Enable audio-reactive lighting on the Android-TV build. A push-based
AndroidAudioEngine captures system playback audio via AudioPlaybackCapture
(API 29+), reusing the existing MediaProjection token, and feeds PCM into
the unchanged AudioAnalyzer pipeline. No new Python deps; no Chaquopy/pip
changes (numpy already bundled).
- Python: android_audio_engine.py — module-level queue + configure/
push_samples/shutdown mirroring mediaprojection_engine; AndroidAudioEngine
(priority 100) registered behind a guarded import. push_samples copies and
defensively trims/clamps each block so the analyzer can't crash on
variable-length or non-frame-divisible PCM.
- Kotlin: AudioCapture.kt — AudioRecord + AudioPlaybackCaptureConfiguration,
fixed chunk-size block framing, little-endian float32, mic fallback;
reads back the actual negotiated channel/sample rate. PythonBridge gains
configureAudio/pushAudio/shutdownAudio with a cached module handle.
- Wiring: CaptureService starts/stops AudioCapture in the MediaProjection
path (gated on API>=29 + RECORD_AUDIO + live projection); MainActivity
requests RECORD_AUDIO; manifest declares it. Degrades gracefully when
denied; root path stays audio-less by design.
- Tests: 13 desktop-CI tests incl. an over-length/non-divisible regression
guard that exercises the full read_chunk -> AudioAnalyzer.analyze path.
alexei.dolgolyov
fd62db1720