C++ (Cpp) fimc_capture_set_default_format示例

示例#1

static int fimc_capture_open(struct file *file)
{
	struct fimc_dev *fimc = video_drvdata(file);
	int ret = -EBUSY;

	dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);

	if (mutex_lock_interruptible(&fimc->lock))
		return -ERESTARTSYS;

	if (fimc_m2m_active(fimc))
		goto unlock;

	set_bit(ST_CAPT_BUSY, &fimc->state);
	ret = pm_runtime_get_sync(&fimc->pdev->dev);
	if (ret < 0)
		goto unlock;

	ret = v4l2_fh_open(file);
	if (ret) {
		pm_runtime_put(&fimc->pdev->dev);
		goto unlock;
	}

	if (++fimc->vid_cap.refcnt == 1) {
		ret = fimc_pipeline_call(fimc, open, &fimc->pipeline,
					 &fimc->vid_cap.vfd.entity, true);

		if (!ret && !fimc->vid_cap.user_subdev_api)
			ret = fimc_capture_set_default_format(fimc);

		if (!ret)
			ret = fimc_capture_ctrls_create(fimc);

		if (ret < 0) {
			clear_bit(ST_CAPT_BUSY, &fimc->state);
			pm_runtime_put_sync(&fimc->pdev->dev);
			fimc->vid_cap.refcnt--;
			v4l2_fh_release(file);
		}
	}
unlock:
	mutex_unlock(&fimc->lock);
	return ret;
}

示例#2

文件： fimc-capture.c 项目： artynet/linux-3.3.8

static int fimc_capture_open(struct file *file)
{
	struct fimc_dev *fimc = video_drvdata(file);
	int ret = v4l2_fh_open(file);

	if (ret)
		return ret;

	dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);

	/* Return if the corresponding video mem2mem node is already opened. */
	if (fimc_m2m_active(fimc))
		return -EBUSY;

	set_bit(ST_CAPT_BUSY, &fimc->state);
	pm_runtime_get_sync(&fimc->pdev->dev);

	if (++fimc->vid_cap.refcnt == 1) {
		ret = fimc_pipeline_initialize(fimc,
			       &fimc->vid_cap.vfd->entity, true);
		if (ret < 0) {
			dev_err(&fimc->pdev->dev,
				"Video pipeline initialization failed\n");
			pm_runtime_put_sync(&fimc->pdev->dev);
			fimc->vid_cap.refcnt--;
			v4l2_fh_release(file);
			clear_bit(ST_CAPT_BUSY, &fimc->state);
			return ret;
		}
		ret = fimc_capture_ctrls_create(fimc);

		if (!ret && !fimc->vid_cap.user_subdev_api)
			ret = fimc_capture_set_default_format(fimc);
	}
	return ret;
}