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/* |
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* Copyright (c) 2017-2019 Rafael da Silva Rocha. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining |
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* a copy of this software and associated documentation files (the |
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* "Software"), to deal in the Software without restriction, including |
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* without limitation the rights to use, copy, modify, merge, publish, |
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* distribute, sublicense, and/or sell copies of the Software, and to |
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* permit persons to whom the Software is furnished to do so, subject to |
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* the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be |
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* included in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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* |
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*/ |
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/** |
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* @fileoverview The WaveFileMetaEditor class. |
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* @see https://github.com/rochars/wavefile |
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*/ |
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import { WaveFileCreator } from './wavefile-creator'; |
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/** |
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* A class to edit meta information in wav files. |
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* @extends WaveFileCreator |
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* @ignore |
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*/ |
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export class WaveFileMetaEditor extends WaveFileCreator { |
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/** |
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* Return the value of a RIFF tag in the INFO chunk. |
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* @param {string} tag The tag name. |
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* @return {?string} The value if the tag is found, null otherwise. |
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*/ |
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getTag(tag) { |
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/** @type {!Object} */ |
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let index = this.getTagIndex_(tag); |
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if (index.TAG !== null) { |
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return this.LIST[index.LIST].subChunks[index.TAG].value; |
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} |
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return null; |
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} |
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/** |
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* Write a RIFF tag in the INFO chunk. If the tag do not exist, |
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* then it is created. It if exists, it is overwritten. |
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* @param {string} tag The tag name. |
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* @param {string} value The tag value. |
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* @throws {Error} If the tag name is not valid. |
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*/ |
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setTag(tag, value) { |
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tag = fixRIFFTag_(tag); |
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/** @type {!Object} */ |
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let index = this.getTagIndex_(tag); |
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if (index.TAG !== null) { |
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this.LIST[index.LIST].subChunks[index.TAG].chunkSize = |
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value.length + 1; |
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this.LIST[index.LIST].subChunks[index.TAG].value = value; |
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} else if (index.LIST !== null) { |
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this.LIST[index.LIST].subChunks.push({ |
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chunkId: tag, |
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chunkSize: value.length + 1, |
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value: value}); |
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} else { |
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this.LIST.push({ |
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chunkId: 'LIST', |
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chunkSize: 8 + value.length + 1, |
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format: 'INFO', |
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subChunks: []}); |
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this.LIST[this.LIST.length - 1].subChunks.push({ |
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chunkId: tag, |
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chunkSize: value.length + 1, |
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value: value}); |
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} |
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} |
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/** |
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* Remove a RIFF tag from the INFO chunk. |
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* @param {string} tag The tag name. |
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* @return {boolean} True if a tag was deleted. |
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*/ |
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deleteTag(tag) { |
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/** @type {!Object} */ |
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let index = this.getTagIndex_(tag); |
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if (index.TAG !== null) { |
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this.LIST[index.LIST].subChunks.splice(index.TAG, 1); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Return a Object<tag, value> with the RIFF tags in the file. |
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* @return {!Object<string, string>} The file tags. |
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*/ |
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listTags() { |
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/** @type {?number} */ |
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let index = this.getLISTINFOIndex_(); |
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/** @type {!Object} */ |
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let tags = {}; |
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if (index !== null) { |
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for (let i = 0, len = this.LIST[index].subChunks.length; i < len; i++) { |
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tags[this.LIST[index].subChunks[i].chunkId] = |
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this.LIST[index].subChunks[i].value; |
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} |
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} |
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return tags; |
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} |
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/** |
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* Return an array with all cue points in the file, in the order they appear |
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* in the file. |
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* Objects representing cue points/regions look like this: |
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* { |
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* position: 500, // the position in milliseconds |
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* label: 'cue marker 1', |
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* end: 1500, // the end position in milliseconds |
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* dwName: 1, |
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* dwPosition: 0, |
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* fccChunk: 'data', |
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* dwChunkStart: 0, |
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* dwBlockStart: 0, |
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* dwSampleOffset: 22050, // the position as a sample offset |
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* dwSampleLength: 3646827, // length as a sample count, 0 if not a region |
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* dwPurposeID: 544106354, |
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* dwCountry: 0, |
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* dwLanguage: 0, |
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* dwDialect: 0, |
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* dwCodePage: 0, |
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* } |
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* @return {!Array<Object>} |
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*/ |
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listCuePoints() { |
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/** @type {!Array<!Object>} */ |
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let points = this.getCuePoints_(); |
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for (let i = 0, len = points.length; i < len; i++) { |
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// Add attrs that should exist in the object |
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points[i].position = |
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(points[i].dwSampleOffset / this.fmt.sampleRate) * 1000; |
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// If it is a region, calc the end |
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// position in milliseconds |
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if (points[i].dwSampleLength) { |
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points[i].end = |
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(points[i].dwSampleLength / this.fmt.sampleRate) * 1000; |
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points[i].end += points[i].position; |
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// If its not a region, end should be null |
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} else { |
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points[i].end = null; |
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} |
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// Remove attrs that should not go in the results |
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delete points[i].value; |
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} |
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return points; |
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} |
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/** |
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* Create a cue point in the wave file. |
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* @param {!{ |
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* position: number, |
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* label: ?string, |
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* end: ?number, |
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* dwPurposeID: ?number, |
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* dwCountry: ?number, |
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* dwLanguage: ?number, |
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* dwDialect: ?number, |
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* dwCodePage: ?number |
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* }} pointData A object with the data of the cue point. |
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* |
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* # Only required attribute to create a cue point: |
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* pointData.position: The position of the point in milliseconds |
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* |
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* # Optional attribute for cue points: |
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* pointData.label: A string label for the cue point |
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* |
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* # Extra data used for regions |
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* pointData.end: A number representing the end of the region, |
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* in milliseconds, counting from the start of the file. If |
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* no end attr is specified then no region is created. |
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* |
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* # You may also specify the following attrs for regions, all optional: |
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* pointData.dwPurposeID |
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* pointData.dwCountry |
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* pointData.dwLanguage |
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* pointData.dwDialect |
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* pointData.dwCodePage |
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*/ |
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setCuePoint(pointData) { |
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this.cue.chunkId = 'cue '; |
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// label attr should always exist |
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if (!pointData.label) { |
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pointData.label = ''; |
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} |
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/** |
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* Load the existing points before erasing |
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* the LIST 'adtl' chunk and the cue attr |
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* @type {!Array<!Object>} |
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*/ |
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let existingPoints = this.getCuePoints_(); |
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// Clear any LIST labeled 'adtl' |
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// The LIST chunk should be re-written |
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// after the new cue point is created |
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this.clearLISTadtl_(); |
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// Erase this.cue so it can be re-written |
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// after the point is added |
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this.cue.points = []; |
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/** |
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* Cue position param is informed in milliseconds, |
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* here its value is converted to the sample offset |
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* @type {number} |
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*/ |
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pointData.dwSampleOffset = |
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(pointData.position * this.fmt.sampleRate) / 1000; |
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/** |
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* end param is informed in milliseconds, counting |
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* from the start of the file. |
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* here its value is converted to the sample length |
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* of the region. |
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* @type {number} |
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*/ |
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pointData.dwSampleLength = 0; |
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if (pointData.end) { |
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pointData.dwSampleLength = |
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((pointData.end * this.fmt.sampleRate) / 1000) - |
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pointData.dwSampleOffset; |
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} |
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// If there were no cue points in the file, |
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// insert the new cue point as the first |
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if (existingPoints.length === 0) { |
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this.setCuePoint_(pointData, 1); |
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// If the file already had cue points, This new one |
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// must be added in the list according to its position. |
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} else { |
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this.setCuePointInOrder_(existingPoints, pointData); |
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} |
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this.cue.dwCuePoints = this.cue.points.length; |
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} |
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/** |
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* Remove a cue point from a wave file. |
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* @param {number} index the index of the point. First is 1, |
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* second is 2, and so on. |
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*/ |
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deleteCuePoint(index) { |
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this.cue.chunkId = 'cue '; |
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/** @type {!Array<!Object>} */ |
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let existingPoints = this.getCuePoints_(); |
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this.clearLISTadtl_(); |
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/** @type {number} */ |
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let len = this.cue.points.length; |
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this.cue.points = []; |
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for (let i = 0; i < len; i++) { |
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if (i + 1 !== index) { |
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this.setCuePoint_(existingPoints[i], i + 1); |
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} |
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} |
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this.cue.dwCuePoints = this.cue.points.length; |
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if (this.cue.dwCuePoints) { |
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this.cue.chunkId = 'cue '; |
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} else { |
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this.cue.chunkId = ''; |
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this.clearLISTadtl_(); |
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} |
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} |
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/** |
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* Update the label of a cue point. |
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* @param {number} pointIndex The ID of the cue point. |
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* @param {string} label The new text for the label. |
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*/ |
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updateLabel(pointIndex, label) { |
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/** @type {?number} */ |
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let cIndex = this.getAdtlChunk_(); |
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if (cIndex !== null) { |
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for (let i = 0, len = this.LIST[cIndex].subChunks.length; i < len; i++) { |
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if (this.LIST[cIndex].subChunks[i].dwName == |
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pointIndex) { |
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this.LIST[cIndex].subChunks[i].value = label; |
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} |
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} |
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} |
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} |
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/** |
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303
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* Return an array with all cue points in the file, in the order they appear |
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* in the file. |
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* @return {!Array<!Object>} |
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* @private |
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*/ |
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308
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getCuePoints_() { |
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309
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/** @type {!Array<!Object>} */ |
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310
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let points = []; |
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311
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for (let i = 0; i < this.cue.points.length; i++) { |
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/** @type {!Object} */ |
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313
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let chunk = this.cue.points[i]; |
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314
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/** @type {!Object} */ |
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315
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let pointData = this.getDataForCuePoint_(chunk.dwName); |
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316
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pointData.label = pointData.value ? pointData.value : ''; |
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317
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pointData.dwPosition = chunk.dwPosition; |
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318
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|
pointData.fccChunk = chunk.fccChunk; |
|
319
|
|
|
pointData.dwChunkStart = chunk.dwChunkStart; |
|
320
|
|
|
pointData.dwBlockStart = chunk.dwBlockStart; |
|
321
|
|
|
pointData.dwSampleOffset = chunk.dwSampleOffset; |
|
322
|
|
|
points.push(pointData); |
|
323
|
|
|
} |
|
324
|
|
|
return points; |
|
325
|
|
|
} |
|
326
|
|
|
|
|
327
|
|
|
/** |
|
328
|
|
|
* Return the associated data of a cue point. |
|
329
|
|
|
* @param {number} pointDwName The ID of the cue point. |
|
330
|
|
|
* @return {!Object} |
|
331
|
|
|
* @private |
|
332
|
|
|
*/ |
|
333
|
|
|
getDataForCuePoint_(pointDwName) { |
|
334
|
|
|
/** @type {?number} */ |
|
335
|
|
|
let LISTindex = this.getAdtlChunk_(); |
|
336
|
|
|
/** @type {!Object} */ |
|
337
|
|
|
let pointData = {}; |
|
338
|
|
|
// If there is a adtl LIST in the file, look for |
|
339
|
|
|
// LIST subchunks with data referencing this point |
|
340
|
|
|
if (LISTindex !== null) { |
|
341
|
|
|
this.getCueDataFromLIST_(pointData, LISTindex, pointDwName); |
|
342
|
|
|
} |
|
343
|
|
|
return pointData; |
|
344
|
|
|
} |
|
345
|
|
|
|
|
346
|
|
|
/** |
|
347
|
|
|
* Get all data associated to a cue point in a LIST chunk. |
|
348
|
|
|
* @param {!Object} pointData A object to hold the point data. |
|
349
|
|
|
* @param {number} index The index of the adtl LIST chunk. |
|
350
|
|
|
* @param {number} pointDwName The ID of the cue point. |
|
351
|
|
|
* @private |
|
352
|
|
|
*/ |
|
353
|
|
|
getCueDataFromLIST_(pointData, index, pointDwName) { |
|
354
|
|
|
// got through all chunks in the adtl LIST checking |
|
355
|
|
|
// for references to this cue point |
|
356
|
|
|
for (let i = 0, len = this.LIST[index].subChunks.length; i < len; i++) { |
|
357
|
|
|
if (this.LIST[index].subChunks[i].dwName == pointDwName) { |
|
358
|
|
|
/** @type {!Object} */ |
|
359
|
|
|
let chunk = this.LIST[index].subChunks[i]; |
|
360
|
|
|
// Some chunks may reference the point but |
|
361
|
|
|
// have a empty text; this is to ensure that if |
|
362
|
|
|
// one chunk that reference the point has a text, |
|
363
|
|
|
// this value will be kept as the associated data label |
|
364
|
|
|
// for the cue point. |
|
365
|
|
|
// If different values are present, the last value found |
|
366
|
|
|
// will be considered the label for the cue point. |
|
367
|
|
|
pointData.value = chunk.value || pointData.value; |
|
368
|
|
|
pointData.dwName = chunk.dwName || 0; |
|
369
|
|
|
pointData.dwSampleLength = chunk.dwSampleLength || 0; |
|
370
|
|
|
pointData.dwPurposeID = chunk.dwPurposeID || 0; |
|
371
|
|
|
pointData.dwCountry = chunk.dwCountry || 0; |
|
372
|
|
|
pointData.dwLanguage = chunk.dwLanguage || 0; |
|
373
|
|
|
pointData.dwDialect = chunk.dwDialect || 0; |
|
374
|
|
|
pointData.dwCodePage = chunk.dwCodePage || 0; |
|
375
|
|
|
} |
|
376
|
|
|
} |
|
377
|
|
|
} |
|
378
|
|
|
|
|
379
|
|
|
/** |
|
380
|
|
|
* Return the index of the INFO chunk in the LIST chunk. |
|
381
|
|
|
* @return {?number} the index of the INFO chunk. |
|
382
|
|
|
* @private |
|
383
|
|
|
*/ |
|
384
|
|
|
getLISTINFOIndex_() { |
|
385
|
|
|
/** @type {?number} */ |
|
386
|
|
|
let index = null; |
|
387
|
|
|
for (let i = 0, len = this.LIST.length; i < len; i++) { |
|
388
|
|
|
if (this.LIST[i].format === 'INFO') { |
|
389
|
|
|
index = i; |
|
390
|
|
|
break; |
|
391
|
|
|
} |
|
392
|
|
|
} |
|
393
|
|
|
return index; |
|
394
|
|
|
} |
|
395
|
|
|
|
|
396
|
|
|
/** |
|
397
|
|
|
* Return the index of the 'adtl' LIST in this.LIST. |
|
398
|
|
|
* @return {?number} |
|
399
|
|
|
* @private |
|
400
|
|
|
*/ |
|
401
|
|
|
getAdtlChunk_() { |
|
402
|
|
|
for (let i = 0, len = this.LIST.length; i < len; i++) { |
|
403
|
|
|
if (this.LIST[i].format == 'adtl') { |
|
404
|
|
|
return i; |
|
405
|
|
|
} |
|
406
|
|
|
} |
|
407
|
|
|
return null; |
|
408
|
|
|
} |
|
409
|
|
|
|
|
410
|
|
|
/** |
|
411
|
|
|
* Return the index of a tag in a FILE chunk. |
|
412
|
|
|
* @param {string} tag The tag name. |
|
413
|
|
|
* @return {!Object<string, ?number>} |
|
414
|
|
|
* Object.LIST is the INFO index in LIST |
|
415
|
|
|
* Object.TAG is the tag index in the INFO |
|
416
|
|
|
* @private |
|
417
|
|
|
*/ |
|
418
|
|
|
getTagIndex_(tag) { |
|
419
|
|
|
/** @type {!Object<string, ?number>} */ |
|
420
|
|
|
let index = {LIST: null, TAG: null}; |
|
421
|
|
|
for (let i = 0, len = this.LIST.length; i < len; i++) { |
|
422
|
|
|
if (this.LIST[i].format == 'INFO') { |
|
423
|
|
|
index.LIST = i; |
|
424
|
|
|
for (let j=0, subLen = this.LIST[i].subChunks.length; j < subLen; j++) { |
|
425
|
|
|
if (this.LIST[i].subChunks[j].chunkId == tag) { |
|
426
|
|
|
index.TAG = j; |
|
427
|
|
|
break; |
|
428
|
|
|
} |
|
429
|
|
|
} |
|
430
|
|
|
break; |
|
431
|
|
|
} |
|
432
|
|
|
} |
|
433
|
|
|
return index; |
|
434
|
|
|
} |
|
435
|
|
|
|
|
436
|
|
|
/** |
|
437
|
|
|
* Push a new cue point in this.cue.points. |
|
438
|
|
|
* @param {!Object} pointData A object with data of the cue point. |
|
439
|
|
|
* @param {number} dwName the dwName of the cue point |
|
440
|
|
|
* @private |
|
441
|
|
|
*/ |
|
442
|
|
|
setCuePoint_(pointData, dwName) { |
|
443
|
|
|
this.cue.points.push({ |
|
444
|
|
|
dwName: dwName, |
|
445
|
|
|
dwPosition: pointData.dwPosition ? pointData.dwPosition : 0, |
|
446
|
|
|
fccChunk: pointData.fccChunk ? pointData.fccChunk : 'data', |
|
447
|
|
|
dwChunkStart: pointData.dwChunkStart ? pointData.dwChunkStart : 0, |
|
448
|
|
|
dwBlockStart: pointData.dwBlockStart ? pointData.dwBlockStart : 0, |
|
449
|
|
|
dwSampleOffset: pointData.dwSampleOffset |
|
450
|
|
|
}); |
|
451
|
|
|
this.setLabl_(pointData, dwName); |
|
452
|
|
|
} |
|
453
|
|
|
|
|
454
|
|
|
/** |
|
455
|
|
|
* Push a new cue point in this.cue.points according to existing cue points. |
|
456
|
|
|
* @param {!Array} existingPoints Array with the existing points. |
|
457
|
|
|
* @param {!Object} pointData A object with data of the cue point. |
|
458
|
|
|
* @private |
|
459
|
|
|
*/ |
|
460
|
|
|
setCuePointInOrder_(existingPoints, pointData) { |
|
461
|
|
|
/** @type {boolean} */ |
|
462
|
|
|
let hasSet = false; |
|
463
|
|
|
|
|
464
|
|
|
// Iterate over the cue points that existed |
|
465
|
|
|
// before this one was added |
|
466
|
|
|
for (let i = 0; i < existingPoints.length; i++) { |
|
467
|
|
|
|
|
468
|
|
|
// If the new point is located before this original point |
|
469
|
|
|
// and the new point have not been created, create the |
|
470
|
|
|
// new point and then the original point |
|
471
|
|
|
if (existingPoints[i].dwSampleOffset > |
|
472
|
|
|
pointData.dwSampleOffset && !hasSet) { |
|
473
|
|
|
// create the new point |
|
474
|
|
|
this.setCuePoint_(pointData, i + 1); |
|
475
|
|
|
|
|
476
|
|
|
// create the original point |
|
477
|
|
|
this.setCuePoint_(existingPoints[i], i + 2); |
|
478
|
|
|
hasSet = true; |
|
479
|
|
|
|
|
480
|
|
|
// Otherwise, re-create the original point |
|
481
|
|
|
} else { |
|
482
|
|
|
this.setCuePoint_(existingPoints[i], hasSet ? i + 2 : i + 1); |
|
483
|
|
|
} |
|
484
|
|
|
} |
|
485
|
|
|
// If no point was created in the above loop, |
|
486
|
|
|
// create the new point as the last one |
|
487
|
|
|
if (!hasSet) { |
|
488
|
|
|
this.setCuePoint_(pointData, this.cue.points.length + 1); |
|
489
|
|
|
} |
|
490
|
|
|
} |
|
491
|
|
|
|
|
492
|
|
|
/** |
|
493
|
|
|
* Clear any LIST chunk labeled as 'adtl'. |
|
494
|
|
|
* @private |
|
495
|
|
|
*/ |
|
496
|
|
|
clearLISTadtl_() { |
|
497
|
|
|
for (let i = 0, len = this.LIST.length; i < len; i++) { |
|
498
|
|
|
if (this.LIST[i].format == 'adtl') { |
|
499
|
|
|
this.LIST.splice(i); |
|
500
|
|
|
} |
|
501
|
|
|
} |
|
502
|
|
|
} |
|
503
|
|
|
|
|
504
|
|
|
/** |
|
505
|
|
|
* Create a new 'labl' subchunk in a 'LIST' chunk of type 'adtl'. |
|
506
|
|
|
* This method creates a LIST adtl chunk in the file if one |
|
507
|
|
|
* is not present. |
|
508
|
|
|
* @param {!Object} pointData A object with data of the cue point. |
|
509
|
|
|
* @param {number} dwName The ID of the cue point. |
|
510
|
|
|
* @private |
|
511
|
|
|
*/ |
|
512
|
|
|
setLabl_(pointData, dwName) { |
|
513
|
|
|
/** |
|
514
|
|
|
* Get the index of the LIST chunk labeled as adtl. |
|
515
|
|
|
* A file can have many LIST chunks with unique labels. |
|
516
|
|
|
* @type {?number} |
|
517
|
|
|
*/ |
|
518
|
|
|
let adtlIndex = this.getAdtlChunk_(); |
|
519
|
|
|
// If there is no adtl LIST, create one |
|
520
|
|
|
if (adtlIndex === null) { |
|
521
|
|
|
// Include a new item LIST chunk |
|
522
|
|
|
this.LIST.push({ |
|
523
|
|
|
chunkId: 'LIST', |
|
524
|
|
|
chunkSize: 4, |
|
525
|
|
|
format: 'adtl', |
|
526
|
|
|
subChunks: []}); |
|
527
|
|
|
// Get the index of the new LIST chunk |
|
528
|
|
|
adtlIndex = this.LIST.length - 1; |
|
529
|
|
|
} |
|
530
|
|
|
this.setLabelText_(adtlIndex, pointData, dwName); |
|
531
|
|
|
if (pointData.dwSampleLength) { |
|
532
|
|
|
this.setLtxtChunk_(adtlIndex, pointData, dwName); |
|
533
|
|
|
} |
|
534
|
|
|
} |
|
535
|
|
|
|
|
536
|
|
|
/** |
|
537
|
|
|
* Create a new 'labl' subchunk in a 'LIST' chunk of type 'adtl'. |
|
538
|
|
|
* @param {number} adtlIndex The index of the 'adtl' LIST in this.LIST. |
|
539
|
|
|
* @param {!Object} pointData A object with data of the cue point. |
|
540
|
|
|
* @param {number} dwName The ID of the cue point. |
|
541
|
|
|
* @private |
|
542
|
|
|
*/ |
|
543
|
|
|
setLabelText_(adtlIndex, pointData, dwName) { |
|
544
|
|
|
this.LIST[adtlIndex].subChunks.push({ |
|
545
|
|
|
chunkId: 'labl', |
|
546
|
|
|
chunkSize: 4, // should be 4 + label length in bytes |
|
547
|
|
|
dwName: dwName, |
|
548
|
|
|
value: pointData.label |
|
549
|
|
|
}); |
|
550
|
|
|
this.LIST[adtlIndex].chunkSize += 12; // should be 4 + label byte length |
|
551
|
|
|
} |
|
552
|
|
|
/** |
|
553
|
|
|
* Create a new 'ltxt' subchunk in a 'LIST' chunk of type 'adtl'. |
|
554
|
|
|
* @param {number} adtlIndex The index of the 'adtl' LIST in this.LIST. |
|
555
|
|
|
* @param {!Object} pointData A object with data of the cue point. |
|
556
|
|
|
* @param {number} dwName The ID of the cue point. |
|
557
|
|
|
* @private |
|
558
|
|
|
*/ |
|
559
|
|
|
setLtxtChunk_(adtlIndex, pointData, dwName) { |
|
560
|
|
|
this.LIST[adtlIndex].subChunks.push({ |
|
561
|
|
|
chunkId: 'ltxt', |
|
562
|
|
|
chunkSize: 20, // should be 12 + label byte length |
|
563
|
|
|
dwName: dwName, |
|
564
|
|
|
dwSampleLength: pointData.dwSampleLength, |
|
565
|
|
|
dwPurposeID: pointData.dwPurposeID ? pointData.dwPurposeID : 0, |
|
566
|
|
|
dwCountry: pointData.dwCountry ? pointData.dwCountry : 0, |
|
567
|
|
|
dwLanguage: pointData.dwLanguage ? pointData.dwLanguage : 0, |
|
568
|
|
|
dwDialect: pointData.dwDialect ? pointData.dwDialect : 0, |
|
569
|
|
|
dwCodePage: pointData.dwCodePage ? pointData.dwCodePage : 0, |
|
570
|
|
|
value: pointData.label // kept for compatibility |
|
571
|
|
|
}); |
|
572
|
|
|
this.LIST[adtlIndex].chunkSize += 28; |
|
573
|
|
|
} |
|
574
|
|
|
} |
|
575
|
|
|
|
|
576
|
|
|
/** |
|
577
|
|
|
* Fix a RIFF tag format if possible, throw an error otherwise. |
|
578
|
|
|
* @param {string} tag The tag name. |
|
579
|
|
|
* @return {string} The tag name in proper fourCC format. |
|
580
|
|
|
* @private |
|
581
|
|
|
*/ |
|
582
|
|
|
function fixRIFFTag_(tag) { |
|
583
|
|
|
if (tag.constructor !== String) { |
|
584
|
|
|
throw new Error('Invalid tag name.'); |
|
585
|
|
|
} else if (tag.length < 4) { |
|
586
|
|
|
for (let i = 0, len = 4 - tag.length; i < len; i++) { |
|
587
|
|
|
tag += ' '; |
|
588
|
|
|
} |
|
589
|
|
|
} |
|
590
|
|
|
return tag; |
|
591
|
|
|
} |
|
592
|
|
|
|
rochars /
wavefile
