{"record":{"id":"6442091285858b22","repo":"Zackriya-Solutions/meetily","slug":"failed-to-create-wasapi-host","errorCode":null,"errorMessage":"Failed to create WASAPI host: {}","messagePattern":"Failed to create WASAPI host: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"frontend/src-tauri/src/audio/devices/platform/windows.rs","lineNumber":99,"sourceCode":"        }\n\n        // Try to add default output device\n        if let Some(device) = host.default_output_device() {\n            if let Ok(name) = device.name() {\n                // info!(\"Adding default output device: {}\", name);\n                devices.push(AudioDevice::new(name, DeviceType::Output));\n            }\n        }\n    }\n\n    debug!(\"Found {} Windows audio devices\", devices.len());\n    Ok(devices)\n}\n\n/// Get Windows device and configuration using WASAPI\npub fn get_windows_device(audio_device: &AudioDevice) -> Result<(cpal::Device, cpal::SupportedStreamConfig)> {\n    let wasapi_host = cpal::host_from_id(cpal::HostId::Wasapi)\n        .map_err(|e| anyhow!(\"Failed to create WASAPI host: {}\", e))?;\n\n    // Extract the base device name without the (input) or (output) suffix\n    let base_name = if audio_device.name.ends_with(\" (input)\") {\n        audio_device.name.trim_end_matches(\" (input)\")\n    } else if audio_device.name.ends_with(\" (output)\") {\n        audio_device.name.trim_end_matches(\" (output)\")\n    } else {\n        &audio_device.name\n    };\n\n    info!(\"Looking for Windows device with base name: {}\", base_name);\n\n    match audio_device.device_type {\n        DeviceType::Input => {\n            for device in wasapi_host.input_devices()? {\n                if let Ok(name) = device.name() {\n                    info!(\"Checking input device: {}\", name);\n                    // Check if the device name contains our base name","sourceCodeStart":81,"sourceCodeEnd":117,"githubUrl":"https://github.com/Zackriya-Solutions/meetily/blob/0281737d87d26352fb0adc78c8c0975f691b23d1/frontend/src-tauri/src/audio/devices/platform/windows.rs#L81-L117","documentation":"get_windows_device (windows.rs:99) requests the WASAPI host explicitly via cpal::host_from_id(HostId::Wasapi) and that call failed. On Windows the app pins WASAPI for both capture and loopback instead of the implicit default host. host_from_id fails when the cpal build does not include the WASAPI backend (feature flags) or the host cannot be initialized in this process/session.","triggerScenarios":"A build compiled for a non-Windows target or with cpal wasapi feature disabled (build script misconfiguration, wrong --target); calling the Windows path from a context where COM/audio services are unavailable (Windows audio service stopped, early service-session startup, sandboxed service account). Rare on stock Windows 10/11 where WASAPI is always present.","commonSituations":"CI cross-compilation dropping the wasapi feature; custom cargo build with --no-default-features; Windows Audio service (Audiosrv) disabled for hardening; running the binary as a service before the audio endpoint is ready; Wine/Proton environments with partial WASAPI emulation.","solutions":["Confirm the error text after the colon - a host-not-found/initialized message from cpal pinpoints the feature/init issue.","Rebuild with the default Windows feature set (pnpm run tauri:build, or cargo build) without --no-default-features; verify cpal is not pinned to a stripped version in Cargo.lock.","If the Windows Audio service is disabled: sc config Audiosrv start= auto, start it, relaunch the app.","Run the app as a normal interactive user session, not as a service/SYSTEM.","Keep this module behind #[cfg(target_os = \"windows\")] at the call site so it never executes off-Windows."],"exampleFix":"# before: custom stripped build drops the wasapi backend\ncargo build --no-default-features\n\n# after: build with platform default features so HostId::Wasapi resolves\ncargo build   # or: pnpm run tauri:build","handlingStrategy":"validation","validationCode":"// Compile-time guard: never execute the WASAPI path off-Windows or without the backend\n#[cfg(all(target_os = \"windows\", feature = \"wasapi\"))]\nfn resolve_device(d: &AudioDevice) -> Result<(cpal::Device, cpal::SupportedStreamConfig)> {\n    get_windows_device(d)\n}","typeGuard":null,"tryCatchPattern":"// Distinguish infrastructure failure from device failure so the UI can advise correctly\nmatch get_windows_device(&dev) {\n    Err(e) if e.to_string().starts_with(\"Failed to create WASAPI host\") => {\n        return Err(anyhow!(\"Audio backend unavailable - restart the Windows Audio service or reinstall the app\"));\n    }\n    other => other,\n}","preventionTips":["Build Windows binaries with default cargo features; never --no-default-features without auditing cpal.","Keep the Windows Audio service (Audiosrv) enabled on hardened machines.","Gate this module behind #[cfg(target_os = \"windows\")] so cross-target runs never reach it."],"tags":["windows","wasapi","cpal","build-features","audio-host"],"backgroundTag":"audio-host-unavailable","analyzedSha":"0281737d87d26352fb0adc78c8c0975f691b23d1","analyzedAt":"2026-08-16T20:57:52.567Z","schemaVersion":2},"datasetVersion":"2026-08-16T23:17:17.608Z"}