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_DOUBLEBUF;
 143 #if !defined(__DARWIN__)
 144                 this->sdl_flags |= SDL_RESIZABLE;
 145 #endif
 146                 // Allow thread to be started/stopped
 147                 parent->start = consumer_start;
 148                 parent->stop = consumer_stop;
 149                 parent->is_stopped = consumer_is_stopped;
 150
 151                 // Register specific events
 152                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 153
 154                 // Return the consumer produced
 155                 return parent;
 156         }
 157
 158         // malloc or consumer init failed
 159         free( this );
 160
 161         // Indicate failure
 162         return NULL;
 163 }
 164
 165 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 166 {
 167         if ( listener != NULL )
 168                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 169 }
 170
 171 int consumer_start( mlt_consumer parent )
 172 {
 173         consumer_sdl this = parent->child;
 174
 175         if ( !this->running )
 176         {
 177                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 178                 int video_off = mlt_properties_get_int( properties, "video_off" );
 179                 int preview_off = mlt_properties_get_int( properties, "preview_off" );
 180                 int display_off = video_off | preview_off;
 181                 int audio_off = mlt_properties_get_int( properties, "audio_off" );
 182                 int sdl_started = mlt_properties_get_int( properties, "sdl_started" );
 183
 184                 consumer_stop( parent );
 185
 186                 this->running = 1;
 187                 this->joined = 0;
 188
 189                 if ( ! mlt_properties_get_int( this->properties, "_arg_size" ) )
 190                 {
 191                         if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 192                                 this->width = mlt_properties_get_int( this->properties, "width" );
 193                         if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 194                                 this->height = mlt_properties_get_int( this->properties, "height" );
 195                 }
 196
 197                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 198
 199                 if ( sdl_started == 0 && display_off == 0 )
 200                 {
 201                         pthread_mutex_lock( &mlt_sdl_mutex );
 202                         int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 203                         pthread_mutex_unlock( &mlt_sdl_mutex );
 204                         if ( ret < 0 )
 205                         {
 206                                 mlt_log_error( MLT_CONSUMER_SERVICE(parent), "Failed to initialize SDL: %s\n", SDL_GetError() );
 207                                 return -1;
 208                         }
 209
 210                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 211                         SDL_EnableUNICODE( 1 );
 212                 }
 213                 else if ( display_off == 0 )
 214                 {
 215                         pthread_mutex_lock( &mlt_sdl_mutex );
 216                         this->sdl_screen = SDL_GetVideoSurface( );
 217                         pthread_mutex_unlock( &mlt_sdl_mutex );
 218                 }
 219
 220                 if ( audio_off == 0 )
 221                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 222
 223                 // Default window size
 224                 if ( mlt_properties_get_int( this->properties, "_arg_size" ) )
 225                 {
 226                         this->window_width = this->width;
 227                         this->window_height = this->height;
 228                 }
 229                 else
 230                 {
 231                         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 232                         this->window_width = ( double )this->height * display_ratio + 0.5;
 233                         this->window_height = this->height;
 234                 }
 235
 236                 if ( this->sdl_screen == NULL && display_off == 0 )
 237                 {
 238                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 239                         {
 240                                 const SDL_VideoInfo *vi;
 241                                 pthread_mutex_lock( &mlt_sdl_mutex );
 242                                 vi = SDL_GetVideoInfo();
 243                                 pthread_mutex_unlock( &mlt_sdl_mutex );
 244                                 this->window_width = vi->current_w;
 245                                 this->window_height = vi->current_h;
 246                                 this->sdl_flags |= SDL_FULLSCREEN;
 247                                 SDL_ShowCursor( SDL_DISABLE );
 248                         }
 249                         pthread_mutex_lock( &mlt_sdl_mutex );
 250                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 251                         pthread_mutex_unlock( &mlt_sdl_mutex );
 252                 }
 253
 254                 pthread_create( &this->thread, NULL, consumer_thread, this );
 255         }
 256
 257         return 0;
 258 }
 259
 260 int consumer_stop( mlt_consumer parent )
 261 {
 262         // Get the actual object
 263         consumer_sdl this = parent->child;
 264
 265         if ( this->joined == 0 )
 266         {
 267                 // Kill the thread and clean up
 268                 this->joined = 1;
 269                 this->running = 0;
 270 #ifndef WIN32
 271                 if ( this->thread )
 272 #endif
 273                         pthread_join( this->thread, NULL );
 274
 275                 // internal cleanup
 276                 if ( this->sdl_overlay != NULL )
 277                         SDL_FreeYUVOverlay( this->sdl_overlay );
 278                 this->sdl_overlay = NULL;
 279
 280                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 281                 {
 282                         pthread_mutex_lock( &this->audio_mutex );
 283                         pthread_cond_broadcast( &this->audio_cond );
 284                         pthread_mutex_unlock( &this->audio_mutex );
 285                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 286                 }
 287
 288                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 289                 {
 290                         pthread_mutex_lock( &mlt_sdl_mutex );
 291                         SDL_Quit( );
 292                         pthread_mutex_unlock( &mlt_sdl_mutex );
 293                 }
 294
 295                 this->sdl_screen = NULL;
 296         }
 297
 298         return 0;
 299 }
 300
 301 int consumer_is_stopped( mlt_consumer parent )
 302 {
 303         consumer_sdl this = parent->child;
 304         return !this->running;
 305 }
 306
 307 static int sdl_lock_display( )
 308 {
 309         pthread_mutex_lock( &mlt_sdl_mutex );
 310         SDL_Surface *screen = SDL_GetVideoSurface( );
 311         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 312         pthread_mutex_unlock( &mlt_sdl_mutex );
 313         return result;
 314 }
 315
 316 static void sdl_unlock_display( )
 317 {
 318         pthread_mutex_lock( &mlt_sdl_mutex );
 319         SDL_Surface *screen = SDL_GetVideoSurface( );
 320         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 321                 SDL_UnlockSurface( screen );
 322         pthread_mutex_unlock( &mlt_sdl_mutex );
 323 }
 324
 325 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 326 {
 327         consumer_sdl this = udata;
 328
 329         // Get the volume
 330         double volume = mlt_properties_get_double( this->properties, "volume" );
 331
 332         pthread_mutex_lock( &this->audio_mutex );
 333
 334         // Block until audio received
 335         while ( this->running && len > this->audio_avail )
 336                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 337
 338         if ( this->audio_avail >= len )
 339         {
 340                 // Place in the audio buffer
 341                 if ( volume != 1.0 )
 342                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 343                 else
 344                         memcpy( stream, this->audio_buffer, len );
 345
 346                 // Remove len from the audio available
 347                 this->audio_avail -= len;
 348
 349                 // Remove the samples
 350                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 351         }
 352         else
 353         {
 354                 // Just to be safe, wipe the stream first
 355                 memset( stream, 0, len );
 356
 357                 // Mix the audio
 358                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 359
 360                 // No audio left
 361                 this->audio_avail = 0;
 362         }
 363
 364         // We're definitely playing now
 365         this->playing = 1;
 366
 367         pthread_cond_broadcast( &this->audio_cond );
 368         pthread_mutex_unlock( &this->audio_mutex );
 369 }
 370
 371 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 372 {
 373         // Get the properties of this consumer
 374         mlt_properties properties = this->properties;
 375         mlt_audio_format afmt = mlt_audio_s16;
 376
 377         // Set the preferred params of the test card signal
 378         int channels = mlt_properties_get_int( properties, "channels" );
 379         int dest_channels = channels;
 380         int frequency = mlt_properties_get_int( properties, "frequency" );
 381         static int counter = 0;
 382
 383         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 384
 385         int16_t *pcm;
 386         int bytes;
 387
 388         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 389         *duration = ( ( samples * 1000 ) / frequency );
 390         pcm += mlt_properties_get_int( properties, "audio_offset" );
 391
 392         if ( mlt_properties_get_int( properties, "audio_off" ) )
 393         {
 394                 this->playing = 1;
 395                 init_audio = 1;
 396                 return init_audio;
 397         }
 398
 399         if ( init_audio == 1 )
 400         {
 401                 SDL_AudioSpec request;
 402                 SDL_AudioSpec got;
 403
 404                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 405
 406                 // specify audio format
 407                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 408                 this->playing = 0;
 409                 request.freq = frequency;
 410                 request.format = AUDIO_S16SYS;
 411                 request.channels = dest_channels;
 412                 request.samples = audio_buffer;
 413                 request.callback = sdl_fill_audio;
 414                 request.userdata = (void *)this;
 415                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 416                 {
 417                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 418                         init_audio = 2;
 419                 }
 420                 else if ( got.size != 0 )
 421                 {
 422                         SDL_PauseAudio( 0 );
 423                         init_audio = 0;
 424                 }
 425         }
 426
 427         if ( init_audio == 0 )
 428         {
 429                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 430
 431                 bytes = samples * dest_channels * sizeof(*pcm);
 432                 pthread_mutex_lock( &this->audio_mutex );
 433                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 434                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 435                 if ( this->running )
 436                 {
 437                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 438                         {
 439                                 if ( channels == dest_channels )
 440                                 {
 441                                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 442                                 }
 443                                 else
 444                                 {
 445                                         int16_t *dest = (int16_t*) &this->audio_buffer[ this->audio_avail ];
 446                                         int i = samples + 1;
 447
 448                                         while ( --i )
 449                                         {
 450                                                 memcpy( dest, pcm, dest_channels * sizeof(*pcm) );
 451                                                 pcm += channels;
 452                                                 dest += dest_channels;
 453                                         }
 454                                 }
 455                         }
 456                         else
 457                         {
 458                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 459                         }
 460                         this->audio_avail += bytes;
 461                 }
 462                 pthread_cond_broadcast( &this->audio_cond );
 463                 pthread_mutex_unlock( &this->audio_mutex );
 464         }
 465         else
 466         {
 467                 this->playing = 1;
 468         }
 469
 470         return init_audio;
 471 }
 472
 473 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 474 {
 475         // Get the properties of this consumer
 476         mlt_properties properties = this->properties;
 477
 478         mlt_image_format vfmt = mlt_image_yuv422;
 479         int width = this->width, height = this->height;
 480         uint8_t *image;
 481         int changed = 0;
 482
 483         int video_off = mlt_properties_get_int( properties, "video_off" );
 484         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 485         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 486         int display_off = video_off | preview_off;
 487
 488         if ( this->running && display_off == 0 )
 489         {
 490                 // Get the image, width and height
 491                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 492                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 493
 494                 void *pool = mlt_cocoa_autorelease_init();
 495
 496                 // Handle events
 497                 if ( this->sdl_screen != NULL )
 498                 {
 499                         SDL_Event event;
 500
 501                         sdl_lock_display( );
 502                         pthread_mutex_lock( &mlt_sdl_mutex );
 503                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 504                         pthread_mutex_unlock( &mlt_sdl_mutex );
 505                         sdl_unlock_display( );
 506
 507                         while ( SDL_PollEvent( &event ) )
 508                         {
 509                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 510
 511                                 switch( event.type )
 512                                 {
 513                                         case SDL_VIDEORESIZE:
 514                                                 this->window_width = event.resize.w;
 515                                                 this->window_height = event.resize.h;
 516                                                 changed = 1;
 517                                                 break;
 518                                         case SDL_QUIT:
 519                                                 this->running = 0;
 520                                                 break;
 521                                         case SDL_KEYDOWN:
 522                                                 {
 523                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 524                                                         char keyboard[ 2 ] = " ";
 525                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 526                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 527                                                         {
 528                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 529                                                                 callback( producer, keyboard );
 530                                                         }
 531                                                 }
 532                                                 break;
 533                                 }
 534                         }
 535                 }
 536
 537                 sdl_lock_display();
 538
 539                 if ( width != this->width || height != this->height )
 540                 {
 541                         if ( this->sdl_overlay != NULL )
 542                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 543                         this->sdl_overlay = NULL;
 544                 }
 545
 546                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 547                 {
 548                         // Force an overlay recreation
 549                         if ( this->sdl_overlay != NULL )
 550                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 551                         this->sdl_overlay = NULL;
 552
 553                         // open SDL window with video overlay, if possible
 554                         pthread_mutex_lock( &mlt_sdl_mutex );
 555                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 556                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 557                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 558                         pthread_mutex_unlock( &mlt_sdl_mutex );
 559
 560                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 561                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 562                         SDL_Flip( this->sdl_screen );
 563                 }
 564
 565                 if ( this->running )
 566                 {
 567                         // Determine window's new display aspect ratio
 568                         double this_aspect = ( double )this->window_width / this->window_height;
 569
 570                         // Get the display aspect ratio
 571                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 572
 573                         // Determine frame's display aspect ratio
 574                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 575
 576                         // Store the width and height received
 577                         this->width = width;
 578                         this->height = height;
 579
 580                         // If using hardware scaler
 581                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 582                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 583                         {
 584                                 // Use hardware scaler to normalise display aspect ratio
 585                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 586                                 this->rect.h = this->window_height;
 587                                 if ( this->rect.w > this->window_width )
 588                                 {
 589                                         this->rect.w = this->window_width;
 590                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 591                                 }
 592                         }
 593                         // Special case optimisation to negate odd effect of sample aspect ratio
 594                         // not corresponding exactly with image resolution.
 595                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 596                         {
 597                                 this->rect.w = this->window_width;
 598                                 this->rect.h = this->window_height;
 599                         }
 600                         // Use hardware scaler to normalise sample aspect ratio
 601                         else if ( this->window_height * display_ratio > this->window_width )
 602                         {
 603                                 this->rect.w = this->window_width;
 604                                 this->rect.h = this->window_width / display_ratio;
 605                         }
 606                         else
 607                         {
 608                                 this->rect.w = this->window_height * display_ratio;
 609                                 this->rect.h = this->window_height;
 610                         }
 611
 612                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 613                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 614                         this->rect.x -= this->rect.x % 2;
 615
 616                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 617                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 618                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 619                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 620
 621                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 622                 }
 623
 624                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 625                 {
 626                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 627                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 628                 }
 629
 630                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 631                 {
 632                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 633                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 634                         {
 635                                 if ( image != NULL )
 636                                         memcpy( this->buffer, image, width * height * 2 );
 637                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 638                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 639                         }
 640                 }
 641
 642                 sdl_unlock_display();
 643                 mlt_cocoa_autorelease_close( pool );
 644                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 645         }
 646         else if ( this->running )
 647         {
 648                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 649                 if ( !video_off )
 650                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 651                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 652                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 653         }
 654
 655         return 0;
 656 }
 657
 658 static void *video_thread( void *arg )
 659 {
 660         // Identify the arg
 661         consumer_sdl this = arg;
 662
 663         // Obtain time of thread start
 664         struct timeval now;
 665         int64_t start = 0;
 666         int64_t elapsed = 0;
 667         struct timespec tm;
 668         mlt_frame next = NULL;
 669         mlt_properties properties = NULL;
 670         double speed = 0;
 671
 672         // Get real time flag
 673         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 674
 675         // Get the current time
 676         gettimeofday( &now, NULL );
 677
 678         // Determine start time
 679         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 680
 681         while ( this->running )
 682         {
 683                 // Pop the next frame
 684                 pthread_mutex_lock( &this->video_mutex );
 685                 next = mlt_deque_pop_front( this->queue );
 686                 while ( next == NULL && this->running )
 687                 {
 688                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 689                         next = mlt_deque_pop_front( this->queue );
 690                 }
 691                 pthread_mutex_unlock( &this->video_mutex );
 692
 693                 if ( !this->running || next == NULL ) break;
 694
 695                 // Get the properties
 696                 properties =  MLT_FRAME_PROPERTIES( next );
 697
 698                 // Get the speed of the frame
 699                 speed = mlt_properties_get_double( properties, "_speed" );
 700
 701                 // Get the current time
 702                 gettimeofday( &now, NULL );
 703
 704                 // Get the elapsed time
 705                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 706
 707                 // See if we have to delay the display of the current frame
 708                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 709                 {
 710                         // Obtain the scheduled playout time
 711                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 712
 713                         // Determine the difference between the elapsed time and the scheduled playout time
 714                         int64_t difference = scheduled - elapsed;
 715
 716                         // Smooth playback a bit
 717                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 718                         {
 719                                 tm.tv_sec = difference / 1000000;
 720                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 721                                 nanosleep( &tm, NULL );
 722                         }
 723
 724                         // Show current frame if not too old
 725                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 726                                 consumer_play_video( this, next );
 727
 728                         // If the queue is empty, recalculate start to allow build up again
 729                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 730                         {
 731                                 gettimeofday( &now, NULL );
 732                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 733                         }
 734                 }
 735                 else
 736                 {
 737                         static int dropped = 0;
 738                         mlt_log_info( MLT_CONSUMER_SERVICE(&this->parent), "dropped video frame %d\n", ++dropped );
 739                 }
 740
 741                 // This frame can now be closed
 742                 mlt_frame_close( next );
 743                 next = NULL;
 744         }
 745
 746         if ( next != NULL )
 747                 mlt_frame_close( next );
 748
 749         mlt_consumer_stopped( &this->parent );
 750
 751         return NULL;
 752 }
 753
 754 /** Threaded wrapper for pipe.
 755 */
 756
 757 static void *consumer_thread( void *arg )
 758 {
 759         // Identify the arg
 760         consumer_sdl this = arg;
 761
 762         // Get the consumer
 763         mlt_consumer consumer = &this->parent;
 764
 765         // Convenience functionality
 766         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 767         int terminated = 0;
 768
 769         // Video thread
 770         pthread_t thread;
 771
 772         // internal intialization
 773         int init_audio = 1;
 774         int init_video = 1;
 775         mlt_frame frame = NULL;
 776         mlt_properties properties = NULL;
 777         int duration = 0;
 778         int64_t playtime = 0;
 779         struct timespec tm = { 0, 100000 };
 780
 781         // Loop until told not to
 782         while( !terminated && this->running )
 783         {
 784                 // Get a frame from the attached producer
 785                 frame = mlt_consumer_rt_frame( consumer );
 786
 787                 // Check for termination
 788                 if ( terminate_on_pause && frame != NULL )
 789                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 790
 791                 // Ensure that we have a frame
 792                 if ( frame != NULL )
 793                 {
 794                         // Get the frame properties
 795                         properties =  MLT_FRAME_PROPERTIES( frame );
 796
 797                         // Play audio
 798                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 799
 800                         // Determine the start time now
 801                         if ( this->playing && init_video )
 802                         {
 803                                 // Create the video thread
 804                                 pthread_create( &thread, NULL, video_thread, this );
 805
 806                                 // Video doesn't need to be initialised any more
 807                                 init_video = 0;
 808                         }
 809
 810                         // Set playtime for this frame
 811                         mlt_properties_set_int( properties, "playtime", playtime );
 812
 813                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 814                                 nanosleep( &tm, NULL );
 815
 816                         // Push this frame to the back of the queue
 817                         pthread_mutex_lock( &this->video_mutex );
 818                         mlt_deque_push_back( this->queue, frame );
 819                         pthread_cond_broadcast( &this->video_cond );
 820                         pthread_mutex_unlock( &this->video_mutex );
 821
 822                         // Calculate the next playtime
 823                         playtime += ( duration * 1000 );
 824                 }
 825         }
 826
 827         this->running = 0;
 828
 829         // Kill the video thread
 830         if ( init_video == 0 )
 831         {
 832                 pthread_mutex_lock( &this->video_mutex );
 833                 pthread_cond_broadcast( &this->video_cond );
 834                 pthread_mutex_unlock( &this->video_mutex );
 835                 pthread_join( thread, NULL );
 836         }
 837
 838         while( mlt_deque_count( this->queue ) )
 839                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 840
 841         this->sdl_screen = NULL;
 842         this->audio_avail = 0;
 843
 844         return NULL;
 845 }
 846
 847 static int consumer_get_dimensions( int *width, int *height )
 848 {
 849         int changed = 0;
 850
 851         // SDL windows manager structure
 852         SDL_SysWMinfo wm;
 853
 854         // Specify the SDL Version
 855         SDL_VERSION( &wm.version );
 856
 857         // Lock the display
 858         //sdl_lock_display();
 859
 860 #ifndef __DARWIN__
 861         // Get the wm structure
 862         if ( SDL_GetWMInfo( &wm ) == 1 )
 863         {
 864 #ifndef WIN32
 865                 // Check that we have the X11 wm
 866                 if ( wm.subsystem == SDL_SYSWM_X11 )
 867                 {
 868                         // Get the SDL window
 869                         Window window = wm.info.x11.window;
 870
 871                         // Get the display session
 872                         Display *display = wm.info.x11.display;
 873
 874                         // Get the window attributes
 875                         XWindowAttributes attr;
 876                         XGetWindowAttributes( display, window, &attr );
 877
 878                         // Determine whether window has changed
 879                         changed = *width != attr.width || *height != attr.height;
 880
 881                         // Return width and height
 882                         *width = attr.width;
 883                         *height = attr.height;
 884                 }
 885 #endif
 886         }
 887 #endif
 888
 889         // Unlock the display
 890         //sdl_unlock_display();
 891
 892         return changed;
 893 }
 894
 895 /** Callback to allow override of the close method.
 896 */
 897
 898 static void consumer_close( mlt_consumer parent )
 899 {
 900         // Get the actual object
 901         consumer_sdl this = parent->child;
 902
 903         // Stop the consumer
 904         ///mlt_consumer_stop( parent );
 905
 906         // Now clean up the rest
 907         mlt_consumer_close( parent );
 908
 909         // Close the queue
 910         mlt_deque_close( this->queue );
 911
 912         // Destroy mutexes
 913         pthread_mutex_destroy( &this->audio_mutex );
 914         pthread_cond_destroy( &this->audio_cond );
 915
 916         // Finally clean up this
 917         free( this );
 918 }