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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, 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 #include "charset.h"
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40 static int  Create    ( vlc_object_t * );
  41 static void Destroy   ( vlc_object_t * );
  42
  43 static int  Init      ( vout_thread_t * );
  44 static void End       ( vout_thread_t * );
  45 static void Render    ( vout_thread_t *, picture_t * );
  46 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
  47                                                  picture_t *p_outpic );
  48
  49 static int  SendEvents   ( vlc_object_t *, char const *,
  50                            vlc_value_t, vlc_value_t, void * );
  51
  52 /*****************************************************************************
  53  * Module descriptor
  54  *****************************************************************************/
  55 #define DESC_TEXT N_("Description file")
  56 #define DESC_LONGTEXT N_("A file containing a simple playlist")
  57 #define HISTORY_TEXT N_("History parameter")
  58 #define HISTORY_LONGTEXT N_("The umber of frames used for detection.")
  59
  60 vlc_module_begin();
  61     set_description( _("Motion detect video filter") );
  62     set_shortname( N_( "Motion detect" ));
  63     set_category( CAT_VIDEO );
  64     set_subcategory( SUBCAT_VIDEO_VFILTER );
  65     set_capability( "video filter", 0 );
  66
  67     add_integer( "motiondetect-history", 1, NULL, HISTORY_TEXT,
  68                                 HISTORY_LONGTEXT, VLC_FALSE );
  69     add_string( "motiondetect-description", "motiondetect", NULL, DESC_TEXT,
  70                                 DESC_LONGTEXT, VLC_FALSE );
  71
  72     set_callbacks( Create, Destroy );
  73 vlc_module_end();
  74
  75 /*****************************************************************************
  76  * vout_sys_t: Motion detect video output method descriptor
  77  *****************************************************************************
  78  * This structure is part of the video output thread descriptor.
  79  * It describes the Motion detect specific properties of an output thread.
  80  *****************************************************************************/
  81 typedef struct area_t
  82 {
  83     int i_x1, i_y1;
  84     int i_x2, i_y2;
  85     int i_matches;
  86     int i_level;
  87     int i_downspeed, i_upspeed;
  88     char *psz_mrl;
  89 } area_t;
  90
  91 struct vout_sys_t
  92 {
  93     vout_thread_t *p_vout;
  94     playlist_t *p_playlist;
  95
  96     uint8_t *p_bufferY;
  97     int i_stack;
  98     area_t** pp_areas;
  99     int i_areas;
 100     int i_history;
 101 };
 102
 103 /*****************************************************************************
 104  * Control: control facility for the vout (forwards to child vout)
 105  *****************************************************************************/
 106 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 107 {
 108     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 109 }
 110
 111 /*****************************************************************************
 112  * Create: allocates Distort video thread output method
 113  *****************************************************************************
 114  * This function allocates and initializes a Distort vout method.
 115  *****************************************************************************/
 116 static int Create( vlc_object_t *p_this )
 117 {
 118     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 119     char *psz_descfilename;
 120     char buffer[256];
 121     int x1, x2, y1, y2, i_level, i_downspeed, i_upspeed, i;
 122     area_t *p_area;
 123     FILE * p_file;
 124
 125     /* Allocate structure */
 126     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 127     if( p_vout->p_sys == NULL )
 128     {
 129         msg_Err( p_vout, "out of memory" );
 130         return VLC_ENOMEM;
 131     }
 132
 133     p_vout->pf_init = Init;
 134     p_vout->pf_end = End;
 135     p_vout->pf_manage = NULL;
 136     p_vout->pf_render = Render;
 137     p_vout->pf_display = NULL;
 138     p_vout->pf_control = Control;
 139
 140     memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
 141
 142     p_vout->p_sys->i_history = config_GetInt( p_vout,
 143                                               "motiondetect-history" );
 144
 145     if( !(psz_descfilename = config_GetPsz( p_vout,
 146                                             "motiondetect-description" ) ) )
 147     {
 148         free( p_vout->p_sys );
 149         return VLC_EGENERIC;
 150     }
 151
 152     p_vout->p_sys->p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
 153                                                  FIND_ANYWHERE );
 154     if( !p_vout->p_sys->p_playlist )
 155     {
 156          msg_Err( p_vout, "playlist not found" );
 157          free( p_vout->p_sys );
 158          return VLC_EGENERIC;
 159     }
 160
 161     /* Parse description file and allocate areas */
 162     p_file = utf8_fopen( psz_descfilename, "r" );
 163     if( !p_file )
 164     {
 165         msg_Err( p_this, "Failed to open description file %s",
 166                             psz_descfilename );
 167         free( psz_descfilename );
 168         free( p_vout->p_sys );
 169         return VLC_EGENERIC;
 170     }
 171     p_vout->p_sys->i_areas = 0;
 172     while( fscanf( p_file, "%d,%d,%d,%d,%d,%d,%d,",
 173                             &x1, &y1, &x2, &y2, &i_level,
 174                             &i_downspeed, &i_upspeed ) == 7 )
 175     {
 176         for( i = 0 ; i < 255 ; i++ )
 177         {
 178             fread( buffer + i, 1, 1, p_file );
 179             if( *( buffer + i ) == '\n' )
 180                 break;
 181         }
 182         *( buffer + i )  = 0;
 183         p_vout->p_sys->i_areas++;
 184         p_vout->p_sys->pp_areas = realloc( p_vout->p_sys->pp_areas,
 185                                         p_vout->p_sys->i_areas *
 186                                                     sizeof( area_t ) );
 187         if( !p_vout->p_sys->pp_areas )
 188             /*FIXME: clean this... */
 189             return VLC_ENOMEM;
 190         p_area = malloc( sizeof( area_t ) );
 191         if( !p_area )
 192             break;
 193
 194         p_area->i_x1 = x1;
 195         p_area->i_x2 = x2;
 196         p_area->i_y1 = y1;
 197         p_area->i_y2 = y2;
 198         p_area->i_matches = 0;
 199         p_area->i_level = i_level;
 200         p_area->i_downspeed = i_downspeed;
 201         p_area->i_upspeed = i_upspeed;
 202
 203         p_area->psz_mrl = strdup(buffer);
 204         p_vout->p_sys->pp_areas[p_vout->p_sys->i_areas-1] = p_area;
 205     }
 206     fclose( p_file );
 207     return VLC_SUCCESS;
 208 }
 209
 210 /*****************************************************************************
 211  * Init: initialize Motion detect video thread output method
 212  *****************************************************************************/
 213 static int Init( vout_thread_t *p_vout )
 214 {
 215     int i_index;
 216     picture_t *p_pic;
 217     video_format_t fmt = {0};
 218
 219     I_OUTPUTPICTURES = 0;
 220
 221     /* Initialize the output structure */
 222     p_vout->output.i_chroma = p_vout->render.i_chroma;
 223     p_vout->output.i_width  = p_vout->render.i_width;
 224     p_vout->output.i_height = p_vout->render.i_height;
 225     p_vout->output.i_aspect = p_vout->render.i_aspect;
 226     p_vout->fmt_out = p_vout->fmt_in;
 227     fmt = p_vout->fmt_out;
 228
 229     /* Try to open the real video output */
 230     msg_Dbg( p_vout, "spawning the real video output" );
 231
 232     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 233
 234     /* Everything failed */
 235     if( p_vout->p_sys->p_vout == NULL )
 236     {
 237         msg_Err( p_vout, "cannot open vout, aborting" );
 238         return VLC_EGENERIC;
 239     }
 240
 241     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 242
 243     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 244
 245     ADD_PARENT_CALLBACKS( SendEventsToChild );
 246
 247     return VLC_SUCCESS;
 248 }
 249
 250 /*****************************************************************************
 251  * End: terminate Motion detect video thread output method
 252  *****************************************************************************/
 253 static void End( vout_thread_t *p_vout )
 254 {
 255     int i_index;
 256
 257     /* Free the fake output buffers we allocated */
 258     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 259     {
 260         i_index--;
 261         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 262     }
 263 }
 264
 265 /*****************************************************************************
 266  * Destroy: destroy Motion detect video thread output method
 267  *****************************************************************************
 268  * Terminate an output method created by DistortCreateOutputMethod
 269  *****************************************************************************/
 270 static void Destroy( vlc_object_t *p_this )
 271 {
 272     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 273     int i;
 274
 275     if( p_vout->p_sys->p_vout )
 276     {
 277         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 278         vlc_object_detach( p_vout->p_sys->p_vout );
 279         vout_Destroy( p_vout->p_sys->p_vout );
 280     }
 281
 282     DEL_PARENT_CALLBACKS( SendEventsToChild );
 283
 284     for( i = 0 ; i < p_vout->p_sys->i_areas ; i++ )
 285     {
 286         free( p_vout->p_sys->pp_areas[i]->psz_mrl );
 287         free( p_vout->p_sys->pp_areas[i] );
 288     }
 289
 290     free( p_vout->p_sys->pp_areas );
 291     free( p_vout->p_sys );
 292 }
 293
 294 /*****************************************************************************
 295  * Render: displays previously rendered output
 296  *****************************************************************************
 297  * This function send the currently rendered image to Distort image, waits
 298  * until it is displayed and switch the two rendering buffers, preparing next
 299  * frame.
 300  *****************************************************************************/
 301 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 302 {
 303     picture_t *p_outpic;
 304
 305     /* This is a new frame. Get a structure from the video_output. */
 306     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 307               == NULL )
 308     {
 309         if( p_vout->b_die || p_vout->b_error )
 310         {
 311             return;
 312         }
 313         msleep( VOUT_OUTMEM_SLEEP );
 314     }
 315
 316     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 317
 318     MotionDetect( p_vout, p_pic, p_outpic );
 319
 320     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 321 }
 322
 323 /*****************************************************************************
 324  * MotionDetect: calculates new matches
 325  *****************************************************************************/
 326 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
 327                                                  picture_t *p_outpic )
 328 {
 329 #define pp_curent_area p_vout->p_sys->pp_areas[i_area]
 330
 331     int i_index, i_index_col, i_area;
 332     for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
 333     {
 334         int i_line, i_num_lines, i_offset, i_size, i_diff;
 335         uint8_t *p_in, *p_out, *p_last_in, *p_buffer;
 336
 337         p_in = p_inpic->p[i_index].p_pixels;
 338         p_out = p_outpic->p[i_index].p_pixels;
 339
 340         i_num_lines = p_inpic->p[i_index].i_visible_lines;
 341         i_size = p_inpic->p[i_index].i_lines * p_inpic->p[i_index].i_pitch;
 342
 343         p_vout->p_vlc->pf_memcpy( p_out, p_in, i_size );
 344         switch( i_index )
 345         {
 346         case Y_PLANE:
 347             p_buffer = p_vout->p_sys->p_bufferY;
 348
 349             if( p_buffer == NULL)
 350             {
 351                 p_buffer = malloc( p_vout->p_sys->i_history * i_size);
 352                 memset( p_buffer, 0, p_vout->p_sys->i_history * i_size );
 353
 354                 p_vout->p_sys->p_bufferY = p_buffer;
 355                 p_vout->p_sys->i_stack = 0;
 356             }
 357
 358             i_offset = i_size * p_vout->p_sys->i_stack;
 359             p_last_in = p_buffer + i_offset;
 360             for( i_area = 0 ; i_area < p_vout->p_sys->i_areas ; i_area++)
 361             {
 362                 int i_tmp = 0, i_nb_pixels;
 363                 p_last_in = p_buffer + i_offset;
 364                 p_in = p_inpic->p[i_index].p_pixels;
 365                 p_out = p_outpic->p[i_index].p_pixels;
 366                 if( ( pp_curent_area->i_y1 > p_inpic->p[i_index].i_lines ) ||
 367                     ( pp_curent_area->i_x1 > p_inpic->p[i_index].i_pitch ) )
 368                     continue;
 369                 if( ( pp_curent_area->i_y2 > p_inpic->p[i_index].i_lines ) )
 370                     pp_curent_area->i_y2 = p_inpic->p[i_index].i_lines;
 371                 if( ( pp_curent_area->i_x2 > p_inpic->p[i_index].i_pitch ) )
 372                     pp_curent_area->i_x2 = p_inpic->p[i_index].i_pitch;
 373
 374                 for( i_line = pp_curent_area->i_y1 ;
 375                      i_line < pp_curent_area->i_y2 ; i_line++ )
 376                 {
 377                     for( i_index_col = pp_curent_area->i_x1 ;
 378                          i_index_col < pp_curent_area->i_x2 ; i_index_col++ )
 379                     {
 380                         i_diff = (*(p_last_in + i_index_col +
 381                                         i_line * p_inpic->p[i_index].i_pitch)
 382                                 - *(p_in      + i_index_col +
 383                                         i_line * p_inpic->p[i_index].i_pitch));
 384                         if( i_diff < 0)
 385                             i_diff = -i_diff;
 386
 387                         if( i_diff > pp_curent_area->i_level )
 388                             i_tmp += pp_curent_area->i_upspeed;
 389
 390                         *( p_out + i_index_col + i_line *
 391                                         p_inpic->p[i_index].i_pitch ) =
 392                                                 pp_curent_area->i_matches;
 393                     }
 394                 }
 395                 i_nb_pixels = ( pp_curent_area->i_y2 - pp_curent_area->i_y1 ) *
 396                               ( pp_curent_area->i_x2 - pp_curent_area->i_x1 );
 397                 pp_curent_area->i_matches += i_tmp / i_nb_pixels -
 398                                     pp_curent_area->i_downspeed;
 399                 if( pp_curent_area->i_matches < 0)
 400                     pp_curent_area->i_matches = 0;
 401                 if( pp_curent_area->i_matches > 255)
 402                 {
 403                     playlist_item_t *p_item = playlist_ItemNew( p_vout,
 404                                         (const char*)pp_curent_area->psz_mrl,
 405                                         pp_curent_area->psz_mrl );
 406                     msg_Dbg( p_vout, "Area(%d) matched, going to %s\n", i_area,
 407                                         pp_curent_area->psz_mrl );
 408                     playlist_Control( p_vout->p_sys->p_playlist,
 409                                         PLAYLIST_ITEMPLAY, p_item );
 410                     pp_curent_area->i_matches = 0;
 411                 }
 412             }
 413             p_last_in = p_buffer + i_offset;
 414             p_in = p_inpic->p[i_index].p_pixels;
 415             p_out = p_outpic->p[i_index].p_pixels;
 416
 417             p_vout->p_vlc->pf_memcpy( p_last_in, p_in, i_size );
 418             break;
 419         default:
 420             break;
 421         }
 422     }
 423     p_vout->p_sys->i_stack++;
 424     if( p_vout->p_sys->i_stack >= p_vout->p_sys->i_history )
 425         p_vout->p_sys->i_stack = 0;
 426 #undef pp_curent_area
 427 }
 428
 429 /*****************************************************************************
 430  * SendEvents: forward mouse and keyboard events to the parent p_vout
 431  *****************************************************************************/
 432 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 433                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 434 {
 435     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 436
 437     return VLC_SUCCESS;
 438 }
 439
 440 /*****************************************************************************
 441  * SendEventsToChild: forward events to the child/children vout
 442  *****************************************************************************/
 443 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 444                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 445 {
 446     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 447     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 448     return VLC_SUCCESS;
 449 }