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Use vendor prefixed offline audio context for safari

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This commit is contained in:
Paul Kaplan committed 2019-12-12 15:57:25 -05:00
1 parent 748f8559e4
commit 914ba4910b
1 file changed
+22 -17
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src/containers/sound-editor.jsx
+22 -17
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@@ -325,25 +325,30 @@ class SoundEditor extends React.Component {
});
}
resampleBufferToRate (buffer, newRate) {
return new Promise(resolve => {
return new Promise((resolve, reject) => {
const sampleRateRatio = newRate / buffer.sampleRate;
const newLength = sampleRateRatio * buffer.samples.length;
let offlineContext;
if (window.OfflineAudioContext) {
const sampleRateRatio = newRate / buffer.sampleRate;
const newLength = sampleRateRatio * buffer.samples.length;
const offlineContext = new window.OfflineAudioContext(1, newLength, newRate);
const source = offlineContext.createBufferSource();
const audioBuffer = offlineContext.createBuffer(1, buffer.samples.length, buffer.sampleRate);
audioBuffer.getChannelData(0).set(buffer.samples);
source.buffer = audioBuffer;
source.connect(offlineContext.destination);
source.start();
offlineContext.startRendering();
offlineContext.oncomplete = ({renderedBuffer}) => {
resolve({
samples: renderedBuffer.getChannelData(0),
sampleRate: newRate
});
};
offlineContext = new window.OfflineAudioContext(1, newLength, newRate);
} else if (window.webkitOfflineAudioContext) {
offlineContext = new window.webkitOfflineAudioContext(1, newLength, newRate);
} else {
return reject('No offline audio context');
}
const source = offlineContext.createBufferSource();
const audioBuffer = offlineContext.createBuffer(1, buffer.samples.length, buffer.sampleRate);
audioBuffer.getChannelData(0).set(buffer.samples);
source.buffer = audioBuffer;
source.connect(offlineContext.destination);
source.start();
offlineContext.startRendering();
offlineContext.oncomplete = ({renderedBuffer}) => {
resolve({
samples: renderedBuffer.getChannelData(0),
sampleRate: newRate
});
};
});
}
paste () {