hvirtual/plugins/motion/affine.h

Go to the documentation of this file.

#ifndef AFFINE_H
#define AFFINE_H


#include "affine.inc"
#include "loadbalance.h"
#include "vframe.inc"

// Affine transform library

#define AFFINE_OVERSAMPLE 2

class AffineMatrix
{
public:
        AffineMatrix();
        void identity();
        void translate(double x, double y);
        void scale(double x, double y);
// Result is put in dst
        void multiply(AffineMatrix *dst);
        void copy_from(AffineMatrix *src);
        void invert(AffineMatrix *dst);
        void transform_point(float x, float y, float *newx, float *newy);
        double determinant();
        void dump();
        double values[3][3];
};

class AffinePackage : public LoadPackage
{
public:
        AffinePackage();
        int y1, y2;
};

class AffineUnit : public LoadClient
{
public:
        AffineUnit(AffineEngine *server);
        void process_package(LoadPackage *package);
        void calculate_matrix(
                double in_x1,
                double in_y1,
                double in_x2,
                double in_y2,
                double out_x1,
                double out_y1,
                double out_x2,
                double out_y2,
                double out_x3,
                double out_y3,
                double out_x4,
                double out_y4,
                AffineMatrix *result);
        float transform_cubic(float dx,
        float jm1,
        float j,
        float jp1,
        float jp2);
        AffineEngine *server;
};

class AffineEngine : public LoadServer
{
public:
        AffineEngine(int total_clients, 
                int total_packages);

// Temp is only used for STRETCH oversampling
// Range of coords is 0 to 100 for coordinates in the image.
// The coordinate locations are clockwise around the image.
        void process(VFrame *output,
                VFrame *input, 
                VFrame *temp,
                int mode,
                float x1, 
                float y1, 
                float x2, 
                float y2, 
                float x3, 
                float y3, 
                float x4, 
                float y4,
                int forward);
// Do rotation with the affine/perspective transform.
// This removes some of the extremely faint artifacts in the trig rotation.
        void rotate(VFrame *output,
                VFrame *input, 
                float angle);
// Set the viewport to transform.  All operations are clamped to this area
// instead of the frame dimensions.  The rotation operation centers on this
// area.
        void set_viewport(int x, int y, int w, int h);
// For rotation, set the pivot point.  The default is in the middle of the viewport.
        void set_pivot(int x, int y);
        void unset_pivot();
        void unset_viewport();
// To use OpenGL for the processing, set to 1
        void set_opengl(int value);
        void init_packages();
        LoadClient* new_client();
        LoadPackage* new_package();
        VFrame *input, *output, *temp;
        int mode;
        enum
        {
                PERSPECTIVE,
                SHEER,
                STRETCH,
                ROTATE
        };
        float x1, y1, x2, y2, x3, y3, x4, y4;
        int x, y, w, h;
        int pivot_x, pivot_y;
        int user_pivot;
        int user_viewport;
        int forward;
        int use_opengl;
};



#endif

---