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

   1 /*
   2  * consumer_sdl.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   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 <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <pthread.h>
  28 #include <SDL/SDL.h>
  29 #include <SDL/SDL_syswm.h>
  30 #include <sys/time.h>
  31
  32 /** This classes definition.
  33 */
  34
  35 typedef struct consumer_sdl_s *consumer_sdl;
  36
  37 struct consumer_sdl_s
  38 {
  39         struct mlt_consumer_s parent;
  40         mlt_properties properties;
  41         mlt_deque queue;
  42         pthread_t thread;
  43         int running;
  44         uint8_t audio_buffer[ 4096 * 10 ];
  45         int audio_avail;
  46         pthread_mutex_t audio_mutex;
  47         pthread_cond_t audio_cond;
  48         pthread_mutex_t video_mutex;
  49         pthread_cond_t video_cond;
  50         int window_width;
  51         int window_height;
  52         float aspect_ratio;
  53         float display_aspect;
  54         int width;
  55         int height;
  56         int playing;
  57         int sdl_flags;
  58         SDL_Surface *sdl_screen;
  59         SDL_Overlay *sdl_overlay;
  60         SDL_Rect rect;
  61         uint8_t *buffer;
  62 };
  63
  64 /** Forward references to static functions.
  65 */
  66
  67 static int consumer_start( mlt_consumer parent );
  68 static int consumer_stop( mlt_consumer parent );
  69 static int consumer_is_stopped( mlt_consumer parent );
  70 static void consumer_close( mlt_consumer parent );
  71 static void *consumer_thread( void * );
  72 static int consumer_get_dimensions( int *width, int *height );
  73
  74 /** This is what will be called by the factory - anything can be passed in
  75         via the argument, but keep it simple.
  76 */
  77
  78 mlt_consumer consumer_sdl_init( char *arg )
  79 {
  80         // Create the consumer object
  81         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  82
  83         // If no malloc'd and consumer init ok
  84         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  85         {
  86                 // Create the queue
  87                 this->queue = mlt_deque_init( );
  88
  89                 // Get the parent consumer object
  90                 mlt_consumer parent = &this->parent;
  91
  92                 // We have stuff to clean up, so override the close method
  93                 parent->close = consumer_close;
  94
  95                 // get a handle on properties
  96                 mlt_service service = mlt_consumer_service( parent );
  97                 this->properties = mlt_service_properties( service );
  98
  99                 // Set the default volume
 100                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 101
 102                 // This is the initialisation of the consumer
 103                 pthread_mutex_init( &this->audio_mutex, NULL );
 104                 pthread_cond_init( &this->audio_cond, NULL);
 105                 pthread_mutex_init( &this->video_mutex, NULL );
 106                 pthread_cond_init( &this->video_cond, NULL);
 107
 108                 // Default scaler (for now we'll use nearest)
 109                 mlt_properties_set( this->properties, "rescale", "nearest" );
 110
 111                 // Default buffer for low latency
 112                 mlt_properties_set_int( this->properties, "buffer", 1 );
 113
 114                 // Default progressive true
 115                 mlt_properties_set_int( this->properties, "progressive", 0 );
 116
 117                 // Default audio buffer
 118                 mlt_properties_set_int( this->properties, "audio_buffer", 1024 );
 119
 120                 // Get sample aspect ratio
 121                 this->aspect_ratio = mlt_properties_get_double( this->properties, "aspect_ratio" );
 122
 123                 // Default display aspect ratio
 124                 this->display_aspect = 4.0 / 3.0;
 125
 126                 // process actual param
 127                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 128                 {
 129                         this->width = mlt_properties_get_int( this->properties, "width" );
 130                         this->height = mlt_properties_get_int( this->properties, "height" );
 131
 132                         // Default window size
 133                         this->window_width = ( float )this->height * this->display_aspect + 0.5;
 134                         this->window_height = this->height;
 135                 }
 136                 else
 137                 {
 138                         if ( (int)( ( float )this->width / this->height * 1000 ) !=
 139                                  (int)( this->display_aspect * 1000 ) )
 140                         {
 141                                 // Override these
 142                                 this->display_aspect = ( float )this->width / this->height;
 143                                 this->aspect_ratio = 1.0;
 144                                 mlt_properties_set_double( this->properties, "aspect_ratio", this->aspect_ratio );
 145                         }
 146
 147                         // Set window size
 148                         this->window_width = this->width;
 149                         this->window_height = this->height;
 150                 }
 151
 152                 // Set the sdl flags
 153                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 154
 155                 // Allow thread to be started/stopped
 156                 parent->start = consumer_start;
 157                 parent->stop = consumer_stop;
 158                 parent->is_stopped = consumer_is_stopped;
 159
 160                 // Return the consumer produced
 161                 return parent;
 162         }
 163
 164         // malloc or consumer init failed
 165         free( this );
 166
 167         // Indicate failure
 168         return NULL;
 169 }
 170
 171 int consumer_start( mlt_consumer parent )
 172 {
 173         consumer_sdl this = parent->child;
 174
 175         if ( !this->running )
 176         {
 177                 pthread_attr_t thread_attributes;
 178
 179                 this->running = 1;
 180
 181                 // Allow the user to force resizing to window size
 182                 if ( mlt_properties_get_int( this->properties, "resize" ) )
 183                 {
 184                         mlt_properties_set_int( this->properties, "width", this->width );
 185                         mlt_properties_set_int( this->properties, "height", this->height );
 186                 }
 187
 188                 // Inherit the scheduling priority
 189                 pthread_attr_init( &thread_attributes );
 190                 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
 191
 192                 pthread_create( &this->thread, &thread_attributes, consumer_thread, this );
 193         }
 194
 195         return 0;
 196 }
 197
 198 int consumer_stop( mlt_consumer parent )
 199 {
 200         // Get the actual object
 201         consumer_sdl this = parent->child;
 202
 203         if ( this->running )
 204         {
 205                 // Kill the thread and clean up
 206                 this->running = 0;
 207
 208                 pthread_mutex_lock( &this->audio_mutex );
 209                 pthread_cond_broadcast( &this->audio_cond );
 210                 pthread_mutex_unlock( &this->audio_mutex );
 211
 212                 pthread_join( this->thread, NULL );
 213         }
 214
 215         return 0;
 216 }
 217
 218 int consumer_is_stopped( mlt_consumer parent )
 219 {
 220         consumer_sdl this = parent->child;
 221         return !this->running;
 222 }
 223
 224 static int sdl_lock_display( )
 225 {
 226         SDL_Surface *screen = SDL_GetVideoSurface( );
 227         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 228 }
 229
 230 static void sdl_unlock_display( )
 231 {
 232         SDL_Surface *screen = SDL_GetVideoSurface( );
 233         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 234                 SDL_UnlockSurface( screen );
 235 }
 236
 237 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 238 {
 239         consumer_sdl this = udata;
 240
 241         // Get the volume
 242         float volume = mlt_properties_get_double( this->properties, "volume" );
 243
 244         pthread_mutex_lock( &this->audio_mutex );
 245
 246         // Block until audio received
 247         while ( this->running && len > this->audio_avail )
 248                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 249
 250         if ( this->audio_avail >= len )
 251         {
 252                 // Place in the audio buffer
 253                 memcpy( stream, this->audio_buffer, len );
 254
 255                 // Remove len from the audio available
 256                 this->audio_avail -= len;
 257
 258                 // Remove the samples
 259                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 260         }
 261         else
 262         {
 263                 // Just to be safe, wipe the stream first
 264                 memset( stream, 0, len );
 265
 266                 // Copy what we have into the stream
 267                 memcpy( stream, this->audio_buffer, this->audio_avail );
 268
 269                 // Mix the audio
 270                 SDL_MixAudio( stream, stream, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 271
 272                 // No audio left
 273                 this->audio_avail = 0;
 274         }
 275
 276         // We're definitely playing now
 277         this->playing = 1;
 278
 279         pthread_cond_broadcast( &this->audio_cond );
 280         pthread_mutex_unlock( &this->audio_mutex );
 281 }
 282
 283 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 284 {
 285         // Get the properties of this consumer
 286         mlt_properties properties = this->properties;
 287         mlt_audio_format afmt = mlt_audio_pcm;
 288
 289         // Set the preferred params of the test card signal
 290         int channels = mlt_properties_get_int( properties, "channels" );
 291         int frequency = mlt_properties_get_int( properties, "frequency" );
 292         static int counter = 0;
 293
 294         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 295
 296         int16_t *pcm;
 297         int bytes;
 298
 299         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 300         *duration = ( ( samples * 1000 ) / frequency );
 301
 302         if ( mlt_properties_get_int( properties, "audio_off" ) )
 303         {
 304                 this->playing = 1;
 305                 init_audio = 1;
 306                 return init_audio;
 307         }
 308
 309         if ( init_audio == 1 )
 310         {
 311                 SDL_AudioSpec request;
 312                 SDL_AudioSpec got;
 313
 314                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 315
 316                 // specify audio format
 317                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 318                 this->playing = 0;
 319                 request.freq = frequency;
 320                 request.format = AUDIO_S16;
 321                 request.channels = channels;
 322                 request.samples = audio_buffer;
 323                 request.callback = sdl_fill_audio;
 324                 request.userdata = (void *)this;
 325                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 326                 {
 327                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 328                         init_audio = 2;
 329                 }
 330                 else if ( got.size != 0 )
 331                 {
 332                         SDL_PauseAudio( 0 );
 333                         init_audio = 0;
 334                 }
 335         }
 336
 337         if ( init_audio == 0 )
 338         {
 339                 mlt_properties properties = mlt_frame_properties( frame );
 340                 bytes = ( samples * channels * 2 );
 341                 pthread_mutex_lock( &this->audio_mutex );
 342                 while ( bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 343                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 344                 if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 345                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 346                 else
 347                         memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 348                 this->audio_avail += bytes;
 349                 pthread_cond_broadcast( &this->audio_cond );
 350                 pthread_mutex_unlock( &this->audio_mutex );
 351         }
 352         else
 353         {
 354                 this->playing = 1;
 355         }
 356
 357         return init_audio;
 358 }
 359
 360 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 361 {
 362         // Get the properties of this consumer
 363         mlt_properties properties = this->properties;
 364
 365         mlt_image_format vfmt = mlt_image_yuv422;
 366         int width = this->width, height = this->height;
 367         uint8_t *image;
 368         int changed = 0;
 369
 370         if ( mlt_properties_get_int( properties, "video_off" ) == 0 )
 371         {
 372                 // Get the image, width and height
 373                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 374
 375                 // Handle events
 376                 if ( this->sdl_screen != NULL )
 377                 {
 378                         SDL_Event event;
 379
 380                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 381
 382                         while ( SDL_PollEvent( &event ) )
 383                         {
 384                                 switch( event.type )
 385                                 {
 386                                         case SDL_VIDEORESIZE:
 387                                                 this->window_width = event.resize.w;
 388                                                 this->window_height = event.resize.h;
 389                                                 changed = 1;
 390                                                 break;
 391                                         case SDL_QUIT:
 392                                                 this->running = 0;
 393                                                 break;
 394                                         case SDL_KEYDOWN:
 395                                                 {
 396                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 397                                                         char keyboard[ 2 ] = " ";
 398                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 399                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 400                                                         {
 401                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 402                                                                 callback( producer, keyboard );
 403                                                         }
 404                                                 }
 405                                                 break;
 406                                 }
 407                         }
 408                 }
 409
 410                 if ( width != this->width || height != this->height )
 411                 {
 412                         this->width = width;
 413                         this->height = height;
 414                         changed = 1;
 415                 }
 416
 417                 if ( this->sdl_screen == NULL || changed )
 418                 {
 419                         // Determine frame's display aspect ratio
 420                         float frame_aspect = mlt_frame_get_aspect_ratio( frame ) * this->width / this->height;
 421
 422                         // Determine window's new display aspect ratio
 423                         float this_aspect = ( float )this->window_width / this->window_height;
 424
 425                         // If using hardware scaler
 426                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 427                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 428                         {
 429                                 // Special case optimisation to negate odd effect of sample aspect ratio
 430                                 // not corresponding exactly with image resolution.
 431                                 if ( ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) ) &&
 432                                          ( (int)( mlt_frame_get_aspect_ratio( frame ) * 1000 ) == (int)( this->aspect_ratio * 1000 ) ) )
 433                                 {
 434                                         this->rect.w = this->window_width;
 435                                         this->rect.h = this->window_height;
 436                                 }
 437                                 else
 438                                 {
 439                                         // Use hardware scaler to normalise display aspect ratio
 440                                         this->rect.w = frame_aspect / this_aspect * this->window_width + 0.5;
 441                                         this->rect.h = this->window_height;
 442                                         if ( this->rect.w > this->window_width )
 443                                         {
 444                                                 this->rect.w = this->window_width;
 445                                                 this->rect.h = this_aspect / frame_aspect * this->window_height + 0.5;
 446                                         }
 447                                 }
 448                         }
 449                         // Special case optimisation to negate odd effect of sample aspect ratio
 450                         // not corresponding exactly with image resolution.
 451                         else if ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) )
 452                         {
 453                                 this->rect.w = this->window_width;
 454                                 this->rect.h = this->window_height;
 455                         }
 456                         // Use hardware scaler to normalise sample aspect ratio
 457                         else if ( this->window_height * this->display_aspect > this->window_width )
 458                         {
 459                                 this->rect.w = this->window_width;
 460                                 this->rect.h = this->window_width / this->display_aspect + 0.5;
 461                         }
 462                         else
 463                         {
 464                                 this->rect.w = this->window_height * this->display_aspect + 0.5;
 465                                 this->rect.h = this->window_height;
 466                         }
 467
 468                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 469                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 470
 471                         // Force an overlay recreation
 472                         if ( this->sdl_overlay != NULL )
 473                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 474
 475                         // open SDL window with video overlay, if possible
 476                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 477
 478                         if ( this->sdl_screen != NULL )
 479                         {
 480                                 SDL_SetClipRect( this->sdl_screen, &this->rect );
 481                                 sdl_lock_display();
 482                                 this->sdl_overlay = SDL_CreateYUVOverlay( this->width, this->height, SDL_YUY2_OVERLAY, this->sdl_screen );
 483                                 sdl_unlock_display();
 484                         }
 485                 }
 486
 487                 if ( mlt_properties_get_int( properties, "changed" ) )
 488                 {
 489                         sdl_lock_display();
 490                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 491                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 492                         SDL_Flip( this->sdl_screen );
 493                         sdl_unlock_display();
 494                         mlt_properties_set_int( properties, "changed", 0 );
 495                 }
 496
 497                 if ( this->sdl_screen != NULL && this->sdl_overlay != NULL )
 498                 {
 499                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 500                         sdl_lock_display();
 501                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 502                         {
 503                                 if ( image != NULL )
 504                                         memcpy( this->buffer, image, width * height * 2 );
 505                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 506                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 507                         }
 508                         sdl_unlock_display();
 509                 }
 510         }
 511
 512         return 0;
 513 }
 514
 515 static void *video_thread( void *arg )
 516 {
 517         // Identify the arg
 518         consumer_sdl this = arg;
 519
 520         // Obtain time of thread start
 521         struct timeval now;
 522         int64_t start = 0;
 523         int64_t elapsed = 0;
 524         struct timespec tm;
 525         mlt_frame next = NULL;
 526         mlt_properties properties = NULL;
 527         double speed = 0;
 528
 529         // Get the current time
 530         gettimeofday( &now, NULL );
 531
 532         // Determine start time
 533         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 534
 535         while ( this->running )
 536         {
 537                 // Pop the next frame
 538                 pthread_mutex_lock( &this->video_mutex );
 539                 while ( ( next = mlt_deque_pop_front( this->queue ) ) == NULL && this->running )
 540                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 541                 pthread_mutex_unlock( &this->video_mutex );
 542
 543                 // Get the properties
 544                 properties =  mlt_frame_properties( next );
 545
 546                 // Get the speed of the frame
 547                 speed = mlt_properties_get_double( properties, "_speed" );
 548
 549                 // Get the current time
 550                 gettimeofday( &now, NULL );
 551
 552                 // Get the elapsed time
 553                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 554
 555                 // See if we have to delay the display of the current frame
 556                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 557                 {
 558                         // Obtain the scheduled playout time
 559                         mlt_position scheduled = mlt_properties_get_position( properties, "playtime" );
 560
 561                         // Determine the difference between the elapsed time and the scheduled playout time
 562                         mlt_position difference = scheduled - elapsed;
 563
 564                         // Smooth playback a bit
 565                         if ( difference > 20000 && speed == 1.0 )
 566                         {
 567                                 tm.tv_sec = difference / 1000000;
 568                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 569                                 nanosleep( &tm, NULL );
 570                         }
 571
 572                         // Show current frame if not too old
 573                         if ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 )
 574                                 consumer_play_video( this, next );
 575
 576                         // If the queue is empty, recalculate start to allow build up again
 577                         if ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 )
 578                         {
 579                                 gettimeofday( &now, NULL );
 580                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 581                         }
 582                 }
 583
 584                 // This frame can now be closed
 585                 mlt_frame_close( next );
 586         }
 587
 588         return NULL;
 589 }
 590
 591 /** Threaded wrapper for pipe.
 592 */
 593
 594 static void *consumer_thread( void *arg )
 595 {
 596         // Identify the arg
 597         consumer_sdl this = arg;
 598
 599         // Get the consumer
 600         mlt_consumer consumer = &this->parent;
 601
 602         // Video thread
 603         pthread_t thread;
 604
 605         // internal intialization
 606         int init_audio = 1;
 607         int init_video = 1;
 608         mlt_frame frame = NULL;
 609         mlt_properties properties = NULL;
 610         int duration = 0;
 611         int64_t playtime = 0;
 612
 613         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_NOPARACHUTE ) < 0 )
 614         {
 615                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 616                 return NULL;
 617         }
 618
 619         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 620         SDL_EnableUNICODE( 1 );
 621
 622         // Loop until told not to
 623         while( this->running )
 624         {
 625                 // Get a frame from the attached producer
 626                 frame = mlt_consumer_rt_frame( consumer );
 627
 628                 // Ensure that we have a frame
 629                 if ( frame != NULL )
 630                 {
 631                         // Get the frame properties
 632                         properties =  mlt_frame_properties( frame );
 633
 634                         // Play audio
 635                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 636
 637                         // Determine the start time now
 638                         if ( this->playing && init_video )
 639                         {
 640                                 // Create the video thread
 641                                 pthread_create( &thread, NULL, video_thread, this );
 642
 643                                 // Video doesn't need to be initialised any more
 644                                 init_video = 0;
 645                         }
 646
 647                         // Set playtime for this frame
 648                         mlt_properties_set_position( properties, "playtime", playtime );
 649
 650                         // Push this frame to the back of the queue
 651                         pthread_mutex_lock( &this->video_mutex );
 652                         mlt_deque_push_back( this->queue, frame );
 653                         pthread_cond_broadcast( &this->video_cond );
 654                         pthread_mutex_unlock( &this->video_mutex );
 655
 656                         // Calculate the next playtime
 657                         playtime += ( duration * 1000 );
 658                 }
 659         }
 660
 661         // Kill the video thread
 662         if ( init_video == 0 )
 663         {
 664                 pthread_mutex_lock( &this->video_mutex );
 665                 pthread_cond_broadcast( &this->video_cond );
 666                 pthread_mutex_unlock( &this->video_mutex );
 667                 pthread_join( thread, NULL );
 668         }
 669
 670         // internal cleanup
 671         if ( this->sdl_overlay != NULL )
 672                 SDL_FreeYUVOverlay( this->sdl_overlay );
 673         SDL_Quit( );
 674
 675         while( mlt_deque_count( this->queue ) )
 676                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 677
 678         this->sdl_screen = NULL;
 679         this->sdl_overlay = NULL;
 680         this->audio_avail = 0;
 681
 682         return NULL;
 683 }
 684
 685 static int consumer_get_dimensions( int *width, int *height )
 686 {
 687         int changed = 0;
 688
 689         // SDL windows manager structure
 690         SDL_SysWMinfo wm;
 691
 692         // Specify the SDL Version
 693         SDL_VERSION( &wm.version );
 694
 695         // Get the wm structure
 696         if ( SDL_GetWMInfo( &wm ) == 1 )
 697         {
 698                 // Check that we have the X11 wm
 699                 if ( wm.subsystem == SDL_SYSWM_X11 )
 700                 {
 701                         // Get the SDL window
 702                         Window window = wm.info.x11.window;
 703
 704                         // Get the display session
 705                         Display *display = wm.info.x11.display;
 706
 707                         // Get the window attributes
 708                         XWindowAttributes attr;
 709                         XGetWindowAttributes( display, window, &attr );
 710
 711                         // Determine whether window has changed
 712                         changed = *width != attr.width || *height != attr.height;
 713
 714                         // Return width and height
 715                         *width = attr.width;
 716                         *height = attr.height;
 717                 }
 718         }
 719
 720         return changed;
 721 }
 722
 723 /** Callback to allow override of the close method.
 724 */
 725
 726 static void consumer_close( mlt_consumer parent )
 727 {
 728         // Get the actual object
 729         consumer_sdl this = parent->child;
 730
 731         // Stop the consumer
 732         mlt_consumer_stop( parent );
 733
 734         // Close the queue
 735         mlt_deque_close( this->queue );
 736
 737         // Destroy mutexes
 738         pthread_mutex_destroy( &this->audio_mutex );
 739         pthread_cond_destroy( &this->audio_cond );
 740
 741         // Now clean up the rest
 742         mlt_consumer_close( parent );
 743
 744         // Finally clean up this
 745         free( this );
 746 }