From a6a7bf0440dbabdc6c994c0fb21a8ac31c27be07 Mon Sep 17 00:00:00 2001 From: skal Date: Sat, 7 Feb 2026 14:00:23 +0100 Subject: feat(audio): Add SilentBackend, fix peak measurement, reorganize backends MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit ## Critical Fixes **Peak Measurement Timing:** - Fixed 400ms audio-visual desync by measuring peak at playback time - Added get_realtime_peak() to AudioBackend interface - Implemented real-time measurement in MiniaudioBackend audio callback - Updated main.cc and test_demo.cc to use audio_get_realtime_peak() **Peak Decay Rate:** - Fixed slow decay (0.95 → 0.7 per callback) - Old: 5.76 seconds to fade to 10% (constant flashing in test_demo) - New: 1.15 seconds to fade to 10% (proper visual sync) ## New Features **SilentBackend:** - Test-only backend for testing audio.cc without hardware - Controllable peak for testing edge cases - Tracks frames rendered and voice triggers - Added 7 comprehensive tests covering: - Lifecycle (init/start/shutdown) - Peak control and tracking - Playback time and buffer management - Integration with AudioEngine ## Refactoring **Backend Organization:** - Created src/audio/backend/ directory - Moved all backend implementations to subdirectory - Updated include paths and CMakeLists.txt - Cleaner codebase structure **Code Cleanup:** - Removed unused register_spec_asset() function - Added deprecation note to synth_get_output_peak() ## Testing - All 28 tests passing (100%) - New test: test_silent_backend - Improved audio.cc test coverage significantly ## Documentation - Created PEAK_FIX_SUMMARY.md with technical details - Created TASKS_SUMMARY.md with complete task report Co-Authored-By: Claude Sonnet 4.5 --- src/test_demo.cc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'src/test_demo.cc') diff --git a/src/test_demo.cc b/src/test_demo.cc index 0d6be0a..c26e65a 100644 --- a/src/test_demo.cc +++ b/src/test_demo.cc @@ -201,7 +201,8 @@ int main(int argc, char** argv) { // Audio/visual sync parameters const float aspect_ratio = platform_state.aspect_ratio; - const float raw_peak = synth_get_output_peak(); + // Use real-time peak for proper audio-visual synchronization + const float raw_peak = audio_get_realtime_peak(); const float visual_peak = fminf(raw_peak * 8.0f, 1.0f); // Beat calculation (hardcoded BPM=120) -- cgit v1.2.3