WaveFile - Code Metrics - Inspection of "Update package-lock version number" - rochars/wavefile - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 317dbe...83670a )

by Rafael S.

created 2019-08-07 17:57 UTC

WaveFile C

↳ Parent: index.js

Complexity

Total Complexity

Size/Duplication

Total Lines	390
Duplicated Lines	0 %

Importance

Changes

Metric	Value
wmc	54
eloc	178
dl	0
loc	390
rs	6.4799
c	0
b	0
f	0

21 Functions

Rating	Name	Size	Complexity
A	setCuePoint_	11	1
A	getCuePoints_	11	2
A	getTagIndex_	17	5
A	getLabelForCuePoint_	13	4
A	fromBase64	3	1
A	fromDataURI	3	1
A	updateLabel	12	4
A	listTags	13	3
B	setCuePoint	35	5
A	deleteCuePoint	24	4
A	toDataURI	3	1
A	getLISTINFOIndex_	11	3
A	toBase64	5	1
A	setLabl_	13	3
A	setLabelText_	9	1
A	clearLISTadtl_	7	3
A	getTag	8	2
A	listCuePoints	9	2
A	getAdtlChunk_	8	3
A	deleteTag	9	2
A	setTag	25	3

How to fix Complexity

/*
 * Copyright (c) 2017-2019 Rafael da Silva Rocha.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

/**
 * @fileoverview The WaveFile class.
 * @see https://github.com/rochars/wavefile
 */

/** @module wavefile */

import {encode, decode} from 'base64-arraybuffer-es6';
import WaveFileConverter from './lib/wavefile-converter';
import fixRIFFTag from './lib/fix-riff-tag';

/**
 * A class to manipulate wav files.
 * @extends WaveFileConverter
 */
export default class WaveFile extends WaveFileConverter {

  /**
   * Use a .wav file encoded as a base64 string to load the WaveFile object.
   * @param {string} base64String A .wav file as a base64 string.
   * @throws {Error} If any property of the object appears invalid.
   */
  fromBase64(base64String) {
    this.fromBuffer(new Uint8Array(decode(base64String)));
  }

  /**
   * Return a base64 string representig the WaveFile object as a .wav file.
   * @return {string} A .wav file as a base64 string.
   * @throws {Error} If any property of the object appears invalid.
   */
  toBase64() {
    /** @type {!Uint8Array} */
    let buffer = this.toBuffer();
    return encode(buffer, 0, buffer.length);
  }

  /**
   * Return a DataURI string representig the WaveFile object as a .wav file.
   * The return of this method can be used to load the audio in browsers.
   * @return {string} A .wav file as a DataURI.
   * @throws {Error} If any property of the object appears invalid.
   */
  toDataURI() {
    return 'data:audio/wav;base64,' + this.toBase64();
  }

  /**
   * Use a .wav file encoded as a DataURI to load the WaveFile object.
   * @param {string} dataURI A .wav file as DataURI.
   * @throws {Error} If any property of the object appears invalid.
   */
  fromDataURI(dataURI) {
    this.fromBase64(dataURI.replace('data:audio/wav;base64,', ''));
  }

  /**
   * Write a RIFF tag in the INFO chunk. If the tag do not exist,
   * then it is created. It if exists, it is overwritten.
   * @param {string} tag The tag name.
   * @param {string} value The tag value.
   * @throws {Error} If the tag name is not valid.
   */
  setTag(tag, value) {
    tag = fixRIFFTag(tag);
    /** @type {!Object} */
    let index = this.getTagIndex_(tag);
    if (index.TAG !== null) {
      this.LIST[index.LIST].subChunks[index.TAG].chunkSize =
        value.length + 1;
      this.LIST[index.LIST].subChunks[index.TAG].value = value;
    } else if (index.LIST !== null) {
      this.LIST[index.LIST].subChunks.push({
        chunkId: tag,
        chunkSize: value.length + 1,
        value: value});
    } else {
      this.LIST.push({
        chunkId: 'LIST',
        chunkSize: 8 + value.length + 1,
        format: 'INFO',
        subChunks: []});
      this.LIST[this.LIST.length - 1].subChunks.push({
        chunkId: tag,
        chunkSize: value.length + 1,
        value: value});
    }
  }

  /**
   * Return the value of a RIFF tag in the INFO chunk.
   * @param {string} tag The tag name.
   * @return {?string} The value if the tag is found, null otherwise.
   */
  getTag(tag) {
    /** @type {!Object} */
    let index = this.getTagIndex_(tag);
    if (index.TAG !== null) {
      return this.LIST[index.LIST].subChunks[index.TAG].value;
    }
    return null;
  }

  /**
   * Return a Object<tag, value> with the RIFF tags in the file.
   * @return {!Object<string, string>} The file tags.
   */
  listTags() {
    /** @type {?number} */
    let index = this.getLISTINFOIndex_();
    /** @type {!Object} */
    let tags = {};
    if (index !== null) {
      for (let i = 0, len = this.LIST[index].subChunks.length; i < len; i++) {
        tags[this.LIST[index].subChunks[i].chunkId] =
          this.LIST[index].subChunks[i].value;
      }
    }
    return tags;
  }

  /**
   * Remove a RIFF tag from the INFO chunk.
   * @param {string} tag The tag name.
   * @return {boolean} True if a tag was deleted.
   */
  deleteTag(tag) {
    /** @type {!Object} */
    let index = this.getTagIndex_(tag);
    if (index.TAG !== null) {
      this.LIST[index.LIST].subChunks.splice(index.TAG, 1);
      return true;
    }
    return false;
  }

  /**
   * Create a cue point in the wave file.
   * @param {number} position The cue point position in milliseconds.
   * @param {string} labl The LIST adtl labl text of the marker. Optional.
   */
  setCuePoint(position, labl='') {
    this.cue.chunkId = 'cue ';
    position = (position * this.fmt.sampleRate) / 1000;
    /** @type {!Array<!Object>} */
    let existingPoints = this.getCuePoints_();
    this.clearLISTadtl_();
    /** @type {number} */
    let len = this.cue.points.length;
    this.cue.points = [];
    /** @type {boolean} */
    let hasSet = false;
    if (len === 0) {
      this.setCuePoint_(position, 1, labl);
    } else {
      for (let i = 0; i < len; i++) {
        if (existingPoints[i].dwPosition > position && !hasSet) {
          this.setCuePoint_(position, i + 1, labl);
          this.setCuePoint_(
            existingPoints[i].dwPosition,
            i + 2,
            existingPoints[i].label);
          hasSet = true;
        } else {
          this.setCuePoint_(
            existingPoints[i].dwPosition,
            i + 1,
            existingPoints[i].label);
        }
      }
      if (!hasSet) {
        this.setCuePoint_(position, this.cue.points.length + 1, labl);
      }
    }
    this.cue.dwCuePoints = this.cue.points.length;
  }

  /**
   * Remove a cue point from a wave file.
   * @param {number} index the index of the point. First is 1,
   *    second is 2, and so on.
   */
  deleteCuePoint(index) {
    this.cue.chunkId = 'cue ';
    /** @type {!Array<!Object>} */
    let existingPoints = this.getCuePoints_();
    this.clearLISTadtl_();
    /** @type {number} */
    let len = this.cue.points.length;
    this.cue.points = [];
    for (let i = 0; i < len; i++) {
      if (i + 1 !== index) {
        this.setCuePoint_(
          existingPoints[i].dwPosition,
          i + 1,
          existingPoints[i].label);
      }
    }
    this.cue.dwCuePoints = this.cue.points.length;
    if (this.cue.dwCuePoints) {
      this.cue.chunkId = 'cue ';
    } else {
      this.cue.chunkId = '';
      this.clearLISTadtl_();
    }
  }

  /**
   * Return an array with all cue points in the file, in the order they appear
   * in the file.
   * The difference between this method and using the list in WaveFile.cue
   * is that the return value of this method includes the position in
   * milliseconds of each cue point (WaveFile.cue only have the sample offset)
   * @return {!Array<!Object>}
   */
  listCuePoints() {
    /** @type {!Array<!Object>} */
    let points = this.getCuePoints_();
    for (let i = 0, len = points.length; i < len; i++) {
      points[i].milliseconds =
        (points[i].dwPosition / this.fmt.sampleRate) * 1000;
    }
    return points;
  }

  /**
   * Update the label of a cue point.
   * @param {number} pointIndex The ID of the cue point.
   * @param {string} label The new text for the label.
   */
  updateLabel(pointIndex, label) {
    /** @type {?number} */
    let cIndex = this.getAdtlChunk_();
    if (cIndex !== null) {
      for (let i = 0, len = this.LIST[cIndex].subChunks.length; i < len; i++) {
        if (this.LIST[cIndex].subChunks[i].dwName ==
            pointIndex) {
          this.LIST[cIndex].subChunks[i].value = label;
        }
      }
    }
  }

  /**
   * Push a new cue point in this.cue.points.
   * @param {number} position The position in milliseconds.
   * @param {number} dwName the dwName of the cue point
   * @private
   */
  setCuePoint_(position, dwName, label) {
    this.cue.points.push({
      dwName: dwName,
      dwPosition: position,
      fccChunk: 'data',
      dwChunkStart: 0,
      dwBlockStart: 0,
      dwSampleOffset: position,
    });
    this.setLabl_(dwName, label);
  }

  /**
   * Return an array with all cue points in the file, in the order they appear
   * in the file.
   * @return {!Array<!Object>}
   * @private
   */
  getCuePoints_() {
    /** @type {!Array<!Object>} */
    let points = [];
    for (let i = 0, len = this.cue.points.length; i < len; i++) {
      points.push({
        dwPosition: this.cue.points[i].dwPosition,
        label: this.getLabelForCuePoint_(
          this.cue.points[i].dwName)});
    }
    return points;
  }

  /**
   * Return the label of a cue point.
   * @param {number} pointDwName The ID of the cue point.
   * @return {string}
   * @private
   */
  getLabelForCuePoint_(pointDwName) {
    /** @type {?number} */
    let cIndex = this.getAdtlChunk_();
    if (cIndex !== null) {
      for (let i = 0, len = this.LIST[cIndex].subChunks.length; i < len; i++) {
        if (this.LIST[cIndex].subChunks[i].dwName ==
            pointDwName) {
          return this.LIST[cIndex].subChunks[i].value;
        }
      }
    }
    return '';
  }

  /**
   * Clear any LIST chunk labeled as 'adtl'.
   * @private
   */
  clearLISTadtl_() {
    for (let i = 0, len = this.LIST.length; i < len; i++) {
      if (this.LIST[i].format == 'adtl') {
        this.LIST.splice(i);
      }
    }
  }

  /**
   * Create a new 'labl' subchunk in a 'LIST' chunk of type 'adtl'.
   * @param {number} dwName The ID of the cue point.
   * @param {string} label The label for the cue point.
   * @private
   */
  setLabl_(dwName, label) {
    /** @type {?number} */
    let adtlIndex = this.getAdtlChunk_();
    if (adtlIndex === null) {
      this.LIST.push({
        chunkId: 'LIST',
        chunkSize: 4,
        format: 'adtl',
        subChunks: []});
      adtlIndex = this.LIST.length - 1;
    }
    this.setLabelText_(adtlIndex === null ? 0 : adtlIndex, dwName, label);
  }

  /**
   * Create a new 'labl' subchunk in a 'LIST' chunk of type 'adtl'.
   * @param {number} adtlIndex The index of the 'adtl' LIST in this.LIST.
   * @param {number} dwName The ID of the cue point.
   * @param {string} label The label for the cue point.
   * @private
   */
  setLabelText_(adtlIndex, dwName, label) {
    this.LIST[adtlIndex].subChunks.push({
      chunkId: 'labl',
      chunkSize: label.length,
      dwName: dwName,
      value: label
    });
    this.LIST[adtlIndex].chunkSize += label.length + 4 + 4 + 4 + 1;
  }

  /**
   * Return the index of the 'adtl' LIST in this.LIST.
   * @return {?number}
   * @private
   */
  getAdtlChunk_() {
    for (let i = 0, len = this.LIST.length; i < len; i++) {
      if (this.LIST[i].format == 'adtl') {
        return i;
      }
    }
    return null;
  }

  /**
   * Return the index of the INFO chunk in the LIST chunk.
   * @return {?number} the index of the INFO chunk.
   * @private
   */
  getLISTINFOIndex_() {
    /** @type {?number} */
    let index = null;
    for (let i = 0, len = this.LIST.length; i < len; i++) {
      if (this.LIST[i].format === 'INFO') {
        index = i;
        break;
      }
    }
    return index;
  }

  /**
   * Return the index of a tag in a FILE chunk.
   * @param {string} tag The tag name.
   * @return {!Object<string, ?number>}
   *    Object.LIST is the INFO index in LIST
   *    Object.TAG is the tag index in the INFO
   * @private
   */
  getTagIndex_(tag) {
    /** @type {!Object<string, ?number>} */
    let index = {LIST: null, TAG: null};
    for (let i = 0, len = this.LIST.length; i < len; i++) {
      if (this.LIST[i].format == 'INFO') {
        index.LIST = i;
        for (let j=0, subLen = this.LIST[i].subChunks.length; j < subLen; j++) {
          if (this.LIST[i].subChunks[j].chunkId == tag) {
            index.TAG = j;
            break;
          }
        }
        break;
      }
    }
    return index;
  }
}


1			/*
2			* Copyright (c) 2017-2019 Rafael da Silva Rocha.
3			*
4			* Permission is hereby granted, free of charge, to any person obtaining
5			* a copy of this software and associated documentation files (the
6			* "Software"), to deal in the Software without restriction, including
7			* without limitation the rights to use, copy, modify, merge, publish,
8			* distribute, sublicense, and/or sell copies of the Software, and to
9			* permit persons to whom the Software is furnished to do so, subject to
10			* the following conditions:
11			*
12			* The above copyright notice and this permission notice shall be
13			* included in all copies or substantial portions of the Software.
14			*
15			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16			* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17			* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18			* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19			* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20			* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21			* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22			*
23			*/
24
25			/**
26			* @fileoverview The WaveFile class.
27			* @see https://github.com/rochars/wavefile
28			*/
29
30			/** @module wavefile */
31
32			import {encode, decode} from 'base64-arraybuffer-es6';
33			import WaveFileConverter from './lib/wavefile-converter';
34			import fixRIFFTag from './lib/fix-riff-tag';
35
36			/**
37			* A class to manipulate wav files.
38			* @extends WaveFileConverter
39			*/
40			export default class WaveFile extends WaveFileConverter {
41
42			/**
43			* Use a .wav file encoded as a base64 string to load the WaveFile object.
44			* @param {string} base64String A .wav file as a base64 string.
45			* @throws {Error} If any property of the object appears invalid.
46			*/
47			fromBase64(base64String) {
48			this.fromBuffer(new Uint8Array(decode(base64String)));
49			}
50
51			/**
52			* Return a base64 string representig the WaveFile object as a .wav file.
53			* @return {string} A .wav file as a base64 string.
54			* @throws {Error} If any property of the object appears invalid.
55			*/
56			toBase64() {
57			/** @type {!Uint8Array} */
58			let buffer = this.toBuffer();
59			return encode(buffer, 0, buffer.length);
60			}
61
62			/**
63			* Return a DataURI string representig the WaveFile object as a .wav file.
64			* The return of this method can be used to load the audio in browsers.
65			* @return {string} A .wav file as a DataURI.
66			* @throws {Error} If any property of the object appears invalid.
67			*/
68			toDataURI() {
69			return 'data:audio/wav;base64,' + this.toBase64();
70			}
71
72			/**
73			* Use a .wav file encoded as a DataURI to load the WaveFile object.
74			* @param {string} dataURI A .wav file as DataURI.
75			* @throws {Error} If any property of the object appears invalid.
76			*/
77			fromDataURI(dataURI) {
78			this.fromBase64(dataURI.replace('data:audio/wav;base64,', ''));
79			}
80
81			/**
82			* Write a RIFF tag in the INFO chunk. If the tag do not exist,
83			* then it is created. It if exists, it is overwritten.
84			* @param {string} tag The tag name.
85			* @param {string} value The tag value.
86			* @throws {Error} If the tag name is not valid.
87			*/
88			setTag(tag, value) {
89			tag = fixRIFFTag(tag);
90			/** @type {!Object} */
91			let index = this.getTagIndex_(tag);
92			if (index.TAG !== null) {
93			this.LIST[index.LIST].subChunks[index.TAG].chunkSize =
94			value.length + 1;
95			this.LIST[index.LIST].subChunks[index.TAG].value = value;
96			} else if (index.LIST !== null) {
97			this.LIST[index.LIST].subChunks.push({
98			chunkId: tag,
99			chunkSize: value.length + 1,
100			value: value});
101			} else {
102			this.LIST.push({
103			chunkId: 'LIST',
104			chunkSize: 8 + value.length + 1,
105			format: 'INFO',
106			subChunks: []});
107			this.LIST[this.LIST.length - 1].subChunks.push({
108			chunkId: tag,
109			chunkSize: value.length + 1,
110			value: value});
111			}
112			}
113
114			/**
115			* Return the value of a RIFF tag in the INFO chunk.
116			* @param {string} tag The tag name.
117			* @return {?string} The value if the tag is found, null otherwise.
118			*/
119			getTag(tag) {
120			/** @type {!Object} */
121			let index = this.getTagIndex_(tag);
122			if (index.TAG !== null) {
123			return this.LIST[index.LIST].subChunks[index.TAG].value;
124			}
125			return null;
126			}
127
128			/**
129			* Return a Object<tag, value> with the RIFF tags in the file.
130			* @return {!Object<string, string>} The file tags.
131			*/
132			listTags() {
133			/** @type {?number} */
134			let index = this.getLISTINFOIndex_();
135			/** @type {!Object} */
136			let tags = {};
137			if (index !== null) {
138			for (let i = 0, len = this.LIST[index].subChunks.length; i < len; i++) {
139			tags[this.LIST[index].subChunks[i].chunkId] =
140			this.LIST[index].subChunks[i].value;
141			}
142			}
143			return tags;
144			}
145
146			/**
147			* Remove a RIFF tag from the INFO chunk.
148			* @param {string} tag The tag name.
149			* @return {boolean} True if a tag was deleted.
150			*/
151			deleteTag(tag) {
152			/** @type {!Object} */
153			let index = this.getTagIndex_(tag);
154			if (index.TAG !== null) {
155			this.LIST[index.LIST].subChunks.splice(index.TAG, 1);
156			return true;
157			}
158			return false;
159			}
160
161			/**
162			* Create a cue point in the wave file.
163			* @param {number} position The cue point position in milliseconds.
164			* @param {string} labl The LIST adtl labl text of the marker. Optional.
165			*/
166			setCuePoint(position, labl='') {
167			this.cue.chunkId = 'cue ';
168			position = (position * this.fmt.sampleRate) / 1000;
169			/** @type {!Array<!Object>} */
170			let existingPoints = this.getCuePoints_();
171			this.clearLISTadtl_();
172			/** @type {number} */
173			let len = this.cue.points.length;
174			this.cue.points = [];
175			/** @type {boolean} */
176			let hasSet = false;
177			if (len === 0) {
178			this.setCuePoint_(position, 1, labl);
179			} else {
180			for (let i = 0; i < len; i++) {
181			if (existingPoints[i].dwPosition > position && !hasSet) {
182			this.setCuePoint_(position, i + 1, labl);
183			this.setCuePoint_(
184			existingPoints[i].dwPosition,
185			i + 2,
186			existingPoints[i].label);
187			hasSet = true;
188			} else {
189			this.setCuePoint_(
190			existingPoints[i].dwPosition,
191			i + 1,
192			existingPoints[i].label);
193			}
194			}
195			if (!hasSet) {
196			this.setCuePoint_(position, this.cue.points.length + 1, labl);
197			}
198			}
199			this.cue.dwCuePoints = this.cue.points.length;
200			}
201
202			/**
203			* Remove a cue point from a wave file.
204			* @param {number} index the index of the point. First is 1,
205			* second is 2, and so on.
206			*/
207			deleteCuePoint(index) {
208			this.cue.chunkId = 'cue ';
209			/** @type {!Array<!Object>} */
210			let existingPoints = this.getCuePoints_();
211			this.clearLISTadtl_();
212			/** @type {number} */
213			let len = this.cue.points.length;
214			this.cue.points = [];
215			for (let i = 0; i < len; i++) {
216			if (i + 1 !== index) {
217			this.setCuePoint_(
218			existingPoints[i].dwPosition,
219			i + 1,
220			existingPoints[i].label);
221			}
222			}
223			this.cue.dwCuePoints = this.cue.points.length;
224			if (this.cue.dwCuePoints) {
225			this.cue.chunkId = 'cue ';
226			} else {
227			this.cue.chunkId = '';
228			this.clearLISTadtl_();
229			}
230			}
231
232			/**
233			* Return an array with all cue points in the file, in the order they appear
234			* in the file.
235			* The difference between this method and using the list in WaveFile.cue
236			* is that the return value of this method includes the position in
237			* milliseconds of each cue point (WaveFile.cue only have the sample offset)
238			* @return {!Array<!Object>}
239			*/
240			listCuePoints() {
241			/** @type {!Array<!Object>} */
242			let points = this.getCuePoints_();
243			for (let i = 0, len = points.length; i < len; i++) {
244			points[i].milliseconds =
245			(points[i].dwPosition / this.fmt.sampleRate) * 1000;
246			}
247			return points;
248			}
249
250			/**
251			* Update the label of a cue point.
252			* @param {number} pointIndex The ID of the cue point.
253			* @param {string} label The new text for the label.
254			*/
255			updateLabel(pointIndex, label) {
256			/** @type {?number} */
257			let cIndex = this.getAdtlChunk_();
258			if (cIndex !== null) {
259			for (let i = 0, len = this.LIST[cIndex].subChunks.length; i < len; i++) {
260			if (this.LIST[cIndex].subChunks[i].dwName ==
261			pointIndex) {
262			this.LIST[cIndex].subChunks[i].value = label;
263			}
264			}
265			}
266			}
267
268			/**
269			* Push a new cue point in this.cue.points.
270			* @param {number} position The position in milliseconds.
271			* @param {number} dwName the dwName of the cue point
272			* @private
273			*/
274			setCuePoint_(position, dwName, label) {
275			this.cue.points.push({
276			dwName: dwName,
277			dwPosition: position,
278			fccChunk: 'data',
279			dwChunkStart: 0,
280			dwBlockStart: 0,
281			dwSampleOffset: position,
282			});
283			this.setLabl_(dwName, label);
284			}
285
286			/**
287			* Return an array with all cue points in the file, in the order they appear
288			* in the file.
289			* @return {!Array<!Object>}
290			* @private
291			*/
292			getCuePoints_() {
293			/** @type {!Array<!Object>} */
294			let points = [];
295			for (let i = 0, len = this.cue.points.length; i < len; i++) {
296			points.push({
297			dwPosition: this.cue.points[i].dwPosition,
298			label: this.getLabelForCuePoint_(
299			this.cue.points[i].dwName)});
300			}
301			return points;
302			}
303
304			/**
305			* Return the label of a cue point.
306			* @param {number} pointDwName The ID of the cue point.
307			* @return {string}
308			* @private
309			*/
310			getLabelForCuePoint_(pointDwName) {
311			/** @type {?number} */
312			let cIndex = this.getAdtlChunk_();
313			if (cIndex !== null) {
314			for (let i = 0, len = this.LIST[cIndex].subChunks.length; i < len; i++) {
315			if (this.LIST[cIndex].subChunks[i].dwName ==
316			pointDwName) {
317			return this.LIST[cIndex].subChunks[i].value;
318			}
319			}
320			}
321			return '';
322			}
323
324			/**
325			* Clear any LIST chunk labeled as 'adtl'.
326			* @private
327			*/
328			clearLISTadtl_() {
329			for (let i = 0, len = this.LIST.length; i < len; i++) {
330			if (this.LIST[i].format == 'adtl') {
331			this.LIST.splice(i);
332			}
333			}
334			}
335
336			/**
337			* Create a new 'labl' subchunk in a 'LIST' chunk of type 'adtl'.
338			* @param {number} dwName The ID of the cue point.
339			* @param {string} label The label for the cue point.
340			* @private
341			*/
342			setLabl_(dwName, label) {
343			/** @type {?number} */
344			let adtlIndex = this.getAdtlChunk_();
345			if (adtlIndex === null) {
346			this.LIST.push({
347			chunkId: 'LIST',
348			chunkSize: 4,
349			format: 'adtl',
350			subChunks: []});
351			adtlIndex = this.LIST.length - 1;
352			}
353			this.setLabelText_(adtlIndex === null ? 0 : adtlIndex, dwName, label);
354			}
355
356			/**
357			* Create a new 'labl' subchunk in a 'LIST' chunk of type 'adtl'.
358			* @param {number} adtlIndex The index of the 'adtl' LIST in this.LIST.
359			* @param {number} dwName The ID of the cue point.
360			* @param {string} label The label for the cue point.
361			* @private
362			*/
363			setLabelText_(adtlIndex, dwName, label) {
364			this.LIST[adtlIndex].subChunks.push({
365			chunkId: 'labl',
366			chunkSize: label.length,
367			dwName: dwName,
368			value: label
369			});
370			this.LIST[adtlIndex].chunkSize += label.length + 4 + 4 + 4 + 1;
371			}
372
373			/**
374			* Return the index of the 'adtl' LIST in this.LIST.
375			* @return {?number}
376			* @private
377			*/
378			getAdtlChunk_() {
379			for (let i = 0, len = this.LIST.length; i < len; i++) {
380			if (this.LIST[i].format == 'adtl') {
381			return i;
382			}
383			}
384			return null;
385			}
386
387			/**
388			* Return the index of the INFO chunk in the LIST chunk.
389			* @return {?number} the index of the INFO chunk.
390			* @private
391			*/
392			getLISTINFOIndex_() {
393			/** @type {?number} */
394			let index = null;
395			for (let i = 0, len = this.LIST.length; i < len; i++) {
396			if (this.LIST[i].format === 'INFO') {
397			index = i;
398			break;
399			}
400			}
401			return index;
402			}
403
404			/**
405			* Return the index of a tag in a FILE chunk.
406			* @param {string} tag The tag name.
407			* @return {!Object<string, ?number>}
408			* Object.LIST is the INFO index in LIST
409			* Object.TAG is the tag index in the INFO
410			* @private
411			*/
412			getTagIndex_(tag) {
413			/** @type {!Object<string, ?number>} */
414			let index = {LIST: null, TAG: null};
415			for (let i = 0, len = this.LIST.length; i < len; i++) {
416			if (this.LIST[i].format == 'INFO') {
417			index.LIST = i;
418			for (let j=0, subLen = this.LIST[i].subChunks.length; j < subLen; j++) {
419			if (this.LIST[i].subChunks[j].chunkId == tag) {
420			index.TAG = j;
421			break;
422			}
423			}
424			break;
425			}
426			}
427			return index;
428			}
429			}
430

rochars / wavefile

Push — master ( 317dbe...83670a )

WaveFile C

Complexity

Size/Duplication

Importance

21 Functions

How to fix Complexity

Complexity

Duplication Side-by-Side

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