/*
 * Copyright 2012, Blender Foundation.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor:
 *		Jeroen Bakker
 *		Monique Dewanchand
 *		Sergey Sharybin
 */

#include "COM_TrackPositionOperation.h"

#include "MEM_guardedalloc.h"

#include "BLI_listbase.h"
#include "BLI_math.h"
#include "BLI_math_color.h"

extern "C" {
	#include "BKE_movieclip.h"
	#include "BKE_tracking.h"
}

TrackPositionOperation::TrackPositionOperation() : NodeOperation()
{
	this->addOutputSocket(COM_DT_VALUE);
	this->m_movieClip = NULL;
	this->m_framenumber = 0;
	this->m_trackingObjectName[0] = 0;
	this->m_trackName[0] = 0;
	this->m_axis = 0;
	this->m_position = POSITION_ABSOLUTE;
	this->m_relativeFrame = 0;
}

void TrackPositionOperation::initExecution()
{
	MovieTracking *tracking = NULL;
	MovieClipUser user = {0};
	MovieTrackingObject *object;

	zero_v2(this->m_markerPos);
	zero_v2(this->m_relativePos);

	if (!this->m_movieClip)
		return;

	tracking = &this->m_movieClip->tracking;

	BKE_movieclip_user_set_frame(&user, this->m_framenumber);
	BKE_movieclip_get_size(this->m_movieClip, &user, &this->m_width, &this->m_height);

	object = BKE_tracking_object_get_named(tracking, this->m_trackingObjectName);
	if (object) {
		MovieTrackingTrack *track;

		track = BKE_tracking_track_get_named(tracking, object, this->m_trackName);

		if (track) {
			MovieTrackingMarker *marker;
			int clip_framenr = BKE_movieclip_remap_scene_to_clip_frame(this->m_movieClip, this->m_framenumber);

			marker = BKE_tracking_marker_get(track, clip_framenr);

			copy_v2_v2(this->m_markerPos, marker->pos);

			if (this->m_position == POSITION_RELATIVE_START) {
				int i;

				for (i = 0; i < track->markersnr; i++) {
					marker = &track->markers[i];

					if ((marker->flag & MARKER_DISABLED) == 0) {
						copy_v2_v2(this->m_relativePos, marker->pos);

						break;
					}
				}
			}
			else if (this->m_position == POSITION_RELATIVE_FRAME) {
				int relative_clip_framenr = BKE_movieclip_remap_scene_to_clip_frame(this->m_movieClip,
				                                                                    this->m_relativeFrame);

				marker = BKE_tracking_marker_get(track, relative_clip_framenr);
				copy_v2_v2(this->m_relativePos, marker->pos);
			}
		}
	}
}

void TrackPositionOperation::executePixel(float output[4], float x, float y, PixelSampler sampler)
{
	output[0] = this->m_markerPos[this->m_axis] - this->m_relativePos[this->m_axis];

	if (this->m_axis == 0)
		output[0] *= this->m_width;
	else
		output[0] *= this->m_height;
}

void TrackPositionOperation::determineResolution(unsigned int resolution[2], unsigned int preferredResolution[2])
{
	resolution[0] = preferredResolution[0];
	resolution[1] = preferredResolution[1];
}
