README
¶
wav
Simple package for work with wav
WAV file structure
| Offset(byte) | Size(byte) | Name | Description |
|---|---|---|---|
| 0 | 4 | chunkId | Contains "RIFF" characters in ASCII encoding. It is the beginning of the RIFF chain. |
| 4 | 4 | chunkSize | This is the remaining chain size from that position. In other words, this is the file size minus 8, that is, the chunkId and chunkSize fields are excluded. |
| 8 | 4 | format | Contains "WAVE" symbols |
| 12 | 4 | subchunk1Id | Contains the characters "fmt " |
| 16 | 4 | subchunk1Size | 16 for PCM format. This is the remaining size of the chain from this position. |
| 20 | 2 | audioFormat | Audio format, list of acceptable formats. For PCM = 1 (that is, Linear Quantization). Values other than 1 indicate some compression format. |
| 22 | 2 | numChannels | Number of channels. Mono = 1, Stereo = 2, etc. |
| 24 | 4 | sampleRate | Sampling frequency. 8000 Hz, 44100 Hz, etc. |
| 28 | 4 | byteRate | The number of bytes transferred per second of playback. |
| 32 | 2 | blockAlign | The number of bytes for one sample, including all channels. |
| 34 | 2 | bitsPerSample | The number of bits in the sample. The so-called "depth" or accuracy of sound. 8 bits, 16 bits, etc. |
| 36 | 4 | subchunk2Id | Contains symbols "data" |
| 40 | 4 | subchunk2Size | The number of bytes in the data area. |
| 44 | ... | data | WAV audio data. |
Example
import "github.com/geoirb/wav"
Read .wav file
data, _ := ioutil.ReadFile("path-file.wav")
wav.NewReader(data)
Create .wav file
file, _ := os.Create("path-file.wav")
w := wav.NewWriter(file, 2, 44100, wav.S16LE)
var data []byte
for {
// read audio data
// ...
w.Write(data)
// ...
}
w.Close()
Documentation
¶
Index ¶
- Constants
- Variables
- func ExampleReader()
- func ExampleWriter()
- type Reader
- func (r *Reader) GetAudioFormat() uint16
- func (r *Reader) GetBitsPerSample() uint16
- func (r *Reader) GetBlockAlign() uint16
- func (r *Reader) GetByteRate() uint32
- func (r *Reader) GetChunkID() []byte
- func (r *Reader) GetChunkSize() uint32
- func (r *Reader) GetFormat() []byte
- func (r *Reader) GetNumChannels() uint16
- func (r *Reader) GetSampleRate() uint32
- func (r *Reader) GetSubchunk1ID() []byte
- func (r *Reader) GetSubchunk1Size() uint32
- func (r *Reader) GetSubchunk2ID() []byte
- func (r *Reader) GetSubchunk2Size() uint32
- func (r *Reader) Read(data []byte) (n int, err error)
- type Writer
Constants ¶
View Source
const ( // S16LE Signed 16 bit Little Endian S16LE = 16 // S24LE Signed 24 bit Little Endian S24LE = 24 // S32LE Signed 32 bit Little Endian S32LE = 32 )
Variables ¶
View Source
var (
ErrSmallSize = errors.New("small size of data")
)
errors
Functions ¶
Types ¶
type Reader ¶
type Reader struct {
// contains filtered or unexported fields
}
Reader wav
func (*Reader) GetAudioFormat ¶
GetAudioFormat audio format
func (*Reader) GetBitsPerSample ¶
GetBitsPerSample number of bits in the sample
func (*Reader) GetBlockAlign ¶
GetBlockAlign number of bytes for one sample
func (*Reader) GetByteRate ¶
GetByteRate number of bytes transferred per second of playback
func (*Reader) GetChunkSize ¶
GetChunkSize size from that position
func (*Reader) GetNumChannels ¶
GetNumChannels number of channels
func (*Reader) GetSampleRate ¶
GetSampleRate sampling frequency
func (*Reader) GetSubchunk2Size ¶
GetSubchunk2Size number of bytes in the data area
Source Files
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