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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
///////////////////////////////////////////////////
// Blend.h
// $Id: Blend.h,v 1.23 2011/06/24 04:22:14 mbansal Exp $
#ifndef BLEND_H
#define BLEND_H
#include "MosaicTypes.h"
#include "Pyramid.h"
#include "Delaunay.h"
#define BLEND_RANGE_DEFAULT 6
#define BORDER 8
// Percent of total mosaicing time spent on each of the following operations
const float TIME_PERCENT_ALIGN = 20.0;
const float TIME_PERCENT_BLEND = 75.0;
const float TIME_PERCENT_FINAL = 5.0;
// This threshold determines the minimum separation between the image centers
// of the input image frames for them to be accepted for blending in the
// STRIP_TYPE_WIDE mode.
const float STRIP_SEPARATION_THRESHOLD_PXLS = 10;
// This threshold determines the number of pixels on either side of the strip
// to cross-fade using the images contributing to each seam.
const float STRIP_CROSS_FADE_WIDTH_PXLS = 2;
// This specifies the maximum pyramid level to which cross-fading is applied.
// The original image resolution is Level-0, half of that size is Level-1 and
// so on. BLEND_RANGE_DEFAULT specifies the number of pyramid levels used by
// the blending algorithm.
const int STRIP_CROSS_FADE_MAX_PYR_LEVEL = 2;
/**
* Class for pyramid blending a mosaic.
*/
class Blend {
public:
static const int BLEND_TYPE_NONE = -1;
static const int BLEND_TYPE_FULL = 0;
static const int BLEND_TYPE_PAN = 1;
static const int BLEND_TYPE_CYLPAN = 2;
static const int BLEND_TYPE_HORZ = 3;
static const int STRIP_TYPE_THIN = 0;
static const int STRIP_TYPE_WIDE = 1;
static const int BLEND_RET_ERROR = -1;
static const int BLEND_RET_OK = 0;
static const int BLEND_RET_ERROR_MEMORY = 1;
static const int BLEND_RET_CANCELLED = -2;
Blend();
~Blend();
int initialize(int blendingType, int stripType, int frame_width, int frame_height);
int runBlend(MosaicFrame **frames, MosaicFrame **rframes, int frames_size, ImageType &imageMosaicYVU,
int &mosaicWidth, int &mosaicHeight, float &progress, bool &cancelComputation);
protected:
PyramidShort *m_pFrameYPyr;
PyramidShort *m_pFrameUPyr;
PyramidShort *m_pFrameVPyr;
PyramidShort *m_pMosaicYPyr;
PyramidShort *m_pMosaicUPyr;
PyramidShort *m_pMosaicVPyr;
CDelaunay m_Triangulator;
CSite *m_AllSites;
BlendParams m_wb;
// Height and width of individual frames
int width, height;
// Height and width of mosaic
unsigned short Mwidth, Mheight;
// Helper functions
void FrameToMosaic(double trs[3][3], double x, double y, double &wx, double &wy);
void MosaicToFrame(double trs[3][3], double x, double y, double &wx, double &wy);
void FrameToMosaicRect(int width, int height, double trs[3][3], BlendRect &brect);
void ClipBlendRect(CSite *csite, BlendRect &brect);
void AlignToMiddleFrame(MosaicFrame **frames, int frames_size);
int DoMergeAndBlend(MosaicFrame **frames, int nsite, int width, int height, YUVinfo &imgMos, MosaicRect &rect, MosaicRect &cropping_rect, float &progress, bool &cancelComputation);
void ComputeMask(CSite *csite, BlendRect &vcrect, BlendRect &brect, MosaicRect &rect, YUVinfo &imgMos, int site_idx);
void ProcessPyramidForThisFrame(CSite *csite, BlendRect &vcrect, BlendRect &brect, MosaicRect &rect, YUVinfo &imgMos, double trs[3][3], int site_idx);
int FillFramePyramid(MosaicFrame *mb);
// TODO: need to add documentation about the parameters
void ComputeBlendParameters(MosaicFrame **frames, int frames_size, int is360);
void SelectRelevantFrames(MosaicFrame **frames, int frames_size,
MosaicFrame **relevant_frames, int &relevant_frames_size);
int PerformFinalBlending(YUVinfo &imgMos, MosaicRect &cropping_rect);
void CropFinalMosaic(YUVinfo &imgMos, MosaicRect &cropping_rect);
private:
static const float LIMIT_SIZE_MULTIPLIER = 5.0f * 2.0f;
static const float LIMIT_HEIGHT_MULTIPLIER = 2.5f;
int MosaicSizeCheck(float sizeMultiplier, float heightMultiplier);
void RoundingCroppingSizeToMultipleOf8(MosaicRect& rect);
};
#endif
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