git.sesse.net Git - mlt/blob - src/modules/sdl/consumer_sdl_still.c

   1 /*
   2  * consumer_sdl_still.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "consumer_sdl.h"
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <framework/mlt_factory.h>
  25 #include <framework/mlt_filter.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <pthread.h>
  30 #include <SDL/SDL.h>
  31 #include <SDL/SDL_syswm.h>
  32 #include <sys/time.h>
  33
  34 /** This classes definition.
  35 */
  36
  37 typedef struct consumer_sdl_s *consumer_sdl;
  38
  39 struct consumer_sdl_s
  40 {
  41         struct mlt_consumer_s parent;
  42         mlt_properties properties;
  43         pthread_t thread;
  44         int joined;
  45         int running;
  46         int window_width;
  47         int window_height;
  48         int width;
  49         int height;
  50         int playing;
  51         int sdl_flags;
  52         SDL_Surface *sdl_screen;
  53         SDL_Rect rect;
  54         uint8_t *buffer;
  55         int last_position;
  56         mlt_producer last_producer;
  57         int filtered;
  58 };
  59
  60 /** Forward references to static functions.
  61 */
  62
  63 static int consumer_start( mlt_consumer parent );
  64 static int consumer_stop( mlt_consumer parent );
  65 static int consumer_is_stopped( mlt_consumer parent );
  66 static void consumer_close( mlt_consumer parent );
  67 static void *consumer_thread( void * );
  68 static int consumer_get_dimensions( int *width, int *height );
  69 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  70
  71 /** This is what will be called by the factory - anything can be passed in
  72         via the argument, but keep it simple.
  73 */
  74
  75 mlt_consumer consumer_sdl_still_init( char *arg )
  76 {
  77         // Create the consumer object
  78         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  79
  80         // If no malloc'd and consumer init ok
  81         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  82         {
  83                 // Get the parent consumer object
  84                 mlt_consumer parent = &this->parent;
  85
  86                 // get a handle on properties
  87                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
  88                 this->properties = MLT_SERVICE_PROPERTIES( service );
  89
  90                 // Get the default display ratio
  91                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
  92
  93                 // We have stuff to clean up, so override the close method
  94                 parent->close = consumer_close;
  95
  96                 // Default scaler (for now we'll use nearest)
  97                 mlt_properties_set( this->properties, "rescale", "nearest" );
  98
  99                 // We're always going to run this in non-realtime mode
 100                 mlt_properties_set( this->properties, "real_time", "0" );
 101
 102                 // Default progressive true
 103                 mlt_properties_set_int( this->properties, "progressive", 1 );
 104
 105                 // Ensure we don't join on a non-running object
 106                 this->joined = 1;
 107
 108                 // process actual param
 109                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 110                 {
 111                         this->width = mlt_properties_get_int( this->properties, "width" );
 112                         this->height = mlt_properties_get_int( this->properties, "height" );
 113                 }
 114                 else
 115                 {
 116                         mlt_properties_set_int( this->properties, "width", this->width );
 117                         mlt_properties_set_int( this->properties, "height", this->height );
 118                 }
 119
 120                 // Default window size
 121                 this->window_width = ( double )this->height * display_ratio;
 122                 this->window_height = this->height;
 123
 124                 // Set the sdl flags
 125                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 126
 127                 // Allow thread to be started/stopped
 128                 parent->start = consumer_start;
 129                 parent->stop = consumer_stop;
 130                 parent->is_stopped = consumer_is_stopped;
 131
 132                 // Register specific events
 133                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 134
 135                 // Return the consumer produced
 136                 return parent;
 137         }
 138
 139         // malloc or consumer init failed
 140         free( this );
 141
 142         // Indicate failure
 143         return NULL;
 144 }
 145
 146 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 147 {
 148         if ( listener != NULL )
 149                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 150 }
 151
 152 static int consumer_start( mlt_consumer parent )
 153 {
 154         consumer_sdl this = parent->child;
 155
 156         if ( !this->running )
 157         {
 158                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 159                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 160
 161                 // Attach a colour space converter
 162                 if ( !this->filtered )
 163                 {
 164                         mlt_filter filter = mlt_factory_filter( "avcolour_space", NULL );
 165                         mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "forced", mlt_image_yuv422 );
 166                         mlt_service_attach( MLT_CONSUMER_SERVICE( parent ), filter );
 167                         mlt_filter_close( filter );
 168                         this->filtered = 1;
 169                 }
 170
 171                 consumer_stop( parent );
 172
 173                 this->last_position = -1;
 174                 this->running = 1;
 175                 this->joined = 0;
 176
 177                 // Allow the user to force resizing to window size
 178                 this->width = mlt_properties_get_int( this->properties, "width" );
 179                 this->height = mlt_properties_get_int( this->properties, "height" );
 180
 181                 if ( sdl_started == 0 && preview_off == 0 )
 182                 {
 183                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 184                         {
 185                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 186                                 return -1;
 187                         }
 188
 189                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 190                         SDL_EnableUNICODE( 1 );
 191                 }
 192                 else if ( preview_off == 0 )
 193                 {
 194                         if ( SDL_GetVideoSurface( ) != NULL )
 195                         {
 196                                 this->sdl_screen = SDL_GetVideoSurface( );
 197                                 consumer_get_dimensions( &this->window_width, &this->window_height );
 198                         }
 199                 }
 200
 201                 if ( this->sdl_screen == NULL && preview_off == 0 )
 202                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 203
 204                 pthread_create( &this->thread, NULL, consumer_thread, this );
 205         }
 206
 207         return 0;
 208 }
 209
 210 static int consumer_stop( mlt_consumer parent )
 211 {
 212         // Get the actual object
 213         consumer_sdl this = parent->child;
 214
 215         if ( this->joined == 0 )
 216         {
 217                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 218                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 219
 220                 // Kill the thread and clean up
 221                 this->running = 0;
 222
 223                 pthread_join( this->thread, NULL );
 224                 this->joined = 1;
 225
 226                 if ( sdl_started == 0 && preview_off == 0 )
 227                         SDL_Quit( );
 228
 229                 this->sdl_screen = NULL;
 230         }
 231
 232         return 0;
 233 }
 234
 235 static int consumer_is_stopped( mlt_consumer parent )
 236 {
 237         consumer_sdl this = parent->child;
 238         return !this->running;
 239 }
 240
 241 static int sdl_lock_display( )
 242 {
 243         SDL_Surface *screen = SDL_GetVideoSurface( );
 244         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 245 }
 246
 247 static void sdl_unlock_display( )
 248 {
 249         SDL_Surface *screen = SDL_GetVideoSurface( );
 250         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 251                 SDL_UnlockSurface( screen );
 252 }
 253
 254 static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 255 {
 256         // Generate the affine transform scaling values
 257         int scale_width = ( width << 16 ) / rect.w;
 258         int scale_height = ( height << 16 ) / rect.h;
 259         int stride = width * 3;
 260         int x, y, row_index;
 261         uint8_t *q, *row;
 262
 263         // Constants defined for clarity and optimisation
 264         int scanlength = screen->pitch;
 265         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 266         uint8_t *p;
 267
 268         // Iterate through the screen using a very basic scaling algorithm
 269         for ( y = 0; y < rect.h; y ++ )
 270         {
 271                 p = start;
 272                 row_index = ( 32768 + scale_height * y ) >> 16;
 273                 row = image + stride * row_index;
 274                 for ( x = 0; x < rect.w; x ++ )
 275                 {
 276                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 277                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 278                 }
 279                 start += scanlength;
 280         }
 281 }
 282
 283 static inline void display_2( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 284 {
 285         // Generate the affine transform scaling values
 286         int scale_width = ( width << 16 ) / rect.w;
 287         int scale_height = ( height << 16 ) / rect.h;
 288         int stride = width * 3;
 289         int x, y, row_index;
 290         uint8_t *q, *row;
 291
 292         // Constants defined for clarity and optimisation
 293         int scanlength = screen->pitch / 2;
 294         uint16_t *start = ( uint16_t * )screen->pixels + rect.y * scanlength + rect.x;
 295         uint16_t *p;
 296
 297         // Iterate through the screen using a very basic scaling algorithm
 298         for ( y = 0; y < rect.h; y ++ )
 299         {
 300                 p = start;
 301                 row_index = ( 32768 + scale_height * y ) >> 16;
 302                 row = image + stride * row_index;
 303                 for ( x = 0; x < rect.w; x ++ )
 304                 {
 305                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 306                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 307                 }
 308                 start += scanlength;
 309         }
 310 }
 311
 312 static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 313 {
 314         // Generate the affine transform scaling values
 315         int scale_width = ( width << 16 ) / rect.w;
 316         int scale_height = ( height << 16 ) / rect.h;
 317         int stride = width * 3;
 318         int x, y, row_index;
 319         uint8_t *q, *row;
 320
 321         // Constants defined for clarity and optimisation
 322         int scanlength = screen->pitch;
 323         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 324         uint8_t *p;
 325         uint32_t pixel;
 326
 327         // Iterate through the screen using a very basic scaling algorithm
 328         for ( y = 0; y < rect.h; y ++ )
 329         {
 330                 p = start;
 331                 row_index = ( 32768 + scale_height * y ) >> 16;
 332                 row = image + stride * row_index;
 333                 for ( x = 0; x < rect.w; x ++ )
 334                 {
 335                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 336                         pixel = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 337                         *p ++ = (pixel & 0xFF0000) >> 16;
 338                         *p ++ = (pixel & 0x00FF00) >> 8;
 339                         *p ++ = (pixel & 0x0000FF);
 340                 }
 341                 start += scanlength;
 342         }
 343 }
 344
 345 static inline void display_4( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 346 {
 347         // Generate the affine transform scaling values
 348         int scale_width = ( width << 16 ) / rect.w;
 349         int scale_height = ( height << 16 ) / rect.h;
 350         int stride = width * 3;
 351         int x, y, row_index;
 352         uint8_t *q, *row;
 353
 354         // Constants defined for clarity and optimisation
 355         int scanlength = screen->pitch / 4;
 356         uint32_t *start = ( uint32_t * )screen->pixels + rect.y * scanlength + rect.x;
 357         uint32_t *p;
 358
 359         // Iterate through the screen using a very basic scaling algorithm
 360         for ( y = 0; y < rect.h; y ++ )
 361         {
 362                 p = start;
 363                 row_index = ( 32768 + scale_height * y ) >> 16;
 364                 row = image + stride * row_index;
 365                 for ( x = 0; x < rect.w; x ++ )
 366                 {
 367                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 368                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 369                 }
 370                 start += scanlength;
 371         }
 372 }
 373
 374 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 375 {
 376         // Get the properties of this consumer
 377         mlt_properties properties = this->properties;
 378
 379         mlt_image_format vfmt = mlt_image_rgb24;
 380         int height = this->height;
 381         int width = this->width;
 382         uint8_t *image = NULL;
 383         int changed = 0;
 384         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 385
 386         void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 387         void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 388
 389         if ( lock != NULL ) lock( );
 390
 391         sdl_lock_display();
 392
 393         // Handle events
 394         if ( this->sdl_screen != NULL )
 395         {
 396                 SDL_Event event;
 397
 398                 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 399
 400                 while ( SDL_PollEvent( &event ) )
 401                 {
 402                         mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 403
 404                         switch( event.type )
 405                         {
 406                                 case SDL_VIDEORESIZE:
 407                                         this->window_width = event.resize.w;
 408                                         this->window_height = event.resize.h;
 409                                         changed = 1;
 410                                         break;
 411                                 case SDL_QUIT:
 412                                         this->running = 0;
 413                                         break;
 414                                 case SDL_KEYDOWN:
 415                                         {
 416                                                 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 417                                                 char keyboard[ 2 ] = " ";
 418                                                 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 419                                                 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 420                                                 {
 421                                                         keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 422                                                         callback( producer, keyboard );
 423                                                 }
 424                                         }
 425                                         break;
 426                         }
 427                 }
 428         }
 429
 430         if ( this->sdl_screen == NULL || changed )
 431         {
 432                 // open SDL window
 433                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 434                 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 435                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 436                 changed = 1;
 437         }
 438         else
 439         {
 440                 changed = 1;
 441         }
 442
 443         if ( changed == 0 &&
 444                  this->last_position == mlt_frame_get_position( frame ) &&
 445                  this->last_producer == mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL ) )
 446         {
 447                 sdl_unlock_display( );
 448                 if ( unlock != NULL ) unlock( );
 449                 return 0;
 450         }
 451
 452         // Update last frame shown info
 453         this->last_position = mlt_frame_get_position( frame );
 454         this->last_producer = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL );
 455
 456         // Get the image, width and height
 457         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 458         mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 459
 460         if ( image != NULL )
 461         {
 462                 char *rescale = mlt_properties_get( properties, "rescale" );
 463                 if ( rescale != NULL && strcmp( rescale, "none" ) )
 464                 {
 465                         double this_aspect = display_ratio / ( ( double )this->window_width / ( double )this->window_height );
 466                         this->rect.w = this_aspect * this->window_width;
 467                         this->rect.h = this->window_height;
 468                         if ( this->rect.w > this->window_width )
 469                         {
 470                                 this->rect.w = this->window_width;
 471                                 this->rect.h = ( 1.0 / this_aspect ) * this->window_height;
 472                         }
 473                 }
 474                 else
 475                 {
 476                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 477                         this->rect.w = frame_aspect * this->window_height;
 478                         this->rect.h = this->window_height;
 479                         if ( this->rect.w > this->window_width )
 480                         {
 481                                 this->rect.w = this->window_width;
 482                                 this->rect.h = ( 1.0 / frame_aspect ) * this->window_width;
 483                         }
 484                 }
 485
 486                 this->rect.x = ( this->window_width - this->rect.w ) / 2;
 487                 this->rect.y = ( this->window_height - this->rect.h ) / 2;
 488
 489                 mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 490                 mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 491                 mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 492                 mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 493         }
 494
 495         if ( !mlt_consumer_is_stopped( &this->parent ) && SDL_GetVideoSurface( ) != NULL && this->sdl_screen != NULL && this->sdl_screen->pixels != NULL )
 496         {
 497                 memset( this->sdl_screen->pixels, 0, this->window_width * this->window_height * this->sdl_screen->format->BytesPerPixel );
 498
 499                 switch( this->sdl_screen->format->BytesPerPixel )
 500                 {
 501                         case 1:
 502                                 display_1( this->sdl_screen, this->rect, image, width, height );
 503                                 break;
 504                         case 2:
 505                                 display_2( this->sdl_screen, this->rect, image, width, height );
 506                                 break;
 507                         case 3:
 508                                 display_3( this->sdl_screen, this->rect, image, width, height );
 509                                 break;
 510                         case 4:
 511                                 display_4( this->sdl_screen, this->rect, image, width, height );
 512                                 break;
 513                         default:
 514                                 fprintf( stderr, "Unsupported video depth %d\n", this->sdl_screen->format->BytesPerPixel );
 515                                 break;
 516                 }
 517
 518                 // Flip it into sight
 519                 SDL_Flip( this->sdl_screen );
 520         }
 521
 522         sdl_unlock_display();
 523
 524         if ( unlock != NULL ) unlock( );
 525
 526         return 1;
 527 }
 528
 529 /** Threaded wrapper for pipe.
 530 */
 531
 532 static void *consumer_thread( void *arg )
 533 {
 534         // Identify the arg
 535         consumer_sdl this = arg;
 536
 537         // Get the consumer
 538         mlt_consumer consumer = &this->parent;
 539         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 540
 541         // internal intialization
 542         mlt_frame frame = NULL;
 543         mlt_image_format vfmt = mlt_image_rgb24a;
 544         int height = this->height;
 545         int width = this->width;
 546         uint8_t *image = NULL;
 547
 548         // Allow the hosting app to provide the preview
 549         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 550         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 551
 552         // Check if a specific colour space has been requested
 553         if ( preview_off && preview_format != mlt_image_none )
 554                 vfmt = preview_format;
 555
 556         // Loop until told not to
 557         while( this->running )
 558         {
 559                 // Get a frame from the attached producer
 560                 frame = mlt_consumer_rt_frame( consumer );
 561
 562                 // Ensure that we have a frame
 563                 if ( this->running && frame != NULL )
 564                 {
 565                         if ( preview_off == 0 )
 566                         {
 567                                 consumer_play_video( this, frame );
 568                         }
 569                         else
 570                         {
 571                                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 572                                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 573                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 574                         }
 575                         mlt_frame_close( frame );
 576                 }
 577                 else
 578                 {
 579                         if ( frame ) mlt_frame_close( frame );
 580                         this->running = 0;
 581                 }
 582         }
 583
 584         return NULL;
 585 }
 586
 587 static int consumer_get_dimensions( int *width, int *height )
 588 {
 589         int changed = 0;
 590
 591         // SDL windows manager structure
 592         SDL_SysWMinfo wm;
 593
 594         // Specify the SDL Version
 595         SDL_VERSION( &wm.version );
 596
 597         // Get the wm structure
 598         if ( SDL_GetWMInfo( &wm ) == 1 )
 599         {
 600 #ifndef __DARWIN__
 601                 // Check that we have the X11 wm
 602                 if ( wm.subsystem == SDL_SYSWM_X11 )
 603                 {
 604                         // Get the SDL window
 605                         Window window = wm.info.x11.window;
 606
 607                         // Get the display session
 608                         Display *display = wm.info.x11.display;
 609
 610                         // Get the window attributes
 611                         XWindowAttributes attr;
 612                         XGetWindowAttributes( display, window, &attr );
 613
 614                         // Determine whether window has changed
 615                         changed = *width != attr.width || *height != attr.height;
 616
 617                         // Return width and height
 618                         *width = attr.width;
 619                         *height = attr.height;
 620                 }
 621 #endif
 622         }
 623
 624         return changed;
 625 }
 626
 627 /** Callback to allow override of the close method.
 628 */
 629
 630 static void consumer_close( mlt_consumer parent )
 631 {
 632         // Get the actual object
 633         consumer_sdl this = parent->child;
 634
 635         // Stop the consumer
 636         mlt_consumer_stop( parent );
 637
 638         // Now clean up the rest
 639         mlt_consumer_close( parent );
 640
 641         // Finally clean up this
 642         free( this );
 643 }