src/v4l2/v4l2_camera_proxy.h


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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * v4l2_camera_proxy.h - Proxy to V4L2 compatibility camera
 */

#ifndef __V4L2_CAMERA_PROXY_H__
#define __V4L2_CAMERA_PROXY_H__

#include <linux/videodev2.h>
#include <map>
#include <memory>
#include <set>
#include <sys/mman.h>
#include <sys/types.h>
#include <vector>

#include <libcamera/camera.h>

#include "v4l2_camera.h"

using namespace libcamera;

class V4L2CameraFile;

class V4L2CameraProxy
{
public:
	V4L2CameraProxy(unsigned int index, std::shared_ptr<Camera> camera);

	int open(V4L2CameraFile *file);
	void close(V4L2CameraFile *file);
	void *mmap(void *addr, size_t length, int prot, int flags, off64_t offset);
	int munmap(void *addr, size_t length);

	int ioctl(V4L2CameraFile *file, unsigned long request, void *arg);

private:
	bool validateBufferType(uint32_t type);
	bool validateMemoryType(uint32_t memory);
	void setFmtFromConfig(const StreamConfiguration &streamConfig);
	void querycap(std::shared_ptr<Camera> camera);
	int tryFormat(struct v4l2_format *arg);
	enum v4l2_priority maxPriority();