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av.go
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av.go
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package av
import (
"fmt"
"io"
)
const (
TAG_AUDIO = 8
TAG_VIDEO = 9
TAG_SCRIPTDATAAMF0 = 18
TAG_SCRIPTDATAAMF3 = 0xf
)
const (
MetadatAMF0 = 0x12
MetadataAMF3 = 0xf
)
const (
SOUND_MP3 = 2
SOUND_NELLYMOSER_16KHZ_MONO = 4
SOUND_NELLYMOSER_8KHZ_MONO = 5
SOUND_NELLYMOSER = 6
SOUND_ALAW = 7
SOUND_MULAW = 8
SOUND_AAC = 10
SOUND_SPEEX = 11
SOUND_5_5Khz = 0
SOUND_11Khz = 1
SOUND_22Khz = 2
SOUND_44Khz = 3
SOUND_8BIT = 0
SOUND_16BIT = 1
SOUND_MONO = 0
SOUND_STEREO = 1
AAC_SEQHDR = 0
AAC_RAW = 1
)
const (
AVC_SEQHDR = 0
AVC_NALU = 1
AVC_EOS = 2
FRAME_KEY = 1
FRAME_INTER = 2
VIDEO_H264 = 7
)
var (
PUBLISH = "publish"
PLAY = "play"
)
// Header can be converted to AudioHeaderInfo or VideoHeaderInfo
type Packet struct {
IsAudio bool
IsVideo bool
IsMetadata bool
TimeStamp uint32 // dts
StreamID uint32
Header PacketHeader
Data []byte
}
type PacketHeader interface {
}
type AudioPacketHeader interface {
PacketHeader
SoundFormat() uint8
AACPacketType() uint8
}
type VideoPacketHeader interface {
PacketHeader
IsKeyFrame() bool
IsSeq() bool
CodecID() uint8
CompositionTime() int32
}
type Demuxer interface {
Demux(*Packet) (ret *Packet, err error)
}
type Muxer interface {
Mux(*Packet, io.Writer) error
}
type SampleRater interface {
SampleRate() (int, error)
}
type CodecParser interface {
SampleRater
Parse(*Packet, io.Writer) error
}
type GetWriter interface {
GetWriter(Info) WriteCloser
}
type Handler interface {
HandleReader(ReadCloser)
HandleWriter(WriteCloser)
}
type Alive interface {
Alive() bool
}
type Closer interface {
Info() Info
Close(error)
}
type CalcTime interface {
CalcBaseTimestamp()
}
type Info struct {
Key string
URL string
UID string
Inter bool
}
func (info Info) IsInterval() bool {
return info.Inter
}
func (info Info) String() string {
return fmt.Sprintf("<key: %s, URL: %s, UID: %s, Inter: %v>",
info.Key, info.URL, info.UID, info.Inter)
}
type ReadCloser interface {
Closer
Alive
Read(*Packet) error
}
type WriteCloser interface {
Closer
Alive
CalcTime
Write(*Packet) error
}