From c4888bea71326f7a69e8214af0d9c2a62a60b887 Mon Sep 17 00:00:00 2001 From: skal Date: Wed, 4 Feb 2026 13:08:13 +0100 Subject: feat(audio): Implement audio backend abstraction (Task #51.1) Created interface-based audio backend system to enable testing without hardware. This is the foundation for robust tracker timing verification. Changes: - Created AudioBackend interface with init/start/shutdown methods - Added test-only hooks: on_voice_triggered() and on_frames_rendered() - Moved miniaudio implementation to MiniaudioBackend class - Refactored audio.cc to use backend abstraction with auto-fallback - Added time tracking to synth.cc (elapsed time from rendered frames) - Created test_audio_backend.cc to verify backend injection works - Fixed audio test linking to include util/procedural dependencies All test infrastructure guarded by #if !defined(STRIP_ALL) for zero size impact on final build. Production path unchanged, 100% backward compatible. All 13 tests pass. handoff(Claude): Task #51.1 complete, audio backend abstraction ready Co-Authored-By: Claude Sonnet 4.5 --- src/audio/audio.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'src/audio/audio.h') diff --git a/src/audio/audio.h b/src/audio/audio.h index a1ddb44..52ad103 100644 --- a/src/audio/audio.h +++ b/src/audio/audio.h @@ -6,6 +6,9 @@ #include "generated/assets.h" #include +// Forward declaration for backend abstraction +class AudioBackend; + struct SpecHeader { char magic[4]; int32_t version; @@ -17,7 +20,10 @@ void audio_init(); void audio_start(); // Starts the audio device callback #if !defined(STRIP_ALL) void audio_render_silent(float duration_sec); // Fast-forwards audio state -#endif /* !defined(STRIP_ALL) */ +// Backend injection for testing +void audio_set_backend(AudioBackend* backend); +AudioBackend* audio_get_backend(); +#endif /* !defined(STRIP_ALL) */ void audio_update(); void audio_shutdown(); -- cgit v1.2.3