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 WaveFileParser class. |
27
|
|
|
* @see https://github.com/rochars/wavefile |
28
|
|
|
*/ |
29
|
|
|
|
30
|
|
|
import RIFFFile from './riff-file'; |
31
|
|
|
import writeString from './write-string'; |
32
|
|
|
import {packTo, packStringTo, packString, pack} from 'byte-data'; |
33
|
|
|
|
34
|
|
|
/** |
35
|
|
|
* A class to read and write wav files. |
36
|
|
|
*/ |
37
|
|
|
export default class WaveFileParser extends RIFFFile { |
38
|
|
|
|
39
|
|
|
constructor() { |
40
|
|
|
super(); |
41
|
|
|
/** |
42
|
|
|
* Audio formats. |
43
|
|
|
* Formats not listed here should be set to 65534, |
44
|
|
|
* the code for WAVE_FORMAT_EXTENSIBLE |
45
|
|
|
* @enum {number} |
46
|
|
|
* @protected |
47
|
|
|
*/ |
48
|
|
|
this.WAV_AUDIO_FORMATS = { |
49
|
|
|
'4': 17, |
50
|
|
|
'8': 1, |
51
|
|
|
'8a': 6, |
52
|
|
|
'8m': 7, |
53
|
|
|
'16': 1, |
54
|
|
|
'24': 1, |
55
|
|
|
'32': 1, |
56
|
|
|
'32f': 3, |
57
|
|
|
'64': 3 |
58
|
|
|
}; |
59
|
|
|
/** |
60
|
|
|
* The data of the 'fmt' chunk. |
61
|
|
|
* @type {!Object<string, *>} |
62
|
|
|
*/ |
63
|
|
|
this.fmt = { |
64
|
|
|
/** @type {string} */ |
65
|
|
|
chunkId: '', |
66
|
|
|
/** @type {number} */ |
67
|
|
|
chunkSize: 0, |
68
|
|
|
/** @type {number} */ |
69
|
|
|
audioFormat: 0, |
70
|
|
|
/** @type {number} */ |
71
|
|
|
numChannels: 0, |
72
|
|
|
/** @type {number} */ |
73
|
|
|
sampleRate: 0, |
74
|
|
|
/** @type {number} */ |
75
|
|
|
byteRate: 0, |
76
|
|
|
/** @type {number} */ |
77
|
|
|
blockAlign: 0, |
78
|
|
|
/** @type {number} */ |
79
|
|
|
bitsPerSample: 0, |
80
|
|
|
/** @type {number} */ |
81
|
|
|
cbSize: 0, |
82
|
|
|
/** @type {number} */ |
83
|
|
|
validBitsPerSample: 0, |
84
|
|
|
/** @type {number} */ |
85
|
|
|
dwChannelMask: 0, |
86
|
|
|
/** |
87
|
|
|
* 4 32-bit values representing a 128-bit ID |
88
|
|
|
* @type {!Array<number>} |
89
|
|
|
*/ |
90
|
|
|
subformat: [] |
91
|
|
|
}; |
92
|
|
|
/** |
93
|
|
|
* The data of the 'fact' chunk. |
94
|
|
|
* @type {!Object<string, *>} |
95
|
|
|
*/ |
96
|
|
|
this.fact = { |
97
|
|
|
/** @type {string} */ |
98
|
|
|
chunkId: '', |
99
|
|
|
/** @type {number} */ |
100
|
|
|
chunkSize: 0, |
101
|
|
|
/** @type {number} */ |
102
|
|
|
dwSampleLength: 0 |
103
|
|
|
}; |
104
|
|
|
/** |
105
|
|
|
* The data of the 'cue ' chunk. |
106
|
|
|
* @type {!Object<string, *>} |
107
|
|
|
*/ |
108
|
|
|
this.cue = { |
109
|
|
|
/** @type {string} */ |
110
|
|
|
chunkId: '', |
111
|
|
|
/** @type {number} */ |
112
|
|
|
chunkSize: 0, |
113
|
|
|
/** @type {number} */ |
114
|
|
|
dwCuePoints: 0, |
115
|
|
|
/** @type {!Array<!Object>} */ |
116
|
|
|
points: [], |
117
|
|
|
}; |
118
|
|
|
/** |
119
|
|
|
* The data of the 'smpl' chunk. |
120
|
|
|
* @type {!Object<string, *>} |
121
|
|
|
*/ |
122
|
|
|
this.smpl = { |
123
|
|
|
/** @type {string} */ |
124
|
|
|
chunkId: '', |
125
|
|
|
/** @type {number} */ |
126
|
|
|
chunkSize: 0, |
127
|
|
|
/** @type {number} */ |
128
|
|
|
dwManufacturer: 0, |
129
|
|
|
/** @type {number} */ |
130
|
|
|
dwProduct: 0, |
131
|
|
|
/** @type {number} */ |
132
|
|
|
dwSamplePeriod: 0, |
133
|
|
|
/** @type {number} */ |
134
|
|
|
dwMIDIUnityNote: 0, |
135
|
|
|
/** @type {number} */ |
136
|
|
|
dwMIDIPitchFraction: 0, |
137
|
|
|
/** @type {number} */ |
138
|
|
|
dwSMPTEFormat: 0, |
139
|
|
|
/** @type {number} */ |
140
|
|
|
dwSMPTEOffset: 0, |
141
|
|
|
/** @type {number} */ |
142
|
|
|
dwNumSampleLoops: 0, |
143
|
|
|
/** @type {number} */ |
144
|
|
|
dwSamplerData: 0, |
145
|
|
|
/** @type {!Array<!Object>} */ |
146
|
|
|
loops: [] |
147
|
|
|
}; |
148
|
|
|
/** |
149
|
|
|
* The data of the 'bext' chunk. |
150
|
|
|
* @type {!Object<string, *>} |
151
|
|
|
*/ |
152
|
|
|
this.bext = { |
153
|
|
|
/** @type {string} */ |
154
|
|
|
chunkId: '', |
155
|
|
|
/** @type {number} */ |
156
|
|
|
chunkSize: 0, |
157
|
|
|
/** @type {string} */ |
158
|
|
|
description: '', //256 |
159
|
|
|
/** @type {string} */ |
160
|
|
|
originator: '', //32 |
161
|
|
|
/** @type {string} */ |
162
|
|
|
originatorReference: '', //32 |
163
|
|
|
/** @type {string} */ |
164
|
|
|
originationDate: '', //10 |
165
|
|
|
/** @type {string} */ |
166
|
|
|
originationTime: '', //8 |
167
|
|
|
/** |
168
|
|
|
* 2 32-bit values, timeReference high and low |
169
|
|
|
* @type {!Array<number>} |
170
|
|
|
*/ |
171
|
|
|
timeReference: [0, 0], |
172
|
|
|
/** @type {number} */ |
173
|
|
|
version: 0, //WORD |
174
|
|
|
/** @type {string} */ |
175
|
|
|
UMID: '', // 64 chars |
176
|
|
|
/** @type {number} */ |
177
|
|
|
loudnessValue: 0, //WORD |
178
|
|
|
/** @type {number} */ |
179
|
|
|
loudnessRange: 0, //WORD |
180
|
|
|
/** @type {number} */ |
181
|
|
|
maxTruePeakLevel: 0, //WORD |
182
|
|
|
/** @type {number} */ |
183
|
|
|
maxMomentaryLoudness: 0, //WORD |
184
|
|
|
/** @type {number} */ |
185
|
|
|
maxShortTermLoudness: 0, //WORD |
186
|
|
|
/** @type {string} */ |
187
|
|
|
reserved: '', //180 |
188
|
|
|
/** @type {string} */ |
189
|
|
|
codingHistory: '' // string, unlimited |
190
|
|
|
}; |
191
|
|
|
/** |
192
|
|
|
* The data of the 'ds64' chunk. |
193
|
|
|
* Used only with RF64 files. |
194
|
|
|
* @type {!Object<string, *>} |
195
|
|
|
*/ |
196
|
|
|
this.ds64 = { |
197
|
|
|
/** @type {string} */ |
198
|
|
|
chunkId: '', |
199
|
|
|
/** @type {number} */ |
200
|
|
|
chunkSize: 0, |
201
|
|
|
/** @type {number} */ |
202
|
|
|
riffSizeHigh: 0, // DWORD |
203
|
|
|
/** @type {number} */ |
204
|
|
|
riffSizeLow: 0, // DWORD |
205
|
|
|
/** @type {number} */ |
206
|
|
|
dataSizeHigh: 0, // DWORD |
207
|
|
|
/** @type {number} */ |
208
|
|
|
dataSizeLow: 0, // DWORD |
209
|
|
|
/** @type {number} */ |
210
|
|
|
originationTime: 0, // DWORD |
211
|
|
|
/** @type {number} */ |
212
|
|
|
sampleCountHigh: 0, // DWORD |
213
|
|
|
/** @type {number} */ |
214
|
|
|
sampleCountLow: 0 // DWORD |
215
|
|
|
/** @type {number} */ |
216
|
|
|
//'tableLength': 0, // DWORD |
217
|
|
|
/** @type {!Array<number>} */ |
218
|
|
|
//'table': [] |
219
|
|
|
}; |
220
|
|
|
/** |
221
|
|
|
* The data of the 'data' chunk. |
222
|
|
|
* @type {!Object<string, *>} |
223
|
|
|
*/ |
224
|
|
|
this.data = { |
225
|
|
|
/** @type {string} */ |
226
|
|
|
chunkId: '', |
227
|
|
|
/** @type {number} */ |
228
|
|
|
chunkSize: 0, |
229
|
|
|
/** @type {!Uint8Array} */ |
230
|
|
|
samples: new Uint8Array(0) |
231
|
|
|
}; |
232
|
|
|
/** |
233
|
|
|
* The data of the 'LIST' chunks. |
234
|
|
|
* Each item in this list look like this: |
235
|
|
|
* { |
236
|
|
|
* chunkId: '', |
237
|
|
|
* chunkSize: 0, |
238
|
|
|
* format: '', |
239
|
|
|
* subChunks: [] |
240
|
|
|
* } |
241
|
|
|
* @type {!Array<!Object>} |
242
|
|
|
*/ |
243
|
|
|
this.LIST = []; |
244
|
|
|
/** |
245
|
|
|
* The data of the 'junk' chunk. |
246
|
|
|
* @type {!Object<string, *>} |
247
|
|
|
*/ |
248
|
|
|
this.junk = { |
249
|
|
|
/** @type {string} */ |
250
|
|
|
chunkId: '', |
251
|
|
|
/** @type {number} */ |
252
|
|
|
chunkSize: 0, |
253
|
|
|
/** @type {!Array<number>} */ |
254
|
|
|
chunkData: [] |
255
|
|
|
}; |
256
|
|
|
/** |
257
|
|
|
* The bit depth code according to the samples. |
258
|
|
|
* @type {string} |
259
|
|
|
*/ |
260
|
|
|
this.bitDepth = '0'; |
261
|
|
|
/** |
262
|
|
|
* @type {!Object} |
263
|
|
|
* @protected |
264
|
|
|
*/ |
265
|
|
|
this.dataType = {}; |
266
|
|
|
} |
267
|
|
|
|
268
|
|
|
/** |
269
|
|
|
* Set up the WaveFileParser object from a byte buffer. |
270
|
|
|
* @param {!Uint8Array} wavBuffer The buffer. |
271
|
|
|
* @param {boolean=} samples True if the samples should be loaded. |
272
|
|
|
* @throws {Error} If container is not RIFF, RIFX or RF64. |
273
|
|
|
* @throws {Error} If format is not WAVE. |
274
|
|
|
* @throws {Error} If no 'fmt ' chunk is found. |
275
|
|
|
* @throws {Error} If no 'data' chunk is found. |
276
|
|
|
*/ |
277
|
|
|
readBuffer(wavBuffer, samples=true) { |
278
|
|
|
this.clearHeader(); |
279
|
|
|
this.head_ = 0; |
280
|
|
|
this.readRIFFChunk(wavBuffer); |
281
|
|
|
if (this.format != 'WAVE') { |
282
|
|
|
throw Error('Could not find the "WAVE" format identifier'); |
283
|
|
|
} |
284
|
|
|
this.setSignature(wavBuffer); |
285
|
|
|
this.readDs64Chunk_(wavBuffer); |
286
|
|
|
this.readFmtChunk_(wavBuffer); |
287
|
|
|
this.readFactChunk_(wavBuffer); |
288
|
|
|
this.readBextChunk_(wavBuffer); |
289
|
|
|
this.readCueChunk_(wavBuffer); |
290
|
|
|
this.readSmplChunk_(wavBuffer); |
291
|
|
|
this.readDataChunk_(wavBuffer, samples); |
292
|
|
|
this.readJunkChunk_(wavBuffer); |
293
|
|
|
this.readLISTChunk_(wavBuffer); |
294
|
|
|
this.bitDepthFromFmt_(); |
295
|
|
|
this.updateDataType(); |
296
|
|
|
} |
297
|
|
|
|
298
|
|
|
/** |
299
|
|
|
* Return a byte buffer representig the WaveFileParser object as a .wav file. |
300
|
|
|
* The return value of this method can be written straight to disk. |
301
|
|
|
* @return {!Uint8Array} A wav file. |
302
|
|
|
* @throws {Error} If bit depth is invalid. |
303
|
|
|
* @throws {Error} If the number of channels is invalid. |
304
|
|
|
* @throws {Error} If the sample rate is invalid. |
305
|
|
|
*/ |
306
|
|
|
writeBuffer() { |
307
|
|
|
this.validateWavHeader(); |
308
|
|
|
return this.writeWavBuffer_(); |
309
|
|
|
} |
310
|
|
|
|
311
|
|
|
/** |
312
|
|
|
* Reset some attributes of the object. |
313
|
|
|
* @protected |
314
|
|
|
*/ |
315
|
|
|
clearHeader() { |
316
|
|
|
this.fmt.cbSize = 0; |
317
|
|
|
this.fmt.validBitsPerSample = 0; |
318
|
|
|
this.fact.chunkId = ''; |
319
|
|
|
this.ds64.chunkId = ''; |
320
|
|
|
} |
321
|
|
|
|
322
|
|
|
/** |
323
|
|
|
* Validate the header of the file. |
324
|
|
|
* @throws {Error} If bit depth is invalid. |
325
|
|
|
* @throws {Error} If the number of channels is invalid. |
326
|
|
|
* @throws {Error} If the sample rate is invalid. |
327
|
|
|
* @protected |
328
|
|
|
*/ |
329
|
|
|
validateWavHeader() { |
330
|
|
|
this.validateBitDepth_(); |
331
|
|
|
this.validateNumChannels_(); |
332
|
|
|
this.validateSampleRate_(); |
333
|
|
|
} |
334
|
|
|
|
335
|
|
|
/** |
336
|
|
|
* Update the type definition used to read and write the samples. |
337
|
|
|
* @protected |
338
|
|
|
*/ |
339
|
|
|
updateDataType() { |
340
|
|
|
this.dataType = { |
341
|
|
|
bits: ((parseInt(this.bitDepth, 10) - 1) | 7) + 1, |
342
|
|
|
fp: this.bitDepth == '32f' || this.bitDepth == '64', |
343
|
|
|
signed: this.bitDepth != '8', |
344
|
|
|
be: this.container == 'RIFX' |
345
|
|
|
}; |
346
|
|
|
if (['4', '8a', '8m'].indexOf(this.bitDepth) > -1 ) { |
347
|
|
|
this.dataType.bits = 8; |
348
|
|
|
this.dataType.signed = false; |
349
|
|
|
} |
350
|
|
|
} |
351
|
|
|
|
352
|
|
|
/** |
353
|
|
|
* Set the string code of the bit depth based on the 'fmt ' chunk. |
354
|
|
|
* @private |
355
|
|
|
*/ |
356
|
|
|
bitDepthFromFmt_() { |
357
|
|
|
if (this.fmt.audioFormat === 3 && this.fmt.bitsPerSample === 32) { |
358
|
|
|
this.bitDepth = '32f'; |
359
|
|
|
} else if (this.fmt.audioFormat === 6) { |
360
|
|
|
this.bitDepth = '8a'; |
361
|
|
|
} else if (this.fmt.audioFormat === 7) { |
362
|
|
|
this.bitDepth = '8m'; |
363
|
|
|
} else { |
364
|
|
|
this.bitDepth = this.fmt.bitsPerSample.toString(); |
365
|
|
|
} |
366
|
|
|
} |
367
|
|
|
|
368
|
|
|
/** |
369
|
|
|
* Return a .wav file byte buffer with the data from the WaveFileParser object. |
370
|
|
|
* The return value of this method can be written straight to disk. |
371
|
|
|
* @return {!Uint8Array} The wav file bytes. |
372
|
|
|
* @private |
373
|
|
|
*/ |
374
|
|
|
writeWavBuffer_() { |
375
|
|
|
this.uInt16_.be = this.container === 'RIFX'; |
376
|
|
|
this.uInt32_.be = this.uInt16_.be; |
377
|
|
|
/** @type {!Array<!Array<number>>} */ |
378
|
|
|
let fileBody = [ |
379
|
|
|
this.getJunkBytes_(), |
380
|
|
|
this.getDs64Bytes_(), |
381
|
|
|
this.getBextBytes_(), |
382
|
|
|
this.getFmtBytes_(), |
383
|
|
|
this.getFactBytes_(), |
384
|
|
|
packString(this.data.chunkId), |
385
|
|
|
pack(this.data.samples.length, this.uInt32_), |
386
|
|
|
this.data.samples, |
387
|
|
|
this.getCueBytes_(), |
388
|
|
|
this.getSmplBytes_(), |
389
|
|
|
this.getLISTBytes_() |
390
|
|
|
]; |
391
|
|
|
/** @type {number} */ |
392
|
|
|
let fileBodyLength = 0; |
393
|
|
|
for (let i=0; i<fileBody.length; i++) { |
394
|
|
|
fileBodyLength += fileBody[i].length; |
395
|
|
|
} |
396
|
|
|
/** @type {!Uint8Array} */ |
397
|
|
|
let file = new Uint8Array(fileBodyLength + 12); |
398
|
|
|
/** @type {number} */ |
399
|
|
|
let index = 0; |
400
|
|
|
index = packStringTo(this.container, file, index); |
401
|
|
|
index = packTo(fileBodyLength + 4, this.uInt32_, file, index); |
402
|
|
|
index = packStringTo(this.format, file, index); |
403
|
|
|
for (let i=0; i<fileBody.length; i++) { |
404
|
|
|
file.set(fileBody[i], index); |
405
|
|
|
index += fileBody[i].length; |
406
|
|
|
} |
407
|
|
|
return file; |
408
|
|
|
} |
409
|
|
|
|
410
|
|
|
/** |
411
|
|
|
* Return the bytes of the 'bext' chunk. |
412
|
|
|
* @private |
413
|
|
|
*/ |
414
|
|
|
getBextBytes_() { |
415
|
|
|
/** @type {!Array<number>} */ |
416
|
|
|
let bytes = []; |
417
|
|
|
this.enforceBext_(); |
418
|
|
|
if (this.bext.chunkId) { |
419
|
|
|
this.bext.chunkSize = 602 + this.bext.codingHistory.length; |
420
|
|
|
bytes = bytes.concat( |
421
|
|
|
packString(this.bext.chunkId), |
422
|
|
|
pack(602 + this.bext.codingHistory.length, this.uInt32_), |
423
|
|
|
writeString(this.bext.description, 256), |
424
|
|
|
writeString(this.bext.originator, 32), |
425
|
|
|
writeString(this.bext.originatorReference, 32), |
426
|
|
|
writeString(this.bext.originationDate, 10), |
427
|
|
|
writeString(this.bext.originationTime, 8), |
428
|
|
|
pack(this.bext.timeReference[0], this.uInt32_), |
429
|
|
|
pack(this.bext.timeReference[1], this.uInt32_), |
430
|
|
|
pack(this.bext.version, this.uInt16_), |
431
|
|
|
writeString(this.bext.UMID, 64), |
432
|
|
|
pack(this.bext.loudnessValue, this.uInt16_), |
433
|
|
|
pack(this.bext.loudnessRange, this.uInt16_), |
434
|
|
|
pack(this.bext.maxTruePeakLevel, this.uInt16_), |
435
|
|
|
pack(this.bext.maxMomentaryLoudness, this.uInt16_), |
436
|
|
|
pack(this.bext.maxShortTermLoudness, this.uInt16_), |
437
|
|
|
writeString(this.bext.reserved, 180), |
438
|
|
|
writeString( |
439
|
|
|
this.bext.codingHistory, this.bext.codingHistory.length)); |
440
|
|
|
} |
441
|
|
|
return bytes; |
442
|
|
|
} |
443
|
|
|
|
444
|
|
|
/** |
445
|
|
|
* Make sure a 'bext' chunk is created if BWF data was created in a file. |
446
|
|
|
* @private |
447
|
|
|
*/ |
448
|
|
|
enforceBext_() { |
449
|
|
|
for (let prop in this.bext) { |
450
|
|
|
if (this.bext.hasOwnProperty(prop)) { |
451
|
|
|
if (this.bext[prop] && prop != 'timeReference') { |
452
|
|
|
this.bext.chunkId = 'bext'; |
453
|
|
|
break; |
454
|
|
|
} |
455
|
|
|
} |
456
|
|
|
} |
457
|
|
|
if (this.bext.timeReference[0] || this.bext.timeReference[1]) { |
458
|
|
|
this.bext.chunkId = 'bext'; |
459
|
|
|
} |
460
|
|
|
} |
461
|
|
|
|
462
|
|
|
/** |
463
|
|
|
* Return the bytes of the 'ds64' chunk. |
464
|
|
|
* @return {!Array<number>} The 'ds64' chunk bytes. |
465
|
|
|
* @private |
466
|
|
|
*/ |
467
|
|
|
getDs64Bytes_() { |
468
|
|
|
/** @type {!Array<number>} */ |
469
|
|
|
let bytes = []; |
470
|
|
|
if (this.ds64.chunkId) { |
471
|
|
|
bytes = bytes.concat( |
472
|
|
|
packString(this.ds64.chunkId), |
473
|
|
|
pack(this.ds64.chunkSize, this.uInt32_), |
474
|
|
|
pack(this.ds64.riffSizeHigh, this.uInt32_), |
475
|
|
|
pack(this.ds64.riffSizeLow, this.uInt32_), |
476
|
|
|
pack(this.ds64.dataSizeHigh, this.uInt32_), |
477
|
|
|
pack(this.ds64.dataSizeLow, this.uInt32_), |
478
|
|
|
pack(this.ds64.originationTime, this.uInt32_), |
479
|
|
|
pack(this.ds64.sampleCountHigh, this.uInt32_), |
480
|
|
|
pack(this.ds64.sampleCountLow, this.uInt32_)); |
481
|
|
|
} |
482
|
|
|
//if (this.ds64.tableLength) { |
483
|
|
|
// ds64Bytes = ds64Bytes.concat( |
484
|
|
|
// pack(this.ds64.tableLength, this.uInt32_), |
485
|
|
|
// this.ds64.table); |
486
|
|
|
//} |
487
|
|
|
return bytes; |
488
|
|
|
} |
489
|
|
|
|
490
|
|
|
/** |
491
|
|
|
* Return the bytes of the 'cue ' chunk. |
492
|
|
|
* @return {!Array<number>} The 'cue ' chunk bytes. |
493
|
|
|
* @private |
494
|
|
|
*/ |
495
|
|
|
getCueBytes_() { |
496
|
|
|
/** @type {!Array<number>} */ |
497
|
|
|
let bytes = []; |
498
|
|
|
if (this.cue.chunkId) { |
499
|
|
|
/** @type {!Array<number>} */ |
500
|
|
|
let cuePointsBytes = this.getCuePointsBytes_(); |
501
|
|
|
bytes = bytes.concat( |
502
|
|
|
packString(this.cue.chunkId), |
503
|
|
|
pack(cuePointsBytes.length + 4, this.uInt32_), |
504
|
|
|
pack(this.cue.dwCuePoints, this.uInt32_), |
505
|
|
|
cuePointsBytes); |
506
|
|
|
} |
507
|
|
|
return bytes; |
508
|
|
|
} |
509
|
|
|
|
510
|
|
|
/** |
511
|
|
|
* Return the bytes of the 'cue ' points. |
512
|
|
|
* @return {!Array<number>} The 'cue ' points as an array of bytes. |
513
|
|
|
* @private |
514
|
|
|
*/ |
515
|
|
|
getCuePointsBytes_() { |
516
|
|
|
/** @type {!Array<number>} */ |
517
|
|
|
let points = []; |
518
|
|
|
for (let i=0; i<this.cue.dwCuePoints; i++) { |
519
|
|
|
points = points.concat( |
520
|
|
|
pack(this.cue.points[i].dwName, this.uInt32_), |
521
|
|
|
pack(this.cue.points[i].dwPosition, this.uInt32_), |
522
|
|
|
packString(this.cue.points[i].fccChunk), |
523
|
|
|
pack(this.cue.points[i].dwChunkStart, this.uInt32_), |
524
|
|
|
pack(this.cue.points[i].dwBlockStart, this.uInt32_), |
525
|
|
|
pack(this.cue.points[i].dwSampleOffset, this.uInt32_)); |
526
|
|
|
} |
527
|
|
|
return points; |
528
|
|
|
} |
529
|
|
|
|
530
|
|
|
/** |
531
|
|
|
* Return the bytes of the 'smpl' chunk. |
532
|
|
|
* @return {!Array<number>} The 'smpl' chunk bytes. |
533
|
|
|
* @private |
534
|
|
|
*/ |
535
|
|
|
getSmplBytes_() { |
536
|
|
|
/** @type {!Array<number>} */ |
537
|
|
|
let bytes = []; |
538
|
|
|
if (this.smpl.chunkId) { |
539
|
|
|
/** @type {!Array<number>} */ |
540
|
|
|
let smplLoopsBytes = this.getSmplLoopsBytes_(); |
541
|
|
|
bytes = bytes.concat( |
542
|
|
|
packString(this.smpl.chunkId), |
543
|
|
|
pack(smplLoopsBytes.length + 36, this.uInt32_), |
544
|
|
|
pack(this.smpl.dwManufacturer, this.uInt32_), |
545
|
|
|
pack(this.smpl.dwProduct, this.uInt32_), |
546
|
|
|
pack(this.smpl.dwSamplePeriod, this.uInt32_), |
547
|
|
|
pack(this.smpl.dwMIDIUnityNote, this.uInt32_), |
548
|
|
|
pack(this.smpl.dwMIDIPitchFraction, this.uInt32_), |
549
|
|
|
pack(this.smpl.dwSMPTEFormat, this.uInt32_), |
550
|
|
|
pack(this.smpl.dwSMPTEOffset, this.uInt32_), |
551
|
|
|
pack(this.smpl.dwNumSampleLoops, this.uInt32_), |
552
|
|
|
pack(this.smpl.dwSamplerData, this.uInt32_), |
553
|
|
|
smplLoopsBytes); |
554
|
|
|
} |
555
|
|
|
return bytes; |
556
|
|
|
} |
557
|
|
|
|
558
|
|
|
/** |
559
|
|
|
* Return the bytes of the 'smpl' loops. |
560
|
|
|
* @return {!Array<number>} The 'smpl' loops as an array of bytes. |
561
|
|
|
* @private |
562
|
|
|
*/ |
563
|
|
|
getSmplLoopsBytes_() { |
564
|
|
|
/** @type {!Array<number>} */ |
565
|
|
|
let loops = []; |
566
|
|
|
for (let i=0; i<this.smpl.dwNumSampleLoops; i++) { |
567
|
|
|
loops = loops.concat( |
568
|
|
|
pack(this.smpl.loops[i].dwName, this.uInt32_), |
569
|
|
|
pack(this.smpl.loops[i].dwType, this.uInt32_), |
570
|
|
|
pack(this.smpl.loops[i].dwStart, this.uInt32_), |
571
|
|
|
pack(this.smpl.loops[i].dwEnd, this.uInt32_), |
572
|
|
|
pack(this.smpl.loops[i].dwFraction, this.uInt32_), |
573
|
|
|
pack(this.smpl.loops[i].dwPlayCount, this.uInt32_)); |
574
|
|
|
} |
575
|
|
|
return loops; |
576
|
|
|
} |
577
|
|
|
|
578
|
|
|
/** |
579
|
|
|
* Return the bytes of the 'fact' chunk. |
580
|
|
|
* @return {!Array<number>} The 'fact' chunk bytes. |
581
|
|
|
* @private |
582
|
|
|
*/ |
583
|
|
|
getFactBytes_() { |
584
|
|
|
/** @type {!Array<number>} */ |
585
|
|
|
let bytes = []; |
586
|
|
|
if (this.fact.chunkId) { |
587
|
|
|
bytes = bytes.concat( |
588
|
|
|
packString(this.fact.chunkId), |
589
|
|
|
pack(this.fact.chunkSize, this.uInt32_), |
590
|
|
|
pack(this.fact.dwSampleLength, this.uInt32_)); |
591
|
|
|
} |
592
|
|
|
return bytes; |
593
|
|
|
} |
594
|
|
|
|
595
|
|
|
/** |
596
|
|
|
* Return the bytes of the 'fmt ' chunk. |
597
|
|
|
* @return {!Array<number>} The 'fmt' chunk bytes. |
598
|
|
|
* @throws {Error} if no 'fmt ' chunk is present. |
599
|
|
|
* @private |
600
|
|
|
*/ |
601
|
|
|
getFmtBytes_() { |
602
|
|
|
/** @type {!Array<number>} */ |
603
|
|
|
let fmtBytes = []; |
604
|
|
|
if (this.fmt.chunkId) { |
605
|
|
|
return fmtBytes.concat( |
606
|
|
|
packString(this.fmt.chunkId), |
607
|
|
|
pack(this.fmt.chunkSize, this.uInt32_), |
608
|
|
|
pack(this.fmt.audioFormat, this.uInt16_), |
609
|
|
|
pack(this.fmt.numChannels, this.uInt16_), |
610
|
|
|
pack(this.fmt.sampleRate, this.uInt32_), |
611
|
|
|
pack(this.fmt.byteRate, this.uInt32_), |
612
|
|
|
pack(this.fmt.blockAlign, this.uInt16_), |
613
|
|
|
pack(this.fmt.bitsPerSample, this.uInt16_), |
614
|
|
|
this.getFmtExtensionBytes_()); |
615
|
|
|
} |
616
|
|
|
throw Error('Could not find the "fmt " chunk'); |
617
|
|
|
} |
618
|
|
|
|
619
|
|
|
/** |
620
|
|
|
* Return the bytes of the fmt extension fields. |
621
|
|
|
* @return {!Array<number>} The fmt extension bytes. |
622
|
|
|
* @private |
623
|
|
|
*/ |
624
|
|
|
getFmtExtensionBytes_() { |
625
|
|
|
/** @type {!Array<number>} */ |
626
|
|
|
let extension = []; |
627
|
|
|
if (this.fmt.chunkSize > 16) { |
628
|
|
|
extension = extension.concat( |
629
|
|
|
pack(this.fmt.cbSize, this.uInt16_)); |
630
|
|
|
} |
631
|
|
|
if (this.fmt.chunkSize > 18) { |
632
|
|
|
extension = extension.concat( |
633
|
|
|
pack(this.fmt.validBitsPerSample, this.uInt16_)); |
634
|
|
|
} |
635
|
|
|
if (this.fmt.chunkSize > 20) { |
636
|
|
|
extension = extension.concat( |
637
|
|
|
pack(this.fmt.dwChannelMask, this.uInt32_)); |
638
|
|
|
} |
639
|
|
|
if (this.fmt.chunkSize > 24) { |
640
|
|
|
extension = extension.concat( |
641
|
|
|
pack(this.fmt.subformat[0], this.uInt32_), |
642
|
|
|
pack(this.fmt.subformat[1], this.uInt32_), |
643
|
|
|
pack(this.fmt.subformat[2], this.uInt32_), |
644
|
|
|
pack(this.fmt.subformat[3], this.uInt32_)); |
645
|
|
|
} |
646
|
|
|
return extension; |
647
|
|
|
} |
648
|
|
|
|
649
|
|
|
/** |
650
|
|
|
* Return the bytes of the 'LIST' chunk. |
651
|
|
|
* @return {!Array<number>} The 'LIST' chunk bytes. |
652
|
|
|
* @private |
653
|
|
|
*/ |
654
|
|
|
getLISTBytes_() { |
655
|
|
|
/** @type {!Array<number>} */ |
656
|
|
|
let bytes = []; |
657
|
|
|
for (let i=0; i<this.LIST.length; i++) { |
658
|
|
|
/** @type {!Array<number>} */ |
659
|
|
|
let subChunksBytes = this.getLISTSubChunksBytes_( |
660
|
|
|
this.LIST[i].subChunks, this.LIST[i].format); |
661
|
|
|
bytes = bytes.concat( |
662
|
|
|
packString(this.LIST[i].chunkId), |
663
|
|
|
pack(subChunksBytes.length + 4, this.uInt32_), |
664
|
|
|
packString(this.LIST[i].format), |
665
|
|
|
subChunksBytes); |
666
|
|
|
} |
667
|
|
|
return bytes; |
668
|
|
|
} |
669
|
|
|
|
670
|
|
|
/** |
671
|
|
|
* Return the bytes of the sub chunks of a 'LIST' chunk. |
672
|
|
|
* @param {!Array<!Object>} subChunks The 'LIST' sub chunks. |
673
|
|
|
* @param {string} format The format of the 'LIST' chunk. |
674
|
|
|
* Currently supported values are 'adtl' or 'INFO'. |
675
|
|
|
* @return {!Array<number>} The sub chunk bytes. |
676
|
|
|
* @private |
677
|
|
|
*/ |
678
|
|
|
getLISTSubChunksBytes_(subChunks, format) { |
679
|
|
|
/** @type {!Array<number>} */ |
680
|
|
|
let bytes = []; |
681
|
|
|
for (let i=0; i<subChunks.length; i++) { |
682
|
|
|
if (format == 'INFO') { |
683
|
|
|
bytes = bytes.concat( |
684
|
|
|
packString(subChunks[i].chunkId), |
685
|
|
|
pack(subChunks[i].value.length + 1, this.uInt32_), |
686
|
|
|
writeString( |
687
|
|
|
subChunks[i].value, subChunks[i].value.length)); |
688
|
|
|
bytes.push(0); |
689
|
|
|
} else if (format == 'adtl') { |
690
|
|
|
if (['labl', 'note'].indexOf(subChunks[i].chunkId) > -1) { |
691
|
|
|
bytes = bytes.concat( |
692
|
|
|
packString(subChunks[i].chunkId), |
693
|
|
|
pack( |
694
|
|
|
subChunks[i].value.length + 4 + 1, this.uInt32_), |
695
|
|
|
pack(subChunks[i].dwName, this.uInt32_), |
696
|
|
|
writeString( |
697
|
|
|
subChunks[i].value, |
698
|
|
|
subChunks[i].value.length)); |
699
|
|
|
bytes.push(0); |
700
|
|
|
} else if (subChunks[i].chunkId == 'ltxt') { |
701
|
|
|
bytes = bytes.concat( |
702
|
|
|
this.getLtxtChunkBytes_(subChunks[i])); |
703
|
|
|
} |
704
|
|
|
} |
705
|
|
|
if (bytes.length % 2) { |
706
|
|
|
bytes.push(0); |
707
|
|
|
} |
708
|
|
|
} |
709
|
|
|
return bytes; |
710
|
|
|
} |
711
|
|
|
|
712
|
|
|
/** |
713
|
|
|
* Return the bytes of a 'ltxt' chunk. |
714
|
|
|
* @param {!Object} ltxt the 'ltxt' chunk. |
715
|
|
|
* @private |
716
|
|
|
*/ |
717
|
|
|
getLtxtChunkBytes_(ltxt) { |
718
|
|
|
return [].concat( |
719
|
|
|
packString(ltxt.chunkId), |
720
|
|
|
pack(ltxt.value.length + 20, this.uInt32_), |
721
|
|
|
pack(ltxt.dwName, this.uInt32_), |
722
|
|
|
pack(ltxt.dwSampleLength, this.uInt32_), |
723
|
|
|
pack(ltxt.dwPurposeID, this.uInt32_), |
724
|
|
|
pack(ltxt.dwCountry, this.uInt16_), |
725
|
|
|
pack(ltxt.dwLanguage, this.uInt16_), |
726
|
|
|
pack(ltxt.dwDialect, this.uInt16_), |
727
|
|
|
pack(ltxt.dwCodePage, this.uInt16_), |
728
|
|
|
writeString(ltxt.value, ltxt.value.length)); |
729
|
|
|
} |
730
|
|
|
|
731
|
|
|
/** |
732
|
|
|
* Return the bytes of the 'junk' chunk. |
733
|
|
|
* @private |
734
|
|
|
*/ |
735
|
|
|
getJunkBytes_() { |
736
|
|
|
/** @type {!Array<number>} */ |
737
|
|
|
let bytes = []; |
738
|
|
|
if (this.junk.chunkId) { |
739
|
|
|
return bytes.concat( |
740
|
|
|
packString(this.junk.chunkId), |
741
|
|
|
pack(this.junk.chunkData.length, this.uInt32_), |
742
|
|
|
this.junk.chunkData); |
743
|
|
|
} |
744
|
|
|
return bytes; |
745
|
|
|
} |
746
|
|
|
|
747
|
|
|
/** |
748
|
|
|
* Read the 'fmt ' chunk of a wave file. |
749
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
750
|
|
|
* @throws {Error} If no 'fmt ' chunk is found. |
751
|
|
|
* @private |
752
|
|
|
*/ |
753
|
|
|
readFmtChunk_(buffer) { |
754
|
|
|
/** @type {?Object} */ |
755
|
|
|
let chunk = this.findChunk('fmt '); |
756
|
|
|
if (chunk) { |
757
|
|
|
this.head_ = chunk.chunkData.start; |
758
|
|
|
this.fmt.chunkId = chunk.chunkId; |
759
|
|
|
this.fmt.chunkSize = chunk.chunkSize; |
760
|
|
|
this.fmt.audioFormat = this.readNumber(buffer, this.uInt16_); |
761
|
|
|
this.fmt.numChannels = this.readNumber(buffer, this.uInt16_); |
762
|
|
|
this.fmt.sampleRate = this.readNumber(buffer, this.uInt32_); |
763
|
|
|
this.fmt.byteRate = this.readNumber(buffer, this.uInt32_); |
764
|
|
|
this.fmt.blockAlign = this.readNumber(buffer, this.uInt16_); |
765
|
|
|
this.fmt.bitsPerSample = this.readNumber(buffer, this.uInt16_); |
766
|
|
|
this.readFmtExtension_(buffer); |
767
|
|
|
} else { |
768
|
|
|
throw Error('Could not find the "fmt " chunk'); |
769
|
|
|
} |
770
|
|
|
} |
771
|
|
|
|
772
|
|
|
/** |
773
|
|
|
* Read the 'fmt ' chunk extension. |
774
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
775
|
|
|
* @private |
776
|
|
|
*/ |
777
|
|
|
readFmtExtension_(buffer) { |
778
|
|
|
if (this.fmt.chunkSize > 16) { |
779
|
|
|
this.fmt.cbSize = this.readNumber(buffer, this.uInt16_); |
780
|
|
|
if (this.fmt.chunkSize > 18) { |
781
|
|
|
this.fmt.validBitsPerSample = this.readNumber(buffer, this.uInt16_); |
782
|
|
|
if (this.fmt.chunkSize > 20) { |
783
|
|
|
this.fmt.dwChannelMask = this.readNumber(buffer, this.uInt32_); |
784
|
|
|
this.fmt.subformat = [ |
785
|
|
|
this.readNumber(buffer, this.uInt32_), |
786
|
|
|
this.readNumber(buffer, this.uInt32_), |
787
|
|
|
this.readNumber(buffer, this.uInt32_), |
788
|
|
|
this.readNumber(buffer, this.uInt32_)]; |
789
|
|
|
} |
790
|
|
|
} |
791
|
|
|
} |
792
|
|
|
} |
793
|
|
|
|
794
|
|
|
/** |
795
|
|
|
* Read the 'fact' chunk of a wav file. |
796
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
797
|
|
|
* @private |
798
|
|
|
*/ |
799
|
|
|
readFactChunk_(buffer) { |
800
|
|
|
/** @type {?Object} */ |
801
|
|
|
let chunk = this.findChunk('fact'); |
802
|
|
|
if (chunk) { |
803
|
|
|
this.head_ = chunk.chunkData.start; |
804
|
|
|
this.fact.chunkId = chunk.chunkId; |
805
|
|
|
this.fact.chunkSize = chunk.chunkSize; |
806
|
|
|
this.fact.dwSampleLength = this.readNumber(buffer, this.uInt32_); |
807
|
|
|
} |
808
|
|
|
} |
809
|
|
|
|
810
|
|
|
/** |
811
|
|
|
* Read the 'cue ' chunk of a wave file. |
812
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
813
|
|
|
* @private |
814
|
|
|
*/ |
815
|
|
|
readCueChunk_(buffer) { |
816
|
|
|
/** @type {?Object} */ |
817
|
|
|
let chunk = this.findChunk('cue '); |
818
|
|
|
if (chunk) { |
819
|
|
|
this.head_ = chunk.chunkData.start; |
820
|
|
|
this.cue.chunkId = chunk.chunkId; |
821
|
|
|
this.cue.chunkSize = chunk.chunkSize; |
822
|
|
|
this.cue.dwCuePoints = this.readNumber(buffer, this.uInt32_); |
823
|
|
|
for (let i = 0; i < this.cue.dwCuePoints; i++) { |
824
|
|
|
this.cue.points.push({ |
825
|
|
|
dwName: this.readNumber(buffer, this.uInt32_), |
826
|
|
|
dwPosition: this.readNumber(buffer, this.uInt32_), |
827
|
|
|
fccChunk: this.readString(buffer, 4), |
828
|
|
|
dwChunkStart: this.readNumber(buffer, this.uInt32_), |
829
|
|
|
dwBlockStart: this.readNumber(buffer, this.uInt32_), |
830
|
|
|
dwSampleOffset: this.readNumber(buffer, this.uInt32_), |
831
|
|
|
}); |
832
|
|
|
} |
833
|
|
|
} |
834
|
|
|
} |
835
|
|
|
|
836
|
|
|
/** |
837
|
|
|
* Read the 'smpl' chunk of a wave file. |
838
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
839
|
|
|
* @private |
840
|
|
|
*/ |
841
|
|
|
readSmplChunk_(buffer) { |
842
|
|
|
/** @type {?Object} */ |
843
|
|
|
let chunk = this.findChunk('smpl'); |
844
|
|
|
if (chunk) { |
845
|
|
|
this.head_ = chunk.chunkData.start; |
846
|
|
|
this.smpl.chunkId = chunk.chunkId; |
847
|
|
|
this.smpl.chunkSize = chunk.chunkSize; |
848
|
|
|
this.smpl.dwManufacturer = this.readNumber(buffer, this.uInt32_); |
849
|
|
|
this.smpl.dwProduct = this.readNumber(buffer, this.uInt32_); |
850
|
|
|
this.smpl.dwSamplePeriod = this.readNumber(buffer, this.uInt32_); |
851
|
|
|
this.smpl.dwMIDIUnityNote = this.readNumber(buffer, this.uInt32_); |
852
|
|
|
this.smpl.dwMIDIPitchFraction = this.readNumber(buffer, this.uInt32_); |
853
|
|
|
this.smpl.dwSMPTEFormat = this.readNumber(buffer, this.uInt32_); |
854
|
|
|
this.smpl.dwSMPTEOffset = this.readNumber(buffer, this.uInt32_); |
855
|
|
|
this.smpl.dwNumSampleLoops = this.readNumber(buffer, this.uInt32_); |
856
|
|
|
this.smpl.dwSamplerData = this.readNumber(buffer, this.uInt32_); |
857
|
|
|
for (let i = 0; i < this.smpl.dwNumSampleLoops; i++) { |
858
|
|
|
this.smpl.loops.push({ |
859
|
|
|
dwName: this.readNumber(buffer, this.uInt32_), |
860
|
|
|
dwType: this.readNumber(buffer, this.uInt32_), |
861
|
|
|
dwStart: this.readNumber(buffer, this.uInt32_), |
862
|
|
|
dwEnd: this.readNumber(buffer, this.uInt32_), |
863
|
|
|
dwFraction: this.readNumber(buffer, this.uInt32_), |
864
|
|
|
dwPlayCount: this.readNumber(buffer, this.uInt32_), |
865
|
|
|
}); |
866
|
|
|
} |
867
|
|
|
} |
868
|
|
|
} |
869
|
|
|
|
870
|
|
|
/** |
871
|
|
|
* Read the 'data' chunk of a wave file. |
872
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
873
|
|
|
* @param {boolean} samples True if the samples should be loaded. |
874
|
|
|
* @throws {Error} If no 'data' chunk is found. |
875
|
|
|
* @private |
876
|
|
|
*/ |
877
|
|
|
readDataChunk_(buffer, samples) { |
878
|
|
|
/** @type {?Object} */ |
879
|
|
|
let chunk = this.findChunk('data'); |
880
|
|
|
if (chunk) { |
881
|
|
|
this.data.chunkId = 'data'; |
882
|
|
|
this.data.chunkSize = chunk.chunkSize; |
883
|
|
|
if (samples) { |
884
|
|
|
this.data.samples = buffer.slice( |
885
|
|
|
chunk.chunkData.start, |
886
|
|
|
chunk.chunkData.end); |
887
|
|
|
} |
888
|
|
|
} else { |
889
|
|
|
throw Error('Could not find the "data" chunk'); |
890
|
|
|
} |
891
|
|
|
} |
892
|
|
|
|
893
|
|
|
/** |
894
|
|
|
* Read the 'bext' chunk of a wav file. |
895
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
896
|
|
|
* @private |
897
|
|
|
*/ |
898
|
|
|
readBextChunk_(buffer) { |
899
|
|
|
/** @type {?Object} */ |
900
|
|
|
let chunk = this.findChunk('bext'); |
901
|
|
|
if (chunk) { |
902
|
|
|
this.head_ = chunk.chunkData.start; |
903
|
|
|
this.bext.chunkId = chunk.chunkId; |
904
|
|
|
this.bext.chunkSize = chunk.chunkSize; |
905
|
|
|
this.bext.description = this.readString(buffer, 256); |
906
|
|
|
this.bext.originator = this.readString(buffer, 32); |
907
|
|
|
this.bext.originatorReference = this.readString(buffer, 32); |
908
|
|
|
this.bext.originationDate = this.readString(buffer, 10); |
909
|
|
|
this.bext.originationTime = this.readString(buffer, 8); |
910
|
|
|
this.bext.timeReference = [ |
911
|
|
|
this.readNumber(buffer, this.uInt32_), |
912
|
|
|
this.readNumber(buffer, this.uInt32_)]; |
913
|
|
|
this.bext.version = this.readNumber(buffer, this.uInt16_); |
914
|
|
|
this.bext.UMID = this.readString(buffer, 64); |
915
|
|
|
this.bext.loudnessValue = this.readNumber(buffer, this.uInt16_); |
916
|
|
|
this.bext.loudnessRange = this.readNumber(buffer, this.uInt16_); |
917
|
|
|
this.bext.maxTruePeakLevel = this.readNumber(buffer, this.uInt16_); |
918
|
|
|
this.bext.maxMomentaryLoudness = this.readNumber(buffer, this.uInt16_); |
919
|
|
|
this.bext.maxShortTermLoudness = this.readNumber(buffer, this.uInt16_); |
920
|
|
|
this.bext.reserved = this.readString(buffer, 180); |
921
|
|
|
this.bext.codingHistory = this.readString( |
922
|
|
|
buffer, this.bext.chunkSize - 602); |
923
|
|
|
} |
924
|
|
|
} |
925
|
|
|
|
926
|
|
|
/** |
927
|
|
|
* Read the 'ds64' chunk of a wave file. |
928
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
929
|
|
|
* @throws {Error} If no 'ds64' chunk is found and the file is RF64. |
930
|
|
|
* @private |
931
|
|
|
*/ |
932
|
|
|
readDs64Chunk_(buffer) { |
933
|
|
|
/** @type {?Object} */ |
934
|
|
|
let chunk = this.findChunk('ds64'); |
935
|
|
|
if (chunk) { |
936
|
|
|
this.head_ = chunk.chunkData.start; |
937
|
|
|
this.ds64.chunkId = chunk.chunkId; |
938
|
|
|
this.ds64.chunkSize = chunk.chunkSize; |
939
|
|
|
this.ds64.riffSizeHigh = this.readNumber(buffer, this.uInt32_); |
940
|
|
|
this.ds64.riffSizeLow = this.readNumber(buffer, this.uInt32_); |
941
|
|
|
this.ds64.dataSizeHigh = this.readNumber(buffer, this.uInt32_); |
942
|
|
|
this.ds64.dataSizeLow = this.readNumber(buffer, this.uInt32_); |
943
|
|
|
this.ds64.originationTime = this.readNumber(buffer, this.uInt32_); |
944
|
|
|
this.ds64.sampleCountHigh = this.readNumber(buffer, this.uInt32_); |
945
|
|
|
this.ds64.sampleCountLow = this.readNumber(buffer, this.uInt32_); |
946
|
|
|
//if (wav.ds64.chunkSize > 28) { |
947
|
|
|
// wav.ds64.tableLength = unpack( |
948
|
|
|
// chunkData.slice(28, 32), uInt32_); |
949
|
|
|
// wav.ds64.table = chunkData.slice( |
950
|
|
|
// 32, 32 + wav.ds64.tableLength); |
951
|
|
|
//} |
952
|
|
|
} else { |
953
|
|
|
if (this.container == 'RF64') { |
954
|
|
|
throw Error('Could not find the "ds64" chunk'); |
955
|
|
|
} |
956
|
|
|
} |
957
|
|
|
} |
958
|
|
|
|
959
|
|
|
/** |
960
|
|
|
* Read the 'LIST' chunks of a wave file. |
961
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
962
|
|
|
* @private |
963
|
|
|
*/ |
964
|
|
|
readLISTChunk_(buffer) { |
965
|
|
|
/** @type {?Object} */ |
966
|
|
|
let listChunks = this.findChunk('LIST', true); |
967
|
|
|
if (listChunks !== null) { |
968
|
|
|
for (let j=0; j < listChunks.length; j++) { |
969
|
|
|
/** @type {!Object} */ |
970
|
|
|
let subChunk = listChunks[j]; |
971
|
|
|
this.LIST.push({ |
972
|
|
|
chunkId: subChunk.chunkId, |
973
|
|
|
chunkSize: subChunk.chunkSize, |
974
|
|
|
format: subChunk.format, |
975
|
|
|
subChunks: []}); |
976
|
|
|
for (let x=0; x<subChunk.subChunks.length; x++) { |
977
|
|
|
this.readLISTSubChunks_(subChunk.subChunks[x], |
978
|
|
|
subChunk.format, buffer); |
979
|
|
|
} |
980
|
|
|
} |
981
|
|
|
} |
982
|
|
|
} |
983
|
|
|
|
984
|
|
|
/** |
985
|
|
|
* Read the sub chunks of a 'LIST' chunk. |
986
|
|
|
* @param {!Object} subChunk The 'LIST' subchunks. |
987
|
|
|
* @param {string} format The 'LIST' format, 'adtl' or 'INFO'. |
988
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
989
|
|
|
* @private |
990
|
|
|
*/ |
991
|
|
|
readLISTSubChunks_(subChunk, format, buffer) { |
992
|
|
|
if (format == 'adtl') { |
993
|
|
|
if (['labl', 'note','ltxt'].indexOf(subChunk.chunkId) > -1) { |
994
|
|
|
this.head_ = subChunk.chunkData.start; |
995
|
|
|
/** @type {!Object<string, string|number>} */ |
996
|
|
|
let item = { |
997
|
|
|
chunkId: subChunk.chunkId, |
998
|
|
|
chunkSize: subChunk.chunkSize, |
999
|
|
|
dwName: this.readNumber(buffer, this.uInt32_) |
1000
|
|
|
}; |
1001
|
|
|
if (subChunk.chunkId == 'ltxt') { |
1002
|
|
|
item.dwSampleLength = this.readNumber(buffer, this.uInt32_); |
1003
|
|
|
item.dwPurposeID = this.readNumber(buffer, this.uInt32_); |
1004
|
|
|
item.dwCountry = this.readNumber(buffer, this.uInt16_); |
1005
|
|
|
item.dwLanguage = this.readNumber(buffer, this.uInt16_); |
1006
|
|
|
item.dwDialect = this.readNumber(buffer, this.uInt16_); |
1007
|
|
|
item.dwCodePage = this.readNumber(buffer, this.uInt16_); |
1008
|
|
|
} |
1009
|
|
|
item.value = this.readZSTR(buffer, this.head_); |
1010
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push(item); |
1011
|
|
|
} |
1012
|
|
|
// RIFF INFO tags like ICRD, ISFT, ICMT |
1013
|
|
|
} else if(format == 'INFO') { |
1014
|
|
|
this.head_ = subChunk.chunkData.start; |
1015
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push({ |
1016
|
|
|
chunkId: subChunk.chunkId, |
1017
|
|
|
chunkSize: subChunk.chunkSize, |
1018
|
|
|
value: this.readZSTR(buffer, this.head_) |
1019
|
|
|
}); |
1020
|
|
|
} |
1021
|
|
|
} |
1022
|
|
|
|
1023
|
|
|
/** |
1024
|
|
|
* Read the 'junk' chunk of a wave file. |
1025
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
1026
|
|
|
* @private |
1027
|
|
|
*/ |
1028
|
|
|
readJunkChunk_(buffer) { |
1029
|
|
|
/** @type {?Object} */ |
1030
|
|
|
let chunk = this.findChunk('junk'); |
1031
|
|
|
if (chunk) { |
1032
|
|
|
this.junk = { |
1033
|
|
|
chunkId: chunk.chunkId, |
1034
|
|
|
chunkSize: chunk.chunkSize, |
1035
|
|
|
chunkData: [].slice.call(buffer.slice( |
1036
|
|
|
chunk.chunkData.start, |
1037
|
|
|
chunk.chunkData.end)) |
1038
|
|
|
}; |
1039
|
|
|
} |
1040
|
|
|
} |
1041
|
|
|
|
1042
|
|
|
/** |
1043
|
|
|
* Validate the bit depth. |
1044
|
|
|
* @return {boolean} True is the bit depth is valid. |
1045
|
|
|
* @throws {Error} If bit depth is invalid. |
1046
|
|
|
* @private |
1047
|
|
|
*/ |
1048
|
|
|
validateBitDepth_() { |
1049
|
|
|
if (!this.WAV_AUDIO_FORMATS[this.bitDepth]) { |
1050
|
|
|
if (parseInt(this.bitDepth, 10) > 8 && |
1051
|
|
|
parseInt(this.bitDepth, 10) < 54) { |
1052
|
|
|
return true; |
1053
|
|
|
} |
1054
|
|
|
throw new Error('Invalid bit depth.'); |
1055
|
|
|
} |
1056
|
|
|
return true; |
1057
|
|
|
} |
1058
|
|
|
|
1059
|
|
|
/** |
1060
|
|
|
* Validate the number of channels. |
1061
|
|
|
* @return {boolean} True is the number of channels is valid. |
1062
|
|
|
* @throws {Error} If the number of channels is invalid. |
1063
|
|
|
* @private |
1064
|
|
|
*/ |
1065
|
|
|
validateNumChannels_() { |
1066
|
|
|
/** @type {number} */ |
1067
|
|
|
let blockAlign = this.fmt.numChannels * this.fmt.bitsPerSample / 8; |
1068
|
|
|
if (this.fmt.numChannels < 1 || blockAlign > 65535) { |
1069
|
|
|
throw new Error('Invalid number of channels.'); |
1070
|
|
|
} |
1071
|
|
|
return true; |
1072
|
|
|
} |
1073
|
|
|
|
1074
|
|
|
/** |
1075
|
|
|
* Validate the sample rate value. |
1076
|
|
|
* @return {boolean} True is the sample rate is valid. |
1077
|
|
|
* @throws {Error} If the sample rate is invalid. |
1078
|
|
|
* @private |
1079
|
|
|
*/ |
1080
|
|
|
validateSampleRate_() { |
1081
|
|
|
/** @type {number} */ |
1082
|
|
|
let byteRate = this.fmt.numChannels * |
1083
|
|
|
(this.fmt.bitsPerSample / 8) * this.fmt.sampleRate; |
1084
|
|
|
if (this.fmt.sampleRate < 1 || byteRate > 4294967295) { |
1085
|
|
|
throw new Error('Invalid sample rate.'); |
1086
|
|
|
} |
1087
|
|
|
return true; |
1088
|
|
|
} |
1089
|
|
|
} |
1090
|
|
|
|