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

   1 /*****************************************************************************
   2  * opencv_wrapper.c : OpenCV wrapper video filter
   3  *****************************************************************************
   4  * Copyright (C) 2006 the VideoLAN team
   5  *
   6  * Authors: Dugal Harris <dugalh@protoclea.co.za>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26
  27 #include <cxcore.h>
  28 #include <cv.h>
  29 #include <highgui.h>
  30
  31 #ifdef HAVE_CONFIG_H
  32 # include "config.h"
  33 #endif
  34
  35 #include <vlc/vlc.h>
  36 #include <vlc_vout.h>
  37
  38 #include <math.h>
  39 #include <time.h>
  40
  41 #include "vlc_filter.h"
  42 #include "filter_common.h"
  43 #include <vlc_charset.h>
  44 #include "vlc_image.h"
  45 #include "vlc_input.h"
  46 #include "vlc_playlist.h"
  47
  48
  49 /*****************************************************************************
  50  * Local prototypes
  51  *****************************************************************************/
  52 static int  Create    ( vlc_object_t * );
  53 static void Destroy   ( vlc_object_t * );
  54
  55 static int  Init      ( vout_thread_t * );
  56 static void End       ( vout_thread_t * );
  57 static void Render    ( vout_thread_t *, picture_t * );
  58
  59 static int  SendEvents( vlc_object_t *, char const *,
  60                         vlc_value_t, vlc_value_t, void * );
  61 static void ReleaseImages( vout_thread_t *p_vout );
  62 static void VlcPictureToIplImage( vout_thread_t *p_vout, picture_t *p_in );
  63
  64 /*****************************************************************************
  65  * Module descriptor
  66  *****************************************************************************/
  67
  68 static char *chroma_list[] = { "input", "I420", "RGB32"};
  69 static char *chroma_list_text[] = { N_("Use input chroma unaltered"),
  70   N_("I420 - first plane is greyscale"), N_("RGB32")};
  71
  72 static char *output_list[] = { "none", "input", "processed"};
  73 static char *output_list_text[] = { N_("Don't display any video"),
  74   N_("Display the input video"), N_("Display the processed video")};
  75
  76 static char *verbosity_list[] = { "error", "warning", "debug"};
  77 static char *verbosity_list_text[] = { N_("Show only errors"),
  78   N_("Show errors and warnings"), N_("Show everything including debug messages")};
  79
  80 vlc_module_begin();
  81     set_description( _("OpenCV video filter wrapper") );
  82     set_shortname( _("OpenCV" ));
  83     set_category( CAT_VIDEO );
  84     set_subcategory( SUBCAT_VIDEO_VFILTER );
  85     set_capability( "video filter", 0 );
  86     add_shortcut( "opencv_wrapper" );
  87     set_callbacks( Create, Destroy );
  88     add_float_with_range( "opencv-scale", 1.0, 0.1, 2.0, NULL,
  89                           N_("Scale factor (0.1-2.0)"),
  90                           N_("Ammount by which to scale the picture before sending it to the internal OpenCV filter"),
  91                           false );
  92     add_string( "opencv-chroma", "input", NULL,
  93                           N_("OpenCV filter chroma"),
  94                           N_("Chroma to convert picture to before sending it to the internal OpenCV filter"), false);
  95         change_string_list( chroma_list, chroma_list_text, 0);
  96     add_string( "opencv-output", "input", NULL,
  97                           N_("Wrapper filter output"),
  98                           N_("Determines what (if any) video is displayed by the wrapper filter"), false);
  99         change_string_list( output_list, output_list_text, 0);
 100     add_string( "opencv-verbosity", "error", NULL,
 101                           N_("Wrapper filter verbosity"),
 102                           N_("Determines wrapper filter verbosity level"), false);
 103         change_string_list( verbosity_list, verbosity_list_text, 0);
 104     add_string( "opencv-filter-name", "none", NULL,
 105                           N_("OpenCV internal filter name"),
 106                           N_("Name of internal OpenCV plugin filter to use"), false);
 107 vlc_module_end();
 108
 109
 110 /*****************************************************************************
 111  * wrapper_output_t: what video is output
 112  *****************************************************************************/
 113 enum wrapper_output_t
 114 {
 115    NONE,    //not working yet
 116    VINPUT,
 117    PROCESSED
 118 };
 119
 120 /*****************************************************************************
 121  * internal_chroma_t: what chroma is sent to the internal opencv filter
 122  *****************************************************************************/
 123 enum internal_chroma_t
 124 {
 125    CINPUT,
 126    GREY,
 127    RGB
 128 };
 129
 130 /*****************************************************************************
 131  * verbosity_t:
 132  *****************************************************************************/
 133 enum verbosity_t
 134 {
 135    VERB_ERROR,
 136    VERB_WARN,
 137    VERB_DEBUG
 138 };
 139
 140 /*****************************************************************************
 141  * vout_sys_t: opencv_wrapper video output method descriptor
 142  *****************************************************************************
 143  * This structure is part of the video output thread descriptor.
 144  * It describes the opencv_wrapper specific properties of an output thread.
 145  *****************************************************************************/
 146 struct vout_sys_t
 147 {
 148     vout_thread_t *p_vout;
 149
 150     image_handler_t *p_image;
 151
 152     int i_cv_image_size;
 153
 154     picture_t *p_proc_image;
 155     picture_t *p_to_be_freed;
 156
 157     float f_scale;
 158
 159     int i_wrapper_output;
 160     int i_internal_chroma;
 161     int i_verbosity;
 162
 163     IplImage *p_cv_image[VOUT_MAX_PLANES];
 164
 165     filter_t *p_opencv;
 166     char* psz_inner_name;
 167
 168     picture_t hacked_pic;
 169 };
 170
 171 /*****************************************************************************
 172  * Control: control facility for the vout (forwards to child vout)
 173  *****************************************************************************/
 174 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 175 {
 176     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 177 }
 178
 179 /*****************************************************************************
 180  * Create: allocates opencv_wrapper video thread output method
 181  *****************************************************************************
 182  * This function allocates and initializes a opencv_wrapper vout method.
 183  *****************************************************************************/
 184 static int Create( vlc_object_t *p_this )
 185 {
 186     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 187     char *psz_chroma, *psz_output, *psz_verbosity;
 188     int i = 0;
 189
 190     /* Allocate structure */
 191     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 192     if( p_vout->p_sys == NULL )
 193     {
 194         msg_Err( p_vout, "out of memory" );
 195         return VLC_ENOMEM;
 196     }
 197
 198     /* Init structure */
 199     p_vout->p_sys->p_image = image_HandlerCreate( p_vout );
 200     for (i = 0; i < VOUT_MAX_PLANES; i++)
 201         p_vout->p_sys->p_cv_image[i] = NULL;
 202     p_vout->p_sys->p_proc_image = NULL;
 203     p_vout->p_sys->p_to_be_freed = NULL;
 204     p_vout->p_sys->i_cv_image_size = 0;
 205
 206     p_vout->pf_init = Init;
 207     p_vout->pf_end = End;
 208     p_vout->pf_manage = NULL;
 209     p_vout->pf_render = Render;
 210     p_vout->pf_display = NULL;
 211     p_vout->pf_control = Control;
 212
 213     /* Retrieve and apply config */
 214     if( !(psz_chroma = config_GetPsz( p_vout, "opencv-chroma" )) )
 215     {
 216         msg_Err( p_vout, "configuration variable %s empty, using 'grey'",
 217                          "opencv-chroma" );
 218         p_vout->p_sys->i_internal_chroma = GREY;
 219     }
 220     else
 221     {
 222         if( !strcmp( psz_chroma, "input" ) )
 223             p_vout->p_sys->i_internal_chroma = CINPUT;
 224         else if( !strcmp( psz_chroma, "I420" ) )
 225             p_vout->p_sys->i_internal_chroma = GREY;
 226         else if( !strcmp( psz_chroma, "RGB32" ) )
 227             p_vout->p_sys->i_internal_chroma = RGB;
 228         else
 229         {
 230             msg_Err( p_vout, "no valid opencv-chroma provided, using 'grey'" );
 231             p_vout->p_sys->i_internal_chroma = GREY;
 232         }
 233     }
 234     free( psz_chroma);
 235
 236     if( !(psz_output = config_GetPsz( p_vout, "opencv-output" )) )
 237     {
 238         msg_Err( p_vout, "configuration variable %s empty, using 'input'",
 239                          "opencv-output" );
 240         p_vout->p_sys->i_wrapper_output = VINPUT;
 241     }
 242     else
 243     {
 244         if( !strcmp( psz_output, "none" ) )
 245             p_vout->p_sys->i_wrapper_output = NONE;
 246         else if( !strcmp( psz_output, "input" ) )
 247             p_vout->p_sys->i_wrapper_output = VINPUT;
 248         else if( !strcmp( psz_output, "processed" ) )
 249             p_vout->p_sys->i_wrapper_output = PROCESSED;
 250         else
 251         {
 252             msg_Err( p_vout, "no valid opencv-output provided, using 'input'" );
 253             p_vout->p_sys->i_wrapper_output = VINPUT;
 254         }
 255     }
 256     free( psz_output);
 257
 258     if( !(psz_verbosity = config_GetPsz( p_vout, "opencv-verbosity" )) )
 259     {
 260         msg_Err( p_vout, "configuration variable %s empty, using 'input'",
 261                          "opencv-verbosity" );
 262         p_vout->p_sys->i_verbosity = VERB_ERROR;
 263     }
 264     else
 265     {
 266         if( !strcmp( psz_verbosity, "error" ) )
 267             p_vout->p_sys->i_verbosity = VERB_ERROR;
 268         else if( !strcmp( psz_verbosity, "warning" ) )
 269             p_vout->p_sys->i_verbosity = VERB_WARN;
 270         else if( !strcmp( psz_verbosity, "debug" ) )
 271             p_vout->p_sys->i_verbosity = VERB_DEBUG;
 272         else
 273         {
 274             msg_Err( p_vout, "no valid opencv-verbosity provided, using 'error'" );
 275             p_vout->p_sys->i_verbosity = VERB_ERROR;
 276         }
 277     }
 278     free( psz_verbosity);
 279
 280     p_vout->p_sys->psz_inner_name = config_GetPsz( p_vout, "opencv-filter-name" );
 281
 282     p_vout->p_sys->f_scale =
 283         config_GetFloat( p_vout, "opencv-scale" );
 284
 285     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 286         msg_Info(p_vout, "Configuration: opencv-scale: %f, opencv-chroma: %d, "
 287             "opencv-output: %d, opencv-verbosity %d, opencv-filter %s",
 288             p_vout->p_sys->f_scale,
 289             p_vout->p_sys->i_internal_chroma,
 290             p_vout->p_sys->i_wrapper_output,
 291             p_vout->p_sys->i_verbosity,
 292             p_vout->p_sys->psz_inner_name);
 293
 294     return VLC_SUCCESS;
 295 }
 296
 297 /*****************************************************************************
 298  * Init: initialize opencv_wrapper video thread output method
 299  *****************************************************************************/
 300 static int Init( vout_thread_t *p_vout )
 301 {
 302     int i_index;
 303     picture_t *p_pic;
 304     video_format_t fmt;
 305     vout_sys_t *p_sys = p_vout->p_sys;
 306     I_OUTPUTPICTURES = 0;
 307
 308     /* Initialize the output video format */
 309     memset( &fmt, 0, sizeof(video_format_t) );
 310     p_vout->output.i_chroma = p_vout->render.i_chroma;
 311     p_vout->output.i_width  = p_vout->render.i_width;
 312     p_vout->output.i_height = p_vout->render.i_height;
 313     p_vout->output.i_aspect = p_vout->render.i_aspect;
 314     p_vout->fmt_out = p_vout->fmt_in;           //set to input video format
 315
 316     fmt = p_vout->fmt_out;
 317     if (p_sys->i_wrapper_output == PROCESSED)   //set to processed video format
 318     {
 319         fmt.i_width = fmt.i_width * p_sys->f_scale;
 320         fmt.i_height = fmt.i_height * p_sys->f_scale;
 321         fmt.i_visible_width = fmt.i_visible_width * p_sys->f_scale;
 322         fmt.i_visible_height = fmt.i_visible_height * p_sys->f_scale;
 323         fmt.i_x_offset = fmt.i_x_offset * p_sys->f_scale;
 324         fmt.i_y_offset = fmt.i_y_offset * p_sys->f_scale;
 325
 326         if (p_sys->i_internal_chroma == GREY)
 327             fmt.i_chroma = VLC_FOURCC('I','4','2','0');
 328         else if (p_sys->i_internal_chroma == RGB)
 329             fmt.i_chroma = VLC_FOURCC('R','V','3','2');
 330     }
 331
 332     /* Load the internal opencv filter */
 333     /* We don't need to set up video formats for this filter as it not actually using a picture_t */
 334     p_sys->p_opencv = vlc_object_create( p_vout, sizeof(filter_t) );
 335     vlc_object_attach( p_sys->p_opencv, p_vout );
 336
 337     if (p_vout->p_sys->psz_inner_name)
 338         p_sys->p_opencv->p_module =
 339             module_Need( p_sys->p_opencv, p_sys->psz_inner_name, 0, 0 );
 340
 341     if( !p_sys->p_opencv->p_module )
 342     {
 343         msg_Err( p_vout, "can't open internal opencv filter: %s", p_vout->p_sys->psz_inner_name );
 344         p_vout->p_sys->psz_inner_name = NULL;
 345         vlc_object_detach( p_sys->p_opencv );
 346         vlc_object_release( p_sys->p_opencv );
 347         p_sys->p_opencv = NULL;
 348     }
 349
 350     /* Try to open the real video output */
 351     if (p_sys->i_verbosity > VERB_WARN)
 352         msg_Dbg( p_vout, "spawning the real video output" );
 353
 354     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 355
 356     /* Everything failed */
 357     if( p_vout->p_sys->p_vout == NULL )
 358     {
 359         msg_Err( p_vout, "can't open vout, aborting" );
 360         return VLC_EGENERIC;
 361     }
 362
 363     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 364
 365     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 366
 367     ADD_PARENT_CALLBACKS( SendEventsToChild );
 368
 369     return VLC_SUCCESS;
 370 }
 371
 372 /*****************************************************************************
 373  * End: terminate opencv_wrapper video thread output method
 374  *****************************************************************************/
 375 static void End( vout_thread_t *p_vout )
 376 {
 377     int i_index;
 378
 379     /* Free the fake output buffers we allocated */
 380     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 381     {
 382         i_index--;
 383         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 384     }
 385
 386     if ( p_vout->p_sys->p_opencv )
 387     {
 388         //release the internal opencv filter
 389         if( p_vout->p_sys->p_opencv->p_module )
 390             module_Unneed( p_vout->p_sys->p_opencv, p_vout->p_sys->p_opencv->p_module );
 391         vlc_object_detach( p_vout->p_sys->p_opencv );
 392         vlc_object_release( p_vout->p_sys->p_opencv );
 393         p_vout->p_sys->p_opencv = NULL;
 394     }
 395
 396 }
 397
 398 /*****************************************************************************
 399  * Destroy: destroy opencv_wrapper video thread output method
 400  *****************************************************************************
 401  * Terminate an output method created by opencv_wrapperCreateOutputMethod
 402  *****************************************************************************/
 403 static void Destroy( vlc_object_t *p_this )
 404 {
 405     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 406
 407     if( p_vout->p_sys->p_vout )
 408     {
 409         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 410         vlc_object_detach( p_vout->p_sys->p_vout );
 411         vout_Destroy( p_vout->p_sys->p_vout );
 412     }
 413
 414     DEL_PARENT_CALLBACKS( SendEventsToChild );
 415
 416     ReleaseImages(p_vout);
 417
 418     if( p_vout->p_sys->p_image )
 419         image_HandlerDelete( p_vout->p_sys->p_image );
 420
 421     free( p_vout->p_sys );
 422 }
 423
 424 /*****************************************************************************
 425  * ReleaseImages: Release OpenCV images in vout_sys_t.
 426  *****************************************************************************/
 427 static void ReleaseImages(vout_thread_t *p_vout)
 428 {
 429     int i = 0;
 430     if (p_vout->p_sys->p_cv_image)
 431     {
 432         for (i = 0; i < VOUT_MAX_PLANES; i++)
 433         {
 434             if (p_vout->p_sys->p_cv_image[i])
 435                 cvReleaseImageHeader(&(p_vout->p_sys->p_cv_image[i]));
 436             p_vout->p_sys->p_cv_image[i] = NULL;
 437         }
 438     }
 439     p_vout->p_sys->i_cv_image_size = 0;
 440
 441     /* Release temp picture_t if it exists */
 442     if (p_vout->p_sys->p_to_be_freed)
 443     {
 444         p_vout->p_sys->p_to_be_freed->pf_release( p_vout->p_sys->p_to_be_freed );
 445         p_vout->p_sys->p_to_be_freed = NULL;
 446     }
 447     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 448         msg_Dbg( p_vout, "images released" );
 449 }
 450
 451 /*****************************************************************************
 452  * VlcPictureToIplImage: Convert picture_t to IplImage
 453  *****************************************************************************
 454  * Converts given picture_t into IplImage(s) according to module config.
 455  * IplImage(s) are stored in vout_sys_t.
 456  *****************************************************************************/
 457 static void VlcPictureToIplImage( vout_thread_t *p_vout, picture_t *p_in )
 458 {
 459     int planes = p_in->i_planes;    //num input video planes
 460     // input video size
 461     CvSize sz = cvSize(abs(p_in->format.i_width), abs(p_in->format.i_height));
 462     video_format_t fmt_out;
 463     clock_t start, finish;  //performance measures
 464     double  duration;
 465     int i = 0;
 466     vout_sys_t* p_sys = p_vout->p_sys;
 467
 468     memset( &fmt_out, 0, sizeof(video_format_t) );
 469
 470     start = clock();
 471
 472     //do scale / color conversion according to p_sys config
 473     if ((p_sys->f_scale != 1) || (p_sys->i_internal_chroma != CINPUT))
 474     {
 475         fmt_out = p_in->format;
 476
 477         //calc the scaled video size
 478         fmt_out.i_width = p_in->format.i_width * p_sys->f_scale;
 479         fmt_out.i_height = p_in->format.i_height * p_sys->f_scale;
 480
 481         if (p_sys->i_internal_chroma == RGB)
 482         {
 483             //rgb2 gives 3 separate planes, this gives 1 interleaved plane
 484             //rv24 gives is about 20% faster but gives r&b the wrong way round
 485             //and I cant think of an easy way to fix this
 486             fmt_out.i_chroma = VLC_FOURCC('R','V','3','2');
 487         }
 488         else if (p_sys->i_internal_chroma == GREY)
 489         {
 490             //take the I (gray) plane (video seems to commonly be in this fmt so usually the
 491             //conversion does nothing)
 492             fmt_out.i_chroma = VLC_FOURCC('I','4','2','0');
 493         }
 494
 495         //convert from the input image
 496         p_sys->p_proc_image = image_Convert( p_sys->p_image, p_in,
 497                                      &(p_in->format), &fmt_out );
 498
 499         if (!p_sys->p_proc_image)
 500         {
 501             msg_Err(p_vout, "can't convert (unsupported formats?), aborting...");
 502             return;
 503         }
 504
 505         p_sys->p_to_be_freed = p_sys->p_proc_image;    //remember this so we can free it later
 506
 507     }
 508     else    //((p_sys->f_scale != 1) || (p_sys->i_internal_chroma != CINPUT))
 509     {
 510         //use the input image without conversion
 511         p_sys->p_proc_image = p_in;
 512     }
 513
 514     //Convert to the IplImage array that is to be processed.
 515     //If there are multiple planes in p_sys->p_proc_image, then 1 IplImage
 516     //is created for each plane.
 517     planes = p_sys->p_proc_image->i_planes;
 518     p_sys->i_cv_image_size = planes;
 519     for ( i = 0; i < planes; i++ )
 520     {
 521         sz = cvSize(abs(p_sys->p_proc_image->p[i].i_visible_pitch /
 522             p_sys->p_proc_image->p[i].i_pixel_pitch),
 523             abs(p_sys->p_proc_image->p[i].i_visible_lines));
 524
 525         p_sys->p_cv_image[i] = cvCreateImageHeader(sz, IPL_DEPTH_8U,
 526             p_sys->p_proc_image->p[i].i_pixel_pitch);
 527
 528         cvSetData( p_sys->p_cv_image[i],
 529             (char*)(p_sys->p_proc_image->p[i].p_pixels), p_sys->p_proc_image->p[i].i_pitch );
 530     }
 531
 532     //Hack the above opencv image array into a picture_t so that it can be sent to
 533     //another video filter
 534     p_sys->hacked_pic.p_data_orig = p_sys->p_cv_image;
 535     p_sys->hacked_pic.i_planes = planes;
 536     p_sys->hacked_pic.format.i_chroma = fmt_out.i_chroma;
 537
 538     //calculate duration of conversion
 539     finish = clock();
 540     duration = (double)(finish - start) / CLOCKS_PER_SEC;
 541     if (p_sys->i_verbosity > VERB_WARN)
 542         msg_Dbg( p_vout, "VlcPictureToIplImageRgb took %2.4f seconds\n", duration );
 543 }
 544
 545 /*****************************************************************************
 546  * Render: displays previously rendered output
 547  *****************************************************************************
 548  * This function send the currently rendered image to the internal opencv
 549  * filter for processing.
 550  *****************************************************************************/
 551 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 552 {
 553     picture_t *p_outpic = NULL;
 554     clock_t start, finish;
 555     double  duration;
 556
 557     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 558               == NULL )
 559     {
 560         if( p_vout->b_die || p_vout->b_error )
 561         {   return; }
 562         msleep( VOUT_OUTMEM_SLEEP );
 563     }
 564
 565     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 566
 567     start = clock();
 568
 569     if (p_vout->p_sys->i_wrapper_output == VINPUT)  //output = input video
 570     {
 571         //This copy is a bit unfortunate but image_Convert can't write into an existing image so it is better to copy the
 572         //(say) 16bit YUV image here than a 32bit RGB image somehwere else.
 573         //It is also not that expensive in time.
 574         vout_CopyPicture( p_vout, p_outpic, p_pic );
 575         VlcPictureToIplImage( p_vout, p_pic);
 576         //pass the image to the internal opencv filter for processing
 577         if ((p_vout->p_sys->p_opencv) && (p_vout->p_sys->p_opencv->p_module))
 578             p_vout->p_sys->p_opencv->pf_video_filter( p_vout->p_sys->p_opencv, &(p_vout->p_sys->hacked_pic));
 579     }
 580     else    //output = processed video (NONE option not working yet)
 581     {
 582         VlcPictureToIplImage( p_vout, p_pic);
 583         //pass the image to the internal opencv filter for processing
 584         if ((p_vout->p_sys->p_opencv) && (p_vout->p_sys->p_opencv->p_module))
 585             p_vout->p_sys->p_opencv->pf_video_filter( p_vout->p_sys->p_opencv, &(p_vout->p_sys->hacked_pic));
 586         //copy the processed image into the output image
 587         if ((p_vout->p_sys->p_proc_image) && (p_vout->p_sys->p_proc_image->p_data))
 588             vout_CopyPicture( p_vout, p_outpic, p_vout->p_sys->p_proc_image );
 589     }
 590
 591     //calculate duration
 592     finish = clock();
 593     duration = (double)(finish - start) / CLOCKS_PER_SEC;
 594     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 595         msg_Dbg( p_vout, "Render took %2.4f seconds\n", duration );
 596
 597     ReleaseImages(p_vout);
 598     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 599
 600     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 601     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 602 }
 603
 604 /*****************************************************************************
 605  * SendEvents: forward mouse and keyboard events to the parent p_vout
 606  *****************************************************************************/
 607 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 608                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 609 {
 610     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 611
 612     return VLC_SUCCESS;
 613 }
 614
 615 /*****************************************************************************
 616  * SendEventsToChild: forward events to the child/children vout
 617  *****************************************************************************/
 618 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 619                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 620 {
 621     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 622     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 623     return VLC_SUCCESS;
 624 }