v4l2_ctrl_new_std(hdl, &skel_ctrl_ops, V4L2_CID_SATURATION, 0, 255, 1, 127); v4l2_ctrl_new_std(hdl, &skel_ctrl_ops, V4L2_CID_HUE, -128, 127, 1, 0); if (hdl->error) { ret = hdl->error; goto free_hdl; } skel->v4l2_dev.ctrl_handler = hdl; 10、设置vb2相关参数并初始...
structfoo_dev{...structv4l2_subdevsd;...structv4l2_ctrl_handlerctrl_handler;... }; foo->sd.ctrl_handler = &foo->ctrl_handler; 3.1.6.1.3 控件操作API 初始化和删除控件控制器 v4l2_ctrl_handler_init(&foo->ctrl_handler, nr_of_controls);v4l2_ctrl_handler_free(&foo->ctrl_handler); 添加控...
v4l2_ctrl_new_std_menu(&foo->ctrl_handler,&foo_ctrl_ops,V4L2_CID_POWER_LINE_FREQUENCY,V4L2_CID_POWER_LINE_FREQUENCY_60HZ,0,V4L2_CID_POWER_LINE_FREQUENCY_DISABLED); ...if(foo->ctrl_handler.error){int err=foo->ctrl_handler.error; v4l2_ctrl_handler_free(&foo->ctrl_handler);returnerr;}...
v4l2_fh_del(&my_fh->fh); v4l2_fh_exit(&my_fh->fh); kfree(my_fh); return 0; } 二、常用操作struct v4l2_fh的API接口 (1)初始化文件句柄: v4l2_fh_init (fh, vdev) 该函数必须在驱动程序的v4l2_file_operations->open()处理程序中执行。 (2)将v4l2_fh添加到video_device的文件处理...
struct v4l2_ctrl_handler hdl; v4l2_std_id std; }; 1. 2. 3. 4. 5. v4l2_device与V4L2框架的绑定:通过调用v4l2_device_register函数实现。例如,上面提到的soc_camera_host的绑定: AI检测代码解析 int soc_camera_host_register(struct soc_camera_host *ici) ...
(ret)goto free_dev;dev->fmt=&formats[0];dev->width=640;dev->height=480;hdl=&dev->ctrl_handler;v4l2_ctrl_handler_init(hdl,11);dev->volume=v4l2_ctrl_new_std(hdl,&vivi_ctrl_ops,V4L2_CID_AUDIO_VOLUME,0,255,1,200);dev->brightness=v4l2_ctrl_new_std(hdl,&vivi_ctrl_ops,V4L2_CID_...
struct v4l2_ctrl_handler *ctrl_handler; /* 名字必须是唯一 */ char name[V4L2_SUBDEV_NAME_SIZE]; /* 可用于到类似subdevs组,值是驱动程序特定的 */ u32 grp_id; /* 私有数据的指针 */ void *dev_priv; void *host_priv; /* subdev 设备节点*/ ...
v4l2_ctrl_handler_init(&v4l2_flash->hdl, num_ctrls);for (i = 0; i < NUM_FLASH_CTRLS; ++i) { ctrl_cfg = &ctrl_init_data[i].config; if (!ctrl_init_data[i].cid) continue;if (ctrl_cfg->id == V4L2_CID_FLASH_LED_MODE ||...
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...
.vidioc_s_ctrl = vidioc_s_ctrl, }; static struct file_operations camif_fops = { .owner = THIS_MODULE, .open = camif_open, .release = camif_release, .read = camif_read, .poll = camif_poll, .ioctl = video_ioctl2, /* V4L2 ioctl handler */ ...