/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2019, Google Inc. * * v4l2_camera.h - V4L2 compatibility camera */ #ifndef __V4L2_CAMERA_H__ #define __V4L2_CAMERA_H__ #include <deque> #include <mutex> #include <utility> #include <libcamera/buffer.h> #include <libcamera/camera.h> #include <libcamera/file_descriptor.h> #include <libcamera/framebuffer_allocator.h> #include "semaphore.h" using namespace libcamera; class V4L2Camera { public: struct Buffer { Buffer(unsigned int index, const FrameMetadata &data) : index(index), data(data) { } unsigned int index; FrameMetadata data; }; V4L2Camera(std::shared_ptr<Camera> camera); ~V4L2Camera(); int open(); void close(); void getStreamConfig(StreamConfiguration *streamConfig); std::vector<Buffer> completedBuffers(); int configure(StreamConfiguration *streamConfigOut, const Size &size, PixelFormat pixelformat, unsigned int bufferCount); int allocBuffers(unsigned int count); void freeBuffers(); FileDescriptor getBufferFd(unsigned int index); int streamOn(); int streamOff(); int qbuf(unsigned int index); Semaphore bufferSema_; private: void requestComplete(Request *request); std::shared_ptr<Camera> camera_; std::unique_ptr<CameraConfiguration> config_; bool isRunning_; std::mutex bufferLock_; FrameBufferAllocator *bufferAllocator_; std::deque<std::unique_ptr<Request>> pendingRequests_; std::deque<std::unique_ptr<Buffer>> completedBuffers_; }; #endif /* __V4L2_CAMERA_H__ */