feat: WASAPI driver — Pure Go audio output (ADR-001, v0.1.0) - #1
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Working Windows audio output through WASAPI shared mode. Zero CGO. Architecture: - internal/wasapi/ — COM vtable structs, driver implementation - wasapiWrapper in audio/ adapts internal driver to public interface - Pull model: background goroutine reads from Mixer via ReadFloat32er - Event-driven: WaitForSingleObject on WASAPI buffer events WASAPI flow: CoInitializeEx → MMDeviceEnumerator → GetDefaultAudioEndpoint → IAudioClient.Initialize(SHARED, AUTOCONVERTPCM) → IAudioRenderClient → audio loop (GetBuffer → fill from Mixer → ReleaseBuffer) Fixes: - AUDCLNT_E_UNSUPPORTED_FORMAT (0x88890008): added AUTOCONVERTPCM + SRC_DEFAULT_QUALITY flags — WASAPI handles format conversion - Tests use NullDriver explicitly (no real audio device in CI) - Driver interface refined: pull model with ReadFloat32er Verified: 440Hz sine wave plays through speakers on Windows. 42 tests pass, lint 0 issues (Windows/Linux/macOS).
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Summary
First working release of gogpu/audio — Pure Go audio engine with WASAPI driver.
WASAPI Driver (Windows)
syscall.SyscallN(same pattern as wgpu DX12 backend)ReadFloat32erinternal/wasapi/hides COM implementation from public APICore
Verified
Test plan
go build ./...go test ./...— 42 passgolangci-lint run— 0 issues (3 platforms)