Ejemplos de GstImxBlitterVideoTransformClass::stop en C++ (Cpp)

Ejemplo n.º 1

Archivo: blitter_video_transform.c Proyecto: merics/gstreamer-imx

static GstStateChangeReturn gst_imx_blitter_video_transform_change_state(GstElement *element, GstStateChange transition)
{
	GstImxBlitterVideoTransform *blitter_video_transform = GST_IMX_BLITTER_VIDEO_TRANSFORM(element);
	GstImxBlitterVideoTransformClass *klass = GST_IMX_BLITTER_VIDEO_TRANSFORM_CLASS(G_OBJECT_GET_CLASS(element));
	GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;

	g_assert(blitter_video_transform != NULL);
	g_assert(klass->start != NULL);

	switch (transition)
	{
		case GST_STATE_CHANGE_NULL_TO_READY:
		{
			GST_IMX_BLITTER_VIDEO_TRANSFORM_LOCK(blitter_video_transform);

			blitter_video_transform->initialized = TRUE;

			if (!(klass->start(blitter_video_transform)))
			{
				GST_ERROR_OBJECT(blitter_video_transform, "start() failed");
				blitter_video_transform->initialized = FALSE;
				GST_IMX_BLITTER_VIDEO_TRANSFORM_UNLOCK(blitter_video_transform);
				return GST_STATE_CHANGE_FAILURE;
			}

			/* start() must call gst_imx_blitter_video_transform_set_blitter(),
			 * otherwise the video transform element cannot function properly */
			g_assert(blitter_video_transform->blitter != NULL);

			gst_imx_base_blitter_enable_crop(blitter_video_transform->blitter, blitter_video_transform->input_crop);

			GST_IMX_BLITTER_VIDEO_TRANSFORM_UNLOCK(blitter_video_transform);

			break;
		}

		default:
			break;
	}

	ret = GST_ELEMENT_CLASS(gst_imx_blitter_video_transform_parent_class)->change_state(element, transition);
	if (ret == GST_STATE_CHANGE_FAILURE)
		return ret;

	switch (transition)
	{
		case GST_STATE_CHANGE_READY_TO_NULL:
		{
			GST_IMX_BLITTER_VIDEO_TRANSFORM_LOCK(blitter_video_transform);

			blitter_video_transform->initialized = FALSE;

			if ((klass->stop != NULL) && !(klass->stop(blitter_video_transform)))
				GST_ERROR_OBJECT(blitter_video_transform, "stop() failed");

			GST_IMX_BLITTER_VIDEO_TRANSFORM_UNLOCK(blitter_video_transform);

			if (blitter_video_transform->blitter != NULL)
			{
				gst_object_unref(GST_OBJECT(blitter_video_transform->blitter));
				blitter_video_transform->blitter = NULL;
			}

			break;
		}

		default:
			break;
	}

	return ret;
}

Ejemplo n.º 2

Archivo: video_transform.c Proyecto: gale320/gstreamer-imx

static GstStateChangeReturn gst_imx_blitter_video_transform_change_state(GstElement *element, GstStateChange transition)
{
	GstImxBlitterVideoTransform *blitter_video_transform = GST_IMX_BLITTER_VIDEO_TRANSFORM(element);
	GstImxBlitterVideoTransformClass *klass = GST_IMX_BLITTER_VIDEO_TRANSFORM_CLASS(G_OBJECT_GET_CLASS(element));
	GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;

	g_assert(blitter_video_transform != NULL);

	switch (transition)
	{
		case GST_STATE_CHANGE_NULL_TO_READY:
		{
			GST_IMX_BLITTER_VIDEO_TRANSFORM_LOCK(blitter_video_transform);

			blitter_video_transform->initialized = TRUE;

			if ((klass->start != NULL) && !(klass->start(blitter_video_transform)))
			{
				GST_ERROR_OBJECT(blitter_video_transform, "start() failed");
				blitter_video_transform->initialized = FALSE;
				GST_IMX_BLITTER_VIDEO_TRANSFORM_UNLOCK(blitter_video_transform);
				return GST_STATE_CHANGE_FAILURE;
			}

			if (!gst_imx_blitter_video_transform_acquire_blitter(blitter_video_transform))
			{
				GST_ERROR_OBJECT(blitter_video_transform, "acquiring blitter failed");
				GST_IMX_BLITTER_VIDEO_TRANSFORM_UNLOCK(blitter_video_transform);
				return GST_STATE_CHANGE_FAILURE;
			}

			GST_IMX_BLITTER_VIDEO_TRANSFORM_UNLOCK(blitter_video_transform);

			break;
		}

		default:
			break;
	}

	ret = GST_ELEMENT_CLASS(gst_imx_blitter_video_transform_parent_class)->change_state(element, transition);
	if (ret == GST_STATE_CHANGE_FAILURE)
		return ret;

	switch (transition)
	{
		case GST_STATE_CHANGE_PAUSED_TO_READY:
		{
			GST_IMX_BLITTER_VIDEO_TRANSFORM_LOCK(blitter_video_transform);
			blitter_video_transform->last_frame_with_cropdata = FALSE;
			GST_IMX_BLITTER_VIDEO_TRANSFORM_UNLOCK(blitter_video_transform);
			break;
		}

		case GST_STATE_CHANGE_READY_TO_NULL:
		{
			GST_IMX_BLITTER_VIDEO_TRANSFORM_LOCK(blitter_video_transform);

			blitter_video_transform->initialized = FALSE;

			if ((klass->stop != NULL) && !(klass->stop(blitter_video_transform)))
				GST_ERROR_OBJECT(blitter_video_transform, "stop() failed");

			if (blitter_video_transform->blitter != NULL)
			{
				gst_object_unref(GST_OBJECT(blitter_video_transform->blitter));
				blitter_video_transform->blitter = NULL;
			}

			GST_IMX_BLITTER_VIDEO_TRANSFORM_UNLOCK(blitter_video_transform);

			break;
		}

		default:
			break;
	}

	return ret;
}