flv

const (
	SoundFormatLinearPCMPlatformEndian         = 0
	SoundFormatADPCM                           = 1
	SoundFormatMP3                             = 2
	SoundFormatLinearPCMLittleEndian           = 3
	SoundFormatNellymoser16kHzMono             = 4
	SoundFormatNellymoser8kHzMono              = 5
	SoundFormatNellymoser                      = 6
	SoundFormatReservedG711AlawLogarithmicPCM  = 7
	SoundFormatReservedG711MuLawLogarithmicPCM = 8
	SoundFormatReserved                        = 9
	SoundFormatAAC                             = 10
	SoundFormatSpeex                           = 11
	SoundFormatReservedMP3Of8kHz               = 14
	SoundFormatReservedDeviceSpecificSound     = 15
	SoundFormatReserved1                       = 16
)

const (
	SoundRate5512     = 0
	SoundRate11025    = 1
	SoundRate22050    = 2
	SoundRate44100    = 3
	SoundRateReserved = 4
)

const (
	SoundeSize8bit     = 0
	SoundeSize16bit    = 1
	SoundeSizeReserved = 2
)

const (
	SoundTypeMono     = 0
	SoundTypeStereo   = 1
	SoundTypeReserved = 2
)

const (
	AACPacketTypeSequenceHeader = 0 // 序列头
	AACPacketTypeRawData        = 1 // 原始数据
	AACPacketTypeReserved       = 2
)

const (
	FlvHeaderSize   = 9
	TypeFlagsVideo  = 0x04
	TypeFlagsAudio  = 0x01
	TypeFlagsOffset = 4
)

const (
	MetaDataAudioCodecID    = "audiocodecid"    // Number	音频编解码器 ID
	MetaDataAudioDateRate   = "audiodatarate"   // Number	音频码率，单位 kbps
	MetaDataAudioDelay      = "audiodelay"      // Number	由音频编解码器引入的延时，单位秒
	MetaDataAudioSampleRate = "audiosamplerate" // Number	音频采样率
	MetaDataAudioSampleSize = "audiosamplesize" // Number	音频采样点尺寸
	MetaDataStereo          = "stereo"          // Boolean	音频立体声标志
	MetaDataCanSeekToEnd    = "canSeekToEnd"    // Boolean	指示最后一个视频帧是否是关键帧
	MetaDataCreationDate    = "creationdate"    // String	创建日期与时间
	MetaDataDuration        = "duration"        // Number	文件总时长，单位秒
	MetaDataFileSize        = "filesize"        // Number	文件总长度，单位字节
	MetaDataFrameRate       = "framerate"       // Number	视频帧率
	MetaDataHeight          = "height"          // Number	视频高度，单位像素
	MetaDataVideoCodecID    = "videocodecid"    // Number	视频编解码器 ID
	MetaDataVideoDataRate   = "videodatarate"   // Number	视频码率，单位 kbps
	MetaDataWidth           = "width"           // Number	视频宽度，单位像素
)

const (
	TagTypeAudio    = 0x08
	TagTypeVideo    = 0x09
	TagTypeAmf0Data = 0x12 // 18
)

const (
	FrameTypeReserved             = 0
	FrameTypeKeyFrame             = 1 // video h264 key frame
	FrameTypeInterFrame           = 2 // video h264 inter frame
	FrameTypeDisposableInterFrame = 3
	FrameTypeGeneratedKeyFrame    = 4
	FrameTypeVideoInfoFrame       = 5
	FrameTypeReserved1            = 6
)

const (
	CodecIDReserved               = 0
	CodecIDReserved1              = 1
	CodecIDSorensonH263           = 2
	CodecIDScreenVideo            = 3
	CodecIDOn2VP6                 = 4
	CodecIDOn2VP6WithAlphaChannel = 5
	CodecIDScreenVideoVersion2    = 6
	CodecIDAVC                    = 7 // h264
	CodecIDReserved2              = 8
	CodecIDHEVC                   = 12 // 事实扩展标识 h265
)

const (
	H2645PacketTypeSequenceHeader    = 0
	H2645PacketTypeNALU              = 1
	H2645PacketTypeSequenceHeaderEOF = 2
	H2645PacketTypeReserved          = 3
)

const (
	ScriptOnMetaData = "onMetaData"
)

const (
	TagHeaderSize = 11
)