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/* |
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* Copyright (c) 2017-2018 Rafael da Silva Rocha. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining |
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* a copy of this software and associated documentation files (the |
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* "Software"), to deal in the Software without restriction, including |
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* without limitation the rights to use, copy, modify, merge, publish, |
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* distribute, sublicense, and/or sell copies of the Software, and to |
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* permit persons to whom the Software is furnished to do so, subject to |
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* the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be |
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* included in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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* |
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*/ |
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/** |
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* @fileoverview The WaveFile class. |
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* @see https://github.com/rochars/wavefile |
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*/ |
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/** @module wavefile */ |
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import bitDepthLib from './vendor/bitdepth.js'; |
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import * as imaadpcm from './vendor/imaadpcm.js'; |
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import * as alawmulaw from './vendor/alawmulaw.js'; |
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import {encode, decode} from './vendor/base64-arraybuffer-es6.js'; |
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import {unpackArray, packArrayTo, unpackArrayTo} from './vendor/byte-data.js'; |
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import {wavHeader, validateHeader_} from './lib/wavheader.js'; |
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import {riffChunks, findChunk_} from './vendor/riff-chunks.js'; |
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import BufferIO from './lib/bufferio.js'; |
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import writeWavBuffer from './lib/wav-buffer-writer.js'; |
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import readWavBuffer from './lib/wav-buffer-reader.js'; |
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/** |
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* Class representing a wav file. |
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* @ignore |
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*/ |
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export default class WaveFile { |
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/** |
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* @param {?Uint8Array} bytes A wave file buffer. |
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* @throws {Error} If no 'RIFF' chunk is found. |
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* @throws {Error} If no 'fmt ' chunk is found. |
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* @throws {Error} If no 'data' chunk is found. |
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*/ |
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constructor(bytes=null) { |
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/** |
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* The container identifier. |
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* 'RIFF', 'RIFX' and 'RF64' are supported. |
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* @type {string} |
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*/ |
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this.container = ''; |
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/** |
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* @type {number} |
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*/ |
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this.chunkSize = 0; |
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/** |
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* The format. |
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* Always 'WAVE'. |
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* @type {string} |
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*/ |
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this.format = ''; |
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/** |
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* The data of the 'fmt' chunk. |
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* @type {!Object<string, *>} |
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*/ |
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this.fmt = { |
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/** @type {string} */ |
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chunkId: '', |
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/** @type {number} */ |
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chunkSize: 0, |
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/** @type {number} */ |
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audioFormat: 0, |
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/** @type {number} */ |
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numChannels: 0, |
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/** @type {number} */ |
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sampleRate: 0, |
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/** @type {number} */ |
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byteRate: 0, |
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/** @type {number} */ |
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blockAlign: 0, |
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/** @type {number} */ |
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bitsPerSample: 0, |
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/** @type {number} */ |
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cbSize: 0, |
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/** @type {number} */ |
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validBitsPerSample: 0, |
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/** @type {number} */ |
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dwChannelMask: 0, |
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/** |
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* 4 32-bit values representing a 128-bit ID |
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* @type {!Array<number>} |
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*/ |
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subformat: [] |
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}; |
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/** |
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* The data of the 'fact' chunk. |
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* @type {!Object<string, *>} |
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*/ |
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this.fact = { |
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/** @type {string} */ |
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chunkId: '', |
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/** @type {number} */ |
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chunkSize: 0, |
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/** @type {number} */ |
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dwSampleLength: 0 |
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}; |
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/** |
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* The data of the 'cue ' chunk. |
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* @type {!Object<string, *>} |
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*/ |
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this.cue = { |
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/** @type {string} */ |
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chunkId: '', |
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/** @type {number} */ |
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chunkSize: 0, |
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/** @type {number} */ |
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dwCuePoints: 0, |
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/** @type {!Array<!Object>} */ |
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points: [], |
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}; |
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/** |
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* The data of the 'smpl' chunk. |
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* @type {!Object<string, *>} |
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*/ |
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this.smpl = { |
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/** @type {string} */ |
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chunkId: '', |
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/** @type {number} */ |
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chunkSize: 0, |
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/** @type {number} */ |
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dwManufacturer: 0, |
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/** @type {number} */ |
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dwProduct: 0, |
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/** @type {number} */ |
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dwSamplePeriod: 0, |
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/** @type {number} */ |
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dwMIDIUnityNote: 0, |
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/** @type {number} */ |
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dwMIDIPitchFraction: 0, |
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/** @type {number} */ |
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dwSMPTEFormat: 0, |
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/** @type {number} */ |
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dwSMPTEOffset: 0, |
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/** @type {number} */ |
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dwNumSampleLoops: 0, |
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/** @type {number} */ |
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dwSamplerData: 0, |
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/** @type {!Array<!Object>} */ |
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loops: [] |
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}; |
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/** |
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* The data of the 'bext' chunk. |
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* @type {!Object<string, *>} |
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*/ |
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this.bext = { |
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/** @type {string} */ |
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chunkId: '', |
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/** @type {number} */ |
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chunkSize: 0, |
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/** @type {string} */ |
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description: '', //256 |
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/** @type {string} */ |
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originator: '', //32 |
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/** @type {string} */ |
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originatorReference: '', //32 |
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/** @type {string} */ |
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originationDate: '', //10 |
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/** @type {string} */ |
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originationTime: '', //8 |
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/** |
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* 2 32-bit values, timeReference high and low |
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* @type {!Array<number>} |
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*/ |
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timeReference: [0, 0], |
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/** @type {number} */ |
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version: 0, //WORD |
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/** @type {string} */ |
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UMID: '', // 64 chars |
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/** @type {number} */ |
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loudnessValue: 0, //WORD |
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/** @type {number} */ |
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loudnessRange: 0, //WORD |
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/** @type {number} */ |
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maxTruePeakLevel: 0, //WORD |
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/** @type {number} */ |
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maxMomentaryLoudness: 0, //WORD |
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/** @type {number} */ |
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maxShortTermLoudness: 0, //WORD |
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/** @type {string} */ |
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reserved: '', //180 |
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/** @type {string} */ |
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codingHistory: '' // string, unlimited |
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}; |
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/** |
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* The data of the 'ds64' chunk. |
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* Used only with RF64 files. |
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* @type {!Object<string, *>} |
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*/ |
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this.ds64 = { |
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/** @type {string} */ |
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chunkId: '', |
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/** @type {number} */ |
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chunkSize: 0, |
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/** @type {number} */ |
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riffSizeHigh: 0, // DWORD |
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/** @type {number} */ |
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riffSizeLow: 0, // DWORD |
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/** @type {number} */ |
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dataSizeHigh: 0, // DWORD |
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/** @type {number} */ |
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dataSizeLow: 0, // DWORD |
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/** @type {number} */ |
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originationTime: 0, // DWORD |
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/** @type {number} */ |
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sampleCountHigh: 0, // DWORD |
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/** @type {number} */ |
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sampleCountLow: 0 // DWORD |
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/** @type {number} */ |
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//'tableLength': 0, // DWORD |
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/** @type {!Array<number>} */ |
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//'table': [] |
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}; |
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/** |
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* The data of the 'data' chunk. |
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* @type {!Object<string, *>} |
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*/ |
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this.data = { |
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/** @type {string} */ |
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chunkId: '', |
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/** @type {number} */ |
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chunkSize: 0, |
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/** @type {!Uint8Array} */ |
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samples: new Uint8Array(0) |
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}; |
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/** |
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* The data of the 'LIST' chunks. |
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* Each item in this list look like this: |
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* { |
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* chunkId: '', |
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* chunkSize: 0, |
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* format: '', |
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* subChunks: [] |
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* } |
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* @type {!Array<!Object>} |
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*/ |
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this.LIST = []; |
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/** |
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* The data of the 'junk' chunk. |
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* @type {!Object<string, *>} |
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*/ |
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this.junk = { |
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/** @type {string} */ |
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chunkId: '', |
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/** @type {number} */ |
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chunkSize: 0, |
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/** @type {!Array<number>} */ |
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chunkData: [] |
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}; |
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/** |
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* The bit depth code according to the samples. |
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* @type {string} |
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*/ |
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this.bitDepth = '0'; |
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/** |
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* @type {!Object} |
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* @private |
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*/ |
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this.dataType = {}; |
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this.io = new BufferIO(); |
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// Load a file from the buffer if one was passed |
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// when creating the object |
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if(bytes) { |
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this.fromBuffer(bytes); |
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} |
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} |
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/** |
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* Set up the WaveFile object based on the arguments passed. |
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* @param {number} numChannels The number of channels |
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* (Integer numbers: 1 for mono, 2 stereo and so on). |
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* @param {number} sampleRate The sample rate. |
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* Integer numbers like 8000, 44100, 48000, 96000, 192000. |
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* @param {string} bitDepthCode The audio bit depth code. |
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* One of '4', '8', '8a', '8m', '16', '24', '32', '32f', '64' |
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* or any value between '8' and '32' (like '12'). |
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* @param {!Array<number>|!Array<!Array<number>>|!ArrayBufferView} samples |
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* The samples. Must be in the correct range according to the bit depth. |
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* @param {?Object} options Optional. Used to force the container |
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* as RIFX with {'container': 'RIFX'} |
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* @throws {Error} If any argument does not meet the criteria. |
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*/ |
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fromScratch(numChannels, sampleRate, bitDepthCode, samples, options={}) { |
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if (!options.container) { |
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options.container = 'RIFF'; |
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} |
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this.container = options.container; |
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this.bitDepth = bitDepthCode; |
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samples = this.interleave_(samples); |
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this.updateDataType_(); |
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/** @type {number} */ |
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let numBytes = this.dataType.bits / 8; |
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this.data.samples = new Uint8Array(samples.length * numBytes); |
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packArrayTo(samples, this.dataType, this.data.samples); |
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/** @type {!Object} */ |
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315
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let header = wavHeader( |
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bitDepthCode, numChannels, sampleRate, |
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numBytes, this.data.samples.length, options); |
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318
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this.clearHeader_(); |
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this.chunkSize = header.chunkSize; |
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this.format = header.format; |
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this.fmt = header.fmt; |
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if (header.fact) { |
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this.fact = header.fact; |
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324
|
|
|
} |
|
325
|
|
|
this.data.chunkId = 'data'; |
|
326
|
|
|
this.data.chunkSize = this.data.samples.length; |
|
327
|
|
|
validateHeader_(this); |
|
328
|
|
|
} |
|
329
|
|
|
|
|
330
|
|
|
/** |
|
331
|
|
|
* Set up the WaveFile object from a byte buffer. |
|
332
|
|
|
* @param {!Uint8Array} bytes The buffer. |
|
333
|
|
|
* @param {boolean=} samples True if the samples should be loaded. |
|
334
|
|
|
* @throws {Error} If container is not RIFF, RIFX or RF64. |
|
335
|
|
|
* @throws {Error} If no 'fmt ' chunk is found. |
|
336
|
|
|
* @throws {Error} If no 'data' chunk is found. |
|
337
|
|
|
*/ |
|
338
|
|
|
fromBuffer(bytes, samples=true) { |
|
339
|
|
|
this.clearHeader_(); |
|
340
|
|
|
readWavBuffer(bytes, samples, this); |
|
341
|
|
|
this.updateDataType_(); |
|
342
|
|
|
} |
|
343
|
|
|
|
|
344
|
|
|
/** |
|
345
|
|
|
* Return a byte buffer representig the WaveFile object as a .wav file. |
|
346
|
|
|
* The return value of this method can be written straight to disk. |
|
347
|
|
|
* @return {!Uint8Array} A .wav file. |
|
348
|
|
|
* @throws {Error} If any property of the object appears invalid. |
|
349
|
|
|
*/ |
|
350
|
|
|
toBuffer() { |
|
351
|
|
|
validateHeader_(this); |
|
352
|
|
|
return writeWavBuffer(this); |
|
353
|
|
|
} |
|
354
|
|
|
|
|
355
|
|
|
/** |
|
356
|
|
|
* Use a .wav file encoded as a base64 string to load the WaveFile object. |
|
357
|
|
|
* @param {string} base64String A .wav file as a base64 string. |
|
358
|
|
|
* @throws {Error} If any property of the object appears invalid. |
|
359
|
|
|
*/ |
|
360
|
|
|
fromBase64(base64String) { |
|
361
|
|
|
this.fromBuffer(new Uint8Array(decode(base64String))); |
|
362
|
|
|
} |
|
363
|
|
|
|
|
364
|
|
|
/** |
|
365
|
|
|
* Return a base64 string representig the WaveFile object as a .wav file. |
|
366
|
|
|
* @return {string} A .wav file as a base64 string. |
|
367
|
|
|
* @throws {Error} If any property of the object appears invalid. |
|
368
|
|
|
*/ |
|
369
|
|
|
toBase64() { |
|
370
|
|
|
/** @type {!Uint8Array} */ |
|
371
|
|
|
let buffer = this.toBuffer(); |
|
372
|
|
|
return encode(buffer, 0, buffer.length); |
|
373
|
|
|
} |
|
374
|
|
|
|
|
375
|
|
|
/** |
|
376
|
|
|
* Return a DataURI string representig the WaveFile object as a .wav file. |
|
377
|
|
|
* The return of this method can be used to load the audio in browsers. |
|
378
|
|
|
* @return {string} A .wav file as a DataURI. |
|
379
|
|
|
* @throws {Error} If any property of the object appears invalid. |
|
380
|
|
|
*/ |
|
381
|
|
|
toDataURI() { |
|
382
|
|
|
return 'data:audio/wav;base64,' + this.toBase64(); |
|
383
|
|
|
} |
|
384
|
|
|
|
|
385
|
|
|
/** |
|
386
|
|
|
* Use a .wav file encoded as a DataURI to load the WaveFile object. |
|
387
|
|
|
* @param {string} dataURI A .wav file as DataURI. |
|
388
|
|
|
* @throws {Error} If any property of the object appears invalid. |
|
389
|
|
|
*/ |
|
390
|
|
|
fromDataURI(dataURI) { |
|
391
|
|
|
this.fromBase64(dataURI.replace('data:audio/wav;base64,', '')); |
|
392
|
|
|
} |
|
393
|
|
|
|
|
394
|
|
|
/** |
|
395
|
|
|
* Force a file as RIFF. |
|
396
|
|
|
*/ |
|
397
|
|
|
toRIFF() { |
|
398
|
|
|
if (this.container == 'RF64') { |
|
399
|
|
|
this.fromScratch( |
|
400
|
|
|
this.fmt.numChannels, |
|
401
|
|
|
this.fmt.sampleRate, |
|
402
|
|
|
this.bitDepth, |
|
403
|
|
|
unpackArray(this.data.samples, this.dataType)); |
|
404
|
|
|
} else { |
|
405
|
|
|
this.dataType.be = true; |
|
406
|
|
|
this.fromScratch( |
|
407
|
|
|
this.fmt.numChannels, |
|
408
|
|
|
this.fmt.sampleRate, |
|
409
|
|
|
this.bitDepth, |
|
410
|
|
|
unpackArray(this.data.samples, this.dataType)); |
|
411
|
|
|
} |
|
412
|
|
|
} |
|
413
|
|
|
|
|
414
|
|
|
/** |
|
415
|
|
|
* Force a file as RIFX. |
|
416
|
|
|
*/ |
|
417
|
|
|
toRIFX() { |
|
418
|
|
|
if (this.container == 'RF64') { |
|
419
|
|
|
this.fromScratch( |
|
420
|
|
|
this.fmt.numChannels, |
|
421
|
|
|
this.fmt.sampleRate, |
|
422
|
|
|
this.bitDepth, |
|
423
|
|
|
unpackArray(this.data.samples, this.dataType), |
|
424
|
|
|
{container: 'RIFX'}); |
|
425
|
|
|
} else { |
|
426
|
|
|
this.fromScratch( |
|
427
|
|
|
this.fmt.numChannels, |
|
428
|
|
|
this.fmt.sampleRate, |
|
429
|
|
|
this.bitDepth, |
|
430
|
|
|
unpackArray(this.data.samples, this.dataType), |
|
431
|
|
|
{container: 'RIFX'}); |
|
432
|
|
|
} |
|
433
|
|
|
} |
|
434
|
|
|
|
|
435
|
|
|
/** |
|
436
|
|
|
* Change the bit depth of the samples. |
|
437
|
|
|
* @param {string} newBitDepth The new bit depth of the samples. |
|
438
|
|
|
* One of '8' ... '32' (integers), '32f' or '64' (floats) |
|
439
|
|
|
* @param {boolean} changeResolution A boolean indicating if the |
|
440
|
|
|
* resolution of samples should be actually changed or not. |
|
441
|
|
|
* @throws {Error} If the bit depth is not valid. |
|
442
|
|
|
*/ |
|
443
|
|
|
toBitDepth(newBitDepth, changeResolution=true) { |
|
444
|
|
|
/** @type {string} */ |
|
445
|
|
|
let toBitDepth = newBitDepth; |
|
446
|
|
|
/** @type {string} */ |
|
447
|
|
|
let thisBitDepth = this.bitDepth; |
|
448
|
|
|
if (!changeResolution) { |
|
449
|
|
|
if (newBitDepth != '32f') { |
|
450
|
|
|
toBitDepth = this.dataType.bits.toString(); |
|
451
|
|
|
} |
|
452
|
|
|
thisBitDepth = this.dataType.bits; |
|
453
|
|
|
} |
|
454
|
|
|
this.assureUncompressed_(); |
|
455
|
|
|
/** @type {number} */ |
|
456
|
|
|
let sampleCount = this.data.samples.length / (this.dataType.bits / 8); |
|
457
|
|
|
/** @type {!Float64Array} */ |
|
458
|
|
|
let typedSamplesInput = new Float64Array(sampleCount + 1); |
|
459
|
|
|
/** @type {!Float64Array} */ |
|
460
|
|
|
let typedSamplesOutput = new Float64Array(sampleCount + 1); |
|
461
|
|
|
unpackArrayTo(this.data.samples, this.dataType, typedSamplesInput); |
|
462
|
|
|
bitDepthLib( |
|
463
|
|
|
typedSamplesInput, thisBitDepth, toBitDepth, typedSamplesOutput); |
|
464
|
|
|
this.fromScratch( |
|
465
|
|
|
this.fmt.numChannels, |
|
466
|
|
|
this.fmt.sampleRate, |
|
467
|
|
|
newBitDepth, |
|
468
|
|
|
typedSamplesOutput, |
|
469
|
|
|
{container: this.correctContainer_()}); |
|
470
|
|
|
} |
|
471
|
|
|
|
|
472
|
|
|
/** |
|
473
|
|
|
* Encode a 16-bit wave file as 4-bit IMA ADPCM. |
|
474
|
|
|
* @throws {Error} If sample rate is not 8000. |
|
475
|
|
|
* @throws {Error} If number of channels is not 1. |
|
476
|
|
|
*/ |
|
477
|
|
|
toIMAADPCM() { |
|
478
|
|
|
if (this.fmt.sampleRate !== 8000) { |
|
479
|
|
|
throw new Error( |
|
480
|
|
|
'Only 8000 Hz files can be compressed as IMA-ADPCM.'); |
|
481
|
|
|
} else if(this.fmt.numChannels !== 1) { |
|
482
|
|
|
throw new Error( |
|
483
|
|
|
'Only mono files can be compressed as IMA-ADPCM.'); |
|
484
|
|
|
} else { |
|
485
|
|
|
this.assure16Bit_(); |
|
486
|
|
|
let output = new Int16Array(this.data.samples.length / 2); |
|
487
|
|
|
unpackArrayTo(this.data.samples, this.dataType, output); |
|
488
|
|
|
this.fromScratch( |
|
489
|
|
|
this.fmt.numChannels, |
|
490
|
|
|
this.fmt.sampleRate, |
|
491
|
|
|
'4', |
|
492
|
|
|
imaadpcm.encode(output), |
|
493
|
|
|
{container: this.correctContainer_()}); |
|
494
|
|
|
} |
|
495
|
|
|
} |
|
496
|
|
|
|
|
497
|
|
|
/** |
|
498
|
|
|
* Decode a 4-bit IMA ADPCM wave file as a 16-bit wave file. |
|
499
|
|
|
* @param {string} bitDepthCode The new bit depth of the samples. |
|
500
|
|
|
* One of '8' ... '32' (integers), '32f' or '64' (floats). |
|
501
|
|
|
* Optional. Default is 16. |
|
502
|
|
|
*/ |
|
503
|
|
|
fromIMAADPCM(bitDepthCode='16') { |
|
504
|
|
|
this.fromScratch( |
|
505
|
|
|
this.fmt.numChannels, |
|
506
|
|
|
this.fmt.sampleRate, |
|
507
|
|
|
'16', |
|
508
|
|
|
imaadpcm.decode(this.data.samples, this.fmt.blockAlign), |
|
509
|
|
|
{container: this.correctContainer_()}); |
|
510
|
|
|
if (bitDepthCode != '16') { |
|
511
|
|
|
this.toBitDepth(bitDepthCode); |
|
512
|
|
|
} |
|
513
|
|
|
} |
|
514
|
|
|
|
|
515
|
|
|
/** |
|
516
|
|
|
* Encode a 16-bit wave file as 8-bit A-Law. |
|
517
|
|
|
*/ |
|
518
|
|
|
toALaw() { |
|
519
|
|
|
this.assure16Bit_(); |
|
520
|
|
|
let output = new Int16Array(this.data.samples.length / 2); |
|
521
|
|
|
unpackArrayTo(this.data.samples, this.dataType, output); |
|
522
|
|
|
this.fromScratch( |
|
523
|
|
|
this.fmt.numChannels, |
|
524
|
|
|
this.fmt.sampleRate, |
|
525
|
|
|
'8a', |
|
526
|
|
|
alawmulaw.alaw.encode(output), |
|
527
|
|
|
{container: this.correctContainer_()}); |
|
528
|
|
|
} |
|
529
|
|
|
|
|
530
|
|
|
/** |
|
531
|
|
|
* Decode a 8-bit A-Law wave file into a 16-bit wave file. |
|
532
|
|
|
* @param {string} bitDepthCode The new bit depth of the samples. |
|
533
|
|
|
* One of '8' ... '32' (integers), '32f' or '64' (floats). |
|
534
|
|
|
* Optional. Default is 16. |
|
535
|
|
|
*/ |
|
536
|
|
|
fromALaw(bitDepthCode='16') { |
|
537
|
|
|
this.fromScratch( |
|
538
|
|
|
this.fmt.numChannels, |
|
539
|
|
|
this.fmt.sampleRate, |
|
540
|
|
|
'16', |
|
541
|
|
|
alawmulaw.alaw.decode(this.data.samples), |
|
542
|
|
|
{container: this.correctContainer_()}); |
|
543
|
|
|
if (bitDepthCode != '16') { |
|
544
|
|
|
this.toBitDepth(bitDepthCode); |
|
545
|
|
|
} |
|
546
|
|
|
} |
|
547
|
|
|
|
|
548
|
|
|
/** |
|
549
|
|
|
* Encode 16-bit wave file as 8-bit mu-Law. |
|
550
|
|
|
*/ |
|
551
|
|
|
toMuLaw() { |
|
552
|
|
|
this.assure16Bit_(); |
|
553
|
|
|
let output = new Int16Array(this.data.samples.length / 2); |
|
554
|
|
|
unpackArrayTo(this.data.samples, this.dataType, output); |
|
555
|
|
|
this.fromScratch( |
|
556
|
|
|
this.fmt.numChannels, |
|
557
|
|
|
this.fmt.sampleRate, |
|
558
|
|
|
'8m', |
|
559
|
|
|
alawmulaw.mulaw.encode(output), |
|
560
|
|
|
{container: this.correctContainer_()}); |
|
561
|
|
|
} |
|
562
|
|
|
|
|
563
|
|
|
/** |
|
564
|
|
|
* Decode a 8-bit mu-Law wave file into a 16-bit wave file. |
|
565
|
|
|
* @param {string} bitDepthCode The new bit depth of the samples. |
|
566
|
|
|
* One of '8' ... '32' (integers), '32f' or '64' (floats). |
|
567
|
|
|
* Optional. Default is 16. |
|
568
|
|
|
*/ |
|
569
|
|
|
fromMuLaw(bitDepthCode='16') { |
|
570
|
|
|
this.fromScratch( |
|
571
|
|
|
this.fmt.numChannels, |
|
572
|
|
|
this.fmt.sampleRate, |
|
573
|
|
|
'16', |
|
574
|
|
|
alawmulaw.mulaw.decode(this.data.samples), |
|
575
|
|
|
{container: this.correctContainer_()}); |
|
576
|
|
|
if (bitDepthCode != '16') { |
|
577
|
|
|
this.toBitDepth(bitDepthCode); |
|
578
|
|
|
} |
|
579
|
|
|
} |
|
580
|
|
|
|
|
581
|
|
|
/** |
|
582
|
|
|
* Write a RIFF tag in the INFO chunk. If the tag do not exist, |
|
583
|
|
|
* then it is created. It if exists, it is overwritten. |
|
584
|
|
|
* @param {string} tag The tag name. |
|
585
|
|
|
* @param {string} value The tag value. |
|
586
|
|
|
* @throws {Error} If the tag name is not valid. |
|
587
|
|
|
*/ |
|
588
|
|
|
setTag(tag, value) { |
|
589
|
|
|
tag = this.fixTagName_(tag); |
|
590
|
|
|
/** @type {!Object} */ |
|
591
|
|
|
let index = this.getTagIndex_(tag); |
|
592
|
|
|
if (index.TAG !== null) { |
|
593
|
|
|
this.LIST[index.LIST].subChunks[index.TAG].chunkSize = |
|
594
|
|
|
value.length + 1; |
|
595
|
|
|
this.LIST[index.LIST].subChunks[index.TAG].value = value; |
|
596
|
|
|
} else if (index.LIST !== null) { |
|
597
|
|
|
this.LIST[index.LIST].subChunks.push({ |
|
598
|
|
|
chunkId: tag, |
|
599
|
|
|
chunkSize: value.length + 1, |
|
600
|
|
|
value: value}); |
|
601
|
|
|
} else { |
|
602
|
|
|
this.LIST.push({ |
|
603
|
|
|
chunkId: 'LIST', |
|
604
|
|
|
chunkSize: 8 + value.length + 1, |
|
605
|
|
|
format: 'INFO', |
|
606
|
|
|
subChunks: []}); |
|
607
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push({ |
|
608
|
|
|
chunkId: tag, |
|
609
|
|
|
chunkSize: value.length + 1, |
|
610
|
|
|
value: value}); |
|
611
|
|
|
} |
|
612
|
|
|
} |
|
613
|
|
|
|
|
614
|
|
|
/** |
|
615
|
|
|
* Return the value of a RIFF tag in the INFO chunk. |
|
616
|
|
|
* @param {string} tag The tag name. |
|
617
|
|
|
* @return {?string} The value if the tag is found, null otherwise. |
|
618
|
|
|
*/ |
|
619
|
|
|
getTag(tag) { |
|
620
|
|
|
/** @type {!Object} */ |
|
621
|
|
|
let index = this.getTagIndex_(tag); |
|
622
|
|
|
if (index.TAG !== null) { |
|
623
|
|
|
return this.LIST[index.LIST].subChunks[index.TAG].value; |
|
624
|
|
|
} |
|
625
|
|
|
return null; |
|
626
|
|
|
} |
|
627
|
|
|
|
|
628
|
|
|
/** |
|
629
|
|
|
* Remove a RIFF tag in the INFO chunk. |
|
630
|
|
|
* @param {string} tag The tag name. |
|
631
|
|
|
* @return {boolean} True if a tag was deleted. |
|
632
|
|
|
*/ |
|
633
|
|
|
deleteTag(tag) { |
|
634
|
|
|
/** @type {!Object} */ |
|
635
|
|
|
let index = this.getTagIndex_(tag); |
|
636
|
|
|
if (index.TAG !== null) { |
|
637
|
|
|
this.LIST[index.LIST].subChunks.splice(index.TAG, 1); |
|
638
|
|
|
return true; |
|
639
|
|
|
} |
|
640
|
|
|
return false; |
|
641
|
|
|
} |
|
642
|
|
|
|
|
643
|
|
|
/** |
|
644
|
|
|
* Create a cue point in the wave file. |
|
645
|
|
|
* @param {number} position The cue point position in milliseconds. |
|
646
|
|
|
* @param {string} labl The LIST adtl labl text of the marker. Optional. |
|
647
|
|
|
*/ |
|
648
|
|
|
setCuePoint(position, labl='') { |
|
649
|
|
|
this.cue.chunkId = 'cue '; |
|
650
|
|
|
position = (position * this.fmt.sampleRate) / 1000; |
|
651
|
|
|
/** @type {!Array<!Object>} */ |
|
652
|
|
|
let existingPoints = this.getCuePoints_(); |
|
653
|
|
|
this.clearLISTadtl_(); |
|
654
|
|
|
/** @type {number} */ |
|
655
|
|
|
let len = this.cue.points.length; |
|
656
|
|
|
this.cue.points = []; |
|
657
|
|
|
/** @type {boolean} */ |
|
658
|
|
|
let hasSet = false; |
|
659
|
|
|
if (len === 0) { |
|
660
|
|
|
this.setCuePoint_(position, 1, labl); |
|
661
|
|
|
} else { |
|
662
|
|
|
for (let i=0; i<len; i++) { |
|
663
|
|
|
if (existingPoints[i].dwPosition > position && !hasSet) { |
|
664
|
|
|
this.setCuePoint_(position, i + 1, labl); |
|
665
|
|
|
this.setCuePoint_( |
|
666
|
|
|
existingPoints[i].dwPosition, |
|
667
|
|
|
i + 2, |
|
668
|
|
|
existingPoints[i].label); |
|
669
|
|
|
hasSet = true; |
|
670
|
|
|
} else { |
|
671
|
|
|
this.setCuePoint_( |
|
672
|
|
|
existingPoints[i].dwPosition, |
|
673
|
|
|
i + 1, |
|
674
|
|
|
existingPoints[i].label); |
|
675
|
|
|
} |
|
676
|
|
|
} |
|
677
|
|
|
if (!hasSet) { |
|
678
|
|
|
this.setCuePoint_(position, this.cue.points.length + 1, labl); |
|
679
|
|
|
} |
|
680
|
|
|
} |
|
681
|
|
|
this.cue.dwCuePoints = this.cue.points.length; |
|
682
|
|
|
} |
|
683
|
|
|
|
|
684
|
|
|
/** |
|
685
|
|
|
* Remove a cue point from a wave file. |
|
686
|
|
|
* @param {number} index the index of the point. First is 1, |
|
687
|
|
|
* second is 2, and so on. |
|
688
|
|
|
*/ |
|
689
|
|
|
deleteCuePoint(index) { |
|
690
|
|
|
this.cue.chunkId = 'cue '; |
|
691
|
|
|
/** @type {!Array<!Object>} */ |
|
692
|
|
|
let existingPoints = this.getCuePoints_(); |
|
693
|
|
|
this.clearLISTadtl_(); |
|
694
|
|
|
/** @type {number} */ |
|
695
|
|
|
let len = this.cue.points.length; |
|
696
|
|
|
this.cue.points = []; |
|
697
|
|
|
for (let i=0; i<len; i++) { |
|
698
|
|
|
if (i + 1 !== index) { |
|
699
|
|
|
this.setCuePoint_( |
|
700
|
|
|
existingPoints[i].dwPosition, |
|
701
|
|
|
i + 1, |
|
702
|
|
|
existingPoints[i].label); |
|
703
|
|
|
} |
|
704
|
|
|
} |
|
705
|
|
|
this.cue.dwCuePoints = this.cue.points.length; |
|
706
|
|
|
if (this.cue.dwCuePoints) { |
|
707
|
|
|
this.cue.chunkId = 'cue '; |
|
708
|
|
|
} else { |
|
709
|
|
|
this.cue.chunkId = ''; |
|
710
|
|
|
this.clearLISTadtl_(); |
|
711
|
|
|
} |
|
712
|
|
|
} |
|
713
|
|
|
|
|
714
|
|
|
/** |
|
715
|
|
|
* Update the label of a cue point. |
|
716
|
|
|
* @param {number} pointIndex The ID of the cue point. |
|
717
|
|
|
* @param {string} label The new text for the label. |
|
718
|
|
|
*/ |
|
719
|
|
|
updateLabel(pointIndex, label) { |
|
720
|
|
|
/** @type {?number} */ |
|
721
|
|
|
let adtlIndex = this.getAdtlChunk_(); |
|
722
|
|
|
if (adtlIndex !== null) { |
|
723
|
|
|
for (let i=0; i<this.LIST[adtlIndex].subChunks.length; i++) { |
|
724
|
|
|
if (this.LIST[adtlIndex].subChunks[i].dwName == |
|
725
|
|
|
pointIndex) { |
|
726
|
|
|
this.LIST[adtlIndex].subChunks[i].value = label; |
|
727
|
|
|
} |
|
728
|
|
|
} |
|
729
|
|
|
} |
|
730
|
|
|
} |
|
731
|
|
|
|
|
732
|
|
|
/** |
|
733
|
|
|
* Push a new cue point in this.cue.points. |
|
734
|
|
|
* @param {number} position The position in milliseconds. |
|
735
|
|
|
* @param {number} dwName the dwName of the cue point |
|
736
|
|
|
* @private |
|
737
|
|
|
*/ |
|
738
|
|
|
setCuePoint_(position, dwName, label) { |
|
739
|
|
|
this.cue.points.push({ |
|
740
|
|
|
dwName: dwName, |
|
741
|
|
|
dwPosition: position, |
|
742
|
|
|
fccChunk: 'data', |
|
743
|
|
|
dwChunkStart: 0, |
|
744
|
|
|
dwBlockStart: 0, |
|
745
|
|
|
dwSampleOffset: position, |
|
746
|
|
|
}); |
|
747
|
|
|
this.setLabl_(dwName, label); |
|
748
|
|
|
} |
|
749
|
|
|
|
|
750
|
|
|
/** |
|
751
|
|
|
* Return an array with the position of all cue points in the file. |
|
752
|
|
|
* @return {!Array<!Object>} |
|
753
|
|
|
* @private |
|
754
|
|
|
*/ |
|
755
|
|
|
getCuePoints_() { |
|
756
|
|
|
/** @type {!Array<!Object>} */ |
|
757
|
|
|
let points = []; |
|
758
|
|
|
for (let i=0; i<this.cue.points.length; i++) { |
|
759
|
|
|
points.push({ |
|
760
|
|
|
dwPosition: this.cue.points[i].dwPosition, |
|
761
|
|
|
label: this.getLabelForCuePoint_( |
|
762
|
|
|
this.cue.points[i].dwName)}); |
|
763
|
|
|
} |
|
764
|
|
|
return points; |
|
765
|
|
|
} |
|
766
|
|
|
|
|
767
|
|
|
/** |
|
768
|
|
|
* Return the label of a cue point. |
|
769
|
|
|
* @param {number} pointDwName The ID of the cue point. |
|
770
|
|
|
* @return {string} |
|
771
|
|
|
* @private |
|
772
|
|
|
*/ |
|
773
|
|
|
getLabelForCuePoint_(pointDwName) { |
|
774
|
|
|
/** @type {?number} */ |
|
775
|
|
|
let adtlIndex = this.getAdtlChunk_(); |
|
776
|
|
|
if (adtlIndex !== null) { |
|
777
|
|
|
for (let i=0; i<this.LIST[adtlIndex].subChunks.length; i++) { |
|
778
|
|
|
if (this.LIST[adtlIndex].subChunks[i].dwName == |
|
779
|
|
|
pointDwName) { |
|
780
|
|
|
return this.LIST[adtlIndex].subChunks[i].value; |
|
781
|
|
|
} |
|
782
|
|
|
} |
|
783
|
|
|
} |
|
784
|
|
|
return ''; |
|
785
|
|
|
} |
|
786
|
|
|
|
|
787
|
|
|
/** |
|
788
|
|
|
* Clear any LIST chunk labeled as 'adtl'. |
|
789
|
|
|
* @private |
|
790
|
|
|
*/ |
|
791
|
|
|
clearLISTadtl_() { |
|
792
|
|
|
for (let i=0; i<this.LIST.length; i++) { |
|
793
|
|
|
if (this.LIST[i].format == 'adtl') { |
|
794
|
|
|
this.LIST.splice(i); |
|
795
|
|
|
} |
|
796
|
|
|
} |
|
797
|
|
|
} |
|
798
|
|
|
|
|
799
|
|
|
/** |
|
800
|
|
|
* Create a new 'labl' subchunk in a 'LIST' chunk of type 'adtl'. |
|
801
|
|
|
* @param {number} dwName The ID of the cue point. |
|
802
|
|
|
* @param {string} label The label for the cue point. |
|
803
|
|
|
* @private |
|
804
|
|
|
*/ |
|
805
|
|
|
setLabl_(dwName, label) { |
|
806
|
|
|
/** @type {?number} */ |
|
807
|
|
|
let adtlIndex = this.getAdtlChunk_(); |
|
808
|
|
|
if (adtlIndex === null) { |
|
809
|
|
|
this.LIST.push({ |
|
810
|
|
|
chunkId: 'LIST', |
|
811
|
|
|
chunkSize: 4, |
|
812
|
|
|
format: 'adtl', |
|
813
|
|
|
subChunks: []}); |
|
814
|
|
|
adtlIndex = this.LIST.length - 1; |
|
815
|
|
|
} |
|
816
|
|
|
this.setLabelText_(adtlIndex === null ? 0 : adtlIndex, dwName, label); |
|
817
|
|
|
} |
|
818
|
|
|
|
|
819
|
|
|
/** |
|
820
|
|
|
* Create a new 'labl' subchunk in a 'LIST' chunk of type 'adtl'. |
|
821
|
|
|
* @param {number} adtlIndex The index of the 'adtl' LIST in this.LIST. |
|
822
|
|
|
* @param {number} dwName The ID of the cue point. |
|
823
|
|
|
* @param {string} label The label for the cue point. |
|
824
|
|
|
* @private |
|
825
|
|
|
*/ |
|
826
|
|
|
setLabelText_(adtlIndex, dwName, label) { |
|
827
|
|
|
this.LIST[adtlIndex].subChunks.push({ |
|
828
|
|
|
chunkId: 'labl', |
|
829
|
|
|
chunkSize: label.length, |
|
830
|
|
|
dwName: dwName, |
|
831
|
|
|
value: label |
|
832
|
|
|
}); |
|
833
|
|
|
this.LIST[adtlIndex].chunkSize += label.length + 4 + 4 + 4 + 1; |
|
834
|
|
|
} |
|
835
|
|
|
|
|
836
|
|
|
/** |
|
837
|
|
|
* Return the index of the 'adtl' LIST in this.LIST. |
|
838
|
|
|
* @return {?number} |
|
839
|
|
|
* @private |
|
840
|
|
|
*/ |
|
841
|
|
|
getAdtlChunk_() { |
|
842
|
|
|
for (let i=0; i<this.LIST.length; i++) { |
|
843
|
|
|
if(this.LIST[i].format == 'adtl') { |
|
844
|
|
|
return i; |
|
845
|
|
|
} |
|
846
|
|
|
} |
|
847
|
|
|
return null; |
|
848
|
|
|
} |
|
849
|
|
|
|
|
850
|
|
|
/** |
|
851
|
|
|
* Return the index of a tag in a FILE chunk. |
|
852
|
|
|
* @param {string} tag The tag name. |
|
853
|
|
|
* @return {!Object<string, ?number>} |
|
854
|
|
|
* Object.LIST is the INFO index in LIST |
|
855
|
|
|
* Object.TAG is the tag index in the INFO |
|
856
|
|
|
* @private |
|
857
|
|
|
*/ |
|
858
|
|
|
getTagIndex_(tag) { |
|
859
|
|
|
/** @type {!Object<string, ?number>} */ |
|
860
|
|
|
let index = {LIST: null, TAG: null}; |
|
861
|
|
|
for (let i=0; i<this.LIST.length; i++) { |
|
862
|
|
|
if (this.LIST[i].format == 'INFO') { |
|
863
|
|
|
index.LIST = i; |
|
864
|
|
|
for (let j=0; j<this.LIST[i].subChunks.length; j++) { |
|
865
|
|
|
if (this.LIST[i].subChunks[j].chunkId == tag) { |
|
866
|
|
|
index.TAG = j; |
|
867
|
|
|
break; |
|
868
|
|
|
} |
|
869
|
|
|
} |
|
870
|
|
|
break; |
|
871
|
|
|
} |
|
872
|
|
|
} |
|
873
|
|
|
return index; |
|
874
|
|
|
} |
|
875
|
|
|
|
|
876
|
|
|
/** |
|
877
|
|
|
* Fix a RIFF tag format if possible, throw an error otherwise. |
|
878
|
|
|
* @param {string} tag The tag name. |
|
879
|
|
|
* @return {string} The tag name in proper fourCC format. |
|
880
|
|
|
* @private |
|
881
|
|
|
*/ |
|
882
|
|
|
fixTagName_(tag) { |
|
883
|
|
|
if (tag.constructor !== String) { |
|
884
|
|
|
throw new Error('Invalid tag name.'); |
|
885
|
|
|
} else if(tag.length < 4) { |
|
886
|
|
|
for (let i=0; i<4-tag.length; i++) { |
|
887
|
|
|
tag += ' '; |
|
888
|
|
|
} |
|
889
|
|
|
} |
|
890
|
|
|
return tag; |
|
891
|
|
|
} |
|
892
|
|
|
|
|
893
|
|
|
/** |
|
894
|
|
|
* Reset attributes that should emptied when a file is |
|
895
|
|
|
* created with the fromScratch() or fromBuffer() methods. |
|
896
|
|
|
* @private |
|
897
|
|
|
*/ |
|
898
|
|
|
clearHeader_() { |
|
899
|
|
|
this.fmt.cbSize = 0; |
|
900
|
|
|
this.fmt.validBitsPerSample = 0; |
|
901
|
|
|
this.fact.chunkId = ''; |
|
902
|
|
|
this.ds64.chunkId = ''; |
|
903
|
|
|
} |
|
904
|
|
|
|
|
905
|
|
|
/** |
|
906
|
|
|
* Make the file 16-bit if it is not. |
|
907
|
|
|
* @private |
|
908
|
|
|
*/ |
|
909
|
|
|
assure16Bit_() { |
|
910
|
|
|
this.assureUncompressed_(); |
|
911
|
|
|
if (this.bitDepth != '16') { |
|
912
|
|
|
this.toBitDepth('16'); |
|
913
|
|
|
} |
|
914
|
|
|
} |
|
915
|
|
|
|
|
916
|
|
|
/** |
|
917
|
|
|
* Uncompress the samples in case of a compressed file. |
|
918
|
|
|
* @private |
|
919
|
|
|
*/ |
|
920
|
|
|
assureUncompressed_() { |
|
921
|
|
|
if (this.bitDepth == '8a') { |
|
922
|
|
|
this.fromALaw(); |
|
923
|
|
|
} else if(this.bitDepth == '8m') { |
|
924
|
|
|
this.fromMuLaw(); |
|
925
|
|
|
} else if (this.bitDepth == '4') { |
|
926
|
|
|
this.fromIMAADPCM(); |
|
927
|
|
|
} |
|
928
|
|
|
} |
|
929
|
|
|
|
|
930
|
|
|
/** |
|
931
|
|
|
* Set up the WaveFile object from a byte buffer. |
|
932
|
|
|
* @param {!Array<number>|!Array<!Array<number>>|!ArrayBufferView} samples The samples. |
|
933
|
|
|
* @private |
|
934
|
|
|
*/ |
|
935
|
|
|
interleave_(samples) { |
|
936
|
|
|
if (samples.length > 0) { |
|
937
|
|
|
if (samples[0].constructor === Array) { |
|
938
|
|
|
/** @type {!Array<number>} */ |
|
939
|
|
|
let finalSamples = []; |
|
940
|
|
|
for (let i=0; i < samples[0].length; i++) { |
|
941
|
|
|
for (let j=0; j < samples.length; j++) { |
|
942
|
|
|
finalSamples.push(samples[j][i]); |
|
943
|
|
|
} |
|
944
|
|
|
} |
|
945
|
|
|
samples = finalSamples; |
|
946
|
|
|
} |
|
947
|
|
|
} |
|
948
|
|
|
return samples; |
|
949
|
|
|
} |
|
950
|
|
|
|
|
951
|
|
|
/** |
|
952
|
|
|
* Update the type definition used to read and write the samples. |
|
953
|
|
|
* @private |
|
954
|
|
|
*/ |
|
955
|
|
|
updateDataType_() { |
|
956
|
|
|
/** @type {!Object} */ |
|
957
|
|
|
this.dataType = { |
|
958
|
|
|
bits: ((parseInt(this.bitDepth, 10) - 1) | 7) + 1, |
|
959
|
|
|
float: this.bitDepth == '32f' || this.bitDepth == '64', |
|
960
|
|
|
signed: this.bitDepth != '8', |
|
961
|
|
|
be: this.container == 'RIFX' |
|
962
|
|
|
}; |
|
963
|
|
|
if (['4', '8a', '8m'].indexOf(this.bitDepth) > -1 ) { |
|
964
|
|
|
this.dataType.bits = 8; |
|
965
|
|
|
this.dataType.signed = false; |
|
966
|
|
|
} |
|
967
|
|
|
} |
|
968
|
|
|
|
|
969
|
|
|
/** |
|
970
|
|
|
* Return 'RIFF' if the container is 'RF64', the current container name |
|
971
|
|
|
* otherwise. Used to enforce 'RIFF' when RF64 is not allowed. |
|
972
|
|
|
* @return {string} |
|
973
|
|
|
* @private |
|
974
|
|
|
*/ |
|
975
|
|
|
correctContainer_() { |
|
976
|
|
|
return this.container == 'RF64' ? 'RIFF' : this.container; |
|
977
|
|
|
} |
|
978
|
|
|
} |
|
979
|
|
|
|
rochars /
wavefile
