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     video_format_t fmt = {0};
 215
 216     I_OUTPUTPICTURES = 0;
 217
 218     /* Initialize the output structure */
 219     p_vout->output.i_chroma = p_vout->render.i_chroma;
 220     p_vout->output.i_width  = p_vout->render.i_width;
 221     p_vout->output.i_height = p_vout->render.i_height;
 222     p_vout->output.i_aspect = p_vout->render.i_aspect;
 223
 224     fmt.i_width = fmt.i_visible_width = p_vout->render.i_width;
 225     fmt.i_height = fmt.i_visible_height = p_vout->render.i_height;
 226     fmt.i_x_offset = fmt.i_y_offset = 0;
 227     fmt.i_chroma = p_vout->render.i_chroma;
 228     fmt.i_aspect = p_vout->render.i_aspect;
 229     fmt.i_sar_num = p_vout->render.i_aspect * fmt.i_height / fmt.i_width;
 230     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 231
 232     /* Try to open the real video output */
 233     msg_Dbg( p_vout, "spawning the real video output" );
 234
 235     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 236
 237     /* Everything failed */
 238     if( p_vout->p_sys->p_vout == NULL )
 239     {
 240         msg_Err( p_vout, "cannot open vout, aborting" );
 241         return VLC_EGENERIC;
 242     }
 243
 244     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 245
 246     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 247
 248     ADD_PARENT_CALLBACKS( SendEventsToChild );
 249
 250     return VLC_SUCCESS;
 251 }
 252
 253 /*****************************************************************************
 254  * End: terminate Motion detect video thread output method
 255  *****************************************************************************/
 256 static void End( vout_thread_t *p_vout )
 257 {
 258     int i_index;
 259
 260     /* Free the fake output buffers we allocated */
 261     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 262     {
 263         i_index--;
 264         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 265     }
 266 }
 267
 268 /*****************************************************************************
 269  * Destroy: destroy Motion detect video thread output method
 270  *****************************************************************************
 271  * Terminate an output method created by DistortCreateOutputMethod
 272  *****************************************************************************/
 273 static void Destroy( vlc_object_t *p_this )
 274 {
 275     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 276     int i;
 277
 278     if( p_vout->p_sys->p_vout )
 279     {
 280         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 281         vlc_object_detach( p_vout->p_sys->p_vout );
 282         vout_Destroy( p_vout->p_sys->p_vout );
 283     }
 284
 285     DEL_PARENT_CALLBACKS( SendEventsToChild );
 286
 287     for( i = 0 ; i < p_vout->p_sys->i_areas ; i++ )
 288     {
 289         free( p_vout->p_sys->pp_areas[i]->psz_mrl );
 290         free( p_vout->p_sys->pp_areas[i] );
 291     }
 292
 293     free( p_vout->p_sys->pp_areas );
 294     free( p_vout->p_sys );
 295 }
 296
 297 /*****************************************************************************
 298  * Render: displays previously rendered output
 299  *****************************************************************************
 300  * This function send the currently rendered image to Distort image, waits
 301  * until it is displayed and switch the two rendering buffers, preparing next
 302  * frame.
 303  *****************************************************************************/
 304 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 305 {
 306     picture_t *p_outpic;
 307
 308     /* This is a new frame. Get a structure from the video_output. */
 309     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 310               == NULL )
 311     {
 312         if( p_vout->b_die || p_vout->b_error )
 313         {
 314             return;
 315         }
 316         msleep( VOUT_OUTMEM_SLEEP );
 317     }
 318
 319     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 320
 321     MotionDetect( p_vout, p_pic, p_outpic );
 322
 323     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 324 }
 325
 326 /*****************************************************************************
 327  * MotionDetect: calculates new matches
 328  *****************************************************************************/
 329 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
 330                                                  picture_t *p_outpic )
 331 {
 332 #define pp_curent_area p_vout->p_sys->pp_areas[i_area]
 333
 334     int i_index, i_index_col, i_area;
 335     for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
 336     {
 337         int i_line, i_num_lines, i_offset, i_size, i_diff;
 338         uint8_t *p_in, *p_out, *p_last_in, *p_buffer;
 339
 340         p_in = p_inpic->p[i_index].p_pixels;
 341         p_out = p_outpic->p[i_index].p_pixels;
 342
 343         i_num_lines = p_inpic->p[i_index].i_visible_lines;
 344         i_size = p_inpic->p[i_index].i_lines * p_inpic->p[i_index].i_pitch;
 345
 346         p_vout->p_vlc->pf_memcpy( p_out, p_in, i_size );
 347         switch( i_index )
 348         {
 349         case Y_PLANE:
 350             p_buffer = p_vout->p_sys->p_bufferY;
 351
 352             if( p_buffer == NULL)
 353             {
 354                 p_buffer = malloc( p_vout->p_sys->i_history * i_size);
 355                 memset( p_buffer, 0, p_vout->p_sys->i_history * i_size );
 356
 357                 p_vout->p_sys->p_bufferY = p_buffer;
 358                 p_vout->p_sys->i_stack = 0;
 359             }
 360
 361             i_offset = i_size * p_vout->p_sys->i_stack;
 362             p_last_in = p_buffer + i_offset;
 363             for( i_area = 0 ; i_area < p_vout->p_sys->i_areas ; i_area++)
 364             {
 365                 int i_tmp = 0, i_nb_pixels;
 366                 p_last_in = p_buffer + i_offset;
 367                 p_in = p_inpic->p[i_index].p_pixels;
 368                 p_out = p_outpic->p[i_index].p_pixels;
 369                 if( ( pp_curent_area->i_y1 > p_inpic->p[i_index].i_lines ) ||
 370                     ( pp_curent_area->i_x1 > p_inpic->p[i_index].i_pitch ) )
 371                     continue;
 372                 if( ( pp_curent_area->i_y2 > p_inpic->p[i_index].i_lines ) )
 373                     pp_curent_area->i_y2 = p_inpic->p[i_index].i_lines;
 374                 if( ( pp_curent_area->i_x2 > p_inpic->p[i_index].i_pitch ) )
 375                     pp_curent_area->i_x2 = p_inpic->p[i_index].i_pitch;
 376
 377                 for( i_line = pp_curent_area->i_y1 ;
 378                      i_line < pp_curent_area->i_y2 ; i_line++ )
 379                 {
 380                     for( i_index_col = pp_curent_area->i_x1 ;
 381                          i_index_col < pp_curent_area->i_x2 ; i_index_col++ )
 382                     {
 383                         i_diff = (*(p_last_in + i_index_col +
 384                                         i_line * p_inpic->p[i_index].i_pitch)
 385                                 - *(p_in      + i_index_col +
 386                                         i_line * p_inpic->p[i_index].i_pitch));
 387                         if( i_diff < 0)
 388                             i_diff = -i_diff;
 389
 390                         if( i_diff > pp_curent_area->i_level )
 391                             i_tmp += pp_curent_area->i_upspeed;
 392
 393                         *( p_out + i_index_col + i_line *
 394                                         p_inpic->p[i_index].i_pitch ) =
 395                                                 pp_curent_area->i_matches;
 396                     }
 397                 }
 398                 i_nb_pixels = ( pp_curent_area->i_y2 - pp_curent_area->i_y1 ) *
 399                               ( pp_curent_area->i_x2 - pp_curent_area->i_x1 );
 400                 pp_curent_area->i_matches += i_tmp / i_nb_pixels -
 401                                     pp_curent_area->i_downspeed;
 402                 if( pp_curent_area->i_matches < 0)
 403                     pp_curent_area->i_matches = 0;
 404                 if( pp_curent_area->i_matches > 255)
 405                 {
 406                     playlist_item_t *p_item = playlist_ItemNew( p_vout,
 407                                         (const char*)pp_curent_area->psz_mrl,
 408                                         pp_curent_area->psz_mrl );
 409                     msg_Dbg( p_vout, "Area(%d) matched, going to %s\n", i_area,
 410                                         pp_curent_area->psz_mrl );
 411                     playlist_Control( p_vout->p_sys->p_playlist,
 412                                         PLAYLIST_ITEMPLAY, p_item );
 413                     pp_curent_area->i_matches = 0;
 414                 }
 415             }
 416             p_last_in = p_buffer + i_offset;
 417             p_in = p_inpic->p[i_index].p_pixels;
 418             p_out = p_outpic->p[i_index].p_pixels;
 419
 420             p_vout->p_vlc->pf_memcpy( p_last_in, p_in, i_size );
 421             break;
 422         default:
 423             break;
 424         }
 425     }
 426     p_vout->p_sys->i_stack++;
 427     if( p_vout->p_sys->i_stack >= p_vout->p_sys->i_history )
 428         p_vout->p_sys->i_stack = 0;
 429 #undef pp_curent_area
 430 }
 431
 432 /*****************************************************************************
 433  * SendEvents: forward mouse and keyboard events to the parent p_vout
 434  *****************************************************************************/
 435 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 436                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 437 {
 438     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 439
 440     return VLC_SUCCESS;
 441 }
 442
 443 /*****************************************************************************
 444  * SendEventsToChild: forward events to the child/children vout
 445  *****************************************************************************/
 446 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 447                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 448 {
 449     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 450     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 451     return VLC_SUCCESS;
 452 }