示例#1
0
文件: v4l.c 项目: suzp1984/parrot
int v4l_grab_init(v4l_device* vd, int width, int height)
{
	vd->mmap.width = width;
	vd->mmap.height = height;
	vd->mmap.format = vd->picture.palette;
	vd->frame_current = 0;
	vd->frame_using[0] = FALSE;
	vd->frame_using[1] = FALSE;

	return v4l_grab_frame(vd, 0);
}
示例#2
0
/*********************************************************************
* 函数名: v4l_grab_movie
* 功  能:捕获连续图像
*/
void  v4l_grab_movie(v4l_device *vd)
 {
    #ifdef DEBUG_PRINT
   {
      //     printf("video_mbuf include size=%u,frame=%d,offdet=%d\n", \
      //         vd->mbuf.size, vd->mbuf.frames, vd->mbuf.offsets[1]);
          // printf("Hello \n") ;
   }
     #endif
     
     v4l_grab_frame(vd, vd->frame_current);      /*获取下一 帧*/
     v4l_grab_sync(vd);                                     /*等待传完一 帧*/
     vd->buffer = v4l_get_address(vd);              /*得到这一帧的地址*/
     vd->frame_current = (vd->frame_current+1)%2; /* 下一帧的frame*/
    
 }