v4l2 android hal
时间: 2023-10-30 12:49:03 浏览: 212
V4L2 (Video for Linux 2) is a Linux kernel API that provides standardized access to video capturing and playback devices. The Android operating system uses V4L2 extensively for camera support, and the Android camera subsystem provides a V4L2-compatible interface for camera HAL (Hardware Abstraction Layer) modules.
The V4L2 Android HAL is the component responsible for interfacing the Android camera subsystem with the V4L2 kernel API. It provides a set of abstracted interfaces and functions for camera HAL modules to communicate with the underlying V4L2 driver.
The V4L2 Android HAL can be implemented as a standalone module or integrated into the camera HAL module. It provides a set of standardized operations, such as device enumeration, device opening and closing, buffer allocation, and buffer queueing.
The V4L2 Android HAL is an essential component for Android camera support and plays a critical role in ensuring that camera HAL modules can communicate with the underlying V4L2 driver in a standardized and predictable way.
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