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_Overlay *sdl_overlay;
  66         SDL_Rect rect;
  67         uint8_t *buffer;
  68         int bpp;
  69         int is_purge;
  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_purge( mlt_consumer parent );
  79 static void consumer_close( mlt_consumer parent );
  80 static void *consumer_thread( void * );
  81 static int consumer_get_dimensions( int *width, int *height );
  82 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service self, void **args );
  83
  84 /** This is what will be called by the factory - anything can be passed in
  85         via the argument, but keep it simple.
  86 */
  87
  88 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  89 {
  90         // Create the consumer object
  91         consumer_sdl self = calloc( 1, sizeof( struct consumer_sdl_s ) );
  92
  93         // If no malloc'd and consumer init ok
  94         if ( self != NULL && mlt_consumer_init( &self->parent, self, profile ) == 0 )
  95         {
  96                 // Create the queue
  97                 self->queue = mlt_deque_init( );
  98
  99                 // Get the parent consumer object
 100                 mlt_consumer parent = &self->parent;
 101
 102                 // We have stuff to clean up, so override the close method
 103                 parent->close = consumer_close;
 104
 105                 // get a handle on properties
 106                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 107                 self->properties = MLT_SERVICE_PROPERTIES( service );
 108
 109                 // Set the default volume
 110                 mlt_properties_set_double( self->properties, "volume", 1.0 );
 111
 112                 // This is the initialisation of the consumer
 113                 pthread_mutex_init( &self->audio_mutex, NULL );
 114                 pthread_cond_init( &self->audio_cond, NULL);
 115                 pthread_mutex_init( &self->video_mutex, NULL );
 116                 pthread_cond_init( &self->video_cond, NULL);
 117
 118                 // Default scaler (for now we'll use nearest)
 119                 mlt_properties_set( self->properties, "rescale", "nearest" );
 120                 mlt_properties_set( self->properties, "deinterlace_method", "onefield" );
 121                 mlt_properties_set_int( self->properties, "top_field_first", -1 );
 122
 123                 // Default buffer for low latency
 124                 mlt_properties_set_int( self->properties, "buffer", 1 );
 125
 126                 // Default audio buffer
 127                 mlt_properties_set_int( self->properties, "audio_buffer", 2048 );
 128
 129                 // Ensure we don't join on a non-running object
 130                 self->joined = 1;
 131
 132                 // process actual param
 133                 if ( arg && sscanf( arg, "%dx%d", &self->width, &self->height ) )
 134                 {
 135                         mlt_properties_set_int( self->properties, "_arg_size", 1 );
 136                 }
 137                 else
 138                 {
 139                         self->width = mlt_properties_get_int( self->properties, "width" );
 140                         self->height = mlt_properties_get_int( self->properties, "height" );
 141                 }
 142
 143                 // Set the sdl flags
 144                 self->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_DOUBLEBUF;
 145 #if !defined(__DARWIN__)
 146                 self->sdl_flags |= SDL_RESIZABLE;
 147 #endif
 148                 // Allow thread to be started/stopped
 149                 parent->start = consumer_start;
 150                 parent->stop = consumer_stop;
 151                 parent->is_stopped = consumer_is_stopped;
 152                 parent->purge = consumer_purge;
 153
 154                 // Register specific events
 155                 mlt_events_register( self->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 156
 157                 // Return the consumer produced
 158                 return parent;
 159         }
 160
 161         // malloc or consumer init failed
 162         free( self );
 163
 164         // Indicate failure
 165         return NULL;
 166 }
 167
 168 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service self, void **args )
 169 {
 170         if ( listener != NULL )
 171                 listener( owner, self, ( SDL_Event * )args[ 0 ] );
 172 }
 173
 174 int consumer_start( mlt_consumer parent )
 175 {
 176         consumer_sdl self = parent->child;
 177
 178         if ( !self->running )
 179         {
 180                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 181                 int video_off = mlt_properties_get_int( properties, "video_off" );
 182                 int preview_off = mlt_properties_get_int( properties, "preview_off" );
 183                 int display_off = video_off | preview_off;
 184                 int audio_off = mlt_properties_get_int( properties, "audio_off" );
 185                 int sdl_started = mlt_properties_get_int( properties, "sdl_started" );
 186                 char *output_display = mlt_properties_get( properties, "output_display" );
 187                 char *window_id = mlt_properties_get( properties, "window_id" );
 188                 char *audio_driver = mlt_properties_get( properties, "audio_driver" );
 189                 char *video_driver = mlt_properties_get( properties, "video_driver" );
 190                 char *audio_device = mlt_properties_get( properties, "audio_device" );
 191
 192                 consumer_stop( parent );
 193
 194                 self->running = 1;
 195                 self->joined = 0;
 196
 197                 if ( output_display != NULL )
 198                         setenv( "DISPLAY", output_display, 1 );
 199
 200                 if ( window_id != NULL )
 201                         setenv( "SDL_WINDOWID", window_id, 1 );
 202
 203                 if ( video_driver != NULL )
 204                         setenv( "SDL_VIDEODRIVER", video_driver, 1 );
 205
 206                 if ( audio_driver != NULL )
 207                         setenv( "SDL_AUDIODRIVER", audio_driver, 1 );
 208
 209                 if ( audio_device != NULL )
 210                         setenv( "AUDIODEV", audio_device, 1 );
 211
 212                 if ( ! mlt_properties_get_int( self->properties, "_arg_size" ) )
 213                 {
 214                         if ( mlt_properties_get_int( self->properties, "width" ) > 0 )
 215                                 self->width = mlt_properties_get_int( self->properties, "width" );
 216                         if ( mlt_properties_get_int( self->properties, "height" ) > 0 )
 217                                 self->height = mlt_properties_get_int( self->properties, "height" );
 218                 }
 219
 220                 self->bpp = mlt_properties_get_int( self->properties, "bpp" );
 221
 222                 if ( sdl_started == 0 && display_off == 0 )
 223                 {
 224                         pthread_mutex_lock( &mlt_sdl_mutex );
 225                         int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 226                         pthread_mutex_unlock( &mlt_sdl_mutex );
 227                         if ( ret < 0 )
 228                         {
 229                                 mlt_log_error( MLT_CONSUMER_SERVICE(parent), "Failed to initialize SDL: %s\n", SDL_GetError() );
 230                                 return -1;
 231                         }
 232
 233                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 234                         SDL_EnableUNICODE( 1 );
 235                 }
 236
 237                 if ( audio_off == 0 )
 238                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 239
 240                 // Default window size
 241                 if ( mlt_properties_get_int( self->properties, "_arg_size" ) )
 242                 {
 243                         self->window_width = self->width;
 244                         self->window_height = self->height;
 245                 }
 246                 else
 247                 {
 248                         double display_ratio = mlt_properties_get_double( self->properties, "display_ratio" );
 249                         self->window_width = ( double )self->height * display_ratio + 0.5;
 250                         self->window_height = self->height;
 251                 }
 252
 253                 pthread_mutex_lock( &mlt_sdl_mutex );
 254                 if ( !SDL_GetVideoSurface() && display_off == 0 )
 255                 {
 256                         if ( mlt_properties_get_int( self->properties, "fullscreen" ) )
 257                         {
 258                                 const SDL_VideoInfo *vi;
 259                                 vi = SDL_GetVideoInfo();
 260                                 self->window_width = vi->current_w;
 261                                 self->window_height = vi->current_h;
 262                                 self->sdl_flags |= SDL_FULLSCREEN;
 263                                 SDL_ShowCursor( SDL_DISABLE );
 264                         }
 265                         SDL_SetVideoMode( self->window_width, self->window_height, 0, self->sdl_flags );
 266                 }
 267                 pthread_mutex_unlock( &mlt_sdl_mutex );
 268
 269                 pthread_create( &self->thread, NULL, consumer_thread, self );
 270         }
 271
 272         return 0;
 273 }
 274
 275 int consumer_stop( mlt_consumer parent )
 276 {
 277         // Get the actual object
 278         consumer_sdl self = parent->child;
 279
 280         if ( self->joined == 0 )
 281         {
 282                 // Kill the thread and clean up
 283                 self->joined = 1;
 284                 self->running = 0;
 285 #ifndef WIN32
 286                 if ( self->thread )
 287 #endif
 288                         pthread_join( self->thread, NULL );
 289
 290                 // internal cleanup
 291                 if ( self->sdl_overlay != NULL )
 292                         SDL_FreeYUVOverlay( self->sdl_overlay );
 293                 self->sdl_overlay = NULL;
 294
 295                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 296                 {
 297                         pthread_mutex_lock( &self->audio_mutex );
 298                         pthread_cond_broadcast( &self->audio_cond );
 299                         pthread_mutex_unlock( &self->audio_mutex );
 300                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 301                 }
 302
 303                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 304                 {
 305                         pthread_mutex_lock( &mlt_sdl_mutex );
 306                         SDL_Quit( );
 307                         pthread_mutex_unlock( &mlt_sdl_mutex );
 308                 }
 309         }
 310
 311         return 0;
 312 }
 313
 314 int consumer_is_stopped( mlt_consumer parent )
 315 {
 316         consumer_sdl self = parent->child;
 317         return !self->running;
 318 }
 319
 320 void consumer_purge( mlt_consumer parent )
 321 {
 322         consumer_sdl self = parent->child;
 323         if ( self->running )
 324         {
 325                 pthread_mutex_lock( &self->video_mutex );
 326                 while ( mlt_deque_count( self->queue ) )
 327                         mlt_frame_close( mlt_deque_pop_back( self->queue ) );
 328                 self->is_purge = 1;
 329                 pthread_cond_broadcast( &self->video_cond );
 330                 pthread_mutex_unlock( &self->video_mutex );
 331         }
 332 }
 333
 334 static int sdl_lock_display( )
 335 {
 336         pthread_mutex_lock( &mlt_sdl_mutex );
 337         SDL_Surface *screen = SDL_GetVideoSurface( );
 338         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 339         pthread_mutex_unlock( &mlt_sdl_mutex );
 340         return result;
 341 }
 342
 343 static void sdl_unlock_display( )
 344 {
 345         pthread_mutex_lock( &mlt_sdl_mutex );
 346         SDL_Surface *screen = SDL_GetVideoSurface( );
 347         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 348                 SDL_UnlockSurface( screen );
 349         pthread_mutex_unlock( &mlt_sdl_mutex );
 350 }
 351
 352 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 353 {
 354         consumer_sdl self = udata;
 355
 356         // Get the volume
 357         double volume = mlt_properties_get_double( self->properties, "volume" );
 358
 359         pthread_mutex_lock( &self->audio_mutex );
 360
 361         // Block until audio received
 362         while ( self->running && len > self->audio_avail )
 363                 pthread_cond_wait( &self->audio_cond, &self->audio_mutex );
 364
 365         if ( self->audio_avail >= len )
 366         {
 367                 // Place in the audio buffer
 368                 if ( volume != 1.0 )
 369                         SDL_MixAudio( stream, self->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 370                 else
 371                         memcpy( stream, self->audio_buffer, len );
 372
 373                 // Remove len from the audio available
 374                 self->audio_avail -= len;
 375
 376                 // Remove the samples
 377                 memmove( self->audio_buffer, self->audio_buffer + len, self->audio_avail );
 378         }
 379         else
 380         {
 381                 // Just to be safe, wipe the stream first
 382                 memset( stream, 0, len );
 383
 384                 // Mix the audio
 385                 SDL_MixAudio( stream, self->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 386
 387                 // No audio left
 388                 self->audio_avail = 0;
 389         }
 390
 391         // We're definitely playing now
 392         self->playing = 1;
 393
 394         pthread_cond_broadcast( &self->audio_cond );
 395         pthread_mutex_unlock( &self->audio_mutex );
 396 }
 397
 398 static int consumer_play_audio( consumer_sdl self, mlt_frame frame, int init_audio, int *duration )
 399 {
 400         // Get the properties of self consumer
 401         mlt_properties properties = self->properties;
 402         mlt_audio_format afmt = mlt_audio_s16;
 403
 404         // Set the preferred params of the test card signal
 405         int channels = mlt_properties_get_int( properties, "channels" );
 406         int dest_channels = channels;
 407         int frequency = mlt_properties_get_int( properties, "frequency" );
 408         static int counter = 0;
 409
 410         int samples = mlt_sample_calculator( mlt_properties_get_double( self->properties, "fps" ), frequency, counter++ );
 411
 412         int16_t *pcm;
 413         int bytes;
 414
 415         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 416         *duration = ( ( samples * 1000 ) / frequency );
 417         pcm += mlt_properties_get_int( properties, "audio_offset" );
 418
 419         if ( mlt_properties_get_int( properties, "audio_off" ) )
 420         {
 421                 self->playing = 1;
 422                 init_audio = 1;
 423                 return init_audio;
 424         }
 425
 426         if ( init_audio == 1 )
 427         {
 428                 SDL_AudioSpec request;
 429                 SDL_AudioSpec got;
 430
 431                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 432
 433                 // specify audio format
 434                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 435                 self->playing = 0;
 436                 request.freq = frequency;
 437                 request.format = AUDIO_S16SYS;
 438                 request.channels = dest_channels;
 439                 request.samples = audio_buffer;
 440                 request.callback = sdl_fill_audio;
 441                 request.userdata = (void *)self;
 442                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 443                 {
 444                         mlt_log_error( MLT_CONSUMER_SERVICE( self ), "SDL failed to open audio: %s\n", SDL_GetError() );
 445                         init_audio = 2;
 446                 }
 447                 else if ( got.size != 0 )
 448                 {
 449                         SDL_PauseAudio( 0 );
 450                         init_audio = 0;
 451                 }
 452         }
 453
 454         if ( init_audio == 0 )
 455         {
 456                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 457
 458                 bytes = samples * dest_channels * sizeof(*pcm);
 459                 pthread_mutex_lock( &self->audio_mutex );
 460                 while ( self->running && bytes > ( sizeof( self->audio_buffer) - self->audio_avail ) )
 461                         pthread_cond_wait( &self->audio_cond, &self->audio_mutex );
 462                 if ( self->running )
 463                 {
 464                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 465                         {
 466                                 if ( channels == dest_channels )
 467                                 {
 468                                         memcpy( &self->audio_buffer[ self->audio_avail ], pcm, bytes );
 469                                 }
 470                                 else
 471                                 {
 472                                         int16_t *dest = (int16_t*) &self->audio_buffer[ self->audio_avail ];
 473                                         int i = samples + 1;
 474
 475                                         while ( --i )
 476                                         {
 477                                                 memcpy( dest, pcm, dest_channels * sizeof(*pcm) );
 478                                                 pcm += channels;
 479                                                 dest += dest_channels;
 480                                         }
 481                                 }
 482                         }
 483                         else
 484                         {
 485                                 memset( &self->audio_buffer[ self->audio_avail ], 0, bytes );
 486                         }
 487                         self->audio_avail += bytes;
 488                 }
 489                 pthread_cond_broadcast( &self->audio_cond );
 490                 pthread_mutex_unlock( &self->audio_mutex );
 491         }
 492         else
 493         {
 494                 self->playing = 1;
 495         }
 496
 497         return init_audio;
 498 }
 499
 500 static int consumer_play_video( consumer_sdl self, mlt_frame frame )
 501 {
 502         // Get the properties of this consumer
 503         mlt_properties properties = self->properties;
 504
 505         mlt_image_format vfmt = mlt_image_yuv422;
 506         int width = self->width, height = self->height;
 507         uint8_t *image;
 508         int changed = 0;
 509
 510         int video_off = mlt_properties_get_int( properties, "video_off" );
 511         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 512         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 513         int display_off = video_off | preview_off;
 514
 515         if ( self->running && display_off == 0 )
 516         {
 517                 // Get the image, width and height
 518                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 519
 520                 void *pool = mlt_cocoa_autorelease_init();
 521
 522                 // Handle events
 523                 if ( SDL_GetVideoSurface() )
 524                 {
 525                         SDL_Event event;
 526
 527                         sdl_lock_display( );
 528                         pthread_mutex_lock( &mlt_sdl_mutex );
 529                         changed = consumer_get_dimensions( &self->window_width, &self->window_height );
 530                         pthread_mutex_unlock( &mlt_sdl_mutex );
 531                         sdl_unlock_display( );
 532
 533                         while ( SDL_PollEvent( &event ) )
 534                         {
 535                                 mlt_events_fire( self->properties, "consumer-sdl-event", &event, NULL );
 536
 537                                 switch( event.type )
 538                                 {
 539                                         case SDL_VIDEORESIZE:
 540                                                 self->window_width = event.resize.w;
 541                                                 self->window_height = event.resize.h;
 542                                                 changed = 1;
 543                                                 break;
 544                                         case SDL_QUIT:
 545                                                 self->running = 0;
 546                                                 break;
 547                                         case SDL_KEYDOWN:
 548                                                 {
 549                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 550                                                         char keyboard[ 2 ] = " ";
 551                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 552                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 553                                                         {
 554                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 555                                                                 callback( producer, keyboard );
 556                                                         }
 557                                                 }
 558                                                 break;
 559                                 }
 560                         }
 561                 }
 562
 563                 sdl_lock_display();
 564
 565                 if ( width != self->width || height != self->height )
 566                 {
 567                         if ( self->sdl_overlay != NULL )
 568                                 SDL_FreeYUVOverlay( self->sdl_overlay );
 569                         self->sdl_overlay = NULL;
 570                 }
 571
 572                 if ( self->running && ( !SDL_GetVideoSurface() || changed ) )
 573                 {
 574                         // Force an overlay recreation
 575                         if ( self->sdl_overlay != NULL )
 576                                 SDL_FreeYUVOverlay( self->sdl_overlay );
 577                         self->sdl_overlay = NULL;
 578
 579                         // open SDL window with video overlay, if possible
 580                         pthread_mutex_lock( &mlt_sdl_mutex );
 581                         SDL_Surface *screen = SDL_SetVideoMode( self->window_width, self->window_height, self->bpp, self->sdl_flags );
 582                         if ( consumer_get_dimensions( &self->window_width, &self->window_height ) )
 583                                 screen = SDL_SetVideoMode( self->window_width, self->window_height, self->bpp, self->sdl_flags );
 584                         pthread_mutex_unlock( &mlt_sdl_mutex );
 585
 586                         if ( screen )
 587                         {
 588                                 uint32_t color = mlt_properties_get_int( self->properties, "window_background" );
 589                                 SDL_FillRect( screen, NULL, color >> 8 );
 590                                 SDL_Flip( screen );
 591                         }
 592                 }
 593
 594                 if ( self->running )
 595                 {
 596                         // Determine window's new display aspect ratio
 597                         double this_aspect = ( double )self->window_width / self->window_height;
 598
 599                         // Get the display aspect ratio
 600                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 601
 602                         // Determine frame's display aspect ratio
 603                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 604
 605                         // Store the width and height received
 606                         self->width = width;
 607                         self->height = height;
 608
 609                         // If using hardware scaler
 610                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 611                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 612                         {
 613                                 // Use hardware scaler to normalise display aspect ratio
 614                                 self->rect.w = frame_aspect / this_aspect * self->window_width;
 615                                 self->rect.h = self->window_height;
 616                                 if ( self->rect.w > self->window_width )
 617                                 {
 618                                         self->rect.w = self->window_width;
 619                                         self->rect.h = this_aspect / frame_aspect * self->window_height;
 620                                 }
 621                         }
 622                         // Special case optimisation to negate odd effect of sample aspect ratio
 623                         // not corresponding exactly with image resolution.
 624                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 625                         {
 626                                 self->rect.w = self->window_width;
 627                                 self->rect.h = self->window_height;
 628                         }
 629                         // Use hardware scaler to normalise sample aspect ratio
 630                         else if ( self->window_height * display_ratio > self->window_width )
 631                         {
 632                                 self->rect.w = self->window_width;
 633                                 self->rect.h = self->window_width / display_ratio;
 634                         }
 635                         else
 636                         {
 637                                 self->rect.w = self->window_height * display_ratio;
 638                                 self->rect.h = self->window_height;
 639                         }
 640
 641                         self->rect.x = ( self->window_width - self->rect.w ) / 2;
 642                         self->rect.y = ( self->window_height - self->rect.h ) / 2;
 643                         self->rect.x -= self->rect.x % 2;
 644
 645                         mlt_properties_set_int( self->properties, "rect_x", self->rect.x );
 646                         mlt_properties_set_int( self->properties, "rect_y", self->rect.y );
 647                         mlt_properties_set_int( self->properties, "rect_w", self->rect.w );
 648                         mlt_properties_set_int( self->properties, "rect_h", self->rect.h );
 649
 650                         SDL_SetClipRect( SDL_GetVideoSurface(), &self->rect );
 651                 }
 652
 653                 if ( self->running && SDL_GetVideoSurface() && self->sdl_overlay == NULL )
 654                 {
 655                         SDL_SetClipRect( SDL_GetVideoSurface(), &self->rect );
 656                         self->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, SDL_GetVideoSurface() );
 657                 }
 658
 659                 if ( self->running && SDL_GetVideoSurface() && self->sdl_overlay != NULL )
 660                 {
 661                         self->buffer = self->sdl_overlay->pixels[ 0 ];
 662                         if ( SDL_LockYUVOverlay( self->sdl_overlay ) >= 0 )
 663                         {
 664                                 if ( image != NULL )
 665                                         memcpy( self->buffer, image, width * height * 2 );
 666                                 SDL_UnlockYUVOverlay( self->sdl_overlay );
 667                                 SDL_DisplayYUVOverlay( self->sdl_overlay, &SDL_GetVideoSurface()->clip_rect );
 668                         }
 669                 }
 670
 671                 sdl_unlock_display();
 672                 mlt_cocoa_autorelease_close( pool );
 673                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 674         }
 675         else if ( self->running )
 676         {
 677                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 678                 if ( !video_off )
 679                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 680                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 681         }
 682
 683         return 0;
 684 }
 685
 686 static void *video_thread( void *arg )
 687 {
 688         // Identify the arg
 689         consumer_sdl self = arg;
 690
 691         // Obtain time of thread start
 692         struct timeval now;
 693         int64_t start = 0;
 694         int64_t elapsed = 0;
 695         struct timespec tm;
 696         mlt_frame next = NULL;
 697         mlt_properties properties = NULL;
 698         double speed = 0;
 699
 700         // Get real time flag
 701         int real_time = mlt_properties_get_int( self->properties, "real_time" );
 702
 703         // Get the current time
 704         gettimeofday( &now, NULL );
 705
 706         // Determine start time
 707         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 708
 709         while ( self->running )
 710         {
 711                 // Pop the next frame
 712                 pthread_mutex_lock( &self->video_mutex );
 713                 next = mlt_deque_pop_front( self->queue );
 714                 while ( next == NULL && self->running )
 715                 {
 716                         pthread_cond_wait( &self->video_cond, &self->video_mutex );
 717                         next = mlt_deque_pop_front( self->queue );
 718                 }
 719                 pthread_mutex_unlock( &self->video_mutex );
 720
 721                 if ( !self->running || next == NULL ) break;
 722
 723                 // Get the properties
 724                 properties =  MLT_FRAME_PROPERTIES( next );
 725
 726                 // Get the speed of the frame
 727                 speed = mlt_properties_get_double( properties, "_speed" );
 728
 729                 // Get the current time
 730                 gettimeofday( &now, NULL );
 731
 732                 // Get the elapsed time
 733                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 734
 735                 // See if we have to delay the display of the current frame
 736                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && self->running )
 737                 {
 738                         // Obtain the scheduled playout time
 739                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 740
 741                         // Determine the difference between the elapsed time and the scheduled playout time
 742                         int64_t difference = scheduled - elapsed;
 743
 744                         // Smooth playback a bit
 745                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 746                         {
 747                                 tm.tv_sec = difference / 1000000;
 748                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 749                                 nanosleep( &tm, NULL );
 750                         }
 751
 752                         // Show current frame if not too old
 753                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( self->queue ) < 2 ) )
 754                                 consumer_play_video( self, next );
 755
 756                         // If the queue is empty, recalculate start to allow build up again
 757                         if ( real_time && ( mlt_deque_count( self->queue ) == 0 && speed == 1.0 ) )
 758                         {
 759                                 gettimeofday( &now, NULL );
 760                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 761                         }
 762                 }
 763                 else
 764                 {
 765                         static int dropped = 0;
 766                         mlt_log_info( MLT_CONSUMER_SERVICE(&self->parent), "dropped video frame %d\n", ++dropped );
 767                 }
 768
 769                 // This frame can now be closed
 770                 mlt_frame_close( next );
 771                 next = NULL;
 772         }
 773
 774         if ( next != NULL )
 775                 mlt_frame_close( next );
 776
 777         mlt_consumer_stopped( &self->parent );
 778
 779         return NULL;
 780 }
 781
 782 /** Threaded wrapper for pipe.
 783 */
 784
 785 static void *consumer_thread( void *arg )
 786 {
 787         // Identify the arg
 788         consumer_sdl self = arg;
 789
 790         // Get the consumer
 791         mlt_consumer consumer = &self->parent;
 792
 793         // Convenience functionality
 794         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 795         int terminated = 0;
 796
 797         // Video thread
 798         pthread_t thread;
 799
 800         // internal intialization
 801         int init_audio = 1;
 802         int init_video = 1;
 803         mlt_frame frame = NULL;
 804         int duration = 0;
 805         int64_t playtime = 0;
 806         struct timespec tm = { 0, 100000 };
 807
 808         // Loop until told not to
 809         while( self->running )
 810         {
 811                 // Get a frame from the attached producer
 812                 frame = !terminated? mlt_consumer_rt_frame( consumer ) : NULL;
 813
 814                 // Check for termination
 815                 if ( terminate_on_pause && frame )
 816                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 817
 818                 // Ensure that we have a frame
 819                 if ( frame )
 820                 {
 821                         // Play audio
 822                         init_audio = consumer_play_audio( self, frame, init_audio, &duration );
 823
 824                         // Determine the start time now
 825                         if ( self->playing && init_video )
 826                         {
 827                                 // Create the video thread
 828                                 pthread_create( &thread, NULL, video_thread, self );
 829
 830                                 // Video doesn't need to be initialised any more
 831                                 init_video = 0;
 832                         }
 833
 834                         // Set playtime for this frame
 835                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "playtime", playtime );
 836
 837                         while ( self->running && mlt_deque_count( self->queue ) > 15 )
 838                                 nanosleep( &tm, NULL );
 839
 840                         // Push this frame to the back of the queue
 841                         pthread_mutex_lock( &self->video_mutex );
 842                         if ( self->is_purge )
 843                         {
 844                                 mlt_frame_close( frame );
 845                                 frame = NULL;
 846                                 self->is_purge = 0;
 847                         }
 848                         else
 849                         {
 850                                 mlt_deque_push_back( self->queue, frame );
 851                                 pthread_cond_broadcast( &self->video_cond );
 852                         }
 853                         pthread_mutex_unlock( &self->video_mutex );
 854
 855                         // Calculate the next playtime
 856                         playtime += ( duration * 1000 );
 857                 }
 858                 else if ( terminated )
 859                 {
 860                         if ( init_video || mlt_deque_count( self->queue ) == 0 )
 861                                 break;
 862                         else
 863                                 nanosleep( &tm, NULL );
 864                 }
 865         }
 866
 867         self->running = 0;
 868
 869         // Unblock sdl_preview
 870         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "put_mode" ) == 1 )
 871         {
 872                 frame = mlt_consumer_get_frame( consumer );
 873                 if ( frame )
 874                         mlt_frame_close( frame );
 875                 frame = NULL;
 876         }
 877
 878         // Kill the video thread
 879         if ( init_video == 0 )
 880         {
 881                 pthread_mutex_lock( &self->video_mutex );
 882                 pthread_cond_broadcast( &self->video_cond );
 883                 pthread_mutex_unlock( &self->video_mutex );
 884                 pthread_join( thread, NULL );
 885         }
 886
 887         while( mlt_deque_count( self->queue ) )
 888                 mlt_frame_close( mlt_deque_pop_back( self->queue ) );
 889
 890         self->audio_avail = 0;
 891
 892         return NULL;
 893 }
 894
 895 static int consumer_get_dimensions( int *width, int *height )
 896 {
 897         int changed = 0;
 898
 899         // SDL windows manager structure
 900         SDL_SysWMinfo wm;
 901
 902         // Specify the SDL Version
 903         SDL_VERSION( &wm.version );
 904
 905         // Lock the display
 906         //sdl_lock_display();
 907
 908 #ifndef __DARWIN__
 909         // Get the wm structure
 910         if ( SDL_GetWMInfo( &wm ) == 1 )
 911         {
 912 #ifndef WIN32
 913                 // Check that we have the X11 wm
 914                 if ( wm.subsystem == SDL_SYSWM_X11 )
 915                 {
 916                         // Get the SDL window
 917                         Window window = wm.info.x11.window;
 918
 919                         // Get the display session
 920                         Display *display = wm.info.x11.display;
 921
 922                         // Get the window attributes
 923                         XWindowAttributes attr;
 924                         XGetWindowAttributes( display, window, &attr );
 925
 926                         // Determine whether window has changed
 927                         changed = *width != attr.width || *height != attr.height;
 928
 929                         // Return width and height
 930                         *width = attr.width;
 931                         *height = attr.height;
 932                 }
 933 #endif
 934         }
 935 #endif
 936
 937         // Unlock the display
 938         //sdl_unlock_display();
 939
 940         return changed;
 941 }
 942
 943 /** Callback to allow override of the close method.
 944 */
 945
 946 static void consumer_close( mlt_consumer parent )
 947 {
 948         // Get the actual object
 949         consumer_sdl self = parent->child;
 950
 951         // Stop the consumer
 952         ///mlt_consumer_stop( parent );
 953
 954         // Now clean up the rest
 955         mlt_consumer_close( parent );
 956
 957         // Close the queue
 958         mlt_deque_close( self->queue );
 959
 960         // Destroy mutexes
 961         pthread_mutex_destroy( &self->audio_mutex );
 962         pthread_cond_destroy( &self->audio_cond );
 963
 964         // Finally clean up this
 965         free( self );
 966 }