vector<BufferUserPtr> buffers;private:v4l2_formatgetFormat();voidsetFormat(v4l2_format &format);int&fd;// 确保和构造函数传递进来的fd是同一个文件描述符v4l2_buf_type type; fstream file; }; Port::Port(int&fd, v4l2_buf_type type,constchar*filename) :pending(0),fd(fd),type(type) { ios:...
int v4l2_event_pending(struct v4l2_fh *fh){return fh->navailable;}EXPORT_SYMBOL_GPL(v4l2_event_pending);static void __v4l2_event_unsubscribe(struct v4l2_subscribed_event *sev){struct v4l2_fh *fh = sev->fh;unsigned int i;lockdep_assert_held(&fh->subscribe_lock);...
3.1.1 ov5640_dev structov5640_dev{structi2c_client*i2c_client;structv4l2_subdevsd;structmedia_padpad;structv4l2_fwnode_endpointep;/* the parsed DT endpoint info */structclk*xclk;/* system clock to OV5640 */u32 xclk_freq;structregulator_bulk_datasupplies[OV5640_NUM_SUPPLIES];structgpio_desc...
struct v4l2_fh *fh = file->private_data; if (v4l2_event_pending(fh)) res = POLLPRI; else if (req_events & POLLPRI) poll_wait(file, &fh->wait, wait); } return res | vb2_core_poll(q, file, wait); } EXPORT_SYMBOL_GPL(vb2_poll); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10....
(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { struct v4l2_fh *fh = file->private_data; if (v4l2_event_pending(fh)) res = POLLPRI; else if (req_events & POLLPRI) poll_wait(file, &fh->wait, wait); } return res | vb2_core_poll(q, file, wait); } EXPORT_SYMBOL_GPL(vb2_poll);...
[ 0.000000] trace event string verifier disabled [ 0.000000] rcu: Hierarchical RCU implementation. [ 0.000000] rcu: RCU event tracing is enabled. [ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=6. [ 0.000000] Rude variant of Tasks RCU enabled. ...
关于v4l2驱动的实现 lijierson8 访问：积分：等级：排名：目录视图摘要视图订阅 142616次 1838 第8985名 50篇49篇 原创：转载：
if (v4l2_event_pending(fh)) return POLLPRI;return 0; }const struct v4l2_file_operations v4l2_subdev_fops = { .owner = THIS_MODULE, .open = subdev_open, .unlocked_ioctl = subdev_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl32 = subdev_compat_ioctl32,...
(UN)SUBSCRIBE_EVENT/DQEVENT: OK test VIDIOC_G/S_JPEGCOMP: OK (Not Supported) Standard Controls: 1 Private Controls: 13 Format ioctls: test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK test VIDIOC_G/S_PARM: OK (Not Supported) test VIDIOC_G_FBUF: OK (Not Supported) test VIDIOC_G_FMT:...
How would I event listen for the event using v4l2r? I see subscribe_event but not a way to check for events. You can use ioctl::dqevent() to check if an event was pending and dequeue it. This can be adequate if you only use a single thread, but a better design is probably to ...