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;
}
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;
}