#pragma once
#include <string>
#include <vector>
#include <mutex>

#define LOG_TRACE(s)	utils::to_log(LOG_LEVEL_DEBUG, s.c_str())
#define LOG_ERROR		LOG_TRACE

class gVideo
{
public:
	gVideo();
	virtual ~gVideo();

	bool is_open();
	void close();
	void open(int width, int height);
	void start();
	void stop();
	void grab(int color, bool bcrrect = false, int timeout = 1000, int flatpara = 0);
	bool hasframe();
	virtual void *read_frame(int timeout, size_t& size, int& ind);	// call add_v4l2_memory to put the buffer into the V4L2 queue again
	int add_v4l2_memory(int ind);
	int get_mem_count(void);
	void set_size(int width, int height);

protected:
	bool wait(int msTimeout);

	virtual void stop_capturing(void);
	virtual void start_capturing(void);
	void uninit_device(void);
	virtual void init_mmap(void);
	virtual void init_device(void);
	void close_device(void);
	void open_device(void);


	struct buffer
	{
		void *start;
		size_t length;
	};

	const int v4l_buffer_count = 5;
	int buf_size_ = 0;
	int v4l_width = 3100;
	int v4l_height = 3100;
	std::string dev_name;
	int fd;
	std::vector<buffer> buffers;
	unsigned int n_buffers;
	std::mutex m_lock;
	volatile bool bStart;
};