中星微ZC301摄像头的V4L图像采集

采用中星微ZC301摄像头的V4L图像采集

/**********v4l.h*******************

/*name :v4l.h

  date:2009-5-20

  author:kevin

  copyright:all is reserved

**************************/

#ifndef _V4L_H_
#define _V4L_H_

#include <linux/videodev.h>
#include <sys/types.h>
//PAL CIF NTSC tuner mode
#define PAL_WIDTH 768  
#define PAL_HEIGHT 576 
#define CIF_WIDTH 352 
#define CIF_HEIGHT 288 
#define NTSC_WIDTH 80  //设置获取图像的大小 
#define NTSC_HEIGHT 60 
#define DEFAULT_PALETTE VIDEO_PALETTE_RGB32 

struct _v4l_device
{

    int fd;//设备号
    struct video_capability capability;//摄像头属性
    struct video_picture picture;//图像的属性，亮度、色度、对比度、灰度、编码属性
    struct video_window window;//包含capture area 的信息
    struct video_channel channel[8];//采集的通道
    struct video_mbuf mbuf;//利用mmap映射得侦信息
    struct video_capture capture;
    struct video_buffer buffer;
    struct video_mmap mmap;
    unsigned char *map;
    int frame;
    int framestat[2]; 
};
typedef struct _v4l_device v4ldevice;

extern int v4l_open(char *,v4ldevice *);
extern int v4l_set_norm(v4ldevice *, int);
extern int v4l_get_capability(v4ldevice *);
extern int v4l_get_window(v4ldevice *);
extern int v4l_set_window(v4ldevice *);
extern int v4l_get_picture(v4ldevice *);
extern int v4l_mmap_init(v4ldevice *);
extern int v4l_grab_init(v4ldevice *,int ,int);
extern int v4l_grab_start(v4ldevice *,int );
extern int v4l_grab_sync(v4ldevice *,int);
extern int v4l_get_capture(v4ldevice *);//,int);
extern int v4l_set_capture(v4ldevice *);//,int);
extern unsigned char *v4l_get_address(v4ldevice *);
extern int v4l_close(v4ldevice *);
extern void set(v4ldevice *);