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                                 pthread_mutex_lock( &mlt_sdl_mutex );
 260                                 vi = SDL_GetVideoInfo();
 261                                 pthread_mutex_unlock( &mlt_sdl_mutex );
 262                                 self->window_width = vi->current_w;
 263                                 self->window_height = vi->current_h;
 264                                 self->sdl_flags |= SDL_FULLSCREEN;
 265                                 SDL_ShowCursor( SDL_DISABLE );
 266                         }
 267                         SDL_SetVideoMode( self->window_width, self->window_height, 0, self->sdl_flags );
 268                 }
 269                 pthread_mutex_unlock( &mlt_sdl_mutex );
 270
 271                 pthread_create( &self->thread, NULL, consumer_thread, self );
 272         }
 273
 274         return 0;
 275 }
 276
 277 int consumer_stop( mlt_consumer parent )
 278 {
 279         // Get the actual object
 280         consumer_sdl self = parent->child;
 281
 282         if ( self->joined == 0 )
 283         {
 284                 // Kill the thread and clean up
 285                 self->joined = 1;
 286                 self->running = 0;
 287 #ifndef WIN32
 288                 if ( self->thread )
 289 #endif
 290                         pthread_join( self->thread, NULL );
 291
 292                 // internal cleanup
 293                 if ( self->sdl_overlay != NULL )
 294                         SDL_FreeYUVOverlay( self->sdl_overlay );
 295                 self->sdl_overlay = NULL;
 296
 297                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 298                 {
 299                         pthread_mutex_lock( &self->audio_mutex );
 300                         pthread_cond_broadcast( &self->audio_cond );
 301                         pthread_mutex_unlock( &self->audio_mutex );
 302                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 303                 }
 304
 305                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 306                 {
 307                         pthread_mutex_lock( &mlt_sdl_mutex );
 308                         SDL_Quit( );
 309                         pthread_mutex_unlock( &mlt_sdl_mutex );
 310                 }
 311         }
 312
 313         return 0;
 314 }
 315
 316 int consumer_is_stopped( mlt_consumer parent )
 317 {
 318         consumer_sdl self = parent->child;
 319         return !self->running;
 320 }
 321
 322 void consumer_purge( mlt_consumer parent )
 323 {
 324         consumer_sdl self = parent->child;
 325         if ( self->running )
 326         {
 327                 pthread_mutex_lock( &self->video_mutex );
 328                 while ( mlt_deque_count( self->queue ) )
 329                         mlt_frame_close( mlt_deque_pop_back( self->queue ) );
 330                 self->is_purge = 1;
 331                 pthread_cond_broadcast( &self->video_cond );
 332                 pthread_mutex_unlock( &self->video_mutex );
 333         }
 334 }
 335
 336 static int sdl_lock_display( )
 337 {
 338         pthread_mutex_lock( &mlt_sdl_mutex );
 339         SDL_Surface *screen = SDL_GetVideoSurface( );
 340         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 341         pthread_mutex_unlock( &mlt_sdl_mutex );
 342         return result;
 343 }
 344
 345 static void sdl_unlock_display( )
 346 {
 347         pthread_mutex_lock( &mlt_sdl_mutex );
 348         SDL_Surface *screen = SDL_GetVideoSurface( );
 349         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 350                 SDL_UnlockSurface( screen );
 351         pthread_mutex_unlock( &mlt_sdl_mutex );
 352 }
 353
 354 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 355 {
 356         consumer_sdl self = udata;
 357
 358         // Get the volume
 359         double volume = mlt_properties_get_double( self->properties, "volume" );
 360
 361         pthread_mutex_lock( &self->audio_mutex );
 362
 363         // Block until audio received
 364         while ( self->running && len > self->audio_avail )
 365                 pthread_cond_wait( &self->audio_cond, &self->audio_mutex );
 366
 367         if ( self->audio_avail >= len )
 368         {
 369                 // Place in the audio buffer
 370                 if ( volume != 1.0 )
 371                         SDL_MixAudio( stream, self->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 372                 else
 373                         memcpy( stream, self->audio_buffer, len );
 374
 375                 // Remove len from the audio available
 376                 self->audio_avail -= len;
 377
 378                 // Remove the samples
 379                 memmove( self->audio_buffer, self->audio_buffer + len, self->audio_avail );
 380         }
 381         else
 382         {
 383                 // Just to be safe, wipe the stream first
 384                 memset( stream, 0, len );
 385
 386                 // Mix the audio
 387                 SDL_MixAudio( stream, self->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 388
 389                 // No audio left
 390                 self->audio_avail = 0;
 391         }
 392
 393         // We're definitely playing now
 394         self->playing = 1;
 395
 396         pthread_cond_broadcast( &self->audio_cond );
 397         pthread_mutex_unlock( &self->audio_mutex );
 398 }
 399
 400 static int consumer_play_audio( consumer_sdl self, mlt_frame frame, int init_audio, int *duration )
 401 {
 402         // Get the properties of self consumer
 403         mlt_properties properties = self->properties;
 404         mlt_audio_format afmt = mlt_audio_s16;
 405
 406         // Set the preferred params of the test card signal
 407         int channels = mlt_properties_get_int( properties, "channels" );
 408         int dest_channels = channels;
 409         int frequency = mlt_properties_get_int( properties, "frequency" );
 410         static int counter = 0;
 411
 412         int samples = mlt_sample_calculator( mlt_properties_get_double( self->properties, "fps" ), frequency, counter++ );
 413
 414         int16_t *pcm;
 415         int bytes;
 416
 417         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 418         *duration = ( ( samples * 1000 ) / frequency );
 419         pcm += mlt_properties_get_int( properties, "audio_offset" );
 420
 421         if ( mlt_properties_get_int( properties, "audio_off" ) )
 422         {
 423                 self->playing = 1;
 424                 init_audio = 1;
 425                 return init_audio;
 426         }
 427
 428         if ( init_audio == 1 )
 429         {
 430                 SDL_AudioSpec request;
 431                 SDL_AudioSpec got;
 432
 433                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 434
 435                 // specify audio format
 436                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 437                 self->playing = 0;
 438                 request.freq = frequency;
 439                 request.format = AUDIO_S16SYS;
 440                 request.channels = dest_channels;
 441                 request.samples = audio_buffer;
 442                 request.callback = sdl_fill_audio;
 443                 request.userdata = (void *)self;
 444                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 445                 {
 446                         mlt_log_error( MLT_CONSUMER_SERVICE( self ), "SDL failed to open audio: %s\n", SDL_GetError() );
 447                         init_audio = 2;
 448                 }
 449                 else if ( got.size != 0 )
 450                 {
 451                         SDL_PauseAudio( 0 );
 452                         init_audio = 0;
 453                 }
 454         }
 455
 456         if ( init_audio == 0 )
 457         {
 458                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 459
 460                 bytes = samples * dest_channels * sizeof(*pcm);
 461                 pthread_mutex_lock( &self->audio_mutex );
 462                 while ( self->running && bytes > ( sizeof( self->audio_buffer) - self->audio_avail ) )
 463                         pthread_cond_wait( &self->audio_cond, &self->audio_mutex );
 464                 if ( self->running )
 465                 {
 466                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 467                         {
 468                                 if ( channels == dest_channels )
 469                                 {
 470                                         memcpy( &self->audio_buffer[ self->audio_avail ], pcm, bytes );
 471                                 }
 472                                 else
 473                                 {
 474                                         int16_t *dest = (int16_t*) &self->audio_buffer[ self->audio_avail ];
 475                                         int i = samples + 1;
 476
 477                                         while ( --i )
 478                                         {
 479                                                 memcpy( dest, pcm, dest_channels * sizeof(*pcm) );
 480                                                 pcm += channels;
 481                                                 dest += dest_channels;
 482                                         }
 483                                 }
 484                         }
 485                         else
 486                         {
 487                                 memset( &self->audio_buffer[ self->audio_avail ], 0, bytes );
 488                         }
 489                         self->audio_avail += bytes;
 490                 }
 491                 pthread_cond_broadcast( &self->audio_cond );
 492                 pthread_mutex_unlock( &self->audio_mutex );
 493         }
 494         else
 495         {
 496                 self->playing = 1;
 497         }
 498
 499         return init_audio;
 500 }
 501
 502 static int consumer_play_video( consumer_sdl self, mlt_frame frame )
 503 {
 504         // Get the properties of this consumer
 505         mlt_properties properties = self->properties;
 506
 507         mlt_image_format vfmt = mlt_image_yuv422;
 508         int width = self->width, height = self->height;
 509         uint8_t *image;
 510         int changed = 0;
 511
 512         int video_off = mlt_properties_get_int( properties, "video_off" );
 513         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 514         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 515         int display_off = video_off | preview_off;
 516
 517         if ( self->running && display_off == 0 )
 518         {
 519                 // Get the image, width and height
 520                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 521
 522                 void *pool = mlt_cocoa_autorelease_init();
 523
 524                 // Handle events
 525                 if ( SDL_GetVideoSurface() )
 526                 {
 527                         SDL_Event event;
 528
 529                         sdl_lock_display( );
 530                         pthread_mutex_lock( &mlt_sdl_mutex );
 531                         changed = consumer_get_dimensions( &self->window_width, &self->window_height );
 532                         pthread_mutex_unlock( &mlt_sdl_mutex );
 533                         sdl_unlock_display( );
 534
 535                         while ( SDL_PollEvent( &event ) )
 536                         {
 537                                 mlt_events_fire( self->properties, "consumer-sdl-event", &event, NULL );
 538
 539                                 switch( event.type )
 540                                 {
 541                                         case SDL_VIDEORESIZE:
 542                                                 self->window_width = event.resize.w;
 543                                                 self->window_height = event.resize.h;
 544                                                 changed = 1;
 545                                                 break;
 546                                         case SDL_QUIT:
 547                                                 self->running = 0;
 548                                                 break;
 549                                         case SDL_KEYDOWN:
 550                                                 {
 551                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 552                                                         char keyboard[ 2 ] = " ";
 553                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 554                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 555                                                         {
 556                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 557                                                                 callback( producer, keyboard );
 558                                                         }
 559                                                 }
 560                                                 break;
 561                                 }
 562                         }
 563                 }
 564
 565                 sdl_lock_display();
 566
 567                 if ( width != self->width || height != self->height )
 568                 {
 569                         if ( self->sdl_overlay != NULL )
 570                                 SDL_FreeYUVOverlay( self->sdl_overlay );
 571                         self->sdl_overlay = NULL;
 572                 }
 573
 574                 if ( self->running && ( !SDL_GetVideoSurface() || changed ) )
 575                 {
 576                         // Force an overlay recreation
 577                         if ( self->sdl_overlay != NULL )
 578                                 SDL_FreeYUVOverlay( self->sdl_overlay );
 579                         self->sdl_overlay = NULL;
 580
 581                         // open SDL window with video overlay, if possible
 582                         pthread_mutex_lock( &mlt_sdl_mutex );
 583                         SDL_Surface *screen = SDL_SetVideoMode( self->window_width, self->window_height, self->bpp, self->sdl_flags );
 584                         if ( consumer_get_dimensions( &self->window_width, &self->window_height ) )
 585                                 screen = SDL_SetVideoMode( self->window_width, self->window_height, self->bpp, self->sdl_flags );
 586                         pthread_mutex_unlock( &mlt_sdl_mutex );
 587
 588                         if ( screen )
 589                         {
 590                                 uint32_t color = mlt_properties_get_int( self->properties, "window_background" );
 591                                 SDL_FillRect( screen, NULL, color >> 8 );
 592                                 SDL_Flip( screen );
 593                         }
 594                 }
 595
 596                 if ( self->running )
 597                 {
 598                         // Determine window's new display aspect ratio
 599                         double this_aspect = ( double )self->window_width / self->window_height;
 600
 601                         // Get the display aspect ratio
 602                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 603
 604                         // Determine frame's display aspect ratio
 605                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 606
 607                         // Store the width and height received
 608                         self->width = width;
 609                         self->height = height;
 610
 611                         // If using hardware scaler
 612                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 613                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 614                         {
 615                                 // Use hardware scaler to normalise display aspect ratio
 616                                 self->rect.w = frame_aspect / this_aspect * self->window_width;
 617                                 self->rect.h = self->window_height;
 618                                 if ( self->rect.w > self->window_width )
 619                                 {
 620                                         self->rect.w = self->window_width;
 621                                         self->rect.h = this_aspect / frame_aspect * self->window_height;
 622                                 }
 623                         }
 624                         // Special case optimisation to negate odd effect of sample aspect ratio
 625                         // not corresponding exactly with image resolution.
 626                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 627                         {
 628                                 self->rect.w = self->window_width;
 629                                 self->rect.h = self->window_height;
 630                         }
 631                         // Use hardware scaler to normalise sample aspect ratio
 632                         else if ( self->window_height * display_ratio > self->window_width )
 633                         {
 634                                 self->rect.w = self->window_width;
 635                                 self->rect.h = self->window_width / display_ratio;
 636                         }
 637                         else
 638                         {
 639                                 self->rect.w = self->window_height * display_ratio;
 640                                 self->rect.h = self->window_height;
 641                         }
 642
 643                         self->rect.x = ( self->window_width - self->rect.w ) / 2;
 644                         self->rect.y = ( self->window_height - self->rect.h ) / 2;
 645                         self->rect.x -= self->rect.x % 2;
 646
 647                         mlt_properties_set_int( self->properties, "rect_x", self->rect.x );
 648                         mlt_properties_set_int( self->properties, "rect_y", self->rect.y );
 649                         mlt_properties_set_int( self->properties, "rect_w", self->rect.w );
 650                         mlt_properties_set_int( self->properties, "rect_h", self->rect.h );
 651
 652                         SDL_SetClipRect( SDL_GetVideoSurface(), &self->rect );
 653                 }
 654
 655                 if ( self->running && SDL_GetVideoSurface() && self->sdl_overlay == NULL )
 656                 {
 657                         SDL_SetClipRect( SDL_GetVideoSurface(), &self->rect );
 658                         self->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, SDL_GetVideoSurface() );
 659                 }
 660
 661                 if ( self->running && SDL_GetVideoSurface() && self->sdl_overlay != NULL )
 662                 {
 663                         self->buffer = self->sdl_overlay->pixels[ 0 ];
 664                         if ( SDL_LockYUVOverlay( self->sdl_overlay ) >= 0 )
 665                         {
 666                                 if ( image != NULL )
 667                                         memcpy( self->buffer, image, width * height * 2 );
 668                                 SDL_UnlockYUVOverlay( self->sdl_overlay );
 669                                 SDL_DisplayYUVOverlay( self->sdl_overlay, &SDL_GetVideoSurface()->clip_rect );
 670                         }
 671                 }
 672
 673                 sdl_unlock_display();
 674                 mlt_cocoa_autorelease_close( pool );
 675                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 676         }
 677         else if ( self->running )
 678         {
 679                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 680                 if ( !video_off )
 681                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 682                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 683         }
 684
 685         return 0;
 686 }
 687
 688 static void *video_thread( void *arg )
 689 {
 690         // Identify the arg
 691         consumer_sdl self = arg;
 692
 693         // Obtain time of thread start
 694         struct timeval now;
 695         int64_t start = 0;
 696         int64_t elapsed = 0;
 697         struct timespec tm;
 698         mlt_frame next = NULL;
 699         mlt_properties properties = NULL;
 700         double speed = 0;
 701
 702         // Get real time flag
 703         int real_time = mlt_properties_get_int( self->properties, "real_time" );
 704
 705         // Get the current time
 706         gettimeofday( &now, NULL );
 707
 708         // Determine start time
 709         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 710
 711         while ( self->running )
 712         {
 713                 // Pop the next frame
 714                 pthread_mutex_lock( &self->video_mutex );
 715                 next = mlt_deque_pop_front( self->queue );
 716                 while ( next == NULL && self->running )
 717                 {
 718                         pthread_cond_wait( &self->video_cond, &self->video_mutex );
 719                         next = mlt_deque_pop_front( self->queue );
 720                 }
 721                 pthread_mutex_unlock( &self->video_mutex );
 722
 723                 if ( !self->running || next == NULL ) break;
 724
 725                 // Get the properties
 726                 properties =  MLT_FRAME_PROPERTIES( next );
 727
 728                 // Get the speed of the frame
 729                 speed = mlt_properties_get_double( properties, "_speed" );
 730
 731                 // Get the current time
 732                 gettimeofday( &now, NULL );
 733
 734                 // Get the elapsed time
 735                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 736
 737                 // See if we have to delay the display of the current frame
 738                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && self->running )
 739                 {
 740                         // Obtain the scheduled playout time
 741                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 742
 743                         // Determine the difference between the elapsed time and the scheduled playout time
 744                         int64_t difference = scheduled - elapsed;
 745
 746                         // Smooth playback a bit
 747                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 748                         {
 749                                 tm.tv_sec = difference / 1000000;
 750                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 751                                 nanosleep( &tm, NULL );
 752                         }
 753
 754                         // Show current frame if not too old
 755                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( self->queue ) < 2 ) )
 756                                 consumer_play_video( self, next );
 757
 758                         // If the queue is empty, recalculate start to allow build up again
 759                         if ( real_time && ( mlt_deque_count( self->queue ) == 0 && speed == 1.0 ) )
 760                         {
 761                                 gettimeofday( &now, NULL );
 762                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 763                         }
 764                 }
 765                 else
 766                 {
 767                         static int dropped = 0;
 768                         mlt_log_info( MLT_CONSUMER_SERVICE(&self->parent), "dropped video frame %d\n", ++dropped );
 769                 }
 770
 771                 // This frame can now be closed
 772                 mlt_frame_close( next );
 773                 next = NULL;
 774         }
 775
 776         if ( next != NULL )
 777                 mlt_frame_close( next );
 778
 779         mlt_consumer_stopped( &self->parent );
 780
 781         return NULL;
 782 }
 783
 784 /** Threaded wrapper for pipe.
 785 */
 786
 787 static void *consumer_thread( void *arg )
 788 {
 789         // Identify the arg
 790         consumer_sdl self = arg;
 791
 792         // Get the consumer
 793         mlt_consumer consumer = &self->parent;
 794
 795         // Convenience functionality
 796         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 797         int terminated = 0;
 798
 799         // Video thread
 800         pthread_t thread;
 801
 802         // internal intialization
 803         int init_audio = 1;
 804         int init_video = 1;
 805         mlt_frame frame = NULL;
 806         int duration = 0;
 807         int64_t playtime = 0;
 808         struct timespec tm = { 0, 100000 };
 809
 810         // Loop until told not to
 811         while( self->running )
 812         {
 813                 // Get a frame from the attached producer
 814                 frame = !terminated? mlt_consumer_rt_frame( consumer ) : NULL;
 815
 816                 // Check for termination
 817                 if ( terminate_on_pause && frame )
 818                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 819
 820                 // Ensure that we have a frame
 821                 if ( frame )
 822                 {
 823                         // Play audio
 824                         init_audio = consumer_play_audio( self, frame, init_audio, &duration );
 825
 826                         // Determine the start time now
 827                         if ( self->playing && init_video )
 828                         {
 829                                 // Create the video thread
 830                                 pthread_create( &thread, NULL, video_thread, self );
 831
 832                                 // Video doesn't need to be initialised any more
 833                                 init_video = 0;
 834                         }
 835
 836                         // Set playtime for this frame
 837                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "playtime", playtime );
 838
 839                         while ( self->running && mlt_deque_count( self->queue ) > 15 )
 840                                 nanosleep( &tm, NULL );
 841
 842                         // Push this frame to the back of the queue
 843                         pthread_mutex_lock( &self->video_mutex );
 844                         if ( self->is_purge )
 845                         {
 846                                 mlt_frame_close( frame );
 847                                 frame = NULL;
 848                                 self->is_purge = 0;
 849                         }
 850                         else
 851                         {
 852                                 mlt_deque_push_back( self->queue, frame );
 853                                 pthread_cond_broadcast( &self->video_cond );
 854                         }
 855                         pthread_mutex_unlock( &self->video_mutex );
 856
 857                         // Calculate the next playtime
 858                         playtime += ( duration * 1000 );
 859                 }
 860                 else if ( terminated )
 861                 {
 862                         if ( init_video || mlt_deque_count( self->queue ) == 0 )
 863                                 break;
 864                         else
 865                                 nanosleep( &tm, NULL );
 866                 }
 867         }
 868
 869         self->running = 0;
 870
 871         // Unblock sdl_preview
 872         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "put_mode" ) == 1 )
 873         {
 874                 frame = mlt_consumer_get_frame( consumer );
 875                 if ( frame )
 876                         mlt_frame_close( frame );
 877                 frame = NULL;
 878         }
 879
 880         // Kill the video thread
 881         if ( init_video == 0 )
 882         {
 883                 pthread_mutex_lock( &self->video_mutex );
 884                 pthread_cond_broadcast( &self->video_cond );
 885                 pthread_mutex_unlock( &self->video_mutex );
 886                 pthread_join( thread, NULL );
 887         }
 888
 889         while( mlt_deque_count( self->queue ) )
 890                 mlt_frame_close( mlt_deque_pop_back( self->queue ) );
 891
 892         self->audio_avail = 0;
 893
 894         return NULL;
 895 }
 896
 897 static int consumer_get_dimensions( int *width, int *height )
 898 {
 899         int changed = 0;
 900
 901         // SDL windows manager structure
 902         SDL_SysWMinfo wm;
 903
 904         // Specify the SDL Version
 905         SDL_VERSION( &wm.version );
 906
 907         // Lock the display
 908         //sdl_lock_display();
 909
 910 #ifndef __DARWIN__
 911         // Get the wm structure
 912         if ( SDL_GetWMInfo( &wm ) == 1 )
 913         {
 914 #ifndef WIN32
 915                 // Check that we have the X11 wm
 916                 if ( wm.subsystem == SDL_SYSWM_X11 )
 917                 {
 918                         // Get the SDL window
 919                         Window window = wm.info.x11.window;
 920
 921                         // Get the display session
 922                         Display *display = wm.info.x11.display;
 923
 924                         // Get the window attributes
 925                         XWindowAttributes attr;
 926                         XGetWindowAttributes( display, window, &attr );
 927
 928                         // Determine whether window has changed
 929                         changed = *width != attr.width || *height != attr.height;
 930
 931                         // Return width and height
 932                         *width = attr.width;
 933                         *height = attr.height;
 934                 }
 935 #endif
 936         }
 937 #endif
 938
 939         // Unlock the display
 940         //sdl_unlock_display();
 941
 942         return changed;
 943 }
 944
 945 /** Callback to allow override of the close method.
 946 */
 947
 948 static void consumer_close( mlt_consumer parent )
 949 {
 950         // Get the actual object
 951         consumer_sdl self = parent->child;
 952
 953         // Stop the consumer
 954         ///mlt_consumer_stop( parent );
 955
 956         // Now clean up the rest
 957         mlt_consumer_close( parent );
 958
 959         // Close the queue
 960         mlt_deque_close( self->queue );
 961
 962         // Destroy mutexes
 963         pthread_mutex_destroy( &self->audio_mutex );
 964         pthread_cond_destroy( &self->audio_cond );
 965
 966         // Finally clean up this
 967         free( self );
 968 }