22 lines
713 B
TypeScript
22 lines
713 B
TypeScript
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class AudioResampler {
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targetSampleRate: number;
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constructor(targetSampleRate: number = 44100){
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this.targetSampleRate = targetSampleRate;
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}
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resample(buffer: AudioBuffer) : Promise<AudioBuffer> {
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if(buffer.sampleRate == this.targetSampleRate)
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return new Promise<AudioBuffer>(resolve => resolve(buffer));
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let context;
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context = new OfflineAudioContext(1, Math.ceil(buffer.length * this.targetSampleRate / buffer.sampleRate), this.targetSampleRate);
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let source = context.createBufferSource();
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source.buffer = buffer;
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source.connect(context.destination);
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source.start(0);
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return context.startRendering();
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}
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}
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