README
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GoWave
This library is intended to help me with converting C code from "The Audio Programming Book" into Go code. The format for the wave file can be found: https://web.archive.org/web/20141213140451/https://ccrma.stanford.edu/courses/422/projects/WaveFormat/
Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
var ( ChunkID = []byte{0x52, 0x49, 0x46, 0x46} // RIFF BigEndianChunkID = []byte{0x52, 0x49, 0x46, 0x58} // RIFX WaveID = []byte{0x57, 0x41, 0x56, 0x45} // WAVE Format = []byte{0x66, 0x6d, 0x74, 0x20} // FMT Subchunk2ID = []byte{0x64, 0x61, 0x74, 0x61} // DATA )
Consts that appear in the .WAVE file format
Functions ¶
func BatchSamples ¶
BatchSamples batches the samples per requested timespan expressed in seconds
Types ¶
type Frame ¶
type Frame float64
Frame is a single float64 value of raw audio data
func FloatsToFrames ¶ added in v0.11.0
FloatsToFrames turns a slice of float64 to a slice of frames
type Wave ¶
type Wave struct {
WaveHeader
WaveFmt
WaveData
}
Wave represents an entire .wav audio file
func ReadWaveFile ¶
ReadWaveFile parses a .wave file into a Wave struct
type WaveData ¶
type WaveData struct {
Subchunk2ID []byte // Identifier of subchunk
Subchunk2Size int // size of raw sound data
RawData []byte // raw sound data itself
Frames []Frame
}
WaveData contains the raw sound data
type WaveFmt ¶
type WaveFmt struct {
Subchunk1ID []byte // should contain "fmt"
Subchunk1Size int // 16 for PCM
AudioFormat int // PCM = 1 (Linear Quantization), if not 1, compression was used.
NumChannels int // Mono 1, Stereo = 2, ..
SampleRate int // 44100 for CD-Quality, etc..
ByteRate int // SampleRate * NumChannels * BitsPerSample / 8
BlockAlign int // NumChannels * BitsPerSample / 8 (number of bytes per sample)
BitsPerSample int // 8 bits = 8, 16 bits = 16, .. :-)
ExtraParamSize int // if not PCM, can contain extra params
ExtraParams []byte // the actual extra params.
}
WaveFmt describes the format of the sound-information in the data subchunks
func NewWaveFmt ¶
NewWaveFmt can be used to generate a complete WaveFmt by calculating the remaining props
func (*WaveFmt) SetChannels ¶
SetChannels changes the FMT to adapt to a new amount of channels
type WaveHeader ¶
type WaveHeader struct {
ChunkID []byte // should be RIFF on little-endian or RIFX on big-endian systems..
ChunkSize int
Format string // sanity-check, should be WAVE (//TODO: keep as []byte?)
}
WaveHeader describes the header each WAVE file should start with
Source Files