From 914ba4910b111929f404a82aea5eb59022aaeb11 Mon Sep 17 00:00:00 2001
From: Paul Kaplan <pkaplan@media.mit.edu>
Date: Thu, 12 Dec 2019 15:57:25 -0500
Subject: [PATCH] Use vendor prefixed offline audio context for safari
---
src/containers/sound-editor.jsx | 39 +++++++++++++++++++--------------
1 file changed, 22 insertions(+), 17 deletions(-)
diff --git a/src/containers/sound-editor.jsx b/src/containers/sound-editor.jsx
index 0ce73b2f6..c9826ab4d 100644
--- a/src/containers/sound-editor.jsx
+++ b/src/containers/sound-editor.jsx
@@ -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 () {
--
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