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, 2010 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.h>
  32 #include <SDL_syswm.h>
  33 #include <sys/time.h>
  34 #include "consumer_sdl_osx.h"
  35
  36 extern pthread_mutex_t mlt_sdl_mutex;
  37
  38 /** This classes definition.
  39 */
  40
  41 typedef struct consumer_sdl_s *consumer_sdl;
  42
  43 struct consumer_sdl_s
  44 {
  45         struct mlt_consumer_s parent;
  46         mlt_properties properties;
  47         pthread_t thread;
  48         int joined;
  49         int running;
  50         int window_width;
  51         int window_height;
  52         int width;
  53         int height;
  54         int playing;
  55         int sdl_flags;
  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( 1, sizeof( struct consumer_sdl_s ) );
  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 + 0.5;
 166                 this->window_height = this->height;
 167
 168                 if ( sdl_started == 0 && preview_off == 0 )
 169                 {
 170                         pthread_mutex_lock( &mlt_sdl_mutex );
 171                         int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 172                         pthread_mutex_unlock( &mlt_sdl_mutex );
 173                         if ( ret < 0 )
 174                         {
 175                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 176                                 return -1;
 177                         }
 178
 179                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 180                         SDL_EnableUNICODE( 1 );
 181                 }
 182
 183                 pthread_mutex_lock( &mlt_sdl_mutex );
 184                 if ( !SDL_GetVideoSurface() && preview_off == 0 )
 185                         SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 186                 pthread_mutex_unlock( &mlt_sdl_mutex );
 187
 188                 pthread_create( &this->thread, NULL, consumer_thread, this );
 189         }
 190
 191         return 0;
 192 }
 193
 194 static int consumer_stop( mlt_consumer parent )
 195 {
 196         // Get the actual object
 197         consumer_sdl this = parent->child;
 198
 199         if ( this->joined == 0 )
 200         {
 201                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 202                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 203
 204                 // Kill the thread and clean up
 205                 this->running = 0;
 206
 207                 pthread_join( this->thread, NULL );
 208                 this->joined = 1;
 209
 210                 if ( sdl_started == 0 && preview_off == 0 )
 211                 {
 212                         pthread_mutex_lock( &mlt_sdl_mutex );
 213                         SDL_Quit( );
 214                         pthread_mutex_unlock( &mlt_sdl_mutex );
 215                 }
 216         }
 217
 218         return 0;
 219 }
 220
 221 static int consumer_is_stopped( mlt_consumer parent )
 222 {
 223         consumer_sdl this = parent->child;
 224         return !this->running;
 225 }
 226
 227 static int sdl_lock_display( )
 228 {
 229         pthread_mutex_lock( &mlt_sdl_mutex );
 230         SDL_Surface *screen = SDL_GetVideoSurface( );
 231         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 232         pthread_mutex_unlock( &mlt_sdl_mutex );
 233         return result;
 234 }
 235
 236 static void sdl_unlock_display( )
 237 {
 238         pthread_mutex_lock( &mlt_sdl_mutex );
 239         SDL_Surface *screen = SDL_GetVideoSurface( );
 240         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 241                 SDL_UnlockSurface( screen );
 242         pthread_mutex_unlock( &mlt_sdl_mutex );
 243 }
 244
 245 static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 246 {
 247         // Generate the affine transform scaling values
 248         if ( rect.w == 0 || rect.h == 0 ) return;
 249         int scale_width = ( width << 16 ) / rect.w;
 250         int scale_height = ( height << 16 ) / rect.h;
 251         int stride = width * 4;
 252         int x, y, row_index;
 253         uint8_t *q, *row;
 254
 255         // Constants defined for clarity and optimisation
 256         int scanlength = screen->pitch;
 257         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 258         uint8_t *p;
 259
 260         // Iterate through the screen using a very basic scaling algorithm
 261         for ( y = 0; y < rect.h; y ++ )
 262         {
 263                 p = start;
 264                 row_index = ( 32768 + scale_height * y ) >> 16;
 265                 row = image + stride * row_index;
 266                 for ( x = 0; x < rect.w; x ++ )
 267                 {
 268                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 4 );
 269                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 270                 }
 271                 start += scanlength;
 272         }
 273 }
 274
 275 static inline void display_2( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 276 {
 277         // Generate the affine transform scaling values
 278         if ( rect.w == 0 || rect.h == 0 ) return;
 279         int scale_width = ( width << 16 ) / rect.w;
 280         int scale_height = ( height << 16 ) / rect.h;
 281         int stride = width * 4;
 282         int x, y, row_index;
 283         uint8_t *q, *row;
 284
 285         // Constants defined for clarity and optimisation
 286         int scanlength = screen->pitch / 2;
 287         uint16_t *start = ( uint16_t * )screen->pixels + rect.y * scanlength + rect.x;
 288         uint16_t *p;
 289
 290         // Iterate through the screen using a very basic scaling algorithm
 291         for ( y = 0; y < rect.h; y ++ )
 292         {
 293                 p = start;
 294                 row_index = ( 32768 + scale_height * y ) >> 16;
 295                 row = image + stride * row_index;
 296                 for ( x = 0; x < rect.w; x ++ )
 297                 {
 298                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 4 );
 299                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 300                 }
 301                 start += scanlength;
 302         }
 303 }
 304
 305 static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 306 {
 307         // Generate the affine transform scaling values
 308         if ( rect.w == 0 || rect.h == 0 ) return;
 309         int scale_width = ( width << 16 ) / rect.w;
 310         int scale_height = ( height << 16 ) / rect.h;
 311         int stride = width * 4;
 312         int x, y, row_index;
 313         uint8_t *q, *row;
 314
 315         // Constants defined for clarity and optimisation
 316         int scanlength = screen->pitch;
 317         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 318         uint8_t *p;
 319         uint32_t pixel;
 320
 321         // Iterate through the screen using a very basic scaling algorithm
 322         for ( y = 0; y < rect.h; y ++ )
 323         {
 324                 p = start;
 325                 row_index = ( 32768 + scale_height * y ) >> 16;
 326                 row = image + stride * row_index;
 327                 for ( x = 0; x < rect.w; x ++ )
 328                 {
 329                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 4 );
 330                         pixel = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 331                         *p ++ = (pixel & 0xFF0000) >> 16;
 332                         *p ++ = (pixel & 0x00FF00) >> 8;
 333                         *p ++ = (pixel & 0x0000FF);
 334                 }
 335                 start += scanlength;
 336         }
 337 }
 338
 339 static inline void display_4( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 340 {
 341         // Generate the affine transform scaling values
 342         if ( rect.w == 0 || rect.h == 0 ) return;
 343         int scale_width = ( width << 16 ) / rect.w;
 344         int scale_height = ( height << 16 ) / rect.h;
 345         int stride = width * 4;
 346         int x, y, row_index;
 347         uint8_t *q, *row;
 348
 349         // Constants defined for clarity and optimisation
 350         int scanlength = screen->pitch / 4;
 351         uint32_t *start = ( uint32_t * )screen->pixels + rect.y * scanlength + rect.x;
 352         uint32_t *p;
 353
 354         // Iterate through the screen using a very basic scaling algorithm
 355         for ( y = 0; y < rect.h; y ++ )
 356         {
 357                 p = start;
 358                 row_index = ( 32768 + scale_height * y ) >> 16;
 359                 row = image + stride * row_index;
 360                 for ( x = 0; x < rect.w; x ++ )
 361                 {
 362                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 4 );
 363                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 364                 }
 365                 start += scanlength;
 366         }
 367 }
 368
 369 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 370 {
 371         // Get the properties of this consumer
 372         mlt_properties properties = this->properties;
 373
 374         mlt_image_format vfmt = mlt_image_rgb24a;
 375         int height = this->height;
 376         int width = this->width;
 377         uint8_t *image = NULL;
 378         int changed = 0;
 379         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 380
 381         void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 382         void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 383
 384         if ( lock != NULL ) lock( );
 385         void *pool = mlt_cocoa_autorelease_init();
 386         sdl_lock_display();
 387
 388         // Handle events
 389         if ( SDL_GetVideoSurface() )
 390         {
 391                 SDL_Event event;
 392
 393                 pthread_mutex_lock( &mlt_sdl_mutex );
 394                 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 395                 pthread_mutex_unlock( &mlt_sdl_mutex );
 396
 397                 while ( SDL_PollEvent( &event ) )
 398                 {
 399                         mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 400
 401                         switch( event.type )
 402                         {
 403                                 case SDL_VIDEORESIZE:
 404                                         this->window_width = event.resize.w;
 405                                         this->window_height = event.resize.h;
 406                                         changed = 1;
 407                                         break;
 408                                 case SDL_QUIT:
 409                                         this->running = 0;
 410                                         break;
 411                                 case SDL_KEYDOWN:
 412                                         {
 413                                                 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 414                                                 char keyboard[ 2 ] = " ";
 415                                                 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 416                                                 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 417                                                 {
 418                                                         keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 419                                                         callback( producer, keyboard );
 420                                                 }
 421                                         }
 422                                         break;
 423                         }
 424                 }
 425         }
 426
 427         if ( !SDL_GetVideoSurface() || changed )
 428         {
 429                 // open SDL window
 430                 pthread_mutex_lock( &mlt_sdl_mutex );
 431                 SDL_Surface *screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 432                 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 433                         screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 434
 435                 if ( screen )
 436                 {
 437                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 438                         SDL_FillRect( screen, NULL, color >> 8 );
 439                         changed = 1;
 440                 }
 441                 pthread_mutex_unlock( &mlt_sdl_mutex );
 442         }
 443         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "test_audio", 1 );
 444         if ( changed == 0 &&
 445                  this->last_position == mlt_frame_get_position( frame ) &&
 446                  this->last_producer == mlt_frame_get_original_producer( frame ) &&
 447                  !mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "refresh" ) )
 448         {
 449                 sdl_unlock_display( );
 450                 mlt_cocoa_autorelease_close( pool );
 451                 if ( unlock != NULL ) unlock( );
 452                 struct timespec tm = { 0, 100000 };
 453                 nanosleep( &tm, NULL );
 454                 return 0;
 455         }
 456
 457         // Update last frame shown info
 458         this->last_position = mlt_frame_get_position( frame );
 459         this->last_producer = mlt_frame_get_original_producer( frame );
 460
 461         // Get the image, width and height
 462         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 463
 464         if ( image != NULL )
 465         {
 466                 char *rescale = mlt_properties_get( properties, "rescale" );
 467                 if ( rescale != NULL && strcmp( rescale, "none" ) )
 468                 {
 469                         double this_aspect = display_ratio / ( ( double )this->window_width / ( double )this->window_height );
 470                         this->rect.w = this_aspect * this->window_width;
 471                         this->rect.h = this->window_height;
 472                         if ( this->rect.w > this->window_width )
 473                         {
 474                                 this->rect.w = this->window_width;
 475                                 this->rect.h = ( 1.0 / this_aspect ) * this->window_height;
 476                         }
 477                 }
 478                 else
 479                 {
 480                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 481                         this->rect.w = frame_aspect * this->window_height;
 482                         this->rect.h = this->window_height;
 483                         if ( this->rect.w > this->window_width )
 484                         {
 485                                 this->rect.w = this->window_width;
 486                                 this->rect.h = ( 1.0 / frame_aspect ) * this->window_width;
 487                         }
 488                 }
 489
 490                 this->rect.x = ( this->window_width - this->rect.w ) / 2;
 491                 this->rect.y = ( this->window_height - this->rect.h ) / 2;
 492
 493                 mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 494                 mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 495                 mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 496                 mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 497         }
 498
 499         pthread_mutex_lock( &mlt_sdl_mutex );
 500         SDL_Surface *screen = SDL_GetVideoSurface( );
 501         if ( !mlt_consumer_is_stopped( &this->parent ) && screen && screen->pixels )
 502         {
 503                 switch( screen->format->BytesPerPixel )
 504                 {
 505                         case 1:
 506                                 display_1( screen, this->rect, image, width, height );
 507                                 break;
 508                         case 2:
 509                                 display_2( screen, this->rect, image, width, height );
 510                                 break;
 511                         case 3:
 512                                 display_3( screen, this->rect, image, width, height );
 513                                 break;
 514                         case 4:
 515                                 display_4( screen, this->rect, image, width, height );
 516                                 break;
 517                         default:
 518                                 fprintf( stderr, "Unsupported video depth %d\n", screen->format->BytesPerPixel );
 519                                 break;
 520                 }
 521
 522                 // Flip it into sight
 523                 SDL_Flip( screen );
 524         }
 525         pthread_mutex_unlock( &mlt_sdl_mutex );
 526
 527         sdl_unlock_display();
 528         mlt_cocoa_autorelease_close( pool );
 529         if ( unlock != NULL ) unlock( );
 530         mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 531
 532         return 1;
 533 }
 534
 535 /** Threaded wrapper for pipe.
 536 */
 537
 538 static void *consumer_thread( void *arg )
 539 {
 540         // Identify the arg
 541         consumer_sdl this = arg;
 542
 543         // Get the consumer
 544         mlt_consumer consumer = &this->parent;
 545         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 546         mlt_frame frame = NULL;
 547
 548         // Allow the hosting app to provide the preview
 549         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 550
 551         // Loop until told not to
 552         while( this->running )
 553         {
 554                 // Get a frame from the attached producer
 555                 frame = mlt_consumer_rt_frame( consumer );
 556
 557                 // Ensure that we have a frame
 558                 if ( this->running && frame != NULL )
 559                 {
 560                         if ( preview_off == 0 )
 561                         {
 562                                 consumer_play_video( this, frame );
 563                         }
 564                         else
 565                         {
 566                                 mlt_image_format vfmt = mlt_image_rgb24a;
 567                                 int height = this->height;
 568                                 int width = this->width;
 569                                 uint8_t *image = NULL;
 570                                 mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 571
 572                                 // Check if a specific colour space has been requested
 573                                 if ( preview_off && preview_format != mlt_image_none )
 574                                         vfmt = preview_format;
 575
 576                                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 577                                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 578                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 579                         }
 580                         mlt_frame_close( frame );
 581                 }
 582                 else
 583                 {
 584                         if ( frame ) mlt_frame_close( frame );
 585                         this->running = 0;
 586                 }
 587         }
 588
 589         return NULL;
 590 }
 591
 592 static int consumer_get_dimensions( int *width, int *height )
 593 {
 594         int changed = 0;
 595
 596         // SDL windows manager structure
 597         SDL_SysWMinfo wm;
 598
 599         // Specify the SDL Version
 600         SDL_VERSION( &wm.version );
 601
 602 #ifndef __DARWIN__
 603         // Get the wm structure
 604         if ( SDL_GetWMInfo( &wm ) == 1 )
 605         {
 606 #ifndef WIN32
 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 #endif
 630
 631         return changed;
 632 }
 633
 634 /** Callback to allow override of the close method.
 635 */
 636
 637 static void consumer_close( mlt_consumer parent )
 638 {
 639         // Get the actual object
 640         consumer_sdl this = parent->child;
 641
 642         // Stop the consumer
 643         mlt_consumer_stop( parent );
 644
 645         // Now clean up the rest
 646         mlt_consumer_close( parent );
 647
 648         // Finally clean up this
 649         free( this );
 650 }