如果是INFO_FL_FUNC会先调用到v4l2自己实现的标准回调函数,然后根据arg再调用到video_device->v4l2_ioctl_ops或v4l2_fh->v4l2_ctrl_handler函数集。 四、用户空间访问 camera & 示例程序 /** V4L2 video capture example * * This program can be used and distributed without restrictions. * * This program ...
测试步骤如下1. gcc -o capture_image capture_image.c2. ctrl+alt+f1 切换到ubuntu的控制台,切换到控制台模式是因为在图形模式下看不到测试图形,这可能和framebuffer的设置有关3. sudo modprobe vivi4. sudo ./capture_image -d /dev/video0 这时可以看到在屏幕左上角有一个640x480大小窗口,内容是彩色条...
V4L2camera驱动capture测试程序 在网上找了一个测试程序, 看了看,是根据capture.c修改的。测试步骤如下 1. gcc -o capture_image capture_image.c 2. ctrl+alt+f1 切换到ubuntu的控制台,切换到控制台模式是因为在图形模式下看不到测试图形,这可能和framebuffer的设置有关 3. sudo modprobe vivi 4. sudo ./...
static int time_in_sec_capture=5; static int fbfd = -1; static struct fb_var_screeninfo vinfo; static struct fb_fix_screeninfo finfo; static char *fbp=NULL; static long screensize=0; static void errno_exit (const char * s) { fprintf (stderr, "%s error %d, %s/n",s,...
V4L2 camera 驱动 capture测试程序【转】 简介:转自:http://blog.csdn.net/kickxxx/article/details/6336346 在网上找了一个测试程序, 看了看,是根据capture.c修改的。测试步骤如下 1. 转自:http://blog.csdn.net/kickxxx/article/details/6336346
ret = camera.reqbufs_mmap(4);if(ret < 0)goto exit;/* TODO: Start stream capture */ ret =...
V4L2_CAP_VIDEO_CAPTURE // 是否⽀持图像获取 例：显⽰设备信息 struct v4l2_capability cap;ioctl(fd,VIDIOC_QUERYCAP,&cap);printf(“Driver Name:%s\nCard Name:%s\nBus info:%s\nDriver Version:%u.%u.%u\n”,cap.driver,cap.card,cap.bus_info,cap.capabilities);5. 设置视频的制式和帧格式 制式...
C++ 代码:创建一个名为CameraCapture.cpp的文件 #include<jni.h>#include<android/log.h>#include<opencv2/opencv.hpp>#defineLOGI(...)((void)__android_log_print(ANDROID_LOG_INFO,"CameraCapture",__VA_ARGS__))extern"C"JNIEXPORTvoidJNICALLJava_com_example_virtualcamera_CameraCapture_startCapture(JNI...
转载-V4L2 camera 驱动 capture 测试程序 原文 -http://blog.csdn.net/kickxxx/article/details/6336346[c-sharp] view plaincopy#include<stdio.h;#include<stdlib.h;#include<string.h;#include& lt;assert.h;#include<getopt.h;#include<fcntl.h;#include<unistd.h;#inclu de<errno.h;#include<sys/stat...
static bool camera_init(camera_t* camera) { struct v4l2_capability cap; if (xioctl(camera->fd, VIDIOC_QUERYCAP, &cap) == -1) return error(camera, "VIDIOC_QUERYCAP"); if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) return failure(camera, "no capture");...