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 WaveFileMetaEditor class. |
27
|
|
|
* @see https://github.com/rochars/wavefile |
28
|
|
|
*/ |
29
|
|
|
|
30
|
|
|
import { WaveFileCreator } from './wavefile-creator'; |
31
|
|
|
import fixRIFFTag from './fix-riff-tag'; |
32
|
|
|
|
33
|
|
|
/** |
34
|
|
|
* A class to edit meta information in wav files. |
35
|
|
|
* @extends WaveFileCreator |
36
|
|
|
* @ignore |
37
|
|
|
*/ |
38
|
|
|
export class WaveFileMetaEditor extends WaveFileCreator { |
39
|
|
|
|
40
|
|
|
/** |
41
|
|
|
* Return the value of a RIFF tag in the INFO chunk. |
42
|
|
|
* @param {string} tag The tag name. |
43
|
|
|
* @return {?string} The value if the tag is found, null otherwise. |
44
|
|
|
*/ |
45
|
|
|
getTag(tag) { |
46
|
|
|
/** @type {!Object} */ |
47
|
|
|
let index = this.getTagIndex_(tag); |
48
|
|
|
if (index.TAG !== null) { |
49
|
|
|
return this.LIST[index.LIST].subChunks[index.TAG].value; |
50
|
|
|
} |
51
|
|
|
return null; |
52
|
|
|
} |
53
|
|
|
|
54
|
|
|
/** |
55
|
|
|
* Write a RIFF tag in the INFO chunk. If the tag do not exist, |
56
|
|
|
* then it is created. It if exists, it is overwritten. |
57
|
|
|
* @param {string} tag The tag name. |
58
|
|
|
* @param {string} value The tag value. |
59
|
|
|
* @throws {Error} If the tag name is not valid. |
60
|
|
|
*/ |
61
|
|
|
setTag(tag, value) { |
62
|
|
|
tag = fixRIFFTag(tag); |
63
|
|
|
/** @type {!Object} */ |
64
|
|
|
let index = this.getTagIndex_(tag); |
65
|
|
|
if (index.TAG !== null) { |
66
|
|
|
this.LIST[index.LIST].subChunks[index.TAG].chunkSize = |
67
|
|
|
value.length + 1; |
68
|
|
|
this.LIST[index.LIST].subChunks[index.TAG].value = value; |
69
|
|
|
} else if (index.LIST !== null) { |
70
|
|
|
this.LIST[index.LIST].subChunks.push({ |
71
|
|
|
chunkId: tag, |
72
|
|
|
chunkSize: value.length + 1, |
73
|
|
|
value: value}); |
74
|
|
|
} else { |
75
|
|
|
this.LIST.push({ |
76
|
|
|
chunkId: 'LIST', |
77
|
|
|
chunkSize: 8 + value.length + 1, |
78
|
|
|
format: 'INFO', |
79
|
|
|
subChunks: []}); |
80
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push({ |
81
|
|
|
chunkId: tag, |
82
|
|
|
chunkSize: value.length + 1, |
83
|
|
|
value: value}); |
84
|
|
|
} |
85
|
|
|
} |
86
|
|
|
|
87
|
|
|
/** |
88
|
|
|
* Remove a RIFF tag from the INFO chunk. |
89
|
|
|
* @param {string} tag The tag name. |
90
|
|
|
* @return {boolean} True if a tag was deleted. |
91
|
|
|
*/ |
92
|
|
|
deleteTag(tag) { |
93
|
|
|
/** @type {!Object} */ |
94
|
|
|
let index = this.getTagIndex_(tag); |
95
|
|
|
if (index.TAG !== null) { |
96
|
|
|
this.LIST[index.LIST].subChunks.splice(index.TAG, 1); |
97
|
|
|
return true; |
98
|
|
|
} |
99
|
|
|
return false; |
100
|
|
|
} |
101
|
|
|
|
102
|
|
|
/** |
103
|
|
|
* Return a Object<tag, value> with the RIFF tags in the file. |
104
|
|
|
* @return {!Object<string, string>} The file tags. |
105
|
|
|
*/ |
106
|
|
|
listTags() { |
107
|
|
|
/** @type {?number} */ |
108
|
|
|
let index = this.getLISTINFOIndex_(); |
109
|
|
|
/** @type {!Object} */ |
110
|
|
|
let tags = {}; |
111
|
|
|
if (index !== null) { |
112
|
|
|
for (let i = 0, len = this.LIST[index].subChunks.length; i < len; i++) { |
113
|
|
|
tags[this.LIST[index].subChunks[i].chunkId] = |
114
|
|
|
this.LIST[index].subChunks[i].value; |
115
|
|
|
} |
116
|
|
|
} |
117
|
|
|
return tags; |
118
|
|
|
} |
119
|
|
|
|
120
|
|
|
/** |
121
|
|
|
* Return an array with all cue points in the file, in the order they appear |
122
|
|
|
* in the file. |
123
|
|
|
* Objects representing cue points/regions look like this: |
124
|
|
|
* { |
125
|
|
|
* position: 500, // the position in milliseconds |
126
|
|
|
* label: 'cue marker 1', |
127
|
|
|
* end: 1500, // the end position in milliseconds |
128
|
|
|
* dwName: 1, |
129
|
|
|
* dwPosition: 0, |
130
|
|
|
* fccChunk: 'data', |
131
|
|
|
* dwChunkStart: 0, |
132
|
|
|
* dwBlockStart: 0, |
133
|
|
|
* dwSampleOffset: 22050, // the position as a sample offset |
134
|
|
|
* dwSampleLength: 3646827, // length as a sample count, 0 if not a region |
135
|
|
|
* dwPurposeID: 544106354, |
136
|
|
|
* dwCountry: 0, |
137
|
|
|
* dwLanguage: 0, |
138
|
|
|
* dwDialect: 0, |
139
|
|
|
* dwCodePage: 0, |
140
|
|
|
* } |
141
|
|
|
* @return {!Array<Object>} |
142
|
|
|
*/ |
143
|
|
|
listCuePoints() { |
144
|
|
|
/** @type {!Array<!Object>} */ |
145
|
|
|
let points = this.getCuePoints_(); |
146
|
|
|
for (let i = 0, len = points.length; i < len; i++) { |
147
|
|
|
|
148
|
|
|
// Add attrs that should exist in the object |
149
|
|
|
points[i].position = |
150
|
|
|
(points[i].dwSampleOffset / this.fmt.sampleRate) * 1000; |
151
|
|
|
|
152
|
|
|
// If it is a region, calc the end |
153
|
|
|
// position in milliseconds |
154
|
|
|
if (points[i].dwSampleLength) { |
155
|
|
|
points[i].end = |
156
|
|
|
(points[i].dwSampleLength / this.fmt.sampleRate) * 1000; |
157
|
|
|
points[i].end += points[i].position; |
158
|
|
|
// If its not a region, end should be null |
159
|
|
|
} else { |
160
|
|
|
points[i].end = null; |
161
|
|
|
} |
162
|
|
|
|
163
|
|
|
// Remove attrs that should not go in the results |
164
|
|
|
delete points[i].value; |
165
|
|
|
} |
166
|
|
|
return points; |
167
|
|
|
} |
168
|
|
|
|
169
|
|
|
/** |
170
|
|
|
* Create a cue point in the wave file. |
171
|
|
|
* @param {!{ |
172
|
|
|
* position: number, |
173
|
|
|
* label: ?string, |
174
|
|
|
* end: ?number, |
175
|
|
|
* dwPurposeID: ?number, |
176
|
|
|
* dwCountry: ?number, |
177
|
|
|
* dwLanguage: ?number, |
178
|
|
|
* dwDialect: ?number, |
179
|
|
|
* dwCodePage: ?number |
180
|
|
|
* }} pointData A object with the data of the cue point. |
181
|
|
|
* |
182
|
|
|
* # Only required attribute to create a cue point: |
183
|
|
|
* pointData.position: The position of the point in milliseconds |
184
|
|
|
* |
185
|
|
|
* # Optional attribute for cue points: |
186
|
|
|
* pointData.label: A string label for the cue point |
187
|
|
|
* |
188
|
|
|
* # Extra data used for regions |
189
|
|
|
* pointData.end: A number representing the end of the region, |
190
|
|
|
* in milliseconds, counting from the start of the file. If |
191
|
|
|
* no end attr is specified then no region is created. |
192
|
|
|
* |
193
|
|
|
* # You may also specify the following attrs for regions, all optional: |
194
|
|
|
* pointData.dwPurposeID |
195
|
|
|
* pointData.dwCountry |
196
|
|
|
* pointData.dwLanguage |
197
|
|
|
* pointData.dwDialect |
198
|
|
|
* pointData.dwCodePage |
199
|
|
|
*/ |
200
|
|
|
setCuePoint(pointData) { |
201
|
|
|
this.cue.chunkId = 'cue '; |
202
|
|
|
|
203
|
|
|
// label attr should always exist |
204
|
|
|
if (!pointData.label) { |
205
|
|
|
pointData.label = ''; |
206
|
|
|
} |
207
|
|
|
|
208
|
|
|
/** |
209
|
|
|
* Load the existing points before erasing |
210
|
|
|
* the LIST 'adtl' chunk and the cue attr |
211
|
|
|
* @type {!Array<!Object>} |
212
|
|
|
*/ |
213
|
|
|
let existingPoints = this.getCuePoints_(); |
214
|
|
|
|
215
|
|
|
// Clear any LIST labeled 'adtl' |
216
|
|
|
// The LIST chunk should be re-written |
217
|
|
|
// after the new cue point is created |
218
|
|
|
this.clearLISTadtl_(); |
219
|
|
|
|
220
|
|
|
/** |
221
|
|
|
* Get the current len of the cue points |
222
|
|
|
* in the file before erasing the cue attr |
223
|
|
|
* @type {number} |
224
|
|
|
*/ |
225
|
|
|
let len = this.cue.points.length; |
226
|
|
|
|
227
|
|
|
// Erase this.cue so it can be re-written |
228
|
|
|
// after the point is added |
229
|
|
|
this.cue.points = []; |
230
|
|
|
|
231
|
|
|
/** |
232
|
|
|
* Cue position param is informed in milliseconds, |
233
|
|
|
* here its value is converted to the sample offset |
234
|
|
|
* @type {number} |
235
|
|
|
*/ |
236
|
|
|
pointData.dwSampleOffset = |
237
|
|
|
(pointData.position * this.fmt.sampleRate) / 1000; |
238
|
|
|
/** |
239
|
|
|
* end param is informed in milliseconds, counting |
240
|
|
|
* from the start of the file. |
241
|
|
|
* here its value is converted to the sample length |
242
|
|
|
* of the region. |
243
|
|
|
* @type {number} |
244
|
|
|
*/ |
245
|
|
|
pointData.dwSampleLength = 0; |
246
|
|
|
if (pointData.end) { |
247
|
|
|
pointData.dwSampleLength = |
248
|
|
|
((pointData.end * this.fmt.sampleRate) / 1000) - |
249
|
|
|
pointData.dwSampleOffset; |
250
|
|
|
} |
251
|
|
|
|
252
|
|
|
// If there were no cue points in the file, |
253
|
|
|
// insert the new cue point as the first |
254
|
|
|
if (len === 0) { |
255
|
|
|
this.setCuePoint_(pointData, 1); |
256
|
|
|
|
257
|
|
|
// If the file already had cue points, This new one |
258
|
|
|
// must be added in the list according to its position. |
259
|
|
|
} else { |
260
|
|
|
|
261
|
|
|
/** @type {boolean} */ |
262
|
|
|
let hasSet = false; |
263
|
|
|
|
264
|
|
|
// Iterate over the cue points that existed |
265
|
|
|
// before this one was added |
266
|
|
|
for (let i = 0; i < len; i++) { |
267
|
|
|
|
268
|
|
|
// If the new point is located before this original point |
269
|
|
|
// and the new point have not been created, create the |
270
|
|
|
// new point and then the original point |
271
|
|
|
if (existingPoints[i].dwSampleOffset > |
272
|
|
|
pointData.dwSampleOffset && !hasSet) { |
273
|
|
|
// create the new point |
274
|
|
|
this.setCuePoint_(pointData, i + 1); |
275
|
|
|
|
276
|
|
|
// create the original point |
277
|
|
|
this.setCuePoint_(existingPoints[i], i + 2); |
278
|
|
|
hasSet = true; |
279
|
|
|
|
280
|
|
|
// Otherwise, re-create the original point |
281
|
|
|
} else { |
282
|
|
|
this.setCuePoint_(existingPoints[i], hasSet ? i + 2 : i + 1); |
283
|
|
|
} |
284
|
|
|
} |
285
|
|
|
// If no point was created in the above loop, |
286
|
|
|
// create the new point as the last one |
287
|
|
|
if (!hasSet) { |
288
|
|
|
this.setCuePoint_(pointData, this.cue.points.length + 1); |
289
|
|
|
} |
290
|
|
|
} |
291
|
|
|
this.cue.dwCuePoints = this.cue.points.length; |
292
|
|
|
} |
293
|
|
|
|
294
|
|
|
/** |
295
|
|
|
* Remove a cue point from a wave file. |
296
|
|
|
* @param {number} index the index of the point. First is 1, |
297
|
|
|
* second is 2, and so on. |
298
|
|
|
*/ |
299
|
|
|
deleteCuePoint(index) { |
300
|
|
|
this.cue.chunkId = 'cue '; |
301
|
|
|
/** @type {!Array<!Object>} */ |
302
|
|
|
let existingPoints = this.getCuePoints_(); |
303
|
|
|
this.clearLISTadtl_(); |
304
|
|
|
/** @type {number} */ |
305
|
|
|
let len = this.cue.points.length; |
306
|
|
|
this.cue.points = []; |
307
|
|
|
for (let i = 0; i < len; i++) { |
308
|
|
|
if (i + 1 !== index) { |
309
|
|
|
this.setCuePoint_(existingPoints[i], i + 1); |
310
|
|
|
} |
311
|
|
|
} |
312
|
|
|
this.cue.dwCuePoints = this.cue.points.length; |
313
|
|
|
if (this.cue.dwCuePoints) { |
314
|
|
|
this.cue.chunkId = 'cue '; |
315
|
|
|
} else { |
316
|
|
|
this.cue.chunkId = ''; |
317
|
|
|
this.clearLISTadtl_(); |
318
|
|
|
} |
319
|
|
|
} |
320
|
|
|
|
321
|
|
|
/** |
322
|
|
|
* Update the label of a cue point. |
323
|
|
|
* @param {number} pointIndex The ID of the cue point. |
324
|
|
|
* @param {string} label The new text for the label. |
325
|
|
|
*/ |
326
|
|
|
updateLabel(pointIndex, label) { |
327
|
|
|
/** @type {?number} */ |
328
|
|
|
let cIndex = this.getAdtlChunk_(); |
329
|
|
|
if (cIndex !== null) { |
330
|
|
|
for (let i = 0, len = this.LIST[cIndex].subChunks.length; i < len; i++) { |
331
|
|
|
if (this.LIST[cIndex].subChunks[i].dwName == |
332
|
|
|
pointIndex) { |
333
|
|
|
this.LIST[cIndex].subChunks[i].value = label; |
334
|
|
|
} |
335
|
|
|
} |
336
|
|
|
} |
337
|
|
|
} |
338
|
|
|
|
339
|
|
|
/** |
340
|
|
|
* Return an array with all cue points in the file, in the order they appear |
341
|
|
|
* in the file. |
342
|
|
|
* @return {!Array<!Object>} |
343
|
|
|
* @private |
344
|
|
|
*/ |
345
|
|
|
getCuePoints_() { |
346
|
|
|
/** @type {!Array<!Object>} */ |
347
|
|
|
let points = []; |
348
|
|
|
for (let i = 0; i < this.cue.points.length; i++) { |
349
|
|
|
/** @type {!Object} */ |
350
|
|
|
let chunk = this.cue.points[i]; |
351
|
|
|
/** @type {!Object} */ |
352
|
|
|
let pointData = this.getDataForCuePoint_(chunk.dwName); |
353
|
|
|
pointData.label = pointData.value ? pointData.value : ''; |
354
|
|
|
pointData.dwPosition = chunk.dwPosition; |
355
|
|
|
pointData.fccChunk = chunk.fccChunk; |
356
|
|
|
pointData.dwChunkStart = chunk.dwChunkStart; |
357
|
|
|
pointData.dwBlockStart = chunk.dwBlockStart; |
358
|
|
|
pointData.dwSampleOffset = chunk.dwSampleOffset; |
359
|
|
|
points.push(pointData); |
360
|
|
|
} |
361
|
|
|
return points; |
362
|
|
|
} |
363
|
|
|
|
364
|
|
|
/** |
365
|
|
|
* Return the associated data of a cue point. |
366
|
|
|
* @param {number} pointDwName The ID of the cue point. |
367
|
|
|
* @return {!Object} |
368
|
|
|
* @private |
369
|
|
|
*/ |
370
|
|
|
getDataForCuePoint_(pointDwName) { |
371
|
|
|
/** @type {?number} */ |
372
|
|
|
let cIndex = this.getAdtlChunk_(); |
373
|
|
|
/** @type {!Object} */ |
374
|
|
|
let pointData = {}; |
375
|
|
|
if (cIndex !== null) { |
376
|
|
|
// got through all chunks in the adtl LIST checking |
377
|
|
|
// for references to this cue point |
378
|
|
|
for (let i = 0, len = this.LIST[cIndex].subChunks.length; i < len; i++) { |
379
|
|
|
if (this.LIST[cIndex].subChunks[i].dwName == |
380
|
|
|
pointDwName && this.LIST[cIndex].subChunks[i].chunkId) { |
381
|
|
|
/** @type {!Object} */ |
382
|
|
|
let chunk = this.LIST[cIndex].subChunks[i]; |
383
|
|
|
// Some chunks may reference the point but |
384
|
|
|
// have a empty text; this is to ensure that if |
385
|
|
|
// one chunk that reference the point has a text, |
386
|
|
|
// this value will be kept as the associated data label |
387
|
|
|
// for the cue point. |
388
|
|
|
// If different values are present, the last value found |
389
|
|
|
// will be considered the label for the cue point. |
390
|
|
|
pointData.value = chunk.value ? chunk.value : pointData.value; |
391
|
|
|
pointData.dwName = chunk.dwName ? chunk.dwName : 0; |
392
|
|
|
pointData.dwSampleLength = |
393
|
|
|
chunk.dwSampleLength ? chunk.dwSampleLength : 0; |
394
|
|
|
pointData.dwPurposeID = chunk.dwPurposeID ? chunk.dwPurposeID : 0; |
395
|
|
|
pointData.dwCountry = chunk.dwCountry ? chunk.dwCountry : 0; |
396
|
|
|
pointData.dwLanguage = chunk.dwLanguage ? chunk.dwLanguage : 0; |
397
|
|
|
pointData.dwDialect = chunk.dwDialect ? chunk.dwDialect : 0; |
398
|
|
|
pointData.dwCodePage = chunk.dwCodePage ? chunk.dwCodePage : 0; |
399
|
|
|
} |
400
|
|
|
} |
401
|
|
|
} |
402
|
|
|
return pointData; |
403
|
|
|
} |
404
|
|
|
|
405
|
|
|
/** |
406
|
|
|
* Return the index of the INFO chunk in the LIST chunk. |
407
|
|
|
* @return {?number} the index of the INFO chunk. |
408
|
|
|
* @private |
409
|
|
|
*/ |
410
|
|
|
getLISTINFOIndex_() { |
411
|
|
|
/** @type {?number} */ |
412
|
|
|
let index = null; |
413
|
|
|
for (let i = 0, len = this.LIST.length; i < len; i++) { |
414
|
|
|
if (this.LIST[i].format === 'INFO') { |
415
|
|
|
index = i; |
416
|
|
|
break; |
417
|
|
|
} |
418
|
|
|
} |
419
|
|
|
return index; |
420
|
|
|
} |
421
|
|
|
|
422
|
|
|
/** |
423
|
|
|
* Return the index of the 'adtl' LIST in this.LIST. |
424
|
|
|
* @return {?number} |
425
|
|
|
* @private |
426
|
|
|
*/ |
427
|
|
|
getAdtlChunk_() { |
428
|
|
|
for (let i = 0, len = this.LIST.length; i < len; i++) { |
429
|
|
|
if (this.LIST[i].format == 'adtl') { |
430
|
|
|
return i; |
431
|
|
|
} |
432
|
|
|
} |
433
|
|
|
return null; |
434
|
|
|
} |
435
|
|
|
|
436
|
|
|
/** |
437
|
|
|
* Return the index of a tag in a FILE chunk. |
438
|
|
|
* @param {string} tag The tag name. |
439
|
|
|
* @return {!Object<string, ?number>} |
440
|
|
|
* Object.LIST is the INFO index in LIST |
441
|
|
|
* Object.TAG is the tag index in the INFO |
442
|
|
|
* @private |
443
|
|
|
*/ |
444
|
|
|
getTagIndex_(tag) { |
445
|
|
|
/** @type {!Object<string, ?number>} */ |
446
|
|
|
let index = {LIST: null, TAG: null}; |
447
|
|
|
for (let i = 0, len = this.LIST.length; i < len; i++) { |
448
|
|
|
if (this.LIST[i].format == 'INFO') { |
449
|
|
|
index.LIST = i; |
450
|
|
|
for (let j=0, subLen = this.LIST[i].subChunks.length; j < subLen; j++) { |
451
|
|
|
if (this.LIST[i].subChunks[j].chunkId == tag) { |
452
|
|
|
index.TAG = j; |
453
|
|
|
break; |
454
|
|
|
} |
455
|
|
|
} |
456
|
|
|
break; |
457
|
|
|
} |
458
|
|
|
} |
459
|
|
|
return index; |
460
|
|
|
} |
461
|
|
|
|
462
|
|
|
/** |
463
|
|
|
* Push a new cue point in this.cue.points. |
464
|
|
|
* @param {!Object} pointData A object with data of the cue point. |
465
|
|
|
* @param {number} dwName the dwName of the cue point |
466
|
|
|
* @private |
467
|
|
|
*/ |
468
|
|
|
setCuePoint_(pointData, dwName) { |
469
|
|
|
this.cue.points.push({ |
470
|
|
|
dwName: dwName, |
471
|
|
|
dwPosition: pointData.dwPosition ? pointData.dwPosition : 0, |
472
|
|
|
fccChunk: pointData.fccChunk ? pointData.fccChunk : 'data', |
473
|
|
|
dwChunkStart: pointData.dwChunkStart ? pointData.dwChunkStart : 0, |
474
|
|
|
dwBlockStart: pointData.dwBlockStart ? pointData.dwBlockStart : 0, |
475
|
|
|
dwSampleOffset: pointData.dwSampleOffset |
476
|
|
|
}); |
477
|
|
|
this.setLabl_(pointData, dwName); |
478
|
|
|
} |
479
|
|
|
|
480
|
|
|
/** |
481
|
|
|
* Clear any LIST chunk labeled as 'adtl'. |
482
|
|
|
* @private |
483
|
|
|
*/ |
484
|
|
|
clearLISTadtl_() { |
485
|
|
|
for (let i = 0, len = this.LIST.length; i < len; i++) { |
486
|
|
|
if (this.LIST[i].format == 'adtl') { |
487
|
|
|
this.LIST.splice(i); |
488
|
|
|
} |
489
|
|
|
} |
490
|
|
|
} |
491
|
|
|
|
492
|
|
|
/** |
493
|
|
|
* Create a new 'labl' subchunk in a 'LIST' chunk of type 'adtl'. |
494
|
|
|
* This method creates a LIST adtl chunk in the file if one |
495
|
|
|
* is not present. |
496
|
|
|
* @param {!Object} pointData A object with data of the cue point. |
497
|
|
|
* @param {number} dwName The ID of the cue point. |
498
|
|
|
* @private |
499
|
|
|
*/ |
500
|
|
|
setLabl_(pointData, dwName) { |
501
|
|
|
/** |
502
|
|
|
* Get the index of the LIST chunk labeled as adtl. |
503
|
|
|
* A file can have many LIST chunks with unique labels. |
504
|
|
|
* @type {?number} |
505
|
|
|
*/ |
506
|
|
|
let adtlIndex = this.getAdtlChunk_(); |
507
|
|
|
// If there is no adtl LIST, create one |
508
|
|
|
if (adtlIndex === null) { |
509
|
|
|
// Include a new item LIST chunk |
510
|
|
|
this.LIST.push({ |
511
|
|
|
chunkId: 'LIST', |
512
|
|
|
chunkSize: 4, |
513
|
|
|
format: 'adtl', |
514
|
|
|
subChunks: []}); |
515
|
|
|
// Get the index of the new LIST chunk |
516
|
|
|
adtlIndex = this.LIST.length - 1; |
517
|
|
|
} |
518
|
|
|
this.setLabelText_(adtlIndex, pointData, dwName); |
519
|
|
|
if (pointData.dwSampleLength) { |
520
|
|
|
this.setLtxtChunk_(adtlIndex, pointData, dwName); |
521
|
|
|
} |
522
|
|
|
} |
523
|
|
|
|
524
|
|
|
/** |
525
|
|
|
* Create a new 'labl' subchunk in a 'LIST' chunk of type 'adtl'. |
526
|
|
|
* @param {number} adtlIndex The index of the 'adtl' LIST in this.LIST. |
527
|
|
|
* @param {!Object} pointData A object with data of the cue point. |
528
|
|
|
* @param {number} dwName The ID of the cue point. |
529
|
|
|
* @private |
530
|
|
|
*/ |
531
|
|
|
setLabelText_(adtlIndex, pointData, dwName) { |
532
|
|
|
this.LIST[adtlIndex].subChunks.push({ |
533
|
|
|
chunkId: 'labl', |
534
|
|
|
chunkSize: 4, // should be 4 + label length in bytes |
535
|
|
|
dwName: dwName, |
536
|
|
|
value: pointData.label |
537
|
|
|
}); |
538
|
|
|
this.LIST[adtlIndex].chunkSize += 12; // should be 4 + label byte length |
539
|
|
|
} |
540
|
|
|
/** |
541
|
|
|
* Create a new 'ltxt' subchunk in a 'LIST' chunk of type 'adtl'. |
542
|
|
|
* @param {number} adtlIndex The index of the 'adtl' LIST in this.LIST. |
543
|
|
|
* @param {!Object} pointData A object with data of the cue point. |
544
|
|
|
* @param {number} dwName The ID of the cue point. |
545
|
|
|
* @private |
546
|
|
|
*/ |
547
|
|
|
setLtxtChunk_(adtlIndex, pointData, dwName) { |
548
|
|
|
this.LIST[adtlIndex].subChunks.push({ |
549
|
|
|
chunkId: 'ltxt', |
550
|
|
|
chunkSize: 20, // should be 12 + label byte length |
551
|
|
|
dwName: dwName, |
552
|
|
|
dwSampleLength: pointData.dwSampleLength, |
553
|
|
|
dwPurposeID: pointData.dwPurposeID ? pointData.dwPurposeID : 0, |
554
|
|
|
dwCountry: pointData.dwCountry ? pointData.dwCountry : 0, |
555
|
|
|
dwLanguage: pointData.dwLanguage ? pointData.dwLanguage : 0, |
556
|
|
|
dwDialect: pointData.dwDialect ? pointData.dwDialect : 0, |
557
|
|
|
dwCodePage: pointData.dwCodePage ? pointData.dwCodePage : 0, |
558
|
|
|
value: pointData.label // kept for compatibility |
559
|
|
|
}); |
560
|
|
|
this.LIST[adtlIndex].chunkSize += 28; |
561
|
|
|
} |
562
|
|
|
} |
563
|
|
|
|