demo.git/src/audio/backend, branch main

style: apply clang-format

2026-05-21T06:10:47Z

fix: code review cleanup — bugs, dead code, factorization (-167 lines)

2026-05-20T20:44:44Z

Bugs: - B1: fix dead tempo debug (prev_tempo captured after assignment) - B2: fix ReloadAssetsFromFile leak for disk-loaded assets; simplify DropAsset - B3: fix get_free_pool_slot leak (unregister synth + free data on reuse) - B4: volatile -> std::atomic with acquire/release in miniaudio_backend, synth - B5: fix unaligned reads in scene_loader (memcpy-based read_f32/read_u32) - B6: fix shader module + BGL + pipeline layout leaks in gpu.cc, pipeline_builder Dead code: - D1: remove unused particle_defs.h - D3: remove create_post_process_pipeline_simple (zero callers) - D4: remove empty gpu_draw() - D5: remove write-only Hybrid3D::initialized_ - D6: remove legacy pending buffer path in audio.cc Factorization: - F1: Effect::run_fullscreen_pass() replaces boilerplate in 5 effects - F2: particle_common.wgsl snippet, #include in 3 WGSL shaders - F3: gpu_create_shader_module() helper, used in 3 call sites - F5: get_world_aabb() shared between bvh.cc and physics.cc - F6: samples_to_seconds() replaces 6 inline expressions - F7: gpu_create_linear/nearest_sampler use SamplerCache; add nearest() preset 37/37 tests passing. handoff(Claude): code review batch — all items verified, no regressions.

style: Apply clang-format

2026-02-17T07:16:03Z

fix: use low-latency profile for regular Core Audio callbacks

2026-02-17T06:33:32Z

Switches miniaudio from conservative to low_latency performance profile to fix irregular beat timing on macOS. Conservative profile caused uneven callback intervals, desynchronizing playback. Co-Authored-By: Claude Sonnet 4.5

fix(build): add missing headers and enum casts for strict compilation

2026-02-16T14:05:01Z

Co-Authored-By: Claude Sonnet 4.5

refactor: invert FATAL_CHECK logic to standard assertion style

2026-02-16T11:52:07Z

- Inverted FATAL_CHECK macro to crash if condition is FALSE (standard assertion) - Updated all call sites in audio, GPU, and CNN subsystems - Updated documentation and examples - Recorded completion in doc/COMPLETED.md

perf(audio): smooth playback time and RMS-based peak at 60Hz

2026-02-15T22:56:43Z

Interpolates audio playback time between callbacks using CLOCK_MONOTONIC for smooth 60Hz updates instead of coarse 8-10Hz steps. Replaces artificial peak decay with true RMS calculation over 50ms window. Ring buffer computes RMS directly on internal buffer without copies for efficiency. All backends updated with get_callback_state() interface for time interpolation. Tests passing (34/34). Co-Authored-By: Claude Sonnet 4.5

fix: WAV dump header corruption and early exit handling

2026-02-12T00:07:31Z

- wav_dump_backend: Fix data_size double-counting channels (line 126) - test_wav_dump: Assert on data_size validation instead of warning - main: Add SIGINT/SIGTERM handlers to finalize WAV on Ctrl+C - Guard signal handler code with DEMO_HEADLESS ifdef Co-Authored-By: Claude Sonnet 4.5

style: Apply clang-format to all source files

2026-02-08T06:40:29Z

fix(audio): Synchronize audio-visual timing with playback time

2026-02-07T15:41:30Z

Problem: test_demo was "flashing a lot" - visual effects triggered ~400ms before audio was heard, causing poor synchronization. Root Causes: 1. Beat calculation used physical time (platform_state.time), but audio peak measured at playback time (400ms behind due to ring buffer) 2. Peak decay too slow (0.7 per callback = 800ms fade) relative to beat interval (500ms at 120 BPM) Solution: 1. Use audio_get_playback_time() for beat calculation - Automatically accounts for ring buffer latency - No hardcoded constants (was considering hardcoding 400ms offset) - System queries its own state 2. Faster decay rate (0.5 vs 0.7) to match beat interval 3. Added inline PeakMeterEffect for visual debugging Changes: - src/test_demo.cc: - Added inline PeakMeterEffect class (red bar visualization) - Use audio_get_playback_time() instead of physical time for beat calc - Updated logging to show audio time - src/audio/backend/miniaudio_backend.cc: - Changed decay rate from 0.7 to 0.5 (500ms fade time) - src/gpu/gpu.{h,cc}: - Added gpu_add_custom_effect() API for runtime effect injection - Exposed g_device, g_queue, g_format as non-static globals - doc/PEAK_METER_DEBUG.md: - Initial analysis of timing issues - doc/AUDIO_TIMING_ARCHITECTURE.md: - Comprehensive architecture documentation - Time source hierarchy (physical → audio playback → music) - Future work: TimeProvider class, tracker_get_bpm() API Architectural Principle: Single source of truth - platform_get_time() is the only physical clock. Everything else derives from it. No hardcoded latency constants. Result: Visual effects now sync perfectly with heard audio.