierFlag
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} else {
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if ptl.generalLevelIDC > ctx.generalLevelIDC {
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ctx.generalLevelIDC = ptl.generalLevelIDC
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}
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}
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if ptl.generalProfileIDC > ctx.generalProfileIDC {
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ctx.generalProfileIDC = ptl.generalProfileIDC
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}
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ctx.generalProfileCompatibilityFlags &= ptl.generalProfileCompatibilityFlags
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ctx.generalConstraintIndicatorFlags &= ptl.generalConstraintIndicatorFlags
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}
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func nal2rbsp(nal []byte) []byte {
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return bytes.Replace(nal, []byte{0x0, 0x0, 0x3}, []byte{0x0, 0x0}, -1)
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}
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type CodecData struct {
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Record []byte
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RecordInfo AVCDecoderConfRecord
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SPSInfo SPSInfo
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}
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func (self CodecData) Type() av.CodecType {
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return av.H265
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}
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func (self CodecData) AVCDecoderConfRecordBytes() []byte {
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return self.Record
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}
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func (self CodecData) SPS() []byte {
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return self.RecordInfo.SPS[0]
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}
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func (self CodecData) PPS() []byte {
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return self.RecordInfo.PPS[0]
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}
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func (self CodecData) VPS() []byte {
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return self.RecordInfo.VPS[0]
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}
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func (self CodecData) Width() int {
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return int(self.SPSInfo.Width)
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}
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func (self CodecData) Height() int {
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return int(self.SPSInfo.Height)
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}
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func NewCodecDataFromAVCDecoderConfRecord(record []byte) (self CodecData, err error) {
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self.Record = record
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if _, err = (&self.RecordInfo).Unmarshal(record); err != nil {
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return
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}
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if len(self.RecordInfo.SPS) == 0 {
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err = fmt.Errorf("h265parser: no SPS found in AVCDecoderConfRecord")
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return
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}
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if len(self.RecordInfo.PPS) == 0 {
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err = fmt.Errorf("h265parser: no PPS found in AVCDecoderConfRecord")
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return
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}
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if len(self.RecordInfo.VPS) == 0 {
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err = fmt.Errorf("h265parser: no VPS found in AVCDecoderConfRecord")
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return
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}
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if self.SPSInfo, err = ParseSPS(self.RecordInfo.SPS[0]); err != nil {
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err = fmt.Errorf("h265parser: parse SPS failed(%s)", err)
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return
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}
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return
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}
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func NewCodecDataFromVPSAndSPSAndPPS(vps, sps, pps []byte) (self CodecData, err error) {
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recordinfo := AVCDecoderConfRecord{}
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recordinfo.AVCProfileIndication = sps[3]
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recordinfo.ProfileCompatibility = sps[4]
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recordinfo.AVCLevelIndication = sps[5]
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recordinfo.SPS = [][]byte{sps}
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recordinfo.PPS = [][]byte{pps}
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recordinfo.VPS = [][]byte{vps}
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recordinfo.LengthSizeMinusOne = 3
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if self.SPSInfo, err = ParseSPS(sps); err != nil {
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return
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}
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buf := make([]byte, recordinfo.Len())
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recordinfo.Marshal(buf, self.SPSInfo)
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self.RecordInfo = recordinfo
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self.Record = buf
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return
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}
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type AVCDecoderConfRecord struct {
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AVCProfileIndication uint8
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ProfileCompatibility uint8
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AVCLevelIndication uint8
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LengthSizeMinusOne uint8
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VPS [][]byte
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SPS [][]byte
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PPS [][]byte
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}
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var ErrDecconfInvalid = fmt.Errorf("h265parser: AVCDecoderConfRecord invalid")
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func (self *AVCDecoderConfRecord) Unmarshal(b []byte) (n int, err error) {
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if len(b) < 7 {
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err = ErrDecconfInvalid
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return
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}
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self.AVCProfileIndication = b[1]
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self.ProfileCompatibility = b[2]
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self.AVCLevelIndication = b[3]
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self.LengthSizeMinusOne = b[4] & 0x03
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spscount := int(b[5] & 0x1f)
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n += 6
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for i := 0; i < spscount; i++ {
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if len(b) < n+2 {
|
|
err = ErrDecconfInvalid
|
|
return
|
|
}
|
|
spslen := int(pio.U16BE(b[n:]))
|
|
n += 2
|
|
|
|
if len(b) < n+spslen {
|
|
err = ErrDecconfInvalid
|
|
return
|
|
}
|
|
self.SPS = append(self.SPS, b[n:n+spslen])
|
|
n += spslen
|
|
}
|
|
|
|
if len(b) < n+1 {
|
|
err = ErrDecconfInvalid
|
|
return
|
|
}
|
|
|
|
ppscount := int(b[n])
|
|
n++
|
|
|
|
for i := 0; i < ppscount; i++ {
|
|
if len(b) < n+2 {
|
|
err = ErrDecconfInvalid
|
|
return
|
|
}
|
|
ppslen := int(pio.U16BE(b[n:]))
|
|
n += 2
|
|
|
|
if len(b) < n+ppslen {
|
|
err = ErrDecconfInvalid
|
|
return
|
|
}
|
|
self.PPS = append(self.PPS, b[n:n+ppslen])
|
|
n += ppslen
|
|
}
|
|
|
|
vpscount := int(b[n])
|
|
n++
|
|
|
|
for i := 0; i < vpscount; i++ {
|
|
if len(b) < n+2 {
|
|
err = ErrDecconfInvalid
|
|
return
|
|
}
|
|
vpslen := int(pio.U16BE(b[n:]))
|
|
n += 2
|
|
|
|
if len(b) < n+vpslen {
|
|
err = ErrDecconfInvalid
|
|
return
|
|
}
|
|
self.VPS = append(self.VPS, b[n:n+vpslen])
|
|
n += vpslen
|
|
}
|
|
return
|
|
}
|
|
|
|
func (self AVCDecoderConfRecord) Len() (n int) {
|
|
n = 23
|
|
for _, sps := range self.SPS {
|
|
n += 5 + len(sps)
|
|
}
|
|
for _, pps := range self.PPS {
|
|
n += 5 + len(pps)
|
|
}
|
|
for _, vps := range self.VPS {
|
|
n += 5 + len(vps)
|
|
}
|
|
return
|
|
}
|
|
|
|
func (self AVCDecoderConfRecord) Marshal(b []byte, si SPSInfo) (n int) {
|
|
b[0] = 1
|
|
b[1] = self.AVCProfileIndication
|
|
b[2] = self.ProfileCompatibility
|
|
b[3] = self.AVCLevelIndication
|
|
b[21] = 3
|
|
b[22] = 3
|
|
n += 23
|
|
b[n] = (self.VPS[0][0] >> 1) & 0x3f
|
|
n++
|
|
b[n] = byte(len(self.VPS) >> 8)
|
|
n++
|
|
b[n] = byte(len(self.VPS))
|
|
n++
|
|
for _, vps := range self.VPS {
|
|
pio.PutU16BE(b[n:], uint16(len(vps)))
|
|
n += 2
|
|
copy(b[n:], vps)
|
|
n += len(vps)
|
|
}
|
|
b[n] = (self.SPS[0][0] >> 1) & 0x3f
|
|
n++
|
|
b[n] = byte(len(self.SPS) >> 8)
|
|
n++
|
|
b[n] = byte(len(self.SPS))
|
|
n++
|
|
for _, sps := range self.SPS {
|
|
pio.PutU16BE(b[n:], uint16(len(sps)))
|
|
n += 2
|
|
copy(b[n:], sps)
|
|
n += len(sps)
|
|
}
|
|
b[n] = (self.PPS[0][0] >> 1) & 0x3f
|
|
n++
|
|
b[n] = byte(len(self.PPS) >> 8)
|
|
n++
|
|
b[n] = byte(len(self.PPS))
|
|
n++
|
|
for _, pps := range self.PPS {
|
|
pio.PutU16BE(b[n:], uint16(len(pps)))
|
|
n += 2
|
|
copy(b[n:], pps)
|
|
n += len(pps)
|
|
}
|
|
return
|
|
}
|
|
|
|
type SliceType uint
|
|
|
|
func (self SliceType) String() string {
|
|
switch self {
|
|
case SLICE_P:
|
|
return "P"
|
|
case SLICE_B:
|
|
return "B"
|
|
case SLICE_I:
|
|
return "I"
|
|
}
|
|
return ""
|
|
}
|
|
|
|
const (
|
|
SLICE_P = iota + 1
|
|
SLICE_B
|
|
SLICE_I
|
|
)
|
|
|
|
func ParseSliceHeaderFromNALU(packet []byte) (sliceType SliceType, err error) {
|
|
if len(packet) <= 1 {
|
|
err = fmt.Errorf("h265parser: packet too short to parse slice header")
|
|
return
|
|
}
|
|
nal_unit_type := packet[0] & 0x1f
|
|
switch nal_unit_type {
|
|
case 1, 2, 5, 19:
|
|
|
|
default:
|
|
err = fmt.Errorf("h265parser: nal_unit_type=%d has no slice header", nal_unit_type)
|
|
return
|
|
}
|
|
|
|
r := &bits.GolombBitReader{R: bytes.NewReader(packet[1:])}
|
|
if _, err = r.ReadExponentialGolombCode(); err != nil {
|
|
return
|
|
}
|
|
var u uint
|
|
if u, err = r.ReadExponentialGolombCode(); err != nil {
|
|
return
|
|
}
|
|
|
|
switch u {
|
|
case 0, 3, 5, 8:
|
|
sliceType = SLICE_P
|
|
case 1, 6:
|
|
sliceType = SLICE_B
|
|
case 2, 4, 7, 9:
|
|
sliceType = SLICE_I
|
|
default:
|
|
err = fmt.Errorf("h265parser: slice_type=%d invalid", u)
|
|
return
|
|
}
|
|
return
|
|
}
|