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 /// \bug [String] typo
  59 #define HISTORY_LONGTEXT N_("The umber of frames used for detection.")
  60
  61 vlc_module_begin();
  62     set_description( _("Motion detect video filter") );
  63     set_shortname( _( "Motion detect" ));
  64     set_category( CAT_VIDEO );
  65     set_subcategory( SUBCAT_VIDEO_VFILTER );
  66     set_capability( "video filter", 0 );
  67
  68     add_integer( "motiondetect-history", 1, NULL, HISTORY_TEXT,
  69                                 HISTORY_LONGTEXT, VLC_FALSE );
  70     add_string( "motiondetect-description", "motiondetect", NULL, DESC_TEXT,
  71                                 DESC_LONGTEXT, VLC_FALSE );
  72
  73     set_callbacks( Create, Destroy );
  74 vlc_module_end();
  75
  76 /*****************************************************************************
  77  * vout_sys_t: Motion detect video output method descriptor
  78  *****************************************************************************
  79  * This structure is part of the video output thread descriptor.
  80  * It describes the Motion detect specific properties of an output thread.
  81  *****************************************************************************/
  82 typedef struct area_t
  83 {
  84     int i_x1, i_y1;
  85     int i_x2, i_y2;
  86     int i_matches;
  87     int i_level;
  88     int i_downspeed, i_upspeed;
  89     char *psz_mrl;
  90 } area_t;
  91
  92 struct vout_sys_t
  93 {
  94     vout_thread_t *p_vout;
  95     playlist_t *p_playlist;
  96
  97     uint8_t *p_bufferY;
  98     int i_stack;
  99     area_t** pp_areas;
 100     int i_areas;
 101     int i_history;
 102 };
 103
 104 /*****************************************************************************
 105  * Control: control facility for the vout (forwards to child vout)
 106  *****************************************************************************/
 107 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 108 {
 109     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 110 }
 111
 112 /*****************************************************************************
 113  * Create: allocates Distort video thread output method
 114  *****************************************************************************
 115  * This function allocates and initializes a Distort vout method.
 116  *****************************************************************************/
 117 static int Create( vlc_object_t *p_this )
 118 {
 119     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 120     char *psz_descfilename;
 121     char buffer[256];
 122     int x1, x2, y1, y2, i_level, i_downspeed, i_upspeed, i;
 123     area_t *p_area;
 124     FILE * p_file;
 125
 126     /* Allocate structure */
 127     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 128     if( p_vout->p_sys == NULL )
 129     {
 130         msg_Err( p_vout, "out of memory" );
 131         return VLC_ENOMEM;
 132     }
 133
 134     p_vout->pf_init = Init;
 135     p_vout->pf_end = End;
 136     p_vout->pf_manage = NULL;
 137     p_vout->pf_render = Render;
 138     p_vout->pf_display = NULL;
 139     p_vout->pf_control = Control;
 140
 141     memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
 142
 143     p_vout->p_sys->i_history = config_GetInt( p_vout,
 144                                               "motiondetect-history" );
 145
 146     if( !(psz_descfilename = config_GetPsz( p_vout,
 147                                             "motiondetect-description" ) ) )
 148     {
 149         free( p_vout->p_sys );
 150         return VLC_EGENERIC;
 151     }
 152
 153     p_vout->p_sys->p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
 154                                                  FIND_ANYWHERE );
 155     if( !p_vout->p_sys->p_playlist )
 156     {
 157          msg_Err( p_vout, "playlist not found" );
 158          free( p_vout->p_sys );
 159          return VLC_EGENERIC;
 160     }
 161
 162     /* Parse description file and allocate areas */
 163     p_file = utf8_fopen( psz_descfilename, "r" );
 164     if( !p_file )
 165     {
 166         msg_Err( p_this, "Failed to open description file %s",
 167                             psz_descfilename );
 168         free( psz_descfilename );
 169         free( p_vout->p_sys );
 170         return VLC_EGENERIC;
 171     }
 172     p_vout->p_sys->i_areas = 0;
 173     while( fscanf( p_file, "%d,%d,%d,%d,%d,%d,%d,",
 174                             &x1, &y1, &x2, &y2, &i_level,
 175                             &i_downspeed, &i_upspeed ) == 7 )
 176     {
 177         for( i = 0 ; i < 255 ; i++ )
 178         {
 179             fread( buffer + i, 1, 1, p_file );
 180             if( *( buffer + i ) == '\n' )
 181                 break;
 182         }
 183         *( buffer + i )  = 0;
 184         p_vout->p_sys->i_areas++;
 185         p_vout->p_sys->pp_areas = realloc( p_vout->p_sys->pp_areas,
 186                                         p_vout->p_sys->i_areas *
 187                                                     sizeof( area_t ) );
 188         if( !p_vout->p_sys->pp_areas )
 189             /*FIXME: clean this... */
 190             return VLC_ENOMEM;
 191         p_area = malloc( sizeof( area_t ) );
 192         if( !p_area )
 193             break;
 194
 195         p_area->i_x1 = x1;
 196         p_area->i_x2 = x2;
 197         p_area->i_y1 = y1;
 198         p_area->i_y2 = y2;
 199         p_area->i_matches = 0;
 200         p_area->i_level = i_level;
 201         p_area->i_downspeed = i_downspeed;
 202         p_area->i_upspeed = i_upspeed;
 203
 204         p_area->psz_mrl = strdup(buffer);
 205         p_vout->p_sys->pp_areas[p_vout->p_sys->i_areas-1] = p_area;
 206     }
 207     fclose( p_file );
 208     return VLC_SUCCESS;
 209 }
 210
 211 /*****************************************************************************
 212  * Init: initialize Motion detect video thread output method
 213  *****************************************************************************/
 214 static int Init( vout_thread_t *p_vout )
 215 {
 216     int i_index;
 217     picture_t *p_pic;
 218     video_format_t fmt = {0};
 219
 220     I_OUTPUTPICTURES = 0;
 221
 222     /* Initialize the output structure */
 223     p_vout->output.i_chroma = p_vout->render.i_chroma;
 224     p_vout->output.i_width  = p_vout->render.i_width;
 225     p_vout->output.i_height = p_vout->render.i_height;
 226     p_vout->output.i_aspect = p_vout->render.i_aspect;
 227     p_vout->fmt_out = p_vout->fmt_in;
 228     fmt = p_vout->fmt_out;
 229
 230     /* Try to open the real video output */
 231     msg_Dbg( p_vout, "spawning the real video output" );
 232
 233     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 234
 235     /* Everything failed */
 236     if( p_vout->p_sys->p_vout == NULL )
 237     {
 238         msg_Err( p_vout, "cannot open vout, aborting" );
 239         return VLC_EGENERIC;
 240     }
 241
 242     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 243
 244     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 245
 246     ADD_PARENT_CALLBACKS( SendEventsToChild );
 247
 248     return VLC_SUCCESS;
 249 }
 250
 251 /*****************************************************************************
 252  * End: terminate Motion detect video thread output method
 253  *****************************************************************************/
 254 static void End( vout_thread_t *p_vout )
 255 {
 256     int i_index;
 257
 258     /* Free the fake output buffers we allocated */
 259     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 260     {
 261         i_index--;
 262         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 263     }
 264 }
 265
 266 /*****************************************************************************
 267  * Destroy: destroy Motion detect video thread output method
 268  *****************************************************************************
 269  * Terminate an output method created by DistortCreateOutputMethod
 270  *****************************************************************************/
 271 static void Destroy( vlc_object_t *p_this )
 272 {
 273     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 274     int i;
 275
 276     if( p_vout->p_sys->p_vout )
 277     {
 278         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 279         vlc_object_detach( p_vout->p_sys->p_vout );
 280         vout_Destroy( p_vout->p_sys->p_vout );
 281     }
 282
 283     DEL_PARENT_CALLBACKS( SendEventsToChild );
 284
 285     for( i = 0 ; i < p_vout->p_sys->i_areas ; i++ )
 286     {
 287         free( p_vout->p_sys->pp_areas[i]->psz_mrl );
 288         free( p_vout->p_sys->pp_areas[i] );
 289     }
 290
 291     free( p_vout->p_sys->pp_areas );
 292     free( p_vout->p_sys );
 293 }
 294
 295 /*****************************************************************************
 296  * Render: displays previously rendered output
 297  *****************************************************************************
 298  * This function send the currently rendered image to Distort image, waits
 299  * until it is displayed and switch the two rendering buffers, preparing next
 300  * frame.
 301  *****************************************************************************/
 302 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 303 {
 304     picture_t *p_outpic;
 305
 306     /* This is a new frame. Get a structure from the video_output. */
 307     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 308               == NULL )
 309     {
 310         if( p_vout->b_die || p_vout->b_error )
 311         {
 312             return;
 313         }
 314         msleep( VOUT_OUTMEM_SLEEP );
 315     }
 316
 317     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 318
 319     MotionDetect( p_vout, p_pic, p_outpic );
 320
 321     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 322 }
 323
 324 /*****************************************************************************
 325  * MotionDetect: calculates new matches
 326  *****************************************************************************/
 327 static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
 328                                                  picture_t *p_outpic )
 329 {
 330 #define pp_curent_area p_vout->p_sys->pp_areas[i_area]
 331
 332     int i_index, i_index_col, i_area;
 333     for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
 334     {
 335         int i_line, i_num_lines, i_offset, i_size, i_diff;
 336         uint8_t *p_in, *p_out, *p_last_in, *p_buffer;
 337
 338         p_in = p_inpic->p[i_index].p_pixels;
 339         p_out = p_outpic->p[i_index].p_pixels;
 340
 341         i_num_lines = p_inpic->p[i_index].i_visible_lines;
 342         i_size = p_inpic->p[i_index].i_lines * p_inpic->p[i_index].i_pitch;
 343
 344         p_vout->p_libvlc->pf_memcpy( p_out, p_in, i_size );
 345         switch( i_index )
 346         {
 347         case Y_PLANE:
 348             p_buffer = p_vout->p_sys->p_bufferY;
 349
 350             if( p_buffer == NULL)
 351             {
 352                 p_buffer = malloc( p_vout->p_sys->i_history * i_size);
 353                 memset( p_buffer, 0, p_vout->p_sys->i_history * i_size );
 354
 355                 p_vout->p_sys->p_bufferY = p_buffer;
 356                 p_vout->p_sys->i_stack = 0;
 357             }
 358
 359             i_offset = i_size * p_vout->p_sys->i_stack;
 360             p_last_in = p_buffer + i_offset;
 361             for( i_area = 0 ; i_area < p_vout->p_sys->i_areas ; i_area++)
 362             {
 363                 int i_tmp = 0, i_nb_pixels;
 364                 p_last_in = p_buffer + i_offset;
 365                 p_in = p_inpic->p[i_index].p_pixels;
 366                 p_out = p_outpic->p[i_index].p_pixels;
 367                 if( ( pp_curent_area->i_y1 > p_inpic->p[i_index].i_lines ) ||
 368                     ( pp_curent_area->i_x1 > p_inpic->p[i_index].i_pitch ) )
 369                     continue;
 370                 if( ( pp_curent_area->i_y2 > p_inpic->p[i_index].i_lines ) )
 371                     pp_curent_area->i_y2 = p_inpic->p[i_index].i_lines;
 372                 if( ( pp_curent_area->i_x2 > p_inpic->p[i_index].i_pitch ) )
 373                     pp_curent_area->i_x2 = p_inpic->p[i_index].i_pitch;
 374
 375                 for( i_line = pp_curent_area->i_y1 ;
 376                      i_line < pp_curent_area->i_y2 ; i_line++ )
 377                 {
 378                     for( i_index_col = pp_curent_area->i_x1 ;
 379                          i_index_col < pp_curent_area->i_x2 ; i_index_col++ )
 380                     {
 381                         i_diff = (*(p_last_in + i_index_col +
 382                                         i_line * p_inpic->p[i_index].i_pitch)
 383                                 - *(p_in      + i_index_col +
 384                                         i_line * p_inpic->p[i_index].i_pitch));
 385                         if( i_diff < 0)
 386                             i_diff = -i_diff;
 387
 388                         if( i_diff > pp_curent_area->i_level )
 389                             i_tmp += pp_curent_area->i_upspeed;
 390
 391                         *( p_out + i_index_col + i_line *
 392                                         p_inpic->p[i_index].i_pitch ) =
 393                                                 pp_curent_area->i_matches;
 394                     }
 395                 }
 396                 i_nb_pixels = ( pp_curent_area->i_y2 - pp_curent_area->i_y1 ) *
 397                               ( pp_curent_area->i_x2 - pp_curent_area->i_x1 );
 398                 pp_curent_area->i_matches += i_tmp / i_nb_pixels -
 399                                     pp_curent_area->i_downspeed;
 400                 if( pp_curent_area->i_matches < 0)
 401                     pp_curent_area->i_matches = 0;
 402                 if( pp_curent_area->i_matches > 255)
 403                 {
 404                     playlist_item_t *p_item = playlist_ItemNew( p_vout,
 405                                         (const char*)pp_curent_area->psz_mrl,
 406                                         pp_curent_area->psz_mrl );
 407                     msg_Dbg( p_vout, "Area(%d) matched, going to %s\n", i_area,
 408                                         pp_curent_area->psz_mrl );
 409                     playlist_Control( p_vout->p_sys->p_playlist,
 410                                         PLAYLIST_VIEWPLAY, NULL, p_item );
 411                     pp_curent_area->i_matches = 0;
 412                 }
 413             }
 414             p_last_in = p_buffer + i_offset;
 415             p_in = p_inpic->p[i_index].p_pixels;
 416             p_out = p_outpic->p[i_index].p_pixels;
 417
 418             p_vout->p_libvlc->pf_memcpy( p_last_in, p_in, i_size );
 419             break;
 420         default:
 421             break;
 422         }
 423     }
 424     p_vout->p_sys->i_stack++;
 425     if( p_vout->p_sys->i_stack >= p_vout->p_sys->i_history )
 426         p_vout->p_sys->i_stack = 0;
 427 #undef pp_curent_area
 428 }
 429
 430 /*****************************************************************************
 431  * SendEvents: forward mouse and keyboard events to the parent p_vout
 432  *****************************************************************************/
 433 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 434                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 435 {
 436     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 437
 438     return VLC_SUCCESS;
 439 }
 440
 441 /*****************************************************************************
 442  * SendEventsToChild: forward events to the child/children vout
 443  *****************************************************************************/
 444 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 445                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 446 {
 447     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 448     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 449     return VLC_SUCCESS;
 450 }