One-KVM/libs/v4l2r

Rust bindings for V4L2

This is a vendored, One-KVM-specific subset of v4l2r.

It keeps only the pieces needed for video capture:

• generated Linux V4L2 bindings,
• safe low-level ioctl wrappers used by capture and device probing,
• memory handle helpers for MMAP, USERPTR, and DMABUF,
• core V4L2 types such as Format, PixelFormat, and QueueType.

The upstream crate also contains high-level device abstractions, stateful decoder/encoder helpers, stateless codec controls, examples, and C FFI. Those parts are intentionally removed here so this dependency stays scoped to capture.

Build options

cargo build generates V4L2 bindings from the vendored Linux UAPI headers in include/.

For Android targets, the build script uses the Android NDK sysroot. Set one of ANDROID_NDK_HOME, ANDROID_NDK_ROOT, NDK_HOME, ANDROID_HOME, or ANDROID_SDK_ROOT if the NDK cannot be found automatically.