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Changelog

Major notable changes to DirectPipe (maintained in this repository era, including v3.4.0+) are documented in this file.

[Unreleased]

[4.0.3] - 2026-03-22

Added

  • Startup behavior option (tray launch): Added Start Minimized to Tray toggle to both Settings > Application and tray right-click menu, backed by settings.dppreset persistence so both entry points stay in sync.

Changed

  • Auto-start label (cross-platform UI consistency): Unified tray menu and Settings toggle to use a single platform label source via Platform::getAutoStartLabel() (Open at Login on macOS, Start with System on others), removing Windows-specific hardcoded wording from the Settings toggle path.

Fixed

  • Global Safety Guard runtime (legacy SafetyLimiter naming): Global stage now runs zero-latency sample-peak guard behavior (stereo-linked, instant attack, release smoothing, final hard clamp) with legacy class/API/action names preserved for compatibility.
  • BuiltinAutoGain post limiter: Added constant-latency post limiter after AGC (default -1.0 dBTP, fixed internal 1.0ms lookahead + 50ms release, constant delayed path, hard clamp). Advanced UI exposes Limiter Ceiling only.
  • ASIO channel selection reset on driver/device switch: Preserved per-driver input/output channel masks in DriverTypeSnapshot, and persisted explicit inputChannelMask/outputChannelMask index arrays in preset JSON for restart-safe restore (including non-contiguous routing). Invalid saved indices now fall back to safe defaults.

[4.0.2] - 2026-03-19

Added

  • Input Mute: Independent input mute — silences microphone while VST chain continues processing (reverb tails fade naturally, AGC enters freeze). [INPUT] button in INPUT section, green=active / red=muted
  • VSTChain.isStable(): Additional auto-save safety net
  • XRun: Click CPU/XRun label to manually reset counter

Changed

  • State Model (breaking): active_slot now 0-5 (5=Auto). auto_slot_active deprecated
  • Input Mute Toggle: Now independent from Panic Mute
  • input_muted state field: Now independent from muted
  • Mute Button UX: INPUT/OUT/MON/VST/PANIC/AUTO button colors and labels now clearly distinguish normal/user-mute/panic-lock states (PANIC active shows UNMUTE)

Fixed

  • XRun: 60-second window drift — now uses real elapsed time
  • Panic: Shows notification when recording was stopped during panic mute
  • UI: Freeze Level label LUFS → dBFS, AGC labels clarified (Boost/Cut)
  • Noise Removal: holdSamples and gateSmooth are now recalculated from runtime sample rate to preserve intended timing across SR changes

[4.0.1] - 2026-03-19

Fixed

  • NoiseRemoval: Ring buffer uint32_t overflow causing permanent silence after ~25h continuous use
  • HTTP API: Strict numeric validation — reject mixed alpha-numeric input (e.g., "abc0.5")
  • UI: Plugin chain editor negative height on very small window
  • State Broadcast: activeSlot clamped to 0-4, added auto_slot_active field for WebSocket/SD clients
  • Linux: Complete XDG Desktop Entry Exec key character escaping per spec §6
  • macOS: Notify user when hotkey accessibility permission not granted
  • Linux: Show "unsupported" message in Hotkeys tab instead of non-functional UI
  • HTTP API: Escape JSON special characters in API responses
  • Platform: AutoStart setters return bool, notify user on failure
  • IPC: Restrict POSIX semaphore/shm permissions to owner-only (0600)
  • XRun Tracking: Device restart no longer clears XRun history — display persists for full 60s window
  • Audio RT: Moved MMCSS LoadLibraryA call from RT callback to audioDeviceAboutToStart
  • MIDI: Fixed LearnTimeout use-after-free when timer callback destroyed itself
  • Preset: Added loadingSlot_ guard to Reset Auto to prevent intermediate state auto-save
  • Audio: Recorder now stops on device loss (audioDeviceStopped) to prevent WAV corruption
  • Preset: Auto first-click failure now sets partialLoad_ to prevent saving incomplete chain
  • Preset: pendingSlot_ cleared on Factory Reset / Clear All Presets
  • State: Plugin name now included in quickStateHash — name changes trigger WebSocket broadcast
  • WebSocket: broadcastToClients releases clientsMutex_ before socket writes — prevents slow client blocking shutdown
  • IPC: Receiver VST now calls detach() before close() on failed producer check — fixes spurious multi-consumer warning
  • Thread Safety: audioDeviceAboutToStart non-atomic variable writes deferred to message thread via callAsync
  • Update: PowerShell batch script now escapes single quotes in paths (e.g., O'Brien user profiles)
  • Audio: Added null guard on outputChannelData for ASIO legacy drivers
  • Preset: parseSlotFile now uses .bak fallback (loadFileWithBackupFallback) for crash resilience
  • UI: Plugin removal now identifies by index+name, not name-only (fixes duplicate-name removal)
  • WebSocket: Sends RFC 6455 close frame (1009) before disconnecting oversized-message clients
  • Settings: importAll/importFullBackup now check platform compatibility internally
  • Platform: macOS/Linux AutoStart uses atomicWriteFile for crash-safe plist/desktop writes
  • MIDI: Guard LearnTimeout callAsync with alive_ flag — prevent use-after-free on rapid shutdown
  • Audio RT: Add release/acquire barrier for MMCSS cached function pointers (ARM memory ordering safety)
  • Audio RT: Guard partial GetProcAddress failure — null both pointers to allow retry
  • VST: Validate nodeId in openPluginEditor second lock scope — prevent TOCTOU use-after-free
  • HTTP: Close client sockets on HttpApiServer::stop() — prevent shutdown hang on blocked handlers
  • WebSocket: Close socket on handshake failure — prevent zombie connections in clients_ vector
  • Cache: Remove dangerous thread detach in PluginPreloadCache::cancelAndWait — leak instead of use-after-free
  • IPC: Add atomic detach guard to RingBuffer — prevent null deref on concurrent detach/write
  • Audio: Protect desiredDevice_ reads in audioDeviceAboutToStart with SpinLock (cross-thread safety)
  • Settings: Guard SettingsAutosaver callAsync with alive_ flag — prevent use-after-free on fast quit
  • State: Fix masterBypassed computation — no longer reports true when plugins are unloaded (DLL missing)
  • WebSocket: Handle continuation frame (opcode 0x0) — prevent stream corruption on fragmented messages
  • Audio: Log error when driver snapshot restore fails (setAudioDeviceSetup return value was ignored)
  • Preset: Sync loadSlot path now sets partialLoad_ — prevent auto-save overwriting incomplete chains
  • WebSocket: Check sendFrame return on initial state delivery — disconnect on failure
  • Preset: Allow clearing slot name to empty (previously ghost name persisted in JSON)
  • Settings: Reset activeSlot to A on .dpbackup import (slot files not included in backup)
  • Receiver: Guard against processBlock before prepareToPlay — prevent infinite loop on empty buffer
  • Receiver: Reset lastOutputSamples_ in releaseResources — prevent stale fade-out data
  • Receiver: Add isBusesLayoutSupported for mono — fix OBS mono source left-channel-only output
  • Receiver: Report latency via setLatencySamples — enable DAW latency compensation
  • Receiver: Detect stale consumer_active after OBS crash — suppress false multi-consumer warning
  • Receiver: Add drift compensation hysteresis — reduce micro-gaps at Ultra Low preset
  • Receiver: Use saved buffer data in fade-out — eliminate click artifact on underrun
  • Stream Deck: Enable autoReconnect — recover from host restarts without UDP
  • Stream Deck: Clear stale state on reconnect — prevent displaying previous session data
  • Stream Deck: Handle activeSlot -1 and auto_slot_active — correct preset display
  • Stream Deck: Per-target volume override check — prevent unrelated targets from blocking
  • Build: Guard RNNoise x86 sources for ARM compatibility — fix Universal macOS build
  • Build: Conditional VST2 target in pre-release test — handle missing VST2 SDK
  • Build: Remove stale DeviceSelector.cpp/h files
  • Audio: Catch plugin processBlock exceptions — prevent app crash from third-party VST bugs
  • Audio: Add 48kHz warning when Auto button clicked at non-48kHz sample rate
  • MIDI: Overwrite duplicate CC bindings instead of creating duplicates
  • Audio: Notify user when monitor sample rate mismatches main device
  • Audio: Reset chainCrashed_ flag on device restart — user can recover after removing crashing plugin
  • Audio: Revert MMCSS registration in audioDeviceStopped — prevent handle leak on device restart
  • Audio: Protect audit log desiredDevice_ reads with SpinLock
  • Preset: Fix onResetSettings loadingSlot_ timing — let loadFromFile manage the guard internally
  • Settings: Clear partialLoad_ on successful self-heal in loadFromFile
  • State: masterBypassed requires at least one loaded plugin — unloaded slots no longer trigger false bypass
  • Audio: Windows SEH crash guard (__try/__except) for VST processBlock — catches access violations that try/catch misses
  • Audio: chainCrashed_ now resets on chain modification (plugin add/remove), not on every device restart
  • Audio: setInputDevice clears outputAutoMuted_ — prevents permanently stuck muted output after input device change
  • Audio: mmcssTaskHandle_ is now std::atomic — prevents data race between RT and device threads on ARM
  • Audio: Guard SharedMemWriter::shutdown() against double call in AudioEngine::shutdown()
  • Settings: Add null guard on getDynamicObject() in ControlMapping::load() — prevent crash on corrupt config
  • Audio: Guard audioDeviceAboutToStart against BS=0 or SR=0 — prevent VST prepareToPlay with invalid params
  • Audio: Move crash notification from RT thread to 30Hz message-thread timer — eliminate heap alloc in crash handler
  • Action: Add loadingSlot_ guard to AutoProcessorsAdd fallback path — prevent intermediate state auto-save
  • File I/O: Check atomicWriteFile return values at 4 sites — log warning on write failure instead of silent data loss
  • Security: HTTP server enforces 64-handler connection limit — prevents DoS via connection flooding
  • Security: WebSocket 32-client limit with atomic check+increment under clientsMutex_ — fixes TOCTOU race
  • AGC: Internal LUFS offset increased from -4dB to -6dB — output level closer to commercial levelers

[4.0.0] — Cross-Platform Release

v3에서 아키텍처 리팩토링 + 크로스플랫폼 확장 + 내장 프로세서 + 외부 제어 강화. MainComponent를 7개 focused module로 분할, Platform/ 추상화 레이어 도입, 294+ 테스트.

Architecture refactoring + cross-platform + built-in processors + enhanced external control. MainComponent split into 7 focused modules, Platform/ abstraction layer, 294+ tests.

Added — 새 기능

  • Cross-platform support — macOS (beta), Linux (experimental) alongside Windows (stable) / 크로스 플랫폼: macOS(베타), Linux(실험적)
  • Platform abstraction layer (Platform/) — PlatformAudio, AutoStart, ProcessPriority, MultiInstanceLock with per-OS implementations / 플랫폼 추상화 레이어
  • Built-in Processors (내장 프로세서) — VST 없이 기본 마이크 처리 제공:
    • Filter — HPF (60Hz ON) + LPF (16kHz OFF), 프리셋 + Custom 슬라이더 / High-pass + Low-pass filter
    • Noise Removal — RNNoise AI 노이즈 제거, 3단계 강도 (Light/Standard/Aggressive), 48kHz 전용, VAD 게이팅 / AI noise suppression with VAD gating
    • Auto Gain — LUFS 기반 자동 볼륨 레벨러, WebRTC 듀얼 envelope 패턴 / LUFS-based AGC with WebRTC dual-envelope
  • [Auto] 프리셋 슬롯 — A-E와 별도인 특수 슬롯 (인덱스 5). 원클릭 Filter+NR+AGC 기본 체인 / Special preset slot for one-click built-in processor chain
  • Safety Limiter — VST 체인 후 모든 출력 경로 전에 적용되는 피드포워드 리미터 (0.1ms attack, 50ms release, -0.3dBFS) / Feed-forward limiter after VST chain
  • Stream Deck 10 액션 — 기존 7개 + Performance Monitor, Plugin Parameter (SD+), Preset Bar (SD+) / 10 actions (was 7)
  • 19 통합 액션 — XRunReset, SafetyLimiterToggle, SetSafetyLimiterCeiling, AutoProcessorsAdd 추가 / 19 actions (was 15)
  • IPC consumer_active 감지 — Receiver VST 다중 연결 시 경고 표시 / SPSC violation warning when multiple Receivers connect
  • DPC Latency 대책 — MMCSS "Pro Audio" AVRT_PRIORITY_HIGH, IPC SetEvent 최적화, 콜백 오버런 감지 / MMCSS registration, IPC optimization, callback overrun detection
  • SHA-256 체크섬 검증 — 자동 업데이터 다운로드 무결성 확인 (checksums.sha256) / Auto-updater integrity check
  • 48kHz NotificationBar 경고 — Auto/NR 추가 시 비-48kHz 샘플레이트 경고 / Warning when NR added at non-48kHz
  • ActionHandler — 중앙 액션 라우팅, MainComponent에서 추출 / Centralized action routing
  • SettingsAutosaver — dirty-flag + 1초 디바운스 자동 저장 / Auto-save with debounce
  • StatusUpdater — 30Hz UI 상태 갱신, MainComponent에서 추출 / Periodic status updates
  • PresetSlotBar — 프리셋 슬롯 A-E 버튼, 우클릭 컨텍스트 메뉴 / Preset slot buttons with context menu
  • UpdateChecker — GitHub API 업데이트 체크 + 다이얼로그 / Update check + dialog
  • HotkeyTab / MidiTab / StreamDeckTab — Controls 서브탭 분리 / Split into separate files
  • ActionResult 패턴 — ok/fail 구조화 반환값 / Structured error handling
  • HTTP CORS preflight — 브라우저 클라이언트용 OPTIONS 핸들러 / Browser client support
  • CONTRIBUTING.md / SECURITY.md — 기여 가이드 + 보안 취약점 보고 절차 / Contributor and security guidelines
  • 294+ 테스트 — NR, AGC, VSTChain, DeviceState, PresetManager, Safety Limiter 등 / Comprehensive test suite

Fixed — 버그 수정

  • AGC freeze gate — 무음 구간에서 게인을 0dB로 리셋하던 버그 → 현재 게인 유지 (hold) / Freeze now holds current gain instead of resetting to unity
  • AGC 오버슈트 — 1.5s LUFS 윈도우 + IIR envelope 이중 지연 → WebRTC 듀얼 envelope + direct gain으로 해결 / Dual-envelope resolves overshoot from double-smoothing
  • Mono 합산 +3dB — L+R 합산 시 나눗셈 누락 → numInputChannels로 평균 / Fixed mono summing to average instead of raw sum
  • MIDI Continuous 게인 — InputGainAdjust에 0-1.0 delta 적용되던 버그 → SetVolume으로 절대 게인 설정 / Continuous CC now maps to absolute gain via SetVolume
  • HTTP gain 범위 — /api/gain/:delta 범위 검증 추가 (-2.0~2.0) / Added range validation
  • outputFifoWrite/Read 오버플로 — BuiltinNoiseRemoval의 int → uint32_t (12시간 후 정의되지 않은 동작 방지) / Prevent undefined behavior after ~12h
  • quickStateHash 누락 — chainPDCMs 필드 미포함 → 해당 변경이 브로드캐스트 안 되던 문제 / Added missing field to state hash
  • Panic mute 모든 액션 차단 — 패닉 뮤트 중 바이패스, 볼륨, 프리셋 등 모든 액션 차단 / All actions blocked during panic mute
  • Panic mute 녹음 중지 — 패닉 뮤트 시 녹음 자동 중지 (해제 시 재시작 안 함) / Recording stops on panic engage
  • HTTP gain delta 스케일링 — *0.1f 보상용 *10.0f 스케일링 문서화 / Documented gain scaling convention

Changed — 변경사항

  • AGC 아키텍처 — IIR envelope → WebRTC 듀얼 envelope (fast 10ms/200ms + slow 0.4s LUFS) + direct gain / Architecture rewrite
  • AGC 기본값 — hiCorr 0.75→0.90, maxGain 24→22dB, LUFS 1.5s→0.4s, release 700→100ms, -4dB 타겟 오프셋 / Updated defaults
  • CI/CD 릴리스 에셋 — win64.zip → Windows.zip, linux-x64.tar.gz → Linux.tar.gz (업데이터 플랫폼 태그 일치) / Asset names match updater
  • CI checksums.sha256 — 릴리스 아티팩트 SHA-256 체크섬 자동 생성 / Auto-generated checksums
  • MainComponent — ~1,835줄 → ~729줄 (7개 클래스 추출) / Reduced via extraction
  • 기본 핫키 — 11개 (Ctrl+Shift+F6=Input Mute, Ctrl+Shift+1~3=Plugin 1-3 Bypass 등) / 11 default hotkeys
  • juce_cryptography 모듈 추가 — SHA-256 검증용 / Added for checksum verification

[3.10.3] — Final Stable Release

이 버전은 v3.10.x 라인의 최종 안정 릴리스입니다 (Windows 전용). 이후 치명적 버그와 보안 패치만 적용됩니다. 새 기능과 크로스 플랫폼은 v4.0+을 참조하세요.

This is the final stable release of the v3.10.x line (Windows only). Only critical bug fixes and security patches will be applied after this point. For new features and cross-platform support, see v4.0+.

Fixed

  • outputPanelPtr_ 댕글링 포인터 위험 — SafePointer<OutputPanel>로 교체 / Dangling pointer risk — replaced with SafePointer<OutputPanel>
  • 슬롯 이름 변경 다이얼로그 AlertWindow 이중 해제 — enterModalState 소유권 수정 / AlertWindow double-delete in slot rename dialog — fixed enterModalState ownership
  • pre-release-test.sh 테스트 exe 경로 수정 + summary 렌더링 버그 수정 / Fixed test exe paths and summary rendering bug

Changed

  • README에 최종 안정 버전 안내 문구 추가 / Added final stable version notice to README
  • CHANGELOG.md 생성 (전체 버전 히스토리) / Created CHANGELOG.md with full version history

[3.10.2]

Fixed

  • ASIO device selection fallback and driver combo sync

[3.10.1]

Fixed

  • VST bypass state, preset slot oscillation, and cache corruption

[3.10.0]

Added

  • Multi-instance external control priority (Named Mutex coordination)
  • Audio-only mode for secondary instances
  • Driver type snapshot/restore (including Output None state)
  • Per-direction device loss detection with "(Disconnected)" UI
  • Quit button in Settings tab

Fixed

  • Output None bug when switching WASAPI to ASIO
  • PluginChainEditor delete failure (name mismatch)
  • LevelMeter smoother for visual consistency

[3.9.12]

Fixed

  • ASIO startup buffer size bounce (wrong device selection)
  • pushNotification MPSC race condition
  • MonitorOutput alive_ lifetime guard
  • AudioRingBuffer reset ordering
  • StateBroadcaster slotNames hash

[3.9.11]

Fixed

  • Output device switching fallback false positive
  • Input channel loss when changing WASAPI output device

[3.9.10]

Fixed

  • ASIO buffer size persistence (desiredBufferSize_ preserves user request)

[3.9.9]

Added

  • Slot naming (right-click Rename, display as A|Name)
  • Individual slot export/import (.dppreset)
  • StateBroadcaster slot_names array

[3.9.8]

Added

  • Device fallback protection (intentionalChange_ flag)
  • Hotkey drag-and-drop reorder
  • MIDI HTTP API test endpoints
  • MIDI Learn / key recording cancel buttons

[3.9.7]

Added

  • Instant preset switching (keep-old-until-ready)
  • Settings scope separation (Save/Load vs Full Backup)
  • Full Backup/Restore (.dpfullbackup)

[3.9.6]

Added

  • Device auto-reconnection (dual mechanism: ChangeListener + timer polling)
  • Monitor device reconnection
  • Device combo click-to-refresh
  • StateBroadcaster device_lost/monitor_lost

[3.9.5]

Added

  • WASAPI Exclusive Mode (5th driver type)
  • Audio optimizations (timeBeginPeriod, ScopedNoDenormals, RMS decimation)
  • XRun monitoring (rolling 60s window)

[3.9.4]

Fixed

  • Modal dialog fixes
  • HTTP API input gain range
  • Constructor SafePointer patterns

[3.9.3]

Fixed

  • 25 bug fixes: thread safety, lifetime guards, server fixes, RT-safety

[3.9.2]

Added

  • Categorized logging ([AUDIO], [VST], [PRESET], etc.)
  • LogPanel batch flush optimization

Fixed

  • VSTChain lock-ordering hazard with DirectPipeLogger

[3.9.0]

Added

  • Buffer display in status bar
  • Sample rate propagation (main SR applies globally)
  • Monitor SR mismatch detection
  • Receiver VST SR warning

[3.8.0]

Added

  • Auto-updater UI (download + auto-restart on Windows)
  • CJK font fix (platform-specific font selection)

[3.7.0]

Fixed

  • Plugin scanner crash (moreThanOneInstanceAllowed)

[3.6.0]

Added

  • IPC Toggle action (Ctrl+Shift+I)
  • Receiver VST buffer size configuration (5 presets)
  • Panic mute lockout (all controls locked during panic)

[3.5.0]

Added

  • NotificationBar (non-intrusive, color-coded, auto-fade)
  • LogPanel (Settings tab with log viewer + maintenance tools)

Fixed

  • 4 callAsync lifetime guard fixes

[3.4.0]

Added

  • System tray tooltip (current state on hover)
  • Plugin scanner search/sort
  • Audio recording (WAV, lock-free)
  • Settings save/load (.dpbackup)
  • MIDI plugin parameter mapping
  • In-app auto-updater (version check)