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