(struct v4l2_subdev *sd, struct tuner_setup *type); int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config); }; struct v4l2_subdev_audio_ops { int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq); int (*s_i2s_clock_freq)(struct v4l2_subdev *sd,...
v4l2_ctrl_handler_init(&foo->ctrl_handler,nr_of_controls); v4l2_ctrl_new_std(&foo->ctrl_handler,&foo_ctrl_ops,V4L2_CID_BRIGHTNESS,0,255,1,128); v4l2_ctrl_new_std(&foo->ctrl_handler,&foo_ctrl_ops,V4L2_CID_CONTRAST,0,255,1,128); v4l2_ctrl_new_std_menu(&foo->ctrl_handler,&foo...
int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl, struct v4l2_ctrl_handler *add, v4l2_ctrl_filter filter)把@add中所有的控制变量都添加到@hdl中.int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)此API的调用时可选的. 每个控制变量都是自己的默认值, 此API的目的是把所有控制变量...
2.vfd->v4l2_dev = &dev->v4l2_dev; 3.设置"ctrl属性"(用于APP的ioctl) v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vid_cap); v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vid_out); ... video_register_device(video_device, type:VFL_TYPE_GRABBER, nr) __video_register_device vdev->cdev = cdev...
v4l2_fh是用来保存子设备的特有操作方法,也就是下面要分析到的v4l2_ctrl_handler,内核提供一组v4l2_fh的操作方法,通常在打开设备节点时进行v4l2_fh注册。 AI检测代码解析 // kernel_imx/include/media/v4l2-fh.h /** * struct v4l2_fh - Describes a V4L2 file handler * * @list: list of file handlers...
(hdl,&vivi_ctrl_menu,NULL);dev->string=v4l2_ctrl_new_custom(hdl,&vivi_ctrl_string,NULL);dev->bitmask=v4l2_ctrl_new_custom(hdl,&vivi_ctrl_bitmask,NULL);if(hdl->error){ret=hdl->error;goto unreg_dev;}v4l2_ctrl_auto_cluster(2,&dev->autogain,0,true);dev->v4l2_dev.ctrl_handler=hdl...
struct v4l2_ctrl_handler *hdl; struct vb2_queue *q; // 分配一个 vivi_dev 结构体 dev = kzalloc(sizeof(*dev), GFP_KERNEL); // v4l2_dev 初始化,并没有什么作用 ret = v4l2_device_register(NULL, &dev->v4l2_dev); // 设置 dev 的一些参数,比如图像格式、大小 ...
Device-tree Changes Define devnode field on the specific VI port node: / { ... host1x {/* VI Setup */vi@15700000{ ports { port@0{ reg = <0>; camera_vi_in0: endpoint { devnode ="video1";/* V4L2 Device name as preferred by the user */port-index = <4>; vc-id = <0>;...
问在设置V4L2处理程序后添加自定义V4L2控件ENV4L2英文全称是Video for Linux2，它是专门为视频设备设计的...
v4l2_ctrl_handler_setup(&v4l2_flash->hdl);v4l2_flash->sd.ctrl_handler = &v4l2_flash->hdl;return 0;error_free_handler: v4l2_ctrl_handler_free(&v4l2_flash->hdl); return ret; }static int __sync_device_with_v4l2_controls(struct v4l2_flash *v4l2_flash)...