m3u8

type Alternative struct {
	GroupID         string
	URI             string
	Type            string
	Language        string
	Name            string
	Default         bool
	Autoselect      string
	Forced          string
	Characteristics string
	Subtitles       string
}

type Key struct {
	Method            string
	URI               string
	IV                string
	Keyformat         string
	Keyformatversions string
}

type ListType uint

type Map struct {
	URI    string
	Limit  int64 // <n> is length in bytes for the file under URI
	Offset int64 // [@o] is offset from the start of the file under URI
}

type MasterPlaylist struct {
	Variants      []*Variant
	Args          string // optional arguments placed after URI (URI?Args)
	CypherVersion string // non-standard tag for Widevine (see also WV struct)

	Ver uint8
	// contains filtered or unexported fields
}

type MediaPlaylist struct {
	Segments  []*MediaSegment
	MediaType MediaType

	Key            *Key   // EXT-X-KEY is optional encryption key displayed before any segments (default key for the playlist)
	Map            *Map   // EXT-X-MAP is optional tag specifies how to obtain the Media Initialization Section (default map for the playlist)
	WV             *WV    // Widevine related tags outside of M3U8 specs
	Args           string // optional arguments placed after URIs (URI?Args)
	TargetDuration float64
	Winsize        uint // max number of segments displayed in an encoded playlist; need set to zero for VOD playlists

	SeqNo  uint64 // EXT-X-MEDIA-SEQUENCE
	Ver    uint8
	Iframe bool // EXT-X-I-FRAMES-ONLY
	Closed bool // is this VOD (closed) or Live (sliding) playlist?
	// contains filtered or unexported fields
}

type MediaSegment struct {
	SeqID           uint64
	Title           string // optional second parameter for EXTINF tag
	URI             string
	Duration        float64   // first parameter for EXTINF tag; duration must be integers if protocol version is less than 3 but we are always keep them float
	Limit           int64     // EXT-X-BYTERANGE <n> is length in bytes for the file under URI
	Offset          int64     // EXT-X-BYTERANGE [@o] is offset from the start of the file under URI
	Key             *Key      // EXT-X-KEY displayed before the segment and means changing of encryption key (in theory each segment may have own key)
	Map             *Map      // EXT-X-MAP displayed before the segment
	Discontinuity   bool      // EXT-X-DISCONTINUITY indicates an encoding discontinuity between the media segment that follows it and the one that preceded it (i.e. file format, number and type of tracks, encoding parameters, encoding sequence, timestamp sequence)
	SCTE            *SCTE     // EXT-SCTE35 used for Ad signaling in HLS
	ProgramDateTime time.Time // EXT-X-PROGRAM-DATE-TIME tag associates the first sample of a media segment with an absolute date and/or time
}

type MediaType uint

type Playlist interface {
	Encode() *bytes.Buffer
	Decode(bytes.Buffer, bool) error
	DecodeFrom(reader io.Reader, strict bool) error
	String() string
}

type SCTE struct {
	Cue  string
	ID   string
	Time float64
}

type Variant struct {
	URI       string
	Chunklist *MediaPlaylist
	VariantParams
}

type VariantParams struct {
	ProgramID    uint32
	Bandwidth    uint32
	Codecs       string
	Resolution   string
	Audio        string // EXT-X-STREAM-INF only
	Video        string
	Subtitles    string         // EXT-X-STREAM-INF only
	Captions     string         // EXT-X-STREAM-INF only
	Name         string         // EXT-X-STREAM-INF only (non standard Wowza/JWPlayer extension to name the variant/quality in UA)
	Iframe       bool           // EXT-X-I-FRAME-STREAM-INF
	Alternatives []*Alternative // EXT-X-MEDIA
}

type WV struct {
	AudioChannels          uint
	AudioFormat            uint
	AudioProfileIDC        uint
	AudioSampleSize        uint
	AudioSamplingFrequency uint
	CypherVersion          string
	ECM                    string
	VideoFormat            uint
	VideoFrameRate         uint
	VideoLevelIDC          uint
	VideoProfileIDC        uint
	VideoResolution        string
	VideoSAR               string
}