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, 2010 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 <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         mlt_deque queue;
  48         pthread_t thread;
  49         int joined;
  50         int running;
  51         uint8_t audio_buffer[ 4096 * 10 ];
  52         int audio_avail;
  53         pthread_mutex_t audio_mutex;
  54         pthread_cond_t audio_cond;
  55         pthread_mutex_t video_mutex;
  56         pthread_cond_t video_cond;
  57         int window_width;
  58         int window_height;
  59         int previous_width;
  60         int previous_height;
  61         int width;
  62         int height;
  63         int playing;
  64         int sdl_flags;
  65         SDL_Surface *sdl_screen;
  66         SDL_Overlay *sdl_overlay;
  67         SDL_Rect rect;
  68         uint8_t *buffer;
  69         int bpp;
  70 };
  71
  72 /** Forward references to static functions.
  73 */
  74
  75 static int consumer_start( mlt_consumer parent );
  76 static int consumer_stop( mlt_consumer parent );
  77 static int consumer_is_stopped( mlt_consumer parent );
  78 static void consumer_close( mlt_consumer parent );
  79 static void *consumer_thread( void * );
  80 static int consumer_get_dimensions( int *width, int *height );
  81 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  82
  83 /** This is what will be called by the factory - anything can be passed in
  84         via the argument, but keep it simple.
  85 */
  86
  87 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  88 {
  89         // Create the consumer object
  90         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  91
  92         // If no malloc'd and consumer init ok
  93         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  94         {
  95                 // Create the queue
  96                 this->queue = mlt_deque_init( );
  97
  98                 // Get the parent consumer object
  99                 mlt_consumer parent = &this->parent;
 100
 101                 // We have stuff to clean up, so override the close method
 102                 parent->close = consumer_close;
 103
 104                 // get a handle on properties
 105                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 106                 this->properties = MLT_SERVICE_PROPERTIES( service );
 107
 108                 // Set the default volume
 109                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 110
 111                 // This is the initialisation of the consumer
 112                 pthread_mutex_init( &this->audio_mutex, NULL );
 113                 pthread_cond_init( &this->audio_cond, NULL);
 114                 pthread_mutex_init( &this->video_mutex, NULL );
 115                 pthread_cond_init( &this->video_cond, NULL);
 116
 117                 // Default scaler (for now we'll use nearest)
 118                 mlt_properties_set( this->properties, "rescale", "nearest" );
 119                 mlt_properties_set( this->properties, "deinterlace_method", "onefield" );
 120
 121                 // Default buffer for low latency
 122                 mlt_properties_set_int( this->properties, "buffer", 1 );
 123
 124                 // Default audio buffer
 125                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 126
 127                 // Ensure we don't join on a non-running object
 128                 this->joined = 1;
 129
 130                 // process actual param
 131                 if ( arg && sscanf( arg, "%dx%d", &this->width, &this->height ) )
 132                 {
 133                         mlt_properties_set_int( this->properties, "_arg_size", 1 );
 134                 }
 135                 else
 136                 {
 137                         this->width = mlt_properties_get_int( this->properties, "width" );
 138                         this->height = mlt_properties_get_int( this->properties, "height" );
 139                 }
 140
 141                 // Set the sdl flags
 142                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 143
 144                 // Allow thread to be started/stopped
 145                 parent->start = consumer_start;
 146                 parent->stop = consumer_stop;
 147                 parent->is_stopped = consumer_is_stopped;
 148
 149                 // Register specific events
 150                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 151
 152                 // Return the consumer produced
 153                 return parent;
 154         }
 155
 156         // malloc or consumer init failed
 157         free( this );
 158
 159         // Indicate failure
 160         return NULL;
 161 }
 162
 163 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 164 {
 165         if ( listener != NULL )
 166                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 167 }
 168
 169 int consumer_start( mlt_consumer parent )
 170 {
 171         consumer_sdl this = parent->child;
 172
 173         if ( !this->running )
 174         {
 175                 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
 176                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 177                 int display_off = video_off | preview_off;
 178                 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
 179                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 180
 181                 consumer_stop( parent );
 182
 183                 this->running = 1;
 184                 this->joined = 0;
 185
 186                 if ( ! mlt_properties_get_int( this->properties, "_arg_size" ) )
 187                 {
 188                         if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 189                                 this->width = mlt_properties_get_int( this->properties, "width" );
 190                         if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 191                                 this->height = mlt_properties_get_int( this->properties, "height" );
 192                 }
 193
 194                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 195
 196                 if ( sdl_started == 0 && display_off == 0 )
 197                 {
 198                         pthread_mutex_lock( &mlt_sdl_mutex );
 199                         int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 200                         pthread_mutex_unlock( &mlt_sdl_mutex );
 201                         if ( ret < 0 )
 202                         {
 203                                 mlt_log_error( MLT_CONSUMER_SERVICE(parent), "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                         pthread_mutex_lock( &mlt_sdl_mutex );
 213                         this->sdl_screen = SDL_GetVideoSurface( );
 214                         pthread_mutex_unlock( &mlt_sdl_mutex );
 215                 }
 216
 217                 if ( audio_off == 0 )
 218                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 219
 220                 // Default window size
 221                 if ( mlt_properties_get_int( this->properties, "_arg_size" ) )
 222                 {
 223                         this->window_width = this->width;
 224                         this->window_height = this->height;
 225                 }
 226                 else
 227                 {
 228                         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 229                         this->window_width = ( double )this->height * display_ratio;
 230                         this->window_height = this->height;
 231                 }
 232
 233                 if ( this->sdl_screen == NULL && display_off == 0 )
 234                 {
 235                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 236                         {
 237                                 const SDL_VideoInfo *vi;
 238                                 pthread_mutex_lock( &mlt_sdl_mutex );
 239                                 vi = SDL_GetVideoInfo();
 240                                 pthread_mutex_unlock( &mlt_sdl_mutex );
 241                                 this->window_width = vi->current_w;
 242                                 this->window_height = vi->current_h;
 243                                 this->sdl_flags |= SDL_FULLSCREEN;
 244                                 SDL_ShowCursor( SDL_DISABLE );
 245                         }
 246                         pthread_mutex_lock( &mlt_sdl_mutex );
 247                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 248                         pthread_mutex_unlock( &mlt_sdl_mutex );
 249                 }
 250
 251                 pthread_create( &this->thread, NULL, consumer_thread, this );
 252         }
 253
 254         return 0;
 255 }
 256
 257 int consumer_stop( mlt_consumer parent )
 258 {
 259         // Get the actual object
 260         consumer_sdl this = parent->child;
 261
 262         if ( this->joined == 0 )
 263         {
 264                 // Kill the thread and clean up
 265                 this->joined = 1;
 266                 this->running = 0;
 267 #ifndef WIN32
 268                 if ( this->thread )
 269 #endif
 270                         pthread_join( this->thread, NULL );
 271
 272                 // internal cleanup
 273                 if ( this->sdl_overlay != NULL )
 274                         SDL_FreeYUVOverlay( this->sdl_overlay );
 275                 this->sdl_overlay = NULL;
 276
 277                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 278                 {
 279                         pthread_mutex_lock( &this->audio_mutex );
 280                         pthread_cond_broadcast( &this->audio_cond );
 281                         pthread_mutex_unlock( &this->audio_mutex );
 282                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 283                 }
 284
 285                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 286                 {
 287                         pthread_mutex_lock( &mlt_sdl_mutex );
 288                         SDL_Quit( );
 289                         pthread_mutex_unlock( &mlt_sdl_mutex );
 290                 }
 291
 292                 this->sdl_screen = NULL;
 293         }
 294
 295         return 0;
 296 }
 297
 298 int consumer_is_stopped( mlt_consumer parent )
 299 {
 300         consumer_sdl this = parent->child;
 301         return !this->running;
 302 }
 303
 304 static int sdl_lock_display( )
 305 {
 306         pthread_mutex_lock( &mlt_sdl_mutex );
 307         SDL_Surface *screen = SDL_GetVideoSurface( );
 308         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 309         pthread_mutex_unlock( &mlt_sdl_mutex );
 310         return result;
 311 }
 312
 313 static void sdl_unlock_display( )
 314 {
 315         pthread_mutex_lock( &mlt_sdl_mutex );
 316         SDL_Surface *screen = SDL_GetVideoSurface( );
 317         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 318                 SDL_UnlockSurface( screen );
 319         pthread_mutex_unlock( &mlt_sdl_mutex );
 320 }
 321
 322 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 323 {
 324         consumer_sdl this = udata;
 325
 326         // Get the volume
 327         double volume = mlt_properties_get_double( this->properties, "volume" );
 328
 329         pthread_mutex_lock( &this->audio_mutex );
 330
 331         // Block until audio received
 332         while ( this->running && len > this->audio_avail )
 333                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 334
 335         if ( this->audio_avail >= len )
 336         {
 337                 // Place in the audio buffer
 338                 if ( volume != 1.0 )
 339                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 340                 else
 341                         memcpy( stream, this->audio_buffer, len );
 342
 343                 // Remove len from the audio available
 344                 this->audio_avail -= len;
 345
 346                 // Remove the samples
 347                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 348         }
 349         else
 350         {
 351                 // Just to be safe, wipe the stream first
 352                 memset( stream, 0, len );
 353
 354                 // Mix the audio
 355                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 356
 357                 // No audio left
 358                 this->audio_avail = 0;
 359         }
 360
 361         // We're definitely playing now
 362         this->playing = 1;
 363
 364         pthread_cond_broadcast( &this->audio_cond );
 365         pthread_mutex_unlock( &this->audio_mutex );
 366 }
 367
 368 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 369 {
 370         // Get the properties of this consumer
 371         mlt_properties properties = this->properties;
 372         mlt_audio_format afmt = mlt_audio_s16;
 373
 374         // Set the preferred params of the test card signal
 375         int channels = mlt_properties_get_int( properties, "channels" );
 376         int dest_channels = channels;
 377         int frequency = mlt_properties_get_int( properties, "frequency" );
 378         static int counter = 0;
 379
 380         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 381
 382         int16_t *pcm;
 383         int bytes;
 384
 385         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 386         *duration = ( ( samples * 1000 ) / frequency );
 387         pcm += mlt_properties_get_int( properties, "audio_offset" );
 388
 389         if ( mlt_properties_get_int( properties, "audio_off" ) )
 390         {
 391                 this->playing = 1;
 392                 init_audio = 1;
 393                 return init_audio;
 394         }
 395
 396         if ( init_audio == 1 )
 397         {
 398                 SDL_AudioSpec request;
 399                 SDL_AudioSpec got;
 400
 401                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 402
 403                 // specify audio format
 404                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 405                 this->playing = 0;
 406                 request.freq = frequency;
 407                 request.format = AUDIO_S16SYS;
 408                 request.channels = dest_channels;
 409                 request.samples = audio_buffer;
 410                 request.callback = sdl_fill_audio;
 411                 request.userdata = (void *)this;
 412                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 413                 {
 414                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 415                         init_audio = 2;
 416                 }
 417                 else if ( got.size != 0 )
 418                 {
 419                         SDL_PauseAudio( 0 );
 420                         init_audio = 0;
 421                 }
 422         }
 423
 424         if ( init_audio == 0 )
 425         {
 426                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 427
 428                 bytes = samples * dest_channels * sizeof(*pcm);
 429                 pthread_mutex_lock( &this->audio_mutex );
 430                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 431                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 432                 if ( this->running )
 433                 {
 434                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 435                         {
 436                                 if ( channels == dest_channels )
 437                                 {
 438                                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 439                                 }
 440                                 else
 441                                 {
 442                                         int16_t *dest = (int16_t*) &this->audio_buffer[ this->audio_avail ];
 443                                         int i = samples + 1;
 444
 445                                         while ( --i )
 446                                         {
 447                                                 memcpy( dest, pcm, dest_channels * sizeof(*pcm) );
 448                                                 pcm += channels;
 449                                                 dest += dest_channels;
 450                                         }
 451                                 }
 452                         }
 453                         else
 454                         {
 455                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 456                         }
 457                         this->audio_avail += bytes;
 458                 }
 459                 pthread_cond_broadcast( &this->audio_cond );
 460                 pthread_mutex_unlock( &this->audio_mutex );
 461         }
 462         else
 463         {
 464                 this->playing = 1;
 465         }
 466
 467         return init_audio;
 468 }
 469
 470 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 471 {
 472         // Get the properties of this consumer
 473         mlt_properties properties = this->properties;
 474
 475         mlt_image_format vfmt = mlt_image_yuv422;
 476         int width = this->width, height = this->height;
 477         uint8_t *image;
 478         int changed = 0;
 479
 480         int video_off = mlt_properties_get_int( properties, "video_off" );
 481         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 482         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 483         int display_off = video_off | preview_off;
 484
 485         if ( this->running && display_off == 0 )
 486         {
 487                 // Get the image, width and height
 488                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 489                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 490
 491                 void *pool = mlt_cocoa_autorelease_init();
 492
 493                 // Handle events
 494                 if ( this->sdl_screen != NULL )
 495                 {
 496                         SDL_Event event;
 497
 498                         sdl_lock_display( );
 499                         pthread_mutex_lock( &mlt_sdl_mutex );
 500                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 501                         pthread_mutex_unlock( &mlt_sdl_mutex );
 502                         sdl_unlock_display( );
 503
 504                         while ( SDL_PollEvent( &event ) )
 505                         {
 506                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 507
 508                                 switch( event.type )
 509                                 {
 510                                         case SDL_VIDEORESIZE:
 511                                                 this->window_width = event.resize.w;
 512                                                 this->window_height = event.resize.h;
 513                                                 changed = 1;
 514                                                 break;
 515                                         case SDL_QUIT:
 516                                                 this->running = 0;
 517                                                 break;
 518                                         case SDL_KEYDOWN:
 519                                                 {
 520                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 521                                                         char keyboard[ 2 ] = " ";
 522                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 523                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 524                                                         {
 525                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 526                                                                 callback( producer, keyboard );
 527                                                         }
 528                                                 }
 529                                                 break;
 530                                 }
 531                         }
 532                 }
 533
 534                 sdl_lock_display();
 535
 536                 if ( width != this->width || height != this->height )
 537                 {
 538                         if ( this->sdl_overlay != NULL )
 539                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 540                         this->sdl_overlay = NULL;
 541                 }
 542
 543                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 544                 {
 545                         // Force an overlay recreation
 546                         if ( this->sdl_overlay != NULL )
 547                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 548                         this->sdl_overlay = NULL;
 549
 550                         // open SDL window with video overlay, if possible
 551                         pthread_mutex_lock( &mlt_sdl_mutex );
 552                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 553                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 554                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 555                         pthread_mutex_unlock( &mlt_sdl_mutex );
 556
 557                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 558                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 559                         SDL_Flip( this->sdl_screen );
 560                 }
 561
 562                 if ( this->running )
 563                 {
 564                         // Determine window's new display aspect ratio
 565                         double this_aspect = ( double )this->window_width / this->window_height;
 566
 567                         // Get the display aspect ratio
 568                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 569
 570                         // Determine frame's display aspect ratio
 571                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 572
 573                         // Store the width and height received
 574                         this->width = width;
 575                         this->height = height;
 576
 577                         // If using hardware scaler
 578                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 579                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 580                         {
 581                                 // Use hardware scaler to normalise display aspect ratio
 582                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 583                                 this->rect.h = this->window_height;
 584                                 if ( this->rect.w > this->window_width )
 585                                 {
 586                                         this->rect.w = this->window_width;
 587                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 588                                 }
 589                         }
 590                         // Special case optimisation to negate odd effect of sample aspect ratio
 591                         // not corresponding exactly with image resolution.
 592                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 593                         {
 594                                 this->rect.w = this->window_width;
 595                                 this->rect.h = this->window_height;
 596                         }
 597                         // Use hardware scaler to normalise sample aspect ratio
 598                         else if ( this->window_height * display_ratio > this->window_width )
 599                         {
 600                                 this->rect.w = this->window_width;
 601                                 this->rect.h = this->window_width / display_ratio;
 602                         }
 603                         else
 604                         {
 605                                 this->rect.w = this->window_height * display_ratio;
 606                                 this->rect.h = this->window_height;
 607                         }
 608
 609                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 610                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 611                         this->rect.x -= this->rect.x % 2;
 612
 613                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 614                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 615                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 616                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 617
 618                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 619                 }
 620
 621                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 622                 {
 623                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 624                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 625                 }
 626
 627                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 628                 {
 629                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 630                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 631                         {
 632                                 if ( image != NULL )
 633                                         memcpy( this->buffer, image, width * height * 2 );
 634                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 635                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 636                         }
 637                 }
 638
 639                 sdl_unlock_display();
 640                 mlt_cocoa_autorelease_close( pool );
 641                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 642         }
 643         else if ( this->running )
 644         {
 645                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 646                 if ( !video_off )
 647                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 648                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 649                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 650         }
 651
 652         return 0;
 653 }
 654
 655 static void *video_thread( void *arg )
 656 {
 657         // Identify the arg
 658         consumer_sdl this = arg;
 659
 660         // Obtain time of thread start
 661         struct timeval now;
 662         int64_t start = 0;
 663         int64_t elapsed = 0;
 664         struct timespec tm;
 665         mlt_frame next = NULL;
 666         mlt_properties properties = NULL;
 667         double speed = 0;
 668
 669         // Get real time flag
 670         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 671
 672         // Get the current time
 673         gettimeofday( &now, NULL );
 674
 675         // Determine start time
 676         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 677
 678         while ( this->running )
 679         {
 680                 // Pop the next frame
 681                 pthread_mutex_lock( &this->video_mutex );
 682                 next = mlt_deque_pop_front( this->queue );
 683                 while ( next == NULL && this->running )
 684                 {
 685                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 686                         next = mlt_deque_pop_front( this->queue );
 687                 }
 688                 pthread_mutex_unlock( &this->video_mutex );
 689
 690                 if ( !this->running || next == NULL ) break;
 691
 692                 // Get the properties
 693                 properties =  MLT_FRAME_PROPERTIES( next );
 694
 695                 // Get the speed of the frame
 696                 speed = mlt_properties_get_double( properties, "_speed" );
 697
 698                 // Get the current time
 699                 gettimeofday( &now, NULL );
 700
 701                 // Get the elapsed time
 702                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 703
 704                 // See if we have to delay the display of the current frame
 705                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 706                 {
 707                         // Obtain the scheduled playout time
 708                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 709
 710                         // Determine the difference between the elapsed time and the scheduled playout time
 711                         int64_t difference = scheduled - elapsed;
 712
 713                         // Smooth playback a bit
 714                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 715                         {
 716                                 tm.tv_sec = difference / 1000000;
 717                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 718                                 nanosleep( &tm, NULL );
 719                         }
 720
 721                         // Show current frame if not too old
 722                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 723                                 consumer_play_video( this, next );
 724
 725                         // If the queue is empty, recalculate start to allow build up again
 726                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 727                         {
 728                                 gettimeofday( &now, NULL );
 729                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 730                         }
 731                 }
 732                 else
 733                 {
 734                         mlt_log_debug( MLT_CONSUMER_SERVICE(&this->parent), "dropped video frame\n" );
 735                 }
 736
 737                 // This frame can now be closed
 738                 mlt_frame_close( next );
 739                 next = NULL;
 740         }
 741
 742         if ( next != NULL )
 743                 mlt_frame_close( next );
 744
 745         mlt_consumer_stopped( &this->parent );
 746
 747         return NULL;
 748 }
 749
 750 /** Threaded wrapper for pipe.
 751 */
 752
 753 static void *consumer_thread( void *arg )
 754 {
 755         // Identify the arg
 756         consumer_sdl this = arg;
 757
 758         // Get the consumer
 759         mlt_consumer consumer = &this->parent;
 760
 761         // Convenience functionality
 762         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 763         int terminated = 0;
 764
 765         // Video thread
 766         pthread_t thread;
 767
 768         // internal intialization
 769         int init_audio = 1;
 770         int init_video = 1;
 771         mlt_frame frame = NULL;
 772         mlt_properties properties = NULL;
 773         int duration = 0;
 774         int64_t playtime = 0;
 775         struct timespec tm = { 0, 100000 };
 776
 777         // Loop until told not to
 778         while( !terminated && this->running )
 779         {
 780                 // Get a frame from the attached producer
 781                 frame = mlt_consumer_rt_frame( consumer );
 782
 783                 // Check for termination
 784                 if ( terminate_on_pause && frame != NULL )
 785                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 786
 787                 // Ensure that we have a frame
 788                 if ( frame != NULL )
 789                 {
 790                         // Get the frame properties
 791                         properties =  MLT_FRAME_PROPERTIES( frame );
 792
 793                         // Play audio
 794                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 795
 796                         // Determine the start time now
 797                         if ( this->playing && init_video )
 798                         {
 799                                 // Create the video thread
 800                                 pthread_create( &thread, NULL, video_thread, this );
 801
 802                                 // Video doesn't need to be initialised any more
 803                                 init_video = 0;
 804                         }
 805
 806                         // Set playtime for this frame
 807                         mlt_properties_set_int( properties, "playtime", playtime );
 808
 809                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 810                                 nanosleep( &tm, NULL );
 811
 812                         // Push this frame to the back of the queue
 813                         pthread_mutex_lock( &this->video_mutex );
 814                         mlt_deque_push_back( this->queue, frame );
 815                         pthread_cond_broadcast( &this->video_cond );
 816                         pthread_mutex_unlock( &this->video_mutex );
 817
 818                         // Calculate the next playtime
 819                         playtime += ( duration * 1000 );
 820                 }
 821         }
 822
 823         this->running = 0;
 824
 825         // Kill the video thread
 826         if ( init_video == 0 )
 827         {
 828                 pthread_mutex_lock( &this->video_mutex );
 829                 pthread_cond_broadcast( &this->video_cond );
 830                 pthread_mutex_unlock( &this->video_mutex );
 831                 pthread_join( thread, NULL );
 832         }
 833
 834         while( mlt_deque_count( this->queue ) )
 835                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 836
 837         this->sdl_screen = NULL;
 838         this->audio_avail = 0;
 839
 840         return NULL;
 841 }
 842
 843 static int consumer_get_dimensions( int *width, int *height )
 844 {
 845         int changed = 0;
 846
 847         // SDL windows manager structure
 848         SDL_SysWMinfo wm;
 849
 850         // Specify the SDL Version
 851         SDL_VERSION( &wm.version );
 852
 853         // Lock the display
 854         //sdl_lock_display();
 855
 856 #ifndef __DARWIN__
 857         // Get the wm structure
 858         if ( SDL_GetWMInfo( &wm ) == 1 )
 859         {
 860 #ifndef WIN32
 861                 // Check that we have the X11 wm
 862                 if ( wm.subsystem == SDL_SYSWM_X11 )
 863                 {
 864                         // Get the SDL window
 865                         Window window = wm.info.x11.window;
 866
 867                         // Get the display session
 868                         Display *display = wm.info.x11.display;
 869
 870                         // Get the window attributes
 871                         XWindowAttributes attr;
 872                         XGetWindowAttributes( display, window, &attr );
 873
 874                         // Determine whether window has changed
 875                         changed = *width != attr.width || *height != attr.height;
 876
 877                         // Return width and height
 878                         *width = attr.width;
 879                         *height = attr.height;
 880                 }
 881 #endif
 882         }
 883 #endif
 884
 885         // Unlock the display
 886         //sdl_unlock_display();
 887
 888         return changed;
 889 }
 890
 891 /** Callback to allow override of the close method.
 892 */
 893
 894 static void consumer_close( mlt_consumer parent )
 895 {
 896         // Get the actual object
 897         consumer_sdl this = parent->child;
 898
 899         // Stop the consumer
 900         ///mlt_consumer_stop( parent );
 901
 902         // Now clean up the rest
 903         mlt_consumer_close( parent );
 904
 905         // Close the queue
 906         mlt_deque_close( this->queue );
 907
 908         // Destroy mutexes
 909         pthread_mutex_destroy( &this->audio_mutex );
 910         pthread_cond_destroy( &this->audio_cond );
 911
 912         // Finally clean up this
 913         free( this );
 914 }