-
Notifications
You must be signed in to change notification settings - Fork 8
/
ws-util.js
221 lines (205 loc) · 8.65 KB
/
ws-util.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
import {TYPE} from './ws-constants.js';
const textEncoder = new TextEncoder();
const textDecoder = new TextDecoder();
const encodedMessageUint8Array = new Uint8Array(32 * 1024);
const encodedMessageDataView = new DataView(encodedMessageUint8Array.buffer, encodedMessageUint8Array.byteOffset);
export const encodeMessage = parts => {
let index = 0;
for (const part of parts) {
if (typeof part === 'number') {
encodedMessageDataView.setUint32(index, part, true);
index += Uint32Array.BYTES_PER_ELEMENT;
} else if (typeof part === 'string') {
const {written} = textEncoder.encodeInto(part, new Uint8Array(encodedMessageUint8Array.buffer, encodedMessageUint8Array.byteOffset + index + Uint32Array.BYTES_PER_ELEMENT));
encodedMessageDataView.setUint32(index, written, true);
index += Uint32Array.BYTES_PER_ELEMENT;
index += written;
} else if (part.byteLength >= 0) {
if (!part.staticSize) {
encodedMessageDataView.setUint32(index, part.byteLength, true);
index += Uint32Array.BYTES_PER_ELEMENT;
}
encodedMessageUint8Array.set(new Uint8Array(part.buffer, part.byteOffset, part.byteLength), index);
index += part.byteLength;
} else {
throw new Error('unknown part: ' + JSON.stringify(part));
}
}
return new Uint8Array(encodedMessageUint8Array.buffer, encodedMessageUint8Array.byteOffset, index);
};
export const encodeAudioMessage = (method, id, type, timestamp, data) => {
let index = 0;
encodedMessageDataView.setUint32(index, method, true);
index += Uint32Array.BYTES_PER_ELEMENT;
encodedMessageDataView.setUint32(index, id, true);
index += Uint32Array.BYTES_PER_ELEMENT;
encodedMessageDataView.setUint32(index, type === 'key' ? 0 : 1, true);
index += Uint32Array.BYTES_PER_ELEMENT;
encodedMessageDataView.setFloat32(index, timestamp, true);
index += Float32Array.BYTES_PER_ELEMENT;
encodedMessageDataView.setUint32(index, data.byteLength, true);
index += Uint32Array.BYTES_PER_ELEMENT;
encodedMessageUint8Array.set(data, index);
index += data.byteLength;
return new Uint8Array(encodedMessageUint8Array.buffer, encodedMessageUint8Array.byteOffset, index);
};
export const encodePoseMessage = (method, id, p, q, s, extraUint8ArrayFull, extraUint8ArrayByteLength) => {
let index = 0;
encodedMessageDataView.setUint32(index, method, true);
index += Uint32Array.BYTES_PER_ELEMENT;
encodedMessageDataView.setUint32(index, id, true);
index += Uint32Array.BYTES_PER_ELEMENT;
encodedMessageUint8Array.set(new Uint8Array(p.buffer, p.byteOffset, p.byteLength), index);
index += p.byteLength;
encodedMessageUint8Array.set(new Uint8Array(q.buffer, q.byteOffset, q.byteLength), index);
index += q.byteLength;
encodedMessageUint8Array.set(new Uint8Array(s.buffer, s.byteOffset, s.byteLength), index);
index += s.byteLength;
encodedMessageUint8Array.set(new Uint8Array(extraUint8ArrayFull.buffer, extraUint8ArrayFull.byteOffset, extraUint8ArrayByteLength), index);
index += extraUint8ArrayByteLength;
return new Uint8Array(encodedMessageUint8Array.buffer, encodedMessageUint8Array.byteOffset, index);
};
const _align = (index, n) => index + (n - (index % n));
const _align4 = index => _align(index, 4);
export const encodeTypedMessage = (uint8Array, parts) => {
const dataView = new DataView(uint8Array.buffer, uint8Array.byteOffset);
let index = 0;
for (const part of parts) {
if (typeof part === 'number') {
if (Number.isInteger(part)) {
dataView.setUint32(index, TYPE.INT, true);
index += Uint32Array.BYTES_PER_ELEMENT;
dataView.setUint32(index, part, true)
index += Uint32Array.BYTES_PER_ELEMENT;
} else {
dataView.setUint32(index, TYPE.FLOAT, true);
index += Uint32Array.BYTES_PER_ELEMENT;
dataView.setFloat32(index, part, true);
index += Float32Array.BYTES_PER_ELEMENT;
}
} else if (typeof part === 'string') {
dataView.setUint32(index, TYPE.STRING, true);
index += Uint32Array.BYTES_PER_ELEMENT;
const {written} = textEncoder.encodeInto(part, new Uint8Array(uint8Array.buffer, uint8Array.byteOffset + index + Uint32Array.BYTES_PER_ELEMENT));
dataView.setUint32(index, written, true);
index += Uint32Array.BYTES_PER_ELEMENT;
index += written;
index = _align4(index);
} else if (part instanceof Uint32Array) {
dataView.setUint32(index, TYPE.UINT32ARRAY, true);
index += Uint32Array.BYTES_PER_ELEMENT;
dataView.setUint32(index, part.length, true);
index += Uint32Array.BYTES_PER_ELEMENT;
uint8Array.set(new Uint8Array(part.buffer, part.byteOffset, part.byteLength), index);
index += part.byteLength;
} else if (part instanceof Float32Array) {
dataView.setUint32(index, TYPE.FLOAT32ARRAY, true);
index += Uint32Array.BYTES_PER_ELEMENT;
dataView.setUint32(index, part.length, true);
index += Uint32Array.BYTES_PER_ELEMENT;
uint8Array.set(new Uint8Array(part.buffer, part.byteOffset, part.byteLength), index);
index += part.byteLength;
} else if (part instanceof Uint8Array) {
dataView.setUint32(index, TYPE.UINT32ARRAY, true);
index += Uint32Array.BYTES_PER_ELEMENT;
dataView.setUint32(index, part.length, true);
index += Uint32Array.BYTES_PER_ELEMENT;
uint8Array.set(part, index);
index += part.byteLength;
index = _align4(index);
} else {
throw new Error('unknown part: ' + JSON.stringify(part));
}
}
return index;
};
export const decodeTypedMessage = (uint8Array, uint8ArrayByteLength, parts) => {
const dataView = new DataView(uint8Array.buffer, uint8Array.byteOffset);
parts.length = 0;
for (let index = 0; index < uint8ArrayByteLength;) {
const type = dataView.getUint32(index, true);
index += Uint32Array.BYTES_PER_ELEMENT;
switch (type) {
case TYPE.INT: {
const part = dataView.getUint32(index, true);
parts.push(part);
index += Uint32Array.BYTES_PER_ELEMENT;
break;
}
case TYPE.FLOAT: {
const part = dataView.getFloat32(index, true);
parts.push(part);
index += Float32Array.BYTES_PER_ELEMENT;
break;
}
case TYPE.STRING: {
const byteLength = dataView.getUint32(index, true);
index += Uint32Array.BYTES_PER_ELEMENT;
const part = textDecoder.decode(new Uint8Array(uint8Array.buffer, index, byteLength));
parts.push(part);
index += byteLength;
index = _align4(index);
break;
}
case TYPE.UINT32ARRAY: {
const length = dataView.getUint32(index, true);
index += Uint32Array.BYTES_PER_ELEMENT;
const part = new Uint32Array(uint8Array.buffer, index, length);
parts.push(part);
index += part.byteLength;
break;
}
case TYPE.FLOAT32ARRAY: {
const length = dataView.getUint32(index, true);
index += Uint32Array.BYTES_PER_ELEMENT;
const part = new Float32Array(uint8Array.buffer, index, length);
parts.push(part);
index += part.byteLength;
break;
}
case TYPE.UINT8ARRAY: {
const length = dataView.getUint32(index, true);
index += Uint32Array.BYTES_PER_ELEMENT;
const part = new Uint8Array(uint8Array.buffer, index, length);
parts.push(part);
index += part.byteLength;
index = _align4(index);
break;
}
default: {
throw new Error('cannot parse message part with type ' + type);
break;
}
}
}
};
export const getAudioDataBuffer = audioData => {
let channelData;
if (audioData.copyTo) { // new api
channelData = new Float32Array(audioData.numberOfFrames);
audioData.copyTo(channelData, {
planeIndex: 0,
frameCount: audioData.numberOfFrames,
});
} else { // old api
channelData = audioData.buffer.getChannelData(0);
}
return channelData;
};
export const getEncodedAudioChunkBuffer = encodedAudioChunk => {
if (encodedAudioChunk.copyTo) { // new api
const data = new Uint8Array(encodedAudioChunk.byteLength);
encodedAudioChunk.copyTo(data);
return data;
} else { // old api
return new Uint8Array(encodedAudioChunk.data);
}
};
/* // hack to fix toJSON()
export const loadState = state => {
const objects = state.getArray('objects');
for (let i = 0; i < objects.length; i++) {
const objectId = objects.get(i);
const object = state.getMap('objects.' + objectId);
}
}; */