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 the VideoLAN team
   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_category( CAT_VIDEO );
  63     set_subcategory( SUBCAT_VIDEO_VFILTER );
  64     set_capability( "video filter", 0 );
  65
  66     add_integer( "motiondetect-history", 1, NULL, HISTORY_TEXT,
  67                                 HISTORY_LONGTEXT, VLC_FALSE );
  68     add_string( "motiondetect-description", "motiondetect", NULL, DESC_TEXT,
  69                                 DESC_LONGTEXT, VLC_FALSE );
  70
  71     set_callbacks( Create, Destroy );
  72 vlc_module_end();
  73
  74 /*****************************************************************************
  75  * vout_sys_t: Motion detect video output method descriptor
  76  *****************************************************************************
  77  * This structure is part of the video output thread descriptor.
  78  * It describes the Motion detect specific properties of an output thread.
  79  *****************************************************************************/
  80 typedef struct area_t
  81 {
  82     int i_x1, i_y1;
  83     int i_x2, i_y2;
  84     int i_matches;
  85     int i_level;
  86     int i_downspeed, i_upspeed;
  87     char *psz_mrl;
  88 } area_t;
  89
  90 struct vout_sys_t
  91 {
  92     vout_thread_t *p_vout;
  93     playlist_t *p_playlist;
  94
  95     uint8_t *p_bufferY;
  96     int i_stack;
  97     area_t** pp_areas;
  98     int i_areas;
  99     int i_history;
 100 };
 101
 102 /*****************************************************************************
 103  * Control: control facility for the vout (forwards to child vout)
 104  *****************************************************************************/
 105 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 106 {
 107     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 108 }
 109
 110 /*****************************************************************************
 111  * Create: allocates Distort video thread output method
 112  *****************************************************************************
 113  * This function allocates and initializes a Distort vout method.
 114  *****************************************************************************/
 115 static int Create( vlc_object_t *p_this )
 116 {
 117     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 118     char *psz_descfilename;
 119     char buffer[256];
 120     int x1, x2, y1, y2, i_level, i_downspeed, i_upspeed, i;
 121     area_t *p_area;
 122     FILE * p_file;
 123
 124     /* Allocate structure */
 125     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 126     if( p_vout->p_sys == NULL )
 127     {
 128         msg_Err( p_vout, "out of memory" );
 129         return VLC_ENOMEM;
 130     }
 131
 132     p_vout->pf_init = Init;
 133     p_vout->pf_end = End;
 134     p_vout->pf_manage = NULL;
 135     p_vout->pf_render = Render;
 136     p_vout->pf_display = NULL;
 137     p_vout->pf_control = Control;
 138
 139     memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
 140
 141     p_vout->p_sys->i_history = config_GetInt( p_vout,
 142                                               "motiondetect-history" );
 143
 144     if( !(psz_descfilename = config_GetPsz( p_vout,
 145                                             "motiondetect-description" ) ) )
 146     {
 147         free( p_vout->p_sys );
 148         return VLC_EGENERIC;
 149     }
 150
 151     p_vout->p_sys->p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
 152                                                  FIND_ANYWHERE );
 153     if( !p_vout->p_sys->p_playlist )
 154     {
 155          msg_Err( p_vout, "playlist not found" );
 156          free( p_vout->p_sys );
 157          return VLC_EGENERIC;
 158     }
 159
 160     /* Parse description file and allocate areas */
 161     p_file = fopen( psz_descfilename, "r" );
 162     if( !p_file )
 163     {
 164         msg_Err( p_this, "Failed to open descritpion file %s",
 165                             psz_descfilename );
 166         free( psz_descfilename );
 167         free( p_vout->p_sys );
 168         return VLC_EGENERIC;
 169     }
 170     p_vout->p_sys->i_areas = 0;
 171     while( fscanf( p_file, "%d,%d,%d,%d,%d,%d,%d,",
 172                             &x1, &y1, &x2, &y2, &i_level,
 173                             &i_downspeed, &i_upspeed ) == 7 )
 174     {
 175         for( i = 0 ; i < 255 ; i++ )
 176         {
 177             fread( buffer + i, 1, 1, p_file );
 178             if( *( buffer + i ) == '\n' )
 179                 break;
 180         }
 181         *( buffer + i )  = 0;
 182         p_vout->p_sys->i_areas++;
 183         p_vout->p_sys->pp_areas = realloc( p_vout->p_sys->pp_areas,
 184                                         p_vout->p_sys->i_areas *
 185                                                     sizeof( area_t ) );
 186         if( !p_vout->p_sys->pp_areas )
 187             /*FIXME: clean this... */
 188             return VLC_ENOMEM;
 189         p_area = malloc( sizeof( area_t ) );
 190         if( !p_area )
 191             break;
 192
 193         p_area->i_x1 = x1;
 194         p_area->i_x2 = x2;
 195         p_area->i_y1 = y1;
 196         p_area->i_y2 = y2;
 197         p_area->i_matches = 0;
 198         p_area->i_level = i_level;
 199         p_area->i_downspeed = i_downspeed;
 200         p_area->i_upspeed = i_upspeed;
 201
 202         p_area->psz_mrl = strdup(buffer);
 203         p_vout->p_sys->pp_areas[p_vout->p_sys->i_areas-1] = p_area;
 204     }
 205     fclose( p_file );
 206     return VLC_SUCCESS;
 207 }
 208
 209 /*****************************************************************************
 210  * Init: initialize Motion detect video thread output method
 211  *****************************************************************************/
 212 static int Init( vout_thread_t *p_vout )
 213 {
 214     int i_index;
 215     picture_t *p_pic;
 216     video_format_t fmt = {0};
 217
 218     I_OUTPUTPICTURES = 0;
 219
 220     /* Initialize the output structure */
 221     p_vout->output.i_chroma = p_vout->render.i_chroma;
 222     p_vout->output.i_width  = p_vout->render.i_width;
 223     p_vout->output.i_height = p_vout->render.i_height;
 224     p_vout->output.i_aspect = p_vout->render.i_aspect;
 225
 226     fmt.i_width = fmt.i_visible_width = p_vout->render.i_width;
 227     fmt.i_height = fmt.i_visible_height = p_vout->render.i_height;
 228     fmt.i_x_offset = fmt.i_y_offset = 0;
 229     fmt.i_chroma = p_vout->render.i_chroma;
 230     fmt.i_aspect = p_vout->render.i_aspect;
 231     fmt.i_sar_num = p_vout->render.i_aspect * fmt.i_height / fmt.i_width;
 232     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 233
 234     /* Try to open the real video output */
 235     msg_Dbg( p_vout, "spawning the real video output" );
 236
 237     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 238
 239     /* Everything failed */
 240     if( p_vout->p_sys->p_vout == NULL )
 241     {
 242         msg_Err( p_vout, "cannot open vout, aborting" );
 243         return VLC_EGENERIC;
 244     }
 245
 246     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 247
 248     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 249
 250     ADD_PARENT_CALLBACKS( SendEventsToChild );
 251
 252     return VLC_SUCCESS;
 253 }
 254
 255 /*****************************************************************************
 256  * End: terminate Motion detect video thread output method
 257  *****************************************************************************/
 258 static void End( vout_thread_t *p_vout )
 259 {
 260     int i_index;
 261
 262     /* Free the fake output buffers we allocated */
 263     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 264     {
 265         i_index--;
 266         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 267     }
 268 }
 269
 270 /*****************************************************************************
 271  * Destroy: destroy Motion detect video thread output method
 272  *****************************************************************************
 273  * Terminate an output method created by DistortCreateOutputMethod
 274  *****************************************************************************/
 275 static void Destroy( vlc_object_t *p_this )
 276 {
 277     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 278     int i;
 279
 280     if( p_vout->p_sys->p_vout )
 281     {
 282         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 283         vlc_object_detach( p_vout->p_sys->p_vout );
 284         vout_Destroy( p_vout->p_sys->p_vout );
 285     }
 286
 287     DEL_PARENT_CALLBACKS( SendEventsToChild );
 288
 289     for( i = 0 ; i < p_vout->p_sys->i_areas ; i++ )
 290     {
 291         free( p_vout->p_sys->pp_areas[i]->psz_mrl );
 292         free( p_vout->p_sys->pp_areas[i] );
 293     }
 294
 295     free( p_vout->p_sys->pp_areas );
 296     free( p_vout->p_sys );
 297 }
 298
 299 /*****************************************************************************
 300  * Render: displays previously rendered output
 301  *****************************************************************************
 302  * This function send the currently rendered image to Distort image, waits
 303  * until it is displayed and switch the two rendering buffers, preparing next
 304  * frame.
 305  *****************************************************************************/
 306 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 307 {
 308     picture_t *p_outpic;
 309
 310     /* This is a new frame. Get a structure from the video_output. */
 311     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 312               == NULL )
 313     {
 314         if( p_vout->b_die || p_vout->b_error )
 315         {
 316             return;
 317         }
 318         msleep( VOUT_OUTMEM_SLEEP );
 319     }
 320
 321     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 322
 323     MotionDetect( p_vout, p_pic, p_outpic );
 324
 325     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 326 }
 327
 328 /*****************************************************************************
 329  * MotionDetect: calculates new matches
 330  *****************************************************************************/
 331 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
 332                                                  picture_t *p_outpic )
 333 {
 334 #define pp_curent_area p_vout->p_sys->pp_areas[i_area]
 335
 336     int i_index, i_index_col, i_area;
 337     for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
 338     {
 339         int i_line, i_num_lines, i_offset, i_size, i_diff;
 340         uint8_t *p_in, *p_out, *p_last_in, *p_buffer;
 341
 342         p_in = p_inpic->p[i_index].p_pixels;
 343         p_out = p_outpic->p[i_index].p_pixels;
 344
 345         i_num_lines = p_inpic->p[i_index].i_visible_lines;
 346         i_size = p_inpic->p[i_index].i_lines * p_inpic->p[i_index].i_pitch;
 347
 348         p_vout->p_vlc->pf_memcpy( p_out, p_in, i_size );
 349         switch( i_index )
 350         {
 351         case Y_PLANE:
 352             p_buffer = p_vout->p_sys->p_bufferY;
 353
 354             if( p_buffer == NULL)
 355             {
 356                 p_buffer = malloc( p_vout->p_sys->i_history * i_size);
 357                 memset( p_buffer, 0, p_vout->p_sys->i_history * i_size );
 358
 359                 p_vout->p_sys->p_bufferY = p_buffer;
 360                 p_vout->p_sys->i_stack = 0;
 361             }
 362
 363             i_offset = i_size * p_vout->p_sys->i_stack;
 364             p_last_in = p_buffer + i_offset;
 365             for( i_area = 0 ; i_area < p_vout->p_sys->i_areas ; i_area++)
 366             {
 367                 int i_tmp = 0, i_nb_pixels;
 368                 p_last_in = p_buffer + i_offset;
 369                 p_in = p_inpic->p[i_index].p_pixels;
 370                 p_out = p_outpic->p[i_index].p_pixels;
 371                 if( ( pp_curent_area->i_y1 > p_inpic->p[i_index].i_lines ) ||
 372                     ( pp_curent_area->i_x1 > p_inpic->p[i_index].i_pitch ) )
 373                     continue;
 374                 if( ( pp_curent_area->i_y2 > p_inpic->p[i_index].i_lines ) )
 375                     pp_curent_area->i_y2 = p_inpic->p[i_index].i_lines;
 376                 if( ( pp_curent_area->i_x2 > p_inpic->p[i_index].i_pitch ) )
 377                     pp_curent_area->i_x2 = p_inpic->p[i_index].i_pitch;
 378
 379                 for( i_line = pp_curent_area->i_y1 ;
 380                      i_line < pp_curent_area->i_y2 ; i_line++ )
 381                 {
 382                     for( i_index_col = pp_curent_area->i_x1 ;
 383                          i_index_col < pp_curent_area->i_x2 ; i_index_col++ )
 384                     {
 385                         i_diff = (*(p_last_in + i_index_col +
 386                                         i_line * p_inpic->p[i_index].i_pitch)
 387                                 - *(p_in      + i_index_col +
 388                                         i_line * p_inpic->p[i_index].i_pitch));
 389                         if( i_diff < 0)
 390                             i_diff = -i_diff;
 391
 392                         if( i_diff > pp_curent_area->i_level )
 393                             i_tmp += pp_curent_area->i_upspeed;
 394
 395                         *( p_out + i_index_col + i_line *
 396                                         p_inpic->p[i_index].i_pitch ) =
 397                                                 pp_curent_area->i_matches;
 398                     }
 399                 }
 400                 i_nb_pixels = ( pp_curent_area->i_y2 - pp_curent_area->i_y1 ) *
 401                               ( pp_curent_area->i_x2 - pp_curent_area->i_x1 );
 402                 pp_curent_area->i_matches += i_tmp / i_nb_pixels -
 403                                     pp_curent_area->i_downspeed;
 404                 if( pp_curent_area->i_matches < 0)
 405                     pp_curent_area->i_matches = 0;
 406                 if( pp_curent_area->i_matches > 255)
 407                 {
 408                     playlist_item_t *p_item = playlist_ItemNew( p_vout,
 409                                         (const char*)pp_curent_area->psz_mrl,
 410                                         pp_curent_area->psz_mrl );
 411                     msg_Dbg( p_vout, "Area(%d) matched, going to %s\n", i_area,
 412                                         pp_curent_area->psz_mrl );
 413                     playlist_Control( p_vout->p_sys->p_playlist,
 414                                         PLAYLIST_ITEMPLAY, p_item );
 415                     pp_curent_area->i_matches = 0;
 416                 }
 417             }
 418             p_last_in = p_buffer + i_offset;
 419             p_in = p_inpic->p[i_index].p_pixels;
 420             p_out = p_outpic->p[i_index].p_pixels;
 421
 422             p_vout->p_vlc->pf_memcpy( p_last_in, p_in, i_size );
 423             break;
 424         default:
 425             break;
 426         }
 427     }
 428     p_vout->p_sys->i_stack++;
 429     if( p_vout->p_sys->i_stack >= p_vout->p_sys->i_history )
 430         p_vout->p_sys->i_stack = 0;
 431 #undef pp_curent_area
 432 }
 433
 434 /*****************************************************************************
 435  * SendEvents: forward mouse and keyboard events to the parent p_vout
 436  *****************************************************************************/
 437 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 438                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 439 {
 440     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 441
 442     return VLC_SUCCESS;
 443 }
 444
 445 /*****************************************************************************
 446  * SendEventsToChild: forward events to the child/children vout
 447  *****************************************************************************/
 448 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 449                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 450 {
 451     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 452     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 453     return VLC_SUCCESS;
 454 }