d3ro-voice/apps/desktop/src/main/services/AudioCaptureService.ts
윤찬 dd591d06e7 fix(desktop): AudioCaptureService.getDevices Mac 분기 — system_profiler CoreAudio 열거 (U7, 빅뱅 Phase 5 Part 6)
getDevices()가 powershell -NoProfile을 플랫폼 불문 호출해 Mac에서
"Failed to enumerate audio devices via PowerShell" 경고 + 1 device fallback이
발생하던 문제. process.platform 분기로 _getDevicesWindows / _getDevicesMac
helper로 분리하고, Mac은 system_profiler SPAudioDataType -json 을 파싱해
coreaudio_device_input > 0 인 항목만 input 디바이스로 추출.

macOS SoX 빌드는 실제 캡처 경로에서 -d(default) 고정이므로 deviceId는
'default'로 통일하고 label만 사용자 구분용으로 노출한다. Linux는 default
1개만 반환(pulseaudio/alsa 열거는 sox -d 로 충분).

Electron 재기동 후 로그: "Found 2 audio device(s) on darwin" 확인.
V2-5 플랫폼 감사 누락 항목 해소.
2026-04-11 23:18:18 +09:00

539 lines
17 KiB
TypeScript

// src/main/services/AudioCaptureService.ts
// 마이크 PCM 캡처 서비스. 설계서 01의 IAudioCaptureService 구현.
// Windows: SoX 직접 spawn (-t waveaudio). 기타: node-record-lpcm16.
import { EventEmitter } from 'events'
import path from 'path'
import { existsSync } from 'fs'
import { spawn, type ChildProcess } from 'child_process'
import type { Readable } from 'stream'
import { getLogger } from './LoggerService'
import { configGet } from './ConfigService'
import { getSoxPath } from '../utils/paths'
import type { AudioDevice } from '@d3ro/core/types'
import { AUDIO_FORMAT, TIMING } from '@d3ro/core/constants'
import { D3ROError, ErrorCode } from '@d3ro/core/errors'
const logger = getLogger('AudioCaptureService')
/** 60ms 프레임 크기 (바이트): 16000 * 2 * 0.06 = 1920 */
const FRAME_SIZE_BYTES = (AUDIO_FORMAT.SAMPLE_RATE * AUDIO_FORMAT.BYTES_PER_SAMPLE * 60) / 1000
export type CaptureState = 'idle' | 'starting' | 'capturing' | 'stopping' | 'error'
interface AudioCaptureEvents {
'audio-data': (payload: { buffer: Buffer; timestamp: number }) => void
'audio-level': (payload: { level: number; timestamp: number }) => void
'device-changed': (payload: {
previous: AudioDevice | null
current: AudioDevice
}) => void
started: (payload: { deviceId: string }) => void
stopped: (payload: { reason: 'manual' | 'device-lost' | 'error' }) => void
error: (payload: { error: D3ROError }) => void
}
/**
* PCM16 버퍼에서 RMS(Root Mean Square) 오디오 레벨을 계산한다.
* 반환값은 0.0 ~ 1.0 범위로 정규화된다.
*/
export function calculateRMS(buffer: Buffer): number {
const samples = buffer.length / AUDIO_FORMAT.BYTES_PER_SAMPLE
if (samples === 0) return 0
let sumSquares = 0
for (let i = 0; i < buffer.length; i += AUDIO_FORMAT.BYTES_PER_SAMPLE) {
const sample = buffer.readInt16LE(i)
sumSquares += sample * sample
}
const rms = Math.sqrt(sumSquares / samples)
// PCM16 최대값 32768로 나눠서 0.0~1.0 범위로 정규화
return Math.min(1.0, rms / 32768)
}
class AudioCaptureService extends EventEmitter {
private _state: CaptureState = 'idle'
private _currentDevice: AudioDevice | null = null
private _refCount = 0
private _cachedDevices: AudioDevice[] | null = null
private _soxProcess: ChildProcess | null = null
private _stream: Readable | null = null
private _levelInterval: ReturnType<typeof setInterval> | null = null
/** 프레임 조립용 잔여 바이트 버퍼 */
private _residualBuffer: Buffer = Buffer.alloc(0)
/** RMS 계산용 누적 버퍼 (100ms 간격 emit) */
private _levelAccumulator: Buffer[] = []
get state(): CaptureState {
return this._state
}
get currentDevice(): AudioDevice | null {
return this._currentDevice
}
async start(deviceId?: string): Promise<void> {
if (this._state === 'capturing') {
this._refCount++
logger.debug(`Reference count increased to ${this._refCount}`)
return
}
if (this._state !== 'idle' && this._state !== 'error') {
logger.warn(`Cannot start capture in state: ${this._state}`)
return
}
this._state = 'starting'
const selectedDeviceId = deviceId ?? configGet('selectedDeviceId')
try {
logger.info(
`Starting audio capture (device: ${selectedDeviceId ?? 'default'}, ` +
`format: ${AUDIO_FORMAT.SAMPLE_RATE}Hz ${AUDIO_FORMAT.CHANNELS}ch ${AUDIO_FORMAT.BIT_DEPTH}bit)`
)
// SoX 직접 spawn (Windows: -t waveaudio 필수)
const soxExe = getSoxPath()
logger.info(`Using SoX: ${soxExe}`)
if (!existsSync(soxExe) && soxExe !== 'sox') {
throw new D3ROError(
ErrorCode.AudioCaptureStartFailed,
`SoX 실행 파일을 찾을 수 없습니다: ${soxExe}`
)
}
const deviceArg = selectedDeviceId && selectedDeviceId !== 'default'
? selectedDeviceId
: 'default'
// Windows: sox -t waveaudio <device> --no-show-progress -r 16000 -c 1 -b 16 -e signed-integer -t raw -
// Linux/Mac: sox -d --no-show-progress ...
const soxArgs = process.platform === 'win32'
? [
'-t', 'waveaudio', deviceArg,
'--no-show-progress',
'-r', String(AUDIO_FORMAT.SAMPLE_RATE),
'-c', String(AUDIO_FORMAT.CHANNELS),
'-b', '16',
'-e', 'signed-integer',
'-t', 'raw',
'-',
]
: [
'-d',
'--no-show-progress',
'-r', String(AUDIO_FORMAT.SAMPLE_RATE),
'-c', String(AUDIO_FORMAT.CHANNELS),
'-b', '16',
'-e', 'signed-integer',
'-t', 'raw',
'-',
]
logger.info(`SoX args: ${soxArgs.join(' ')}`)
this._soxProcess = spawn(soxExe, soxArgs, { stdio: ['pipe', 'pipe', 'pipe'] })
this._stream = this._soxProcess.stdout
this._residualBuffer = Buffer.alloc(0)
this._levelAccumulator = []
if (!this._stream) {
throw new D3ROError(ErrorCode.AudioCaptureStartFailed, 'SoX stdout stream is null')
}
// 스트림 데이터 수신: 60ms 프레임 단위로 잘라 emit
this._stream.on('data', (chunk: Buffer) => {
this._onAudioChunk(chunk)
})
// SoX stderr → 로그
this._soxProcess.stderr?.on('data', (chunk: Buffer) => {
const msg = chunk.toString().trim()
if (msg) logger.warn(`SoX stderr: ${msg}`)
})
// SoX 프로세스 종료 감지
this._soxProcess.on('close', (code) => {
if (this._state === 'capturing') {
logger.warn(`SoX process exited unexpectedly (code: ${code})`)
this._handleError(
new D3ROError(ErrorCode.AudioCaptureFailed, `SoX process exited with code ${code}`),
'device-lost'
)
}
})
this._soxProcess.on('error', (err: Error) => {
logger.error(`SoX process spawn error: ${err.message}`)
this._handleError(
new D3ROError(ErrorCode.AudioCaptureStartFailed, `SoX 프로세스 시작 실패: ${err.message}`),
'error'
)
})
this._currentDevice = {
deviceId: selectedDeviceId ?? 'default',
label: 'Default Microphone',
isDefault: !selectedDeviceId || selectedDeviceId === 'default'
}
this._state = 'capturing'
this._refCount = 1
// 100ms 간격으로 audio-level 이벤트 emit
this._levelInterval = setInterval(() => {
this._emitAudioLevel()
}, TIMING.AUDIO_LEVEL_INTERVAL)
this.emit('started', { deviceId: this._currentDevice.deviceId })
logger.info('Audio capture started')
} catch (error) {
this._state = 'error'
const d3roError = new D3ROError(
ErrorCode.AudioCaptureStartFailed,
`Failed to start audio capture: ${error instanceof Error ? error.message : String(error)}`
)
this.emit('error', { error: d3roError })
throw d3roError
}
}
async stop(): Promise<void> {
if (this._state !== 'capturing') {
return
}
this._refCount--
if (this._refCount > 0) {
logger.debug(`Reference count decreased to ${this._refCount}`)
return
}
this._state = 'stopping'
this._cleanup()
this._state = 'idle'
this._currentDevice = null
this.emit('stopped', { reason: 'manual' })
logger.info('Audio capture stopped')
}
async getDevices(): Promise<AudioDevice[]> {
// 캐싱: 네이티브 프로세스 호출이 느리므로 한번만 실행
if (this._cachedDevices) return this._cachedDevices
const devices: AudioDevice[] = [
{ deviceId: 'default', label: '시스템 기본 마이크', isDefault: true },
]
try {
if (process.platform === 'win32') {
devices.push(...(await this._getDevicesWindows()))
} else if (process.platform === 'darwin') {
devices.push(...(await this._getDevicesMac()))
}
// linux: default 1개만 (pulseaudio/alsa 열거는 sox fallback -d 로 충분)
} catch (err) {
logger.warn(
`Failed to enumerate audio devices: ${err instanceof Error ? err.message : String(err)}`,
)
}
this._cachedDevices = devices
logger.debug(`Found ${devices.length} audio device(s) on ${process.platform}`)
return devices
}
/**
* Windows: PowerShell로 AudioEndpoint 열거.
* SoX -t waveaudio는 이름으로 매칭하므로 FriendlyName을 deviceId로 사용.
*/
private async _getDevicesWindows(): Promise<AudioDevice[]> {
const { execSync } = await import('child_process')
const psCommand = `[Console]::OutputEncoding = [Text.Encoding]::UTF8; Get-PnpDevice -Class AudioEndpoint -Status OK | Select-Object InstanceId, FriendlyName | ConvertTo-Json -Compress`
const output = execSync(`powershell -NoProfile -Command "${psCommand}"`, {
encoding: 'utf8',
timeout: 5000,
env: { ...process.env, PYTHONIOENCODING: 'utf-8' },
}).trim()
if (!output) return []
const parsed: unknown = JSON.parse(output.startsWith('[') ? output : `[${output}]`)
if (!Array.isArray(parsed)) return []
const result: AudioDevice[] = []
for (const dev of parsed) {
const d = dev as { InstanceId?: string; FriendlyName?: string }
if (d.InstanceId && d.FriendlyName) {
result.push({
deviceId: d.FriendlyName,
label: d.FriendlyName,
isDefault: false,
})
}
}
return result
}
/**
* macOS: system_profiler SPAudioDataType -json 으로 CoreAudio 디바이스 열거.
* input 전용 디바이스만 필터 (coreaudio_device_input > 0).
* macOS SoX 빌드는 실제 디바이스 선택에 -d(default)만 지원하는 경우가 대부분이므로
* label은 UI 표시 용도, deviceId는 'default'로 통일해 실제 캡처 경로를 단순화한다.
*/
private async _getDevicesMac(): Promise<AudioDevice[]> {
const { execFile } = await import('child_process')
const output: string = await new Promise((resolve, reject) => {
execFile(
'/usr/sbin/system_profiler',
['SPAudioDataType', '-json'],
{ encoding: 'utf8', timeout: 5000, maxBuffer: 1024 * 1024 },
(err, stdout) => {
if (err) reject(err)
else resolve(stdout)
},
)
})
if (!output) return []
interface MacAudioItem {
_name?: string
coreaudio_device_input?: number
coreaudio_default_audio_input_device?: string
coreaudio_input_source?: string
}
interface MacAudioGroup {
_items?: MacAudioItem[]
}
interface MacAudioJson {
SPAudioDataType?: MacAudioGroup[]
}
const parsed = JSON.parse(output) as MacAudioJson
const groups = parsed.SPAudioDataType ?? []
const result: AudioDevice[] = []
for (const group of groups) {
const items = group._items ?? []
for (const item of items) {
const hasInput =
typeof item.coreaudio_device_input === 'number' && item.coreaudio_device_input > 0
const name = item._name ?? item.coreaudio_input_source
if (!hasInput || !name) continue
// 중복 방지 (name 기준)
if (result.some((d) => d.label === name)) continue
result.push({
// macOS SoX record 경로는 -d(default) 고정이므로 선택 시 default로 매핑.
// 라벨만 사용자 구분용으로 노출.
deviceId: 'default',
label: name,
isDefault: item.coreaudio_default_audio_input_device === 'spaudio_yes',
})
}
}
return result
}
getCurrentDevice(): AudioDevice | null {
return this._currentDevice
}
dispose(): void {
this._cleanup()
this._state = 'idle'
this._currentDevice = null
this._refCount = 0
this.removeAllListeners()
logger.info('AudioCaptureService disposed')
}
/**
* 지정 시간(ms) 동안 마이크 캡처 후 평균/피크 레벨을 반환한다.
*/
async testCapture(durationMs: number): Promise<{ averageLevel: number; peakLevel: number; hasAudio: boolean }> {
const soxExe = getSoxPath()
const selectedDeviceId = configGet('selectedDeviceId')
const deviceArg = selectedDeviceId && selectedDeviceId !== 'default'
? selectedDeviceId
: 'default'
const soxArgs = process.platform === 'win32'
? ['-t', 'waveaudio', deviceArg, '--no-show-progress',
'-r', String(AUDIO_FORMAT.SAMPLE_RATE), '-c', String(AUDIO_FORMAT.CHANNELS),
'-b', '16', '-e', 'signed-integer', '-t', 'raw', '-']
: ['-d', '--no-show-progress',
'-r', String(AUDIO_FORMAT.SAMPLE_RATE), '-c', String(AUDIO_FORMAT.CHANNELS),
'-b', '16', '-e', 'signed-integer', '-t', 'raw', '-']
return new Promise((resolve, reject) => {
const proc = spawn(soxExe, soxArgs, { stdio: ['ignore', 'pipe', 'pipe'] })
const buffers: Buffer[] = []
let peakRms = 0
proc.stdout?.on('data', (chunk: Buffer) => {
buffers.push(chunk)
const rms = calculateRMS(chunk)
if (rms > peakRms) peakRms = rms
})
proc.on('error', (err) => {
reject(new D3ROError(ErrorCode.AudioCaptureStartFailed, `SoX 실행 실패: ${err.message}`))
})
setTimeout(() => {
proc.kill()
}, durationMs)
proc.on('close', () => {
if (buffers.length === 0) {
resolve({ averageLevel: 0, peakLevel: 0, hasAudio: false })
return
}
const combined = Buffer.concat(buffers)
const avgRms = calculateRMS(combined)
const avgLevel = avgRms > 0 ? Math.min(1.0, Math.pow(avgRms, 0.28)) : 0
const peakLevel = peakRms > 0 ? Math.min(1.0, Math.pow(peakRms, 0.28)) : 0
resolve({
averageLevel: avgLevel,
peakLevel: peakLevel,
hasAudio: avgRms > 0.001,
})
})
})
}
/**
* 수신된 오디오 청크를 60ms 프레임(1920 bytes) 단위로 분할하여 emit한다.
* 잔여 바이트는 다음 청크와 결합한다.
*/
private _onAudioChunk(chunk: Buffer): void {
// 잔여 버퍼와 새 청크를 결합
const combined = this._residualBuffer.length > 0
? Buffer.concat([this._residualBuffer, chunk])
: chunk
let offset = 0
// 60ms 프레임 단위로 분할하여 emit
while (offset + FRAME_SIZE_BYTES <= combined.length) {
const frame = combined.subarray(offset, offset + FRAME_SIZE_BYTES)
offset += FRAME_SIZE_BYTES
this.emit('audio-data', {
buffer: Buffer.from(frame), // 방어적 복사
timestamp: Date.now()
})
// RMS 계산용 누적
this._levelAccumulator.push(frame)
}
// 남은 바이트는 잔여 버퍼에 보관
if (offset < combined.length) {
this._residualBuffer = Buffer.from(combined.subarray(offset))
} else {
this._residualBuffer = Buffer.alloc(0)
}
}
/**
* 100ms 간격으로 누적된 오디오 데이터의 RMS 레벨을 계산하여 emit한다.
*/
private _emitAudioLevel(): void {
if (this._levelAccumulator.length === 0) {
this.emit('audio-level', { level: 0, timestamp: Date.now() })
return
}
// 누적된 프레임들을 하나로 합쳐서 RMS 계산
const combined = Buffer.concat(this._levelAccumulator)
this._levelAccumulator = []
const rawLevel = calculateRMS(combined)
// 로그 스케일: 작은 소리도 크게, 큰 소리는 압축 (DAW 미터 방식)
// pow(x, 0.28) → 0.001→0.04, 0.01→0.14, 0.05→0.35, 0.1→0.52, 0.3→0.80
const level = rawLevel > 0 ? Math.min(1.0, Math.pow(rawLevel, 0.28)) : 0
this.emit('audio-level', { level, timestamp: Date.now() })
}
/**
* 에러 발생 시 리소스 정리 + 에러 이벤트 emit.
*/
private _handleError(error: D3ROError, stopReason: 'device-lost' | 'error'): void {
if (this._state === 'idle' || this._state === 'stopping') {
return
}
this._cleanup()
this._state = 'error'
this._currentDevice = null
this.emit('error', { error })
this.emit('stopped', { reason: stopReason })
}
/**
* 녹음 프로세스와 타이머를 정리한다.
*/
private _cleanup(): void {
if (this._levelInterval) {
clearInterval(this._levelInterval)
this._levelInterval = null
}
if (this._stream) {
this._stream.removeAllListeners()
this._stream = null
}
if (this._soxProcess) {
try {
this._soxProcess.kill()
} catch {
// 이미 종료된 프로세스 kill 시 에러 무시
}
this._soxProcess = null
}
this._residualBuffer = Buffer.alloc(0)
this._levelAccumulator = []
}
// EventEmitter 타입 오버라이드
override on<K extends keyof AudioCaptureEvents>(
event: K,
listener: AudioCaptureEvents[K]
): this {
return super.on(event, listener)
}
override off<K extends keyof AudioCaptureEvents>(
event: K,
listener: AudioCaptureEvents[K]
): this {
return super.off(event, listener)
}
override emit<K extends keyof AudioCaptureEvents>(
event: K,
...args: Parameters<AudioCaptureEvents[K]>
): boolean {
return super.emit(event, ...args)
}
}
// 싱글톤
let instance: AudioCaptureService | null = null
export function getAudioCaptureService(): AudioCaptureService {
if (!instance) {
instance = new AudioCaptureService()
}
return instance
}