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
  25 #include <framework/mlt.h>
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <math.h>
  30 #include <string.h>
  31
  32 #define MIN(a,b) ((a) > (b) ? (b) : (a))
  33
  34 #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
  35 #define ABS(a) ((a) >= 0 ? (a) : (-(a)))
  36
  37 // ffmpeg borrowed
  38 static inline int clip(int a, int amin, int amax)
  39 {
  40     if (a < amin)
  41         return amin;
  42     else if (a > amax)
  43         return amax;
  44     else
  45         return a;
  46 }
  47
  48
  49 /**
  50  * draws an line from (ex, ey) -> (sx, sy).
  51  * Credits: modified from ffmpeg project
  52  * @param ystride stride/linesize of the image
  53  * @param xstride stride/element size of the image
  54  * @param color color of the arrow
  55  */
  56 static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int xstride, int ystride, int color){
  57     int t, x, y, fr, f;
  58
  59 //    buf[sy*ystride + sx*xstride]= color;
  60     buf[sy*ystride + sx]+= color;
  61
  62     sx= clip(sx, 0, w-1);
  63     sy= clip(sy, 0, h-1);
  64     ex= clip(ex, 0, w-1);
  65     ey= clip(ey, 0, h-1);
  66
  67     if(ABS(ex - sx) > ABS(ey - sy)){
  68         if(sx > ex){
  69             t=sx; sx=ex; ex=t;
  70             t=sy; sy=ey; ey=t;
  71         }
  72         buf+= sx*xstride + sy*ystride;
  73         ex-= sx;
  74         f= ((ey-sy)<<16)/ex;
  75         for(x= 0; x <= ex; x++){
  76             y = (x*f)>>16;
  77             fr= (x*f)&0xFFFF;
  78             buf[ y   *ystride + x*xstride]= (color*(0x10000-fr))>>16;
  79             buf[(y+1)*ystride + x*xstride]= (color*         fr )>>16;
  80         }
  81     }else{
  82         if(sy > ey){
  83             t=sx; sx=ex; ex=t;
  84             t=sy; sy=ey; ey=t;
  85         }
  86         buf+= sx*xstride + sy*ystride;
  87         ey-= sy;
  88         if(ey) f= ((ex-sx)<<16)/ey;
  89         else   f= 0;
  90         for(y= 0; y <= ey; y++){
  91             x = (y*f)>>16;
  92             fr= (y*f)&0xFFFF;
  93             buf[y*ystride + x    *xstride]= (color*(0x10000-fr))>>16;;
  94             buf[y*ystride + (x+1)*xstride]= (color*         fr )>>16;;
  95         }
  96     }
  97 }
  98
  99 /**
 100  * draws an arrow from (ex, ey) -> (sx, sy).
 101  * Credits: modified from ffmpeg project
 102  * @param stride stride/linesize of the image
 103  * @param color color of the arrow
 104  */
 105 static __attribute__((used)) void draw_arrow(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int xstride, int ystride, int color){
 106     int dx,dy;
 107
 108 //    sx= clip(sx, -100, w+100);
 109 //    sy= clip(sy, -100, h+100);
 110 //    ex= clip(ex, -100, w+100);
 111 //    ey= clip(ey, -100, h+100);
 112
 113         dx= ex - sx;
 114         dy= ey - sy;
 115
 116         if(dx*dx + dy*dy > 3*3){
 117                 int rx=  dx + dy;
 118                 int ry= -dx + dy;
 119                 int length= sqrt((rx*rx + ry*ry)<<8);
 120
 121                 //FIXME subpixel accuracy
 122                 rx= ROUNDED_DIV(rx*3<<4, length);
 123                 ry= ROUNDED_DIV(ry*3<<4, length);
 124
 125                 draw_line(buf, sx, sy, sx + rx, sy + ry, w, h, xstride, ystride, color);
 126                 draw_line(buf, sx, sy, sx - ry, sy + rx, w, h, xstride, ystride, color);
 127         }
 128         draw_line(buf, sx, sy, ex, ey, w, h, xstride, ystride, color);
 129 }
 130
 131 void caculate_motion( struct motion_vector_s *vectors,
 132                       mlt_geometry_item boundry,
 133                       int macroblock_width,
 134                       int macroblock_height,
 135                       int mv_buffer_width,
 136                       int method )
 137 {
 138
 139
 140         // translate pixel units (from bounds) to macroblock units
 141         // make sure whole macroblock stay within bounds
 142         // I know; it hurts.
 143         int left_mb = boundry->x / macroblock_width;
 144             left_mb += ( (int)boundry->x % macroblock_width == 0 ) ? 0 : 1 ;
 145         int top_mb = boundry->y / macroblock_height;
 146             top_mb += ( (int)boundry->y % macroblock_height == 0 ) ? 0 : 1 ;
 147
 148         int right_mb = (boundry->x + boundry->w + 1) / macroblock_width;
 149             right_mb -= ( (int)(boundry->x + boundry->w + 1) % macroblock_width == 0 ) ? 0 : 1 ;
 150         int bottom_mb = (boundry->y + boundry->h + 1) / macroblock_height;
 151             bottom_mb -= ( (int)(boundry->y + boundry->h + 1) % macroblock_height == 0 ) ? 0 : 1 ;
 152
 153         int i, j, n = 0;
 154
 155         int average_x = 0, average_y = 0;
 156
 157         #define CURRENT         ( vectors + j*mv_buffer_width + i )
 158
 159         for( i = left_mb; i <= right_mb; i++ ){
 160                 for( j = top_mb; j <= bottom_mb; j++ ){
 161
 162                         n++;
 163
 164                         average_x += CURRENT->dx;
 165                         average_y += CURRENT->dy;
 166                 }
 167         }
 168
 169         if ( n == 0 )
 170                 return;
 171
 172         average_x /= n;
 173         average_y /= n;
 174
 175         int average2_x = 0, average2_y = 0;
 176         for( i = left_mb; i <= right_mb; i++ ){
 177                 for( j = top_mb; j <= bottom_mb; j++ ){
 178
 179                         if( ABS(CURRENT->dx - average_x) < 5 &&
 180                             ABS(CURRENT->dy - average_y) < 5 )
 181                         {
 182                                 average2_x += CURRENT->dx;
 183                                 average2_y += CURRENT->dy;
 184                         }
 185                 }
 186         }
 187
 188         boundry->x -= average2_x/n;
 189         boundry->y -= average2_y/n;
 190
 191
 192 }
 193
 194 // Image stack(able) method
 195 static int filter_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
 196 {
 197
 198         // Get the filter object
 199         mlt_filter filter = mlt_frame_pop_service( frame );
 200
 201         // Get the filter's property object
 202         mlt_properties filter_properties = MLT_FILTER_PROPERTIES(filter);
 203
 204         // Get the frame properties
 205         mlt_properties frame_properties = MLT_FRAME_PROPERTIES(frame);
 206
 207         // Get the frame position
 208         mlt_position position = mlt_frame_get_position( frame );
 209
 210         // Get the new image
 211         int error = mlt_frame_get_image( frame, image, format, width, height, 1 );
 212
 213         if( error != 0 )
 214                 mlt_properties_debug( frame_properties, "error after mlt_frame_get_image() in autotrack_rectangle", stderr );
 215
 216         // Get the geometry object
 217         mlt_geometry geometry = mlt_properties_get_data(filter_properties, "geometry", NULL);
 218
 219         // Get the current geometry item
 220         struct mlt_geometry_item_s boundry;
 221         mlt_geometry_fetch(geometry, &boundry, position);
 222 //fprintf(stderr, "process %d\n", position);
 223
 224         // Get the motion vectors
 225         struct motion_vector_s *vectors = mlt_properties_get_data( frame_properties, "motion_est.vectors", NULL );
 226
 227         // How did the rectangle move?
 228         if( vectors != NULL ) {
 229
 230                 int method = mlt_properties_get_int( filter_properties, "method" );
 231
 232                 // Get the size of macroblocks in pixel units
 233                 int macroblock_height = mlt_properties_get_int( frame_properties, "motion_est.macroblock_height" );
 234                 int macroblock_width = mlt_properties_get_int( frame_properties, "motion_est.macroblock_width" );
 235                 int mv_buffer_width = *width / macroblock_width;
 236
 237                 caculate_motion( vectors, &boundry, macroblock_width, macroblock_height, mv_buffer_width, method );
 238
 239         }
 240
 241         boundry.key = 1;
 242
 243         boundry.f[0] = 1;
 244         boundry.f[1] = 1;
 245         boundry.f[2] = 1;
 246         boundry.f[3] = 1;
 247         boundry.f[4] = 1;
 248
 249 //      boundry.frame = position;
 250
 251         mlt_geometry_insert(geometry, &boundry);
 252
 253
 254         if( mlt_properties_get_int( filter_properties, "debug" ) == 1 )
 255         {
 256                 int xstep, ystep;
 257
 258                 // Calculate the size of our steps (the number of bytes that seperate adjacent pixels in X and Y direction)
 259                 switch( *format ) {
 260                         case mlt_image_yuv422:
 261                                 xstep = 2;
 262                                 ystep = xstep * *width;
 263                                 break;
 264                         default:
 265                                 // I don't know
 266                                 return -1;
 267                                 break;
 268                 }
 269
 270                 draw_line(*image, boundry.x, boundry.y, boundry.x, boundry.y + boundry.h, *width, *height, xstep, ystep, 0xff);
 271                 draw_line(*image, boundry.x, boundry.y + boundry.h, boundry.x + boundry.w, boundry.y + boundry.h, *width, *height, xstep, ystep, 0xff);
 272                 draw_line(*image, boundry.x + boundry.w, boundry.y + boundry.h, boundry.x + boundry.w, boundry.y, *width, *height, xstep, ystep, 0xff);
 273                 draw_line(*image, boundry.x + boundry.w, boundry.y, boundry.x, boundry.y, *width, *height, xstep, ystep, 0xff);
 274
 275         }
 276         return error;
 277 }
 278
 279 static int attach_boundry_to_frame( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
 280 {
 281         // Get the filter object
 282         mlt_filter filter = mlt_frame_pop_service( frame );
 283
 284         // Get the filter's property object
 285         mlt_properties filter_properties = MLT_FILTER_PROPERTIES(filter);
 286
 287         // Get the frame properties
 288         mlt_properties frame_properties = MLT_FRAME_PROPERTIES(frame);
 289
 290         // Get the frame position
 291         mlt_position position = mlt_frame_get_position( frame );
 292
 293         // gEt the geometry object
 294         mlt_geometry geometry = mlt_properties_get_data(filter_properties, "geometry", NULL);
 295
 296         // Get the current geometry item
 297         mlt_geometry_item geometry_item = mlt_pool_alloc( sizeof( struct mlt_geometry_item_s ) );
 298         mlt_geometry_fetch(geometry, geometry_item, position);
 299 //fprintf(stderr, "attach %d\n", position);
 300
 301         mlt_properties_set_data( frame_properties, "bounds", geometry_item, sizeof( struct mlt_geometry_item_s ), mlt_pool_release, NULL );
 302
 303         // Get the new image
 304         int error = mlt_frame_get_image( frame, image, format, width, height, 1 );
 305
 306         if( error != 0 )
 307                 mlt_properties_debug( frame_properties, "error after mlt_frame_get_image() in autotrack_rectangle attach_boundry_to_frame", stderr );
 308
 309         return error;
 310 }
 311
 312 /** Filter processing.
 313 */
 314
 315 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 316 {
 317
 318         //mlt_properties_debug(MLT_SERVICE_PROPERTIES(mlt_service_consumer(mlt_filter_service(this))), "consumer!", stderr);
 319
 320
 321         /* modify the frame with the current geometry */
 322         mlt_frame_push_service( frame, this);
 323         mlt_frame_push_get_image( frame, attach_boundry_to_frame );
 324
 325
 326
 327         /* apply the motion estimation filter */
 328         mlt_filter motion_est = mlt_properties_get_data( MLT_FILTER_PROPERTIES(this), "_motion_est", NULL );
 329         mlt_filter_process( motion_est, frame);
 330
 331
 332
 333         /* calculate the new geometry based on the motion */
 334         mlt_frame_push_service( frame, this);
 335         mlt_frame_push_get_image( frame, filter_get_image );
 336
 337
 338         /* visualize the motion vectors */
 339         if( mlt_properties_get_int( MLT_FILTER_PROPERTIES(this), "debug" ) == 1 )
 340         {
 341                 mlt_filter vismv = mlt_properties_get_data( MLT_FILTER_PROPERTIES(this), "_vismv", NULL );
 342                 if( vismv == NULL ) {
 343                         vismv = mlt_factory_filter( "vismv", NULL );
 344                         mlt_properties_set_data( MLT_FILTER_PROPERTIES(this), "_vismv", vismv, 0, (mlt_destructor)mlt_filter_close, NULL );
 345                 }
 346
 347                 mlt_filter_process( vismv, frame );
 348         }
 349
 350
 351         return frame;
 352 }
 353
 354 /** Constructor for the filter.
 355 */
 356
 357
 358 mlt_filter filter_autotrack_rectangle_init( char *arg )
 359 {
 360         mlt_filter this = mlt_filter_new( );
 361         if ( this != NULL )
 362         {
 363                 this->process = filter_process;
 364
 365
 366                 mlt_geometry geometry = mlt_geometry_init();
 367
 368                 // Initialize with the supplied geometry
 369                 if( arg != NULL ) {
 370
 371                         struct mlt_geometry_item_s item;
 372
 373                         mlt_geometry_parse_item( geometry, &item, arg  );
 374
 375                         item.frame = 0;
 376                         item.key = 1;
 377                         item.mix = 100;
 378
 379                         mlt_geometry_insert( geometry, &item );
 380
 381                 }
 382
 383                 mlt_properties_set_data( MLT_FILTER_PROPERTIES(this), "geometry", geometry, 0, (mlt_destructor)mlt_geometry_close, (mlt_serialiser)mlt_geometry_serialise );
 384
 385                 mlt_filter motion_est = mlt_factory_filter("motion_est", NULL);
 386                 if( motion_est != NULL )
 387                         mlt_properties_set_data( MLT_FILTER_PROPERTIES(this), "_motion_est", motion_est, 0, (mlt_destructor)mlt_filter_close, NULL );
 388                 else {
 389                         mlt_filter_close( this );
 390                         return NULL;
 391                 }
 392
 393                 //mlt_events_init( this );
 394                 //mlt_events_listen(mlt_service_consumer(mlt_filter_service(this)
 395         }
 396
 397         return this;
 398 }
 399
 400 /** This source code will self destruct in 5...4...3...
 401 */