Documentation
¶
Overview ¶
Package wav defines WAV audio struct and Chunk struct. You can decode or encode WAV audio with this handy package.
WAV audio format reference: http://www.topherlee.com/software/pcm-tut-wavformat.html.
The header of WAV(RIFF) file is 44 bytes long and has following format:
| Positions | Sample Value | Description | |-----------|----------------|-------------------------------------------------------------| | 1 - 4 | "RIFF" | Marks the file as a RIFF file | | 5 - 8 | File size (u32)| Size of the overall file (fill this in after creation) | | 9 - 12 | "WAVE" | File type header | | 13 -16 | "fmt " | Format chunk marker | | 17 - 20 | 16 (u32) | Length of format data listed above | | 21 - 22 | 1 (u16) | Type of format (1 is PCM) | | 23 - 24 | 2 (u16) | Number channels | | 25 - 28 | 44100 (u32) | Sample rate | | 29 - 32 | 176400 (u32) | (Sample Rate * BitsPerSample * Channels) / 8 | | 33 - 34 | 4 (u16) | Sound: 1 - mono, 2 - stereo: (BitsPerSample * Channels) / 8 | | 35 - 36 | 16 (u16) | Bits per sample | | 37 - 40 | "data" | Data chunk header | | 41 - 44 | File size (u32)| Size of the data section |
Index ¶
Constants ¶
const (
AudioFormatPCM = 1
)
Variables ¶
var ( WaveHeader = []byte{'W', 'A', 'V', 'E'} RiffHeader = []byte{'R', 'I', 'F', 'F'} FmtHeader = []byte{'f', 'm', 't', ' '} DataHeader = []byte{'d', 'a', 't', 'a'} )
Functions ¶
Types ¶
type DecodeError ¶
type DecodeError string
func (DecodeError) Error ¶
func (e DecodeError) Error() string
Source Files