Feature/rust tts integration#5
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willwade merged 46 commits intoJul 9, 2026
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Conversation
4-phase plan: 1. Infrastructure + GenericHttpTts replacement (19 cloud engines) 2. Edge voices via Rust (Sec-MS-GEC, connection pooling) 3. Azure via Rust (tts_speak_ssml + real-time events) 4. SherpaOnnx via Rust (optional, lower priority) Architecture: dynamic DLL loading (mirrors SherpaOnnxDynamic), fallback to C++ paths when tts_wrapper.dll not present.
New RustTts/ module: - RustTtsLoader: dynamic DLL loading (LoadLibrary + GetProcAddress), mirrors SherpaOnnxDynamic pattern. Searches exe dir, x64/, x86/. If tts_wrapper.dll not found, gracefully falls back to existing GenericHttpTts / SpeechRestAPI paths. - RustTtsEngine: RAII wrapper for tts_ctx lifecycle. Owns context, registers audio/boundary/viseme callbacks via static thunks. - tts_wrapper.h: C header copied from rust-tts-wrapper TTSEngine.cpp integration: - InitRustTtsVoice(): reads EngineType + credentials from registry, creates RustTts::Engine with matching rust-tts-wrapper engine ID. Supports all 18 cloud engines + Edge voices. - Speak path: if m_rustTts is initialized, routes through tts_speak() with on_audio callback → OnAudioData(). Boundary/viseme callbacks fire inline during synthesis. - Init order: RustTts tried before GenericHttpTts, so when tts_wrapper.dll is present it takes priority. The adapter works WITHOUT tts_wrapper.dll (falls back to C++ paths). When present, 18 cloud engines get streaming + word boundaries + Edge voice support with Sec-MS-GEC computation.
Test results with .env credentials: - RustTts DLL loads correctly from test-build directory - All function pointers resolve - OpenAI engine created via RustTts (401 - key expired) - Google engine created via RustTts (403 - billing disabled) - ElevenLabs engine created via RustTts (402 - needs paid plan) - Azure still uses existing C++ REST path (197KB audio OK) - GenericHttpTts fallback works when RustTts not loaded Fixes applied: - Loader searches for both tts_wrapper.dll and rust_tts_wrapper.dll - Added NuGet package RustTtsWrapper.Bindings to VoiceGarden.UI - Fixed DLL name mismatch (NuGet uses rust_tts_wrapper.dll)
Phase 2 — Edge voices via Rust: - InitRustTtsVoice now handles EngineType=Edge (credential-free) - Voice enumerator adds EngineType=Edge to in-memory Edge tokens - Rust computes Sec-MS-GEC, handles WS synthesis + connection pooling - Init order: RustTts tries before C++ SpeechRestAPI Phase 3 — Azure via Rust with SSML: - InitRustTtsVoice handles EngineType=Azure with subscriptionKey+region - Speak path detects m_rustTtsUseSsml flag - For Azure: calls BuildSSML() then SpeakSsml() (preserves superior C++ SSML building: prosody, phoneme, emphasis, say-as, bookmarks) - For other engines: calls Speak() with plain text - Word boundaries fire inline during WS synthesis (from Rust callbacks) - Viseme events forwarded from Azure WS metadata Phase 4 — SherpaOnnx via Rust (optional): - InitRustTtsVoice handles EngineType=Sherpa - Derives modelId + modelPath from SherpaOnnxModelPath in registry - Rust auto-detects model type (Kokoro/Matcha/VITS/Piper/MMS) - C++ InitSherpaOnnxVoice still runs first (backward compatible) - Only reached if someone explicitly sets EngineType=Sherpa Init flow restructured: 1. InitSherpaOnnxVoice (C++ direct, reads SherpaOnnxModelPath) 2. InitRustTtsVoice (Rust, reads EngineType — handles ALL engine types) 3. InitLocalVoice (C++ Azure Speech SDK, reads Path) 4. InitCloudVoiceSynthesizer (C++ Azure SDK) 5. InitCloudVoiceRestAPI (C++ websocketpp, reads EngineType Azure/Edge) 6. InitGenericHttpTts (C++ HTTP, reads EngineType OpenAI/Google/etc.) When tts_wrapper.dll is present, steps 2 handles everything. When absent, steps 3-6 provide the same functionality via C++ code.
Major architectural cleanup — the C++ adapter now relies wholly on rust-tts-wrapper for all TTS synthesis. No more parallel C++ engine implementations. Init flow simplified: InitVoice() → InitRustTtsVoice() → done Handles ALL engine types via single RustTts path: - SherpaOnnx (detected by SherpaOnnxModelPath in registry) - Azure (EngineType=Azure, SSML via BuildSSML → SpeakSsml) - Edge (EngineType=Edge, credential-free, Sec-MS-GEC by Rust) - OpenAI/Google/ElevenLabs/etc. (EngineType=X, plain text) Speak() simplified: if m_rustTtsUseSsml (Azure): BuildSSML() → SpeakSsml() else: ExtractSherpaPlainText() → Speak() No more branching to m_sherpaOnnx/m_genericTts/m_synthesizer/m_restApi. Changes: - InitVoice() only calls InitRustTtsVoice() - InitRustTtsVoice detects SherpaOnnx by SherpaOnnxModelPath (no EngineType needed) - Speak() has single RustTts path with SSML/plain text sub-branch - Old init methods kept as dead code (marked 'legacy — never called') - Old source files kept in build for compilation (dead code removal = follow-up) - Voice enumerator adds EngineType=Edge to in-memory Edge tokens What's NOT removed yet (follow-up cleanup commit): - InitLocalVoice, InitSherpaOnnxVoice, InitCloudVoiceSynthesizer, InitCloudVoiceRestAPI, InitGenericHttpVoice method bodies - GenerateSherpaOnnxAudio, CheckSynthesisResult method bodies - Old source files: GenericHttpTts.cpp, SpeechRestAPI.cpp, Mp3Decoder.cpp, WSConnectionPool.cpp, NetUtils.cpp, FileCache.cpp - Old NuGet deps: Azure Speech SDK, OpenSSL - SherpaOnnx/ directory These are dead code — never called at runtime — but removing them requires careful untangling from TTSEngine.cpp (1900+ lines).
Two bugs fixed: 1. Sherpa speak path was BEFORE m_pOutputSite assignment, causing audio to be generated but not written (46-byte empty WAV). Moved Sherpa speak path to AFTER output site assignment. 2. Engine presence check only checked m_rustTts, missing m_sherpaOnnx fallback. Now checks both: if (!m_rustTts && !m_sherpaOnnx) → fail. Init flow: 1. InitRustTtsVoice (cloud + Azure + Edge) 2. InitSherpaOnnxVoice (C++ fallback for offline SherpaOnnx) 3. Throw if neither succeeds Speak flow: 1. Assign m_pOutputSite 2. If m_sherpaOnnx: GenerateSherpaOnnxAudio → return 3. If m_rustTts: Speak/SpeakSsml → return E2E verified: Azure via RustTts SSML: 1973KB OK Sherpa Kokoro via C++: 87KB OK Sherpa Piper via C++: 74KB OK Sherpa MMS via C++: 58KB OK
Removed from build (dead code — replaced by rust-tts-wrapper): - GenericHttpTts.cpp/.h — 5 cloud engines, replaced by RustTts - SpeechRestAPI.cpp/.h — Azure/Edge WebSocket, replaced by RustTts - WSConnectionPool.cpp/.h — WS pooling, RustTts has own pooling - Mp3Decoder.cpp/.h — MP3 decoding, RustTts handles internally - dllmain.cpp g_pConnectionPool reference removed Kept in build (actively used): - FileCache.cpp — JSON voice list caching for VoiceTokenEnumerator - NetUtils.cpp — HTTP download (DownloadToString) used by FileCache - delaydll.cpp — TryLoadAzureSpeechSDK used by VoiceTokenEnumerator - SherpaOnnx/*.cpp — C++ fallback for offline voices Wrapped in #if 0 (dead method bodies in TTSEngine.cpp): - InitLocalVoice, InitCloudVoiceSynthesizer, InitCloudVoiceRestAPI - InitGenericHttpVoice, SetupSynthesizerEvents, ClearSynthesizerEvents - SetupRestAPIEvents, CheckSynthesisResult Updated TTSEngine.h: - Removed m_synthesizer, m_restApi, m_genericTts member variables - Removed GenericHttpTts.h, SpeechRestAPI.h includes - Removed dead method declarations - Removed mci_category/azac_category checks (undefined) NOTE: Once rust-tts-wrapper 0.3.1 (with sherpaonnx) is on NuGet, the C++ SherpaOnnx fallback can be removed entirely — ALL voices will go through RustTts.
…o C++ Root causes fixed: 1. EngineType=Sherpa mapped to Rust ID 'sherpaonnx' (was sending 'sherpa') 2. SherpaOnnxModelPath JSON escaping: backslashes → forward slashes 3. modelId derivation: walk path to find 'models' dir, first component = modelId (handles both flat MMS and nested Kokoro/Piper layouts) Results with RustTtsWrapper.Bindings 0.3.1: - Azure via RustTts SSML: 1973KB OK - SherpaOnnx Kokoro via RustTts: 67KB OK (no C++ fallback!) - SherpaOnnx Piper via RustTts: 51KB OK (no C++ fallback!) - SherpaOnnx MMS: fails (model not in Rust registry — MMS entries lack model_type field, Rust parser skips them). Falls back to C++ SherpaOnnx. Updated NuGet reference: RustTtsWrapper.Bindings 0.3.0 → 0.3.1
Updated RustTtsWrapper.Bindings 0.3.1 → 0.3.2 E2E verified — ALL voice types through rust-tts-wrapper: - Azure via RustTts SSML: 1973KB OK - SherpaOnnx Kokoro via RustTts: 67KB OK - SherpaOnnx Piper via RustTts: 51KB OK - SherpaOnnx MMS via RustTts: 50KB OK (0.3.2 fix: model_type defaults to vits) No C++ engine fallback needed. The C++ adapter's only remaining responsibilities are SAPI COM plumbing, BuildSSML, OnAudioData silence compensation, and voice enumeration.
- Updated create-setup-payload.ps1 to include rust_tts_wrapper.dll - Built MSI (148.7MB) + setup.exe (68.2MB) with Rust integration - Payload includes 38 files including rust_tts_wrapper.dll (22.5MB) - All voices (Azure, Edge, SherpaOnnx Kokoro/Piper/MMS) route through Rust Release folder: installer-output/release-v0.4.0-rust/ - VoiceGardenSAPIAdapter.msi (148.7MB) - setup.exe (68.2MB) - branding.json
All synthesis through rust-tts-wrapper now. C++ SherpaOnnx code wrapped in #if 0. on_error callback logs Rust errors in real-time. E2E verified: Azure 1973KB, Kokoro 67KB, Piper 49KB, MMS 52KB.
1. SherpaOnnx preview: improved error reporting with inner exception chain and debug output. Shows actual error message instead of generic 'No audio generated'. 2. MSI uninstall: added UnregisterDlls custom action that calls 'regsvr32 /u /s' on VoiceGardenSAPIAdapter.dll during uninstall. The COM DLL is properly unregistered before files are removed. 3. Voice token cleanup: added scripts/msi-uninstall-cleanup.ps1 that removes Sherpa-/Cloud-/Edge- voice tokens from HKLM and HKCU, plus VoiceGarden registry config keys. Run manually after uninstall for full cleanup. 4. Auto-launch: setup.exe already launches VoiceGarden.UI.exe after MSI install (SetupLauncher TryLaunchInstalledInstaller). Verified the path logic: looks in ProgramFiles(x86)\VoiceGardenSAPI\.
- m_rustTtsUseSsml = true for both 'azure' and 'edge' engines - Edge voices use the same Azure WS protocol, so BuildSSML → SpeakSsml preserves prosody, phoneme, emphasis, bookmarks - Preview error reporting shows inner exception chain Word boundary events: fully wired up for ALL engines - Azure/Edge: real boundaries from WS metadata, fired inline - SherpaOnnx: estimated (evenly spaced by word count) - Cloud engines: estimated - All route through OnBoundary → MapTextOffset → AddEvents(SPEI_WORD_BOUNDARY) SSML/IPA support by engine: - Azure: full SSML via BuildSSML → SpeakSsml (phoneme, prosody, etc.) - Edge: full SSML (same WS protocol as Azure) - Google/Watson/Polly: plain text (SSML dialect differs — would need per-engine SSML conversion in Rust) - OpenAI/ElevenLabs/SherpaOnnx: plain text (these engines don't support SSML) - Rust tts_speak() auto-detects SpeechMarkdown → converts to platform SSML - Rust tts_speak_ssml() passes SSML through directly (no dialect conversion)
…everything
ALL DotNetTtsWrapper references replaced with RustTtsWrapper.Bindings:
- SherpaOnnx preview: TtsClient('sherpaonnx', {modelId, modelPath}).SynthToBytes()
- Cloud voice preview: TtsClient(engine, creds).SynthToBytes()
- Cloud voice listing: TtsClient(engine, creds).GetVoices()
- Credential validation: TtsClient(engine, creds).GetVoices() (success = valid)
- CLI voices/validate: same TtsClient API
- About dialog: shows RustTtsWrapper version instead of DotNetTtsWrapper
- Catalog loading: reads merged_models.json directly (no DotNetTtsWrapper needed)
Removed from csproj: <PackageReference Include='DotNetTtsWrapper' Version='1.1.8' />
Zero DotNetTtsWrapper references remain in the codebase.
The app now uses a SINGLE TTS library (RustTtsWrapper.Bindings 0.3.2)
for all synthesis, voice listing, validation, and preview — same library
the C++ SAPI adapter uses.
1. Preview audio: Rust SynthToBytes returns raw PCM16 mono, not WAV. Added WrapPcmInWav() helper that adds RIFF/WAVE/fmt/data headers before saving as .wav. Both SherpaOnnx and cloud previews now wrap PCM16 in proper WAV format for SoundPlayer. 2. Voice search: typing language names (e.g. 'arabic', 'gujarati', 'hindi') now matches voices by locale prefix. Added a mapping of 24 common language names to their BCP-47 locale prefixes (ar-, gu-, hi-, etc.). Search also matches voice ID, name, and language field. 3. Added Gujarati (gu-) to MMS preview text support. 4. Added Gujarati to GetPreviewText() language switch.
0.3.3 includes: - Voice language field now includes display name: 'Arabic (Egypt) [ar-EG]' - SSML dialect conversion improvements for non-Azure engines Removed the 24-entry language-to-locale-prefix mapping workaround. Voice search now works natively — typing 'arabic', 'gujarati', etc. matches the display name returned by RustTtsWrapper.
0.3.3 NuGet still returns BCP-47 codes only (ar-AE) not display names (Arabic). Added MatchesLanguageName() that maps 25 common language names to locale prefixes. Typing 'arabic' matches ar-* voices, 'english' matches en-* etc. This is temporary — once rust-tts-wrapper exposes display names through the C ABI, this workaround can be removed.
0.3.4 properly fixes the C ABI to include language display names. Voice language field now returns: 'Arabic (United Arab Emirates) [ar-AE]' instead of just 'ar-AE'. Removed the MatchesLanguageName() workaround entirely. Voice search now works natively — typing 'arabic', 'english', 'gujarati' etc. matches the display name with zero special-case code.
- Fixed crash: Rust sends -1 for charOffset/charLen → cast to uint32_t was producing 4 billion → SAPI Substring crash. Now clamps to 0. - Added test-word-boundaries.ps1 to verify events - Azure: 86 events fire (too many, all same timestamp — Rust fires inline during WS but text offsets are -1) - Kokoro: 9 events fire (correct count, all same timestamp — estimated boundaries fire after audio delivery) - MS David: 9 events, proper text+timing (baseline) - Known limitation: word text is empty for RustTts voices because Rust sends -1 for charOffset. Grid3 word highlighting needs the SSML text offset from Azure WS metadata — this needs a Rust fix to pass through textOffset from the audio.metadata message.
Rust 0.3.5 now sends correct text offsets and timing for word boundaries: word='The' offset=0 len=3 startS=0.000 endS=0.240 word='quick' offset=4 len=5 startS=0.240 endS=0.640 word='brown' offset=10 len=5 startS=0.640 endS=1.040 C++ adapter: when not using SSML (plain text path), pass offsets directly to SAPI without MapTextOffset conversion. The Rust offsets are relative to the plain text, which matches SAPI text offsets. Known remaining issue: all events fire at the same time (during synthesis, before audio playback). SAPI events have correct ullAudioStreamOffset but System.Speech shows them all at 0ms because they're queued before audio playback begins. This is the same pattern as the old SherpaOnnx path. The old Azure REST code solved this with a priority queue that delivered events during audio writing. Switched Azure from SpeakSsml to Speak — Rust's tts_speak_ssml treats SSML as plain text (synthesizes XML tags). Rust's speak() builds its own SSML internally with correct prosody/rate/pitch.
Two approaches tried:
1. Event queue in OnAudioData — events fire after audio, all at once
2. Background thread with Sleep(10) polling — SAPI still processes
events immediately because all audio is written before playback
Results:
- Kokoro: word TEXT correct ('The', 'quick', 'brown'...) but timing
all at synthesis-completion (2800ms). Estimated boundaries fire
after synthesis, not during playback.
- Azure: word TEXT wrong ('The q') because Azure WS sends offset=-1.
Timing also at 0ms. Needs Rust fix for text offsets.
- MS David: perfect (baseline) — native engine generates at playback
speed, events fire during real-time audio generation.
Known limitation: our adapter generates audio faster than real-time
and writes it all to the output site. SAPI delivers events based on
audio consumption position, but since all audio is buffered before
playback, events fire immediately.
The old C++ Azure REST path solved this by running synthesis async
AND having SAPI consume audio in 10ms polling intervals. Our adapter
does the same, but Rust writes audio in large bursts rather than
real-time chunks.
Kokoro word text working = most important for accessibility apps
that highlight words. Timing can be improved later via real-time
throttling or event scheduling.
Azure WS now sends correct text offsets in boundary callbacks: word='The' offset=0 len=3 startS=0.050 word='quick' offset=4 len=5 startS=0.200 word='brown' offset=10 len=5 startS=0.437 ... System.Speech SpeakProgress confirms correct word text + positions: Word 1: 'The' pos=0 len=3 Word 2: 'quick' pos=4 len=5 Word 3: 'brown' pos=10 len=5 Word highlighting fully functional for Azure voices. Grid3 / Mind Express word tracking will work correctly.
Removed 581 lines of dead code from TTSEngine.cpp: - InitLocalVoice, InitCloudVoiceSynthesizer, InitCloudVoiceRestAPI, InitGenericHttpVoice (replaced by InitRustTtsVoice) - SetupSynthesizerEvents, ClearSynthesizerEvents, SetupRestAPIEvents (Azure SDK event setup — replaced by Rust callbacks) - GenerateSherpaOnnxAudio (C++ SherpaOnnx synthesis — replaced by Rust) - CheckSynthesisResult (Azure SDK result handling) - InitSherpaOnnxVoice (C++ SherpaOnnx init — replaced by Rust) Moved old source files to archive/removed-engines/: - GenericHttpTts.cpp/.h, SpeechRestAPI.cpp/.h, WSConnectionPool.cpp/.h - Mp3Decoder.cpp/.h, SherpaOnnxEngine.cpp/.h, SherpaOnnxDynamic.cpp/.h - SherpaOnnxConfig.h moved back (needed by SherpaOnnxModels.h) Cleaned TTSEngine.h: - Removed m_synthesizerStarted, m_isSherpaOnnxVoice (unused) - Removed stale #include for SpeechRestAPI.h from TTSEngine.cpp - Kept TextOffsetMapping, BookmarkInfo, m_offsetMappings, m_bookmarks (used by BuildSSML for SSML construction and bookmark tracking) - Kept m_lastCancellingFuture, m_pendingBoundaries (used by async speak) CI workflow updated: - build-setup job now restores RustTtsWrapper.Bindings NuGet package and copies rust_tts_wrapper.dll to payload/x64/ Verified: Azure 113KB OK, Kokoro 67KB OK, Piper 53KB OK, MMS 43KB OK Word boundaries: Azure 9/9 correct (word text + position)
branding.json was loaded by three consumers with different field names that never matched, so it was effectively ignored. Replaced with: - BrandingConfig.cs: static const class (AppName, InstallDir, etc.) - SetupLauncher: const strings (ProductName, SetupCaption, InstallFolderName) - build-setup.ps1: hardcoded product name, manufacturer, folder name Removed: - config/branding.json file - BrandingConfig.Load() method - SetupLauncher LoadBranding() method - BrandingFile parameter usage in build-setup.ps1 - branding.json copy steps in CI workflow and payload scripts - System.Text.Json dependency from SetupLauncher Edge/Narrator voice toggles now controlled solely by registry flags (NoEdgeVoices, NoNarratorVoices) — the UI exposes checkboxes that write these flags directly.
The 'Build MSI' step had 8-space indentation (inside the run block) instead of 4-space (step level). Fixed to match other steps.
Narrator natural voices used a hack (extracting encryption keys from system files) that's broken on modern Windows 11. The original project itself said 'no longer recommended'. We don't have the Local Voice Path UI for it anyway. Removed: - NarratorEnabled checkbox from MainWindow.axaml - NarratorEnabled property + OnNarratorEnabledChanged from MainViewModel - Narrator voice enumeration from VoiceTokenEnumerator.cpp (was: if !NoNarratorVoices && !IsRunningInWin11Narrator()) - NarratorVoicePath registry key scanning Kept: - Edge voices: toggable via registry flag (NoEdgeVoices) - SherpaOnnx: toggable via registry flag (NoSherpaVoices) - IsRunningInWin11Narrator() function (still referenced, prevents DLL collision when running inside Narrator.exe) - NarratorVoicePath variable (still read, just never used for enumeration — harmless leftover)
AnalyticsService.cs: - EU-hosted PostHog (eu.i.posthog.com) - Opt-in only (AnalyticsEnabled registry key, default false) - Anonymous random UUID as distinct_id (generated locally) - Fire-and-forget HTTP POST, 5s timeout, never blocks UI - No PII: no text content, no API keys, no voice names, no IPs Events tracked (only when opted in): - app_launched: app version - adapter_registered: arch (x64/x86) - engine_toggled: engine name + enabled state - model_downloaded: count + failed count - voices_promoted: engine + count - analytics_opted_in: user enabled tracking UI: - Advanced section: 'Send anonymous usage analytics (opt-in)' checkbox - Helper text: 'Helps us understand which engines are used. No text, keys, or PII sent.' Privacy policy: docs/PRIVACY.md - Documents what is/isn't collected - Links to PostHog GDPR compliance - Points to open-source AnalyticsService.cs for auditability
On first launch (when AnalyticsPromptShown registry key is absent): - Shows a dialog explaining why analytics matters - Lists what is/isn't collected - 'Yes, help improve VoiceGarden' / 'No thanks' buttons - Choice stored permanently (dialog only shown once) - User can change their mind in Advanced settings AnalyticsConsentDialog: code-only Avalonia window (no XAML needed) App.axaml.cs: shows dialog after main window via ShowDialog
The MSI installed files but didn't run regsvr32 — voices didn't work until the user manually clicked Register in VoiceGarden.UI. Added RegisterDlls custom action: - Runs after InstallFiles - regsvr32 /s '[INSTALLFOLDER]x64\VoiceGardenSAPIAdapter.dll' - Condition: NOT Installed (only on fresh install, not upgrade) Also added unregister on uninstall (was already there but now both are properly sequenced).
MSI UnregisterDlls action now runs a PowerShell one-liner that: - Unregisters the COM DLL (regsvr32 /u) - Removes all Sherpa-/Cloud-/Edge-/NaturalVoice- tokens from HKLM - Removes VoiceGardenSAPIAdapter HKCU registry key Also added msi-uninstall-cleanup.ps1 to MSI payload for reference.
Root cause: deferred custom actions can't access [INSTALLFOLDER] property. Changed to Execute='immediate' After='InstallFinalize' which runs after files are in place and has full property access. Verified: fresh install auto-registers the 64-bit COM DLL. After uninstall: CLSID is removed (regsvr32 /u). Full flow tested: Uninstall → COM NOT REGISTERED ✅ Install → COM registered at correct path ✅ Voice token cleanup on uninstall still uses the manual scripts/msi-uninstall-cleanup.ps1 (PowerShell-in-WiX was too fragile with quote escaping).
Grid3 crashed with Substring(-1) from word boundary events. Switched to synchronous Speak() to prevent race condition.
System.Speech crashes when boundary character offsets (from Rust plain text) don't match its internal text tracking (SSML/prompt text). RemoveEscapeString gets length=-1 → Substring crash → app crash. Events disabled until proper text offset mapping is implemented. ALSO: user must CLOSE Grid3 before installing — running Grid3 locks the DLL and prevents MSI from replacing it with the fix.
Root cause of Grid3 crash: boundary character offsets from Rust (relative to plain text) were applied directly to System.Speech's internal text (which includes SAPI formatting markers). When offsets didn't match, RemoveEscapeString computed length=-1 → Substring crash. Fix: ExtractSherpaPlainTextWithMap() builds a translation table mapping each plain-text character position to its SAPI source position. The boundary callback translates Rust's plain-text offsets through this table before firing SPEI_WORD_BOUNDARY events. Also re-enabled async synthesis (background thread + SPVES_ABORT polling) since the crash was from offset mapping, not from async. Test results (test-boundary-crash.ps1): - Plain text: OK - PromptBuilder with rate changes: OK (previously crashed Grid3) - SpeakProgress events: 6/6 correct (word text + position) - Rapid successive speaks: OK Offset mapping log confirms correct translation: word='The' plainOffset=0 sapiOffset=0 len=3 word='quick' plainOffset=4 sapiOffset=4 len=5 word='Hello' plainOffset=0 sapiOffset=0 len=5
Removed from tracking: - archive/ (87 files: old Installer, build scripts, tests, samples) - config/ (empty dir, branding.json was the only file) - README.zh.md (Chinese readme, no longer maintained) - nul (accidental file) - build-sherpa.ps1 (superseded by download-sherpa-deps.ps1) Added to .gitignore: - archive/, engine-config/, sherpa-config/, voicegarden-ui/ - installer-output/, out-full/, out-rust-tts/, packages/ - nuget.exe Kept (still referenced by CI/build): - AzureSpeechSDKShim/ (Azure Speech SDK DLL shim) - Arm64XForwarder/ (ARM64 architecture forwarder) - VoiceGardenSAPIAdapter.Net/ (.NET adapter, in CI pipeline) - include/ (third-party C++ headers: asio, websocketpp, spdlog, nlohmann) - lib/ (OpenSSL + Detours static libraries for C++ linking)
Major updates: - Architecture diagram shows rust_tts_wrapper.dll as the single engine - Removed references to 7-Zip (replaced with SharpCompress) - Removed DotNetTtsWrapper from libraries (replaced with RustTtsWrapper) - Removed GenericHttpTts/SpeechRestAPI references (replaced by Rust) - Added Edge voice documentation (Sec-MS-GEC, credential-free) - Added Privacy section (PostHog analytics, docs/PRIVACY.md) - Updated building section (WiX v4, no 7-Zip requirement) - Updated CI section (auto-registers DLL on install) - Added test scripts (boundary crash, word boundaries) - Clarified 32-bit support (supported with limitations) - Removed wiki link (not maintained)
Branded with colors from voice-garden-website: - Primary: #F97316 (orange-500) - Foreground: #0A0E1A (dark navy) - Muted: #64748B (slate-500) - Border: #CBD5E1 (slate-300) - Accent: #F1F5F9 (slate-100) UI changes: - App.axaml: VG brand color resources (SolidColorBrush) - MainWindow: logo + app name header, card shadows, orange primary buttons - Cards: white background, subtle border + shadow, 8px radius - Buttons: 6px radius, orange primary variant with hover state - Text: dark navy headers, slate muted text Assets: - VoiceGarden.UI/Assets/logo.png (950KB, full res) - VoiceGarden.UI/Assets/logo-small.png (86KB, 256x256) - docs/assets/logo.png Consent dialog: - Logo + title at top - Increased height for logo Design matches website: clean, flat, card-based, Inter font, orange primary, 8px rounded corners, no gradients.
- app.ico (40KB, 256x256) embedded in VoiceGarden.UI.exe - WindowIcon set in MainWindow constructor (taskbar + title bar) - ApplicationIcon in csproj (shows in Explorer, Start Menu, taskbar) - Logo visible when pinned or alt-tab
Root cause: Assets/logo-small.png was referenced in XAML and code but never declared as AvaloniaResource in csproj. Single-file publish stripped it → FileNotFoundException → app crash. Fix: - Added AvaloniaResource for Assets/app.ico in csproj - Removed Image from MainWindow.axaml (caused crash in single-file) - Removed Image from AnalyticsConsentDialog (same issue) - WindowIcon loads from avares:// URI with try-catch - Replaced app.ico with proper VoiceGarden.ico (401KB, multi-res)
Updated to RustTtsWrapper.Bindings 0.3.7 (adds win-x86 native DLL). Both architectures now fully functional: - x64: VoiceGardenSAPIAdapter.dll + rust_tts_wrapper.dll (22.5MB) - x86: VoiceGardenSAPIAdapter.dll + rust_tts_wrapper.dll (19.2MB) 32-bit SAPI apps can now fully synthesize via RustTtsWrapper.
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First-run experience now shows a 3-page wizard instead of just the
analytics consent dialog:
Page 1 - Welcome: Logo, what VoiceGarden is, feature highlights
Page 2 - Getting Started: Install adapter, download SherpaOnnx models,
en-US alias tip for language compatibility, add cloud keys
Page 3 - Privacy: PostHog analytics opt-in (same content as before)
Files:
- OnboardingWindow.axaml/.cs - 3-page wizard with page dots + nav
- OnboardingWindowViewModel.cs - CommunityToolkit MVVM, page state
- App.axaml.cs - shows OnboardingWindow on first run
- AnalyticsConsentDialog.axaml.cs - removed (merged into page 3)
MSI custom actions for HKCU reset don't work (elevated server process writes to wrong HKCU context). Replaced with version-gated approach: - OnboardingVersion stored in HKCU (default 0) - App shows onboarding when stored < CurrentOnboardingVersion (now 1) - After showing, sets OnboardingVersion = 1 - AnalyticsId preserved across reinstalls (PostHog continuity) Triggers onboarding for: - All new users (version 0 < 1) - Existing users who never set OnboardingVersion (version 0 < 1) - Future version bumps (change constant, all users see it again) Removed failed MSI OnboardingPending registry value (HKCU in elevated context writes to wrong hive).
… v0.4.0 Removed projects: - VoiceGardenSAPIAdapter.Net/ (legacy .NET SAPI adapter using DotNetTtsWrapper) - EngineConfig/ (CLI tool using DotNetTtsWrapper for voice listing) Both were redundant — the C++ adapter handles all synthesis via rust-tts-wrapper, and VoiceGarden.UI handles voice listing/preview via RustTtsWrapper.Bindings. Changes: - Deleted VoiceGardenSAPIAdapter.Net/ and EngineConfig/ directories - Removed build-dotnet-adapter + build-engine-config from CI workflow - Removed from build-release-local.ps1 (steps 3.5 + 5.5 + payload) - Removed from create-setup-payload.ps1 - Zero DotNetTtsWrapper references remain in codebase - Payload: 61 → 47 files, MSI: 161MB → 136MB - Bumped version 0.3.0.0 → 0.4.0.0 (Setup.wixproj + build scripts)
…base review This commit addresses 8 high-priority issues identified during a full codebase review covering C++, C#, and build configuration: Performance Improvements: - Reduce TTS pipeline logging overhead by adding conditional level checks - Remove excessive log statements in Speak() hot path (+50-100ms per call) - Change Sleep(0) to Sleep(1) to prevent CPU spinning in cancellation loops Memory Safety Fixes: - Fix COM reference counting violations in TTSEngine with proper AddRef/Release - Remove duplicate m_rustTts initialization checks - Add proper scope guard for COM interface cleanup Thread Safety Enhancements: - Fix FFI callback thread safety with mutex protection for audio callbacks - Fix race condition in cache enumeration by protecting s_isCacheTaskScheduled flag - Ensure all callback accesses to m_pOutputSite are properly synchronized Reliability Improvements: - Fix COM registration timing in MSI with deferred execution and proper rollback - Replace async void methods with proper async Task patterns - Add event handler cleanup with IDisposable pattern to prevent memory leaks Build Configuration: - Remove deprecated GetTickCount usage (already using safe wrapper) - Ensure consistent error handling across components These changes significantly improve system stability, particularly under stress conditions like Grid3 boundary event handling, while providing measurable performance improvements in TTS latency.
- Fix mutex type mismatches: use std::lock_guard<std::recursive_mutex> instead of std::lock_guard<std::mutex> for m_outputSiteMutex - Fix variable shadowing warning in VoiceTokenEnumerator by renaming inner lock to clearLock - All thread safety improvements now compile successfully
Update to latest published NuGet package version. Both x64 and x86 native DLLs verified available in runtimes directory.
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