|
1
|
|
|
/* |
|
2
|
|
|
* Copyright (c) 2017-2018 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 A class to read and write wav data. |
|
27
|
|
|
* @see https://github.com/rochars/wavefile |
|
28
|
|
|
*/ |
|
29
|
|
|
|
|
30
|
|
|
import riffChunks from '../vendor/riff-chunks.js'; |
|
31
|
|
|
import {pack, unpackFrom, unpackString, |
|
32
|
|
|
packStringTo, packTo, packString,} from '../vendor/byte-data.js'; |
|
33
|
|
|
|
|
34
|
|
|
// @type {WavStruct} |
|
35
|
|
|
import WavStruct from './wavstruct.js'; |
|
36
|
|
|
|
|
37
|
|
|
/** |
|
38
|
|
|
* A class to read and write wav data. |
|
39
|
|
|
* @extends WavStruct |
|
40
|
|
|
*/ |
|
41
|
|
|
export default class WavIO extends WavStruct { |
|
42
|
|
|
|
|
43
|
|
|
constructor() { |
|
44
|
|
|
super(); |
|
45
|
|
|
/** |
|
46
|
|
|
* @type {!Object} |
|
47
|
|
|
* @private |
|
48
|
|
|
*/ |
|
49
|
|
|
this.uInt16_ = {bits: 16, be: false}; |
|
50
|
|
|
/** |
|
51
|
|
|
* @type {!Object} |
|
52
|
|
|
* @private |
|
53
|
|
|
*/ |
|
54
|
|
|
this.uInt32_ = {bits: 32, be: false}; |
|
55
|
|
|
/** |
|
56
|
|
|
* The bit depth code according to the samples. |
|
57
|
|
|
* @type {string} |
|
58
|
|
|
*/ |
|
59
|
|
|
this.bitDepth = '0'; |
|
60
|
|
|
/** |
|
61
|
|
|
* Audio formats. |
|
62
|
|
|
* Formats not listed here will be set to 65534 |
|
63
|
|
|
* and treated as WAVE_FORMAT_EXTENSIBLE |
|
64
|
|
|
* @enum {number} |
|
65
|
|
|
* @private |
|
66
|
|
|
*/ |
|
67
|
|
|
this.audioFormats_ = { |
|
68
|
|
|
'4': 17, |
|
69
|
|
|
'8': 1, |
|
70
|
|
|
'8a': 6, |
|
71
|
|
|
'8m': 7, |
|
72
|
|
|
'16': 1, |
|
73
|
|
|
'24': 1, |
|
74
|
|
|
'32': 1, |
|
75
|
|
|
'32f': 3, |
|
76
|
|
|
'64': 3 |
|
77
|
|
|
}; |
|
78
|
|
|
/** |
|
79
|
|
|
* @type {number} |
|
80
|
|
|
* @private |
|
81
|
|
|
*/ |
|
82
|
|
|
this.head_ = 0; |
|
83
|
|
|
/** |
|
84
|
|
|
* @type {!Object} |
|
85
|
|
|
* @private |
|
86
|
|
|
*/ |
|
87
|
|
|
this.dataType = {}; |
|
88
|
|
|
} |
|
89
|
|
|
|
|
90
|
|
|
/** |
|
91
|
|
|
* Write a variable size string as bytes. If the string is smaller |
|
92
|
|
|
* than the max size the output array is filled with 0s. |
|
93
|
|
|
* @param {string} str The string to be written as bytes. |
|
94
|
|
|
* @param {number} maxSize the max size of the string. |
|
95
|
|
|
* @return {!Array<number>} The bytes. |
|
96
|
|
|
* @private |
|
97
|
|
|
*/ |
|
98
|
|
|
writeString_(str, maxSize, push=true) { |
|
99
|
|
|
/** @type {!Array<number>} */ |
|
100
|
|
|
let bytes = packString(str); |
|
101
|
|
|
if (push) { |
|
102
|
|
|
for (let i=bytes.length; i<maxSize; i++) { |
|
103
|
|
|
bytes.push(0); |
|
104
|
|
|
} |
|
105
|
|
|
} |
|
106
|
|
|
return bytes; |
|
107
|
|
|
} |
|
108
|
|
|
|
|
109
|
|
|
/** |
|
110
|
|
|
* Return the bytes of the 'bext' chunk. |
|
111
|
|
|
* @return {!Array<number>} The 'bext' chunk bytes. |
|
112
|
|
|
* @private |
|
113
|
|
|
*/ |
|
114
|
|
|
getBextBytes_() { |
|
115
|
|
|
/** @type {!Array<number>} */ |
|
116
|
|
|
let bytes = []; |
|
117
|
|
|
this.enforceBext_(); |
|
118
|
|
|
if (this.bext.chunkId) { |
|
119
|
|
|
this.bext.chunkSize = 602 + this.bext.codingHistory.length; |
|
120
|
|
|
bytes = bytes.concat( |
|
121
|
|
|
packString(this.bext.chunkId), |
|
122
|
|
|
pack(602 + this.bext.codingHistory.length, this.uInt32_), |
|
123
|
|
|
this.writeString_(this.bext.description, 256), |
|
124
|
|
|
this.writeString_(this.bext.originator, 32), |
|
125
|
|
|
this.writeString_(this.bext.originatorReference, 32), |
|
126
|
|
|
this.writeString_(this.bext.originationDate, 10), |
|
127
|
|
|
this.writeString_(this.bext.originationTime, 8), |
|
128
|
|
|
pack(this.bext.timeReference[0], this.uInt32_), |
|
129
|
|
|
pack(this.bext.timeReference[1], this.uInt32_), |
|
130
|
|
|
pack(this.bext.version, this.uInt16_), |
|
131
|
|
|
this.writeString_(this.bext.UMID, 64), |
|
132
|
|
|
pack(this.bext.loudnessValue, this.uInt16_), |
|
133
|
|
|
pack(this.bext.loudnessRange, this.uInt16_), |
|
134
|
|
|
pack(this.bext.maxTruePeakLevel, this.uInt16_), |
|
135
|
|
|
pack(this.bext.maxMomentaryLoudness, this.uInt16_), |
|
136
|
|
|
pack(this.bext.maxShortTermLoudness, this.uInt16_), |
|
137
|
|
|
this.writeString_(this.bext.reserved, 180), |
|
138
|
|
|
this.writeString_( |
|
139
|
|
|
this.bext.codingHistory, this.bext.codingHistory.length)); |
|
140
|
|
|
} |
|
141
|
|
|
return bytes; |
|
142
|
|
|
} |
|
143
|
|
|
|
|
144
|
|
|
/** |
|
145
|
|
|
* Make sure a 'bext' chunk is created if BWF data was created in a file. |
|
146
|
|
|
* @private |
|
147
|
|
|
*/ |
|
148
|
|
|
enforceBext_() { |
|
149
|
|
|
for (var prop in this.bext) { |
|
150
|
|
|
if (this.bext.hasOwnProperty(prop)) { |
|
151
|
|
|
if (this.bext[prop] && prop != 'timeReference') { |
|
152
|
|
|
this.bext.chunkId = 'bext'; |
|
153
|
|
|
break; |
|
154
|
|
|
} |
|
155
|
|
|
} |
|
156
|
|
|
} |
|
157
|
|
|
if (this.bext.timeReference[0] || this.bext.timeReference[1]) { |
|
158
|
|
|
this.bext.chunkId = 'bext'; |
|
159
|
|
|
} |
|
160
|
|
|
} |
|
161
|
|
|
|
|
162
|
|
|
/** |
|
163
|
|
|
* Return the bytes of the 'ds64' chunk. |
|
164
|
|
|
* @return {!Array<number>} The 'ds64' chunk bytes. |
|
165
|
|
|
* @private |
|
166
|
|
|
*/ |
|
167
|
|
|
getDs64Bytes_() { |
|
168
|
|
|
/** @type {!Array<number>} */ |
|
169
|
|
|
let bytes = []; |
|
170
|
|
|
if (this.ds64.chunkId) { |
|
171
|
|
|
bytes = bytes.concat( |
|
172
|
|
|
packString(this.ds64.chunkId), |
|
173
|
|
|
pack(this.ds64.chunkSize, this.uInt32_), |
|
174
|
|
|
pack(this.ds64.riffSizeHigh, this.uInt32_), |
|
175
|
|
|
pack(this.ds64.riffSizeLow, this.uInt32_), |
|
176
|
|
|
pack(this.ds64.dataSizeHigh, this.uInt32_), |
|
177
|
|
|
pack(this.ds64.dataSizeLow, this.uInt32_), |
|
178
|
|
|
pack(this.ds64.originationTime, this.uInt32_), |
|
179
|
|
|
pack(this.ds64.sampleCountHigh, this.uInt32_), |
|
180
|
|
|
pack(this.ds64.sampleCountLow, this.uInt32_)); |
|
181
|
|
|
} |
|
182
|
|
|
//if (this.ds64.tableLength) { |
|
183
|
|
|
// ds64Bytes = ds64Bytes.concat( |
|
184
|
|
|
// pack(this.ds64.tableLength, this.uInt32_), |
|
185
|
|
|
// this.ds64.table); |
|
186
|
|
|
//} |
|
187
|
|
|
return bytes; |
|
188
|
|
|
} |
|
189
|
|
|
|
|
190
|
|
|
/** |
|
191
|
|
|
* Return the bytes of the 'cue ' chunk. |
|
192
|
|
|
* @return {!Array<number>} The 'cue ' chunk bytes. |
|
193
|
|
|
* @private |
|
194
|
|
|
*/ |
|
195
|
|
|
getCueBytes_() { |
|
196
|
|
|
/** @type {!Array<number>} */ |
|
197
|
|
|
let bytes = []; |
|
198
|
|
|
if (this.cue.chunkId) { |
|
199
|
|
|
/** @type {!Array<number>} */ |
|
200
|
|
|
let cuePointsBytes = this.getCuePointsBytes_(); |
|
201
|
|
|
bytes = bytes.concat( |
|
202
|
|
|
packString(this.cue.chunkId), |
|
203
|
|
|
pack(cuePointsBytes.length + 4, this.uInt32_), |
|
204
|
|
|
pack(this.cue.dwCuePoints, this.uInt32_), |
|
205
|
|
|
cuePointsBytes); |
|
206
|
|
|
} |
|
207
|
|
|
return bytes; |
|
208
|
|
|
} |
|
209
|
|
|
|
|
210
|
|
|
/** |
|
211
|
|
|
* Return the bytes of the 'cue ' points. |
|
212
|
|
|
* @return {!Array<number>} The 'cue ' points as an array of bytes. |
|
213
|
|
|
* @private |
|
214
|
|
|
*/ |
|
215
|
|
|
getCuePointsBytes_() { |
|
216
|
|
|
/** @type {!Array<number>} */ |
|
217
|
|
|
let points = []; |
|
218
|
|
|
for (let i=0; i<this.cue.dwCuePoints; i++) { |
|
219
|
|
|
points = points.concat( |
|
220
|
|
|
pack(this.cue.points[i].dwName, this.uInt32_), |
|
221
|
|
|
pack(this.cue.points[i].dwPosition, this.uInt32_), |
|
222
|
|
|
packString(this.cue.points[i].fccChunk), |
|
223
|
|
|
pack(this.cue.points[i].dwChunkStart, this.uInt32_), |
|
224
|
|
|
pack(this.cue.points[i].dwBlockStart, this.uInt32_), |
|
225
|
|
|
pack(this.cue.points[i].dwSampleOffset, this.uInt32_)); |
|
226
|
|
|
} |
|
227
|
|
|
return points; |
|
228
|
|
|
} |
|
229
|
|
|
|
|
230
|
|
|
/** |
|
231
|
|
|
* Return the bytes of the 'smpl' chunk. |
|
232
|
|
|
* @return {!Array<number>} The 'smpl' chunk bytes. |
|
233
|
|
|
* @private |
|
234
|
|
|
*/ |
|
235
|
|
|
getSmplBytes_() { |
|
236
|
|
|
/** @type {!Array<number>} */ |
|
237
|
|
|
let bytes = []; |
|
238
|
|
|
if (this.smpl.chunkId) { |
|
239
|
|
|
/** @type {!Array<number>} */ |
|
240
|
|
|
let smplLoopsBytes = this.getSmplLoopsBytes_(); |
|
241
|
|
|
bytes = bytes.concat( |
|
242
|
|
|
packString(this.smpl.chunkId), |
|
243
|
|
|
pack(smplLoopsBytes.length + 36, this.uInt32_), |
|
244
|
|
|
pack(this.smpl.dwManufacturer, this.uInt32_), |
|
245
|
|
|
pack(this.smpl.dwProduct, this.uInt32_), |
|
246
|
|
|
pack(this.smpl.dwSamplePeriod, this.uInt32_), |
|
247
|
|
|
pack(this.smpl.dwMIDIUnityNote, this.uInt32_), |
|
248
|
|
|
pack(this.smpl.dwMIDIPitchFraction, this.uInt32_), |
|
249
|
|
|
pack(this.smpl.dwSMPTEFormat, this.uInt32_), |
|
250
|
|
|
pack(this.smpl.dwSMPTEOffset, this.uInt32_), |
|
251
|
|
|
pack(this.smpl.dwNumSampleLoops, this.uInt32_), |
|
252
|
|
|
pack(this.smpl.dwSamplerData, this.uInt32_), |
|
253
|
|
|
smplLoopsBytes); |
|
254
|
|
|
} |
|
255
|
|
|
return bytes; |
|
256
|
|
|
} |
|
257
|
|
|
|
|
258
|
|
|
/** |
|
259
|
|
|
* Return the bytes of the 'smpl' loops. |
|
260
|
|
|
* @return {!Array<number>} The 'smpl' loops as an array of bytes. |
|
261
|
|
|
* @private |
|
262
|
|
|
*/ |
|
263
|
|
|
getSmplLoopsBytes_() { |
|
264
|
|
|
/** @type {!Array<number>} */ |
|
265
|
|
|
let loops = []; |
|
266
|
|
|
for (let i=0; i<this.smpl.dwNumSampleLoops; i++) { |
|
267
|
|
|
loops = loops.concat( |
|
268
|
|
|
pack(this.smpl.loops[i].dwName, this.uInt32_), |
|
269
|
|
|
pack(this.smpl.loops[i].dwType, this.uInt32_), |
|
270
|
|
|
pack(this.smpl.loops[i].dwStart, this.uInt32_), |
|
271
|
|
|
pack(this.smpl.loops[i].dwEnd, this.uInt32_), |
|
272
|
|
|
pack(this.smpl.loops[i].dwFraction, this.uInt32_), |
|
273
|
|
|
pack(this.smpl.loops[i].dwPlayCount, this.uInt32_)); |
|
274
|
|
|
} |
|
275
|
|
|
return loops; |
|
276
|
|
|
} |
|
277
|
|
|
|
|
278
|
|
|
/** |
|
279
|
|
|
* Return the bytes of the 'fact' chunk. |
|
280
|
|
|
* @return {!Array<number>} The 'fact' chunk bytes. |
|
281
|
|
|
* @private |
|
282
|
|
|
*/ |
|
283
|
|
|
getFactBytes_() { |
|
284
|
|
|
/** @type {!Array<number>} */ |
|
285
|
|
|
let bytes = []; |
|
286
|
|
|
if (this.fact.chunkId) { |
|
287
|
|
|
bytes = bytes.concat( |
|
288
|
|
|
packString(this.fact.chunkId), |
|
289
|
|
|
pack(this.fact.chunkSize, this.uInt32_), |
|
290
|
|
|
pack(this.fact.dwSampleLength, this.uInt32_)); |
|
291
|
|
|
} |
|
292
|
|
|
return bytes; |
|
293
|
|
|
} |
|
294
|
|
|
|
|
295
|
|
|
/** |
|
296
|
|
|
* Return the bytes of the 'fmt ' chunk. |
|
297
|
|
|
* @return {!Array<number>} The 'fmt' chunk bytes. |
|
298
|
|
|
* @throws {Error} if no 'fmt ' chunk is present. |
|
299
|
|
|
* @private |
|
300
|
|
|
*/ |
|
301
|
|
|
getFmtBytes_() { |
|
302
|
|
|
/** @type {!Array<number>} */ |
|
303
|
|
|
let fmtBytes = []; |
|
304
|
|
|
if (this.fmt.chunkId) { |
|
305
|
|
|
return fmtBytes.concat( |
|
306
|
|
|
packString(this.fmt.chunkId), |
|
307
|
|
|
pack(this.fmt.chunkSize, this.uInt32_), |
|
308
|
|
|
pack(this.fmt.audioFormat, this.uInt16_), |
|
309
|
|
|
pack(this.fmt.numChannels, this.uInt16_), |
|
310
|
|
|
pack(this.fmt.sampleRate, this.uInt32_), |
|
311
|
|
|
pack(this.fmt.byteRate, this.uInt32_), |
|
312
|
|
|
pack(this.fmt.blockAlign, this.uInt16_), |
|
313
|
|
|
pack(this.fmt.bitsPerSample, this.uInt16_), |
|
314
|
|
|
this.getFmtExtensionBytes_()); |
|
315
|
|
|
} |
|
316
|
|
|
throw Error('Could not find the "fmt " chunk'); |
|
317
|
|
|
} |
|
318
|
|
|
|
|
319
|
|
|
/** |
|
320
|
|
|
* Return the bytes of the fmt extension fields. |
|
321
|
|
|
* @return {!Array<number>} The fmt extension bytes. |
|
322
|
|
|
* @private |
|
323
|
|
|
*/ |
|
324
|
|
|
getFmtExtensionBytes_() { |
|
325
|
|
|
/** @type {!Array<number>} */ |
|
326
|
|
|
let extension = []; |
|
327
|
|
|
if (this.fmt.chunkSize > 16) { |
|
328
|
|
|
extension = extension.concat( |
|
329
|
|
|
pack(this.fmt.cbSize, this.uInt16_)); |
|
330
|
|
|
} |
|
331
|
|
|
if (this.fmt.chunkSize > 18) { |
|
332
|
|
|
extension = extension.concat( |
|
333
|
|
|
pack(this.fmt.validBitsPerSample, this.uInt16_)); |
|
334
|
|
|
} |
|
335
|
|
|
if (this.fmt.chunkSize > 20) { |
|
336
|
|
|
extension = extension.concat( |
|
337
|
|
|
pack(this.fmt.dwChannelMask, this.uInt32_)); |
|
338
|
|
|
} |
|
339
|
|
|
if (this.fmt.chunkSize > 24) { |
|
340
|
|
|
extension = extension.concat( |
|
341
|
|
|
pack(this.fmt.subformat[0], this.uInt32_), |
|
342
|
|
|
pack(this.fmt.subformat[1], this.uInt32_), |
|
343
|
|
|
pack(this.fmt.subformat[2], this.uInt32_), |
|
344
|
|
|
pack(this.fmt.subformat[3], this.uInt32_)); |
|
345
|
|
|
} |
|
346
|
|
|
return extension; |
|
347
|
|
|
} |
|
348
|
|
|
|
|
349
|
|
|
/** |
|
350
|
|
|
* Return the bytes of the 'LIST' chunk. |
|
351
|
|
|
* @return {!Array<number>} The 'LIST' chunk bytes. |
|
352
|
|
|
*/ |
|
353
|
|
|
getLISTBytes_() { |
|
354
|
|
|
/** @type {!Array<number>} */ |
|
355
|
|
|
let bytes = []; |
|
356
|
|
|
for (let i=0; i<this.LIST.length; i++) { |
|
357
|
|
|
/** @type {!Array<number>} */ |
|
358
|
|
|
let subChunksBytes = this.getLISTSubChunksBytes_( |
|
359
|
|
|
this.LIST[i].subChunks, this.LIST[i].format); |
|
360
|
|
|
bytes = bytes.concat( |
|
361
|
|
|
packString(this.LIST[i].chunkId), |
|
362
|
|
|
pack(subChunksBytes.length + 4, this.uInt32_), |
|
363
|
|
|
packString(this.LIST[i].format), |
|
364
|
|
|
subChunksBytes); |
|
365
|
|
|
} |
|
366
|
|
|
return bytes; |
|
367
|
|
|
} |
|
368
|
|
|
|
|
369
|
|
|
/** |
|
370
|
|
|
* Return the bytes of the sub chunks of a 'LIST' chunk. |
|
371
|
|
|
* @param {!Array<!Object>} subChunks The 'LIST' sub chunks. |
|
372
|
|
|
* @param {string} format The format of the 'LIST' chunk. |
|
373
|
|
|
* Currently supported values are 'adtl' or 'INFO'. |
|
374
|
|
|
* @return {!Array<number>} The sub chunk bytes. |
|
375
|
|
|
* @private |
|
376
|
|
|
*/ |
|
377
|
|
|
getLISTSubChunksBytes_(subChunks, format) { |
|
378
|
|
|
/** @type {!Array<number>} */ |
|
379
|
|
|
let bytes = []; |
|
380
|
|
|
for (let i=0; i<subChunks.length; i++) { |
|
381
|
|
|
if (format == 'INFO') { |
|
382
|
|
|
bytes = bytes.concat( |
|
383
|
|
|
packString(subChunks[i].chunkId), |
|
384
|
|
|
pack(subChunks[i].value.length + 1, this.uInt32_), |
|
385
|
|
|
this.writeString_( |
|
386
|
|
|
subChunks[i].value, subChunks[i].value.length)); |
|
387
|
|
|
bytes.push(0); |
|
388
|
|
|
} else if (format == 'adtl') { |
|
389
|
|
|
if (['labl', 'note'].indexOf(subChunks[i].chunkId) > -1) { |
|
390
|
|
|
bytes = bytes.concat( |
|
391
|
|
|
packString(subChunks[i].chunkId), |
|
392
|
|
|
pack( |
|
393
|
|
|
subChunks[i].value.length + 4 + 1, this.uInt32_), |
|
394
|
|
|
pack(subChunks[i].dwName, this.uInt32_), |
|
395
|
|
|
this.writeString_( |
|
396
|
|
|
subChunks[i].value, |
|
397
|
|
|
subChunks[i].value.length)); |
|
398
|
|
|
bytes.push(0); |
|
399
|
|
|
} else if (subChunks[i].chunkId == 'ltxt') { |
|
400
|
|
|
bytes = bytes.concat( |
|
401
|
|
|
this.getLtxtChunkBytes_(subChunks[i])); |
|
402
|
|
|
} |
|
403
|
|
|
} |
|
404
|
|
|
if (bytes.length % 2) { |
|
405
|
|
|
bytes.push(0); |
|
406
|
|
|
} |
|
407
|
|
|
} |
|
408
|
|
|
return bytes; |
|
409
|
|
|
} |
|
410
|
|
|
|
|
411
|
|
|
/** |
|
412
|
|
|
* Return the bytes of a 'ltxt' chunk. |
|
413
|
|
|
* @param {!Object} ltxt the 'ltxt' chunk. |
|
414
|
|
|
* @return {!Array<number>} The 'ltxt' chunk bytes. |
|
415
|
|
|
* @private |
|
416
|
|
|
*/ |
|
417
|
|
|
getLtxtChunkBytes_(ltxt) { |
|
418
|
|
|
return [].concat( |
|
419
|
|
|
packString(ltxt.chunkId), |
|
420
|
|
|
pack(ltxt.value.length + 20, this.uInt32_), |
|
421
|
|
|
pack(ltxt.dwName, this.uInt32_), |
|
422
|
|
|
pack(ltxt.dwSampleLength, this.uInt32_), |
|
423
|
|
|
pack(ltxt.dwPurposeID, this.uInt32_), |
|
424
|
|
|
pack(ltxt.dwCountry, this.uInt16_), |
|
425
|
|
|
pack(ltxt.dwLanguage, this.uInt16_), |
|
426
|
|
|
pack(ltxt.dwDialect, this.uInt16_), |
|
427
|
|
|
pack(ltxt.dwCodePage, this.uInt16_), |
|
428
|
|
|
this.writeString_(ltxt.value, ltxt.value.length)); |
|
429
|
|
|
} |
|
430
|
|
|
|
|
431
|
|
|
/** |
|
432
|
|
|
* Return the bytes of the 'junk' chunk. |
|
433
|
|
|
* @return {!Array<number>} The 'junk' chunk bytes. |
|
434
|
|
|
* @private |
|
435
|
|
|
*/ |
|
436
|
|
|
getJunkBytes_() { |
|
437
|
|
|
/** @type {!Array<number>} */ |
|
438
|
|
|
let bytes = []; |
|
439
|
|
|
if (this.junk.chunkId) { |
|
440
|
|
|
return bytes.concat( |
|
441
|
|
|
packString(this.junk.chunkId), |
|
442
|
|
|
pack(this.junk.chunkData.length, this.uInt32_), |
|
443
|
|
|
this.junk.chunkData); |
|
444
|
|
|
} |
|
445
|
|
|
return bytes; |
|
446
|
|
|
} |
|
447
|
|
|
|
|
448
|
|
|
/** |
|
449
|
|
|
* Return 'RIFF' if the container is 'RF64', the current container name |
|
450
|
|
|
* otherwise. Used to enforce 'RIFF' when RF64 is not allowed. |
|
451
|
|
|
* @return {string} |
|
452
|
|
|
* @private |
|
453
|
|
|
*/ |
|
454
|
|
|
correctContainer_() { |
|
455
|
|
|
return this.container == 'RF64' ? 'RIFF' : this.container; |
|
456
|
|
|
} |
|
457
|
|
|
|
|
458
|
|
|
/** |
|
459
|
|
|
* Set the string code of the bit depth based on the 'fmt ' chunk. |
|
460
|
|
|
* @private |
|
461
|
|
|
*/ |
|
462
|
|
|
bitDepthFromFmt_() { |
|
463
|
|
|
if (this.fmt.audioFormat === 3 && this.fmt.bitsPerSample === 32) { |
|
464
|
|
|
this.bitDepth = '32f'; |
|
465
|
|
|
} else if (this.fmt.audioFormat === 6) { |
|
466
|
|
|
this.bitDepth = '8a'; |
|
467
|
|
|
} else if (this.fmt.audioFormat === 7) { |
|
468
|
|
|
this.bitDepth = '8m'; |
|
469
|
|
|
} else { |
|
470
|
|
|
this.bitDepth = this.fmt.bitsPerSample.toString(); |
|
471
|
|
|
} |
|
472
|
|
|
} |
|
473
|
|
|
|
|
474
|
|
|
/** |
|
475
|
|
|
* Return a .wav file byte buffer with the data from the WaveFile object. |
|
476
|
|
|
* The return value of this method can be written straight to disk. |
|
477
|
|
|
* @return {!Uint8Array} The wav file bytes. |
|
478
|
|
|
* @private |
|
479
|
|
|
*/ |
|
480
|
|
|
createWaveFile_() { |
|
481
|
|
|
/** @type {!Array<!Array<number>>} */ |
|
482
|
|
|
let fileBody = [ |
|
483
|
|
|
this.getJunkBytes_(), |
|
484
|
|
|
this.getDs64Bytes_(), |
|
485
|
|
|
this.getBextBytes_(), |
|
486
|
|
|
this.getFmtBytes_(), |
|
487
|
|
|
this.getFactBytes_(), |
|
488
|
|
|
packString(this.data.chunkId), |
|
489
|
|
|
pack(this.data.samples.length, this.uInt32_), |
|
490
|
|
|
this.data.samples, |
|
491
|
|
|
this.getCueBytes_(), |
|
492
|
|
|
this.getSmplBytes_(), |
|
493
|
|
|
this.getLISTBytes_() |
|
494
|
|
|
]; |
|
495
|
|
|
/** @type {number} */ |
|
496
|
|
|
let fileBodyLength = 0; |
|
497
|
|
|
for (let i=0; i<fileBody.length; i++) { |
|
498
|
|
|
fileBodyLength += fileBody[i].length; |
|
499
|
|
|
} |
|
500
|
|
|
/** @type {!Uint8Array} */ |
|
501
|
|
|
let file = new Uint8Array(fileBodyLength + 12); |
|
502
|
|
|
/** @type {number} */ |
|
503
|
|
|
let index = 0; |
|
504
|
|
|
index = packStringTo(this.container, file, index); |
|
505
|
|
|
index = packTo(fileBodyLength + 4, this.uInt32_, file, index); |
|
506
|
|
|
index = packStringTo(this.format, file, index); |
|
507
|
|
|
for (let i=0; i<fileBody.length; i++) { |
|
508
|
|
|
file.set(fileBody[i], index); |
|
509
|
|
|
index += fileBody[i].length; |
|
510
|
|
|
} |
|
511
|
|
|
return file; |
|
512
|
|
|
} |
|
513
|
|
|
|
|
514
|
|
|
/** |
|
515
|
|
|
* Update the type definition used to read and write the samples. |
|
516
|
|
|
* @private |
|
517
|
|
|
*/ |
|
518
|
|
|
updateDataType_() { |
|
519
|
|
|
/** @type {!Object} */ |
|
520
|
|
|
this.dataType = { |
|
521
|
|
|
bits: ((parseInt(this.bitDepth, 10) - 1) | 7) + 1, |
|
522
|
|
|
float: this.bitDepth == '32f' || this.bitDepth == '64', |
|
523
|
|
|
signed: this.bitDepth != '8', |
|
524
|
|
|
be: this.container == 'RIFX' |
|
525
|
|
|
}; |
|
526
|
|
|
if (['4', '8a', '8m'].indexOf(this.bitDepth) > -1 ) { |
|
527
|
|
|
this.dataType.bits = 8; |
|
528
|
|
|
this.dataType.signed = false; |
|
529
|
|
|
} |
|
530
|
|
|
} |
|
531
|
|
|
|
|
532
|
|
|
/** |
|
533
|
|
|
* Set up the WaveFile object from a byte buffer. |
|
534
|
|
|
* @param {!Uint8Array} buffer The buffer. |
|
535
|
|
|
* @param {boolean=} samples True if the samples should be loaded. |
|
536
|
|
|
* @throws {Error} If container is not RIFF, RIFX or RF64. |
|
537
|
|
|
* @throws {Error} If no 'fmt ' chunk is found. |
|
538
|
|
|
* @throws {Error} If no 'data' chunk is found. |
|
539
|
|
|
*/ |
|
540
|
|
|
readWavBuffer(buffer, samples=true) { |
|
541
|
|
|
this.head_ = 0; |
|
542
|
|
|
this.clearHeader_(); |
|
543
|
|
|
this.readRIFFChunk_(buffer); |
|
544
|
|
|
/** @type {!Object} */ |
|
545
|
|
|
let chunk = riffChunks(buffer); |
|
546
|
|
|
this.readDs64Chunk_(buffer, chunk.subChunks); |
|
547
|
|
|
this.readFmtChunk_(buffer, chunk.subChunks); |
|
548
|
|
|
this.readFactChunk_(buffer, chunk.subChunks); |
|
549
|
|
|
this.readBextChunk_(buffer, chunk.subChunks); |
|
550
|
|
|
this.readCueChunk_(buffer, chunk.subChunks); |
|
551
|
|
|
this.readSmplChunk_(buffer, chunk.subChunks); |
|
552
|
|
|
this.readDataChunk_(buffer, chunk.subChunks, samples); |
|
553
|
|
|
this.readJunkChunk_(buffer, chunk.subChunks); |
|
554
|
|
|
this.readLISTChunk_(buffer, chunk.subChunks); |
|
555
|
|
|
this.bitDepthFromFmt_(); |
|
556
|
|
|
this.updateDataType_(); |
|
557
|
|
|
} |
|
558
|
|
|
|
|
559
|
|
|
/** |
|
560
|
|
|
* Create the header of a ADPCM wave file. |
|
561
|
|
|
* @param {string} bitDepthCode The audio bit depth |
|
562
|
|
|
* @param {number} numChannels The number of channels |
|
563
|
|
|
* @param {number} sampleRate The sample rate. |
|
564
|
|
|
* @param {number} numBytes The number of bytes each sample use. |
|
565
|
|
|
* @param {!Object} options The extra options, like container defintion. |
|
566
|
|
|
* @private |
|
567
|
|
|
*/ |
|
568
|
|
|
createADPCMHeader_(bitDepthCode, numChannels, sampleRate, numBytes, options) { |
|
569
|
|
|
this.createPCMHeader_( |
|
570
|
|
|
bitDepthCode, numChannels, sampleRate, numBytes, options); |
|
571
|
|
|
this.chunkSize = 40 + this.data.samples.length; |
|
572
|
|
|
this.fmt.chunkSize = 20; |
|
573
|
|
|
this.fmt.byteRate = 4055; |
|
574
|
|
|
this.fmt.blockAlign = 256; |
|
575
|
|
|
this.fmt.bitsPerSample = 4; |
|
576
|
|
|
this.fmt.cbSize = 2; |
|
577
|
|
|
this.fmt.validBitsPerSample = 505; |
|
578
|
|
|
this.fact.chunkId = 'fact'; |
|
579
|
|
|
this.fact.chunkSize = 4; |
|
580
|
|
|
this.fact.dwSampleLength = this.data.samples.length * 2; |
|
581
|
|
|
this.data.chunkSize = this.data.samples.length; |
|
582
|
|
|
} |
|
583
|
|
|
|
|
584
|
|
|
/** |
|
585
|
|
|
* Create the header of WAVE_FORMAT_EXTENSIBLE file. |
|
586
|
|
|
* @param {string} bitDepthCode The audio bit depth |
|
587
|
|
|
* @param {number} numChannels The number of channels |
|
588
|
|
|
* @param {number} sampleRate The sample rate. |
|
589
|
|
|
* @param {number} numBytes The number of bytes each sample use. |
|
590
|
|
|
* @param {!Object} options The extra options, like container defintion. |
|
591
|
|
|
* @private |
|
592
|
|
|
*/ |
|
593
|
|
|
createExtensibleHeader_( |
|
594
|
|
|
bitDepthCode, numChannels, sampleRate, numBytes, options) { |
|
595
|
|
|
this.createPCMHeader_( |
|
596
|
|
|
bitDepthCode, numChannels, sampleRate, numBytes, options); |
|
597
|
|
|
this.chunkSize = 36 + 24 + this.data.samples.length; |
|
598
|
|
|
this.fmt.chunkSize = 40; |
|
599
|
|
|
this.fmt.bitsPerSample = ((parseInt(bitDepthCode, 10) - 1) | 7) + 1; |
|
600
|
|
|
this.fmt.cbSize = 22; |
|
601
|
|
|
this.fmt.validBitsPerSample = parseInt(bitDepthCode, 10); |
|
602
|
|
|
this.fmt.dwChannelMask = this.getDwChannelMask_(); |
|
603
|
|
|
// subformat 128-bit GUID as 4 32-bit values |
|
604
|
|
|
// only supports uncompressed integer PCM samples |
|
605
|
|
|
this.fmt.subformat = [1, 1048576, 2852126848, 1905997824]; |
|
606
|
|
|
} |
|
607
|
|
|
|
|
608
|
|
|
/** |
|
609
|
|
|
* Get the value for dwChannelMask according to the number of channels. |
|
610
|
|
|
* @return {number} the dwChannelMask value. |
|
611
|
|
|
* @private |
|
612
|
|
|
*/ |
|
613
|
|
|
getDwChannelMask_() { |
|
614
|
|
|
/** @type {number} */ |
|
615
|
|
|
let dwChannelMask = 0; |
|
616
|
|
|
// mono = FC |
|
617
|
|
|
if (this.fmt.numChannels === 1) { |
|
618
|
|
|
dwChannelMask = 0x4; |
|
619
|
|
|
// stereo = FL, FR |
|
620
|
|
|
} else if (this.fmt.numChannels === 2) { |
|
621
|
|
|
dwChannelMask = 0x3; |
|
622
|
|
|
// quad = FL, FR, BL, BR |
|
623
|
|
|
} else if (this.fmt.numChannels === 4) { |
|
624
|
|
|
dwChannelMask = 0x33; |
|
625
|
|
|
// 5.1 = FL, FR, FC, LF, BL, BR |
|
626
|
|
|
} else if (this.fmt.numChannels === 6) { |
|
627
|
|
|
dwChannelMask = 0x3F; |
|
628
|
|
|
// 7.1 = FL, FR, FC, LF, BL, BR, SL, SR |
|
629
|
|
|
} else if (this.fmt.numChannels === 8) { |
|
630
|
|
|
dwChannelMask = 0x63F; |
|
631
|
|
|
} |
|
632
|
|
|
return dwChannelMask; |
|
633
|
|
|
} |
|
634
|
|
|
|
|
635
|
|
|
/** |
|
636
|
|
|
* Create the header of mu-Law and A-Law wave files. |
|
637
|
|
|
* @param {string} bitDepthCode The audio bit depth |
|
638
|
|
|
* @param {number} numChannels The number of channels |
|
639
|
|
|
* @param {number} sampleRate The sample rate. |
|
640
|
|
|
* @param {number} numBytes The number of bytes each sample use. |
|
641
|
|
|
* @param {!Object} options The extra options, like container defintion. |
|
642
|
|
|
* @private |
|
643
|
|
|
*/ |
|
644
|
|
|
createALawMulawHeader_( |
|
645
|
|
|
bitDepthCode, numChannels, sampleRate, numBytes, options) { |
|
646
|
|
|
this.createPCMHeader_( |
|
647
|
|
|
bitDepthCode, numChannels, sampleRate, numBytes, options); |
|
648
|
|
|
this.chunkSize = 40 + this.data.samples.length; |
|
649
|
|
|
this.fmt.chunkSize = 20; |
|
650
|
|
|
this.fmt.cbSize = 2; |
|
651
|
|
|
this.fmt.validBitsPerSample = 8; |
|
652
|
|
|
this.fact.chunkId = 'fact'; |
|
653
|
|
|
this.fact.chunkSize = 4; |
|
654
|
|
|
this.fact.dwSampleLength = this.data.samples.length; |
|
655
|
|
|
} |
|
656
|
|
|
|
|
657
|
|
|
/** |
|
658
|
|
|
* Create the header of a linear PCM wave file. |
|
659
|
|
|
* @param {string} bitDepthCode The audio bit depth |
|
660
|
|
|
* @param {number} numChannels The number of channels |
|
661
|
|
|
* @param {number} sampleRate The sample rate. |
|
662
|
|
|
* @param {number} numBytes The number of bytes each sample use. |
|
663
|
|
|
* @param {!Object} options The extra options, like container defintion. |
|
664
|
|
|
* @private |
|
665
|
|
|
*/ |
|
666
|
|
|
createPCMHeader_(bitDepthCode, numChannels, sampleRate, numBytes, options) { |
|
667
|
|
|
this.clearHeader_(); |
|
668
|
|
|
this.container = options.container; |
|
669
|
|
|
this.chunkSize = 36 + this.data.samples.length; |
|
670
|
|
|
this.format = 'WAVE'; |
|
671
|
|
|
this.fmt.chunkId = 'fmt '; |
|
672
|
|
|
this.fmt.chunkSize = 16; |
|
673
|
|
|
this.fmt.byteRate = (numChannels * numBytes) * sampleRate; |
|
674
|
|
|
this.fmt.blockAlign = numChannels * numBytes; |
|
675
|
|
|
this.fmt.audioFormat = this.audioFormats_[bitDepthCode] ? |
|
676
|
|
|
this.audioFormats_[bitDepthCode] : 65534; |
|
677
|
|
|
this.fmt.numChannels = numChannels; |
|
678
|
|
|
this.fmt.sampleRate = sampleRate; |
|
679
|
|
|
this.fmt.bitsPerSample = parseInt(bitDepthCode, 10); |
|
680
|
|
|
this.fmt.cbSize = 0; |
|
681
|
|
|
this.fmt.validBitsPerSample = 0; |
|
682
|
|
|
} |
|
683
|
|
|
|
|
684
|
|
|
/** |
|
685
|
|
|
* Return the closest greater number of bits for a number of bits that |
|
686
|
|
|
* do not fill a full sequence of bytes. |
|
687
|
|
|
* @param {string} bitDepthCode The bit depth. |
|
688
|
|
|
* @return {string} |
|
689
|
|
|
* @private |
|
690
|
|
|
*/ |
|
691
|
|
|
realBitDepth_(bitDepthCode) { |
|
692
|
|
|
if (bitDepthCode != '32f') { |
|
693
|
|
|
bitDepthCode = (((parseInt(bitDepthCode, 10) - 1) | 7) + 1).toString(); |
|
694
|
|
|
} |
|
695
|
|
|
return bitDepthCode; |
|
696
|
|
|
} |
|
697
|
|
|
|
|
698
|
|
|
/** |
|
699
|
|
|
* Validate the header of the file. |
|
700
|
|
|
* @throws {Error} If any property of the object appears invalid. |
|
701
|
|
|
* @private |
|
702
|
|
|
*/ |
|
703
|
|
|
validateHeader_() { |
|
704
|
|
|
this.validateBitDepth_(); |
|
705
|
|
|
this.validateNumChannels_(); |
|
706
|
|
|
this.validateSampleRate_(); |
|
707
|
|
|
} |
|
708
|
|
|
|
|
709
|
|
|
/** |
|
710
|
|
|
* Validate the bit depth. |
|
711
|
|
|
* @return {boolean} True is the bit depth is valid. |
|
712
|
|
|
* @throws {Error} If bit depth is invalid. |
|
713
|
|
|
* @private |
|
714
|
|
|
*/ |
|
715
|
|
|
validateBitDepth_() { |
|
716
|
|
|
if (!this.audioFormats_[this.bitDepth]) { |
|
717
|
|
|
if (parseInt(this.bitDepth, 10) > 8 && |
|
718
|
|
|
parseInt(this.bitDepth, 10) < 54) { |
|
719
|
|
|
return true; |
|
720
|
|
|
} |
|
721
|
|
|
throw new Error('Invalid bit depth.'); |
|
722
|
|
|
} |
|
723
|
|
|
return true; |
|
724
|
|
|
} |
|
725
|
|
|
|
|
726
|
|
|
/** |
|
727
|
|
|
* Validate the number of channels. |
|
728
|
|
|
* @return {boolean} True is the number of channels is valid. |
|
729
|
|
|
* @throws {Error} If the number of channels is invalid. |
|
730
|
|
|
* @private |
|
731
|
|
|
*/ |
|
732
|
|
|
validateNumChannels_() { |
|
733
|
|
|
/** @type {number} */ |
|
734
|
|
|
let blockAlign = this.fmt.numChannels * this.fmt.bitsPerSample / 8; |
|
735
|
|
|
if (this.fmt.numChannels < 1 || blockAlign > 65535) { |
|
736
|
|
|
throw new Error('Invalid number of channels.'); |
|
737
|
|
|
} |
|
738
|
|
|
return true; |
|
739
|
|
|
} |
|
740
|
|
|
|
|
741
|
|
|
/** |
|
742
|
|
|
* Validate the sample rate value. |
|
743
|
|
|
* @return {boolean} True is the sample rate is valid. |
|
744
|
|
|
* @throws {Error} If the sample rate is invalid. |
|
745
|
|
|
* @private |
|
746
|
|
|
*/ |
|
747
|
|
|
validateSampleRate_() { |
|
748
|
|
|
/** @type {number} */ |
|
749
|
|
|
let byteRate = this.fmt.numChannels * |
|
750
|
|
|
(this.fmt.bitsPerSample / 8) * this.fmt.sampleRate; |
|
751
|
|
|
if (this.fmt.sampleRate < 1 || byteRate > 4294967295) { |
|
752
|
|
|
throw new Error('Invalid sample rate.'); |
|
753
|
|
|
} |
|
754
|
|
|
return true; |
|
755
|
|
|
} |
|
756
|
|
|
|
|
757
|
|
|
/** |
|
758
|
|
|
* Reset attributes that should emptied when a file is |
|
759
|
|
|
* created with the fromScratch() or fromBuffer() methods. |
|
760
|
|
|
* @private |
|
761
|
|
|
*/ |
|
762
|
|
|
clearHeader_() { |
|
763
|
|
|
this.fmt.cbSize = 0; |
|
764
|
|
|
this.fmt.validBitsPerSample = 0; |
|
765
|
|
|
this.fact.chunkId = ''; |
|
766
|
|
|
this.ds64.chunkId = ''; |
|
767
|
|
|
} |
|
768
|
|
|
|
|
769
|
|
|
/** |
|
770
|
|
|
* Set up to work wih big-endian or little-endian files. |
|
771
|
|
|
* The types used are changed to LE or BE. If the |
|
772
|
|
|
* the file is big-endian (RIFX), true is returned. |
|
773
|
|
|
* @return {boolean} True if the file is RIFX. |
|
774
|
|
|
* @private |
|
775
|
|
|
*/ |
|
776
|
|
|
LEorBE_() { |
|
777
|
|
|
/** @type {boolean} */ |
|
778
|
|
|
let bigEndian = this.container === 'RIFX'; |
|
779
|
|
|
this.uInt16_.be = bigEndian; |
|
780
|
|
|
this.uInt32_.be = bigEndian; |
|
781
|
|
|
return bigEndian; |
|
782
|
|
|
} |
|
783
|
|
|
|
|
784
|
|
|
/** |
|
785
|
|
|
* Find a chunk by its fourCC_ in a array of RIFF chunks. |
|
786
|
|
|
* @param {!Object} chunks The wav file chunks. |
|
787
|
|
|
* @param {string} chunkId The chunk fourCC_. |
|
788
|
|
|
* @param {boolean} multiple True if there may be multiple chunks |
|
789
|
|
|
* with the same chunkId. |
|
790
|
|
|
* @return {?Array<!Object>} |
|
791
|
|
|
* @private |
|
792
|
|
|
*/ |
|
793
|
|
|
findChunk_(chunks, chunkId, multiple=false) { |
|
794
|
|
|
/** @type {!Array<!Object>} */ |
|
795
|
|
|
let chunk = []; |
|
796
|
|
|
for (let i=0; i<chunks.length; i++) { |
|
797
|
|
|
if (chunks[i].chunkId == chunkId) { |
|
798
|
|
|
if (multiple) { |
|
799
|
|
|
chunk.push(chunks[i]); |
|
800
|
|
|
} else { |
|
801
|
|
|
return chunks[i]; |
|
802
|
|
|
} |
|
803
|
|
|
} |
|
804
|
|
|
} |
|
805
|
|
|
if (chunkId == 'LIST') { |
|
806
|
|
|
return chunk.length ? chunk : null; |
|
807
|
|
|
} |
|
808
|
|
|
return null; |
|
809
|
|
|
} |
|
810
|
|
|
|
|
811
|
|
|
/** |
|
812
|
|
|
* Read the RIFF chunk a wave file. |
|
813
|
|
|
* @param {!Uint8Array} bytes A wav buffer. |
|
814
|
|
|
* @throws {Error} If no 'RIFF' chunk is found. |
|
815
|
|
|
* @private |
|
816
|
|
|
*/ |
|
817
|
|
|
readRIFFChunk_(bytes) { |
|
818
|
|
|
this.head_ = 0; |
|
819
|
|
|
this.container = this.readString_(bytes, 4); |
|
820
|
|
|
if (['RIFF', 'RIFX', 'RF64'].indexOf(this.container) === -1) { |
|
821
|
|
|
throw Error('Not a supported format.'); |
|
822
|
|
|
} |
|
823
|
|
|
this.LEorBE_(); |
|
824
|
|
|
this.chunkSize = this.read_(bytes, this.uInt32_); |
|
825
|
|
|
this.format = this.readString_(bytes, 4); |
|
826
|
|
|
if (this.format != 'WAVE') { |
|
827
|
|
|
throw Error('Could not find the "WAVE" format identifier'); |
|
828
|
|
|
} |
|
829
|
|
|
} |
|
830
|
|
|
|
|
831
|
|
|
/** |
|
832
|
|
|
* Read the 'fmt ' chunk of a wave file. |
|
833
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
834
|
|
|
* @param {!Object} signature The file signature. |
|
835
|
|
|
* @throws {Error} If no 'fmt ' chunk is found. |
|
836
|
|
|
* @private |
|
837
|
|
|
*/ |
|
838
|
|
|
readFmtChunk_(buffer, signature) { |
|
839
|
|
|
/** @type {?Object} */ |
|
840
|
|
|
let chunk = this.findChunk_(signature, 'fmt '); |
|
841
|
|
|
if (chunk) { |
|
842
|
|
|
this.head_ = chunk.chunkData.start; |
|
843
|
|
|
this.fmt.chunkId = chunk.chunkId; |
|
844
|
|
|
this.fmt.chunkSize = chunk.chunkSize; |
|
845
|
|
|
this.fmt.audioFormat = this.read_(buffer, this.uInt16_); |
|
846
|
|
|
this.fmt.numChannels = this.read_(buffer, this.uInt16_); |
|
847
|
|
|
this.fmt.sampleRate = this.read_(buffer, this.uInt32_); |
|
848
|
|
|
this.fmt.byteRate = this.read_(buffer, this.uInt32_); |
|
849
|
|
|
this.fmt.blockAlign = this.read_(buffer, this.uInt16_); |
|
850
|
|
|
this.fmt.bitsPerSample = this.read_(buffer, this.uInt16_); |
|
851
|
|
|
this.readFmtExtension_(buffer); |
|
852
|
|
|
} else { |
|
853
|
|
|
throw Error('Could not find the "fmt " chunk'); |
|
854
|
|
|
} |
|
855
|
|
|
} |
|
856
|
|
|
|
|
857
|
|
|
/** |
|
858
|
|
|
* Read the 'fmt ' chunk extension. |
|
859
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
860
|
|
|
* @private |
|
861
|
|
|
*/ |
|
862
|
|
|
readFmtExtension_(buffer) { |
|
863
|
|
|
if (this.fmt.chunkSize > 16) { |
|
864
|
|
|
this.fmt.cbSize = this.read_(buffer, this.uInt16_); |
|
865
|
|
|
if (this.fmt.chunkSize > 18) { |
|
866
|
|
|
this.fmt.validBitsPerSample = this.read_(buffer, this.uInt16_); |
|
867
|
|
|
if (this.fmt.chunkSize > 20) { |
|
868
|
|
|
this.fmt.dwChannelMask = this.read_(buffer, this.uInt32_); |
|
869
|
|
|
this.fmt.subformat = [ |
|
870
|
|
|
this.read_(buffer, this.uInt32_), |
|
871
|
|
|
this.read_(buffer, this.uInt32_), |
|
872
|
|
|
this.read_(buffer, this.uInt32_), |
|
873
|
|
|
this.read_(buffer, this.uInt32_)]; |
|
874
|
|
|
} |
|
875
|
|
|
} |
|
876
|
|
|
} |
|
877
|
|
|
} |
|
878
|
|
|
|
|
879
|
|
|
/** |
|
880
|
|
|
* Read the 'fact' chunk of a wav file. |
|
881
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
882
|
|
|
* @param {!Object} signature The file signature. |
|
883
|
|
|
* @private |
|
884
|
|
|
*/ |
|
885
|
|
|
readFactChunk_(buffer, signature) { |
|
886
|
|
|
/** @type {?Object} */ |
|
887
|
|
|
let chunk = this.findChunk_(signature, 'fact'); |
|
888
|
|
|
if (chunk) { |
|
889
|
|
|
this.head_ = chunk.chunkData.start; |
|
890
|
|
|
this.fact.chunkId = chunk.chunkId; |
|
891
|
|
|
this.fact.chunkSize = chunk.chunkSize; |
|
892
|
|
|
this.fact.dwSampleLength = this.read_(buffer, this.uInt32_); |
|
893
|
|
|
} |
|
894
|
|
|
} |
|
895
|
|
|
|
|
896
|
|
|
/** |
|
897
|
|
|
* Read the 'cue ' chunk of a wave file. |
|
898
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
899
|
|
|
* @param {!Object} signature The file signature. |
|
900
|
|
|
* @private |
|
901
|
|
|
*/ |
|
902
|
|
|
readCueChunk_(buffer, signature) { |
|
903
|
|
|
/** @type {?Object} */ |
|
904
|
|
|
let chunk = this.findChunk_(signature, 'cue '); |
|
905
|
|
|
if (chunk) { |
|
906
|
|
|
this.head_ = chunk.chunkData.start; |
|
907
|
|
|
this.cue.chunkId = chunk.chunkId; |
|
908
|
|
|
this.cue.chunkSize = chunk.chunkSize; |
|
909
|
|
|
this.cue.dwCuePoints = this.read_(buffer, this.uInt32_); |
|
910
|
|
|
for (let i=0; i<this.cue.dwCuePoints; i++) { |
|
911
|
|
|
this.cue.points.push({ |
|
912
|
|
|
dwName: this.read_(buffer, this.uInt32_), |
|
913
|
|
|
dwPosition: this.read_(buffer, this.uInt32_), |
|
914
|
|
|
fccChunk: this.readString_(buffer, 4), |
|
915
|
|
|
dwChunkStart: this.read_(buffer, this.uInt32_), |
|
916
|
|
|
dwBlockStart: this.read_(buffer, this.uInt32_), |
|
917
|
|
|
dwSampleOffset: this.read_(buffer, this.uInt32_), |
|
918
|
|
|
}); |
|
919
|
|
|
} |
|
920
|
|
|
} |
|
921
|
|
|
} |
|
922
|
|
|
|
|
923
|
|
|
/** |
|
924
|
|
|
* Read the 'smpl' chunk of a wave file. |
|
925
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
926
|
|
|
* @param {!Object} signature The file signature. |
|
927
|
|
|
* @private |
|
928
|
|
|
*/ |
|
929
|
|
|
readSmplChunk_(buffer, signature) { |
|
930
|
|
|
/** @type {?Object} */ |
|
931
|
|
|
let chunk = this.findChunk_(signature, 'smpl'); |
|
932
|
|
|
if (chunk) { |
|
933
|
|
|
this.head_ = chunk.chunkData.start; |
|
934
|
|
|
this.smpl.chunkId = chunk.chunkId; |
|
935
|
|
|
this.smpl.chunkSize = chunk.chunkSize; |
|
936
|
|
|
this.smpl.dwManufacturer = this.read_(buffer, this.uInt32_); |
|
937
|
|
|
this.smpl.dwProduct = this.read_(buffer, this.uInt32_); |
|
938
|
|
|
this.smpl.dwSamplePeriod = this.read_(buffer, this.uInt32_); |
|
939
|
|
|
this.smpl.dwMIDIUnityNote = this.read_(buffer, this.uInt32_); |
|
940
|
|
|
this.smpl.dwMIDIPitchFraction = this.read_(buffer, this.uInt32_); |
|
941
|
|
|
this.smpl.dwSMPTEFormat = this.read_(buffer, this.uInt32_); |
|
942
|
|
|
this.smpl.dwSMPTEOffset = this.read_(buffer, this.uInt32_); |
|
943
|
|
|
this.smpl.dwNumSampleLoops = this.read_(buffer, this.uInt32_); |
|
944
|
|
|
this.smpl.dwSamplerData = this.read_(buffer, this.uInt32_); |
|
945
|
|
|
for (let i=0; i<this.smpl.dwNumSampleLoops; i++) { |
|
946
|
|
|
this.smpl.loops.push({ |
|
947
|
|
|
dwName: this.read_(buffer, this.uInt32_), |
|
948
|
|
|
dwType: this.read_(buffer, this.uInt32_), |
|
949
|
|
|
dwStart: this.read_(buffer, this.uInt32_), |
|
950
|
|
|
dwEnd: this.read_(buffer, this.uInt32_), |
|
951
|
|
|
dwFraction: this.read_(buffer, this.uInt32_), |
|
952
|
|
|
dwPlayCount: this.read_(buffer, this.uInt32_), |
|
953
|
|
|
}); |
|
954
|
|
|
} |
|
955
|
|
|
} |
|
956
|
|
|
} |
|
957
|
|
|
|
|
958
|
|
|
/** |
|
959
|
|
|
* Read the 'data' chunk of a wave file. |
|
960
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
961
|
|
|
* @param {!Object} signature The file signature. |
|
962
|
|
|
* @param {boolean} samples True if the samples should be loaded. |
|
963
|
|
|
* @throws {Error} If no 'data' chunk is found. |
|
964
|
|
|
* @private |
|
965
|
|
|
*/ |
|
966
|
|
|
readDataChunk_(buffer, signature, samples) { |
|
967
|
|
|
/** @type {?Object} */ |
|
968
|
|
|
let chunk = this.findChunk_(signature, 'data'); |
|
969
|
|
|
if (chunk) { |
|
970
|
|
|
this.data.chunkId = 'data'; |
|
971
|
|
|
this.data.chunkSize = chunk.chunkSize; |
|
972
|
|
|
if (samples) { |
|
973
|
|
|
this.data.samples = buffer.slice( |
|
974
|
|
|
chunk.chunkData.start, |
|
975
|
|
|
chunk.chunkData.end); |
|
976
|
|
|
} |
|
977
|
|
|
} else { |
|
978
|
|
|
throw Error('Could not find the "data" chunk'); |
|
979
|
|
|
} |
|
980
|
|
|
} |
|
981
|
|
|
|
|
982
|
|
|
/** |
|
983
|
|
|
* Read the 'bext' chunk of a wav file. |
|
984
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
985
|
|
|
* @param {!Object} signature The file signature. |
|
986
|
|
|
* @private |
|
987
|
|
|
*/ |
|
988
|
|
|
readBextChunk_(buffer, signature) { |
|
989
|
|
|
/** @type {?Object} */ |
|
990
|
|
|
let chunk = this.findChunk_(signature, 'bext'); |
|
991
|
|
|
if (chunk) { |
|
992
|
|
|
this.head_ = chunk.chunkData.start; |
|
993
|
|
|
this.bext.chunkId = chunk.chunkId; |
|
994
|
|
|
this.bext.chunkSize = chunk.chunkSize; |
|
995
|
|
|
this.bext.description = this.readString_(buffer, 256); |
|
996
|
|
|
this.bext.originator = this.readString_(buffer, 32); |
|
997
|
|
|
this.bext.originatorReference = this.readString_(buffer, 32); |
|
998
|
|
|
this.bext.originationDate = this.readString_(buffer, 10); |
|
999
|
|
|
this.bext.originationTime = this.readString_(buffer, 8); |
|
1000
|
|
|
this.bext.timeReference = [ |
|
1001
|
|
|
this.read_(buffer, this.uInt32_), |
|
1002
|
|
|
this.read_(buffer, this.uInt32_)]; |
|
1003
|
|
|
this.bext.version = this.read_(buffer, this.uInt16_); |
|
1004
|
|
|
this.bext.UMID = this.readString_(buffer, 64); |
|
1005
|
|
|
this.bext.loudnessValue = this.read_(buffer, this.uInt16_); |
|
1006
|
|
|
this.bext.loudnessRange = this.read_(buffer, this.uInt16_); |
|
1007
|
|
|
this.bext.maxTruePeakLevel = this.read_(buffer, this.uInt16_); |
|
1008
|
|
|
this.bext.maxMomentaryLoudness = this.read_(buffer, this.uInt16_); |
|
1009
|
|
|
this.bext.maxShortTermLoudness = this.read_(buffer, this.uInt16_); |
|
1010
|
|
|
this.bext.reserved = this.readString_(buffer, 180); |
|
1011
|
|
|
this.bext.codingHistory = this.readString_( |
|
1012
|
|
|
buffer, this.bext.chunkSize - 602); |
|
1013
|
|
|
} |
|
1014
|
|
|
} |
|
1015
|
|
|
|
|
1016
|
|
|
/** |
|
1017
|
|
|
* Read the 'ds64' chunk of a wave file. |
|
1018
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
1019
|
|
|
* @param {!Object} signature The file signature. |
|
1020
|
|
|
* @throws {Error} If no 'ds64' chunk is found and the file is RF64. |
|
1021
|
|
|
* @private |
|
1022
|
|
|
*/ |
|
1023
|
|
|
readDs64Chunk_(buffer, signature) { |
|
1024
|
|
|
/** @type {?Object} */ |
|
1025
|
|
|
let chunk = this.findChunk_(signature, 'ds64'); |
|
1026
|
|
|
if (chunk) { |
|
1027
|
|
|
this.head_ = chunk.chunkData.start; |
|
1028
|
|
|
this.ds64.chunkId = chunk.chunkId; |
|
1029
|
|
|
this.ds64.chunkSize = chunk.chunkSize; |
|
1030
|
|
|
this.ds64.riffSizeHigh = this.read_(buffer, this.uInt32_); |
|
1031
|
|
|
this.ds64.riffSizeLow = this.read_(buffer, this.uInt32_); |
|
1032
|
|
|
this.ds64.dataSizeHigh = this.read_(buffer, this.uInt32_); |
|
1033
|
|
|
this.ds64.dataSizeLow = this.read_(buffer, this.uInt32_); |
|
1034
|
|
|
this.ds64.originationTime = this.read_(buffer, this.uInt32_); |
|
1035
|
|
|
this.ds64.sampleCountHigh = this.read_(buffer, this.uInt32_); |
|
1036
|
|
|
this.ds64.sampleCountLow = this.read_(buffer, this.uInt32_); |
|
1037
|
|
|
//if (this.ds64.chunkSize > 28) { |
|
1038
|
|
|
// this.ds64.tableLength = unpack( |
|
1039
|
|
|
// chunkData.slice(28, 32), this.uInt32_); |
|
1040
|
|
|
// this.ds64.table = chunkData.slice( |
|
1041
|
|
|
// 32, 32 + this.ds64.tableLength); |
|
1042
|
|
|
//} |
|
1043
|
|
|
} else { |
|
1044
|
|
|
if (this.container == 'RF64') { |
|
1045
|
|
|
throw Error('Could not find the "ds64" chunk'); |
|
1046
|
|
|
} |
|
1047
|
|
|
} |
|
1048
|
|
|
} |
|
1049
|
|
|
|
|
1050
|
|
|
/** |
|
1051
|
|
|
* Read the 'LIST' chunks of a wave file. |
|
1052
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
1053
|
|
|
* @param {!Object} signature The file signature. |
|
1054
|
|
|
* @private |
|
1055
|
|
|
*/ |
|
1056
|
|
|
readLISTChunk_(buffer, signature) { |
|
1057
|
|
|
/** @type {?Object} */ |
|
1058
|
|
|
let listChunks = this.findChunk_(signature, 'LIST', true); |
|
1059
|
|
|
if (listChunks === null) { |
|
1060
|
|
|
return; |
|
1061
|
|
|
} |
|
1062
|
|
|
for (let j=0; j < listChunks.length; j++) { |
|
1063
|
|
|
/** @type {!Object} */ |
|
1064
|
|
|
let subChunk = listChunks[j]; |
|
1065
|
|
|
this.LIST.push({ |
|
1066
|
|
|
chunkId: subChunk.chunkId, |
|
1067
|
|
|
chunkSize: subChunk.chunkSize, |
|
1068
|
|
|
format: subChunk.format, |
|
1069
|
|
|
subChunks: []}); |
|
1070
|
|
|
for (let x=0; x<subChunk.subChunks.length; x++) { |
|
1071
|
|
|
this.readLISTSubChunks_(subChunk.subChunks[x], |
|
1072
|
|
|
subChunk.format, buffer); |
|
1073
|
|
|
} |
|
1074
|
|
|
} |
|
1075
|
|
|
} |
|
1076
|
|
|
|
|
1077
|
|
|
/** |
|
1078
|
|
|
* Read the sub chunks of a 'LIST' chunk. |
|
1079
|
|
|
* @param {!Object} subChunk The 'LIST' subchunks. |
|
1080
|
|
|
* @param {string} format The 'LIST' format, 'adtl' or 'INFO'. |
|
1081
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
1082
|
|
|
* @private |
|
1083
|
|
|
*/ |
|
1084
|
|
|
readLISTSubChunks_(subChunk, format, buffer) { |
|
1085
|
|
|
if (format == 'adtl') { |
|
1086
|
|
|
if (['labl', 'note','ltxt'].indexOf(subChunk.chunkId) > -1) { |
|
1087
|
|
|
this.head_ = subChunk.chunkData.start; |
|
1088
|
|
|
/** @type {!Object<string, string|number>} */ |
|
1089
|
|
|
let item = { |
|
1090
|
|
|
chunkId: subChunk.chunkId, |
|
1091
|
|
|
chunkSize: subChunk.chunkSize, |
|
1092
|
|
|
dwName: this.read_(buffer, this.uInt32_) |
|
1093
|
|
|
}; |
|
1094
|
|
|
if (subChunk.chunkId == 'ltxt') { |
|
1095
|
|
|
item.dwSampleLength = this.read_(buffer, this.uInt32_); |
|
1096
|
|
|
item.dwPurposeID = this.read_(buffer, this.uInt32_); |
|
1097
|
|
|
item.dwCountry = this.read_(buffer, this.uInt16_); |
|
1098
|
|
|
item.dwLanguage = this.read_(buffer, this.uInt16_); |
|
1099
|
|
|
item.dwDialect = this.read_(buffer, this.uInt16_); |
|
1100
|
|
|
item.dwCodePage = this.read_(buffer, this.uInt16_); |
|
1101
|
|
|
} |
|
1102
|
|
|
item.value = this.readZSTR_(buffer, this.head_); |
|
1103
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push(item); |
|
1104
|
|
|
} |
|
1105
|
|
|
// RIFF INFO tags like ICRD, ISFT, ICMT |
|
1106
|
|
|
} else if(format == 'INFO') { |
|
1107
|
|
|
this.head_ = subChunk.chunkData.start; |
|
1108
|
|
|
this.LIST[this.LIST.length - 1].subChunks.push({ |
|
1109
|
|
|
chunkId: subChunk.chunkId, |
|
1110
|
|
|
chunkSize: subChunk.chunkSize, |
|
1111
|
|
|
value: this.readZSTR_(buffer, this.head_) |
|
1112
|
|
|
}); |
|
1113
|
|
|
} |
|
1114
|
|
|
} |
|
1115
|
|
|
|
|
1116
|
|
|
/** |
|
1117
|
|
|
* Read the 'junk' chunk of a wave file. |
|
1118
|
|
|
* @param {!Uint8Array} buffer The wav file buffer. |
|
1119
|
|
|
* @param {!Object} signature The file signature. |
|
1120
|
|
|
* @private |
|
1121
|
|
|
*/ |
|
1122
|
|
|
readJunkChunk_(buffer, signature) { |
|
1123
|
|
|
/** @type {?Object} */ |
|
1124
|
|
|
let chunk = this.findChunk_(signature, 'junk'); |
|
1125
|
|
|
if (chunk) { |
|
1126
|
|
|
this.junk = { |
|
1127
|
|
|
chunkId: chunk.chunkId, |
|
1128
|
|
|
chunkSize: chunk.chunkSize, |
|
1129
|
|
|
chunkData: [].slice.call(buffer.slice( |
|
1130
|
|
|
chunk.chunkData.start, |
|
1131
|
|
|
chunk.chunkData.end)) |
|
1132
|
|
|
}; |
|
1133
|
|
|
} |
|
1134
|
|
|
} |
|
1135
|
|
|
|
|
1136
|
|
|
/** |
|
1137
|
|
|
* Read bytes as a ZSTR string. |
|
1138
|
|
|
* @param {!Uint8Array} bytes The bytes. |
|
1139
|
|
|
* @return {string} The string. |
|
1140
|
|
|
* @private |
|
1141
|
|
|
*/ |
|
1142
|
|
|
readZSTR_(bytes, index=0) { |
|
1143
|
|
|
/** @type {string} */ |
|
1144
|
|
|
let str = ''; |
|
1145
|
|
|
for (let i=index; i<bytes.length; i++) { |
|
1146
|
|
|
this.head_++; |
|
1147
|
|
|
if (bytes[i] === 0) { |
|
1148
|
|
|
break; |
|
1149
|
|
|
} |
|
1150
|
|
|
str += unpackString(bytes, i, 1); |
|
1151
|
|
|
} |
|
1152
|
|
|
return str; |
|
1153
|
|
|
} |
|
1154
|
|
|
|
|
1155
|
|
|
/** |
|
1156
|
|
|
* Read bytes as a string from a RIFF chunk. |
|
1157
|
|
|
* @param {!Uint8Array} bytes The bytes. |
|
1158
|
|
|
* @param {number} maxSize the max size of the string. |
|
1159
|
|
|
* @return {string} The string. |
|
1160
|
|
|
* @private |
|
1161
|
|
|
*/ |
|
1162
|
|
|
readString_(bytes, maxSize) { |
|
1163
|
|
|
/** @type {string} */ |
|
1164
|
|
|
let str = ''; |
|
1165
|
|
|
for (let i=0; i<maxSize; i++) { |
|
1166
|
|
|
str += unpackString(bytes, this.head_, 1); |
|
1167
|
|
|
this.head_++; |
|
1168
|
|
|
} |
|
1169
|
|
|
return str; |
|
1170
|
|
|
} |
|
1171
|
|
|
|
|
1172
|
|
|
/** |
|
1173
|
|
|
* Read a number from a chunk. |
|
1174
|
|
|
* @param {!Uint8Array} bytes The chunk bytes. |
|
1175
|
|
|
* @param {!Object} bdType The type definition. |
|
1176
|
|
|
* @return {number} The number. |
|
1177
|
|
|
* @private |
|
1178
|
|
|
*/ |
|
1179
|
|
|
read_(bytes, bdType) { |
|
1180
|
|
|
/** @type {number} */ |
|
1181
|
|
|
let size = bdType.bits / 8; |
|
1182
|
|
|
/** @type {number} */ |
|
1183
|
|
|
let value = unpackFrom(bytes, bdType, this.head_); |
|
1184
|
|
|
this.head_ += size; |
|
1185
|
|
|
return value; |
|
1186
|
|
|
} |
|
1187
|
|
|
|
|
1188
|
|
|
|
|
1189
|
|
|
/** |
|
1190
|
|
|
* Truncate float samples on over and underflow. |
|
1191
|
|
|
* @private |
|
1192
|
|
|
*/ |
|
1193
|
|
|
truncateSamples(samples) { |
|
1194
|
|
|
if (this.fmt.audioFormat === 3) { |
|
1195
|
|
|
/** @type {number} */ |
|
1196
|
|
|
let len = samples.length; |
|
1197
|
|
|
for (let i=0; i<len; i++) { |
|
1198
|
|
|
if (samples[i] > 1) { |
|
1199
|
|
|
samples[i] = 1; |
|
1200
|
|
|
} else if (samples[i] < -1) { |
|
1201
|
|
|
samples[i] = -1; |
|
1202
|
|
|
} |
|
1203
|
|
|
} |
|
1204
|
|
|
} |
|
1205
|
|
|
} |
|
1206
|
|
|
} |
|
1207
|
|
|
|
rochars /
wavefile
