我们需要关注的是两个核心方法的调用:uvc_get_device_with_fd、uvc_open。其中uvc_get_device_with_fd方法是根据从Java层传入的vendorId和productId来寻找设备,如果找到该设备则继续调用uvc_open来开启设备。当开启成功后紧接着又做了一堆初始化工作,其中包括了创建UVCPreview类。该类封装了预览宽高、帧率、带宽、...
if (uvc_ctrl_init_device(dev) < 0)---对解析出来的控制进行初始化。 gotoerror; /* Scan the device for video chains. */ if (uvc_scan_device(dev) < 0)---uvc扫描视频链。 gotoerror; /* Register video device nodes. */ if (uvc_register_chains(dev) < 0)---注册视频链设备。 gotoerr...
在内核根目录下输入: make menuconfig 进入图形界面 进入: Device Drivers –> Multimedia support –> Media USB Adapters USB Video Class (UVC) 这个选项按空格,选择" M " 退出保存图形界面 执行: make ARCH=arm CROSS_COMP... 查看原文 mjpg-streamer的移植和使用 ...
A window manager is available Device information: Device path: /dev/video0 Stream settings: Frame format: YUYV Frame size: 640x360(requested size 640x480 is not supported by device) Frame rate: 15 fps (requested frame rate 30 fps is not supported by device) I don't config the size...
set_last_error(hDevice, errno); goto done; } value->value = v4l2_ctrl.value; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. VIDIOC_S_CTRL和VIDIOC_G_CTRL的解释详见如下链接,一个用于设置参数,一个用于获取参数。
intstartControlPanTilt(intcontrolId,intvalue){//getControlValue(controlId);__android_log_print(ANDROID_LOG_ERROR,TAG,"start controlId = %d , value = %d",controlId,value);//jint setBefore;if(fd<0){__android_log_print(ANDROID_LOG_ERROR,TAG,"device open fail");return-1;}structv4l2_cont...
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case UVC_GET_LEN: resp->data[0] = 0x00; resp->data[1] = 0x22; resp->length = 2; break; case UVC_GET_INFO: resp->data[0] = 0x03; resp->length = 1; break; } } static void uvc_events_process_class(struct uvc_device *dev, struct usb_ctrlrequest *ctrl, ...
filter = DeviceFilter.getDeviceFilters(mContext, device_filter_id); if (filter.size() > 0){ item = mUSBMonitor.getDeviceList(filter.get(0)); if (item.size() > 0){ for(int i=0; i< item.size(); i++) { for (int c=0; c<8; c++) ...
一、内核配置 UVC 1、进入 linux 源码目录,执行 make menuconfig 2、Device Drivers -> USB support 按照下图进行配置 输出识别的每个usb设备的基本信息...uvc-streamer:目录下提供了 uvc-streamer 的可执行目录。 udp_client:udp 输出的客户端。...mjpeg-client:分别有 linux 和 windows 的客户端。.../lib ...