Isolating Lock Screen and Session Interference
Redefined responsibility boundaries across the audio session, lock screen remote control, and effector state to eliminate cross-component interference in the playback path.
Playback is not confined to a single screen. The lock screen remote control, background audio session, and sound effectors operating over video all reference the same playback state simultaneously. When each component modifies state based on independent assumptions, subtle conflicts accumulate that are difficult to trace. The objective of this work was to narrow those boundaries and enforce clear ownership for each component.
The primary issue was the propagation scope of effector attachment state. Spatial and reverb effectors are only relevant in flows where the user has those features active. Broadcasting this state across the entire session caused unnecessary interference even when the feature was not in use. Effector state is now scoped exclusively to the paths where it applies, and audio session management was updated to distinguish user types clearly, blocking unintended cross-session effects.
Initial launch performance was also addressed. Preemptive image processing on the first screen was removed, and data loading was reordered to prioritize essential content. Concurrent load counts for the video feed were capped to reduce memory pressure.
Playback reliability derives from well-defined component boundaries, not from individual feature additions. The measure of success for this work was consistent playback state across all entry points — lock screen controls, headphone reconnection, and external audio interrupts.