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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 A class to read and write wav data. |
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* @see https://github.com/rochars/wavefile |
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*/ |
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import riffChunks from '../vendor/riff-chunks.js'; |
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import {pack, unpackFrom, unpackString, |
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packStringTo, packTo, packString,} from '../vendor/byte-data.js'; |
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// @type {WavStruct} |
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import WavStruct from './wavstruct.js'; |
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/** |
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* A class to read and write wav data. |
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* @extends WavStruct |
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*/ |
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export default class WavIO extends WavStruct { |
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constructor() { |
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super(); |
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/** |
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* @type {!Object} |
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* @private |
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*/ |
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this.uInt16_ = {bits: 16, be: false}; |
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/** |
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* @type {!Object} |
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* @private |
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*/ |
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this.uInt32_ = {bits: 32, be: false}; |
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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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* Audio formats. |
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* Formats not listed here will be set to 65534 |
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* and treated as WAVE_FORMAT_EXTENSIBLE |
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* @enum {number} |
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* @private |
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*/ |
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this.audioFormats_ = { |
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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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* @type {number} |
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* @private |
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*/ |
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this.head_ = 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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} |
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/** |
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* Write a variable size string as bytes. If the string is smaller |
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* than the max size the output array is filled with 0s. |
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* @param {string} str The string to be written as bytes. |
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* @param {number} maxSize the max size of the string. |
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* @return {!Array<number>} The bytes. |
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* @private |
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*/ |
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writeString_(str, maxSize, push=true) { |
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/** @type {!Array<number>} */ |
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let bytes = packString(str); |
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if (push) { |
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for (let i=bytes.length; i<maxSize; i++) { |
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bytes.push(0); |
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} |
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} |
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return bytes; |
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} |
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/** |
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* Return the bytes of the 'bext' chunk. |
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* @return {!Array<number>} The 'bext' chunk bytes. |
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* @private |
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*/ |
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getBextBytes_() { |
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/** @type {!Array<number>} */ |
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let bytes = []; |
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this.enforceBext_(); |
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if (this.bext.chunkId) { |
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this.bext.chunkSize = 602 + this.bext.codingHistory.length; |
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bytes = bytes.concat( |
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packString(this.bext.chunkId), |
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pack(602 + this.bext.codingHistory.length, this.uInt32_), |
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this.writeString_(this.bext.description, 256), |
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this.writeString_(this.bext.originator, 32), |
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this.writeString_(this.bext.originatorReference, 32), |
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this.writeString_(this.bext.originationDate, 10), |
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this.writeString_(this.bext.originationTime, 8), |
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pack(this.bext.timeReference[0], this.uInt32_), |
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pack(this.bext.timeReference[1], this.uInt32_), |
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pack(this.bext.version, this.uInt16_), |
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this.writeString_(this.bext.UMID, 64), |
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pack(this.bext.loudnessValue, this.uInt16_), |
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pack(this.bext.loudnessRange, this.uInt16_), |
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pack(this.bext.maxTruePeakLevel, this.uInt16_), |
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pack(this.bext.maxMomentaryLoudness, this.uInt16_), |
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pack(this.bext.maxShortTermLoudness, this.uInt16_), |
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this.writeString_(this.bext.reserved, 180), |
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this.writeString_( |
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this.bext.codingHistory, this.bext.codingHistory.length)); |
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} |
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return bytes; |
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} |
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/** |
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* Make sure a 'bext' chunk is created if BWF data was created in a file. |
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* @private |
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*/ |
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enforceBext_() { |
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for (var prop in this.bext) { |
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if (this.bext.hasOwnProperty(prop)) { |
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if (this.bext[prop] && prop != 'timeReference') { |
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this.bext.chunkId = 'bext'; |
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break; |
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} |
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} |
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} |
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if (this.bext.timeReference[0] || this.bext.timeReference[1]) { |
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this.bext.chunkId = 'bext'; |
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} |
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} |
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/** |
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* Return the bytes of the 'ds64' chunk. |
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* @return {!Array<number>} The 'ds64' chunk bytes. |
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* @private |
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*/ |
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getDs64Bytes_() { |
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/** @type {!Array<number>} */ |
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let bytes = []; |
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if (this.ds64.chunkId) { |
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bytes = bytes.concat( |
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packString(this.ds64.chunkId), |
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pack(this.ds64.chunkSize, this.uInt32_), |
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pack(this.ds64.riffSizeHigh, this.uInt32_), |
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pack(this.ds64.riffSizeLow, this.uInt32_), |
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pack(this.ds64.dataSizeHigh, this.uInt32_), |
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pack(this.ds64.dataSizeLow, this.uInt32_), |
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pack(this.ds64.originationTime, this.uInt32_), |
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pack(this.ds64.sampleCountHigh, this.uInt32_), |
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pack(this.ds64.sampleCountLow, this.uInt32_)); |
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} |
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//if (this.ds64.tableLength) { |
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// ds64Bytes = ds64Bytes.concat( |
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// pack(this.ds64.tableLength, this.uInt32_), |
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// this.ds64.table); |
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//} |
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return bytes; |
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} |
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/** |
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* Return the bytes of the 'cue ' chunk. |
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* @return {!Array<number>} The 'cue ' chunk bytes. |
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* @private |
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*/ |
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getCueBytes_() { |
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/** @type {!Array<number>} */ |
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let bytes = []; |
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if (this.cue.chunkId) { |
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/** @type {!Array<number>} */ |
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let cuePointsBytes = this.getCuePointsBytes_(); |
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bytes = bytes.concat( |
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packString(this.cue.chunkId), |
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pack(cuePointsBytes.length + 4, this.uInt32_), |
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pack(this.cue.dwCuePoints, this.uInt32_), |
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cuePointsBytes); |
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} |
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return bytes; |
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} |
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/** |
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* Return the bytes of the 'cue ' points. |
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* @return {!Array<number>} The 'cue ' points as an array of bytes. |
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* @private |
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*/ |
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getCuePointsBytes_() { |
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/** @type {!Array<number>} */ |
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let points = []; |
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for (let i=0; i<this.cue.dwCuePoints; i++) { |
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points = points.concat( |
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pack(this.cue.points[i].dwName, this.uInt32_), |
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pack(this.cue.points[i].dwPosition, this.uInt32_), |
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packString(this.cue.points[i].fccChunk), |
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pack(this.cue.points[i].dwChunkStart, this.uInt32_), |
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pack(this.cue.points[i].dwBlockStart, this.uInt32_), |
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pack(this.cue.points[i].dwSampleOffset, this.uInt32_)); |
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} |
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return points; |
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} |
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/** |
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* Return the bytes of the 'smpl' chunk. |
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* @return {!Array<number>} The 'smpl' chunk bytes. |
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* @private |
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*/ |
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getSmplBytes_() { |
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/** @type {!Array<number>} */ |
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let bytes = []; |
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if (this.smpl.chunkId) { |
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/** @type {!Array<number>} */ |
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let smplLoopsBytes = this.getSmplLoopsBytes_(); |
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bytes = bytes.concat( |
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packString(this.smpl.chunkId), |
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pack(smplLoopsBytes.length + 36, this.uInt32_), |
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pack(this.smpl.dwManufacturer, this.uInt32_), |
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pack(this.smpl.dwProduct, this.uInt32_), |
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pack(this.smpl.dwSamplePeriod, this.uInt32_), |
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pack(this.smpl.dwMIDIUnityNote, this.uInt32_), |
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pack(this.smpl.dwMIDIPitchFraction, this.uInt32_), |
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pack(this.smpl.dwSMPTEFormat, this.uInt32_), |
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pack(this.smpl.dwSMPTEOffset, this.uInt32_), |
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pack(this.smpl.dwNumSampleLoops, this.uInt32_), |
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pack(this.smpl.dwSamplerData, this.uInt32_), |
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smplLoopsBytes); |
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} |
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return bytes; |
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} |
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/** |
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* Return the bytes of the 'smpl' loops. |
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* @return {!Array<number>} The 'smpl' loops as an array of bytes. |
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* @private |
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*/ |
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getSmplLoopsBytes_() { |
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/** @type {!Array<number>} */ |
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let loops = []; |
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for (let i=0; i<this.smpl.dwNumSampleLoops; i++) { |
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loops = loops.concat( |
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pack(this.smpl.loops[i].dwName, this.uInt32_), |
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pack(this.smpl.loops[i].dwType, this.uInt32_), |
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pack(this.smpl.loops[i].dwStart, this.uInt32_), |
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pack(this.smpl.loops[i].dwEnd, this.uInt32_), |
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pack(this.smpl.loops[i].dwFraction, this.uInt32_), |
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pack(this.smpl.loops[i].dwPlayCount, this.uInt32_)); |
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} |
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return loops; |
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} |
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/** |
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* Return the bytes of the 'fact' chunk. |
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* @return {!Array<number>} The 'fact' chunk bytes. |
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* @private |
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*/ |
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getFactBytes_() { |
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/** @type {!Array<number>} */ |
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let bytes = []; |
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if (this.fact.chunkId) { |
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bytes = bytes.concat( |
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packString(this.fact.chunkId), |
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pack(this.fact.chunkSize, this.uInt32_), |
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pack(this.fact.dwSampleLength, this.uInt32_)); |
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} |
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return bytes; |
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} |
294
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295
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/** |
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* Return the bytes of the 'fmt ' chunk. |
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* @return {!Array<number>} The 'fmt' chunk bytes. |
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* @throws {Error} if no 'fmt ' chunk is present. |
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* @private |
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*/ |
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getFmtBytes_() { |
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/** @type {!Array<number>} */ |
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let fmtBytes = []; |
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if (this.fmt.chunkId) { |
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return fmtBytes.concat( |
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packString(this.fmt.chunkId), |
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pack(this.fmt.chunkSize, this.uInt32_), |
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pack(this.fmt.audioFormat, this.uInt16_), |
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pack(this.fmt.numChannels, this.uInt16_), |
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pack(this.fmt.sampleRate, this.uInt32_), |
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pack(this.fmt.byteRate, this.uInt32_), |
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pack(this.fmt.blockAlign, this.uInt16_), |
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pack(this.fmt.bitsPerSample, this.uInt16_), |
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this.getFmtExtensionBytes_()); |
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} |
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throw Error('Could not find the "fmt " chunk'); |
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} |
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|
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/** |
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* Return the bytes of the fmt extension fields. |
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* @return {!Array<number>} The fmt extension bytes. |
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* @private |
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*/ |
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getFmtExtensionBytes_() { |
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/** @type {!Array<number>} */ |
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let extension = []; |
327
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if (this.fmt.chunkSize > 16) { |
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extension = extension.concat( |
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pack(this.fmt.cbSize, this.uInt16_)); |
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} |
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if (this.fmt.chunkSize > 18) { |
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extension = extension.concat( |
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pack(this.fmt.validBitsPerSample, this.uInt16_)); |
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} |
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if (this.fmt.chunkSize > 20) { |
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extension = extension.concat( |
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pack(this.fmt.dwChannelMask, this.uInt32_)); |
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} |
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if (this.fmt.chunkSize > 24) { |
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extension = extension.concat( |
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pack(this.fmt.subformat[0], this.uInt32_), |
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pack(this.fmt.subformat[1], this.uInt32_), |
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|
|
pack(this.fmt.subformat[2], this.uInt32_), |
344
|
|
|
pack(this.fmt.subformat[3], this.uInt32_)); |
345
|
|
|
} |
346
|
|
|
return extension; |
347
|
|
|
} |
348
|
|
|
|
349
|
|
|
/** |
350
|
|
|
* Return the bytes of the 'LIST' chunk. |
351
|
|
|
* @return {!Array<number>} The 'LIST' chunk bytes. |
352
|
|
|
*/ |
353
|
|
|
getLISTBytes_() { |
354
|
|
|
/** @type {!Array<number>} */ |
355
|
|
|
let bytes = []; |
356
|
|
|
for (let i=0; i<this.LIST.length; i++) { |
357
|
|
|
/** @type {!Array<number>} */ |
358
|
|
|
let subChunksBytes = this.getLISTSubChunksBytes_( |
359
|
|
|
this.LIST[i].subChunks, this.LIST[i].format); |
360
|
|
|
bytes = bytes.concat( |
361
|
|
|
packString(this.LIST[i].chunkId), |
362
|
|
|
pack(subChunksBytes.length + 4, this.uInt32_), |
363
|
|
|
packString(this.LIST[i].format), |
364
|
|
|
subChunksBytes); |
365
|
|
|
} |
366
|
|
|
return bytes; |
367
|
|
|
} |
368
|
|
|
|
369
|
|
|
/** |
370
|
|
|
* Return the bytes of the sub chunks of a 'LIST' chunk. |
371
|
|
|
* @param {!Array<!Object>} subChunks The 'LIST' sub chunks. |
372
|
|
|
* @param {string} format The format of the 'LIST' chunk. |
373
|
|
|
* Currently supported values are 'adtl' or 'INFO'. |
374
|
|
|
* @return {!Array<number>} The sub chunk bytes. |
375
|
|
|
* @private |
376
|
|
|
*/ |
377
|
|
|
getLISTSubChunksBytes_(subChunks, format) { |
378
|
|
|
/** @type {!Array<number>} */ |
379
|
|
|
let bytes = []; |
380
|
|
|
for (let i=0; i<subChunks.length; i++) { |
381
|
|
|
if (format == 'INFO') { |
382
|
|
|
bytes = bytes.concat( |
383
|
|
|
packString(subChunks[i].chunkId), |
384
|
|
|
pack(subChunks[i].value.length + 1, this.uInt32_), |
385
|
|
|
this.writeString_( |
386
|
|
|
subChunks[i].value, subChunks[i].value.length)); |
387
|
|
|
bytes.push(0); |
388
|
|
|
} else if (format == 'adtl') { |
389
|
|
|
if (['labl', 'note'].indexOf(subChunks[i].chunkId) > -1) { |
390
|
|
|
bytes = bytes.concat( |
391
|
|
|
packString(subChunks[i].chunkId), |
392
|
|
|
pack( |
393
|
|
|
subChunks[i].value.length + 4 + 1, this.uInt32_), |
394
|
|
|
pack(subChunks[i].dwName, this.uInt32_), |
395
|
|
|
this.writeString_( |
396
|
|
|
subChunks[i].value, |
397
|
|
|
subChunks[i].value.length)); |
398
|
|
|
bytes.push(0); |
399
|
|
|
} else if (subChunks[i].chunkId == 'ltxt') { |
400
|
|
|
bytes = bytes.concat( |
401
|
|
|
this.getLtxtChunkBytes_(subChunks[i])); |
402
|
|
|
} |
403
|
|
|
} |
404
|
|
|
if (bytes.length % 2) { |
405
|
|
|
bytes.push(0); |
406
|
|
|
} |
407
|
|
|
} |
408
|
|
|
return bytes; |
409
|
|
|
} |
410
|
|
|
|
411
|
|
|
/** |
412
|
|
|
* Return the bytes of a 'ltxt' chunk. |
413
|
|
|
* @param {!Object} ltxt the 'ltxt' chunk. |
414
|
|
|
* @return {!Array<number>} The 'ltxt' chunk bytes. |
415
|
|
|
* @private |
416
|
|
|
*/ |
417
|
|
|
getLtxtChunkBytes_(ltxt) { |
418
|
|
|
return [].concat( |
419
|
|
|
packString(ltxt.chunkId), |
420
|
|
|
pack(ltxt.value.length + 20, this.uInt32_), |
421
|
|
|
pack(ltxt.dwName, this.uInt32_), |
422
|
|
|
pack(ltxt.dwSampleLength, this.uInt32_), |
423
|
|
|
pack(ltxt.dwPurposeID, this.uInt32_), |
424
|
|
|
pack(ltxt.dwCountry, this.uInt16_), |
425
|
|
|
pack(ltxt.dwLanguage, this.uInt16_), |
426
|
|
|
pack(ltxt.dwDialect, this.uInt16_), |
427
|
|
|
pack(ltxt.dwCodePage, this.uInt16_), |
428
|
|
|
this.writeString_(ltxt.value, ltxt.value.length)); |
429
|
|
|
} |
430
|
|
|
|
431
|
|
|
/** |
432
|
|
|
* Return the bytes of the 'junk' chunk. |
433
|
|
|
* @return {!Array<number>} The 'junk' chunk bytes. |
434
|
|
|
* @private |
435
|
|
|
*/ |
436
|
|
|
getJunkBytes_() { |
437
|
|
|
/** @type {!Array<number>} */ |
438
|
|
|
let bytes = []; |
439
|
|
|
if (this.junk.chunkId) { |
440
|
|
|
return bytes.concat( |
441
|
|
|
packString(this.junk.chunkId), |
442
|
|
|
pack(this.junk.chunkData.length, this.uInt32_), |
443
|
|
|
this.junk.chunkData); |
444
|
|
|
} |
445
|
|
|
return bytes; |
446
|
|
|
} |
447
|
|
|
|
448
|
|
|
/** |
449
|
|
|
* Return 'RIFF' if the container is 'RF64', the current container name |
450
|
|
|
* otherwise. Used to enforce 'RIFF' when RF64 is not allowed. |
451
|
|
|
* @return {string} |
452
|
|
|
* @private |
453
|
|
|
*/ |
454
|
|
|
correctContainer_() { |
455
|
|
|
return this.container == 'RF64' ? 'RIFF' : this.container; |
456
|
|
|
} |
457
|
|
|
|
458
|
|
|
/** |
459
|
|
|
* Set the string code of the bit depth based on the 'fmt ' chunk. |
460
|
|
|
* @private |
461
|
|
|
*/ |
462
|
|
|
bitDepthFromFmt_() { |
463
|
|
|
if (this.fmt.audioFormat === 3 && this.fmt.bitsPerSample === 32) { |
464
|
|
|
this.bitDepth = '32f'; |
465
|
|
|
} else if (this.fmt.audioFormat === 6) { |
466
|
|
|
this.bitDepth = '8a'; |
467
|
|
|
} else if (this.fmt.audioFormat === 7) { |
468
|
|
|
this.bitDepth = '8m'; |
469
|
|
|
} else { |
470
|
|
|
this.bitDepth = this.fmt.bitsPerSample.toString(); |
471
|
|
|
} |
472
|
|
|
} |
473
|
|
|
|
474
|
|
|
/** |
475
|
|
|
* Return a .wav file byte buffer with the data from the WaveFile object. |
476
|
|
|
* The return value of this method can be written straight to disk. |
477
|
|
|
* @return {!Uint8Array} The wav file bytes. |
478
|
|
|
* @private |
479
|
|
|
*/ |
480
|
|
|
createWaveFile_() { |
481
|
|
|
/** @type {!Array<!Array<number>>} */ |
482
|
|
|
let fileBody = [ |
483
|
|
|
this.getJunkBytes_(), |
484
|
|
|
this.getDs64Bytes_(), |
485
|
|
|
this.getBextBytes_(), |
486
|
|
|
this.getFmtBytes_(), |
487
|
|
|
this.getFactBytes_(), |
488
|
|
|
packString(this.data.chunkId), |
489
|
|
|
pack(this.data.samples.length, this.uInt32_), |
490
|
|
|
this.data.samples, |
491
|
|
|
this.getCueBytes_(), |
492
|
|
|
this.getSmplBytes_(), |
493
|
|
|
this.getLISTBytes_() |
494
|
|
|
]; |
495
|
|
|
/** @type {number} */ |
496
|
|
|
let fileBodyLength = 0; |
497
|
|
|
for (let i=0; i<fileBody.length; i++) { |
498
|
|
|
fileBodyLength += fileBody[i].length; |
499
|
|
|
} |
500
|
|
|
/** @type {!Uint8Array} */ |
501
|
|
|
let file = new Uint8Array(fileBodyLength + 12); |
502
|
|
|
/** @type {number} */ |
503
|
|
|
let index = 0; |
504
|
|
|
index = packStringTo(this.container, file, index); |
505
|
|
|
index = packTo(fileBodyLength + 4, this.uInt32_, file, index); |
506
|
|
|
index = packStringTo(this.format, file, index); |
507
|
|
|
for (let i=0; i<fileBody.length; i++) { |
508
|
|
|
file.set(fileBody[i], index); |
509
|
|
|
index += fileBody[i].length; |
510
|
|
|
} |
511
|
|
|
return file; |
512
|
|
|
} |
513
|
|
|
|
514
|
|
|
/** |
515
|
|
|
* Update the type definition used to read and write the samples. |
516
|
|
|
* @private |
517
|
|
|
*/ |
518
|
|
|
updateDataType_() { |
519
|
|
|
/** @type {!Object} */ |
520
|
|
|
this.dataType = { |
521
|
|
|
bits: ((parseInt(this.bitDepth, 10) - 1) | 7) + 1, |
522
|
|
|
float: this.bitDepth == '32f' || this.bitDepth == '64', |
523
|
|
|
signed: this.bitDepth != '8', |
524
|
|
|
be: this.container == 'RIFX' |
525
|
|
|
}; |
526
|
|
|
if (['4', '8a', '8m'].indexOf(this.bitDepth) > -1 ) { |
527
|
|
|
this.dataType.bits = 8; |
528
|
|
|
this.dataType.signed = false; |
529
|
|
|
} |
530
|
|
|
} |
531
|
|
|
|
532
|
|
|
/** |
533
|
|
|
* Set up the WaveFile object from a byte buffer. |
534
|
|
|
* @param {!Uint8Array} buffer The buffer. |
535
|
|
|
* @param {boolean=} samples True if the samples should be loaded. |
536
|
|
|
* @throws {Error} If container is not RIFF, RIFX or RF64. |
537
|
|
|
* @throws {Error} If no 'fmt ' chunk is found. |
538
|
|
|
* @throws {Error} If no 'data' chunk is found. |
539
|
|
|
*/ |
540
|
|
|
readWavBuffer(buffer, samples=true) { |
541
|
|
|
this.head_ = 0; |
542
|
|
|
this.clearHeader_(); |
543
|
|
|
this.readRIFFChunk_(buffer); |
544
|
|
|
/** @type {!Object} */ |
545
|
|
|
let chunk = riffChunks(buffer); |
546
|
|
|
this.readDs64Chunk_(buffer, chunk.subChunks); |
547
|
|
|
this.readFmtChunk_(buffer, chunk.subChunks); |
548
|
|
|
this.readFactChunk_(buffer, chunk.subChunks); |
549
|
|
|
this.readBextChunk_(buffer, chunk.subChunks); |
550
|
|
|
this.readCueChunk_(buffer, chunk.subChunks); |
551
|
|
|
this.readSmplChunk_(buffer, chunk.subChunks); |
552
|
|
|
this.readDataChunk_(buffer, chunk.subChunks, samples); |
553
|
|
|
this.readJunkChunk_(buffer, chunk.subChunks); |
554
|
|
|
this.readLISTChunk_(buffer, chunk.subChunks); |
555
|
|
|
this.bitDepthFromFmt_(); |
556
|
|
|
this.updateDataType_(); |
557
|
|
|
} |
558
|
|
|
|
559
|
|
|
/** |
560
|
|
|
* Create the header of a ADPCM wave file. |
561
|
|
|
* @param {string} bitDepthCode The audio bit depth |
562
|
|
|
* @param {number} numChannels The number of channels |
563
|
|
|
* @param {number} sampleRate The sample rate. |
564
|
|
|
* @param {number} numBytes The number of bytes each sample use. |
565
|
|
|
* @param {!Object} options The extra options, like container defintion. |
566
|
|
|
* @private |
567
|
|
|
*/ |
568
|
|
|
createADPCMHeader_(bitDepthCode, numChannels, sampleRate, numBytes, options) { |
569
|
|
|
this.createPCMHeader_( |
570
|
|
|
bitDepthCode, numChannels, sampleRate, numBytes, options); |
571
|
|
|
this.chunkSize = 40 + this.data.samples.length; |
572
|
|
|
this.fmt.chunkSize = 20; |
573
|
|
|
this.fmt.byteRate = 4055; |
574
|
|
|
this.fmt.blockAlign = 256; |
575
|
|
|
this.fmt.bitsPerSample = 4; |
576
|
|
|
this.fmt.cbSize = 2; |
577
|
|
|
this.fmt.validBitsPerSample = 505; |
578
|
|
|
this.fact.chunkId = 'fact'; |
579
|
|
|
this.fact.chunkSize = 4; |
580
|
|
|
this.fact.dwSampleLength = this.data.samples.length * 2; |
581
|
|
|
this.data.chunkSize = this.data.samples.length; |
582
|
|
|
} |
583
|
|
|
|
584
|
|
|
/** |
585
|
|
|
* Create the header of WAVE_FORMAT_EXTENSIBLE file. |
586
|
|
|
* @param {string} bitDepthCode The audio bit depth |
587
|
|
|
* @param {number} numChannels The number of channels |
588
|
|
|
* @param {number} sampleRate The sample rate. |
589
|
|
|
* @param {number} numBytes The number of bytes each sample use. |
590
|
|
|
* @param {!Object} options The extra options, like container defintion. |
591
|
|
|
* @private |
592
|
|
|
*/ |
593
|
|
|
createExtensibleHeader_( |
594
|
|
|
bitDepthCode, numChannels, sampleRate, numBytes, options) { |
595
|
|
|
this.createPCMHeader_( |
596
|
|
|
bitDepthCode, numChannels, sampleRate, numBytes, options); |
597
|
|
|
this.chunkSize = 36 + 24 + this.data.samples.length; |
598
|
|
|
this.fmt.chunkSize = 40; |
599
|
|
|
this.fmt.bitsPerSample = ((parseInt(bitDepthCode, 10) - 1) | 7) + 1; |
600
|
|
|
this.fmt.cbSize = 22; |
601
|
|
|
this.fmt.validBitsPerSample = parseInt(bitDepthCode, 10); |
602
|
|
|
this.fmt.dwChannelMask = this.getDwChannelMask_(); |
603
|
|
|
// subformat 128-bit GUID as 4 32-bit values |
604
|
|
|
// only supports uncompressed integer PCM samples |
605
|
|
|
this.fmt.subformat = [1, 1048576, 2852126848, 1905997824]; |
606
|
|
|
} |
607
|
|
|
|
608
|
|
|
/** |
609
|
|
|
* Get the value for dwChannelMask according to the number of channels. |
610
|
|
|
* @return {number} the dwChannelMask value. |
611
|
|
|
* @private |
612
|
|
|
*/ |
613
|
|
|
getDwChannelMask_() { |
614
|
|
|
/** @type {number} */ |
615
|
|
|
let dwChannelMask = 0; |
616
|
|
|
// mono = FC |
617
|
|
|
if (this.fmt.numChannels === 1) { |
618
|
|
|
dwChannelMask = 0x4; |
619
|
|
|
// stereo = FL, FR |
620
|
|
|
} else if (this.fmt.numChannels === 2) { |
621
|
|
|
dwChannelMask = 0x3; |
622
|
|
|
// quad = FL, FR, BL, BR |
623
|
|
|
} else if (this.fmt.numChannels === 4) { |
624
|
|
|
dwChannelMask = 0x33; |
625
|
|
|
// 5.1 = FL, FR, FC, LF, BL, BR |
626
|
|
|
} else if (this.fmt.numChannels === 6) { |
627
|
|
|
dwChannelMask = 0x3F; |
628
|
|
|
// 7.1 = FL, FR, FC, LF, BL, BR, SL, SR |
629
|
|
|
} else if (this.fmt.numChannels === 8) { |
630
|
|
|
dwChannelMask = 0x63F; |
631
|
|
|
} |
632
|
|
|
return dwChannelMask; |
633
|
|
|
} |
634
|
|
|
|
635
|
|
|
/** |
636
|
|
|
* Create the header of mu-Law and A-Law wave files. |
637
|
|
|
* @param {string} bitDepthCode The audio bit depth |
638
|
|
|
* @param {number} numChannels The number of channels |
639
|
|
|
* @param {number} sampleRate The sample rate. |
640
|
|
|
* @param {number} numBytes The number of bytes each sample use. |
641
|
|
|
* @param {!Object} options The extra options, like container defintion. |
642
|
|
|
* @private |
643
|
|
|
*/ |
644
|
|
|
createALawMulawHeader_( |
645
|
|
|
bitDepthCode, numChannels, sampleRate, numBytes, options) { |
646
|
|
|
this.createPCMHeader_( |
647
|
|
|
bitDepthCode, numChannels, sampleRate, numBytes, options); |
648
|
|
|
this.chunkSize = 40 + this.data.samples.length; |
649
|
|
|
this.fmt.chunkSize = 20; |
650
|
|
|
this.fmt.cbSize = 2; |
651
|
|
|
this.fmt.validBitsPerSample = 8; |
652
|
|
|
this.fact.chunkId = 'fact'; |
653
|
|
|
this.fact.chunkSize = 4; |
654
|
|
|
this.fact.dwSampleLength = this.data.samples.length; |
655
|
|
|
} |
656
|
|
|
|
657
|
|
|
/** |
658
|
|
|
* Create the header of a linear PCM wave file. |
659
|
|
|
* @param {string} bitDepthCode The audio bit depth |
660
|
|
|
* @param {number} numChannels The number of channels |
661
|
|
|
* @param {number} sampleRate The sample rate. |
662
|
|
|
* @param {number} numBytes The number of bytes each sample use. |
663
|
|
|
* @param {!Object} options The extra options, like container defintion. |
664
|
|
|
* @private |
665
|
|
|
*/ |
666
|
|
|
createPCMHeader_(bitDepthCode, numChannels, sampleRate, numBytes, options) { |
667
|
|
|
this.clearHeader_(); |
668
|
|
|
this.container = options.container; |
669
|
|
|
this.chunkSize = 36 + this.data.samples.length; |
670
|
|
|
this.format = 'WAVE'; |
671
|
|
|
this.fmt.chunkId = 'fmt '; |
672
|
|
|
this.fmt.chunkSize = 16; |
673
|
|
|
this.fmt.byteRate = (numChannels * numBytes) * sampleRate; |
674
|
|
|
this.fmt.blockAlign = numChannels * numBytes; |
675
|
|
|
this.fmt.audioFormat = this.audioFormats_[bitDepthCode] ? |
676
|
|
|
this.audioFormats_[bitDepthCode] : 65534; |
677
|
|
|
this.fmt.numChannels = numChannels; |
678
|
|
|
this.fmt.sampleRate = sampleRate; |
679
|
|
|
this.fmt.bitsPerSample = parseInt(bitDepthCode, 10); |
680
|
|
|
this.fmt.cbSize = 0; |
681
|
|
|
this.fmt.validBitsPerSample = 0; |
682
|
|
|
} |
683
|
|
|
|
684
|
|
|
/** |
685
|
|
|
* Return the closest greater number of bits for a number of bits that |
686
|
|
|
* do not fill a full sequence of bytes. |
687
|
|
|
* @param {string} bitDepthCode The bit depth. |
688
|
|
|
* @return {string} |
689
|
|
|
* @private |
690
|
|
|
*/ |
691
|
|
|
realBitDepth_(bitDepthCode) { |
692
|
|
|
if (bitDepthCode != '32f') { |
693
|
|
|
bitDepthCode = (((parseInt(bitDepthCode, 10) - 1) | 7) + 1).toString(); |
694
|
|
|
} |
695
|
|
|
return bitDepthCode; |
696
|
|
|
} |
697
|
|
|
|
698
|
|
|
/** |
699
|
|
|
* Validate the header of the file. |
700
|
|
|
* @throws {Error} If any property of the object appears invalid. |
701
|
|
|
* @private |
702
|
|
|
*/ |
703
|
|
|
validateHeader_() { |
704
|
|
|
this.validateBitDepth_(); |
705
|
|
|
this.validateNumChannels_(); |
706
|
|
|
this.validateSampleRate_(); |
707
|
|
|
} |
708
|
|
|
|
709
|
|
|
/** |
710
|
|
|
* Validate the bit depth. |
711
|
|
|
* @return {boolean} True is the bit depth is valid. |
712
|
|
|
* @throws {Error} If bit depth is invalid. |
713
|
|
|
* @private |
714
|
|
|
*/ |
715
|
|
|
validateBitDepth_() { |
716
|
|
|
if (!this.audioFormats_[this.bitDepth]) { |
717
|
|
|
if (parseInt(this.bitDepth, 10) > 8 && |
718
|
|
|
parseInt(this.bitDepth, 10) < 54) { |
719
|
|
|
return true; |
720
|
|
|
} |
721
|
|
|
throw new Error('Invalid bit depth.'); |
722
|
|
|
} |
723
|
|
|
return true; |
724
|
|
|
} |
725
|
|
|
|
726
|
|
|
/** |
727
|
|
|
* Validate the number of channels. |
728
|
|
|
* @return {boolean} True is the number of channels is valid. |
729
|
|
|
* @throws {Error} If the number of channels is invalid. |
730
|
|
|
* @private |
731
|
|
|
*/ |
732
|
|
|
validateNumChannels_() { |
733
|
|
|
/** @type {number} */ |
734
|
|
|
let blockAlign = this.fmt.numChannels * this.fmt.bitsPerSample / 8; |
735
|
|
|
if (this.fmt.numChannels < 1 || blockAlign > 65535) { |
736
|
|
|
throw new Error('Invalid number of channels.'); |
737
|
|
|
} |
738
|
|
|
return true; |
739
|
|
|
} |
740
|
|
|
|
741
|
|
|
/** |
742
|
|
|
* Validate the sample rate value. |
743
|
|
|
* @return {boolean} True is the sample rate is valid. |
744
|
|
|
* @throws {Error} If the sample rate is invalid. |
745
|
|
|
* @private |
746
|
|
|
*/ |
747
|
|
|
validateSampleRate_() { |
748
|
|
|
/** @type {number} */ |
749
|
|
|
let byteRate = this.fmt.numChannels * |
750
|
|
|
(this.fmt.bitsPerSample / 8) * this.fmt.sampleRate; |
751
|
|
|
if (this.fmt.sampleRate < 1 || byteRate > 4294967295) { |
752
|
|
|
throw new Error('Invalid sample rate.'); |
753
|
|
|
} |
754
|
|
|
return true; |
755
|
|
|
} |
756
|
|
|
|
757
|
|
|
/** |
758
|
|
|
* Reset attributes that should emptied when a file is |
759
|
|
|
* created with the fromScratch() or fromBuffer() methods. |
760
|
|
|
* @private |
761
|
|
|
*/ |
762
|
|
|
clearHeader_() { |
763
|
|
|
this.fmt.cbSize = 0; |
764
|
|
|
this.fmt.validBitsPerSample = 0; |
765
|
|
|
this.fact.chunkId = ''; |
766
|
|
|
this.ds64.chunkId = ''; |
767
|
|
|
} |
768
|
|
|
|
769
|
|
|
/** |
770
|
|
|
* Set up to work wih big-endian or little-endian files. |
771
|
|
|
* The types used are changed to LE or BE. If the |
772
|
|
|
* the file is big-endian (RIFX), true is returned. |
773
|
|
|
* @return {boolean} True if the file is RIFX. |
774
|
|
|
* @private |
775
|
|
|
*/ |
776
|
|
|
LEorBE_() { |
777
|
|
|
/** @type {boolean} */ |
778
|
|
|
let bigEndian = this.container === 'RIFX'; |
779
|
|
|
this.uInt16_.be = bigEndian; |
780
|
|
|
this.uInt32_.be = bigEndian; |
781
|
|
|
return bigEndian; |
782
|
|
|
} |
783
|
|
|
|
784
|
|
|
/** |
785
|
|
|
* Find a chunk by its fourCC_ in a array of RIFF chunks. |
786
|
|
|
* @param {!Object} chunks The wav file chunks. |
787
|
|
|
* @param {string} chunkId The chunk fourCC_. |
788
|
|
|
* @param {boolean} multiple True if there may be multiple chunks |
789
|
|
|
* with the same chunkId. |
790
|
|
|
* @return {?Array<!Object>} |
791
|
|
|
* @private |
792
|
|
|
*/ |
793
|
|
|
findChunk_(chunks, chunkId, multiple=false) { |
794
|
|
|
/** @type {!Array<!Object>} */ |
795
|
|
|
let chunk = []; |
796
|
|
|
for (let i=0; i<chunks.length; i++) { |
797
|
|
|
if (chunks[i].chunkId == chunkId) { |
798
|
|
|
if (multiple) { |
799
|
|
|
chunk.push(chunks[i]); |
800
|
|
|
} else { |
801
|
|
|
return chunks[i]; |
802
|
|
|
} |
803
|
|
|
} |
804
|
|
|
} |
805
|
|
|
if (chunkId == 'LIST') { |
806
|
|
|
return chunk.length ? chunk : null; |
807
|
|
|
} |
808
|
|
|
return null; |
809
|
|
|
} |
810
|
|
|
|
811
|
|
|
/** |
812
|
|
|
* Read the RIFF chunk a wave file. |
813
|
|
|
* @param {!Uint8Array} bytes A wav buffer. |
814
|
|
|
* @throws {Error} If no 'RIFF' chunk is found. |
815
|
|
|
* @private |
816
|
|
|
*/ |
817
|
|
|
readRIFFChunk_(bytes) { |
818
|
|
|
this.head_ = 0; |
819
|
|
|
this.container = this.readString_(bytes, 4); |
820
|
|
|
if (['RIFF', 'RIFX', 'RF64'].indexOf(this.container) === -1) { |
821
|
|
|
throw Error('Not a supported format.'); |
822
|
|
|
} |
823
|
|
|
this.LEorBE_(); |
824
|
|
|
this.chunkSize = this.read_(bytes, this.uInt32_); |
825
|
|
|
this.format = this.readString_(bytes, 4); |
826
|
|
|
if (this.format != 'WAVE') { |
827
|
|
|
throw Error('Could not find the "WAVE" format identifier'); |
828
|
|
|
} |
829
|
|
|
} |
830
|
|
|
|
831
|
|
|
/** |
832
|
|
|
* Read the 'fmt ' chunk of a wave file. |
833
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
834
|
|
|
* @param {!Object} signature The file signature. |
835
|
|
|
* @throws {Error} If no 'fmt ' chunk is found. |
836
|
|
|
* @private |
837
|
|
|
*/ |
838
|
|
|
readFmtChunk_(buffer, signature) { |
839
|
|
|
/** @type {?Object} */ |
840
|
|
|
let chunk = this.findChunk_(signature, 'fmt '); |
841
|
|
|
if (chunk) { |
842
|
|
|
this.head_ = chunk.chunkData.start; |
843
|
|
|
this.fmt.chunkId = chunk.chunkId; |
844
|
|
|
this.fmt.chunkSize = chunk.chunkSize; |
845
|
|
|
this.fmt.audioFormat = this.read_(buffer, this.uInt16_); |
846
|
|
|
this.fmt.numChannels = this.read_(buffer, this.uInt16_); |
847
|
|
|
this.fmt.sampleRate = this.read_(buffer, this.uInt32_); |
848
|
|
|
this.fmt.byteRate = this.read_(buffer, this.uInt32_); |
849
|
|
|
this.fmt.blockAlign = this.read_(buffer, this.uInt16_); |
850
|
|
|
this.fmt.bitsPerSample = this.read_(buffer, this.uInt16_); |
851
|
|
|
this.readFmtExtension_(buffer); |
852
|
|
|
} else { |
853
|
|
|
throw Error('Could not find the "fmt " chunk'); |
854
|
|
|
} |
855
|
|
|
} |
856
|
|
|
|
857
|
|
|
/** |
858
|
|
|
* Read the 'fmt ' chunk extension. |
859
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
860
|
|
|
* @private |
861
|
|
|
*/ |
862
|
|
|
readFmtExtension_(buffer) { |
863
|
|
|
if (this.fmt.chunkSize > 16) { |
864
|
|
|
this.fmt.cbSize = this.read_(buffer, this.uInt16_); |
865
|
|
|
if (this.fmt.chunkSize > 18) { |
866
|
|
|
this.fmt.validBitsPerSample = this.read_(buffer, this.uInt16_); |
867
|
|
|
if (this.fmt.chunkSize > 20) { |
868
|
|
|
this.fmt.dwChannelMask = this.read_(buffer, this.uInt32_); |
869
|
|
|
this.fmt.subformat = [ |
870
|
|
|
this.read_(buffer, this.uInt32_), |
871
|
|
|
this.read_(buffer, this.uInt32_), |
872
|
|
|
this.read_(buffer, this.uInt32_), |
873
|
|
|
this.read_(buffer, this.uInt32_)]; |
874
|
|
|
} |
875
|
|
|
} |
876
|
|
|
} |
877
|
|
|
} |
878
|
|
|
|
879
|
|
|
/** |
880
|
|
|
* Read the 'fact' chunk of a wav file. |
881
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
882
|
|
|
* @param {!Object} signature The file signature. |
883
|
|
|
* @private |
884
|
|
|
*/ |
885
|
|
|
readFactChunk_(buffer, signature) { |
886
|
|
|
/** @type {?Object} */ |
887
|
|
|
let chunk = this.findChunk_(signature, 'fact'); |
888
|
|
|
if (chunk) { |
889
|
|
|
this.head_ = chunk.chunkData.start; |
890
|
|
|
this.fact.chunkId = chunk.chunkId; |
891
|
|
|
this.fact.chunkSize = chunk.chunkSize; |
892
|
|
|
this.fact.dwSampleLength = this.read_(buffer, this.uInt32_); |
893
|
|
|
} |
894
|
|
|
} |
895
|
|
|
|
896
|
|
|
/** |
897
|
|
|
* Read the 'cue ' chunk of a wave file. |
898
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
899
|
|
|
* @param {!Object} signature The file signature. |
900
|
|
|
* @private |
901
|
|
|
*/ |
902
|
|
|
readCueChunk_(buffer, signature) { |
903
|
|
|
/** @type {?Object} */ |
904
|
|
|
let chunk = this.findChunk_(signature, 'cue '); |
905
|
|
|
if (chunk) { |
906
|
|
|
this.head_ = chunk.chunkData.start; |
907
|
|
|
this.cue.chunkId = chunk.chunkId; |
908
|
|
|
this.cue.chunkSize = chunk.chunkSize; |
909
|
|
|
this.cue.dwCuePoints = this.read_(buffer, this.uInt32_); |
910
|
|
|
for (let i=0; i<this.cue.dwCuePoints; i++) { |
911
|
|
|
this.cue.points.push({ |
912
|
|
|
dwName: this.read_(buffer, this.uInt32_), |
913
|
|
|
dwPosition: this.read_(buffer, this.uInt32_), |
914
|
|
|
fccChunk: this.readString_(buffer, 4), |
915
|
|
|
dwChunkStart: this.read_(buffer, this.uInt32_), |
916
|
|
|
dwBlockStart: this.read_(buffer, this.uInt32_), |
917
|
|
|
dwSampleOffset: this.read_(buffer, this.uInt32_), |
918
|
|
|
}); |
919
|
|
|
} |
920
|
|
|
} |
921
|
|
|
} |
922
|
|
|
|
923
|
|
|
/** |
924
|
|
|
* Read the 'smpl' chunk of a wave file. |
925
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
926
|
|
|
* @param {!Object} signature The file signature. |
927
|
|
|
* @private |
928
|
|
|
*/ |
929
|
|
|
readSmplChunk_(buffer, signature) { |
930
|
|
|
/** @type {?Object} */ |
931
|
|
|
let chunk = this.findChunk_(signature, 'smpl'); |
932
|
|
|
if (chunk) { |
933
|
|
|
this.head_ = chunk.chunkData.start; |
934
|
|
|
this.smpl.chunkId = chunk.chunkId; |
935
|
|
|
this.smpl.chunkSize = chunk.chunkSize; |
936
|
|
|
this.smpl.dwManufacturer = this.read_(buffer, this.uInt32_); |
937
|
|
|
this.smpl.dwProduct = this.read_(buffer, this.uInt32_); |
938
|
|
|
this.smpl.dwSamplePeriod = this.read_(buffer, this.uInt32_); |
939
|
|
|
this.smpl.dwMIDIUnityNote = this.read_(buffer, this.uInt32_); |
940
|
|
|
this.smpl.dwMIDIPitchFraction = this.read_(buffer, this.uInt32_); |
941
|
|
|
this.smpl.dwSMPTEFormat = this.read_(buffer, this.uInt32_); |
942
|
|
|
this.smpl.dwSMPTEOffset = this.read_(buffer, this.uInt32_); |
943
|
|
|
this.smpl.dwNumSampleLoops = this.read_(buffer, this.uInt32_); |
944
|
|
|
this.smpl.dwSamplerData = this.read_(buffer, this.uInt32_); |
945
|
|
|
for (let i=0; i<this.smpl.dwNumSampleLoops; i++) { |
946
|
|
|
this.smpl.loops.push({ |
947
|
|
|
dwName: this.read_(buffer, this.uInt32_), |
948
|
|
|
dwType: this.read_(buffer, this.uInt32_), |
949
|
|
|
dwStart: this.read_(buffer, this.uInt32_), |
950
|
|
|
dwEnd: this.read_(buffer, this.uInt32_), |
951
|
|
|
dwFraction: this.read_(buffer, this.uInt32_), |
952
|
|
|
dwPlayCount: this.read_(buffer, this.uInt32_), |
953
|
|
|
}); |
954
|
|
|
} |
955
|
|
|
} |
956
|
|
|
} |
957
|
|
|
|
958
|
|
|
/** |
959
|
|
|
* Read the 'data' chunk of a wave file. |
960
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
961
|
|
|
* @param {!Object} signature The file signature. |
962
|
|
|
* @param {boolean} samples True if the samples should be loaded. |
963
|
|
|
* @throws {Error} If no 'data' chunk is found. |
964
|
|
|
* @private |
965
|
|
|
*/ |
966
|
|
|
readDataChunk_(buffer, signature, samples) { |
967
|
|
|
/** @type {?Object} */ |
968
|
|
|
let chunk = this.findChunk_(signature, 'data'); |
969
|
|
|
if (chunk) { |
970
|
|
|
this.data.chunkId = 'data'; |
971
|
|
|
this.data.chunkSize = chunk.chunkSize; |
972
|
|
|
if (samples) { |
973
|
|
|
this.data.samples = buffer.slice( |
974
|
|
|
chunk.chunkData.start, |
975
|
|
|
chunk.chunkData.end); |
976
|
|
|
} |
977
|
|
|
} else { |
978
|
|
|
throw Error('Could not find the "data" chunk'); |
979
|
|
|
} |
980
|
|
|
} |
981
|
|
|
|
982
|
|
|
/** |
983
|
|
|
* Read the 'bext' chunk of a wav file. |
984
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
985
|
|
|
* @param {!Object} signature The file signature. |
986
|
|
|
* @private |
987
|
|
|
*/ |
988
|
|
|
readBextChunk_(buffer, signature) { |
989
|
|
|
/** @type {?Object} */ |
990
|
|
|
let chunk = this.findChunk_(signature, 'bext'); |
991
|
|
|
if (chunk) { |
992
|
|
|
this.head_ = chunk.chunkData.start; |
993
|
|
|
this.bext.chunkId = chunk.chunkId; |
994
|
|
|
this.bext.chunkSize = chunk.chunkSize; |
995
|
|
|
this.bext.description = this.readString_(buffer, 256); |
996
|
|
|
this.bext.originator = this.readString_(buffer, 32); |
997
|
|
|
this.bext.originatorReference = this.readString_(buffer, 32); |
998
|
|
|
this.bext.originationDate = this.readString_(buffer, 10); |
999
|
|
|
this.bext.originationTime = this.readString_(buffer, 8); |
1000
|
|
|
this.bext.timeReference = [ |
1001
|
|
|
this.read_(buffer, this.uInt32_), |
1002
|
|
|
this.read_(buffer, this.uInt32_)]; |
1003
|
|
|
this.bext.version = this.read_(buffer, this.uInt16_); |
1004
|
|
|
this.bext.UMID = this.readString_(buffer, 64); |
1005
|
|
|
this.bext.loudnessValue = this.read_(buffer, this.uInt16_); |
1006
|
|
|
this.bext.loudnessRange = this.read_(buffer, this.uInt16_); |
1007
|
|
|
this.bext.maxTruePeakLevel = this.read_(buffer, this.uInt16_); |
1008
|
|
|
this.bext.maxMomentaryLoudness = this.read_(buffer, this.uInt16_); |
1009
|
|
|
this.bext.maxShortTermLoudness = this.read_(buffer, this.uInt16_); |
1010
|
|
|
this.bext.reserved = this.readString_(buffer, 180); |
1011
|
|
|
this.bext.codingHistory = this.readString_( |
1012
|
|
|
buffer, this.bext.chunkSize - 602); |
1013
|
|
|
} |
1014
|
|
|
} |
1015
|
|
|
|
1016
|
|
|
/** |
1017
|
|
|
* Read the 'ds64' chunk of a wave file. |
1018
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
1019
|
|
|
* @param {!Object} signature The file signature. |
1020
|
|
|
* @throws {Error} If no 'ds64' chunk is found and the file is RF64. |
1021
|
|
|
* @private |
1022
|
|
|
*/ |
1023
|
|
|
readDs64Chunk_(buffer, signature) { |
1024
|
|
|
/** @type {?Object} */ |
1025
|
|
|
let chunk = this.findChunk_(signature, 'ds64'); |
1026
|
|
|
if (chunk) { |
1027
|
|
|
this.head_ = chunk.chunkData.start; |
1028
|
|
|
this.ds64.chunkId = chunk.chunkId; |
1029
|
|
|
this.ds64.chunkSize = chunk.chunkSize; |
1030
|
|
|
this.ds64.riffSizeHigh = this.read_(buffer, this.uInt32_); |
1031
|
|
|
this.ds64.riffSizeLow = this.read_(buffer, this.uInt32_); |
1032
|
|
|
this.ds64.dataSizeHigh = this.read_(buffer, this.uInt32_); |
1033
|
|
|
this.ds64.dataSizeLow = this.read_(buffer, this.uInt32_); |
1034
|
|
|
this.ds64.originationTime = this.read_(buffer, this.uInt32_); |
1035
|
|
|
this.ds64.sampleCountHigh = this.read_(buffer, this.uInt32_); |
1036
|
|
|
this.ds64.sampleCountLow = this.read_(buffer, this.uInt32_); |
1037
|
|
|
//if (this.ds64.chunkSize > 28) { |
1038
|
|
|
// this.ds64.tableLength = unpack( |
1039
|
|
|
// chunkData.slice(28, 32), this.uInt32_); |
1040
|
|
|
// this.ds64.table = chunkData.slice( |
1041
|
|
|
// 32, 32 + this.ds64.tableLength); |
1042
|
|
|
//} |
1043
|
|
|
} else { |
1044
|
|
|
if (this.container == 'RF64') { |
1045
|
|
|
throw Error('Could not find the "ds64" chunk'); |
1046
|
|
|
} |
1047
|
|
|
} |
1048
|
|
|
} |
1049
|
|
|
|
1050
|
|
|
/** |
1051
|
|
|
* Read the 'LIST' chunks of a wave file. |
1052
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
1053
|
|
|
* @param {!Object} signature The file signature. |
1054
|
|
|
* @private |
1055
|
|
|
*/ |
1056
|
|
|
readLISTChunk_(buffer, signature) { |
1057
|
|
|
/** @type {?Object} */ |
1058
|
|
|
let listChunks = this.findChunk_(signature, 'LIST', true); |
1059
|
|
|
if (listChunks === null) { |
1060
|
|
|
return; |
1061
|
|
|
} |
1062
|
|
|
for (let j=0; j < listChunks.length; j++) { |
1063
|
|
|
/** @type {!Object} */ |
1064
|
|
|
let subChunk = listChunks[j]; |
1065
|
|
|
this.LIST.push({ |
1066
|
|
|
chunkId: subChunk.chunkId, |
1067
|
|
|
chunkSize: subChunk.chunkSize, |
1068
|
|
|
format: subChunk.format, |
1069
|
|
|
subChunks: []}); |
1070
|
|
|
for (let x=0; x<subChunk.subChunks.length; x++) { |
1071
|
|
|
this.readLISTSubChunks_(subChunk.subChunks[x], |
1072
|
|
|
subChunk.format, buffer); |
1073
|
|
|
} |
1074
|
|
|
} |
1075
|
|
|
} |
1076
|
|
|
|
1077
|
|
|
/** |
1078
|
|
|
* Read the sub chunks of a 'LIST' chunk. |
1079
|
|
|
* @param {!Object} subChunk The 'LIST' subchunks. |
1080
|
|
|
* @param {string} format The 'LIST' format, 'adtl' or 'INFO'. |
1081
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
1082
|
|
|
* @private |
1083
|
|
|
*/ |
1084
|
|
|
readLISTSubChunks_(subChunk, format, buffer) { |
1085
|
|
|
if (format == 'adtl') { |
1086
|
|
|
if (['labl', 'note','ltxt'].indexOf(subChunk.chunkId) > -1) { |
1087
|
|
|
this.head_ = subChunk.chunkData.start; |
1088
|
|
|
/** @type {!Object<string, string|number>} */ |
1089
|
|
|
let item = { |
1090
|
|
|
chunkId: subChunk.chunkId, |
1091
|
|
|
chunkSize: subChunk.chunkSize, |
1092
|
|
|
dwName: this.read_(buffer, this.uInt32_) |
1093
|
|
|
}; |
1094
|
|
|
if (subChunk.chunkId == 'ltxt') { |
1095
|
|
|
item.dwSampleLength = this.read_(buffer, this.uInt32_); |
1096
|
|
|
item.dwPurposeID = this.read_(buffer, this.uInt32_); |
1097
|
|
|
item.dwCountry = this.read_(buffer, this.uInt16_); |
1098
|
|
|
item.dwLanguage = this.read_(buffer, this.uInt16_); |
1099
|
|
|
item.dwDialect = this.read_(buffer, this.uInt16_); |
1100
|
|
|
item.dwCodePage = this.read_(buffer, this.uInt16_); |
1101
|
|
|
} |
1102
|
|
|
item.value = this.readZSTR_(buffer, this.head_); |
1103
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push(item); |
1104
|
|
|
} |
1105
|
|
|
// RIFF INFO tags like ICRD, ISFT, ICMT |
1106
|
|
|
} else if(format == 'INFO') { |
1107
|
|
|
this.head_ = subChunk.chunkData.start; |
1108
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push({ |
1109
|
|
|
chunkId: subChunk.chunkId, |
1110
|
|
|
chunkSize: subChunk.chunkSize, |
1111
|
|
|
value: this.readZSTR_(buffer, this.head_) |
1112
|
|
|
}); |
1113
|
|
|
} |
1114
|
|
|
} |
1115
|
|
|
|
1116
|
|
|
/** |
1117
|
|
|
* Read the 'junk' chunk of a wave file. |
1118
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
1119
|
|
|
* @param {!Object} signature The file signature. |
1120
|
|
|
* @private |
1121
|
|
|
*/ |
1122
|
|
|
readJunkChunk_(buffer, signature) { |
1123
|
|
|
/** @type {?Object} */ |
1124
|
|
|
let chunk = this.findChunk_(signature, 'junk'); |
1125
|
|
|
if (chunk) { |
1126
|
|
|
this.junk = { |
1127
|
|
|
chunkId: chunk.chunkId, |
1128
|
|
|
chunkSize: chunk.chunkSize, |
1129
|
|
|
chunkData: [].slice.call(buffer.slice( |
1130
|
|
|
chunk.chunkData.start, |
1131
|
|
|
chunk.chunkData.end)) |
1132
|
|
|
}; |
1133
|
|
|
} |
1134
|
|
|
} |
1135
|
|
|
|
1136
|
|
|
/** |
1137
|
|
|
* Read bytes as a ZSTR string. |
1138
|
|
|
* @param {!Uint8Array} bytes The bytes. |
1139
|
|
|
* @return {string} The string. |
1140
|
|
|
* @private |
1141
|
|
|
*/ |
1142
|
|
|
readZSTR_(bytes, index=0) { |
1143
|
|
|
/** @type {string} */ |
1144
|
|
|
let str = ''; |
1145
|
|
|
for (let i=index; i<bytes.length; i++) { |
1146
|
|
|
this.head_++; |
1147
|
|
|
if (bytes[i] === 0) { |
1148
|
|
|
break; |
1149
|
|
|
} |
1150
|
|
|
str += unpackString(bytes, i, 1); |
1151
|
|
|
} |
1152
|
|
|
return str; |
1153
|
|
|
} |
1154
|
|
|
|
1155
|
|
|
/** |
1156
|
|
|
* Read bytes as a string from a RIFF chunk. |
1157
|
|
|
* @param {!Uint8Array} bytes The bytes. |
1158
|
|
|
* @param {number} maxSize the max size of the string. |
1159
|
|
|
* @return {string} The string. |
1160
|
|
|
* @private |
1161
|
|
|
*/ |
1162
|
|
|
readString_(bytes, maxSize) { |
1163
|
|
|
/** @type {string} */ |
1164
|
|
|
let str = ''; |
1165
|
|
|
for (let i=0; i<maxSize; i++) { |
1166
|
|
|
str += unpackString(bytes, this.head_, 1); |
1167
|
|
|
this.head_++; |
1168
|
|
|
} |
1169
|
|
|
return str; |
1170
|
|
|
} |
1171
|
|
|
|
1172
|
|
|
/** |
1173
|
|
|
* Read a number from a chunk. |
1174
|
|
|
* @param {!Uint8Array} bytes The chunk bytes. |
1175
|
|
|
* @param {!Object} bdType The type definition. |
1176
|
|
|
* @return {number} The number. |
1177
|
|
|
* @private |
1178
|
|
|
*/ |
1179
|
|
|
read_(bytes, bdType) { |
1180
|
|
|
/** @type {number} */ |
1181
|
|
|
let size = bdType.bits / 8; |
1182
|
|
|
/** @type {number} */ |
1183
|
|
|
let value = unpackFrom(bytes, bdType, this.head_); |
1184
|
|
|
this.head_ += size; |
1185
|
|
|
return value; |
1186
|
|
|
} |
1187
|
|
|
|
1188
|
|
|
|
1189
|
|
|
/** |
1190
|
|
|
* Truncate float samples on over and underflow. |
1191
|
|
|
* @private |
1192
|
|
|
*/ |
1193
|
|
|
truncateSamples(samples) { |
1194
|
|
|
if (this.fmt.audioFormat === 3) { |
1195
|
|
|
/** @type {number} */ |
1196
|
|
|
let len = samples.length; |
1197
|
|
|
for (let i=0; i<len; i++) { |
1198
|
|
|
if (samples[i] > 1) { |
1199
|
|
|
samples[i] = 1; |
1200
|
|
|
} else if (samples[i] < -1) { |
1201
|
|
|
samples[i] = -1; |
1202
|
|
|
} |
1203
|
|
|
} |
1204
|
|
|
} |
1205
|
|
|
} |
1206
|
|
|
} |
1207
|
|
|
|