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refactor(live-atc): extract encodeWav to shared/utils, add tests

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Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
itsrubberduck
2026-07-10 09:10:29 +02:00
parent 10e084c35b
commit 25911e03d7
3 changed files with 65 additions and 29 deletions
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30
app/pages/live-atc.vue
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@@ -1525,6 +1525,7 @@ import { createNoiseGenerators, getReadabilityProfile } from '../../shared/utils
import { createAtisAudioLoop, type AtisAudioLoop } from '../../shared/utils/atisAudioLoop'
import { normalizeManualFreq } from '../../shared/utils/frequency'
import { normalizeSimFreq, normalizeBridgeTelemetry, telemetrySignature } from '../../shared/utils/bridgeTelemetry'
import { encodeWav } from '../../shared/utils/wavEncoder'
import type {
CandidateTraceElimination,
CandidateTraceEntry,
@@ -4037,35 +4038,6 @@ const snapshotPrerecPCM = (): Float32Array => {
return out
}
const encodeWav = (pcm: Float32Array, sampleRate: number): Blob => {
const length = pcm.length
const buffer = new ArrayBuffer(44 + length * 2)
const view = new DataView(buffer)
const writeStr = (off: number, s: string) => {
for (let i = 0; i < s.length; i++) view.setUint8(off + i, s.charCodeAt(i))
}
writeStr(0, 'RIFF')
view.setUint32(4, 36 + length * 2, true)
writeStr(8, 'WAVE')
writeStr(12, 'fmt ')
view.setUint32(16, 16, true)
view.setUint16(20, 1, true)
view.setUint16(22, 1, true)
view.setUint32(24, sampleRate, true)
view.setUint32(28, sampleRate * 2, true)
view.setUint16(32, 2, true)
view.setUint16(34, 16, true)
writeStr(36, 'data')
view.setUint32(40, length * 2, true)
let off = 44
for (let i = 0; i < length; i++) {
const s = Math.max(-1, Math.min(1, pcm[i]))
view.setInt16(off, s < 0 ? s * 0x8000 : s * 0x7FFF, true)
off += 2
}
return new Blob([buffer], { type: 'audio/wav' })
}
const stopPrerecCapture = () => {
prerecLiveCapture = false
prerecLiveChunks = []