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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, packStringTo, packTo, packString,} from '../vendor/byte-data.js'; |
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// @type {BufferIO} |
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import BufferIO from './bufferio.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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* @type {!Object} |
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* @private |
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*/ |
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this.dataType = {}; |
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this.io = new BufferIO(); |
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} |
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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.io.writeString_(this.bext.description, 256), |
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this.io.writeString_(this.bext.originator, 32), |
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this.io.writeString_(this.bext.originatorReference, 32), |
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this.io.writeString_(this.bext.originationDate, 10), |
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this.io.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.io.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.io.writeString_(this.bext.reserved, 180), |
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this.io.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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} |
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255
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/** |
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256
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* Return the bytes of the 'fmt ' chunk. |
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257
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* @return {!Array<number>} The 'fmt' chunk bytes. |
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258
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* @throws {Error} if no 'fmt ' chunk is present. |
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* @private |
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260
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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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274
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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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278
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279
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/** |
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280
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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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283
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*/ |
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284
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getFmtExtensionBytes_() { |
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285
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/** @type {!Array<number>} */ |
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286
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let extension = []; |
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287
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if (this.fmt.chunkSize > 16) { |
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288
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extension = extension.concat( |
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pack(this.fmt.cbSize, this.uInt16_)); |
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290
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} |
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291
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if (this.fmt.chunkSize > 18) { |
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292
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extension = extension.concat( |
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293
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pack(this.fmt.validBitsPerSample, this.uInt16_)); |
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294
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} |
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295
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if (this.fmt.chunkSize > 20) { |
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296
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extension = extension.concat( |
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297
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pack(this.fmt.dwChannelMask, this.uInt32_)); |
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298
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} |
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299
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if (this.fmt.chunkSize > 24) { |
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300
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extension = extension.concat( |
|
301
|
|
|
pack(this.fmt.subformat[0], this.uInt32_), |
|
302
|
|
|
pack(this.fmt.subformat[1], this.uInt32_), |
|
303
|
|
|
pack(this.fmt.subformat[2], this.uInt32_), |
|
304
|
|
|
pack(this.fmt.subformat[3], this.uInt32_)); |
|
305
|
|
|
} |
|
306
|
|
|
return extension; |
|
307
|
|
|
} |
|
308
|
|
|
|
|
309
|
|
|
/** |
|
310
|
|
|
* Return the bytes of the 'LIST' chunk. |
|
311
|
|
|
* @return {!Array<number>} The 'LIST' chunk bytes. |
|
312
|
|
|
*/ |
|
313
|
|
|
getLISTBytes_() { |
|
314
|
|
|
/** @type {!Array<number>} */ |
|
315
|
|
|
let bytes = []; |
|
316
|
|
|
for (let i=0; i<this.LIST.length; i++) { |
|
317
|
|
|
/** @type {!Array<number>} */ |
|
318
|
|
|
let subChunksBytes = this.getLISTSubChunksBytes_( |
|
319
|
|
|
this.LIST[i].subChunks, this.LIST[i].format); |
|
320
|
|
|
bytes = bytes.concat( |
|
321
|
|
|
packString(this.LIST[i].chunkId), |
|
322
|
|
|
pack(subChunksBytes.length + 4, this.uInt32_), |
|
323
|
|
|
packString(this.LIST[i].format), |
|
324
|
|
|
subChunksBytes); |
|
325
|
|
|
} |
|
326
|
|
|
return bytes; |
|
327
|
|
|
} |
|
328
|
|
|
|
|
329
|
|
|
/** |
|
330
|
|
|
* Return the bytes of the sub chunks of a 'LIST' chunk. |
|
331
|
|
|
* @param {!Array<!Object>} subChunks The 'LIST' sub chunks. |
|
332
|
|
|
* @param {string} format The format of the 'LIST' chunk. |
|
333
|
|
|
* Currently supported values are 'adtl' or 'INFO'. |
|
334
|
|
|
* @return {!Array<number>} The sub chunk bytes. |
|
335
|
|
|
* @private |
|
336
|
|
|
*/ |
|
337
|
|
|
getLISTSubChunksBytes_(subChunks, format) { |
|
338
|
|
|
/** @type {!Array<number>} */ |
|
339
|
|
|
let bytes = []; |
|
340
|
|
|
for (let i=0; i<subChunks.length; i++) { |
|
341
|
|
|
if (format == 'INFO') { |
|
342
|
|
|
bytes = bytes.concat( |
|
343
|
|
|
packString(subChunks[i].chunkId), |
|
344
|
|
|
pack(subChunks[i].value.length + 1, this.uInt32_), |
|
345
|
|
|
this.io.writeString_( |
|
346
|
|
|
subChunks[i].value, subChunks[i].value.length)); |
|
347
|
|
|
bytes.push(0); |
|
348
|
|
|
} else if (format == 'adtl') { |
|
349
|
|
|
if (['labl', 'note'].indexOf(subChunks[i].chunkId) > -1) { |
|
350
|
|
|
bytes = bytes.concat( |
|
351
|
|
|
packString(subChunks[i].chunkId), |
|
352
|
|
|
pack( |
|
353
|
|
|
subChunks[i].value.length + 4 + 1, this.uInt32_), |
|
354
|
|
|
pack(subChunks[i].dwName, this.uInt32_), |
|
355
|
|
|
this.io.writeString_( |
|
356
|
|
|
subChunks[i].value, |
|
357
|
|
|
subChunks[i].value.length)); |
|
358
|
|
|
bytes.push(0); |
|
359
|
|
|
} else if (subChunks[i].chunkId == 'ltxt') { |
|
360
|
|
|
bytes = bytes.concat( |
|
361
|
|
|
this.getLtxtChunkBytes_(subChunks[i])); |
|
362
|
|
|
} |
|
363
|
|
|
} |
|
364
|
|
|
if (bytes.length % 2) { |
|
365
|
|
|
bytes.push(0); |
|
366
|
|
|
} |
|
367
|
|
|
} |
|
368
|
|
|
return bytes; |
|
369
|
|
|
} |
|
370
|
|
|
|
|
371
|
|
|
/** |
|
372
|
|
|
* Return the bytes of a 'ltxt' chunk. |
|
373
|
|
|
* @param {!Object} ltxt the 'ltxt' chunk. |
|
374
|
|
|
* @return {!Array<number>} The 'ltxt' chunk bytes. |
|
375
|
|
|
* @private |
|
376
|
|
|
*/ |
|
377
|
|
|
getLtxtChunkBytes_(ltxt) { |
|
378
|
|
|
return [].concat( |
|
379
|
|
|
packString(ltxt.chunkId), |
|
380
|
|
|
pack(ltxt.value.length + 20, this.uInt32_), |
|
381
|
|
|
pack(ltxt.dwName, this.uInt32_), |
|
382
|
|
|
pack(ltxt.dwSampleLength, this.uInt32_), |
|
383
|
|
|
pack(ltxt.dwPurposeID, this.uInt32_), |
|
384
|
|
|
pack(ltxt.dwCountry, this.uInt16_), |
|
385
|
|
|
pack(ltxt.dwLanguage, this.uInt16_), |
|
386
|
|
|
pack(ltxt.dwDialect, this.uInt16_), |
|
387
|
|
|
pack(ltxt.dwCodePage, this.uInt16_), |
|
388
|
|
|
this.io.writeString_(ltxt.value, ltxt.value.length)); |
|
389
|
|
|
} |
|
390
|
|
|
|
|
391
|
|
|
/** |
|
392
|
|
|
* Return the bytes of the 'junk' chunk. |
|
393
|
|
|
* @return {!Array<number>} The 'junk' chunk bytes. |
|
394
|
|
|
* @private |
|
395
|
|
|
*/ |
|
396
|
|
|
getJunkBytes_() { |
|
397
|
|
|
/** @type {!Array<number>} */ |
|
398
|
|
|
let bytes = []; |
|
399
|
|
|
if (this.junk.chunkId) { |
|
400
|
|
|
return bytes.concat( |
|
401
|
|
|
packString(this.junk.chunkId), |
|
402
|
|
|
pack(this.junk.chunkData.length, this.uInt32_), |
|
403
|
|
|
this.junk.chunkData); |
|
404
|
|
|
} |
|
405
|
|
|
return bytes; |
|
406
|
|
|
} |
|
407
|
|
|
|
|
408
|
|
|
/** |
|
409
|
|
|
* Return 'RIFF' if the container is 'RF64', the current container name |
|
410
|
|
|
* otherwise. Used to enforce 'RIFF' when RF64 is not allowed. |
|
411
|
|
|
* @return {string} |
|
412
|
|
|
* @private |
|
413
|
|
|
*/ |
|
414
|
|
|
correctContainer_() { |
|
415
|
|
|
return this.container == 'RF64' ? 'RIFF' : this.container; |
|
416
|
|
|
} |
|
417
|
|
|
|
|
418
|
|
|
/** |
|
419
|
|
|
* Set the string code of the bit depth based on the 'fmt ' chunk. |
|
420
|
|
|
* @private |
|
421
|
|
|
*/ |
|
422
|
|
|
bitDepthFromFmt_() { |
|
423
|
|
|
if (this.fmt.audioFormat === 3 && this.fmt.bitsPerSample === 32) { |
|
424
|
|
|
this.bitDepth = '32f'; |
|
425
|
|
|
} else if (this.fmt.audioFormat === 6) { |
|
426
|
|
|
this.bitDepth = '8a'; |
|
427
|
|
|
} else if (this.fmt.audioFormat === 7) { |
|
428
|
|
|
this.bitDepth = '8m'; |
|
429
|
|
|
} else { |
|
430
|
|
|
this.bitDepth = this.fmt.bitsPerSample.toString(); |
|
431
|
|
|
} |
|
432
|
|
|
} |
|
433
|
|
|
|
|
434
|
|
|
/** |
|
435
|
|
|
* Return a .wav file byte buffer with the data from the WaveFile object. |
|
436
|
|
|
* The return value of this method can be written straight to disk. |
|
437
|
|
|
* @return {!Uint8Array} The wav file bytes. |
|
438
|
|
|
* @private |
|
439
|
|
|
*/ |
|
440
|
|
|
createWaveFile_() { |
|
441
|
|
|
/** @type {!Array<!Array<number>>} */ |
|
442
|
|
|
let fileBody = [ |
|
443
|
|
|
this.getJunkBytes_(), |
|
444
|
|
|
this.getDs64Bytes_(), |
|
445
|
|
|
this.getBextBytes_(), |
|
446
|
|
|
this.getFmtBytes_(), |
|
447
|
|
|
this.getFactBytes_(), |
|
448
|
|
|
packString(this.data.chunkId), |
|
449
|
|
|
pack(this.data.samples.length, this.uInt32_), |
|
450
|
|
|
this.data.samples, |
|
451
|
|
|
this.getCueBytes_(), |
|
452
|
|
|
this.getSmplBytes_(), |
|
453
|
|
|
this.getLISTBytes_() |
|
454
|
|
|
]; |
|
455
|
|
|
/** @type {number} */ |
|
456
|
|
|
let fileBodyLength = 0; |
|
457
|
|
|
for (let i=0; i<fileBody.length; i++) { |
|
458
|
|
|
fileBodyLength += fileBody[i].length; |
|
459
|
|
|
} |
|
460
|
|
|
/** @type {!Uint8Array} */ |
|
461
|
|
|
let file = new Uint8Array(fileBodyLength + 12); |
|
462
|
|
|
/** @type {number} */ |
|
463
|
|
|
let index = 0; |
|
464
|
|
|
index = packStringTo(this.container, file, index); |
|
465
|
|
|
index = packTo(fileBodyLength + 4, this.uInt32_, file, index); |
|
466
|
|
|
index = packStringTo(this.format, file, index); |
|
467
|
|
|
for (let i=0; i<fileBody.length; i++) { |
|
468
|
|
|
file.set(fileBody[i], index); |
|
469
|
|
|
index += fileBody[i].length; |
|
470
|
|
|
} |
|
471
|
|
|
return file; |
|
472
|
|
|
} |
|
473
|
|
|
|
|
474
|
|
|
/** |
|
475
|
|
|
* Update the type definition used to read and write the samples. |
|
476
|
|
|
* @private |
|
477
|
|
|
*/ |
|
478
|
|
|
updateDataType_() { |
|
479
|
|
|
/** @type {!Object} */ |
|
480
|
|
|
this.dataType = { |
|
481
|
|
|
bits: ((parseInt(this.bitDepth, 10) - 1) | 7) + 1, |
|
482
|
|
|
float: this.bitDepth == '32f' || this.bitDepth == '64', |
|
483
|
|
|
signed: this.bitDepth != '8', |
|
484
|
|
|
be: this.container == 'RIFX' |
|
485
|
|
|
}; |
|
486
|
|
|
if (['4', '8a', '8m'].indexOf(this.bitDepth) > -1 ) { |
|
487
|
|
|
this.dataType.bits = 8; |
|
488
|
|
|
this.dataType.signed = false; |
|
489
|
|
|
} |
|
490
|
|
|
} |
|
491
|
|
|
|
|
492
|
|
|
/** |
|
493
|
|
|
* Set up the WaveFile object from a byte buffer. |
|
494
|
|
|
* @param {!Uint8Array} buffer The buffer. |
|
495
|
|
|
* @param {boolean=} samples True if the samples should be loaded. |
|
496
|
|
|
* @throws {Error} If container is not RIFF, RIFX or RF64. |
|
497
|
|
|
* @throws {Error} If no 'fmt ' chunk is found. |
|
498
|
|
|
* @throws {Error} If no 'data' chunk is found. |
|
499
|
|
|
*/ |
|
500
|
|
|
readWavBuffer(buffer, samples=true) { |
|
501
|
|
|
this.io.head_ = 0; |
|
502
|
|
|
this.clearHeader_(); |
|
503
|
|
|
this.readRIFFChunk_(buffer); |
|
504
|
|
|
/** @type {!Object} */ |
|
505
|
|
|
let chunk = riffChunks(buffer); |
|
506
|
|
|
this.readDs64Chunk_(buffer, chunk.subChunks); |
|
507
|
|
|
this.readFmtChunk_(buffer, chunk.subChunks); |
|
508
|
|
|
this.readFactChunk_(buffer, chunk.subChunks); |
|
509
|
|
|
this.readBextChunk_(buffer, chunk.subChunks); |
|
510
|
|
|
this.readCueChunk_(buffer, chunk.subChunks); |
|
511
|
|
|
this.readSmplChunk_(buffer, chunk.subChunks); |
|
512
|
|
|
this.readDataChunk_(buffer, chunk.subChunks, samples); |
|
513
|
|
|
this.readJunkChunk_(buffer, chunk.subChunks); |
|
514
|
|
|
this.readLISTChunk_(buffer, chunk.subChunks); |
|
515
|
|
|
this.bitDepthFromFmt_(); |
|
516
|
|
|
this.updateDataType_(); |
|
517
|
|
|
} |
|
518
|
|
|
|
|
519
|
|
|
/** |
|
520
|
|
|
* Return the closest greater number of bits for a number of bits that |
|
521
|
|
|
* do not fill a full sequence of bytes. |
|
522
|
|
|
* @param {string} bitDepthCode The bit depth. |
|
523
|
|
|
* @return {string} |
|
524
|
|
|
* @private |
|
525
|
|
|
*/ |
|
526
|
|
|
realBitDepth_(bitDepthCode) { |
|
527
|
|
|
if (bitDepthCode != '32f') { |
|
528
|
|
|
bitDepthCode = (((parseInt(bitDepthCode, 10) - 1) | 7) + 1).toString(); |
|
529
|
|
|
} |
|
530
|
|
|
return bitDepthCode; |
|
531
|
|
|
} |
|
532
|
|
|
|
|
533
|
|
|
/** |
|
534
|
|
|
* Reset attributes that should emptied when a file is |
|
535
|
|
|
* created with the fromScratch() or fromBuffer() methods. |
|
536
|
|
|
* @private |
|
537
|
|
|
*/ |
|
538
|
|
|
clearHeader_() { |
|
539
|
|
|
this.fmt.cbSize = 0; |
|
540
|
|
|
this.fmt.validBitsPerSample = 0; |
|
541
|
|
|
this.fact.chunkId = ''; |
|
542
|
|
|
this.ds64.chunkId = ''; |
|
543
|
|
|
} |
|
544
|
|
|
|
|
545
|
|
|
/** |
|
546
|
|
|
* Set up to work wih big-endian or little-endian files. |
|
547
|
|
|
* The types used are changed to LE or BE. If the |
|
548
|
|
|
* the file is big-endian (RIFX), true is returned. |
|
549
|
|
|
* @return {boolean} True if the file is RIFX. |
|
550
|
|
|
* @private |
|
551
|
|
|
*/ |
|
552
|
|
|
LEorBE_() { |
|
553
|
|
|
/** @type {boolean} */ |
|
554
|
|
|
let bigEndian = this.container === 'RIFX'; |
|
555
|
|
|
this.uInt16_.be = bigEndian; |
|
556
|
|
|
this.uInt32_.be = bigEndian; |
|
557
|
|
|
return bigEndian; |
|
558
|
|
|
} |
|
559
|
|
|
|
|
560
|
|
|
/** |
|
561
|
|
|
* Find a chunk by its fourCC_ in a array of RIFF chunks. |
|
562
|
|
|
* @param {!Object} chunks The wav file chunks. |
|
563
|
|
|
* @param {string} chunkId The chunk fourCC_. |
|
564
|
|
|
* @param {boolean} multiple True if there may be multiple chunks |
|
565
|
|
|
* with the same chunkId. |
|
566
|
|
|
* @return {?Array<!Object>} |
|
567
|
|
|
* @private |
|
568
|
|
|
*/ |
|
569
|
|
|
findChunk_(chunks, chunkId, multiple=false) { |
|
570
|
|
|
/** @type {!Array<!Object>} */ |
|
571
|
|
|
let chunk = []; |
|
572
|
|
|
for (let i=0; i<chunks.length; i++) { |
|
573
|
|
|
if (chunks[i].chunkId == chunkId) { |
|
574
|
|
|
if (multiple) { |
|
575
|
|
|
chunk.push(chunks[i]); |
|
576
|
|
|
} else { |
|
577
|
|
|
return chunks[i]; |
|
578
|
|
|
} |
|
579
|
|
|
} |
|
580
|
|
|
} |
|
581
|
|
|
if (chunkId == 'LIST') { |
|
582
|
|
|
return chunk.length ? chunk : null; |
|
583
|
|
|
} |
|
584
|
|
|
return null; |
|
585
|
|
|
} |
|
586
|
|
|
|
|
587
|
|
|
/** |
|
588
|
|
|
* Read the RIFF chunk a wave file. |
|
589
|
|
|
* @param {!Uint8Array} bytes A wav buffer. |
|
590
|
|
|
* @throws {Error} If no 'RIFF' chunk is found. |
|
591
|
|
|
* @private |
|
592
|
|
|
*/ |
|
593
|
|
|
readRIFFChunk_(bytes) { |
|
594
|
|
|
this.io.head_ = 0; |
|
595
|
|
|
this.container = this.io.readString_(bytes, 4); |
|
596
|
|
|
if (['RIFF', 'RIFX', 'RF64'].indexOf(this.container) === -1) { |
|
597
|
|
|
throw Error('Not a supported format.'); |
|
598
|
|
|
} |
|
599
|
|
|
this.LEorBE_(); |
|
600
|
|
|
this.chunkSize = this.io.read_(bytes, this.uInt32_); |
|
601
|
|
|
this.format = this.io.readString_(bytes, 4); |
|
602
|
|
|
if (this.format != 'WAVE') { |
|
603
|
|
|
throw Error('Could not find the "WAVE" format identifier'); |
|
604
|
|
|
} |
|
605
|
|
|
} |
|
606
|
|
|
|
|
607
|
|
|
/** |
|
608
|
|
|
* Read the 'fmt ' chunk of a wave file. |
|
609
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
610
|
|
|
* @param {!Object} signature The file signature. |
|
611
|
|
|
* @throws {Error} If no 'fmt ' chunk is found. |
|
612
|
|
|
* @private |
|
613
|
|
|
*/ |
|
614
|
|
|
readFmtChunk_(buffer, signature) { |
|
615
|
|
|
/** @type {?Object} */ |
|
616
|
|
|
let chunk = this.findChunk_(signature, 'fmt '); |
|
617
|
|
|
if (chunk) { |
|
618
|
|
|
this.io.head_ = chunk.chunkData.start; |
|
619
|
|
|
this.fmt.chunkId = chunk.chunkId; |
|
620
|
|
|
this.fmt.chunkSize = chunk.chunkSize; |
|
621
|
|
|
this.fmt.audioFormat = this.io.read_(buffer, this.uInt16_); |
|
622
|
|
|
this.fmt.numChannels = this.io.read_(buffer, this.uInt16_); |
|
623
|
|
|
this.fmt.sampleRate = this.io.read_(buffer, this.uInt32_); |
|
624
|
|
|
this.fmt.byteRate = this.io.read_(buffer, this.uInt32_); |
|
625
|
|
|
this.fmt.blockAlign = this.io.read_(buffer, this.uInt16_); |
|
626
|
|
|
this.fmt.bitsPerSample = this.io.read_(buffer, this.uInt16_); |
|
627
|
|
|
this.readFmtExtension_(buffer); |
|
628
|
|
|
} else { |
|
629
|
|
|
throw Error('Could not find the "fmt " chunk'); |
|
630
|
|
|
} |
|
631
|
|
|
} |
|
632
|
|
|
|
|
633
|
|
|
/** |
|
634
|
|
|
* Read the 'fmt ' chunk extension. |
|
635
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
636
|
|
|
* @private |
|
637
|
|
|
*/ |
|
638
|
|
|
readFmtExtension_(buffer) { |
|
639
|
|
|
if (this.fmt.chunkSize > 16) { |
|
640
|
|
|
this.fmt.cbSize = this.io.read_(buffer, this.uInt16_); |
|
641
|
|
|
if (this.fmt.chunkSize > 18) { |
|
642
|
|
|
this.fmt.validBitsPerSample = this.io.read_(buffer, this.uInt16_); |
|
643
|
|
|
if (this.fmt.chunkSize > 20) { |
|
644
|
|
|
this.fmt.dwChannelMask = this.io.read_(buffer, this.uInt32_); |
|
645
|
|
|
this.fmt.subformat = [ |
|
646
|
|
|
this.io.read_(buffer, this.uInt32_), |
|
647
|
|
|
this.io.read_(buffer, this.uInt32_), |
|
648
|
|
|
this.io.read_(buffer, this.uInt32_), |
|
649
|
|
|
this.io.read_(buffer, this.uInt32_)]; |
|
650
|
|
|
} |
|
651
|
|
|
} |
|
652
|
|
|
} |
|
653
|
|
|
} |
|
654
|
|
|
|
|
655
|
|
|
/** |
|
656
|
|
|
* Read the 'fact' chunk of a wav file. |
|
657
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
658
|
|
|
* @param {!Object} signature The file signature. |
|
659
|
|
|
* @private |
|
660
|
|
|
*/ |
|
661
|
|
|
readFactChunk_(buffer, signature) { |
|
662
|
|
|
/** @type {?Object} */ |
|
663
|
|
|
let chunk = this.findChunk_(signature, 'fact'); |
|
664
|
|
|
if (chunk) { |
|
665
|
|
|
this.io.head_ = chunk.chunkData.start; |
|
666
|
|
|
this.fact.chunkId = chunk.chunkId; |
|
667
|
|
|
this.fact.chunkSize = chunk.chunkSize; |
|
668
|
|
|
this.fact.dwSampleLength = this.io.read_(buffer, this.uInt32_); |
|
669
|
|
|
} |
|
670
|
|
|
} |
|
671
|
|
|
|
|
672
|
|
|
/** |
|
673
|
|
|
* Read the 'cue ' chunk of a wave file. |
|
674
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
675
|
|
|
* @param {!Object} signature The file signature. |
|
676
|
|
|
* @private |
|
677
|
|
|
*/ |
|
678
|
|
|
readCueChunk_(buffer, signature) { |
|
679
|
|
|
/** @type {?Object} */ |
|
680
|
|
|
let chunk = this.findChunk_(signature, 'cue '); |
|
681
|
|
|
if (chunk) { |
|
682
|
|
|
this.io.head_ = chunk.chunkData.start; |
|
683
|
|
|
this.cue.chunkId = chunk.chunkId; |
|
684
|
|
|
this.cue.chunkSize = chunk.chunkSize; |
|
685
|
|
|
this.cue.dwCuePoints = this.io.read_(buffer, this.uInt32_); |
|
686
|
|
|
for (let i=0; i<this.cue.dwCuePoints; i++) { |
|
687
|
|
|
this.cue.points.push({ |
|
688
|
|
|
dwName: this.io.read_(buffer, this.uInt32_), |
|
689
|
|
|
dwPosition: this.io.read_(buffer, this.uInt32_), |
|
690
|
|
|
fccChunk: this.io.readString_(buffer, 4), |
|
691
|
|
|
dwChunkStart: this.io.read_(buffer, this.uInt32_), |
|
692
|
|
|
dwBlockStart: this.io.read_(buffer, this.uInt32_), |
|
693
|
|
|
dwSampleOffset: this.io.read_(buffer, this.uInt32_), |
|
694
|
|
|
}); |
|
695
|
|
|
} |
|
696
|
|
|
} |
|
697
|
|
|
} |
|
698
|
|
|
|
|
699
|
|
|
/** |
|
700
|
|
|
* Read the 'smpl' chunk of a wave file. |
|
701
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
702
|
|
|
* @param {!Object} signature The file signature. |
|
703
|
|
|
* @private |
|
704
|
|
|
*/ |
|
705
|
|
|
readSmplChunk_(buffer, signature) { |
|
706
|
|
|
/** @type {?Object} */ |
|
707
|
|
|
let chunk = this.findChunk_(signature, 'smpl'); |
|
708
|
|
|
if (chunk) { |
|
709
|
|
|
this.io.head_ = chunk.chunkData.start; |
|
710
|
|
|
this.smpl.chunkId = chunk.chunkId; |
|
711
|
|
|
this.smpl.chunkSize = chunk.chunkSize; |
|
712
|
|
|
this.smpl.dwManufacturer = this.io.read_(buffer, this.uInt32_); |
|
713
|
|
|
this.smpl.dwProduct = this.io.read_(buffer, this.uInt32_); |
|
714
|
|
|
this.smpl.dwSamplePeriod = this.io.read_(buffer, this.uInt32_); |
|
715
|
|
|
this.smpl.dwMIDIUnityNote = this.io.read_(buffer, this.uInt32_); |
|
716
|
|
|
this.smpl.dwMIDIPitchFraction = this.io.read_(buffer, this.uInt32_); |
|
717
|
|
|
this.smpl.dwSMPTEFormat = this.io.read_(buffer, this.uInt32_); |
|
718
|
|
|
this.smpl.dwSMPTEOffset = this.io.read_(buffer, this.uInt32_); |
|
719
|
|
|
this.smpl.dwNumSampleLoops = this.io.read_(buffer, this.uInt32_); |
|
720
|
|
|
this.smpl.dwSamplerData = this.io.read_(buffer, this.uInt32_); |
|
721
|
|
|
for (let i=0; i<this.smpl.dwNumSampleLoops; i++) { |
|
722
|
|
|
this.smpl.loops.push({ |
|
723
|
|
|
dwName: this.io.read_(buffer, this.uInt32_), |
|
724
|
|
|
dwType: this.io.read_(buffer, this.uInt32_), |
|
725
|
|
|
dwStart: this.io.read_(buffer, this.uInt32_), |
|
726
|
|
|
dwEnd: this.io.read_(buffer, this.uInt32_), |
|
727
|
|
|
dwFraction: this.io.read_(buffer, this.uInt32_), |
|
728
|
|
|
dwPlayCount: this.io.read_(buffer, this.uInt32_), |
|
729
|
|
|
}); |
|
730
|
|
|
} |
|
731
|
|
|
} |
|
732
|
|
|
} |
|
733
|
|
|
|
|
734
|
|
|
/** |
|
735
|
|
|
* Read the 'data' chunk of a wave file. |
|
736
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
737
|
|
|
* @param {!Object} signature The file signature. |
|
738
|
|
|
* @param {boolean} samples True if the samples should be loaded. |
|
739
|
|
|
* @throws {Error} If no 'data' chunk is found. |
|
740
|
|
|
* @private |
|
741
|
|
|
*/ |
|
742
|
|
|
readDataChunk_(buffer, signature, samples) { |
|
743
|
|
|
/** @type {?Object} */ |
|
744
|
|
|
let chunk = this.findChunk_(signature, 'data'); |
|
745
|
|
|
if (chunk) { |
|
746
|
|
|
this.data.chunkId = 'data'; |
|
747
|
|
|
this.data.chunkSize = chunk.chunkSize; |
|
748
|
|
|
if (samples) { |
|
749
|
|
|
this.data.samples = buffer.slice( |
|
750
|
|
|
chunk.chunkData.start, |
|
751
|
|
|
chunk.chunkData.end); |
|
752
|
|
|
} |
|
753
|
|
|
} else { |
|
754
|
|
|
throw Error('Could not find the "data" chunk'); |
|
755
|
|
|
} |
|
756
|
|
|
} |
|
757
|
|
|
|
|
758
|
|
|
/** |
|
759
|
|
|
* Read the 'bext' chunk of a wav file. |
|
760
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
761
|
|
|
* @param {!Object} signature The file signature. |
|
762
|
|
|
* @private |
|
763
|
|
|
*/ |
|
764
|
|
|
readBextChunk_(buffer, signature) { |
|
765
|
|
|
/** @type {?Object} */ |
|
766
|
|
|
let chunk = this.findChunk_(signature, 'bext'); |
|
767
|
|
|
if (chunk) { |
|
768
|
|
|
this.io.head_ = chunk.chunkData.start; |
|
769
|
|
|
this.bext.chunkId = chunk.chunkId; |
|
770
|
|
|
this.bext.chunkSize = chunk.chunkSize; |
|
771
|
|
|
this.bext.description = this.io.readString_(buffer, 256); |
|
772
|
|
|
this.bext.originator = this.io.readString_(buffer, 32); |
|
773
|
|
|
this.bext.originatorReference = this.io.readString_(buffer, 32); |
|
774
|
|
|
this.bext.originationDate = this.io.readString_(buffer, 10); |
|
775
|
|
|
this.bext.originationTime = this.io.readString_(buffer, 8); |
|
776
|
|
|
this.bext.timeReference = [ |
|
777
|
|
|
this.io.read_(buffer, this.uInt32_), |
|
778
|
|
|
this.io.read_(buffer, this.uInt32_)]; |
|
779
|
|
|
this.bext.version = this.io.read_(buffer, this.uInt16_); |
|
780
|
|
|
this.bext.UMID = this.io.readString_(buffer, 64); |
|
781
|
|
|
this.bext.loudnessValue = this.io.read_(buffer, this.uInt16_); |
|
782
|
|
|
this.bext.loudnessRange = this.io.read_(buffer, this.uInt16_); |
|
783
|
|
|
this.bext.maxTruePeakLevel = this.io.read_(buffer, this.uInt16_); |
|
784
|
|
|
this.bext.maxMomentaryLoudness = this.io.read_(buffer, this.uInt16_); |
|
785
|
|
|
this.bext.maxShortTermLoudness = this.io.read_(buffer, this.uInt16_); |
|
786
|
|
|
this.bext.reserved = this.io.readString_(buffer, 180); |
|
787
|
|
|
this.bext.codingHistory = this.io.readString_( |
|
788
|
|
|
buffer, this.bext.chunkSize - 602); |
|
789
|
|
|
} |
|
790
|
|
|
} |
|
791
|
|
|
|
|
792
|
|
|
/** |
|
793
|
|
|
* Read the 'ds64' chunk of a wave file. |
|
794
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
795
|
|
|
* @param {!Object} signature The file signature. |
|
796
|
|
|
* @throws {Error} If no 'ds64' chunk is found and the file is RF64. |
|
797
|
|
|
* @private |
|
798
|
|
|
*/ |
|
799
|
|
|
readDs64Chunk_(buffer, signature) { |
|
800
|
|
|
/** @type {?Object} */ |
|
801
|
|
|
let chunk = this.findChunk_(signature, 'ds64'); |
|
802
|
|
|
if (chunk) { |
|
803
|
|
|
this.io.head_ = chunk.chunkData.start; |
|
804
|
|
|
this.ds64.chunkId = chunk.chunkId; |
|
805
|
|
|
this.ds64.chunkSize = chunk.chunkSize; |
|
806
|
|
|
this.ds64.riffSizeHigh = this.io.read_(buffer, this.uInt32_); |
|
807
|
|
|
this.ds64.riffSizeLow = this.io.read_(buffer, this.uInt32_); |
|
808
|
|
|
this.ds64.dataSizeHigh = this.io.read_(buffer, this.uInt32_); |
|
809
|
|
|
this.ds64.dataSizeLow = this.io.read_(buffer, this.uInt32_); |
|
810
|
|
|
this.ds64.originationTime = this.io.read_(buffer, this.uInt32_); |
|
811
|
|
|
this.ds64.sampleCountHigh = this.io.read_(buffer, this.uInt32_); |
|
812
|
|
|
this.ds64.sampleCountLow = this.io.read_(buffer, this.uInt32_); |
|
813
|
|
|
//if (this.ds64.chunkSize > 28) { |
|
814
|
|
|
// this.ds64.tableLength = unpack( |
|
815
|
|
|
// chunkData.slice(28, 32), this.uInt32_); |
|
816
|
|
|
// this.ds64.table = chunkData.slice( |
|
817
|
|
|
// 32, 32 + this.ds64.tableLength); |
|
818
|
|
|
//} |
|
819
|
|
|
} else { |
|
820
|
|
|
if (this.container == 'RF64') { |
|
821
|
|
|
throw Error('Could not find the "ds64" chunk'); |
|
822
|
|
|
} |
|
823
|
|
|
} |
|
824
|
|
|
} |
|
825
|
|
|
|
|
826
|
|
|
/** |
|
827
|
|
|
* Read the 'LIST' chunks of a wave file. |
|
828
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
829
|
|
|
* @param {!Object} signature The file signature. |
|
830
|
|
|
* @private |
|
831
|
|
|
*/ |
|
832
|
|
|
readLISTChunk_(buffer, signature) { |
|
833
|
|
|
/** @type {?Object} */ |
|
834
|
|
|
let listChunks = this.findChunk_(signature, 'LIST', true); |
|
835
|
|
|
if (listChunks === null) { |
|
836
|
|
|
return; |
|
837
|
|
|
} |
|
838
|
|
|
for (let j=0; j < listChunks.length; j++) { |
|
839
|
|
|
/** @type {!Object} */ |
|
840
|
|
|
let subChunk = listChunks[j]; |
|
841
|
|
|
this.LIST.push({ |
|
842
|
|
|
chunkId: subChunk.chunkId, |
|
843
|
|
|
chunkSize: subChunk.chunkSize, |
|
844
|
|
|
format: subChunk.format, |
|
845
|
|
|
subChunks: []}); |
|
846
|
|
|
for (let x=0; x<subChunk.subChunks.length; x++) { |
|
847
|
|
|
this.readLISTSubChunks_(subChunk.subChunks[x], |
|
848
|
|
|
subChunk.format, buffer); |
|
849
|
|
|
} |
|
850
|
|
|
} |
|
851
|
|
|
} |
|
852
|
|
|
|
|
853
|
|
|
/** |
|
854
|
|
|
* Read the sub chunks of a 'LIST' chunk. |
|
855
|
|
|
* @param {!Object} subChunk The 'LIST' subchunks. |
|
856
|
|
|
* @param {string} format The 'LIST' format, 'adtl' or 'INFO'. |
|
857
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
858
|
|
|
* @private |
|
859
|
|
|
*/ |
|
860
|
|
|
readLISTSubChunks_(subChunk, format, buffer) { |
|
861
|
|
|
if (format == 'adtl') { |
|
862
|
|
|
if (['labl', 'note','ltxt'].indexOf(subChunk.chunkId) > -1) { |
|
863
|
|
|
this.io.head_ = subChunk.chunkData.start; |
|
864
|
|
|
/** @type {!Object<string, string|number>} */ |
|
865
|
|
|
let item = { |
|
866
|
|
|
chunkId: subChunk.chunkId, |
|
867
|
|
|
chunkSize: subChunk.chunkSize, |
|
868
|
|
|
dwName: this.io.read_(buffer, this.uInt32_) |
|
869
|
|
|
}; |
|
870
|
|
|
if (subChunk.chunkId == 'ltxt') { |
|
871
|
|
|
item.dwSampleLength = this.io.read_(buffer, this.uInt32_); |
|
872
|
|
|
item.dwPurposeID = this.io.read_(buffer, this.uInt32_); |
|
873
|
|
|
item.dwCountry = this.io.read_(buffer, this.uInt16_); |
|
874
|
|
|
item.dwLanguage = this.io.read_(buffer, this.uInt16_); |
|
875
|
|
|
item.dwDialect = this.io.read_(buffer, this.uInt16_); |
|
876
|
|
|
item.dwCodePage = this.io.read_(buffer, this.uInt16_); |
|
877
|
|
|
} |
|
878
|
|
|
item.value = this.io.readZSTR_(buffer, this.io.head_); |
|
879
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push(item); |
|
880
|
|
|
} |
|
881
|
|
|
// RIFF INFO tags like ICRD, ISFT, ICMT |
|
882
|
|
|
} else if(format == 'INFO') { |
|
883
|
|
|
this.io.head_ = subChunk.chunkData.start; |
|
884
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push({ |
|
885
|
|
|
chunkId: subChunk.chunkId, |
|
886
|
|
|
chunkSize: subChunk.chunkSize, |
|
887
|
|
|
value: this.io.readZSTR_(buffer, this.io.head_) |
|
888
|
|
|
}); |
|
889
|
|
|
} |
|
890
|
|
|
} |
|
891
|
|
|
|
|
892
|
|
|
/** |
|
893
|
|
|
* Read the 'junk' chunk of a wave file. |
|
894
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
895
|
|
|
* @param {!Object} signature The file signature. |
|
896
|
|
|
* @private |
|
897
|
|
|
*/ |
|
898
|
|
|
readJunkChunk_(buffer, signature) { |
|
899
|
|
|
/** @type {?Object} */ |
|
900
|
|
|
let chunk = this.findChunk_(signature, 'junk'); |
|
901
|
|
|
if (chunk) { |
|
902
|
|
|
this.junk = { |
|
903
|
|
|
chunkId: chunk.chunkId, |
|
904
|
|
|
chunkSize: chunk.chunkSize, |
|
905
|
|
|
chunkData: [].slice.call(buffer.slice( |
|
906
|
|
|
chunk.chunkData.start, |
|
907
|
|
|
chunk.chunkData.end)) |
|
908
|
|
|
}; |
|
909
|
|
|
} |
|
910
|
|
|
} |
|
911
|
|
|
} |
|
912
|
|
|
|
rochars /
wavefile
