C++ (Cpp) media_pipeline_start Examples

Example #1

File: fimc-isp-video.c Project: AlexShiLucky/linux

static int isp_video_streamon(struct file *file, void *priv,
				      enum v4l2_buf_type type)
{
	struct fimc_isp *isp = video_drvdata(file);
	struct exynos_video_entity *ve = &isp->video_capture.ve;
	struct media_entity *me = &ve->vdev.entity;
	int ret;

	ret = media_pipeline_start(me, &ve->pipe->mp);
	if (ret < 0)
		return ret;

	ret = isp_video_pipeline_validate(isp);
	if (ret < 0)
		goto p_stop;

	ret = vb2_ioctl_streamon(file, priv, type);
	if (ret < 0)
		goto p_stop;

	isp->video_capture.streaming = 1;
	return 0;
p_stop:
	media_pipeline_stop(me);
	return ret;
}

Example #2

File: camss-video.c Project: ReneNyffenegger/linux

static int video_start_streaming(struct vb2_queue *q, unsigned int count)
{
	struct camss_video *video = vb2_get_drv_priv(q);
	struct video_device *vdev = &video->vdev;
	struct media_entity *entity;
	struct media_pad *pad;
	struct v4l2_subdev *subdev;
	int ret;

	ret = media_pipeline_start(&vdev->entity, &video->pipe);
	if (ret < 0)
		return ret;

	ret = video_check_format(video);
	if (ret < 0)
		goto error;

	entity = &vdev->entity;
	while (1) {
		pad = &entity->pads[0];
		if (!(pad->flags & MEDIA_PAD_FL_SINK))
			break;

		pad = media_entity_remote_pad(pad);
		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
			break;

		entity = pad->entity;
		subdev = media_entity_to_v4l2_subdev(entity);

		ret = v4l2_subdev_call(subdev, video, s_stream, 1);
		if (ret < 0 && ret != -ENOIOCTLCMD)
			goto error;
	}

	return 0;

error:
	media_pipeline_stop(&vdev->entity);

	video->ops->flush_buffers(video, VB2_BUF_STATE_QUEUED);

	return ret;
}