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Reorganized platform windowing code into dedicated subdirectory for
better organization and consistency with other subsystems (audio/, gpu/, 3d/).
Changes:
- Created src/platform/ directory
- Moved src/platform.{h,cc} → src/platform/platform.{h,cc}
- Updated 11 include paths: "platform.h" → "platform/platform.h"
- src/main.cc, src/test_demo.cc
- src/gpu/gpu.{h,cc}
- src/platform/platform.cc (self-include)
- 6 test files
- Updated CMakeLists.txt PLATFORM_SOURCES variable
Verification:
✓ All targets build successfully (demo64k, test_demo, test_platform)
✓ test_platform passes (70% coverage maintained)
✓ demo64k smoke test passed
This completes the platform code reorganization side quest.
No functional changes, purely organizational.
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Adds error handling for unknown or invalid command-line options:
- Unknown options (e.g., --invalid) print error and help, then exit(1)
- Missing arguments (e.g., --resolution without WxH) print error and help
- Invalid format (e.g., --resolution abc) print error and help
Error handling:
- Prints specific error message to stderr
- Shows full help text for reference
- Exits with status code 1 (error)
- --help still exits with status code 0 (success)
Examples of new behavior:
$ test_demo --unknown
Error: Unknown option '--unknown'
[help text displayed]
$ test_demo --resolution
Error: --resolution requires an argument (e.g., 1024x768)
[help text displayed]
$ test_demo --resolution abc
Error: Invalid resolution format 'abc' (expected WxH, e.g., 1024x768)
[help text displayed]
This prevents silent failures and helps users discover correct usage.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Adds beat_number as 4th column in fine-grained logging mode to enable
easy correlation between frame-level data and beat boundaries.
File format change:
- Before: frame_number clock_time raw_peak
- After: frame_number clock_time raw_peak beat_number
Benefits:
- Correlate frame-level peaks with specific beats
- Filter or group data by beat in analysis scripts
- Easier comparison between beat-aligned and fine-grained logs
- Identify which frames belong to each beat interval
Example output:
0 0.000000 0.850000 0
1 0.016667 0.845231 0
...
30 0.500000 0.720000 1
31 0.516667 0.715234 1
This allows filtering like: awk '$4 == 0' peaks_fine.txt
to extract all frames from beat 0.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Adds --log-peaks-fine option to log audio peaks at every frame (~60 Hz)
instead of just at beat boundaries, enabling millisecond-resolution
synchronization analysis.
Features:
- --log-peaks-fine flag for per-frame logging
- Logs ~960 samples over 16 seconds (vs 32 for beat-aligned)
- Header indicates logging mode (beat-aligned vs fine)
- Frame number instead of beat number in fine mode
- Updated gnuplot command (using column 2 for time)
Use cases:
- Millisecond-resolution synchronization debugging
- Frame-level timing jitter detection
- Audio envelope analysis (attack/decay characteristics)
- Sub-beat artifact identification
Example usage:
build/test_demo --log-peaks peaks.txt --log-peaks-fine
The fine mode provides approximately 16.67ms resolution (60 Hz) compared
to 500ms resolution (beat boundaries at 120 BPM).
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Implements minimal standalone executable for debugging audio/visual
synchronization and variable tempo system without full demo complexity.
Key Features:
- Simple drum beat (kick-snare) with crash landmarks at bars 3 and 7
- NOTE_A4 (440 Hz) reference tone at start of each bar for testing
- Screen flash effect synchronized to audio peaks
- 16 second duration (8 bars at 120 BPM)
- Variable tempo mode (--tempo) alternating acceleration/deceleration
- Peak logging (--log-peaks) for gnuplot visualization
Command-line options:
- --help: Show usage information
- --fullscreen: Run in fullscreen mode
- --resolution WxH: Set window resolution
- --tempo: Enable tempo variation test (1.0x ↔ 1.5x and 1.0x ↔ 0.66x)
- --log-peaks FILE: Export audio peaks with beat timing for analysis
Files:
- src/test_demo.cc: Main executable (~220 lines)
- assets/test_demo.track: Drum pattern with NOTE_A4
- assets/test_demo.seq: Visual timeline (FlashEffect)
- test_demo_README.md: Comprehensive documentation
Build: cmake --build build --target test_demo
Usage: build/test_demo [--help] [--tempo] [--log-peaks peaks.txt]
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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