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_common.h>
  36 #include <vlc_plugin.h>
  37 #include <vlc_vout.h>
  38
  39 #include <math.h>
  40 #include <time.h>
  41
  42 #include "vlc_filter.h"
  43 #include "filter_common.h"
  44 #include <vlc_charset.h>
  45 #include "vlc_image.h"
  46 #include "vlc_input.h"
  47 #include "vlc_playlist.h"
  48
  49
  50 /*****************************************************************************
  51  * Local prototypes
  52  *****************************************************************************/
  53 static int  Create    ( vlc_object_t * );
  54 static void Destroy   ( vlc_object_t * );
  55
  56 static int  Init      ( vout_thread_t * );
  57 static void End       ( vout_thread_t * );
  58 static void Render    ( vout_thread_t *, picture_t * );
  59
  60 static int  SendEvents( vlc_object_t *, char const *,
  61                         vlc_value_t, vlc_value_t, void * );
  62 static void ReleaseImages( vout_thread_t *p_vout );
  63 static void VlcPictureToIplImage( vout_thread_t *p_vout, picture_t *p_in );
  64
  65 /*****************************************************************************
  66  * Module descriptor
  67  *****************************************************************************/
  68
  69 static const char *const chroma_list[] = { "input", "I420", "RGB32"};
  70 static const char *const chroma_list_text[] = { N_("Use input chroma unaltered"),
  71   N_("I420 - first plane is greyscale"), N_("RGB32")};
  72
  73 static const char *const output_list[] = { "none", "input", "processed"};
  74 static const char *const output_list_text[] = { N_("Don't display any video"),
  75   N_("Display the input video"), N_("Display the processed video")};
  76
  77 static const char *const verbosity_list[] = { "error", "warning", "debug"};
  78 static const char *const verbosity_list_text[] = { N_("Show only errors"),
  79   N_("Show errors and warnings"), N_("Show everything including debug messages")};
  80
  81 vlc_module_begin();
  82     set_description( N_("OpenCV video filter wrapper") );
  83     set_shortname( N_("OpenCV" ));
  84     set_category( CAT_VIDEO );
  85     set_subcategory( SUBCAT_VIDEO_VFILTER );
  86     set_capability( "video filter", 0 );
  87     add_shortcut( "opencv_wrapper" );
  88     set_callbacks( Create, Destroy );
  89     add_float_with_range( "opencv-scale", 1.0, 0.1, 2.0, NULL,
  90                           N_("Scale factor (0.1-2.0)"),
  91                           N_("Ammount by which to scale the picture before sending it to the internal OpenCV filter"),
  92                           false );
  93     add_string( "opencv-chroma", "input", NULL,
  94                           N_("OpenCV filter chroma"),
  95                           N_("Chroma to convert picture to before sending it to the internal OpenCV filter"), false);
  96         change_string_list( chroma_list, chroma_list_text, 0);
  97     add_string( "opencv-output", "input", NULL,
  98                           N_("Wrapper filter output"),
  99                           N_("Determines what (if any) video is displayed by the wrapper filter"), false);
 100         change_string_list( output_list, output_list_text, 0);
 101     add_string( "opencv-verbosity", "error", NULL,
 102                           N_("Wrapper filter verbosity"),
 103                           N_("Determines wrapper filter verbosity level"), false);
 104         change_string_list( verbosity_list, verbosity_list_text, 0);
 105     add_string( "opencv-filter-name", "none", NULL,
 106                           N_("OpenCV internal filter name"),
 107                           N_("Name of internal OpenCV plugin filter to use"), false);
 108 vlc_module_end();
 109
 110
 111 /*****************************************************************************
 112  * wrapper_output_t: what video is output
 113  *****************************************************************************/
 114 enum wrapper_output_t
 115 {
 116    NONE,    //not working yet
 117    VINPUT,
 118    PROCESSED
 119 };
 120
 121 /*****************************************************************************
 122  * internal_chroma_t: what chroma is sent to the internal opencv filter
 123  *****************************************************************************/
 124 enum internal_chroma_t
 125 {
 126    CINPUT,
 127    GREY,
 128    RGB
 129 };
 130
 131 /*****************************************************************************
 132  * verbosity_t:
 133  *****************************************************************************/
 134 enum verbosity_t
 135 {
 136    VERB_ERROR,
 137    VERB_WARN,
 138    VERB_DEBUG
 139 };
 140
 141 /*****************************************************************************
 142  * vout_sys_t: opencv_wrapper video output method descriptor
 143  *****************************************************************************
 144  * This structure is part of the video output thread descriptor.
 145  * It describes the opencv_wrapper specific properties of an output thread.
 146  *****************************************************************************/
 147 struct vout_sys_t
 148 {
 149     vout_thread_t *p_vout;
 150
 151     image_handler_t *p_image;
 152
 153     int i_cv_image_size;
 154
 155     picture_t *p_proc_image;
 156     picture_t *p_to_be_freed;
 157
 158     float f_scale;
 159
 160     int i_wrapper_output;
 161     int i_internal_chroma;
 162     int i_verbosity;
 163
 164     IplImage *p_cv_image[VOUT_MAX_PLANES];
 165
 166     filter_t *p_opencv;
 167     char* psz_inner_name;
 168
 169     picture_t hacked_pic;
 170 };
 171
 172 /*****************************************************************************
 173  * Control: control facility for the vout (forwards to child vout)
 174  *****************************************************************************/
 175 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 176 {
 177     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 178 }
 179
 180 /*****************************************************************************
 181  * Create: allocates opencv_wrapper video thread output method
 182  *****************************************************************************
 183  * This function allocates and initializes a opencv_wrapper vout method.
 184  *****************************************************************************/
 185 static int Create( vlc_object_t *p_this )
 186 {
 187     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 188     char *psz_chroma, *psz_output, *psz_verbosity;
 189     int i = 0;
 190
 191     /* Allocate structure */
 192     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 193     if( p_vout->p_sys == NULL )
 194     {
 195         msg_Err( p_vout, "out of memory" );
 196         return VLC_ENOMEM;
 197     }
 198
 199     /* Init structure */
 200     p_vout->p_sys->p_image = image_HandlerCreate( p_vout );
 201     for (i = 0; i < VOUT_MAX_PLANES; i++)
 202         p_vout->p_sys->p_cv_image[i] = NULL;
 203     p_vout->p_sys->p_proc_image = NULL;
 204     p_vout->p_sys->p_to_be_freed = NULL;
 205     p_vout->p_sys->i_cv_image_size = 0;
 206
 207     p_vout->pf_init = Init;
 208     p_vout->pf_end = End;
 209     p_vout->pf_manage = NULL;
 210     p_vout->pf_render = Render;
 211     p_vout->pf_display = NULL;
 212     p_vout->pf_control = Control;
 213
 214     /* Retrieve and apply config */
 215     if( !(psz_chroma = config_GetPsz( p_vout, "opencv-chroma" )) )
 216     {
 217         msg_Err( p_vout, "configuration variable %s empty, using 'grey'",
 218                          "opencv-chroma" );
 219         p_vout->p_sys->i_internal_chroma = GREY;
 220     }
 221     else
 222     {
 223         if( !strcmp( psz_chroma, "input" ) )
 224             p_vout->p_sys->i_internal_chroma = CINPUT;
 225         else if( !strcmp( psz_chroma, "I420" ) )
 226             p_vout->p_sys->i_internal_chroma = GREY;
 227         else if( !strcmp( psz_chroma, "RGB32" ) )
 228             p_vout->p_sys->i_internal_chroma = RGB;
 229         else
 230         {
 231             msg_Err( p_vout, "no valid opencv-chroma provided, using 'grey'" );
 232             p_vout->p_sys->i_internal_chroma = GREY;
 233         }
 234     }
 235     free( psz_chroma);
 236
 237     if( !(psz_output = config_GetPsz( p_vout, "opencv-output" )) )
 238     {
 239         msg_Err( p_vout, "configuration variable %s empty, using 'input'",
 240                          "opencv-output" );
 241         p_vout->p_sys->i_wrapper_output = VINPUT;
 242     }
 243     else
 244     {
 245         if( !strcmp( psz_output, "none" ) )
 246             p_vout->p_sys->i_wrapper_output = NONE;
 247         else if( !strcmp( psz_output, "input" ) )
 248             p_vout->p_sys->i_wrapper_output = VINPUT;
 249         else if( !strcmp( psz_output, "processed" ) )
 250             p_vout->p_sys->i_wrapper_output = PROCESSED;
 251         else
 252         {
 253             msg_Err( p_vout, "no valid opencv-output provided, using 'input'" );
 254             p_vout->p_sys->i_wrapper_output = VINPUT;
 255         }
 256     }
 257     free( psz_output);
 258
 259     if( !(psz_verbosity = config_GetPsz( p_vout, "opencv-verbosity" )) )
 260     {
 261         msg_Err( p_vout, "configuration variable %s empty, using 'input'",
 262                          "opencv-verbosity" );
 263         p_vout->p_sys->i_verbosity = VERB_ERROR;
 264     }
 265     else
 266     {
 267         if( !strcmp( psz_verbosity, "error" ) )
 268             p_vout->p_sys->i_verbosity = VERB_ERROR;
 269         else if( !strcmp( psz_verbosity, "warning" ) )
 270             p_vout->p_sys->i_verbosity = VERB_WARN;
 271         else if( !strcmp( psz_verbosity, "debug" ) )
 272             p_vout->p_sys->i_verbosity = VERB_DEBUG;
 273         else
 274         {
 275             msg_Err( p_vout, "no valid opencv-verbosity provided, using 'error'" );
 276             p_vout->p_sys->i_verbosity = VERB_ERROR;
 277         }
 278     }
 279     free( psz_verbosity);
 280
 281     p_vout->p_sys->psz_inner_name = config_GetPsz( p_vout, "opencv-filter-name" );
 282
 283     p_vout->p_sys->f_scale =
 284         config_GetFloat( p_vout, "opencv-scale" );
 285
 286     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 287         msg_Info(p_vout, "Configuration: opencv-scale: %f, opencv-chroma: %d, "
 288             "opencv-output: %d, opencv-verbosity %d, opencv-filter %s",
 289             p_vout->p_sys->f_scale,
 290             p_vout->p_sys->i_internal_chroma,
 291             p_vout->p_sys->i_wrapper_output,
 292             p_vout->p_sys->i_verbosity,
 293             p_vout->p_sys->psz_inner_name);
 294
 295     return VLC_SUCCESS;
 296 }
 297
 298 /*****************************************************************************
 299  * Init: initialize opencv_wrapper video thread output method
 300  *****************************************************************************/
 301 static int Init( vout_thread_t *p_vout )
 302 {
 303     int i_index;
 304     picture_t *p_pic;
 305     video_format_t fmt;
 306     vout_sys_t *p_sys = p_vout->p_sys;
 307     I_OUTPUTPICTURES = 0;
 308
 309     /* Initialize the output video format */
 310     memset( &fmt, 0, sizeof(video_format_t) );
 311     p_vout->output.i_chroma = p_vout->render.i_chroma;
 312     p_vout->output.i_width  = p_vout->render.i_width;
 313     p_vout->output.i_height = p_vout->render.i_height;
 314     p_vout->output.i_aspect = p_vout->render.i_aspect;
 315     p_vout->fmt_out = p_vout->fmt_in;           //set to input video format
 316
 317     fmt = p_vout->fmt_out;
 318     if (p_sys->i_wrapper_output == PROCESSED)   //set to processed video format
 319     {
 320         fmt.i_width = fmt.i_width * p_sys->f_scale;
 321         fmt.i_height = fmt.i_height * p_sys->f_scale;
 322         fmt.i_visible_width = fmt.i_visible_width * p_sys->f_scale;
 323         fmt.i_visible_height = fmt.i_visible_height * p_sys->f_scale;
 324         fmt.i_x_offset = fmt.i_x_offset * p_sys->f_scale;
 325         fmt.i_y_offset = fmt.i_y_offset * p_sys->f_scale;
 326
 327         if (p_sys->i_internal_chroma == GREY)
 328             fmt.i_chroma = VLC_FOURCC('I','4','2','0');
 329         else if (p_sys->i_internal_chroma == RGB)
 330             fmt.i_chroma = VLC_FOURCC('R','V','3','2');
 331     }
 332
 333     /* Load the internal opencv filter */
 334     /* We don't need to set up video formats for this filter as it not actually using a picture_t */
 335     p_sys->p_opencv = vlc_object_create( p_vout, sizeof(filter_t) );
 336     vlc_object_attach( p_sys->p_opencv, p_vout );
 337
 338     if (p_vout->p_sys->psz_inner_name)
 339         p_sys->p_opencv->p_module =
 340             module_Need( p_sys->p_opencv, p_sys->psz_inner_name, 0, 0 );
 341
 342     if( !p_sys->p_opencv->p_module )
 343     {
 344         msg_Err( p_vout, "can't open internal opencv filter: %s", p_vout->p_sys->psz_inner_name );
 345         p_vout->p_sys->psz_inner_name = NULL;
 346         vlc_object_detach( p_sys->p_opencv );
 347         vlc_object_release( p_sys->p_opencv );
 348         p_sys->p_opencv = NULL;
 349     }
 350
 351     /* Try to open the real video output */
 352     if (p_sys->i_verbosity > VERB_WARN)
 353         msg_Dbg( p_vout, "spawning the real video output" );
 354
 355     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 356
 357     /* Everything failed */
 358     if( p_vout->p_sys->p_vout == NULL )
 359     {
 360         msg_Err( p_vout, "can't open vout, aborting" );
 361         return VLC_EGENERIC;
 362     }
 363
 364     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 365
 366     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 367
 368     ADD_PARENT_CALLBACKS( SendEventsToChild );
 369
 370     return VLC_SUCCESS;
 371 }
 372
 373 /*****************************************************************************
 374  * End: terminate opencv_wrapper video thread output method
 375  *****************************************************************************/
 376 static void End( vout_thread_t *p_vout )
 377 {
 378     int i_index;
 379
 380     /* Free the fake output buffers we allocated */
 381     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 382     {
 383         i_index--;
 384         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 385     }
 386
 387     if ( p_vout->p_sys->p_opencv )
 388     {
 389         //release the internal opencv filter
 390         if( p_vout->p_sys->p_opencv->p_module )
 391             module_Unneed( p_vout->p_sys->p_opencv, p_vout->p_sys->p_opencv->p_module );
 392         vlc_object_detach( p_vout->p_sys->p_opencv );
 393         vlc_object_release( p_vout->p_sys->p_opencv );
 394         p_vout->p_sys->p_opencv = NULL;
 395     }
 396
 397 }
 398
 399 /*****************************************************************************
 400  * Destroy: destroy opencv_wrapper video thread output method
 401  *****************************************************************************
 402  * Terminate an output method created by opencv_wrapperCreateOutputMethod
 403  *****************************************************************************/
 404 static void Destroy( vlc_object_t *p_this )
 405 {
 406     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 407
 408     if( p_vout->p_sys->p_vout )
 409     {
 410         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 411         vlc_object_detach( p_vout->p_sys->p_vout );
 412         vlc_object_release( p_vout->p_sys->p_vout );
 413     }
 414
 415     DEL_PARENT_CALLBACKS( SendEventsToChild );
 416
 417     ReleaseImages(p_vout);
 418
 419     if( p_vout->p_sys->p_image )
 420         image_HandlerDelete( p_vout->p_sys->p_image );
 421
 422     free( p_vout->p_sys );
 423 }
 424
 425 /*****************************************************************************
 426  * ReleaseImages: Release OpenCV images in vout_sys_t.
 427  *****************************************************************************/
 428 static void ReleaseImages(vout_thread_t *p_vout)
 429 {
 430     int i = 0;
 431     if (p_vout->p_sys->p_cv_image)
 432     {
 433         for (i = 0; i < VOUT_MAX_PLANES; i++)
 434         {
 435             if (p_vout->p_sys->p_cv_image[i])
 436                 cvReleaseImageHeader(&(p_vout->p_sys->p_cv_image[i]));
 437             p_vout->p_sys->p_cv_image[i] = NULL;
 438         }
 439     }
 440     p_vout->p_sys->i_cv_image_size = 0;
 441
 442     /* Release temp picture_t if it exists */
 443     if (p_vout->p_sys->p_to_be_freed)
 444     {
 445         p_vout->p_sys->p_to_be_freed->pf_release( p_vout->p_sys->p_to_be_freed );
 446         p_vout->p_sys->p_to_be_freed = NULL;
 447     }
 448     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 449         msg_Dbg( p_vout, "images released" );
 450 }
 451
 452 /*****************************************************************************
 453  * VlcPictureToIplImage: Convert picture_t to IplImage
 454  *****************************************************************************
 455  * Converts given picture_t into IplImage(s) according to module config.
 456  * IplImage(s) are stored in vout_sys_t.
 457  *****************************************************************************/
 458 static void VlcPictureToIplImage( vout_thread_t *p_vout, picture_t *p_in )
 459 {
 460     int planes = p_in->i_planes;    //num input video planes
 461     // input video size
 462     CvSize sz = cvSize(abs(p_in->format.i_width), abs(p_in->format.i_height));
 463     video_format_t fmt_out;
 464     clock_t start, finish;  //performance measures
 465     double  duration;
 466     int i = 0;
 467     vout_sys_t* p_sys = p_vout->p_sys;
 468
 469     memset( &fmt_out, 0, sizeof(video_format_t) );
 470
 471     start = clock();
 472
 473     //do scale / color conversion according to p_sys config
 474     if ((p_sys->f_scale != 1) || (p_sys->i_internal_chroma != CINPUT))
 475     {
 476         fmt_out = p_in->format;
 477
 478         //calc the scaled video size
 479         fmt_out.i_width = p_in->format.i_width * p_sys->f_scale;
 480         fmt_out.i_height = p_in->format.i_height * p_sys->f_scale;
 481
 482         if (p_sys->i_internal_chroma == RGB)
 483         {
 484             //rgb2 gives 3 separate planes, this gives 1 interleaved plane
 485             //rv24 gives is about 20% faster but gives r&b the wrong way round
 486             //and I cant think of an easy way to fix this
 487             fmt_out.i_chroma = VLC_FOURCC('R','V','3','2');
 488         }
 489         else if (p_sys->i_internal_chroma == GREY)
 490         {
 491             //take the I (gray) plane (video seems to commonly be in this fmt so usually the
 492             //conversion does nothing)
 493             fmt_out.i_chroma = VLC_FOURCC('I','4','2','0');
 494         }
 495
 496         //convert from the input image
 497         p_sys->p_proc_image = image_Convert( p_sys->p_image, p_in,
 498                                      &(p_in->format), &fmt_out );
 499
 500         if (!p_sys->p_proc_image)
 501         {
 502             msg_Err(p_vout, "can't convert (unsupported formats?), aborting...");
 503             return;
 504         }
 505
 506         p_sys->p_to_be_freed = p_sys->p_proc_image;    //remember this so we can free it later
 507
 508     }
 509     else    //((p_sys->f_scale != 1) || (p_sys->i_internal_chroma != CINPUT))
 510     {
 511         //use the input image without conversion
 512         p_sys->p_proc_image = p_in;
 513     }
 514
 515     //Convert to the IplImage array that is to be processed.
 516     //If there are multiple planes in p_sys->p_proc_image, then 1 IplImage
 517     //is created for each plane.
 518     planes = p_sys->p_proc_image->i_planes;
 519     p_sys->i_cv_image_size = planes;
 520     for ( i = 0; i < planes; i++ )
 521     {
 522         sz = cvSize(abs(p_sys->p_proc_image->p[i].i_visible_pitch /
 523             p_sys->p_proc_image->p[i].i_pixel_pitch),
 524             abs(p_sys->p_proc_image->p[i].i_visible_lines));
 525
 526         p_sys->p_cv_image[i] = cvCreateImageHeader(sz, IPL_DEPTH_8U,
 527             p_sys->p_proc_image->p[i].i_pixel_pitch);
 528
 529         cvSetData( p_sys->p_cv_image[i],
 530             (char*)(p_sys->p_proc_image->p[i].p_pixels), p_sys->p_proc_image->p[i].i_pitch );
 531     }
 532
 533     //Hack the above opencv image array into a picture_t so that it can be sent to
 534     //another video filter
 535     p_sys->hacked_pic.p_data_orig = p_sys->p_cv_image;
 536     p_sys->hacked_pic.i_planes = planes;
 537     p_sys->hacked_pic.format.i_chroma = fmt_out.i_chroma;
 538
 539     //calculate duration of conversion
 540     finish = clock();
 541     duration = (double)(finish - start) / CLOCKS_PER_SEC;
 542     if (p_sys->i_verbosity > VERB_WARN)
 543         msg_Dbg( p_vout, "VlcPictureToIplImageRgb took %2.4f seconds\n", duration );
 544 }
 545
 546 /*****************************************************************************
 547  * Render: displays previously rendered output
 548  *****************************************************************************
 549  * This function send the currently rendered image to the internal opencv
 550  * filter for processing.
 551  *****************************************************************************/
 552 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 553 {
 554     picture_t *p_outpic = NULL;
 555     clock_t start, finish;
 556     double  duration;
 557
 558     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 559               == NULL )
 560     {
 561         if( p_vout->b_die || p_vout->b_error )
 562         {   return; }
 563         msleep( VOUT_OUTMEM_SLEEP );
 564     }
 565
 566     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 567
 568     start = clock();
 569
 570     if (p_vout->p_sys->i_wrapper_output == VINPUT)  //output = input video
 571     {
 572         //This copy is a bit unfortunate but image_Convert can't write into an existing image so it is better to copy the
 573         //(say) 16bit YUV image here than a 32bit RGB image somehwere else.
 574         //It is also not that expensive in time.
 575         vout_CopyPicture( p_vout, p_outpic, p_pic );
 576         VlcPictureToIplImage( p_vout, p_pic);
 577         //pass the image to the internal opencv filter for processing
 578         if ((p_vout->p_sys->p_opencv) && (p_vout->p_sys->p_opencv->p_module))
 579             p_vout->p_sys->p_opencv->pf_video_filter( p_vout->p_sys->p_opencv, &(p_vout->p_sys->hacked_pic));
 580     }
 581     else    //output = processed video (NONE option not working yet)
 582     {
 583         VlcPictureToIplImage( p_vout, p_pic);
 584         //pass the image to the internal opencv filter for processing
 585         if ((p_vout->p_sys->p_opencv) && (p_vout->p_sys->p_opencv->p_module))
 586             p_vout->p_sys->p_opencv->pf_video_filter( p_vout->p_sys->p_opencv, &(p_vout->p_sys->hacked_pic));
 587         //copy the processed image into the output image
 588         if ((p_vout->p_sys->p_proc_image) && (p_vout->p_sys->p_proc_image->p_data))
 589             vout_CopyPicture( p_vout, p_outpic, p_vout->p_sys->p_proc_image );
 590     }
 591
 592     //calculate duration
 593     finish = clock();
 594     duration = (double)(finish - start) / CLOCKS_PER_SEC;
 595     if (p_vout->p_sys->i_verbosity > VERB_WARN)
 596         msg_Dbg( p_vout, "Render took %2.4f seconds\n", duration );
 597
 598     ReleaseImages(p_vout);
 599     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 600
 601     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 602     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 603 }
 604
 605 /*****************************************************************************
 606  * SendEvents: forward mouse and keyboard events to the parent p_vout
 607  *****************************************************************************/
 608 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 609                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 610 {
 611     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 612
 613     return VLC_SUCCESS;
 614 }
 615
 616 /*****************************************************************************
 617  * SendEventsToChild: forward events to the child/children vout
 618  *****************************************************************************/
 619 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 620                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 621 {
 622     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 623     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 624     return VLC_SUCCESS;
 625 }