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does not work

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or-else
2022-12-02 14:37:26 -08:00
parent 57a062266f
commit d54e4a8153
7 changed files with 8257 additions and 65 deletions
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src/widgets/audio-recorder.jsx
+28 -1
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@@ -5,6 +5,7 @@ import React from 'react';
import AudioPlayer from './audio-player.jsx';
// Workaround for https://bugs.chromium.org/p/chromium/issues/detail?id=642012
// import fixWebmDuration from 'fix-webm-duration';
import * as ebml from 'ts-ebml';
import { intArrayToBase64 } from '../lib/blob-helpers.js'
import { secondsToTime } from '../lib/strformat';
@@ -269,12 +270,38 @@ export default class AudioRecorder extends React.PureComponent {
// Obtain data in a form sutable for sending or playing back.
// If duration is valid, apply fix for Chrome's WebM duration bug.
getRecording(mimeType, duration) {
let blob = new Blob(this.audioChunks, {type: mimeType || AUDIO_MIME_TYPE});
mimeType = mimeType || AUDIO_MIME_TYPE;
let blob = new Blob(this.audioChunks, {type: mimeType});
return this.tempFixMetadata(blob, mimeType)
.then(fixedBlob => { blob = fixedBlob; return fixedBlob.arrayBuffer(); })
.then(arrayBuff => this.audioContext.decodeAudioData(arrayBuff))
.then(decoded => this.createPreview(decoded))
.then(preview => ({url: window.URL.createObjectURL(blob), preview: intArrayToBase64(preview)}));
/*
return (duration > 0 ? ysFixWebmDuration(blob, duration, {logger: false}) : Promise.resolve(blob))
.then(fixedBlob => { blob = fixedBlob; return fixedBlob.arrayBuffer(); })
.then(arrayBuff => this.audioContext.decodeAudioData(arrayBuff))
.then(decoded => this.createPreview(decoded))
.then(preview => ({url: window.URL.createObjectURL(blob), preview: intArrayToBase64(preview)}));
*/
}
tempFixMetadata(blob, mimeType) {
const decoder = new ebml.Decoder();
const reader = new ebml.Reader();
reader.logging = true;
reader.logGroup = "Raw WebM file";
reader.drop_default_duration = false;
let webmBuf;
blob.arrayBuffer()
.then(buf => { webmBuf = buf; return decoder.decode(buf); })
.then(elms => {
elms.forEach(elm => reader.read(elm))
reader.stop();
const fixedMetadataBuf = ebml.tools.makeMetadataSeekable(reader.metadatas, reader.duration, reader.cues);
const body = webmBuf.slice(reader.metadataSize);
return new Blob([fixedMetadataBuf, body], {type: mimeType});
});
}
// Preview must be calculated at the source: Chrome does not allow background AudioContext.