capture.h

嵌入式linux与arm板视频图像解析及静态图像对传

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

#include <linux/videodev.h>
#include <sys/ioctl.h>
extern "C"{
#include <jpeglib.h>   //在编译这个库的时候不能用C＋＋编译，所以指定为extern "C",让编译器知道调用的是c的库！
}
#include <dlfcn.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <setjmp.h>
#include <string.h>
#include <signal.h>
#include <errno.h>

#include <linux/fb.h>


typedef struct	_fb_v4l
{
    // FrameBuffer 
	int fbfd ;					// FrameBuffer��
	struct fb_var_screeninfo vinfo;		// FrameBuffer�Ļɱ��Ϣ
	struct fb_fix_screeninfo finfo;		// FrameBuffer̶��Ϣ
	char *fbp;					//FrameBuffer 
     
    // video device
	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;
	int frame_using[VIDEO_MAX_FRAME];
}fb_v41;

#define DEFAULT_PALETTE VIDEO_PALETTE_RGB565

#define FB_FILE "/dev/fb0"
#define V4L_FILE "/dev/video0"

#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 OUTPUT_BUF_SIZE  4096


typedef struct 
{
	struct jpeg_destination_mgr pub;

	unsigned char *outBuff;		
	JOCTET * buffer;		
 } my_destination_mgr;
typedef my_destination_mgr *my_dest_ptr;
 
 
void rgb_to_framebuffer( fb_v41 *,int,int, int,int,unsigned short  * );

int get_grab_frame(fb_v41 *, int);

int get_first_frame(fb_v41 *);

char *get_frame_address(fb_v41 *);

int get_next_frame(fb_v41 *);

int open_framebuffer(char *,fb_v41 *);

int open_video( char *,fb_v41 *,int,int,int,int);

void compress_to_jpeg_file( FILE *,char *,int,int, int);

void jpeg_buff_dest(j_compress_ptr );
void compress_Jpeg( unsigned char *, int, int, int,int, int);
unsigned char *jpegImg();
int jpegSize();

void exchange_r_b( char *,long);