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