Inside the Android Camera Stack: What Actually Breaks in Production
1. The Real End-to-End Pipeline At a high level, the Android camera stack looks simple: Application → Framework → CameraService → HAL → ISP → Sensor But what matters is not the layers — it’s the fact that every boundary is asynchronous. Requests are pipelined. Results are asynchronous. Multiple frames are in-flight simultaneously. By the time a shutter press occurs, several preview frames may already be queued inside the ISP pipeline. This is why camera systems behave like streaming systems — not function calls. 2. The Request/Result Boundary (HAL3 Mode
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