OpenHarmony5.0.2 USB摄像头适配_openharmony usb摄像头
开发环境
OpenHarmony5.0.2 RK3568
USB摄像头
遇到问题
编译后插上USB摄像头后打开相机无图像
解决思路
5.0.2版本是支持USB摄像头的，需要修改默认的板载相机配置即可。
修改代码
1、修改HCS配置
文件地址：vendor/hihope/rk3568/hdf_config/uhdf/camera/hdi_impl/camera_host_config.hcs
删除ability_01 :: ability {}
2、删除缓存后编译
修改hcs后编译时可能会有缓存，最后先在代码根目录下执行下面的命令后再编译。
find ./out -type f -name \"*.hcb\" -exec rm -v {} \\;
find ./out -type f -name \"*.cfg\" -exec rm -v {} \\;
3、调试排查步骤
linux安装v4l2-ctl查看USB摄像头支持的格式
/dev$ sudo v4l2-ctl -d video0 --list-formatsioctl: VIDIOC_ENUM_FMTIndex : 0Type : Video CapturePixel Format: \'MJPG\' (compressed)Name : Motion-JPEGIndex : 1Type : Video CapturePixel Format: \'YUYV\'Name : YUYV 4:2:2Windows 环境安装AMCap查看摄像头支持格式
查看插入的串口日志包含USB Camera
插入串口日志[ 4245.564927] usb 5-1.3: new high-speed USB device number 13 using xhci-hcd[ 4245.685701] usb 5-1.3: New USB device found, idVendor=0bda, idProduct=5b05, bcdDevice= 0.00[ 4245.685741] usb 5-1.3: New USB device strings: Mfr=3, Product=1, SerialNumber=2[ 4245.685751] usb 5-1.3: Product: USB Camera[ 4245.685759] usb 5-1.3: Manufacturer: Generic[ 4245.685767] usb 5-1.3: SerialNumber: 200901010001[ 4245.687188] [AUTH_CTRL] no auth data for this pid = 578[ 4245.687188] , tgid[ 4245.687199] [QOS_CTRL] do_qos_ctrl_ioctl: pid not authorized[ 4245.745061] uvcvideo: Found UVC 1.00 device USB Camera (0bda:5b05)[ 4245.757268] [I/USB_PNP_NOTIFY] UsbPnpNotifyCallback: action=0x1[ 4245.757323] [I/USB_PNP_NOTIFY] UsbPnpNotifyAddInitInfo:209 i=0, interfaceInfo=0xe-0x1-0x0-0x0[ 4245.757335] [I/USB_PNP_NOTIFY] UsbPnpNotifyAddInitInfo:209 i=1, interfaceInfo=0xe-0x2-0x0-0x1[ 4245.757377] [I/USB_PNP_NOTIFY] UsbPnpNotifyReportThread: UsbPnpNotifyReportThread start![ 4245.757409] [I/USB_PNP_NOTIFY] UsbPnpNotifyHdfSendEvent:375 device information, 3 usbDevAddr=18446743525960148992, devNum=13, busNum=5, infoTable=2-0xbda-0x5b05![ 4245.777467] [AUTH_CTRL] no auth data for this pid = 643确定Linux 内核UVC协议已生效以及USB UVC camera被识别
# lsusbBus 005 Device 001: ID 1d6b:0002Bus 003 Device 001: ID 1d6b:0001Bus 001 Device 001: ID 1d6b:0002Bus 005 Device 013: ID 0bda:5b05Bus 005 Device 007: ID 34d1:0608Bus 006 Device 001: ID 1d6b:0003Bus 004 Device 001: ID 1d6b:0001Bus 002 Device 001: ID 1d6b:0002Bus 005 Device 008: ID 0000:3825Bus 003 Device 002: ID 34d1:0608查看USB设备信息
cat /sys/kernel/debug/usb/devicesT: Bus=05 Lev=02 Prnt=07 Port=02 Cnt=01 Dev#= 13 Spd=480 MxCh= 0D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1P: Vendor=0bda ProdID=5b05 Rev= 0.00S: Manufacturer=GenericS: Product=USB CameraS: SerialNumber=200901010001C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mAA: FirstIf#= 0 IfCount= 2 Cls=0e(video) Sub=03 Prot=00I:* If#= 0 Alt= 0 #EPs= 1 Cls=0e(video) Sub=01 Prot=00 Driver=uvcvideoE: Ad=83(I) Atr=03(Int.) MxPS= 16 Ivl=4msI:* If#= 1 Alt= 0 #EPs= 0 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideoI: If#= 1 Alt= 1 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideoE: Ad=81(I) Atr=05(Isoc) MxPS= 128 Ivl=125usI: If#= 1 Alt= 2 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideoE: Ad=81(I) Atr=05(Isoc) MxPS= 512 Ivl=125usI: If#= 1 Alt= 3 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideoE: Ad=81(I) Atr=05(Isoc) MxPS=1024 Ivl=125usI: If#= 1 Alt= 4 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideoE: Ad=81(I) Atr=05(Isoc) MxPS=1536 Ivl=125usI: If#= 1 Alt= 5 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideoE: Ad=81(I) Atr=05(Isoc) MxPS=2048 Ivl=125usI: If#= 1 Alt= 6 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideoE: Ad=81(I) Atr=05(Isoc) MxPS=2688 Ivl=125usI: If#= 1 Alt= 7 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideoE: Ad=81(I) Atr=05(Isoc) MxPS=3072 Ivl=125u查看节点信息是否新增video9和video10
# ls -l /dev/video*crw-rw---- 1 camera_host camera_host 81, 0 2017-08-05 17:03 /dev/video0crw-rw---- 1 camera_host camera_host 81, 1 2017-08-05 17:03 /dev/video1crw-rw---- 1 camera_host camera_host 81, 13 2017-08-05 17:04 /dev/video10crw-rw---- 1 camera_host camera_host 81, 2 2017-08-05 17:03 /dev/video2crw-rw---- 1 camera_host camera_host 81, 3 2017-08-05 17:03 /dev/video3crw-rw---- 1 camera_host camera_host 81, 4 2017-08-05 17:03 /dev/video4crw-rw---- 1 camera_host camera_host 81, 5 2017-08-05 17:03 /dev/video5crw-rw---- 1 camera_host camera_host 81, 6 2017-08-05 17:03 /dev/video6crw-rw---- 1 camera_host camera_host 81, 7 2017-08-05 17:03 /dev/video7crw-rw---- 1 camera_host camera_host 81, 8 2017-08-05 17:03 /dev/video8crw-rw---- 1 camera_host camera_host 81, 12 2017-08-05 17:04 /dev/video9开启CameraDumper排查采集的数据格式
参考网站：
Camera HDI调试工具 - CameraDumper_DarkKnight888-Laval社区
其他板载相机适配可参考
OpenHarmony USB UVC camera 适配说明_kgduwu-Laval社区
5、相机图片视频分辨率大小设置
文件位置：
applications/standard/camera/common/src/main/ets/default/camera/CameraService.ts
如果你使用的系统应用的话，可以尝试改改应用，在cameraService.ts文件里面，把
createPreviewOutput() createPhotoOutput() createVideoOutput()
三个函数里面的 previewProfile 后面获取的数组下标，从0改成1 先试下。
可以先在createCameraInput（）函数里面，把 outputCapability 输出能力 先打印出来
this.outputCapability = this.mCameraManager.getSupportedOutputCapability();// 打印设备支持的分辨率Log.info(`${TAG} createCameraInput previewProfiles = ${JSON.stringify(this.outputCapability.previewProfiles)}`);Log.info(`${TAG} createCameraInput photoProfiles = ${JSON.stringify(this.outputCapability.photoProfiles)}`);Log.info(`${TAG} createCameraInput videoProfiles = ${JSON.stringify(this.outputCapability.videoProfiles)}`);注意：APP的源码需要在DevEco Studio 软件中修改编译后放到SDK中编译，SDK直接改源码不生效，是打包的hap，可以本地修改后直接安装到板子测试效果。
本地需要安装full SDK 请参考如下链接
OpenHarmony Full SDK的安装 - 文章 OpenHarmony开发者论坛
