pcm

package

v0.0.0-...-8f00a11 Latest Latest Go to latest Published: Oct 19, 2016 License: MIT Imports: 2 Imported by: 0

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func DBAmplitude(gain float64) (db float64)

DBAmplitude converts from amplitude to power gain.

func DBSquaredAmplitude(gain float64) (db float64)

DBSquaredAmplitude converts from squared amplitude to power gain.

func FloatInterleave(l, r []float64) ([]float64, error)

FloatInterleave interleaves left and right (dual mono) channels to a stereo interleaved channel.

func FloatMix(a, b []float64, negate bool, normalize float64) ([]float64, error)

FloatMix mixes two sample buffers normalized by a constant.

type FloatAGC struct {
	Attack float64
	Decay  float64
	// contains filtered or unexported fields
}

FloatAGC implements Automatic Gain Control, value settles in range (-0.5, +0.5).

func NewFloatAGC(attack, decay float64) *FloatAGC

NewFloatAGCC starts a new FloatAGC block.

func (agc *FloatAGC) Process(in float64) float64

Process a sample.

type FloatSamples []float64

func (s FloatSamples) Deinterleave() ([]float64, []float64, error)

Deinterleave a stereo interleaved channel to dual mono left and right.

func (s FloatSamples) Peak() float64

Peak value of a buffer.

func (s FloatSamples) RMS() float64

RMS value of a buffer.