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 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 <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         mlt_deque queue;
  44         pthread_t thread;
  45         int joined;
  46         int running;
  47         uint8_t audio_buffer[ 4096 * 10 ];
  48         int audio_avail;
  49         pthread_mutex_t audio_mutex;
  50         pthread_cond_t audio_cond;
  51         pthread_mutex_t video_mutex;
  52         pthread_cond_t video_cond;
  53         int window_width;
  54         int window_height;
  55         int previous_width;
  56         int previous_height;
  57         int width;
  58         int height;
  59         int playing;
  60         int sdl_flags;
  61         SDL_Surface *sdl_screen;
  62         SDL_Overlay *sdl_overlay;
  63         SDL_Rect rect;
  64         uint8_t *buffer;
  65         int bpp;
  66         int filtered;
  67 };
  68
  69 /** Forward references to static functions.
  70 */
  71
  72 static int consumer_start( mlt_consumer parent );
  73 static int consumer_stop( mlt_consumer parent );
  74 static int consumer_is_stopped( mlt_consumer parent );
  75 static void consumer_close( mlt_consumer parent );
  76 static void *consumer_thread( void * );
  77 static int consumer_get_dimensions( int *width, int *height );
  78 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  79
  80 /** This is what will be called by the factory - anything can be passed in
  81         via the argument, but keep it simple.
  82 */
  83
  84 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  85 {
  86         // Create the consumer object
  87         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  88
  89         // If no malloc'd and consumer init ok
  90         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  91         {
  92                 // Create the queue
  93                 this->queue = mlt_deque_init( );
  94
  95                 // Get the parent consumer object
  96                 mlt_consumer parent = &this->parent;
  97
  98                 // We have stuff to clean up, so override the close method
  99                 parent->close = consumer_close;
 100
 101                 // get a handle on properties
 102                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 103                 this->properties = MLT_SERVICE_PROPERTIES( service );
 104
 105                 // Set the default volume
 106                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 107
 108                 // This is the initialisation of the consumer
 109                 pthread_mutex_init( &this->audio_mutex, NULL );
 110                 pthread_cond_init( &this->audio_cond, NULL);
 111                 pthread_mutex_init( &this->video_mutex, NULL );
 112                 pthread_cond_init( &this->video_cond, NULL);
 113
 114                 // Default scaler (for now we'll use nearest)
 115                 mlt_properties_set( this->properties, "rescale", "nearest" );
 116
 117                 // Default buffer for low latency
 118                 mlt_properties_set_int( this->properties, "buffer", 1 );
 119
 120                 // Default progressive true
 121                 mlt_properties_set_int( this->properties, "progressive", 0 );
 122
 123                 // Default audio buffer
 124                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 125
 126                 // Ensure we don't join on a non-running object
 127                 this->joined = 1;
 128
 129                 // process actual param
 130                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 131                 {
 132                         this->width = mlt_properties_get_int( this->properties, "width" );
 133                         this->height = mlt_properties_get_int( this->properties, "height" );
 134                 }
 135
 136                 // Set the sdl flags
 137                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 138
 139                 // Allow thread to be started/stopped
 140                 parent->start = consumer_start;
 141                 parent->stop = consumer_stop;
 142                 parent->is_stopped = consumer_is_stopped;
 143
 144                 // Register specific events
 145                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 146
 147                 // Return the consumer produced
 148                 return parent;
 149         }
 150
 151         // malloc or consumer init failed
 152         free( this );
 153
 154         // Indicate failure
 155         return NULL;
 156 }
 157
 158 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 159 {
 160         if ( listener != NULL )
 161                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 162 }
 163
 164 int consumer_start( mlt_consumer parent )
 165 {
 166         consumer_sdl this = parent->child;
 167
 168         if ( !this->running )
 169         {
 170                 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
 171                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 172                 int display_off = video_off | preview_off;
 173                 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
 174                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 175
 176                 consumer_stop( parent );
 177
 178                 this->running = 1;
 179                 this->joined = 0;
 180
 181                 if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 182                         this->width = mlt_properties_get_int( this->properties, "width" );
 183                 if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 184                         this->height = mlt_properties_get_int( this->properties, "height" );
 185
 186                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 187
 188                 // Attach a colour space converter
 189                 if ( preview_off && !this->filtered )
 190                 {
 191                         mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( parent ) );
 192                         mlt_filter filter = mlt_factory_filter( profile, "avcolour_space", NULL );
 193                         mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "forced", mlt_image_yuv422 );
 194                         mlt_service_attach( MLT_CONSUMER_SERVICE( parent ), filter );
 195                         mlt_filter_close( filter );
 196                         this->filtered = 1;
 197                 }
 198
 199                 if ( sdl_started == 0 && display_off == 0 )
 200                 {
 201                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 202                         {
 203                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 204                                 return -1;
 205                         }
 206
 207                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 208                         SDL_EnableUNICODE( 1 );
 209                 }
 210                 else if ( display_off == 0 )
 211                 {
 212                         this->sdl_screen = SDL_GetVideoSurface( );
 213                 }
 214
 215                 if ( audio_off == 0 )
 216                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 217
 218                 // Default window size
 219                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 220                 this->window_width = ( double )this->height * display_ratio;
 221                 this->window_height = this->height;
 222
 223                 if ( this->sdl_screen == NULL && display_off == 0 )
 224                 {
 225                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 226                         {
 227                                 const SDL_VideoInfo *vi = SDL_GetVideoInfo();
 228                                 this->window_width = vi->current_w;
 229                                 this->window_height = vi->current_h;
 230                                 this->sdl_flags |= SDL_FULLSCREEN;
 231                                 SDL_ShowCursor( SDL_DISABLE );
 232                         }
 233                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 234                 }
 235
 236                 pthread_create( &this->thread, NULL, consumer_thread, this );
 237         }
 238
 239         return 0;
 240 }
 241
 242 int consumer_stop( mlt_consumer parent )
 243 {
 244         // Get the actual object
 245         consumer_sdl this = parent->child;
 246
 247         if ( this->joined == 0 )
 248         {
 249                 // Kill the thread and clean up
 250                 this->joined = 1;
 251                 this->running = 0;
 252                 pthread_join( this->thread, NULL );
 253
 254                 // internal cleanup
 255                 if ( this->sdl_overlay != NULL )
 256                         SDL_FreeYUVOverlay( this->sdl_overlay );
 257                 this->sdl_overlay = NULL;
 258
 259                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 260                 {
 261                         pthread_mutex_lock( &this->audio_mutex );
 262                         pthread_cond_broadcast( &this->audio_cond );
 263                         pthread_mutex_unlock( &this->audio_mutex );
 264                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 265                 }
 266
 267                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 268                         SDL_Quit( );
 269
 270                 this->sdl_screen = NULL;
 271         }
 272
 273         return 0;
 274 }
 275
 276 int consumer_is_stopped( mlt_consumer parent )
 277 {
 278         consumer_sdl this = parent->child;
 279         return !this->running;
 280 }
 281
 282 static int sdl_lock_display( )
 283 {
 284         SDL_Surface *screen = SDL_GetVideoSurface( );
 285         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 286 }
 287
 288 static void sdl_unlock_display( )
 289 {
 290         SDL_Surface *screen = SDL_GetVideoSurface( );
 291         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 292                 SDL_UnlockSurface( screen );
 293 }
 294
 295 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 296 {
 297         consumer_sdl this = udata;
 298
 299         // Get the volume
 300         double volume = mlt_properties_get_double( this->properties, "volume" );
 301
 302         pthread_mutex_lock( &this->audio_mutex );
 303
 304         // Block until audio received
 305         while ( this->running && len > this->audio_avail )
 306                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 307
 308         if ( this->audio_avail >= len )
 309         {
 310                 // Place in the audio buffer
 311                 if ( volume != 1.0 )
 312                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 313                 else
 314                         memcpy( stream, this->audio_buffer, len );
 315
 316                 // Remove len from the audio available
 317                 this->audio_avail -= len;
 318
 319                 // Remove the samples
 320                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 321         }
 322         else
 323         {
 324                 // Just to be safe, wipe the stream first
 325                 memset( stream, 0, len );
 326
 327                 // Mix the audio
 328                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 329
 330                 // No audio left
 331                 this->audio_avail = 0;
 332         }
 333
 334         // We're definitely playing now
 335         this->playing = 1;
 336
 337         pthread_cond_broadcast( &this->audio_cond );
 338         pthread_mutex_unlock( &this->audio_mutex );
 339 }
 340
 341 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 342 {
 343         // Get the properties of this consumer
 344         mlt_properties properties = this->properties;
 345         mlt_audio_format afmt = mlt_audio_pcm;
 346
 347         // Set the preferred params of the test card signal
 348         int channels = mlt_properties_get_int( properties, "channels" );
 349         int frequency = mlt_properties_get_int( properties, "frequency" );
 350         static int counter = 0;
 351
 352         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 353
 354         int16_t *pcm;
 355         int bytes;
 356
 357         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 358         *duration = ( ( samples * 1000 ) / frequency );
 359
 360         if ( mlt_properties_get_int( properties, "audio_off" ) )
 361         {
 362                 this->playing = 1;
 363                 init_audio = 1;
 364                 return init_audio;
 365         }
 366
 367         if ( init_audio == 1 )
 368         {
 369                 SDL_AudioSpec request;
 370                 SDL_AudioSpec got;
 371
 372                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 373
 374                 // specify audio format
 375                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 376                 this->playing = 0;
 377                 request.freq = frequency;
 378                 request.format = AUDIO_S16SYS;
 379                 request.channels = channels;
 380                 request.samples = audio_buffer;
 381                 request.callback = sdl_fill_audio;
 382                 request.userdata = (void *)this;
 383                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 384                 {
 385                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 386                         init_audio = 2;
 387                 }
 388                 else if ( got.size != 0 )
 389                 {
 390                         SDL_PauseAudio( 0 );
 391                         init_audio = 0;
 392                 }
 393         }
 394
 395         if ( init_audio == 0 )
 396         {
 397                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 398                 bytes = ( samples * channels * 2 );
 399                 pthread_mutex_lock( &this->audio_mutex );
 400                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 401                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 402                 if ( this->running )
 403                 {
 404                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 405                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 406                         else
 407                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 408                         this->audio_avail += bytes;
 409                 }
 410                 pthread_cond_broadcast( &this->audio_cond );
 411                 pthread_mutex_unlock( &this->audio_mutex );
 412         }
 413         else
 414         {
 415                 this->playing = 1;
 416         }
 417
 418         return init_audio;
 419 }
 420
 421 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 422 {
 423         // Get the properties of this consumer
 424         mlt_properties properties = this->properties;
 425
 426         mlt_image_format vfmt = mlt_image_yuv422;
 427         int width = this->width, height = this->height;
 428         uint8_t *image;
 429         int changed = 0;
 430
 431         int video_off = mlt_properties_get_int( properties, "video_off" );
 432         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 433         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 434         int display_off = video_off | preview_off;
 435
 436         if ( this->running && display_off == 0 )
 437         {
 438                 // Get the image, width and height
 439                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 440                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 441                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 442
 443                 // Handle events
 444                 if ( this->sdl_screen != NULL )
 445                 {
 446                         SDL_Event event;
 447
 448                         sdl_lock_display( );
 449                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 450                         sdl_unlock_display( );
 451
 452                         while ( SDL_PollEvent( &event ) )
 453                         {
 454                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 455
 456                                 switch( event.type )
 457                                 {
 458                                         case SDL_VIDEORESIZE:
 459                                                 this->window_width = event.resize.w;
 460                                                 this->window_height = event.resize.h;
 461                                                 changed = 1;
 462                                                 break;
 463                                         case SDL_QUIT:
 464                                                 this->running = 0;
 465                                                 break;
 466                                         case SDL_KEYDOWN:
 467                                                 {
 468                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 469                                                         char keyboard[ 2 ] = " ";
 470                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 471                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 472                                                         {
 473                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 474                                                                 callback( producer, keyboard );
 475                                                         }
 476                                                 }
 477                                                 break;
 478                                 }
 479                         }
 480                 }
 481
 482                 sdl_lock_display();
 483
 484                 if ( width != this->width || height != this->height )
 485                 {
 486                         if ( this->sdl_overlay != NULL )
 487                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 488                         this->sdl_overlay = NULL;
 489                 }
 490
 491                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 492                 {
 493                         // Force an overlay recreation
 494                         if ( this->sdl_overlay != NULL )
 495                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 496                         this->sdl_overlay = NULL;
 497
 498                         // open SDL window with video overlay, if possible
 499                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 500                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 501                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 502                 }
 503
 504                 if ( this->running )
 505                 {
 506                         // Determine window's new display aspect ratio
 507                         double this_aspect = ( double )this->window_width / this->window_height;
 508
 509                         // Get the display aspect ratio
 510                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 511
 512                         // Determine frame's display aspect ratio
 513                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 514
 515                         // Store the width and height received
 516                         this->width = width;
 517                         this->height = height;
 518
 519                         // If using hardware scaler
 520                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 521                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 522                         {
 523                                 // Use hardware scaler to normalise display aspect ratio
 524                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 525                                 this->rect.h = this->window_height;
 526                                 if ( this->rect.w > this->window_width )
 527                                 {
 528                                         this->rect.w = this->window_width;
 529                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 530                                 }
 531                         }
 532                         // Special case optimisation to negate odd effect of sample aspect ratio
 533                         // not corresponding exactly with image resolution.
 534                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 535                         {
 536                                 this->rect.w = this->window_width;
 537                                 this->rect.h = this->window_height;
 538                         }
 539                         // Use hardware scaler to normalise sample aspect ratio
 540                         else if ( this->window_height * display_ratio > this->window_width )
 541                         {
 542                                 this->rect.w = this->window_width;
 543                                 this->rect.h = this->window_width / display_ratio;
 544                         }
 545                         else
 546                         {
 547                                 this->rect.w = this->window_height * display_ratio;
 548                                 this->rect.h = this->window_height;
 549                         }
 550
 551                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 552                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 553                         this->rect.x -= this->rect.x % 2;
 554
 555                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 556                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 557                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 558                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 559
 560                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 561                 }
 562
 563                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 564                 {
 565                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 566                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 567                 }
 568
 569                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 570                 {
 571                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 572                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 573                         {
 574                                 if ( image != NULL )
 575                                         memcpy( this->buffer, image, width * height * 2 );
 576                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 577                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 578                         }
 579                 }
 580
 581                 sdl_unlock_display();
 582         }
 583         else if ( this->running )
 584         {
 585                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 586                 if ( !video_off )
 587                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 588                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 589                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 590         }
 591
 592         return 0;
 593 }
 594
 595 static void *video_thread( void *arg )
 596 {
 597         // Identify the arg
 598         consumer_sdl this = arg;
 599
 600         // Obtain time of thread start
 601         struct timeval now;
 602         int64_t start = 0;
 603         int64_t elapsed = 0;
 604         struct timespec tm;
 605         mlt_frame next = NULL;
 606         mlt_properties properties = NULL;
 607         double speed = 0;
 608
 609         // Get real time flag
 610         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 611
 612         // Get the current time
 613         gettimeofday( &now, NULL );
 614
 615         // Determine start time
 616         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 617
 618         while ( this->running )
 619         {
 620                 // Pop the next frame
 621                 pthread_mutex_lock( &this->video_mutex );
 622                 next = mlt_deque_pop_front( this->queue );
 623                 while ( next == NULL && this->running )
 624                 {
 625                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 626                         next = mlt_deque_pop_front( this->queue );
 627                 }
 628                 pthread_mutex_unlock( &this->video_mutex );
 629
 630                 if ( !this->running || next == NULL ) break;
 631
 632                 // Get the properties
 633                 properties =  MLT_FRAME_PROPERTIES( next );
 634
 635                 // Get the speed of the frame
 636                 speed = mlt_properties_get_double( properties, "_speed" );
 637
 638                 // Get the current time
 639                 gettimeofday( &now, NULL );
 640
 641                 // Get the elapsed time
 642                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 643
 644                 // See if we have to delay the display of the current frame
 645                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 646                 {
 647                         // Obtain the scheduled playout time
 648                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 649
 650                         // Determine the difference between the elapsed time and the scheduled playout time
 651                         int64_t difference = scheduled - elapsed;
 652
 653                         // Smooth playback a bit
 654                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 655                         {
 656                                 tm.tv_sec = difference / 1000000;
 657                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 658                                 nanosleep( &tm, NULL );
 659                         }
 660
 661                         // Show current frame if not too old
 662                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 663                                 consumer_play_video( this, next );
 664
 665                         // If the queue is empty, recalculate start to allow build up again
 666                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 667                         {
 668                                 gettimeofday( &now, NULL );
 669                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 670                         }
 671                 }
 672
 673                 // This frame can now be closed
 674                 mlt_frame_close( next );
 675                 next = NULL;
 676         }
 677
 678         if ( next != NULL )
 679                 mlt_frame_close( next );
 680
 681         mlt_consumer_stopped( &this->parent );
 682
 683         return NULL;
 684 }
 685
 686 /** Threaded wrapper for pipe.
 687 */
 688
 689 static void *consumer_thread( void *arg )
 690 {
 691         // Identify the arg
 692         consumer_sdl this = arg;
 693
 694         // Get the consumer
 695         mlt_consumer consumer = &this->parent;
 696
 697         // Convenience functionality
 698         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 699         int terminated = 0;
 700
 701         // Video thread
 702         pthread_t thread;
 703
 704         // internal intialization
 705         int init_audio = 1;
 706         int init_video = 1;
 707         mlt_frame frame = NULL;
 708         mlt_properties properties = NULL;
 709         int duration = 0;
 710         int64_t playtime = 0;
 711         struct timespec tm = { 0, 100000 };
 712
 713         // Loop until told not to
 714         while( !terminated && this->running )
 715         {
 716                 // Get a frame from the attached producer
 717                 frame = mlt_consumer_rt_frame( consumer );
 718
 719                 // Check for termination
 720                 if ( terminate_on_pause && frame != NULL )
 721                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 722
 723                 // Ensure that we have a frame
 724                 if ( frame != NULL )
 725                 {
 726                         // Get the frame properties
 727                         properties =  MLT_FRAME_PROPERTIES( frame );
 728
 729                         // Play audio
 730                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 731
 732                         // Determine the start time now
 733                         if ( this->playing && init_video )
 734                         {
 735                                 // Create the video thread
 736                                 pthread_create( &thread, NULL, video_thread, this );
 737
 738                                 // Video doesn't need to be initialised any more
 739                                 init_video = 0;
 740                         }
 741
 742                         // Set playtime for this frame
 743                         mlt_properties_set_int( properties, "playtime", playtime );
 744
 745                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 746                                 nanosleep( &tm, NULL );
 747
 748                         // Push this frame to the back of the queue
 749                         pthread_mutex_lock( &this->video_mutex );
 750                         mlt_deque_push_back( this->queue, frame );
 751                         pthread_cond_broadcast( &this->video_cond );
 752                         pthread_mutex_unlock( &this->video_mutex );
 753
 754                         // Calculate the next playtime
 755                         playtime += ( duration * 1000 );
 756                 }
 757         }
 758
 759         this->running = 0;
 760
 761         // Kill the video thread
 762         if ( init_video == 0 )
 763         {
 764                 pthread_mutex_lock( &this->video_mutex );
 765                 pthread_cond_broadcast( &this->video_cond );
 766                 pthread_mutex_unlock( &this->video_mutex );
 767                 pthread_join( thread, NULL );
 768         }
 769
 770         while( mlt_deque_count( this->queue ) )
 771                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 772
 773         this->sdl_screen = NULL;
 774         this->audio_avail = 0;
 775
 776         return NULL;
 777 }
 778
 779 static int consumer_get_dimensions( int *width, int *height )
 780 {
 781         int changed = 0;
 782
 783         // SDL windows manager structure
 784         SDL_SysWMinfo wm;
 785
 786         // Specify the SDL Version
 787         SDL_VERSION( &wm.version );
 788
 789         // Lock the display
 790         //sdl_lock_display();
 791
 792 #ifndef __DARWIN__
 793         // Get the wm structure
 794         if ( SDL_GetWMInfo( &wm ) == 1 )
 795         {
 796                 // Check that we have the X11 wm
 797                 if ( wm.subsystem == SDL_SYSWM_X11 )
 798                 {
 799                         // Get the SDL window
 800                         Window window = wm.info.x11.window;
 801
 802                         // Get the display session
 803                         Display *display = wm.info.x11.display;
 804
 805                         // Get the window attributes
 806                         XWindowAttributes attr;
 807                         XGetWindowAttributes( display, window, &attr );
 808
 809                         // Determine whether window has changed
 810                         changed = *width != attr.width || *height != attr.height;
 811
 812                         // Return width and height
 813                         *width = attr.width;
 814                         *height = attr.height;
 815                 }
 816         }
 817 #endif
 818
 819         // Unlock the display
 820         //sdl_unlock_display();
 821
 822         return changed;
 823 }
 824
 825 /** Callback to allow override of the close method.
 826 */
 827
 828 static void consumer_close( mlt_consumer parent )
 829 {
 830         // Get the actual object
 831         consumer_sdl this = parent->child;
 832
 833         // Stop the consumer
 834         ///mlt_consumer_stop( parent );
 835
 836         // Now clean up the rest
 837         mlt_consumer_close( parent );
 838
 839         // Close the queue
 840         mlt_deque_close( this->queue );
 841
 842         // Destroy mutexes
 843         pthread_mutex_destroy( &this->audio_mutex );
 844         pthread_cond_destroy( &this->audio_cond );
 845
 846         // Finally clean up this
 847         free( this );
 848 }