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waa.d.ts
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waa.d.ts
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// Type definitions for Web Audio API
// Project: http://www.w3.org/TR/webaudio/
// Definitions by: Baruch Berger <https://github.com/bbss>, Kon <http://phyzkit.net/>, kubosho <https://github.com/kubosho>
// Definitions: https://github.com/borisyankov/DefinitelyTyped
//
// This file refers to the latest published working draft (currently from 10 october 2013) http://www.w3.org/TR/2013/WD-webaudio-20131010/, not to be confused with the latest editor's draft http://webaudio.github.io/web-audio-api/
// DEPRECATED: use TypeScript 1.5.3
/// <reference path='../webrtc/MediaStream.d.ts' />
declare var webkitAudioContext: {
new (): AudioContext;
}
declare var webkitOfflineAudioContext: {
new (numberOfChannels: number, length: number, sampleRate: number): OfflineAudioContext;
}
declare enum ChannelCountMode {
'max',
'clamped-max',
'explicit'
}
declare enum ChannelInterpretation {
speakers,
discrete
}
declare enum PanningModelType {
/**
* A simple and efficient spatialization algorithm using equal-power panning.
*/
equalpower,
/**
* A higher quality spatialization algorithm using a convolution with measured impulse responses from human subjects. This panning method renders stereo output.
*/
HRTF
}
declare enum DistanceModelType {
/**
* A linear distance model which calculates distanceGain according to:
* 1 - rolloffFactor * (distance - refDistance) / (maxDistance - refDistance)
*/
linear,
/**
* An inverse distance model which calculates distanceGain according to:
* refDistance / (refDistance + rolloffFactor * (distance - refDistance))
*/
inverse,
/**
* An exponential distance model which calculates distanceGain according to:
* pow(distance / refDistance, -rolloffFactor)
*/
exponential
}
declare enum BiquadFilterType {
/**
* A lowpass filter allows frequencies below the cutoff frequency to pass through and attenuates frequencies above the cutoff. It implements a standard second-order resonant lowpass filter with 12dB/octave rolloff.
*
* ## frequency
* The cutoff frequency
* ## Q
* Controls how peaked the response will be at the cutoff frequency. A large value makes the response more peaked. Please note that for this filter type, this value is not a traditional Q, but is a resonance value in decibels.
* ## gain
* Not used in this filter type
*/
lowpass,
/**
* A highpass filter is the opposite of a lowpass filter. Frequencies above the cutoff frequency are passed through, but frequencies below the cutoff are attenuated. It implements a standard second-order resonant highpass filter with 12dB/octave rolloff.
*
* ## frequency
* The cutoff frequency below which the frequencies are attenuated
* ## Q
* Controls how peaked the response will be at the cutoff frequency. A large value makes the response more peaked. Please note that for this filter type, this value is not a traditional Q, but is a resonance value in decibels.
* ## gain
* Not used in this filter type
*/
highpass,
/**
* A bandpass filter allows a range of frequencies to pass through and attenuates the frequencies below and above this frequency range. It implements a second-order bandpass filter.
*
* ## frequency
* The center of the frequency band
* ## Q
* Controls the width of the band. The width becomes narrower as the Q value increases.
* ## gain
* Not used in this filter type
*/
bandpass,
/**
* The lowshelf filter allows all frequencies through, but adds a boost (or attenuation) to the lower frequencies. It implements a second-order lowshelf filter.
*
* ## frequency
* The upper limit of the frequences where the boost (or attenuation) is applied.
* ## Q
* Not used in this filter type.
* ## gain
* The boost, in dB, to be applied. If the value is negative, the frequencies are attenuated.
*/
lowshelf,
/**
* The highshelf filter is the opposite of the lowshelf filter and allows all frequencies through, but adds a boost to the higher frequencies. It implements a second-order highshelf filter
*
* ## frequency
* The lower limit of the frequences where the boost (or attenuation) is applied.
* ## Q
* Not used in this filter type.
* ## gain
* The boost, in dB, to be applied. If the value is negative, the frequencies are attenuated.
*/
highshelf,
/**
* The peaking filter allows all frequencies through, but adds a boost (or attenuation) to a range of frequencies.
*
* ## frequency
* The center frequency of where the boost is applied.
* ## Q
* Controls the width of the band of frequencies that are boosted. A large value implies a narrow width.
* ## gain
* The boost, in dB, to be applied. If the value is negative, the frequencies are attenuated.
*/
peaking,
/**
* The notch filter (also known as a band-stop or band-rejection filter) is the opposite of a bandpass filter. It allows all frequencies through, except for a set of frequencies.
*
* ## frequency
* The center frequency of where the notch is applied.
* ## Q
* Controls the width of the band of frequencies that are attenuated. A large value implies a narrow width.
* ## gain
* Not used in this filter type.
*/
notch,
/**
* An allpass filter allows all frequencies through, but changes the phase relationship between the various frequencies. It implements a second-order allpass filter
*
* ## frequency
* The frequency where the center of the phase transition occurs. Viewed another way, this is the frequency with maximal group delay.
* ## Q
* Controls how sharp the phase transition is at the center frequency. A larger value implies a sharper transition and a larger group delay.
* ## gain
* Not used in this filter type.
*/
allpass
}
declare enum OverSampleType {
'none',
'2x',
'4x'
}
declare enum OscillatorType {
sine,
square,
sawtooth,
triangle,
custom
}
interface AudioContextConstructor {
new(): AudioContext;
}
interface Window {
AudioContext: AudioContextConstructor;
}
interface AudioContext {
createMediaStreamSource(stream: MediaStream): MediaStreamAudioSourceNode;
}
interface MediaStreamAudioSourceNode extends AudioNode {
}
interface AudioBuffer {
copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
}
interface AudioNode {
disconnect(destination: AudioNode): void;
}
interface AudioContext {
suspend(): Promise<void>;
resume(): Promise<void>;
close(): Promise<void>;
}