video.h

嵌入式LINUX的智能家居系统源码

/**-******************************************************************************************
 *class :	video
 *description:	this class is on the board DOOR,it reads the net eye scanner,and write it on the
 *		can bus.And this cache hold only one line of the whole graph.but it tranports
 *		the data to the KERNEL MODULE in which the data is stored the whole graph for 
 *		each cache
 *version:	0.01
 *author:	YslayerY
 *begain_date:	2008-7-21
 *finish_date:	??
 *modify_times:
 *******************************************************************************************/



#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include <linux/videodev.h>
#include <sys/ioctl.h>
#include <libgen.h>
#include<pthread.h>

#include <fcntl.h>

#include <sys/mman.h>
#include<getopt.h>

#include<qtimer.h>

#include"configure.h"


#include"font.h"
// video-jpeg

#include<jpeglib.h>
#include<sys/mman.h>
#include<sys/types.h>


#define CAN_DEV  "/dev/can/0"

///definations
#define ERR_FRAME_BUFFER 1
#define ERR_VIDEO_OPEN  2
#define ERR_VIDEO_GCAP  3
#define ERR_VIDEO_GPIC  4
#define ERR_VIDEO_SPIC  5
#define ERR_SYNC     6
#define ERR_FRAME_USING   7
#define ERR_GET_FRAME     8


#define V4L_FILE	"/dev/v4l/video0"
#define JpegFileName  "shot.jpeg"
#define  FRAME_SIZE    16*160*120/8

/*
	this class use a timer to timely read v4l,and diff last image ,if differece is big enough,then it compress the image to jpeg
	and signal a video_transmitor class to transmit this jpeg image
	*/

struct	v4l
{
///vedio for linux 
   int fd;
   struct video_capability  capability;
   struct video_buffer    buffer;
   struct video_window    window;
   struct video_channel   channel[8];
   struct video_picture   picture;
   struct video_tuner    tuner;
   struct video_audio    audio[8];
   struct video_mmap     mmap;
   struct video_mbuf     mbuf;
   unsigned char  *map;
   int frame_current;//what 's the frame number being captured currently?
   int frame_using[2];
};




class video  : public QObject
{
	Q_OBJECT
public:
	video();
	~video();

public slots:

//this is the video control part
	int shut_video();
	int restart_video(int time = 1000);

signals:
	void signal_video_need_trans();

	void signal_video_detect_mov();
//this is the video controling functions 
public:
//this is the can part
//	int write_can(short * image);
	
	int open_video(int,int,int,int);
	int start_video();
	unsigned char * get_frame_address();
	int get_grab_frame(int frame);
	int get_first_frame();
	int get_next_frame();
// this is the video-jpeg part
	int putImageJpeg(char * fileName,unsigned char * mem,int quality);
	int proc_img(RGB24 * r,unsigned char * buf,int sx,int sy);
	int cmp_blks(RGB24 * a,RGB24 * b,int num,int depth,int c_limit,int b_limit);
	
public slots:
	void read_video_write_jpeg();
private:	
	v4l  vd;
	int stop;
	
	QTimer timer;
	pthread_cond_t   write_OK;
	
	RGB24 color[DEFAULT_BLK_X*DEFAULT_BLK_Y*2];
	int which;
//	this is the jpeg compress part

	int color_diff_ts;	/* default color diff threshold */
    int hotblk_ts;
};