参照元†
- struct uvc_device *dev
- struct uvc_streaming *stream
返り値†
static int uvc_register_video(struct uvc_device *dev,
struct uvc_streaming *stream)
{
struct video_device *vdev = &stream->vdev;
int ret;
/* Initialize the video buffers queue. */
ret = uvc_queue_init(&stream->queue, stream->type, !uvc_no_drop_param);
if (ret)
return ret;
/* Initialize the streaming interface with default streaming
* parameters.
*/
ret = uvc_video_init(stream);
if (ret < 0) {
uvc_printk(KERN_ERR, "Failed to initialize the device "
"(%d).\n", ret);
return ret;
}
uvc_debugfs_init_stream(stream);
/* Register the device with V4L. */
/* We already hold a reference to dev->udev. The video device will be
* unregistered before the reference is released, so we don't need to
* get another one.
*/
vdev->v4l2_dev = &dev->vdev;
vdev->fops = &uvc_fops;
vdev->ioctl_ops = &uvc_ioctl_ops;
vdev->release = uvc_release;
vdev->prio = &stream->chain->prio;
if (stream->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
vdev->vfl_dir = VFL_DIR_TX;
strlcpy(vdev->name, dev->name, sizeof vdev->name);
/* Set the driver data before calling video_register_device, otherwise
* uvc_v4l2_open might race us.
*/
video_set_drvdata(vdev, stream);
ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
if (ret < 0) {
uvc_printk(KERN_ERR, "Failed to register video device (%d).\n",
ret);
return ret;
}
if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE;
else
stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
atomic_inc(&dev->nstreams);
return 0;
}
コメント†