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/* |
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* Copyright (c) 2017-2019 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 WaveFileParser class. |
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* @see https://github.com/rochars/wavefile |
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*/ |
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import RIFFFile from './riff-file'; |
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import writeString from './write-string'; |
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import validateNumChannels from './validate-num-channels'; |
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import validateSampleRate from './validate-sample-rate'; |
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import {packTo, packStringTo, packString, pack} from 'byte-data'; |
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/** |
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* A class to read and write wav files. |
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*/ |
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export default class WaveFileParser extends RIFFFile { |
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/** |
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* @param {?Uint8Array=} wavBuffer A wave file buffer. |
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* @throws {Error} If container is not RIFF, RIFX or RF64. |
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* @throws {Error} If format is not WAVE. |
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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(wavBuffer=null) { |
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super(); |
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/** |
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* Audio formats. |
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* Formats not listed here should be set to 65534, |
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* the code for WAVE_FORMAT_EXTENSIBLE |
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* @enum {number} |
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* @protected |
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*/ |
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this.WAV_AUDIO_FORMATS = { |
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'4': 17, |
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'8': 1, |
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'8a': 6, |
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'8m': 7, |
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'16': 1, |
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'24': 1, |
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'32': 1, |
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'32f': 3, |
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'64': 3 |
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}; |
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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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* @protected |
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*/ |
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this.dataType = {}; |
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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 (wavBuffer) { |
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this.fromBuffer(wavBuffer); |
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} |
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} |
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/** |
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* Set up the WaveFileParser object from a byte buffer. |
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* @param {!Uint8Array} wavBuffer The buffer. |
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* @param {boolean=} samples True if the samples should be loaded. |
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* @throws {Error} If container is not RIFF, RIFX or RF64. |
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* @throws {Error} If format is not WAVE. |
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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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fromBuffer(wavBuffer, samples=true) { |
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this.clearHeader(); |
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this.head_ = 0; |
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this.readRIFFChunk(wavBuffer); |
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if (this.format != 'WAVE') { |
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throw Error('Could not find the "WAVE" format identifier'); |
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} |
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this.setSignature(wavBuffer); |
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this.readDs64Chunk_(wavBuffer); |
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this.readFmtChunk_(wavBuffer); |
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this.readFactChunk_(wavBuffer); |
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this.readBextChunk_(wavBuffer); |
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this.readCueChunk_(wavBuffer); |
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this.readSmplChunk_(wavBuffer); |
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this.readDataChunk_(wavBuffer, samples); |
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this.readJunkChunk_(wavBuffer); |
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this.readLISTChunk_(wavBuffer); |
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this.bitDepthFromFmt_(); |
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this.updateDataType(); |
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} |
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/** |
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* Return a byte buffer representig the WaveFileParser object as a .wav file. |
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* The return value of this method can be written straight to disk. |
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* @return {!Uint8Array} A wav file. |
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* @throws {Error} If bit depth is invalid. |
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* @throws {Error} If the number of channels is invalid. |
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* @throws {Error} If the sample rate is invalid. |
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*/ |
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toBuffer() { |
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this.validateWavHeader(); |
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return this.writeWavBuffer_(); |
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} |
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/** |
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* Reset some attributes of the object. |
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* @protected |
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*/ |
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329
|
|
|
clearHeader() { |
|
330
|
|
|
this.fmt.cbSize = 0; |
|
331
|
|
|
this.fmt.validBitsPerSample = 0; |
|
332
|
|
|
this.fact.chunkId = ''; |
|
333
|
|
|
this.ds64.chunkId = ''; |
|
334
|
|
|
} |
|
335
|
|
|
|
|
336
|
|
|
/** |
|
337
|
|
|
* Validate the header of the file. |
|
338
|
|
|
* @throws {Error} If bit depth is invalid. |
|
339
|
|
|
* @throws {Error} If the number of channels is invalid. |
|
340
|
|
|
* @throws {Error} If the sample rate is invalid. |
|
341
|
|
|
* @protected |
|
342
|
|
|
*/ |
|
343
|
|
|
validateWavHeader() { |
|
344
|
|
|
this.validateBitDepth_(); |
|
345
|
|
|
if (!validateNumChannels(this.fmt.numChannels, this.fmt.bitsPerSample)) { |
|
346
|
|
|
throw new Error('Invalid number of channels.'); |
|
347
|
|
|
} |
|
348
|
|
|
if (!validateSampleRate( |
|
349
|
|
|
this.fmt.numChannels, this.fmt.bitsPerSample, this.fmt.sampleRate)) { |
|
350
|
|
|
throw new Error('Invalid sample rate.'); |
|
351
|
|
|
} |
|
352
|
|
|
} |
|
353
|
|
|
|
|
354
|
|
|
/** |
|
355
|
|
|
* Update the type definition used to read and write the samples. |
|
356
|
|
|
* @protected |
|
357
|
|
|
*/ |
|
358
|
|
|
updateDataType() { |
|
359
|
|
|
this.dataType = { |
|
360
|
|
|
bits: ((parseInt(this.bitDepth, 10) - 1) | 7) + 1, |
|
361
|
|
|
fp: this.bitDepth == '32f' || this.bitDepth == '64', |
|
362
|
|
|
signed: this.bitDepth != '8', |
|
363
|
|
|
be: this.container == 'RIFX' |
|
364
|
|
|
}; |
|
365
|
|
|
if (['4', '8a', '8m'].indexOf(this.bitDepth) > -1 ) { |
|
366
|
|
|
this.dataType.bits = 8; |
|
367
|
|
|
this.dataType.signed = false; |
|
368
|
|
|
} |
|
369
|
|
|
} |
|
370
|
|
|
|
|
371
|
|
|
/** |
|
372
|
|
|
* Set the string code of the bit depth based on the 'fmt ' chunk. |
|
373
|
|
|
* @private |
|
374
|
|
|
*/ |
|
375
|
|
|
bitDepthFromFmt_() { |
|
376
|
|
|
if (this.fmt.audioFormat === 3 && this.fmt.bitsPerSample === 32) { |
|
377
|
|
|
this.bitDepth = '32f'; |
|
378
|
|
|
} else if (this.fmt.audioFormat === 6) { |
|
379
|
|
|
this.bitDepth = '8a'; |
|
380
|
|
|
} else if (this.fmt.audioFormat === 7) { |
|
381
|
|
|
this.bitDepth = '8m'; |
|
382
|
|
|
} else { |
|
383
|
|
|
this.bitDepth = this.fmt.bitsPerSample.toString(); |
|
384
|
|
|
} |
|
385
|
|
|
} |
|
386
|
|
|
|
|
387
|
|
|
/** |
|
388
|
|
|
* Return a .wav file byte buffer with the data from the WaveFileParser object. |
|
389
|
|
|
* The return value of this method can be written straight to disk. |
|
390
|
|
|
* @return {!Uint8Array} The wav file bytes. |
|
391
|
|
|
* @private |
|
392
|
|
|
*/ |
|
393
|
|
|
writeWavBuffer_() { |
|
394
|
|
|
this.uInt16_.be = this.container === 'RIFX'; |
|
395
|
|
|
this.uInt32_.be = this.uInt16_.be; |
|
396
|
|
|
/** @type {!Array<!Array<number>>} */ |
|
397
|
|
|
let fileBody = [ |
|
398
|
|
|
this.getJunkBytes_(), |
|
399
|
|
|
this.getDs64Bytes_(), |
|
400
|
|
|
this.getBextBytes_(), |
|
401
|
|
|
this.getFmtBytes_(), |
|
402
|
|
|
this.getFactBytes_(), |
|
403
|
|
|
packString(this.data.chunkId), |
|
404
|
|
|
pack(this.data.samples.length, this.uInt32_), |
|
405
|
|
|
this.data.samples, |
|
406
|
|
|
this.getCueBytes_(), |
|
407
|
|
|
this.getSmplBytes_(), |
|
408
|
|
|
this.getLISTBytes_() |
|
409
|
|
|
]; |
|
410
|
|
|
/** @type {number} */ |
|
411
|
|
|
let fileBodyLength = 0; |
|
412
|
|
|
for (let i=0; i<fileBody.length; i++) { |
|
413
|
|
|
fileBodyLength += fileBody[i].length; |
|
414
|
|
|
} |
|
415
|
|
|
/** @type {!Uint8Array} */ |
|
416
|
|
|
let file = new Uint8Array(fileBodyLength + 12); |
|
417
|
|
|
/** @type {number} */ |
|
418
|
|
|
let index = 0; |
|
419
|
|
|
index = packStringTo(this.container, file, index); |
|
420
|
|
|
index = packTo(fileBodyLength + 4, this.uInt32_, file, index); |
|
421
|
|
|
index = packStringTo(this.format, file, index); |
|
422
|
|
|
for (let i=0; i<fileBody.length; i++) { |
|
423
|
|
|
file.set(fileBody[i], index); |
|
424
|
|
|
index += fileBody[i].length; |
|
425
|
|
|
} |
|
426
|
|
|
return file; |
|
427
|
|
|
} |
|
428
|
|
|
|
|
429
|
|
|
/** |
|
430
|
|
|
* Return the bytes of the 'bext' chunk. |
|
431
|
|
|
* @private |
|
432
|
|
|
*/ |
|
433
|
|
|
getBextBytes_() { |
|
434
|
|
|
/** @type {!Array<number>} */ |
|
435
|
|
|
let bytes = []; |
|
436
|
|
|
this.enforceBext_(); |
|
437
|
|
|
if (this.bext.chunkId) { |
|
438
|
|
|
this.bext.chunkSize = 602 + this.bext.codingHistory.length; |
|
439
|
|
|
bytes = bytes.concat( |
|
440
|
|
|
packString(this.bext.chunkId), |
|
441
|
|
|
pack(602 + this.bext.codingHistory.length, this.uInt32_), |
|
442
|
|
|
writeString(this.bext.description, 256), |
|
443
|
|
|
writeString(this.bext.originator, 32), |
|
444
|
|
|
writeString(this.bext.originatorReference, 32), |
|
445
|
|
|
writeString(this.bext.originationDate, 10), |
|
446
|
|
|
writeString(this.bext.originationTime, 8), |
|
447
|
|
|
pack(this.bext.timeReference[0], this.uInt32_), |
|
448
|
|
|
pack(this.bext.timeReference[1], this.uInt32_), |
|
449
|
|
|
pack(this.bext.version, this.uInt16_), |
|
450
|
|
|
writeString(this.bext.UMID, 64), |
|
451
|
|
|
pack(this.bext.loudnessValue, this.uInt16_), |
|
452
|
|
|
pack(this.bext.loudnessRange, this.uInt16_), |
|
453
|
|
|
pack(this.bext.maxTruePeakLevel, this.uInt16_), |
|
454
|
|
|
pack(this.bext.maxMomentaryLoudness, this.uInt16_), |
|
455
|
|
|
pack(this.bext.maxShortTermLoudness, this.uInt16_), |
|
456
|
|
|
writeString(this.bext.reserved, 180), |
|
457
|
|
|
writeString( |
|
458
|
|
|
this.bext.codingHistory, this.bext.codingHistory.length)); |
|
459
|
|
|
} |
|
460
|
|
|
return bytes; |
|
461
|
|
|
} |
|
462
|
|
|
|
|
463
|
|
|
/** |
|
464
|
|
|
* Make sure a 'bext' chunk is created if BWF data was created in a file. |
|
465
|
|
|
* @private |
|
466
|
|
|
*/ |
|
467
|
|
|
enforceBext_() { |
|
468
|
|
|
for (let prop in this.bext) { |
|
469
|
|
|
if (this.bext.hasOwnProperty(prop)) { |
|
470
|
|
|
if (this.bext[prop] && prop != 'timeReference') { |
|
471
|
|
|
this.bext.chunkId = 'bext'; |
|
472
|
|
|
break; |
|
473
|
|
|
} |
|
474
|
|
|
} |
|
475
|
|
|
} |
|
476
|
|
|
if (this.bext.timeReference[0] || this.bext.timeReference[1]) { |
|
477
|
|
|
this.bext.chunkId = 'bext'; |
|
478
|
|
|
} |
|
479
|
|
|
} |
|
480
|
|
|
|
|
481
|
|
|
/** |
|
482
|
|
|
* Return the bytes of the 'ds64' chunk. |
|
483
|
|
|
* @return {!Array<number>} The 'ds64' chunk bytes. |
|
484
|
|
|
* @private |
|
485
|
|
|
*/ |
|
486
|
|
|
getDs64Bytes_() { |
|
487
|
|
|
/** @type {!Array<number>} */ |
|
488
|
|
|
let bytes = []; |
|
489
|
|
|
if (this.ds64.chunkId) { |
|
490
|
|
|
bytes = bytes.concat( |
|
491
|
|
|
packString(this.ds64.chunkId), |
|
492
|
|
|
pack(this.ds64.chunkSize, this.uInt32_), |
|
493
|
|
|
pack(this.ds64.riffSizeHigh, this.uInt32_), |
|
494
|
|
|
pack(this.ds64.riffSizeLow, this.uInt32_), |
|
495
|
|
|
pack(this.ds64.dataSizeHigh, this.uInt32_), |
|
496
|
|
|
pack(this.ds64.dataSizeLow, this.uInt32_), |
|
497
|
|
|
pack(this.ds64.originationTime, this.uInt32_), |
|
498
|
|
|
pack(this.ds64.sampleCountHigh, this.uInt32_), |
|
499
|
|
|
pack(this.ds64.sampleCountLow, this.uInt32_)); |
|
500
|
|
|
} |
|
501
|
|
|
//if (this.ds64.tableLength) { |
|
502
|
|
|
// ds64Bytes = ds64Bytes.concat( |
|
503
|
|
|
// pack(this.ds64.tableLength, this.uInt32_), |
|
504
|
|
|
// this.ds64.table); |
|
505
|
|
|
//} |
|
506
|
|
|
return bytes; |
|
507
|
|
|
} |
|
508
|
|
|
|
|
509
|
|
|
/** |
|
510
|
|
|
* Return the bytes of the 'cue ' chunk. |
|
511
|
|
|
* @return {!Array<number>} The 'cue ' chunk bytes. |
|
512
|
|
|
* @private |
|
513
|
|
|
*/ |
|
514
|
|
|
getCueBytes_() { |
|
515
|
|
|
/** @type {!Array<number>} */ |
|
516
|
|
|
let bytes = []; |
|
517
|
|
|
if (this.cue.chunkId) { |
|
518
|
|
|
/** @type {!Array<number>} */ |
|
519
|
|
|
let cuePointsBytes = this.getCuePointsBytes_(); |
|
520
|
|
|
bytes = bytes.concat( |
|
521
|
|
|
packString(this.cue.chunkId), |
|
522
|
|
|
pack(cuePointsBytes.length + 4, this.uInt32_), |
|
523
|
|
|
pack(this.cue.dwCuePoints, this.uInt32_), |
|
524
|
|
|
cuePointsBytes); |
|
525
|
|
|
} |
|
526
|
|
|
return bytes; |
|
527
|
|
|
} |
|
528
|
|
|
|
|
529
|
|
|
/** |
|
530
|
|
|
* Return the bytes of the 'cue ' points. |
|
531
|
|
|
* @return {!Array<number>} The 'cue ' points as an array of bytes. |
|
532
|
|
|
* @private |
|
533
|
|
|
*/ |
|
534
|
|
|
getCuePointsBytes_() { |
|
535
|
|
|
/** @type {!Array<number>} */ |
|
536
|
|
|
let points = []; |
|
537
|
|
|
for (let i=0; i<this.cue.dwCuePoints; i++) { |
|
538
|
|
|
points = points.concat( |
|
539
|
|
|
pack(this.cue.points[i].dwName, this.uInt32_), |
|
540
|
|
|
pack(this.cue.points[i].dwPosition, this.uInt32_), |
|
541
|
|
|
packString(this.cue.points[i].fccChunk), |
|
542
|
|
|
pack(this.cue.points[i].dwChunkStart, this.uInt32_), |
|
543
|
|
|
pack(this.cue.points[i].dwBlockStart, this.uInt32_), |
|
544
|
|
|
pack(this.cue.points[i].dwSampleOffset, this.uInt32_)); |
|
545
|
|
|
} |
|
546
|
|
|
return points; |
|
547
|
|
|
} |
|
548
|
|
|
|
|
549
|
|
|
/** |
|
550
|
|
|
* Return the bytes of the 'smpl' chunk. |
|
551
|
|
|
* @return {!Array<number>} The 'smpl' chunk bytes. |
|
552
|
|
|
* @private |
|
553
|
|
|
*/ |
|
554
|
|
|
getSmplBytes_() { |
|
555
|
|
|
/** @type {!Array<number>} */ |
|
556
|
|
|
let bytes = []; |
|
557
|
|
|
if (this.smpl.chunkId) { |
|
558
|
|
|
/** @type {!Array<number>} */ |
|
559
|
|
|
let smplLoopsBytes = this.getSmplLoopsBytes_(); |
|
560
|
|
|
bytes = bytes.concat( |
|
561
|
|
|
packString(this.smpl.chunkId), |
|
562
|
|
|
pack(smplLoopsBytes.length + 36, this.uInt32_), |
|
563
|
|
|
pack(this.smpl.dwManufacturer, this.uInt32_), |
|
564
|
|
|
pack(this.smpl.dwProduct, this.uInt32_), |
|
565
|
|
|
pack(this.smpl.dwSamplePeriod, this.uInt32_), |
|
566
|
|
|
pack(this.smpl.dwMIDIUnityNote, this.uInt32_), |
|
567
|
|
|
pack(this.smpl.dwMIDIPitchFraction, this.uInt32_), |
|
568
|
|
|
pack(this.smpl.dwSMPTEFormat, this.uInt32_), |
|
569
|
|
|
pack(this.smpl.dwSMPTEOffset, this.uInt32_), |
|
570
|
|
|
pack(this.smpl.dwNumSampleLoops, this.uInt32_), |
|
571
|
|
|
pack(this.smpl.dwSamplerData, this.uInt32_), |
|
572
|
|
|
smplLoopsBytes); |
|
573
|
|
|
} |
|
574
|
|
|
return bytes; |
|
575
|
|
|
} |
|
576
|
|
|
|
|
577
|
|
|
/** |
|
578
|
|
|
* Return the bytes of the 'smpl' loops. |
|
579
|
|
|
* @return {!Array<number>} The 'smpl' loops as an array of bytes. |
|
580
|
|
|
* @private |
|
581
|
|
|
*/ |
|
582
|
|
|
getSmplLoopsBytes_() { |
|
583
|
|
|
/** @type {!Array<number>} */ |
|
584
|
|
|
let loops = []; |
|
585
|
|
|
for (let i=0; i<this.smpl.dwNumSampleLoops; i++) { |
|
586
|
|
|
loops = loops.concat( |
|
587
|
|
|
pack(this.smpl.loops[i].dwName, this.uInt32_), |
|
588
|
|
|
pack(this.smpl.loops[i].dwType, this.uInt32_), |
|
589
|
|
|
pack(this.smpl.loops[i].dwStart, this.uInt32_), |
|
590
|
|
|
pack(this.smpl.loops[i].dwEnd, this.uInt32_), |
|
591
|
|
|
pack(this.smpl.loops[i].dwFraction, this.uInt32_), |
|
592
|
|
|
pack(this.smpl.loops[i].dwPlayCount, this.uInt32_)); |
|
593
|
|
|
} |
|
594
|
|
|
return loops; |
|
595
|
|
|
} |
|
596
|
|
|
|
|
597
|
|
|
/** |
|
598
|
|
|
* Return the bytes of the 'fact' chunk. |
|
599
|
|
|
* @return {!Array<number>} The 'fact' chunk bytes. |
|
600
|
|
|
* @private |
|
601
|
|
|
*/ |
|
602
|
|
|
getFactBytes_() { |
|
603
|
|
|
/** @type {!Array<number>} */ |
|
604
|
|
|
let bytes = []; |
|
605
|
|
|
if (this.fact.chunkId) { |
|
606
|
|
|
bytes = bytes.concat( |
|
607
|
|
|
packString(this.fact.chunkId), |
|
608
|
|
|
pack(this.fact.chunkSize, this.uInt32_), |
|
609
|
|
|
pack(this.fact.dwSampleLength, this.uInt32_)); |
|
610
|
|
|
} |
|
611
|
|
|
return bytes; |
|
612
|
|
|
} |
|
613
|
|
|
|
|
614
|
|
|
/** |
|
615
|
|
|
* Return the bytes of the 'fmt ' chunk. |
|
616
|
|
|
* @return {!Array<number>} The 'fmt' chunk bytes. |
|
617
|
|
|
* @throws {Error} if no 'fmt ' chunk is present. |
|
618
|
|
|
* @private |
|
619
|
|
|
*/ |
|
620
|
|
|
getFmtBytes_() { |
|
621
|
|
|
/** @type {!Array<number>} */ |
|
622
|
|
|
let fmtBytes = []; |
|
623
|
|
|
if (this.fmt.chunkId) { |
|
624
|
|
|
return fmtBytes.concat( |
|
625
|
|
|
packString(this.fmt.chunkId), |
|
626
|
|
|
pack(this.fmt.chunkSize, this.uInt32_), |
|
627
|
|
|
pack(this.fmt.audioFormat, this.uInt16_), |
|
628
|
|
|
pack(this.fmt.numChannels, this.uInt16_), |
|
629
|
|
|
pack(this.fmt.sampleRate, this.uInt32_), |
|
630
|
|
|
pack(this.fmt.byteRate, this.uInt32_), |
|
631
|
|
|
pack(this.fmt.blockAlign, this.uInt16_), |
|
632
|
|
|
pack(this.fmt.bitsPerSample, this.uInt16_), |
|
633
|
|
|
this.getFmtExtensionBytes_()); |
|
634
|
|
|
} |
|
635
|
|
|
throw Error('Could not find the "fmt " chunk'); |
|
636
|
|
|
} |
|
637
|
|
|
|
|
638
|
|
|
/** |
|
639
|
|
|
* Return the bytes of the fmt extension fields. |
|
640
|
|
|
* @return {!Array<number>} The fmt extension bytes. |
|
641
|
|
|
* @private |
|
642
|
|
|
*/ |
|
643
|
|
|
getFmtExtensionBytes_() { |
|
644
|
|
|
/** @type {!Array<number>} */ |
|
645
|
|
|
let extension = []; |
|
646
|
|
|
if (this.fmt.chunkSize > 16) { |
|
647
|
|
|
extension = extension.concat( |
|
648
|
|
|
pack(this.fmt.cbSize, this.uInt16_)); |
|
649
|
|
|
} |
|
650
|
|
|
if (this.fmt.chunkSize > 18) { |
|
651
|
|
|
extension = extension.concat( |
|
652
|
|
|
pack(this.fmt.validBitsPerSample, this.uInt16_)); |
|
653
|
|
|
} |
|
654
|
|
|
if (this.fmt.chunkSize > 20) { |
|
655
|
|
|
extension = extension.concat( |
|
656
|
|
|
pack(this.fmt.dwChannelMask, this.uInt32_)); |
|
657
|
|
|
} |
|
658
|
|
|
if (this.fmt.chunkSize > 24) { |
|
659
|
|
|
extension = extension.concat( |
|
660
|
|
|
pack(this.fmt.subformat[0], this.uInt32_), |
|
661
|
|
|
pack(this.fmt.subformat[1], this.uInt32_), |
|
662
|
|
|
pack(this.fmt.subformat[2], this.uInt32_), |
|
663
|
|
|
pack(this.fmt.subformat[3], this.uInt32_)); |
|
664
|
|
|
} |
|
665
|
|
|
return extension; |
|
666
|
|
|
} |
|
667
|
|
|
|
|
668
|
|
|
/** |
|
669
|
|
|
* Return the bytes of the 'LIST' chunk. |
|
670
|
|
|
* @return {!Array<number>} The 'LIST' chunk bytes. |
|
671
|
|
|
* @private |
|
672
|
|
|
*/ |
|
673
|
|
|
getLISTBytes_() { |
|
674
|
|
|
/** @type {!Array<number>} */ |
|
675
|
|
|
let bytes = []; |
|
676
|
|
|
for (let i=0; i<this.LIST.length; i++) { |
|
677
|
|
|
/** @type {!Array<number>} */ |
|
678
|
|
|
let subChunksBytes = this.getLISTSubChunksBytes_( |
|
679
|
|
|
this.LIST[i].subChunks, this.LIST[i].format); |
|
680
|
|
|
bytes = bytes.concat( |
|
681
|
|
|
packString(this.LIST[i].chunkId), |
|
682
|
|
|
pack(subChunksBytes.length + 4, this.uInt32_), |
|
683
|
|
|
packString(this.LIST[i].format), |
|
684
|
|
|
subChunksBytes); |
|
685
|
|
|
} |
|
686
|
|
|
return bytes; |
|
687
|
|
|
} |
|
688
|
|
|
|
|
689
|
|
|
/** |
|
690
|
|
|
* Return the bytes of the sub chunks of a 'LIST' chunk. |
|
691
|
|
|
* @param {!Array<!Object>} subChunks The 'LIST' sub chunks. |
|
692
|
|
|
* @param {string} format The format of the 'LIST' chunk. |
|
693
|
|
|
* Currently supported values are 'adtl' or 'INFO'. |
|
694
|
|
|
* @return {!Array<number>} The sub chunk bytes. |
|
695
|
|
|
* @private |
|
696
|
|
|
*/ |
|
697
|
|
|
getLISTSubChunksBytes_(subChunks, format) { |
|
698
|
|
|
/** @type {!Array<number>} */ |
|
699
|
|
|
let bytes = []; |
|
700
|
|
|
for (let i=0; i<subChunks.length; i++) { |
|
701
|
|
|
if (format == 'INFO') { |
|
702
|
|
|
bytes = bytes.concat( |
|
703
|
|
|
packString(subChunks[i].chunkId), |
|
704
|
|
|
pack(subChunks[i].value.length + 1, this.uInt32_), |
|
705
|
|
|
writeString( |
|
706
|
|
|
subChunks[i].value, subChunks[i].value.length)); |
|
707
|
|
|
bytes.push(0); |
|
708
|
|
|
} else if (format == 'adtl') { |
|
709
|
|
|
if (['labl', 'note'].indexOf(subChunks[i].chunkId) > -1) { |
|
710
|
|
|
bytes = bytes.concat( |
|
711
|
|
|
packString(subChunks[i].chunkId), |
|
712
|
|
|
pack( |
|
713
|
|
|
subChunks[i].value.length + 4 + 1, this.uInt32_), |
|
714
|
|
|
pack(subChunks[i].dwName, this.uInt32_), |
|
715
|
|
|
writeString( |
|
716
|
|
|
subChunks[i].value, |
|
717
|
|
|
subChunks[i].value.length)); |
|
718
|
|
|
bytes.push(0); |
|
719
|
|
|
} else if (subChunks[i].chunkId == 'ltxt') { |
|
720
|
|
|
bytes = bytes.concat( |
|
721
|
|
|
this.getLtxtChunkBytes_(subChunks[i])); |
|
722
|
|
|
} |
|
723
|
|
|
} |
|
724
|
|
|
if (bytes.length % 2) { |
|
725
|
|
|
bytes.push(0); |
|
726
|
|
|
} |
|
727
|
|
|
} |
|
728
|
|
|
return bytes; |
|
729
|
|
|
} |
|
730
|
|
|
|
|
731
|
|
|
/** |
|
732
|
|
|
* Return the bytes of a 'ltxt' chunk. |
|
733
|
|
|
* @param {!Object} ltxt the 'ltxt' chunk. |
|
734
|
|
|
* @private |
|
735
|
|
|
*/ |
|
736
|
|
|
getLtxtChunkBytes_(ltxt) { |
|
737
|
|
|
return [].concat( |
|
738
|
|
|
packString(ltxt.chunkId), |
|
739
|
|
|
pack(ltxt.value.length + 20, this.uInt32_), |
|
740
|
|
|
pack(ltxt.dwName, this.uInt32_), |
|
741
|
|
|
pack(ltxt.dwSampleLength, this.uInt32_), |
|
742
|
|
|
pack(ltxt.dwPurposeID, this.uInt32_), |
|
743
|
|
|
pack(ltxt.dwCountry, this.uInt16_), |
|
744
|
|
|
pack(ltxt.dwLanguage, this.uInt16_), |
|
745
|
|
|
pack(ltxt.dwDialect, this.uInt16_), |
|
746
|
|
|
pack(ltxt.dwCodePage, this.uInt16_), |
|
747
|
|
|
writeString(ltxt.value, ltxt.value.length)); |
|
748
|
|
|
} |
|
749
|
|
|
|
|
750
|
|
|
/** |
|
751
|
|
|
* Return the bytes of the 'junk' chunk. |
|
752
|
|
|
* @private |
|
753
|
|
|
*/ |
|
754
|
|
|
getJunkBytes_() { |
|
755
|
|
|
/** @type {!Array<number>} */ |
|
756
|
|
|
let bytes = []; |
|
757
|
|
|
if (this.junk.chunkId) { |
|
758
|
|
|
return bytes.concat( |
|
759
|
|
|
packString(this.junk.chunkId), |
|
760
|
|
|
pack(this.junk.chunkData.length, this.uInt32_), |
|
761
|
|
|
this.junk.chunkData); |
|
762
|
|
|
} |
|
763
|
|
|
return bytes; |
|
764
|
|
|
} |
|
765
|
|
|
|
|
766
|
|
|
/** |
|
767
|
|
|
* Read the 'fmt ' chunk of a wave file. |
|
768
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
769
|
|
|
* @throws {Error} If no 'fmt ' chunk is found. |
|
770
|
|
|
* @private |
|
771
|
|
|
*/ |
|
772
|
|
|
readFmtChunk_(buffer) { |
|
773
|
|
|
/** @type {?Object} */ |
|
774
|
|
|
let chunk = this.findChunk('fmt '); |
|
775
|
|
|
if (chunk) { |
|
776
|
|
|
this.head_ = chunk.chunkData.start; |
|
777
|
|
|
this.fmt.chunkId = chunk.chunkId; |
|
778
|
|
|
this.fmt.chunkSize = chunk.chunkSize; |
|
779
|
|
|
this.fmt.audioFormat = this.readNumber(buffer, this.uInt16_); |
|
780
|
|
|
this.fmt.numChannels = this.readNumber(buffer, this.uInt16_); |
|
781
|
|
|
this.fmt.sampleRate = this.readNumber(buffer, this.uInt32_); |
|
782
|
|
|
this.fmt.byteRate = this.readNumber(buffer, this.uInt32_); |
|
783
|
|
|
this.fmt.blockAlign = this.readNumber(buffer, this.uInt16_); |
|
784
|
|
|
this.fmt.bitsPerSample = this.readNumber(buffer, this.uInt16_); |
|
785
|
|
|
this.readFmtExtension_(buffer); |
|
786
|
|
|
} else { |
|
787
|
|
|
throw Error('Could not find the "fmt " chunk'); |
|
788
|
|
|
} |
|
789
|
|
|
} |
|
790
|
|
|
|
|
791
|
|
|
/** |
|
792
|
|
|
* Read the 'fmt ' chunk extension. |
|
793
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
794
|
|
|
* @private |
|
795
|
|
|
*/ |
|
796
|
|
|
readFmtExtension_(buffer) { |
|
797
|
|
|
if (this.fmt.chunkSize > 16) { |
|
798
|
|
|
this.fmt.cbSize = this.readNumber(buffer, this.uInt16_); |
|
799
|
|
|
if (this.fmt.chunkSize > 18) { |
|
800
|
|
|
this.fmt.validBitsPerSample = this.readNumber(buffer, this.uInt16_); |
|
801
|
|
|
if (this.fmt.chunkSize > 20) { |
|
802
|
|
|
this.fmt.dwChannelMask = this.readNumber(buffer, this.uInt32_); |
|
803
|
|
|
this.fmt.subformat = [ |
|
804
|
|
|
this.readNumber(buffer, this.uInt32_), |
|
805
|
|
|
this.readNumber(buffer, this.uInt32_), |
|
806
|
|
|
this.readNumber(buffer, this.uInt32_), |
|
807
|
|
|
this.readNumber(buffer, this.uInt32_)]; |
|
808
|
|
|
} |
|
809
|
|
|
} |
|
810
|
|
|
} |
|
811
|
|
|
} |
|
812
|
|
|
|
|
813
|
|
|
/** |
|
814
|
|
|
* Read the 'fact' chunk of a wav file. |
|
815
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
816
|
|
|
* @private |
|
817
|
|
|
*/ |
|
818
|
|
|
readFactChunk_(buffer) { |
|
819
|
|
|
/** @type {?Object} */ |
|
820
|
|
|
let chunk = this.findChunk('fact'); |
|
821
|
|
|
if (chunk) { |
|
822
|
|
|
this.head_ = chunk.chunkData.start; |
|
823
|
|
|
this.fact.chunkId = chunk.chunkId; |
|
824
|
|
|
this.fact.chunkSize = chunk.chunkSize; |
|
825
|
|
|
this.fact.dwSampleLength = this.readNumber(buffer, this.uInt32_); |
|
826
|
|
|
} |
|
827
|
|
|
} |
|
828
|
|
|
|
|
829
|
|
|
/** |
|
830
|
|
|
* Read the 'cue ' chunk of a wave file. |
|
831
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
832
|
|
|
* @private |
|
833
|
|
|
*/ |
|
834
|
|
|
readCueChunk_(buffer) { |
|
835
|
|
|
/** @type {?Object} */ |
|
836
|
|
|
let chunk = this.findChunk('cue '); |
|
837
|
|
|
if (chunk) { |
|
838
|
|
|
this.head_ = chunk.chunkData.start; |
|
839
|
|
|
this.cue.chunkId = chunk.chunkId; |
|
840
|
|
|
this.cue.chunkSize = chunk.chunkSize; |
|
841
|
|
|
this.cue.dwCuePoints = this.readNumber(buffer, this.uInt32_); |
|
842
|
|
|
for (let i = 0; i < this.cue.dwCuePoints; i++) { |
|
843
|
|
|
this.cue.points.push({ |
|
844
|
|
|
dwName: this.readNumber(buffer, this.uInt32_), |
|
845
|
|
|
dwPosition: this.readNumber(buffer, this.uInt32_), |
|
846
|
|
|
fccChunk: this.readString(buffer, 4), |
|
847
|
|
|
dwChunkStart: this.readNumber(buffer, this.uInt32_), |
|
848
|
|
|
dwBlockStart: this.readNumber(buffer, this.uInt32_), |
|
849
|
|
|
dwSampleOffset: this.readNumber(buffer, this.uInt32_), |
|
850
|
|
|
}); |
|
851
|
|
|
} |
|
852
|
|
|
} |
|
853
|
|
|
} |
|
854
|
|
|
|
|
855
|
|
|
/** |
|
856
|
|
|
* Read the 'smpl' chunk of a wave file. |
|
857
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
858
|
|
|
* @private |
|
859
|
|
|
*/ |
|
860
|
|
|
readSmplChunk_(buffer) { |
|
861
|
|
|
/** @type {?Object} */ |
|
862
|
|
|
let chunk = this.findChunk('smpl'); |
|
863
|
|
|
if (chunk) { |
|
864
|
|
|
this.head_ = chunk.chunkData.start; |
|
865
|
|
|
this.smpl.chunkId = chunk.chunkId; |
|
866
|
|
|
this.smpl.chunkSize = chunk.chunkSize; |
|
867
|
|
|
this.smpl.dwManufacturer = this.readNumber(buffer, this.uInt32_); |
|
868
|
|
|
this.smpl.dwProduct = this.readNumber(buffer, this.uInt32_); |
|
869
|
|
|
this.smpl.dwSamplePeriod = this.readNumber(buffer, this.uInt32_); |
|
870
|
|
|
this.smpl.dwMIDIUnityNote = this.readNumber(buffer, this.uInt32_); |
|
871
|
|
|
this.smpl.dwMIDIPitchFraction = this.readNumber(buffer, this.uInt32_); |
|
872
|
|
|
this.smpl.dwSMPTEFormat = this.readNumber(buffer, this.uInt32_); |
|
873
|
|
|
this.smpl.dwSMPTEOffset = this.readNumber(buffer, this.uInt32_); |
|
874
|
|
|
this.smpl.dwNumSampleLoops = this.readNumber(buffer, this.uInt32_); |
|
875
|
|
|
this.smpl.dwSamplerData = this.readNumber(buffer, this.uInt32_); |
|
876
|
|
|
for (let i = 0; i < this.smpl.dwNumSampleLoops; i++) { |
|
877
|
|
|
this.smpl.loops.push({ |
|
878
|
|
|
dwName: this.readNumber(buffer, this.uInt32_), |
|
879
|
|
|
dwType: this.readNumber(buffer, this.uInt32_), |
|
880
|
|
|
dwStart: this.readNumber(buffer, this.uInt32_), |
|
881
|
|
|
dwEnd: this.readNumber(buffer, this.uInt32_), |
|
882
|
|
|
dwFraction: this.readNumber(buffer, this.uInt32_), |
|
883
|
|
|
dwPlayCount: this.readNumber(buffer, this.uInt32_), |
|
884
|
|
|
}); |
|
885
|
|
|
} |
|
886
|
|
|
} |
|
887
|
|
|
} |
|
888
|
|
|
|
|
889
|
|
|
/** |
|
890
|
|
|
* Read the 'data' chunk of a wave file. |
|
891
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
892
|
|
|
* @param {boolean} samples True if the samples should be loaded. |
|
893
|
|
|
* @throws {Error} If no 'data' chunk is found. |
|
894
|
|
|
* @private |
|
895
|
|
|
*/ |
|
896
|
|
|
readDataChunk_(buffer, samples) { |
|
897
|
|
|
/** @type {?Object} */ |
|
898
|
|
|
let chunk = this.findChunk('data'); |
|
899
|
|
|
if (chunk) { |
|
900
|
|
|
this.data.chunkId = 'data'; |
|
901
|
|
|
this.data.chunkSize = chunk.chunkSize; |
|
902
|
|
|
if (samples) { |
|
903
|
|
|
this.data.samples = buffer.slice( |
|
904
|
|
|
chunk.chunkData.start, |
|
905
|
|
|
chunk.chunkData.end); |
|
906
|
|
|
} |
|
907
|
|
|
} else { |
|
908
|
|
|
throw Error('Could not find the "data" chunk'); |
|
909
|
|
|
} |
|
910
|
|
|
} |
|
911
|
|
|
|
|
912
|
|
|
/** |
|
913
|
|
|
* Read the 'bext' chunk of a wav file. |
|
914
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
915
|
|
|
* @private |
|
916
|
|
|
*/ |
|
917
|
|
|
readBextChunk_(buffer) { |
|
918
|
|
|
/** @type {?Object} */ |
|
919
|
|
|
let chunk = this.findChunk('bext'); |
|
920
|
|
|
if (chunk) { |
|
921
|
|
|
this.head_ = chunk.chunkData.start; |
|
922
|
|
|
this.bext.chunkId = chunk.chunkId; |
|
923
|
|
|
this.bext.chunkSize = chunk.chunkSize; |
|
924
|
|
|
this.bext.description = this.readString(buffer, 256); |
|
925
|
|
|
this.bext.originator = this.readString(buffer, 32); |
|
926
|
|
|
this.bext.originatorReference = this.readString(buffer, 32); |
|
927
|
|
|
this.bext.originationDate = this.readString(buffer, 10); |
|
928
|
|
|
this.bext.originationTime = this.readString(buffer, 8); |
|
929
|
|
|
this.bext.timeReference = [ |
|
930
|
|
|
this.readNumber(buffer, this.uInt32_), |
|
931
|
|
|
this.readNumber(buffer, this.uInt32_)]; |
|
932
|
|
|
this.bext.version = this.readNumber(buffer, this.uInt16_); |
|
933
|
|
|
this.bext.UMID = this.readString(buffer, 64); |
|
934
|
|
|
this.bext.loudnessValue = this.readNumber(buffer, this.uInt16_); |
|
935
|
|
|
this.bext.loudnessRange = this.readNumber(buffer, this.uInt16_); |
|
936
|
|
|
this.bext.maxTruePeakLevel = this.readNumber(buffer, this.uInt16_); |
|
937
|
|
|
this.bext.maxMomentaryLoudness = this.readNumber(buffer, this.uInt16_); |
|
938
|
|
|
this.bext.maxShortTermLoudness = this.readNumber(buffer, this.uInt16_); |
|
939
|
|
|
this.bext.reserved = this.readString(buffer, 180); |
|
940
|
|
|
this.bext.codingHistory = this.readString( |
|
941
|
|
|
buffer, this.bext.chunkSize - 602); |
|
942
|
|
|
} |
|
943
|
|
|
} |
|
944
|
|
|
|
|
945
|
|
|
/** |
|
946
|
|
|
* Read the 'ds64' chunk of a wave file. |
|
947
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
948
|
|
|
* @throws {Error} If no 'ds64' chunk is found and the file is RF64. |
|
949
|
|
|
* @private |
|
950
|
|
|
*/ |
|
951
|
|
|
readDs64Chunk_(buffer) { |
|
952
|
|
|
/** @type {?Object} */ |
|
953
|
|
|
let chunk = this.findChunk('ds64'); |
|
954
|
|
|
if (chunk) { |
|
955
|
|
|
this.head_ = chunk.chunkData.start; |
|
956
|
|
|
this.ds64.chunkId = chunk.chunkId; |
|
957
|
|
|
this.ds64.chunkSize = chunk.chunkSize; |
|
958
|
|
|
this.ds64.riffSizeHigh = this.readNumber(buffer, this.uInt32_); |
|
959
|
|
|
this.ds64.riffSizeLow = this.readNumber(buffer, this.uInt32_); |
|
960
|
|
|
this.ds64.dataSizeHigh = this.readNumber(buffer, this.uInt32_); |
|
961
|
|
|
this.ds64.dataSizeLow = this.readNumber(buffer, this.uInt32_); |
|
962
|
|
|
this.ds64.originationTime = this.readNumber(buffer, this.uInt32_); |
|
963
|
|
|
this.ds64.sampleCountHigh = this.readNumber(buffer, this.uInt32_); |
|
964
|
|
|
this.ds64.sampleCountLow = this.readNumber(buffer, this.uInt32_); |
|
965
|
|
|
//if (wav.ds64.chunkSize > 28) { |
|
966
|
|
|
// wav.ds64.tableLength = unpack( |
|
967
|
|
|
// chunkData.slice(28, 32), uInt32_); |
|
968
|
|
|
// wav.ds64.table = chunkData.slice( |
|
969
|
|
|
// 32, 32 + wav.ds64.tableLength); |
|
970
|
|
|
//} |
|
971
|
|
|
} else { |
|
972
|
|
|
if (this.container == 'RF64') { |
|
973
|
|
|
throw Error('Could not find the "ds64" chunk'); |
|
974
|
|
|
} |
|
975
|
|
|
} |
|
976
|
|
|
} |
|
977
|
|
|
|
|
978
|
|
|
/** |
|
979
|
|
|
* Read the 'LIST' chunks of a wave file. |
|
980
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
981
|
|
|
* @private |
|
982
|
|
|
*/ |
|
983
|
|
|
readLISTChunk_(buffer) { |
|
984
|
|
|
/** @type {?Object} */ |
|
985
|
|
|
let listChunks = this.findChunk('LIST', true); |
|
986
|
|
|
if (listChunks !== null) { |
|
987
|
|
|
for (let j=0; j < listChunks.length; j++) { |
|
988
|
|
|
/** @type {!Object} */ |
|
989
|
|
|
let subChunk = listChunks[j]; |
|
990
|
|
|
this.LIST.push({ |
|
991
|
|
|
chunkId: subChunk.chunkId, |
|
992
|
|
|
chunkSize: subChunk.chunkSize, |
|
993
|
|
|
format: subChunk.format, |
|
994
|
|
|
subChunks: []}); |
|
995
|
|
|
for (let x=0; x<subChunk.subChunks.length; x++) { |
|
996
|
|
|
this.readLISTSubChunks_(subChunk.subChunks[x], |
|
997
|
|
|
subChunk.format, buffer); |
|
998
|
|
|
} |
|
999
|
|
|
} |
|
1000
|
|
|
} |
|
1001
|
|
|
} |
|
1002
|
|
|
|
|
1003
|
|
|
/** |
|
1004
|
|
|
* Read the sub chunks of a 'LIST' chunk. |
|
1005
|
|
|
* @param {!Object} subChunk The 'LIST' subchunks. |
|
1006
|
|
|
* @param {string} format The 'LIST' format, 'adtl' or 'INFO'. |
|
1007
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
1008
|
|
|
* @private |
|
1009
|
|
|
*/ |
|
1010
|
|
|
readLISTSubChunks_(subChunk, format, buffer) { |
|
1011
|
|
|
if (format == 'adtl') { |
|
1012
|
|
|
if (['labl', 'note','ltxt'].indexOf(subChunk.chunkId) > -1) { |
|
1013
|
|
|
this.head_ = subChunk.chunkData.start; |
|
1014
|
|
|
/** @type {!Object<string, string|number>} */ |
|
1015
|
|
|
let item = { |
|
1016
|
|
|
chunkId: subChunk.chunkId, |
|
1017
|
|
|
chunkSize: subChunk.chunkSize, |
|
1018
|
|
|
dwName: this.readNumber(buffer, this.uInt32_) |
|
1019
|
|
|
}; |
|
1020
|
|
|
if (subChunk.chunkId == 'ltxt') { |
|
1021
|
|
|
item.dwSampleLength = this.readNumber(buffer, this.uInt32_); |
|
1022
|
|
|
item.dwPurposeID = this.readNumber(buffer, this.uInt32_); |
|
1023
|
|
|
item.dwCountry = this.readNumber(buffer, this.uInt16_); |
|
1024
|
|
|
item.dwLanguage = this.readNumber(buffer, this.uInt16_); |
|
1025
|
|
|
item.dwDialect = this.readNumber(buffer, this.uInt16_); |
|
1026
|
|
|
item.dwCodePage = this.readNumber(buffer, this.uInt16_); |
|
1027
|
|
|
} |
|
1028
|
|
|
item.value = this.readZSTR(buffer, this.head_); |
|
1029
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push(item); |
|
1030
|
|
|
} |
|
1031
|
|
|
// RIFF INFO tags like ICRD, ISFT, ICMT |
|
1032
|
|
|
} else if(format == 'INFO') { |
|
1033
|
|
|
this.head_ = subChunk.chunkData.start; |
|
1034
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push({ |
|
1035
|
|
|
chunkId: subChunk.chunkId, |
|
1036
|
|
|
chunkSize: subChunk.chunkSize, |
|
1037
|
|
|
value: this.readZSTR(buffer, this.head_) |
|
1038
|
|
|
}); |
|
1039
|
|
|
} |
|
1040
|
|
|
} |
|
1041
|
|
|
|
|
1042
|
|
|
/** |
|
1043
|
|
|
* Read the 'junk' chunk of a wave file. |
|
1044
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
1045
|
|
|
* @private |
|
1046
|
|
|
*/ |
|
1047
|
|
|
readJunkChunk_(buffer) { |
|
1048
|
|
|
/** @type {?Object} */ |
|
1049
|
|
|
let chunk = this.findChunk('junk'); |
|
1050
|
|
|
if (chunk) { |
|
1051
|
|
|
this.junk = { |
|
1052
|
|
|
chunkId: chunk.chunkId, |
|
1053
|
|
|
chunkSize: chunk.chunkSize, |
|
1054
|
|
|
chunkData: [].slice.call(buffer.slice( |
|
1055
|
|
|
chunk.chunkData.start, |
|
1056
|
|
|
chunk.chunkData.end)) |
|
1057
|
|
|
}; |
|
1058
|
|
|
} |
|
1059
|
|
|
} |
|
1060
|
|
|
|
|
1061
|
|
|
/** |
|
1062
|
|
|
* Validate the bit depth. |
|
1063
|
|
|
* @return {boolean} True is the bit depth is valid. |
|
1064
|
|
|
* @throws {Error} If bit depth is invalid. |
|
1065
|
|
|
* @private |
|
1066
|
|
|
*/ |
|
1067
|
|
|
validateBitDepth_() { |
|
1068
|
|
|
if (!this.WAV_AUDIO_FORMATS[this.bitDepth]) { |
|
1069
|
|
|
if (parseInt(this.bitDepth, 10) > 8 && |
|
1070
|
|
|
parseInt(this.bitDepth, 10) < 54) { |
|
1071
|
|
|
return true; |
|
1072
|
|
|
} |
|
1073
|
|
|
throw new Error('Invalid bit depth.'); |
|
1074
|
|
|
} |
|
1075
|
|
|
return true; |
|
1076
|
|
|
} |
|
1077
|
|
|
} |
|
1078
|
|
|
|
rochars /
wavefile
