git.sesse.net Git - vlc/blob - modules/video_filter/motiondetect.c

   1 /*****************************************************************************
   2  * motiondetect.c : Motion detect video effect plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2005 VideoLAN
   5  * $Id: $
   6  *
   7  * Authors: Jérôme Decoodt <djc@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28 #include <string.h>
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc/vout.h>
  32 #include <vlc/intf.h>
  33
  34 #include "filter_common.h"
  35
  36 /*****************************************************************************
  37  * Local prototypes
  38  *****************************************************************************/
  39 static int  Create    ( vlc_object_t * );
  40 static void Destroy   ( vlc_object_t * );
  41
  42 static int  Init      ( vout_thread_t * );
  43 static void End       ( vout_thread_t * );
  44 static void Render    ( vout_thread_t *, picture_t * );
  45 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
  46                                                  picture_t *p_outpic );
  47
  48 static int  SendEvents   ( vlc_object_t *, char const *,
  49                            vlc_value_t, vlc_value_t, void * );
  50
  51 /*****************************************************************************
  52  * Module descriptor
  53  *****************************************************************************/
  54 #define DESC_TEXT N_("Description file")
  55 #define DESC_LONGTEXT N_("Description file, file containing simple playlist")
  56 #define HISTORY_TEXT N_("History parameter")
  57 #define HISTORY_LONGTEXT N_("History parameter, number of frames used for detection")
  58
  59 vlc_module_begin();
  60     set_description( _("Motion detect video filter") );
  61     set_shortname( N_( "Motion detect" ));
  62     set_capability( "video filter", 0 );
  63
  64     add_integer( "motiondetect-history", 1, NULL, HISTORY_TEXT,
  65                                 HISTORY_LONGTEXT, VLC_FALSE );
  66     add_string( "motiondetect-description", "motiondetect", NULL, DESC_TEXT,
  67                                 DESC_LONGTEXT, VLC_FALSE );
  68
  69     set_callbacks( Create, Destroy );
  70 vlc_module_end();
  71
  72 /*****************************************************************************
  73  * vout_sys_t: Motion detect video output method descriptor
  74  *****************************************************************************
  75  * This structure is part of the video output thread descriptor.
  76  * It describes the Motion detect specific properties of an output thread.
  77  *****************************************************************************/
  78 typedef struct area_t
  79 {
  80     int i_x1, i_y1;
  81     int i_x2, i_y2;
  82     int i_matches;
  83     int i_level;
  84     int i_downspeed, i_upspeed;
  85     char *psz_mrl;
  86 } area_t;
  87
  88 struct vout_sys_t
  89 {
  90     vout_thread_t *p_vout;
  91     playlist_t *p_playlist;
  92
  93     uint8_t *p_bufferY;
  94     int i_stack;
  95     area_t** pp_areas;
  96     int i_areas;
  97     int i_history;
  98 };
  99
 100 /*****************************************************************************
 101  * Control: control facility for the vout (forwards to child vout)
 102  *****************************************************************************/
 103 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 104 {
 105     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 106 }
 107
 108 /*****************************************************************************
 109  * Create: allocates Distort video thread output method
 110  *****************************************************************************
 111  * This function allocates and initializes a Distort vout method.
 112  *****************************************************************************/
 113 static int Create( vlc_object_t *p_this )
 114 {
 115     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 116     char *psz_descfilename;
 117     char buffer[256];
 118     int x1, x2, y1, y2, i_level, i_downspeed, i_upspeed, i;
 119     area_t *p_area;
 120     FILE * p_file;
 121
 122     /* Allocate structure */
 123     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 124     if( p_vout->p_sys == NULL )
 125     {
 126         msg_Err( p_vout, "out of memory" );
 127         return VLC_ENOMEM;
 128     }
 129
 130     p_vout->pf_init = Init;
 131     p_vout->pf_end = End;
 132     p_vout->pf_manage = NULL;
 133     p_vout->pf_render = Render;
 134     p_vout->pf_display = NULL;
 135     p_vout->pf_control = Control;
 136
 137     memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
 138
 139     p_vout->p_sys->i_history = config_GetInt( p_vout,
 140                                               "motiondetect-history" );
 141
 142     if( !(psz_descfilename = config_GetPsz( p_vout,
 143                                             "motiondetect-description" ) ) )
 144     {
 145         free( p_vout->p_sys );
 146         return VLC_EGENERIC;
 147     }
 148
 149     p_vout->p_sys->p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
 150                                                  FIND_ANYWHERE );
 151     if( !p_vout->p_sys->p_playlist )
 152     {
 153          msg_Err( p_vout, "playlist not found" );
 154          free( p_vout->p_sys );
 155          return VLC_EGENERIC;
 156     }
 157
 158     /* Parse description file and allocate areas */
 159     p_file = fopen( psz_descfilename, "r" );
 160     if( !p_file )
 161     {
 162         msg_Err( p_this, "Failed to open descritpion file %s",
 163                             psz_descfilename );
 164         free( psz_descfilename );
 165         free( p_vout->p_sys );
 166         return VLC_EGENERIC;
 167     }
 168     p_vout->p_sys->i_areas = 0;
 169     while( fscanf( p_file, "%d,%d,%d,%d,%d,%d,%d,",
 170                             &x1, &y1, &x2, &y2, &i_level,
 171                             &i_downspeed, &i_upspeed ) == 7 )
 172     {
 173         for( i = 0 ; i < 255 ; i++ )
 174         {
 175             fread( buffer + i, 1, 1, p_file );
 176             if( *( buffer + i ) == '\n' )
 177                 break;
 178         }
 179         *( buffer + i )  = 0;
 180         p_vout->p_sys->i_areas++;
 181         p_vout->p_sys->pp_areas = realloc( p_vout->p_sys->pp_areas,
 182                                         p_vout->p_sys->i_areas *
 183                                                     sizeof( area_t ) );
 184         if( !p_vout->p_sys->pp_areas )
 185             /*FIXME: clean this... */
 186             return VLC_ENOMEM;
 187         p_area = malloc( sizeof( area_t ) );
 188         if( !p_area )
 189             break;
 190
 191         p_area->i_x1 = x1;
 192         p_area->i_x2 = x2;
 193         p_area->i_y1 = y1;
 194         p_area->i_y2 = y2;
 195         p_area->i_matches = 0;
 196         p_area->i_level = i_level;
 197         p_area->i_downspeed = i_downspeed;
 198         p_area->i_upspeed = i_upspeed;
 199
 200         p_area->psz_mrl = strdup(buffer);
 201         p_vout->p_sys->pp_areas[p_vout->p_sys->i_areas-1] = p_area;
 202     }
 203     fclose( p_file );
 204     return VLC_SUCCESS;
 205 }
 206
 207 /*****************************************************************************
 208  * Init: initialize Motion detect video thread output method
 209  *****************************************************************************/
 210 static int Init( vout_thread_t *p_vout )
 211 {
 212     int i_index;
 213     picture_t *p_pic;
 214
 215     I_OUTPUTPICTURES = 0;
 216
 217     /* Initialize the output structure */
 218     p_vout->output.i_chroma = p_vout->render.i_chroma;
 219     p_vout->output.i_width  = p_vout->render.i_width;
 220     p_vout->output.i_height = p_vout->render.i_height;
 221     p_vout->output.i_aspect = p_vout->render.i_aspect;
 222
 223     /* Try to open the real video output */
 224     msg_Dbg( p_vout, "spawning the real video output" );
 225
 226     p_vout->p_sys->p_vout = vout_Create( p_vout,
 227                            p_vout->render.i_width, p_vout->render.i_height,
 228                            p_vout->render.i_chroma, p_vout->render.i_aspect );
 229
 230     /* Everything failed */
 231     if( p_vout->p_sys->p_vout == NULL )
 232     {
 233         msg_Err( p_vout, "cannot open vout, aborting" );
 234         return VLC_EGENERIC;
 235     }
 236
 237     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 238
 239     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 240
 241     ADD_PARENT_CALLBACKS( SendEventsToChild );
 242
 243     return VLC_SUCCESS;
 244 }
 245
 246 /*****************************************************************************
 247  * End: terminate Motion detect video thread output method
 248  *****************************************************************************/
 249 static void End( vout_thread_t *p_vout )
 250 {
 251     int i_index;
 252
 253     /* Free the fake output buffers we allocated */
 254     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 255     {
 256         i_index--;
 257         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 258     }
 259 }
 260
 261 /*****************************************************************************
 262  * Destroy: destroy Motion detect video thread output method
 263  *****************************************************************************
 264  * Terminate an output method created by DistortCreateOutputMethod
 265  *****************************************************************************/
 266 static void Destroy( vlc_object_t *p_this )
 267 {
 268     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 269     int i;
 270
 271     if( p_vout->p_sys->p_vout )
 272     {
 273         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 274         vlc_object_detach( p_vout->p_sys->p_vout );
 275         vout_Destroy( p_vout->p_sys->p_vout );
 276     }
 277
 278     DEL_PARENT_CALLBACKS( SendEventsToChild );
 279
 280     for( i = 0 ; i < p_vout->p_sys->i_areas ; i++ )
 281     {
 282         free( p_vout->p_sys->pp_areas[i]->psz_mrl );
 283         free( p_vout->p_sys->pp_areas[i] );
 284     }
 285
 286     free( p_vout->p_sys->pp_areas );
 287     free( p_vout->p_sys );
 288 }
 289
 290 /*****************************************************************************
 291  * Render: displays previously rendered output
 292  *****************************************************************************
 293  * This function send the currently rendered image to Distort image, waits
 294  * until it is displayed and switch the two rendering buffers, preparing next
 295  * frame.
 296  *****************************************************************************/
 297 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 298 {
 299     picture_t *p_outpic;
 300
 301     /* This is a new frame. Get a structure from the video_output. */
 302     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 303               == NULL )
 304     {
 305         if( p_vout->b_die || p_vout->b_error )
 306         {
 307             return;
 308         }
 309         msleep( VOUT_OUTMEM_SLEEP );
 310     }
 311
 312     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 313
 314     MotionDetect( p_vout, p_pic, p_outpic );
 315
 316     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 317 }
 318
 319 /*****************************************************************************
 320  * MotionDetect: calculates new matches
 321  *****************************************************************************/
 322 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
 323                                                  picture_t *p_outpic )
 324 {
 325 #define pp_curent_area p_vout->p_sys->pp_areas[i_area]
 326
 327     int i_index, i_index_col, i_area;
 328     for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
 329     {
 330         int i_line, i_num_lines, i_offset, i_size, i_diff;
 331         uint8_t *p_in, *p_out, *p_last_in, *p_buffer;
 332
 333         p_in = p_inpic->p[i_index].p_pixels;
 334         p_out = p_outpic->p[i_index].p_pixels;
 335
 336         i_num_lines = p_inpic->p[i_index].i_visible_lines;
 337         i_size = p_inpic->p[i_index].i_lines * p_inpic->p[i_index].i_pitch;
 338
 339         p_vout->p_vlc->pf_memcpy( p_out, p_in, i_size );
 340         switch( i_index )
 341         {
 342         case Y_PLANE:
 343             p_buffer = p_vout->p_sys->p_bufferY;
 344
 345             if( p_buffer == NULL)
 346             {
 347                 p_buffer = malloc( p_vout->p_sys->i_history * i_size);
 348                 memset( p_buffer, 0, p_vout->p_sys->i_history * i_size );
 349
 350                 p_vout->p_sys->p_bufferY = p_buffer;
 351                 p_vout->p_sys->i_stack = 0;
 352             }
 353
 354             i_offset = i_size * p_vout->p_sys->i_stack;
 355             p_last_in = p_buffer + i_offset;
 356             for( i_area = 0 ; i_area < p_vout->p_sys->i_areas ; i_area++)
 357             {
 358                 int i_tmp = 0, i_nb_pixels;
 359                 p_last_in = p_buffer + i_offset;
 360                 p_in = p_inpic->p[i_index].p_pixels;
 361                 p_out = p_outpic->p[i_index].p_pixels;
 362                 if( ( pp_curent_area->i_y1 > p_inpic->p[i_index].i_lines ) ||
 363                     ( pp_curent_area->i_x1 > p_inpic->p[i_index].i_pitch ) )
 364                     continue;
 365                 if( ( pp_curent_area->i_y2 > p_inpic->p[i_index].i_lines ) )
 366                     pp_curent_area->i_y2 = p_inpic->p[i_index].i_lines;
 367                 if( ( pp_curent_area->i_x2 > p_inpic->p[i_index].i_pitch ) )
 368                     pp_curent_area->i_x2 = p_inpic->p[i_index].i_pitch;
 369
 370                 for( i_line = pp_curent_area->i_y1 ;
 371                      i_line < pp_curent_area->i_y2 ; i_line++ )
 372                 {
 373                     for( i_index_col = pp_curent_area->i_x1 ;
 374                          i_index_col < pp_curent_area->i_x2 ; i_index_col++ )
 375                     {
 376                         i_diff = (*(p_last_in + i_index_col +
 377                                         i_line * p_inpic->p[i_index].i_pitch)
 378                                 - *(p_in      + i_index_col +
 379                                         i_line * p_inpic->p[i_index].i_pitch));
 380                         if( i_diff < 0)
 381                             i_diff = -i_diff;
 382
 383                         if( i_diff > pp_curent_area->i_level )
 384                             i_tmp += pp_curent_area->i_upspeed;
 385
 386                         *( p_out + i_index_col + i_line *
 387                                         p_inpic->p[i_index].i_pitch ) =
 388                                                 pp_curent_area->i_matches;
 389                     }
 390                 }
 391                 i_nb_pixels = ( pp_curent_area->i_y2 - pp_curent_area->i_y1 ) *
 392                               ( pp_curent_area->i_x2 - pp_curent_area->i_x1 );
 393                 pp_curent_area->i_matches += i_tmp / i_nb_pixels -
 394                                     pp_curent_area->i_downspeed;
 395                 if( pp_curent_area->i_matches < 0)
 396                     pp_curent_area->i_matches = 0;
 397                 if( pp_curent_area->i_matches > 255)
 398                 {
 399                     playlist_item_t *p_item = playlist_ItemNew( p_vout,
 400                                         (const char*)pp_curent_area->psz_mrl,
 401                                         pp_curent_area->psz_mrl );
 402                     msg_Dbg( p_vout, "Area(%d) matched, going to %s\n", i_area,
 403                                         pp_curent_area->psz_mrl );
 404                     playlist_Control( p_vout->p_sys->p_playlist,
 405                                         PLAYLIST_ITEMPLAY, p_item );
 406                     pp_curent_area->i_matches = 0;
 407                 }
 408             }
 409             p_last_in = p_buffer + i_offset;
 410             p_in = p_inpic->p[i_index].p_pixels;
 411             p_out = p_outpic->p[i_index].p_pixels;
 412
 413             p_vout->p_vlc->pf_memcpy( p_last_in, p_in, i_size );
 414             break;
 415         default:
 416             break;
 417         }
 418     }
 419     p_vout->p_sys->i_stack++;
 420     if( p_vout->p_sys->i_stack >= p_vout->p_sys->i_history )
 421         p_vout->p_sys->i_stack = 0;
 422 #undef pp_curent_area
 423 }
 424
 425 /*****************************************************************************
 426  * SendEvents: forward mouse and keyboard events to the parent p_vout
 427  *****************************************************************************/
 428 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 429                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 430 {
 431     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 432
 433     return VLC_SUCCESS;
 434 }
 435
 436 /*****************************************************************************
 437  * SendEventsToChild: forward events to the child/children vout
 438  *****************************************************************************/
 439 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 440                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 441 {
 442     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 443     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 444     return VLC_SUCCESS;
 445 }