| 1 | /* |
| 2 | * transformtype_operations.h |
| 3 | * |
| 4 | * Copyright (C) Georg Martius - June 2007 - 2013 |
| 5 | * |
| 6 | * This file is part of transcode, a video stream processing tool |
| 7 | * |
| 8 | * transcode is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2, or (at your option) |
| 11 | * any later version. |
| 12 | * |
| 13 | * transcode is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with GNU Make; see the file COPYING. If not, write to |
| 20 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | * |
| 22 | */ |
| 23 | #ifndef __TRANSFORMTYPE_OPERATIONS_H |
| 24 | #define __TRANSFORMTYPE_OPERATIONS_H |
| 25 | |
| 26 | #include "transformtype.h" |
| 27 | #include "vidstabdefines.h" |
| 28 | #include "vsvector.h" |
| 29 | #include "frameinfo.h" |
| 30 | |
| 31 | /// helper macro to access a localmotion in the VSVector |
| 32 | #define LMGet(localmotions,index) \ |
| 33 | ((LocalMotion*)vs_vector_get(localmotions,index)) |
| 34 | |
| 35 | /* helper functions to create and operate with transforms. |
| 36 | * all functions are non-destructive |
| 37 | * the "_" version uses non-pointer Transforms. This is slower |
| 38 | * but useful when cascading calculations like |
| 39 | * add_transforms_(mult_transform(&t1, 5.0), &t2) |
| 40 | */ |
| 41 | VSTransform null_transform(void); |
| 42 | VSTransform new_transform(double x, double y, double alpha, |
| 43 | double zoom, double barrel, double rshutter, int extra); |
| 44 | VSTransform add_transforms(const VSTransform* t1, const VSTransform* t2); |
| 45 | VSTransform add_transforms_(const VSTransform t1, const VSTransform t2); |
| 46 | VSTransform sub_transforms(const VSTransform* t1, const VSTransform* t2); |
| 47 | VSTransform mult_transform(const VSTransform* t1, double f); |
| 48 | VSTransform mult_transform_(const VSTransform t1, double f); |
| 49 | |
| 50 | void storeVSTransform(FILE* f, const VSTransform* t); |
| 51 | |
| 52 | |
| 53 | typedef struct _preparedtransform { |
| 54 | const VSTransform* t; |
| 55 | double zcos_a; |
| 56 | double zsin_a; |
| 57 | double c_x; |
| 58 | double c_y; |
| 59 | } PreparedTransform; |
| 60 | |
| 61 | // transforms vector |
| 62 | PreparedTransform prepare_transform(const VSTransform* t, const VSFrameInfo* fi); |
| 63 | // transforms vector (attention, only integer) |
| 64 | Vec transform_vec(const PreparedTransform* t, const Vec* v); |
| 65 | void transform_vec_double(double *x, double* y, const PreparedTransform* t, const Vec* v); |
| 66 | |
| 67 | // subtract two vectors |
| 68 | Vec sub_vec(Vec v1, Vec v2); |
| 69 | // adds two vectors |
| 70 | Vec add_vec(Vec v1, Vec v2); |
| 71 | Vec field_to_vec(Field f); |
| 72 | |
| 73 | /* compares a transform with respect to x (for sort function) */ |
| 74 | int cmp_trans_x(const void *t1, const void* t2); |
| 75 | /* compares a transform with respect to y (for sort function) */ |
| 76 | int cmp_trans_y(const void *t1, const void* t2); |
| 77 | /* static int cmp_trans_alpha(const void *t1, const void* t2); */ |
| 78 | |
| 79 | /* compares two double values (for sort function)*/ |
| 80 | int cmp_double(const void *t1, const void* t2); |
| 81 | /* compares two int values (for sort function)*/ |
| 82 | int cmp_int(const void *t1, const void* t2); |
| 83 | |
| 84 | |
| 85 | /** square of a number */ |
| 86 | double sqr(double x); |
| 87 | |
| 88 | /* calculates the median of an array of transforms, |
| 89 | * considering only x and y |
| 90 | */ |
| 91 | VSTransform median_xy_transform(const VSTransform* transforms, int len); |
| 92 | /* median of a double array */ |
| 93 | double median(double* ds, int len); |
| 94 | /* mean of a double array */ |
| 95 | double mean(const double* ds, int len); |
| 96 | /* standard deviation of a double array */ |
| 97 | double stddev(const double* ds, int len, double mean); |
| 98 | /* mean with cutted upper and lower pentile |
| 99 | * (min and max are optionally returned) |
| 100 | */ |
| 101 | double cleanmean(double* ds, int len, double* minimum, double* maximum); |
| 102 | /* calulcates the cleaned mean of an array of transforms, |
| 103 | * considerung only x and y |
| 104 | */ |
| 105 | VSTransform cleanmean_xy_transform(const VSTransform* transforms, int len); |
| 106 | |
| 107 | /* calculates the cleaned (cutting of x-th percentil) |
| 108 | * maximum and minimum of an array of transforms, |
| 109 | * considerung only x and y |
| 110 | */ |
| 111 | void cleanmaxmin_xy_transform(const VSTransform* transforms, int len, |
| 112 | int percentil, |
| 113 | VSTransform* min, VSTransform* max); |
| 114 | |
| 115 | /* calculates the required zoom value to have no borders visible |
| 116 | */ |
| 117 | double transform_get_required_zoom(const VSTransform* transform, int width, int height); |
| 118 | |
| 119 | /* helper function to work with local motions */ |
| 120 | |
| 121 | LocalMotion null_localmotion(void); |
| 122 | /// a new array of the v.x values is returned (vs_free has to be called) |
| 123 | int* localmotions_getx(const LocalMotions* localmotions); |
| 124 | /// a new array of the v.y values is returned (vs_free has to be called) |
| 125 | int* localmotions_gety(const LocalMotions* localmotions); |
| 126 | /// lm1 - lm2 only for the Vec (the remaining values are taken from lm1) |
| 127 | LocalMotion sub_localmotion(const LocalMotion* lm1, const LocalMotion* lm2); |
| 128 | |
| 129 | /* calulcates the cleaned mean of the vector of localmotions |
| 130 | * considerung only v.x and v.y |
| 131 | */ |
| 132 | LocalMotion cleanmean_localmotions(const LocalMotions* localmotions); |
| 133 | |
| 134 | VSArray localmotionsGetMatch(const LocalMotions* localmotions); |
| 135 | |
| 136 | /* helper functions */ |
| 137 | |
| 138 | /* optimized round function */ |
| 139 | inline static int myround(float x) { |
| 140 | if(x>0) |
| 141 | return x + 0.5; |
| 142 | else |
| 143 | return x - 0.5; |
| 144 | } |
| 145 | |
| 146 | |
| 147 | /* optimized floor function |
| 148 | This does not give the correct value for negative integer values like -1.0. In this case |
| 149 | it will produce -2.0. |
| 150 | */ |
| 151 | inline static int myfloor(float x) { |
| 152 | if(x<0) |
| 153 | return x - 1; |
| 154 | else |
| 155 | return x; |
| 156 | } |
| 157 | |
| 158 | #endif |
| 159 | |
| 160 | /* |
| 161 | * Local variables: |
| 162 | * c-file-style: "stroustrup" |
| 163 | * c-file-offsets: ((case-label . *) (statement-case-intro . *)) |
| 164 | * indent-tabs-mode: nil |
| 165 | * c-basic-offset: 2 t |
| 166 | * End: |
| 167 | * |
| 168 | * vim: expandtab shiftwidth=2: |
| 169 | */ |