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 library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt_consumer.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 <framework/mlt_log.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <pthread.h>
  31 #include <SDL/SDL.h>
  32 #include <SDL/SDL_syswm.h>
  33 #include <sys/time.h>
  34
  35 extern pthread_mutex_t mlt_sdl_mutex;
  36
  37 /** This classes definition.
  38 */
  39
  40 typedef struct consumer_sdl_s *consumer_sdl;
  41
  42 struct consumer_sdl_s
  43 {
  44         struct mlt_consumer_s parent;
  45         mlt_properties properties;
  46         pthread_t thread;
  47         int joined;
  48         int running;
  49         int window_width;
  50         int window_height;
  51         int width;
  52         int height;
  53         int playing;
  54         int sdl_flags;
  55         SDL_Surface *sdl_screen;
  56         SDL_Rect rect;
  57         uint8_t *buffer;
  58         int last_position;
  59         mlt_producer last_producer;
  60 };
  61
  62 /** Forward references to static functions.
  63 */
  64
  65 static int consumer_start( mlt_consumer parent );
  66 static int consumer_stop( mlt_consumer parent );
  67 static int consumer_is_stopped( mlt_consumer parent );
  68 static void consumer_close( mlt_consumer parent );
  69 static void *consumer_thread( void * );
  70 static int consumer_get_dimensions( int *width, int *height );
  71 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  72
  73 /** This is what will be called by the factory - anything can be passed in
  74         via the argument, but keep it simple.
  75 */
  76
  77 mlt_consumer consumer_sdl_still_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  78 {
  79         // Create the consumer object
  80         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  81
  82         // If no malloc'd and consumer init ok
  83         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  84         {
  85                 // Get the parent consumer object
  86                 mlt_consumer parent = &this->parent;
  87
  88                 // get a handle on properties
  89                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
  90                 this->properties = MLT_SERVICE_PROPERTIES( service );
  91
  92                 // We have stuff to clean up, so override the close method
  93                 parent->close = consumer_close;
  94
  95                 // Default scaler (for now we'll use nearest)
  96                 mlt_properties_set( this->properties, "rescale", "nearest" );
  97
  98                 // We're always going to run this in non-realtime mode
  99                 mlt_properties_set( this->properties, "real_time", "0" );
 100
 101                 // Ensure we don't join on a non-running object
 102                 this->joined = 1;
 103
 104                 // process actual param
 105                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 106                 {
 107                         this->width = mlt_properties_get_int( this->properties, "width" );
 108                         this->height = mlt_properties_get_int( this->properties, "height" );
 109                 }
 110                 else
 111                 {
 112                         mlt_properties_set_int( this->properties, "width", this->width );
 113                         mlt_properties_set_int( this->properties, "height", this->height );
 114                 }
 115
 116                 // Set the sdl flags
 117                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 118
 119                 // Allow thread to be started/stopped
 120                 parent->start = consumer_start;
 121                 parent->stop = consumer_stop;
 122                 parent->is_stopped = consumer_is_stopped;
 123
 124                 // Register specific events
 125                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 126
 127                 // Return the consumer produced
 128                 return parent;
 129         }
 130
 131         // malloc or consumer init failed
 132         free( this );
 133
 134         // Indicate failure
 135         return NULL;
 136 }
 137
 138 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 139 {
 140         if ( listener != NULL )
 141                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 142 }
 143
 144 static int consumer_start( mlt_consumer parent )
 145 {
 146         consumer_sdl this = parent->child;
 147
 148         if ( !this->running )
 149         {
 150                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 151                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 152
 153                 consumer_stop( parent );
 154
 155                 this->last_position = -1;
 156                 this->running = 1;
 157                 this->joined = 0;
 158
 159                 // Allow the user to force resizing to window size
 160                 this->width = mlt_properties_get_int( this->properties, "width" );
 161                 this->height = mlt_properties_get_int( this->properties, "height" );
 162
 163                 // Default window size
 164                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 165                 this->window_width = ( double )this->height * display_ratio;
 166                 this->window_height = this->height;
 167
 168                 if ( sdl_started == 0 && preview_off == 0 )
 169                 {
 170                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 171                         {
 172                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 173                                 return -1;
 174                         }
 175
 176                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 177                         SDL_EnableUNICODE( 1 );
 178                 }
 179                 else if ( preview_off == 0 )
 180                 {
 181                         if ( SDL_GetVideoSurface( ) != NULL )
 182                         {
 183                                 this->sdl_screen = SDL_GetVideoSurface( );
 184                         }
 185                 }
 186
 187                 if ( this->sdl_screen == NULL && preview_off == 0 )
 188                 {
 189                         pthread_mutex_lock( &mlt_sdl_mutex );
 190                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 191                         pthread_mutex_unlock( &mlt_sdl_mutex );
 192                 }
 193
 194                 pthread_create( &this->thread, NULL, consumer_thread, this );
 195         }
 196
 197         return 0;
 198 }
 199
 200 static int consumer_stop( mlt_consumer parent )
 201 {
 202         // Get the actual object
 203         consumer_sdl this = parent->child;
 204
 205         if ( this->joined == 0 )
 206         {
 207                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 208                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 209
 210                 // Kill the thread and clean up
 211                 this->running = 0;
 212
 213                 pthread_join( this->thread, NULL );
 214                 this->joined = 1;
 215
 216                 if ( sdl_started == 0 && preview_off == 0 )
 217                 {
 218                         pthread_mutex_lock( &mlt_sdl_mutex );
 219                         SDL_Quit( );
 220                         pthread_mutex_unlock( &mlt_sdl_mutex );
 221                 }
 222
 223                 this->sdl_screen = NULL;
 224         }
 225
 226         return 0;
 227 }
 228
 229 static int consumer_is_stopped( mlt_consumer parent )
 230 {
 231         consumer_sdl this = parent->child;
 232         return !this->running;
 233 }
 234
 235 static int sdl_lock_display( )
 236 {
 237         pthread_mutex_lock( &mlt_sdl_mutex );
 238         SDL_Surface *screen = SDL_GetVideoSurface( );
 239         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 240         pthread_mutex_unlock( &mlt_sdl_mutex );
 241         return result;
 242 }
 243
 244 static void sdl_unlock_display( )
 245 {
 246         pthread_mutex_lock( &mlt_sdl_mutex );
 247         SDL_Surface *screen = SDL_GetVideoSurface( );
 248         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 249                 SDL_UnlockSurface( screen );
 250         pthread_mutex_unlock( &mlt_sdl_mutex );
 251 }
 252
 253 static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 254 {
 255         // Generate the affine transform scaling values
 256         if ( rect.w == 0 || rect.h == 0 ) return;
 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         if ( rect.w == 0 || rect.h == 0 ) return;
 287         int scale_width = ( width << 16 ) / rect.w;
 288         int scale_height = ( height << 16 ) / rect.h;
 289         int stride = width * 3;
 290         int x, y, row_index;
 291         uint8_t *q, *row;
 292
 293         // Constants defined for clarity and optimisation
 294         int scanlength = screen->pitch / 2;
 295         uint16_t *start = ( uint16_t * )screen->pixels + rect.y * scanlength + rect.x;
 296         uint16_t *p;
 297
 298         // Iterate through the screen using a very basic scaling algorithm
 299         for ( y = 0; y < rect.h; y ++ )
 300         {
 301                 p = start;
 302                 row_index = ( 32768 + scale_height * y ) >> 16;
 303                 row = image + stride * row_index;
 304                 for ( x = 0; x < rect.w; x ++ )
 305                 {
 306                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 307                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 308                 }
 309                 start += scanlength;
 310         }
 311 }
 312
 313 static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 314 {
 315         // Generate the affine transform scaling values
 316         if ( rect.w == 0 || rect.h == 0 ) return;
 317         int scale_width = ( width << 16 ) / rect.w;
 318         int scale_height = ( height << 16 ) / rect.h;
 319         int stride = width * 3;
 320         int x, y, row_index;
 321         uint8_t *q, *row;
 322
 323         // Constants defined for clarity and optimisation
 324         int scanlength = screen->pitch;
 325         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 326         uint8_t *p;
 327         uint32_t pixel;
 328
 329         // Iterate through the screen using a very basic scaling algorithm
 330         for ( y = 0; y < rect.h; y ++ )
 331         {
 332                 p = start;
 333                 row_index = ( 32768 + scale_height * y ) >> 16;
 334                 row = image + stride * row_index;
 335                 for ( x = 0; x < rect.w; x ++ )
 336                 {
 337                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 338                         pixel = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 339                         *p ++ = (pixel & 0xFF0000) >> 16;
 340                         *p ++ = (pixel & 0x00FF00) >> 8;
 341                         *p ++ = (pixel & 0x0000FF);
 342                 }
 343                 start += scanlength;
 344         }
 345 }
 346
 347 static inline void display_4( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 348 {
 349         // Generate the affine transform scaling values
 350         if ( rect.w == 0 || rect.h == 0 ) return;
 351         int scale_width = ( width << 16 ) / rect.w;
 352         int scale_height = ( height << 16 ) / rect.h;
 353         int stride = width * 3;
 354         int x, y, row_index;
 355         uint8_t *q, *row;
 356
 357         // Constants defined for clarity and optimisation
 358         int scanlength = screen->pitch / 4;
 359         uint32_t *start = ( uint32_t * )screen->pixels + rect.y * scanlength + rect.x;
 360         uint32_t *p;
 361
 362         // Iterate through the screen using a very basic scaling algorithm
 363         for ( y = 0; y < rect.h; y ++ )
 364         {
 365                 p = start;
 366                 row_index = ( 32768 + scale_height * y ) >> 16;
 367                 row = image + stride * row_index;
 368                 for ( x = 0; x < rect.w; x ++ )
 369                 {
 370                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 371                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 372                 }
 373                 start += scanlength;
 374         }
 375 }
 376
 377 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 378 {
 379         // Get the properties of this consumer
 380         mlt_properties properties = this->properties;
 381
 382         mlt_image_format vfmt = mlt_image_rgb24;
 383         int height = this->height;
 384         int width = this->width;
 385         uint8_t *image = NULL;
 386         int changed = 0;
 387         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 388
 389         void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 390         void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 391
 392         if ( lock != NULL ) lock( );
 393
 394         sdl_lock_display();
 395
 396         // Handle events
 397         if ( this->sdl_screen != NULL )
 398         {
 399                 SDL_Event event;
 400
 401                 pthread_mutex_lock( &mlt_sdl_mutex );
 402                 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 403                 pthread_mutex_unlock( &mlt_sdl_mutex );
 404
 405                 while ( SDL_PollEvent( &event ) )
 406                 {
 407                         mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 408
 409                         switch( event.type )
 410                         {
 411                                 case SDL_VIDEORESIZE:
 412                                         this->window_width = event.resize.w;
 413                                         this->window_height = event.resize.h;
 414                                         changed = 1;
 415                                         break;
 416                                 case SDL_QUIT:
 417                                         this->running = 0;
 418                                         break;
 419                                 case SDL_KEYDOWN:
 420                                         {
 421                                                 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 422                                                 char keyboard[ 2 ] = " ";
 423                                                 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 424                                                 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 425                                                 {
 426                                                         keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 427                                                         callback( producer, keyboard );
 428                                                 }
 429                                         }
 430                                         break;
 431                         }
 432                 }
 433         }
 434
 435         if ( this->sdl_screen == NULL || changed )
 436         {
 437                 // open SDL window
 438                 pthread_mutex_lock( &mlt_sdl_mutex );
 439                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 440                 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 441                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 442                 pthread_mutex_unlock( &mlt_sdl_mutex );
 443
 444                 uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 445                 SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 446                 changed = 1;
 447         }
 448
 449         if ( changed == 0 &&
 450                  this->last_position == mlt_frame_get_position( frame ) &&
 451                  this->last_producer == mlt_frame_get_original_producer( frame ) &&
 452                  !mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "refresh" ) )
 453         {
 454                 sdl_unlock_display( );
 455                 if ( unlock != NULL ) unlock( );
 456                 struct timespec tm = { 0, 100000 };
 457                 nanosleep( &tm, NULL );
 458                 return 0;
 459         }
 460
 461         // Update last frame shown info
 462         this->last_position = mlt_frame_get_position( frame );
 463         this->last_producer = mlt_frame_get_original_producer( frame );
 464
 465         // Get the image, width and height
 466         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 467         mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 468
 469         if ( image != NULL )
 470         {
 471                 char *rescale = mlt_properties_get( properties, "rescale" );
 472                 if ( rescale != NULL && strcmp( rescale, "none" ) )
 473                 {
 474                         double this_aspect = display_ratio / ( ( double )this->window_width / ( double )this->window_height );
 475                         this->rect.w = this_aspect * this->window_width;
 476                         this->rect.h = this->window_height;
 477                         if ( this->rect.w > this->window_width )
 478                         {
 479                                 this->rect.w = this->window_width;
 480                                 this->rect.h = ( 1.0 / this_aspect ) * this->window_height;
 481                         }
 482                 }
 483                 else
 484                 {
 485                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 486                         this->rect.w = frame_aspect * this->window_height;
 487                         this->rect.h = this->window_height;
 488                         if ( this->rect.w > this->window_width )
 489                         {
 490                                 this->rect.w = this->window_width;
 491                                 this->rect.h = ( 1.0 / frame_aspect ) * this->window_width;
 492                         }
 493                 }
 494
 495                 this->rect.x = ( this->window_width - this->rect.w ) / 2;
 496                 this->rect.y = ( this->window_height - this->rect.h ) / 2;
 497
 498                 mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 499                 mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 500                 mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 501                 mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 502         }
 503
 504         if ( !mlt_consumer_is_stopped( &this->parent ) && SDL_GetVideoSurface( ) != NULL && this->sdl_screen != NULL && this->sdl_screen->pixels != NULL )
 505         {
 506                 switch( this->sdl_screen->format->BytesPerPixel )
 507                 {
 508                         case 1:
 509                                 display_1( this->sdl_screen, this->rect, image, width, height );
 510                                 break;
 511                         case 2:
 512                                 display_2( this->sdl_screen, this->rect, image, width, height );
 513                                 break;
 514                         case 3:
 515                                 display_3( this->sdl_screen, this->rect, image, width, height );
 516                                 break;
 517                         case 4:
 518                                 display_4( this->sdl_screen, this->rect, image, width, height );
 519                                 break;
 520                         default:
 521                                 fprintf( stderr, "Unsupported video depth %d\n", this->sdl_screen->format->BytesPerPixel );
 522                                 break;
 523                 }
 524
 525                 // Flip it into sight
 526                 SDL_Flip( this->sdl_screen );
 527         }
 528
 529         sdl_unlock_display();
 530
 531         if ( unlock != NULL ) unlock( );
 532
 533         return 1;
 534 }
 535
 536 /** Threaded wrapper for pipe.
 537 */
 538
 539 static void *consumer_thread( void *arg )
 540 {
 541         // Identify the arg
 542         consumer_sdl this = arg;
 543
 544         // Get the consumer
 545         mlt_consumer consumer = &this->parent;
 546         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 547         mlt_frame frame = NULL;
 548
 549         // Allow the hosting app to provide the preview
 550         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 551
 552         // Loop until told not to
 553         while( this->running )
 554         {
 555                 // Get a frame from the attached producer
 556                 frame = mlt_consumer_rt_frame( consumer );
 557
 558                 // Ensure that we have a frame
 559                 if ( this->running && frame != NULL )
 560                 {
 561                         if ( preview_off == 0 )
 562                         {
 563                                 consumer_play_video( this, frame );
 564                         }
 565                         else
 566                         {
 567                                 mlt_image_format vfmt = mlt_image_rgb24a;
 568                                 int height = this->height;
 569                                 int width = this->width;
 570                                 uint8_t *image = NULL;
 571                                 mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 572
 573                                 // Check if a specific colour space has been requested
 574                                 if ( preview_off && preview_format != mlt_image_none )
 575                                         vfmt = preview_format;
 576
 577                                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 578                                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 579                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 580                         }
 581                         mlt_frame_close( frame );
 582                 }
 583                 else
 584                 {
 585                         if ( frame ) mlt_frame_close( frame );
 586                         this->running = 0;
 587                 }
 588         }
 589
 590         return NULL;
 591 }
 592
 593 static int consumer_get_dimensions( int *width, int *height )
 594 {
 595         int changed = 0;
 596
 597         // SDL windows manager structure
 598         SDL_SysWMinfo wm;
 599
 600         // Specify the SDL Version
 601         SDL_VERSION( &wm.version );
 602
 603         // Get the wm structure
 604         if ( SDL_GetWMInfo( &wm ) == 1 )
 605         {
 606 #ifndef __DARWIN__
 607                 // Check that we have the X11 wm
 608                 if ( wm.subsystem == SDL_SYSWM_X11 )
 609                 {
 610                         // Get the SDL window
 611                         Window window = wm.info.x11.window;
 612
 613                         // Get the display session
 614                         Display *display = wm.info.x11.display;
 615
 616                         // Get the window attributes
 617                         XWindowAttributes attr;
 618                         XGetWindowAttributes( display, window, &attr );
 619
 620                         // Determine whether window has changed
 621                         changed = *width != attr.width || *height != attr.height;
 622
 623                         // Return width and height
 624                         *width = attr.width;
 625                         *height = attr.height;
 626                 }
 627 #endif
 628         }
 629
 630         return changed;
 631 }
 632
 633 /** Callback to allow override of the close method.
 634 */
 635
 636 static void consumer_close( mlt_consumer parent )
 637 {
 638         // Get the actual object
 639         consumer_sdl this = parent->child;
 640
 641         // Stop the consumer
 642         mlt_consumer_stop( parent );
 643
 644         // Now clean up the rest
 645         mlt_consumer_close( parent );
 646
 647         // Finally clean up this
 648         free( this );
 649 }