audio

Documentation

Index

• Variables
• type Codec
  • func Identify(file string) (Codec, error)
  • func (c Codec) String() string
• type Metadata
  • func ReadMetadata(file string) (Metadata, error)

Variables

var MetadataReaders = make(map[Codec]func(string) (Metadata, error))

var Stats struct {
	Identify     stat.Run
	ReadMetadata stat.Run
}

Types

type Codec

type Codec int

const (
	Unknown Codec = iota

	WAV // Wave­form Audio File For­mat

	ALAC // Apple Lossless Audio Codec
	FLAC // Free Lossless Audio Codec
	APE  // Monkey's Audio
	OFR  // OptimFROG
	TAK  // Tom's verlustfreier Audiokompressor
	WV   // WavPack
	TTA  // True Audio
	WMAL // Windows Media Audio Lossless

	MP3 // MPEG-Lyaer 3 Audio
	M4A // MPEG4 Audio
	M4B // MPEG4 Audio Book
	M4P // MPEG4 Protected Audio
	AAC // Advanced Audio Coding
	OGG // Vorbis
	WMA // Windows Media Audio
)

func Identify

func Identify(file string) (Codec, error)

func (Codec) String

func (c Codec) String() string

type Metadata

type Metadata interface {
	Title() string         // The primary song title
	Album() string         // The album the song belongs to
	Artist() string        // The primary performer/artist of the song
	AlbumArtist() string   // The album artist
	Composer() string      // The composer of the song
	Year() int             // The release year of the song (not necessarily recording year)
	Genre() string         // The genre of the song
	Track() (int, int)     // The track number of the song, 0 for unknown
	Disc() (int, int)      // The disc number of the song, 0 for unknown
	Length() time.Duration // The length of the song in milliseconds
	Comment() string       // A comment
	Copyright() string     // Copyright notice, usually in the form YYYY Name
	Website() string       // Website of the performer

	EncodedBy() string       // Who encoded the audio
	EncoderSettings() string // Any specific encoder settings
	Encoding() Codec         // Codec returns the file codec, or Unknown.
	EncodingBitrate() int    // Bitrate returns the file bitrate in Kbps, or -1 if unknown.

	OriginalFilename() string // The original filename of the song
}

func ReadMetadata

func ReadMetadata(file string) (Metadata, error)