forked from anomalyco/opencode
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathspeech.ts
More file actions
326 lines (292 loc) · 8.66 KB
/
speech.ts
File metadata and controls
326 lines (292 loc) · 8.66 KB
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
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
import { onCleanup } from "solid-js"
import { createStore } from "solid-js/store"
import { getSpeechRecognitionCtor } from "@/utils/runtime-adapters"
// Minimal types to avoid relying on non-standard DOM typings
type RecognitionResult = {
0: { transcript: string }
isFinal: boolean
}
type RecognitionEvent = {
results: RecognitionResult[]
resultIndex: number
}
interface Recognition {
continuous: boolean
interimResults: boolean
lang: string
start: () => void
stop: () => void
onresult: ((e: RecognitionEvent) => void) | null
onerror: ((e: { error: string }) => void) | null
onend: (() => void) | null
onstart: (() => void) | null
}
const COMMIT_DELAY = 250
const appendSegment = (base: string, addition: string) => {
const trimmed = addition.trim()
if (!trimmed) return base
if (!base) return trimmed
const needsSpace = /\S$/.test(base) && !/^[,.;!?]/.test(trimmed)
return `${base}${needsSpace ? " " : ""}${trimmed}`
}
const extractSuffix = (committed: string, hypothesis: string) => {
const cleanHypothesis = hypothesis.trim()
if (!cleanHypothesis) return ""
const baseTokens = committed.trim() ? committed.trim().split(/\s+/) : []
const hypothesisTokens = cleanHypothesis.split(/\s+/)
let index = 0
while (
index < baseTokens.length &&
index < hypothesisTokens.length &&
baseTokens[index] === hypothesisTokens[index]
) {
index += 1
}
if (index < baseTokens.length) return ""
return hypothesisTokens.slice(index).join(" ")
}
export function createSpeechRecognition(opts?: {
lang?: string
onFinal?: (text: string) => void
onInterim?: (text: string) => void
}) {
const ctor = getSpeechRecognitionCtor<Recognition>(typeof window === "undefined" ? undefined : window)
const hasSupport = Boolean(ctor)
const [store, setStore] = createStore({
isRecording: false,
committed: "",
interim: "",
})
const isRecording = () => store.isRecording
const committed = () => store.committed
const interim = () => store.interim
let recognition: Recognition | undefined
let shouldContinue = false
let committedText = ""
let sessionCommitted = ""
let pendingHypothesis = ""
let lastInterimSuffix = ""
let shrinkCandidate: string | undefined
let commitTimer: number | undefined
let restartTimer: number | undefined
const cancelPendingCommit = () => {
if (commitTimer === undefined) return
clearTimeout(commitTimer)
commitTimer = undefined
}
const clearRestart = () => {
if (restartTimer === undefined) return
window.clearTimeout(restartTimer)
restartTimer = undefined
}
const scheduleRestart = () => {
clearRestart()
if (!shouldContinue) return
if (!recognition) return
restartTimer = window.setTimeout(() => {
restartTimer = undefined
if (!shouldContinue) return
if (!recognition) return
try {
recognition.start()
} catch {}
}, 150)
}
const commitSegment = (segment: string) => {
const nextCommitted = appendSegment(committedText, segment)
if (nextCommitted === committedText) return
committedText = nextCommitted
setStore("committed", committedText)
if (opts?.onFinal) opts.onFinal(segment.trim())
}
const promotePending = () => {
if (!pendingHypothesis) return
const suffix = extractSuffix(sessionCommitted, pendingHypothesis)
if (!suffix) {
pendingHypothesis = ""
return
}
sessionCommitted = appendSegment(sessionCommitted, suffix)
commitSegment(suffix)
pendingHypothesis = ""
lastInterimSuffix = ""
shrinkCandidate = undefined
setStore("interim", "")
if (opts?.onInterim) opts.onInterim("")
}
const applyInterim = (suffix: string, hypothesis: string) => {
cancelPendingCommit()
pendingHypothesis = hypothesis
lastInterimSuffix = suffix
shrinkCandidate = undefined
setStore("interim", suffix)
if (opts?.onInterim) {
opts.onInterim(suffix ? appendSegment(committedText, suffix) : "")
}
if (!suffix) return
const snapshot = hypothesis
commitTimer = window.setTimeout(() => {
if (pendingHypothesis !== snapshot) return
const currentSuffix = extractSuffix(sessionCommitted, pendingHypothesis)
if (!currentSuffix) return
sessionCommitted = appendSegment(sessionCommitted, currentSuffix)
commitSegment(currentSuffix)
pendingHypothesis = ""
lastInterimSuffix = ""
shrinkCandidate = undefined
setStore("interim", "")
if (opts?.onInterim) opts.onInterim("")
}, COMMIT_DELAY)
}
if (ctor) {
recognition = new ctor()
recognition.continuous = false
recognition.interimResults = true
recognition.lang = opts?.lang || (typeof navigator !== "undefined" ? navigator.language : "en-US")
recognition.onresult = (event: RecognitionEvent) => {
if (!event.results.length) return
let aggregatedFinal = ""
let latestHypothesis = ""
for (let i = 0; i < event.results.length; i += 1) {
const result = event.results[i]
const transcript = (result[0]?.transcript || "").trim()
if (!transcript) continue
if (result.isFinal) {
aggregatedFinal = appendSegment(aggregatedFinal, transcript)
} else {
latestHypothesis = transcript
}
}
if (aggregatedFinal) {
cancelPendingCommit()
const finalSuffix = extractSuffix(sessionCommitted, aggregatedFinal)
if (finalSuffix) {
sessionCommitted = appendSegment(sessionCommitted, finalSuffix)
commitSegment(finalSuffix)
}
pendingHypothesis = ""
lastInterimSuffix = ""
shrinkCandidate = undefined
setStore("interim", "")
if (opts?.onInterim) opts.onInterim("")
return
}
cancelPendingCommit()
if (!latestHypothesis) {
shrinkCandidate = undefined
applyInterim("", "")
return
}
const suffix = extractSuffix(sessionCommitted, latestHypothesis)
if (!suffix) {
if (!lastInterimSuffix) {
shrinkCandidate = undefined
applyInterim("", latestHypothesis)
return
}
if (shrinkCandidate === "") {
applyInterim("", latestHypothesis)
return
}
shrinkCandidate = ""
pendingHypothesis = latestHypothesis
return
}
if (lastInterimSuffix && suffix.length < lastInterimSuffix.length) {
if (shrinkCandidate === suffix) {
applyInterim(suffix, latestHypothesis)
return
}
shrinkCandidate = suffix
pendingHypothesis = latestHypothesis
return
}
shrinkCandidate = undefined
applyInterim(suffix, latestHypothesis)
}
recognition.onerror = (e: { error: string }) => {
clearRestart()
cancelPendingCommit()
lastInterimSuffix = ""
shrinkCandidate = undefined
if (e.error === "no-speech" && shouldContinue) {
setStore("interim", "")
if (opts?.onInterim) opts.onInterim("")
scheduleRestart()
return
}
shouldContinue = false
setStore("isRecording", false)
}
recognition.onstart = () => {
clearRestart()
sessionCommitted = ""
pendingHypothesis = ""
cancelPendingCommit()
lastInterimSuffix = ""
shrinkCandidate = undefined
setStore("interim", "")
if (opts?.onInterim) opts.onInterim("")
setStore("isRecording", true)
}
recognition.onend = () => {
clearRestart()
cancelPendingCommit()
lastInterimSuffix = ""
shrinkCandidate = undefined
setStore("isRecording", false)
if (shouldContinue) {
scheduleRestart()
}
}
}
const start = () => {
if (!recognition) return
clearRestart()
shouldContinue = true
sessionCommitted = ""
pendingHypothesis = ""
cancelPendingCommit()
lastInterimSuffix = ""
shrinkCandidate = undefined
setStore("interim", "")
try {
recognition.start()
} catch {}
}
const stop = () => {
if (!recognition) return
shouldContinue = false
clearRestart()
promotePending()
cancelPendingCommit()
lastInterimSuffix = ""
shrinkCandidate = undefined
setStore("interim", "")
if (opts?.onInterim) opts.onInterim("")
try {
recognition.stop()
} catch {}
}
onCleanup(() => {
shouldContinue = false
clearRestart()
promotePending()
cancelPendingCommit()
lastInterimSuffix = ""
shrinkCandidate = undefined
setStore("interim", "")
if (opts?.onInterim) opts.onInterim("")
try {
recognition?.stop()
} catch {}
})
return {
isSupported: () => hasSupport,
isRecording,
committed,
interim,
start,
stop,
}
}