audio

package
v0.0.0-...-f3d8a94 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Aug 26, 2018 License: MIT Imports: 12 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	Interleaved = iota + 1
	NonInterleaved
	Mono
)

layouts (earlier are considered better)

View Source 
const (
	Float32Type = iota + 1
	Int16Type
)

types (earlier are considered better)

View Source 
const Unspecified = 0

Variables

View Source 
var AudioEnvT = &abc.Type{"audio", true, abc.IsType((*context)(nil))}
View Source 
var Debug = false
View Source 
var SamplesT = &abc.Type{"samples", false, abc.IsType((*node)(nil))}
View Source 
var TimeT = &abc.Type{"time", true, abc.IsType(Time{})}

Functions

func CustomWave 

func CustomWave(rate int, samples []float32) (w *waveWidget)

func Level 

func Level(level float32, rate int) *levelWidget

func Register 

func Register(name string, kind widgetKind, argtype map[string]abc.Socket, fn func(status *abc.Status, args map[string]interface{}) Widget)

func SinWave 

func SinWave(freq float64, rate int) (w *waveWidget)

func WriteWav 

func WriteWav(filename string, input Widget) os.Error

Types

type Buffer 

type Buffer interface {
	Len() int
	Zero(i0, i1 int)
	Copy(i0 int, src Buffer, j0, j1 int)
	Slice(i0, i1 int) Buffer
	GetFormat() Format
}

type ContiguousFloat32Buffer 

type ContiguousFloat32Buffer interface {
	Buffer
	AsFloat32Buf() Float32Buf
	AllocFromFloat32Buf(buf Float32Buf) ContiguousFloat32Buffer
}

type ConverterWidget 

type ConverterWidget struct {
	// contains filtered or unexported fields
}

func Converter 

func Converter(input Widget, f Format) (w *ConverterWidget)

func (*ConverterWidget) GetFormat 

func (w *ConverterWidget) GetFormat(name string) (f Format)

func (*ConverterWidget) Init 

func (w *ConverterWidget) Init(inputs map[string]Widget)

func (*ConverterWidget) ReadSamples 

func (w *ConverterWidget) ReadSamples(b Buffer, t int64) bool

type DelayWidget 

type DelayWidget struct {
	Format
	// contains filtered or unexported fields
}

func (*DelayWidget) Init 

func (w *DelayWidget) Init(inputs map[string]Widget)

func (*DelayWidget) ReadSamples 

func (w *DelayWidget) ReadSamples(samples Buffer, p0 int64) bool

type EnvelopeWidget 

type EnvelopeWidget struct {
	Format
	// contains filtered or unexported fields
}

func Envelope 

func Envelope(t0 int64, rate int, attack, decay, sustain, release int64, sustainlev float32) *EnvelopeWidget

func (*EnvelopeWidget) Init 

func (w *EnvelopeWidget) Init(_ map[string]Widget)

func (*EnvelopeWidget) ReadSamples 

func (w *EnvelopeWidget) ReadSamples(b Buffer, t int64) (r bool)

func (*EnvelopeWidget) SetFormat 

func (w *EnvelopeWidget) SetFormat(f Format)

type Float32Buf 

type Float32Buf []float32

func (Float32Buf) Copy 

func (b Float32Buf) Copy(i0 int, src Buffer, j0, j1 int)

func (Float32Buf) GetFormat 

func (b Float32Buf) GetFormat() Format

func (Float32Buf) Len 

func (b Float32Buf) Len() int

func (Float32Buf) Slice 

func (b Float32Buf) Slice(i0, i1 int) Buffer

func (Float32Buf) Zero 

func (b Float32Buf) Zero(i0, i1 int)

type Float32NBuf 

type Float32NBuf []Float32Buf

n separate channels

func AllocFloat32NBuf 

func AllocFloat32NBuf(nchans, n int) Float32NBuf

func (Float32NBuf) Copy 

func (b0 Float32NBuf) Copy(i0 int, b1 Buffer, j0, j1 int)

func (Float32NBuf) GetFormat 

func (b Float32NBuf) GetFormat() Format

func (Float32NBuf) Len 

func (b Float32NBuf) Len() int

func (Float32NBuf) Permute 

func (b0 Float32NBuf) Permute(p []int) Float32NBuf

each item in p represents a channel in the new buffer; its value is which channel it comes from. if it's -1, then we create a zero'd buffer

func (Float32NBuf) Slice 

func (b Float32NBuf) Slice(i0, i1 int) Buffer

func (Float32NBuf) Zero 

func (b Float32NBuf) Zero(i0, i1 int)

type Format 

type Format struct {
	NumChans int // number of channels (0 if unset)
	Rate     int // samples per second (0 if unset)
	Layout   int
	Type     int
}

func (Format) AllocBuffer 

func (f Format) AllocBuffer(n int) Buffer

func (Format) Combine 

func (f0 Format) Combine(f1 Format) Format

set all the unspecified fields in f0 to values taken from f1.

func (Format) CombineBest 

func (f0 Format) CombineBest(f1 Format) Format

func (Format) Eq 

func (f0 Format) Eq(f1 Format) bool

func (Format) FullySpecified 

func (f Format) FullySpecified() bool

func (Format) GetFormat 

func (f Format) GetFormat(_ string) Format

func (Format) Match 

func (f0 Format) Match(f1 Format) bool

func (Format) TimeToSamples 

func (f Format) TimeToSamples(t Time) int64

type FormatSetter 

type FormatSetter interface {
	SetFormat(f Format)
}

type Formatted 

type Formatted interface {
	GetFormat(name string) Format
}

type GraphWidget 

type GraphWidget struct {
	Format
	// contains filtered or unexported fields
}

func (*GraphWidget) Init 

func (w *GraphWidget) Init(inputs map[string]Widget)

func (*GraphWidget) ReadSamples 

func (w *GraphWidget) ReadSamples(_ Buffer, _ int64) bool

type Int16Buf 

type Int16Buf []int16

func (Int16Buf) Copy 

func (b Int16Buf) Copy(i0 int, src Buffer, j0, j1 int)

func (Int16Buf) GetFormat 

func (b Int16Buf) GetFormat() Format

func (Int16Buf) Len 

func (b Int16Buf) Len() int

func (Int16Buf) Slice 

func (b Int16Buf) Slice(i0, i1 int) Buffer

func (Int16Buf) Zero 

func (b Int16Buf) Zero(i0, i1 int)

type LayoutConverterWidget 

type LayoutConverterWidget struct {
	Format
	// contains filtered or unexported fields
}

func (*LayoutConverterWidget) GetFormat 

func (w *LayoutConverterWidget) GetFormat(name string) Format

func (*LayoutConverterWidget) Init 

func (w *LayoutConverterWidget) Init(_ map[string]Widget)

func (*LayoutConverterWidget) ReadSamples 

func (w *LayoutConverterWidget) ReadSamples(b Buffer, t int64) bool

type MixWidget 

type MixWidget struct {
	Format
	// contains filtered or unexported fields
}

func Mixer 

func Mixer(carryOn bool, ws []Widget) *MixWidget

func (*MixWidget) Init 

func (w *MixWidget) Init(inputs map[string]Widget)

func (*MixWidget) ReadSamples 

func (w *MixWidget) ReadSamples(buf Buffer, t int64) bool

type MultiplierWidget 

type MultiplierWidget struct {
	Format
	// contains filtered or unexported fields
}

func Multiplier 

func Multiplier(w0, w1 Widget) *MultiplierWidget

func (*MultiplierWidget) Init 

func (w *MultiplierWidget) Init(inputs map[string]Widget)

func (*MultiplierWidget) ReadSamples 

func (w *MultiplierWidget) ReadSamples(b Buffer, t int64) bool

type NFloat32Buf 

type NFloat32Buf struct {
	NumChans int
	Size     int
	Buf      Float32Buf
}

n channels interleaved

func AllocNFloat32Buf 

func AllocNFloat32Buf(nchans, n int) NFloat32Buf

func (NFloat32Buf) AllocFromFloat32Buf 

func (b NFloat32Buf) AllocFromFloat32Buf(buf Float32Buf) ContiguousFloat32Buffer

func (NFloat32Buf) AsFloat32Buf 

func (b NFloat32Buf) AsFloat32Buf() Float32Buf

func (NFloat32Buf) Copy 

func (b0 NFloat32Buf) Copy(i0 int, b1 Buffer, j0, j1 int)

func (NFloat32Buf) GetFormat 

func (b NFloat32Buf) GetFormat() Format

func (NFloat32Buf) Len 

func (b NFloat32Buf) Len() int

func (NFloat32Buf) Slice 

func (b NFloat32Buf) Slice(i0, i1 int) Buffer

func (NFloat32Buf) Zero 

func (b NFloat32Buf) Zero(i0, i1 int)

type PermuteWidget 

type PermuteWidget struct {
	Format
	// contains filtered or unexported fields
}

func Permute 

func Permute(input Widget, p []int) *PermuteWidget

func (*PermuteWidget) Init 

func (w *PermuteWidget) Init(inputs map[string]Widget)

func (*PermuteWidget) ReadSamples 

func (w *PermuteWidget) ReadSamples(b Buffer, t int64) bool

type PhaserState 

type PhaserState struct {
	// contains filtered or unexported fields
}

type PhaserWidget 

type PhaserWidget struct {
	Format
	// contains filtered or unexported fields
}

func (*PhaserWidget) Init 

func (w *PhaserWidget) Init(inputs map[string]Widget)

func (*PhaserWidget) ReadSamples 

func (w *PhaserWidget) ReadSamples(b Buffer, t int64) bool

type Rerror 

type Rerror string

type RingBufReader 

type RingBufReader struct {
	Lag      int  // time delta (i.e. latency); zero implies primary output
	Blocking bool // Read can block for this reader?
	// contains filtered or unexported fields
}

func (*RingBufReader) Close 

func (r *RingBufReader) Close()

func (*RingBufReader) GetFormat 

func (r *RingBufReader) GetFormat(name string) Format

func (*RingBufReader) Init 

func (r *RingBufReader) Init(_ map[string]Widget)

func (*RingBufReader) ReadSamples 

func (r *RingBufReader) ReadSamples(samples Buffer, p0 int64) bool

func (*RingBufReader) SetFormat 

func (r *RingBufReader) SetFormat(f Format)

type RingBufWidget 

type RingBufWidget struct {
	// contains filtered or unexported fields
}

func RingBuf 

func RingBuf(input Widget, size, maxsize int, readBufSize int) *RingBufWidget

func (*RingBufWidget) Close 

func (b *RingBufWidget) Close()

func (*RingBufWidget) GetFormat 

func (b *RingBufWidget) GetFormat(name string) Format

func (*RingBufWidget) Init 

func (b *RingBufWidget) Init(inputs map[string]Widget)

func (*RingBufWidget) ReadSamples 

func (b *RingBufWidget) ReadSamples(_ Buffer, _ int64) bool

func (*RingBufWidget) Reader 

func (b *RingBufWidget) Reader(blocking bool, lag int) *RingBufReader

func (*RingBufWidget) SetFormat 

func (b *RingBufWidget) SetFormat(fmt Format)

func (*RingBufWidget) SetMaxSize 

func (b *RingBufWidget) SetMaxSize(bufsize int)

func (*RingBufWidget) SetSizes 

func (b *RingBufWidget) SetSizes(size, maxsize, readBufSize int)

type Time 

type Time struct {
	// contains filtered or unexported fields
}

func ParseTime 

func ParseTime(s string) (t Time, err os.Error)

ParseTime parses the time interval from s, and returns it as nanoseconds, if it is representable in seconds (with isNanoSeconds true), or sample count (with isNanoSeconds false) if not.

type WavReader 

type WavReader struct {
	Format
	// contains filtered or unexported fields
}

func OpenWavReader 

func OpenWavReader(filename string) (r *WavReader, err os.Error)

func (*WavReader) Init 

func (w *WavReader) Init(_ map[string]Widget)

func (*WavReader) ReadSamples 

func (r *WavReader) ReadSamples(b Buffer, p int64) bool

type WavWriter 

type WavWriter struct {
	Format
	// contains filtered or unexported fields
}

func (*WavWriter) Init 

func (w *WavWriter) Init(inputs map[string]Widget)

func (*WavWriter) ReadSamples 

func (w *WavWriter) ReadSamples(_ Buffer, _ int64) bool

type Widget 

type Widget interface {
	Formatted
	Init(inputs map[string]Widget)
	ReadSamples(buf Buffer, t int64) bool
}

func Delay 

func Delay(input Widget, delay int) Widget

func LayoutConverter 

func LayoutConverter(input Widget, layout int) Widget

type WritableRingBufWidget 

type WritableRingBufWidget struct {
	RingBufWidget
}

func WriteableRingBuf 

func WriteableRingBuf(size, maxsize int, wblocking bool, fmt Format) *WritableRingBufWidget

func (*WritableRingBufWidget) SampleWrite 

func (b *WritableRingBufWidget) SampleWrite(samples Buffer, p0 int64)

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.