research.m1stereo.tv/gitweb/ - melted/blob - src/modules/motion_est/filter_autotrack_rectangle.c

   1 /*
   2  *      filter_autotrack_rectangle.c
   3  *
   4  *      /brief
   5  *      /author Zachary Drew, Copyright 2005
   6  *
   7  *
   8  * This program 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 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program 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 this program; if not, write to the Free Software Foundation,
  20  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21  */
  22
  23 #include "filter_motion_est.h"
  24 #include "arrow_code.h"
  25
  26 #include <framework/mlt.h>
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <math.h>
  31 #include <string.h>
  32
  33 #define MIN(a,b) ((a) > (b) ? (b) : (a))
  34
  35 #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
  36 #define ABS(a) ((a) >= 0 ? (a) : (-(a)))
  37
  38 void caculate_motion( struct motion_vector_s *vectors,
  39                       mlt_geometry_item boundry,
  40                       int macroblock_width,
  41                       int macroblock_height,
  42                       int mv_buffer_width,
  43                       int method )
  44 {
  45
  46
  47         // translate pixel units (from bounds) to macroblock units
  48         // make sure whole macroblock stay within bounds
  49         int left_mb = ( boundry->x + macroblock_width - 1 ) / macroblock_width;
  50         int top_mb = ( boundry->y + macroblock_height - 1 ) / macroblock_height;
  51         int right_mb = ( boundry->x + boundry->w ) / macroblock_width - 1;
  52         int bottom_mb = ( boundry->y + boundry->h ) / macroblock_height - 1;
  53
  54         int i, j, n = 0;
  55
  56         int average_x = 0, average_y = 0;
  57
  58         #define CURRENT         ( vectors + j*mv_buffer_width + i )
  59
  60         for( i = left_mb; i <= right_mb; i++ ){
  61                 for( j = top_mb; j <= bottom_mb; j++ )
  62                 {
  63                         n++;
  64                         average_x += CURRENT->dx;
  65                         average_y += CURRENT->dy;
  66                 }
  67         }
  68
  69         if ( n == 0 ) return;
  70
  71         average_x /= n;
  72         average_y /= n;
  73
  74         n = 0;
  75         int average2_x = 0, average2_y = 0;
  76         for( i = left_mb; i <= right_mb; i++ ){
  77                 for( j = top_mb; j <= bottom_mb; j++ ){
  78
  79                         if( ABS(CURRENT->dx - average_x) < 3 &&
  80                             ABS(CURRENT->dy - average_y) < 3 )
  81                         {
  82                                 n++;
  83                                 average2_x += CURRENT->dx;
  84                                 average2_y += CURRENT->dy;
  85                         }
  86                 }
  87         }
  88
  89         if ( n == 0 ) return;
  90
  91         boundry->x -= (double)average2_x / (double)n;
  92         boundry->y -= (double)average2_y / (double)n;
  93 }
  94
  95 // Image stack(able) method
  96 static int filter_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
  97 {
  98
  99         // Get the filter object
 100         mlt_filter filter = mlt_frame_pop_service( frame );
 101
 102         // Get the filter's property object
 103         mlt_properties filter_properties = MLT_FILTER_PROPERTIES(filter);
 104
 105         // Get the frame properties
 106         mlt_properties frame_properties = MLT_FRAME_PROPERTIES(frame);
 107
 108         // Get the frame position
 109         mlt_position position = mlt_frame_get_position( frame );
 110
 111         // Get the new image
 112         int error = mlt_frame_get_image( frame, image, format, width, height, 1 );
 113
 114         if( error != 0 )
 115                 mlt_properties_debug( frame_properties, "error after mlt_frame_get_image() in autotrack_rectangle", stderr );
 116
 117         // Get the geometry object
 118         mlt_geometry geometry = mlt_properties_get_data(filter_properties, "geometry", NULL);
 119
 120         // Get the current geometry item
 121         struct mlt_geometry_item_s boundry;
 122         mlt_geometry_fetch(geometry, &boundry, position);
 123
 124         // Get the motion vectors
 125         struct motion_vector_s *vectors = mlt_properties_get_data( frame_properties, "motion_est.vectors", NULL );
 126
 127         // How did the rectangle move?
 128         if( vectors != NULL &&
 129             boundry.key != 1 ) // Paused?
 130         {
 131
 132                 int method = mlt_properties_get_int( filter_properties, "method" );
 133
 134                 // Get the size of macroblocks in pixel units
 135                 int macroblock_height = mlt_properties_get_int( frame_properties, "motion_est.macroblock_height" );
 136                 int macroblock_width = mlt_properties_get_int( frame_properties, "motion_est.macroblock_width" );
 137                 int mv_buffer_width = *width / macroblock_width;
 138
 139                 caculate_motion( vectors, &boundry, macroblock_width, macroblock_height, mv_buffer_width, method );
 140
 141
 142                 // Make the geometry object a real boy
 143                 boundry.key = 1;
 144                 boundry.f[0] = 1;
 145                 boundry.f[1] = 1;
 146                 boundry.f[2] = 1;
 147                 boundry.f[3] = 1;
 148                 boundry.f[4] = 1;
 149                 mlt_geometry_insert(geometry, &boundry);
 150         }
 151
 152         if( mlt_properties_get_int( filter_properties, "debug" ) == 1 )
 153         {
 154                 init_arrows( format, *width, *height );
 155                 draw_rectangle_outline(*image, boundry.x, boundry.y, boundry.w, boundry.h, 100);
 156         }
 157
 158         return error;
 159 }
 160
 161 static int attach_boundry_to_frame( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
 162 {
 163         // Get the filter object
 164         mlt_filter filter = mlt_frame_pop_service( frame );
 165
 166         // Get the filter's property object
 167         mlt_properties filter_properties = MLT_FILTER_PROPERTIES(filter);
 168
 169         // Get the frame properties
 170         mlt_properties frame_properties = MLT_FRAME_PROPERTIES(frame);
 171
 172         // Get the frame position
 173         mlt_position position = mlt_frame_get_position( frame );
 174
 175         // Get the geometry object
 176         mlt_geometry geometry = mlt_properties_get_data(filter_properties, "geometry", NULL);
 177
 178         // Get the current geometry item
 179         mlt_geometry_item geometry_item = mlt_pool_alloc( sizeof( struct mlt_geometry_item_s ) );
 180         mlt_geometry_fetch(geometry, geometry_item, position);
 181
 182         mlt_properties_set_data( frame_properties, "bounds", geometry_item, sizeof( struct mlt_geometry_item_s ), mlt_pool_release, NULL );
 183
 184         // Get the new image
 185         int error = mlt_frame_get_image( frame, image, format, width, height, 1 );
 186
 187         if( error != 0 )
 188                 mlt_properties_debug( frame_properties, "error after mlt_frame_get_image() in autotrack_rectangle attach_boundry_to_frame", stderr );
 189
 190         return error;
 191 }
 192
 193 /** Filter processing.
 194 */
 195
 196 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 197 {
 198
 199         /* modify the frame with the current geometry */
 200         mlt_frame_push_service( frame, this);
 201         mlt_frame_push_get_image( frame, attach_boundry_to_frame );
 202
 203
 204
 205         /* apply the motion estimation filter */
 206         mlt_filter motion_est = mlt_properties_get_data( MLT_FILTER_PROPERTIES(this), "_motion_est", NULL );
 207         mlt_filter_process( motion_est, frame);
 208
 209
 210
 211         /* calculate the new geometry based on the motion */
 212         mlt_frame_push_service( frame, this);
 213         mlt_frame_push_get_image( frame, filter_get_image );
 214
 215
 216         /* visualize the motion vectors */
 217         if( mlt_properties_get_int( MLT_FILTER_PROPERTIES(this), "debug" ) == 1 )
 218         {
 219                 mlt_filter vismv = mlt_properties_get_data( MLT_FILTER_PROPERTIES(this), "_vismv", NULL );
 220                 if( vismv == NULL ) {
 221                         vismv = mlt_factory_filter( "vismv", NULL );
 222                         mlt_properties_set_data( MLT_FILTER_PROPERTIES(this), "_vismv", vismv, 0, (mlt_destructor)mlt_filter_close, NULL );
 223                 }
 224
 225                 mlt_filter_process( vismv, frame );
 226         }
 227
 228
 229         return frame;
 230 }
 231
 232 /** Constructor for the filter.
 233 */
 234
 235
 236 mlt_filter filter_autotrack_rectangle_init( char *arg )
 237 {
 238         mlt_filter this = mlt_filter_new( );
 239         if ( this != NULL )
 240         {
 241                 this->process = filter_process;
 242
 243
 244                 mlt_geometry geometry = mlt_geometry_init();
 245
 246                 // Initialize with the supplied geometry
 247                 if( arg != NULL ) {
 248
 249                         struct mlt_geometry_item_s item;
 250
 251                         mlt_geometry_parse_item( geometry, &item, arg  );
 252
 253                         item.frame = 0;
 254                         item.key = 1;
 255                         item.mix = 100;
 256
 257                         mlt_geometry_insert( geometry, &item );
 258
 259                 }
 260
 261                 // ... and attach it to the frame
 262                 mlt_properties_set_data( MLT_FILTER_PROPERTIES(this), "geometry", geometry, 0, (mlt_destructor)mlt_geometry_close, (mlt_serialiser)mlt_geometry_serialise );
 263
 264                 // create an instance of the motion_est filter
 265                 mlt_filter motion_est = mlt_factory_filter("motion_est", NULL);
 266                 if( motion_est != NULL )
 267                         mlt_properties_set_data( MLT_FILTER_PROPERTIES(this), "_motion_est", motion_est, 0, (mlt_destructor)mlt_filter_close, NULL );
 268                 else {
 269                         mlt_filter_close( this );
 270                         return NULL;
 271                 }
 272
 273
 274         }
 275
 276         return this;
 277 }
 278
 279 /** This source code will self destruct in 5...4...3...
 280 */