h264parser

Documentation

Index

• Constants
• Variables
• func AnnexBToAVCC(b []byte) ([]byte, error)
• func CheckNALUsType(b []byte) (typ int)
• func DecodeAVCC(b []byte) ([][]byte, error)
• func DecodeAnnexB(b []byte) ([][]byte, error)
• func EncodeAVCC(nalus [][]byte) []byte
• func IsDataNALU(b []byte) bool
• func PktToCodecData(pkt av.Packet) (h264CodecData av.CodecData, err error)
• func SplitNALUs(b []byte) ([][]byte, int)
• type AVCDecoderConfRecord
  • func (self AVCDecoderConfRecord) Len() (n int)
  • func (self AVCDecoderConfRecord) Marshal(b []byte) (n int)
  • func (self *AVCDecoderConfRecord) Unmarshal(b []byte) (n int, err error)
• type CodecData
  • func NewCodecDataFromAVCDecoderConfRecord(record []byte) (self CodecData, err error)
  • func NewCodecDataFromSPSAndPPS(sps, pps []byte) (self CodecData, err error)
  • func (self CodecData) AVCDecoderConfRecordBytes() []byte
  • func (self CodecData) Framerate() (int, int)
  • func (self CodecData) Height() int
  • func (self CodecData) PPS() []byte
  • func (self CodecData) PacketDuration([]byte) (dur time.Duration, err error)
  • func (self CodecData) SPS() []byte
  • func (self CodecData) Type() av.CodecType
  • func (self CodecData) Width() int
• type SPSInfo
  • func ParseSPS(data []byte) (self SPSInfo, err error)
• type SliceType
  • func ParseSliceHeaderFromNALU(packet []byte) (sliceType SliceType, err error)
  • func (self SliceType) String() string

Constants

const (
	NALU_SEI = 6
	NALU_PPS = 7
	NALU_SPS = 8
	NALU_AUD = 9
)

const (
	NALU_RAW = iota
	NALU_AVCC
	NALU_ANNEXB
)

const (
	SLICE_P = iota + 1
	SLICE_B
	SLICE_I
)

Variables

var AUDBytes = []byte{0, 0, 0, 1, 0x9, 0xf0, 0, 0, 0, 1} // AUD

var ErrDecconfInvalid = fmt.Errorf("h264parser: AVCDecoderConfRecord invalid")

var ErrInvalidAVCC = fmt.Errorf("bytestream b was not AVCC")

var ErrInvalidAnnexB = fmt.Errorf("bytestream b was not AnnexB")

var StartCodeBytes = []byte{0, 0, 1}

Functions

func AnnexBToAVCC

func AnnexBToAVCC(b []byte) ([]byte, error)

func CheckNALUsType

func CheckNALUsType(b []byte) (typ int)

func DecodeAVCC

func DecodeAVCC(b []byte) ([][]byte, error)

func DecodeAnnexB

func DecodeAnnexB(b []byte) ([][]byte, error)

func EncodeAVCC

func EncodeAVCC(nalus [][]byte) []byte

func IsDataNALU

func IsDataNALU(b []byte) bool

func PktToCodecData

func PktToCodecData(pkt av.Packet) (h264CodecData av.CodecData, err error)

PktToCodecData parses NAL units to find SPS and PPS, and derive codec data from them. h264CodecData can be nil if the SPS and/or PPS is not found

func SplitNALUs

func SplitNALUs(b []byte) ([][]byte, int)

Types

type AVCDecoderConfRecord

type AVCDecoderConfRecord struct {
	AVCProfileIndication uint8
	ProfileCompatibility uint8
	AVCLevelIndication   uint8
	LengthSizeMinusOne   uint8
	SPS                  [][]byte
	PPS                  [][]byte
}

func (AVCDecoderConfRecord) Len

func (self AVCDecoderConfRecord) Len() (n int)

func (AVCDecoderConfRecord) Marshal

func (self AVCDecoderConfRecord) Marshal(b []byte) (n int)

func (*AVCDecoderConfRecord) Unmarshal

func (self *AVCDecoderConfRecord) Unmarshal(b []byte) (n int, err error)

type CodecData

type CodecData struct {
	Record     []byte
	RecordInfo AVCDecoderConfRecord
	SPSInfo    SPSInfo
}

func NewCodecDataFromAVCDecoderConfRecord

func NewCodecDataFromAVCDecoderConfRecord(record []byte) (self CodecData, err error)

func NewCodecDataFromSPSAndPPS

func NewCodecDataFromSPSAndPPS(sps, pps []byte) (self CodecData, err error)

func (CodecData) AVCDecoderConfRecordBytes

func (self CodecData) AVCDecoderConfRecordBytes() []byte

func (CodecData) Framerate

func (self CodecData) Framerate() (int, int)

func (CodecData) Height

func (self CodecData) Height() int

func (CodecData) PPS

func (self CodecData) PPS() []byte

func (CodecData) PacketDuration

func (self CodecData) PacketDuration([]byte) (dur time.Duration, err error)

func (CodecData) SPS

func (self CodecData) SPS() []byte

func (CodecData) Type

func (self CodecData) Type() av.CodecType

func (CodecData) Width

func (self CodecData) Width() int

type SPSInfo

type SPSInfo struct {
	ProfileIdc uint
	LevelIdc   uint

	MbWidth  uint
	MbHeight uint

	CropLeft   uint
	CropRight  uint
	CropTop    uint
	CropBottom uint

	Width  uint
	Height uint

	FpsNum uint
	FpsDen uint
}

func ParseSPS

func ParseSPS(data []byte) (self SPSInfo, err error)

type SliceType

type SliceType uint

func ParseSliceHeaderFromNALU

func ParseSliceHeaderFromNALU(packet []byte) (sliceType SliceType, err error)

func (SliceType) String

func (self SliceType) String() string