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/* 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 <linux/videodev2.h>
#include <mutex>
#include <libcamera/buffer.h>
#include <libcamera/camera.h>
#include <libcamera/file_descriptor.h>
#include "semaphore.h"
using namespace libcamera;
class V4L2FrameMetadata
{
public:
V4L2FrameMetadata(Buffer *buffer);
int index() const { return index_; }
unsigned int bytesused() const { return bytesused_; }
uint64_t timestamp() const { return timestamp_; }
unsigned int sequence() const { return sequence_; }
Buffer::Status status() const { return status_; }
private:
int index_;
unsigned int bytesused_;
uint64_t timestamp_;
unsigned int sequence_;
Buffer::Status status_;
};
class V4L2Camera : public Object
{
public:
V4L2Camera(std::shared_ptr<Camera> camera);
~V4L2Camera();
int open();
void close();
void getStreamConfig(StreamConfiguration *streamConfig);
std::vector<V4L2FrameMetadata> 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_;
std::deque<std::unique_ptr<Request>> pendingRequests_;
std::deque<std::unique_ptr<V4L2FrameMetadata>> completedBuffers_;
};
#endif /* __V4L2_CAMERA_H__ */
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