git.sesse.net Git - mlt/blob - src/modules/sdl/consumer_sdl.c

   1 /*
   2  * consumer_sdl.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2003-2004, 2010 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt_consumer.h>
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <framework/mlt_factory.h>
  25 #include <framework/mlt_filter.h>
  26 #include <framework/mlt_log.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <pthread.h>
  31 #include <SDL.h>
  32 #include <SDL_syswm.h>
  33 #include <sys/time.h>
  34 #include "consumer_sdl_osx.h"
  35
  36 extern pthread_mutex_t mlt_sdl_mutex;
  37
  38 /** This classes definition.
  39 */
  40
  41 typedef struct consumer_sdl_s *consumer_sdl;
  42
  43 struct consumer_sdl_s
  44 {
  45         struct mlt_consumer_s parent;
  46         mlt_properties properties;
  47         mlt_deque queue;
  48         pthread_t thread;
  49         int joined;
  50         int running;
  51         uint8_t audio_buffer[ 4096 * 10 ];
  52         int audio_avail;
  53         pthread_mutex_t audio_mutex;
  54         pthread_cond_t audio_cond;
  55         pthread_mutex_t video_mutex;
  56         pthread_cond_t video_cond;
  57         int window_width;
  58         int window_height;
  59         int previous_width;
  60         int previous_height;
  61         int width;
  62         int height;
  63         int playing;
  64         int sdl_flags;
  65         SDL_Surface *sdl_screen;
  66         SDL_Overlay *sdl_overlay;
  67         SDL_Rect rect;
  68         uint8_t *buffer;
  69         int bpp;
  70 };
  71
  72 /** Forward references to static functions.
  73 */
  74
  75 static int consumer_start( mlt_consumer parent );
  76 static int consumer_stop( mlt_consumer parent );
  77 static int consumer_is_stopped( mlt_consumer parent );
  78 static void consumer_close( mlt_consumer parent );
  79 static void *consumer_thread( void * );
  80 static int consumer_get_dimensions( int *width, int *height );
  81 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  82
  83 /** This is what will be called by the factory - anything can be passed in
  84         via the argument, but keep it simple.
  85 */
  86
  87 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  88 {
  89         // Create the consumer object
  90         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  91
  92         // If no malloc'd and consumer init ok
  93         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  94         {
  95                 // Create the queue
  96                 this->queue = mlt_deque_init( );
  97
  98                 // Get the parent consumer object
  99                 mlt_consumer parent = &this->parent;
 100
 101                 // We have stuff to clean up, so override the close method
 102                 parent->close = consumer_close;
 103
 104                 // get a handle on properties
 105                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 106                 this->properties = MLT_SERVICE_PROPERTIES( service );
 107
 108                 // Set the default volume
 109                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 110
 111                 // This is the initialisation of the consumer
 112                 pthread_mutex_init( &this->audio_mutex, NULL );
 113                 pthread_cond_init( &this->audio_cond, NULL);
 114                 pthread_mutex_init( &this->video_mutex, NULL );
 115                 pthread_cond_init( &this->video_cond, NULL);
 116
 117                 // Default scaler (for now we'll use nearest)
 118                 mlt_properties_set( this->properties, "rescale", "nearest" );
 119                 mlt_properties_set( this->properties, "deinterlace_method", "onefield" );
 120
 121                 // Default buffer for low latency
 122                 mlt_properties_set_int( this->properties, "buffer", 1 );
 123
 124                 // Default audio buffer
 125                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 126
 127                 // Ensure we don't join on a non-running object
 128                 this->joined = 1;
 129
 130                 // process actual param
 131                 if ( arg && sscanf( arg, "%dx%d", &this->width, &this->height ) )
 132                 {
 133                         mlt_properties_set_int( this->properties, "_arg_size", 1 );
 134                 }
 135                 else
 136                 {
 137                         this->width = mlt_properties_get_int( this->properties, "width" );
 138                         this->height = mlt_properties_get_int( this->properties, "height" );
 139                 }
 140
 141                 // Set the sdl flags
 142                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 143
 144                 // Allow thread to be started/stopped
 145                 parent->start = consumer_start;
 146                 parent->stop = consumer_stop;
 147                 parent->is_stopped = consumer_is_stopped;
 148
 149                 // Register specific events
 150                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 151
 152                 // Return the consumer produced
 153                 return parent;
 154         }
 155
 156         // malloc or consumer init failed
 157         free( this );
 158
 159         // Indicate failure
 160         return NULL;
 161 }
 162
 163 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 164 {
 165         if ( listener != NULL )
 166                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 167 }
 168
 169 int consumer_start( mlt_consumer parent )
 170 {
 171         consumer_sdl this = parent->child;
 172
 173         if ( !this->running )
 174         {
 175                 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
 176                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 177                 int display_off = video_off | preview_off;
 178                 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
 179                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 180
 181                 consumer_stop( parent );
 182
 183                 this->running = 1;
 184                 this->joined = 0;
 185
 186                 if ( ! mlt_properties_get_int( this->properties, "_arg_size" ) )
 187                 {
 188                         if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 189                                 this->width = mlt_properties_get_int( this->properties, "width" );
 190                         if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 191                                 this->height = mlt_properties_get_int( this->properties, "height" );
 192                 }
 193
 194                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 195
 196                 if ( sdl_started == 0 && display_off == 0 )
 197                 {
 198                         pthread_mutex_lock( &mlt_sdl_mutex );
 199                         int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 200                         pthread_mutex_unlock( &mlt_sdl_mutex );
 201                         if ( ret < 0 )
 202                         {
 203                                 mlt_log_error( MLT_CONSUMER_SERVICE(parent), "Failed to initialize SDL: %s\n", SDL_GetError() );
 204                                 return -1;
 205                         }
 206
 207                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 208                         SDL_EnableUNICODE( 1 );
 209                 }
 210                 else if ( display_off == 0 )
 211                 {
 212                         pthread_mutex_lock( &mlt_sdl_mutex );
 213                         this->sdl_screen = SDL_GetVideoSurface( );
 214                         pthread_mutex_unlock( &mlt_sdl_mutex );
 215                 }
 216
 217                 if ( !audio_off )
 218                 {
 219                         if ( !sdl_started )
 220                                 // Init the audio sub-system
 221                                 SDL_InitSubSystem( SDL_INIT_AUDIO );
 222                         else
 223                                 // write silence to the audio buffer, since the sdl_preview consumer is
 224                                 // in charge of initializing the audio sub-system
 225                                 SDL_PauseAudio( 0 );
 226                 }
 227
 228                 // Default window size
 229                 if ( mlt_properties_get_int( this->properties, "_arg_size" ) )
 230                 {
 231                         this->window_width = this->width;
 232                         this->window_height = this->height;
 233                 }
 234                 else
 235                 {
 236                         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 237                         this->window_width = ( double )this->height * display_ratio;
 238                         this->window_height = this->height;
 239                 }
 240
 241                 if ( this->sdl_screen == NULL && display_off == 0 )
 242                 {
 243                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 244                         {
 245                                 const SDL_VideoInfo *vi;
 246                                 pthread_mutex_lock( &mlt_sdl_mutex );
 247                                 vi = SDL_GetVideoInfo();
 248                                 pthread_mutex_unlock( &mlt_sdl_mutex );
 249                                 this->window_width = vi->current_w;
 250                                 this->window_height = vi->current_h;
 251                                 this->sdl_flags |= SDL_FULLSCREEN;
 252                                 SDL_ShowCursor( SDL_DISABLE );
 253                         }
 254                         pthread_mutex_lock( &mlt_sdl_mutex );
 255                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 256                         pthread_mutex_unlock( &mlt_sdl_mutex );
 257                 }
 258
 259                 pthread_create( &this->thread, NULL, consumer_thread, this );
 260         }
 261
 262         return 0;
 263 }
 264
 265 int consumer_stop( mlt_consumer parent )
 266 {
 267         // Get the actual object
 268         consumer_sdl this = parent->child;
 269
 270         if ( this->joined == 0 )
 271         {
 272                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 273                 int sdl_started = mlt_properties_get_int( properties, "sdl_started" );
 274                 int audio_off = mlt_properties_get_int( properties, "audio_off" );
 275                 int quit_audio_subsystem = mlt_properties_get_int( properties, "quit_audio_subsystem" );
 276
 277                 // Kill the thread and clean up
 278                 this->joined = 1;
 279                 this->running = 0;
 280                 if ( this->thread )
 281                         pthread_join( this->thread, NULL );
 282
 283                 // internal cleanup
 284                 if ( this->sdl_overlay != NULL )
 285                         SDL_FreeYUVOverlay( this->sdl_overlay );
 286                 this->sdl_overlay = NULL;
 287
 288                 if ( !audio_off )
 289                 {
 290                         if ( !sdl_started || quit_audio_subsystem )
 291                         {
 292                                 // quit the audio sub-system, if this is a normal sdl consumer,
 293                                 // or if the 'quit_audio_subsystem' property is set to 1
 294                                 pthread_mutex_lock( &this->audio_mutex );
 295                                 pthread_cond_broadcast( &this->audio_cond );
 296                                 pthread_mutex_unlock( &this->audio_mutex );
 297                                 SDL_QuitSubSystem( SDL_INIT_AUDIO );
 298                         }
 299                         else
 300                                 // Write silence to the audio buffer.  This is used when the sdl_preview
 301                                 // consumer is in charge of the audio sub-system.
 302                                 SDL_PauseAudio( 1 );
 303                 }
 304
 305                 // Shutdown SDL if this consumer is not controlled by the SDL preview consumer
 306                 if ( !sdl_started )
 307                 {
 308                         pthread_mutex_lock( &mlt_sdl_mutex );
 309                         SDL_Quit( );
 310                         pthread_mutex_unlock( &mlt_sdl_mutex );
 311                 }
 312
 313                 this->sdl_screen = NULL;
 314         }
 315
 316         return 0;
 317 }
 318
 319 int consumer_is_stopped( mlt_consumer parent )
 320 {
 321         consumer_sdl this = parent->child;
 322         return !this->running;
 323 }
 324
 325 static int sdl_lock_display( )
 326 {
 327         pthread_mutex_lock( &mlt_sdl_mutex );
 328         SDL_Surface *screen = SDL_GetVideoSurface( );
 329         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 330         pthread_mutex_unlock( &mlt_sdl_mutex );
 331         return result;
 332 }
 333
 334 static void sdl_unlock_display( )
 335 {
 336         pthread_mutex_lock( &mlt_sdl_mutex );
 337         SDL_Surface *screen = SDL_GetVideoSurface( );
 338         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 339                 SDL_UnlockSurface( screen );
 340         pthread_mutex_unlock( &mlt_sdl_mutex );
 341 }
 342
 343 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 344 {
 345         consumer_sdl this = udata;
 346
 347         // Get the volume
 348         double volume = mlt_properties_get_double( this->properties, "volume" );
 349
 350         pthread_mutex_lock( &this->audio_mutex );
 351
 352         // Block until audio received
 353         while ( this->running && len > this->audio_avail )
 354                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 355
 356         if ( this->audio_avail >= len )
 357         {
 358                 // Place in the audio buffer
 359                 if ( volume != 1.0 )
 360                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 361                 else
 362                         memcpy( stream, this->audio_buffer, len );
 363
 364                 // Remove len from the audio available
 365                 this->audio_avail -= len;
 366
 367                 // Remove the samples
 368                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 369         }
 370         else
 371         {
 372                 // Just to be safe, wipe the stream first
 373                 memset( stream, 0, len );
 374
 375                 // Mix the audio
 376                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 377
 378                 // No audio left
 379                 this->audio_avail = 0;
 380         }
 381
 382         // We're definitely playing now
 383         this->playing = 1;
 384
 385         pthread_cond_broadcast( &this->audio_cond );
 386         pthread_mutex_unlock( &this->audio_mutex );
 387 }
 388
 389 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 390 {
 391         // Get the properties of this consumer
 392         mlt_properties properties = this->properties;
 393         mlt_audio_format afmt = mlt_audio_s16;
 394
 395         // Set the preferred params of the test card signal
 396         int channels = mlt_properties_get_int( properties, "channels" );
 397         int dest_channels = channels;
 398         int frequency = mlt_properties_get_int( properties, "frequency" );
 399         static int counter = 0;
 400
 401         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 402
 403         int16_t *pcm;
 404         int bytes;
 405
 406         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 407         *duration = ( ( samples * 1000 ) / frequency );
 408         pcm += mlt_properties_get_int( properties, "audio_offset" );
 409
 410         if ( mlt_properties_get_int( properties, "audio_off" ) )
 411         {
 412                 this->playing = 1;
 413                 init_audio = 1;
 414                 return init_audio;
 415         }
 416
 417         if ( init_audio == 1 )
 418         {
 419                 SDL_AudioSpec request;
 420                 SDL_AudioSpec got;
 421
 422                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 423
 424                 // specify audio format
 425                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 426                 this->playing = 0;
 427                 request.freq = frequency;
 428                 request.format = AUDIO_S16SYS;
 429                 request.channels = dest_channels;
 430                 request.samples = audio_buffer;
 431                 request.callback = sdl_fill_audio;
 432                 request.userdata = (void *)this;
 433
 434                 // determine if we should open the audio
 435                 int audio_opened = mlt_properties_get_int( properties, "audio_opened" );
 436
 437                 // open the audio device once
 438                 if ( !audio_opened && SDL_OpenAudio( &request, &got ) )
 439                 {
 440                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 441                         init_audio = 2;
 442                 }
 443                 else
 444                 {
 445                         // do not open the audio again for this consumer
 446                         mlt_properties_set_int( properties, "audio_opened", 1 );
 447
 448                         // write silence to the audio buffer
 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( &this->audio_mutex );
 460                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 461                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 462                 if ( this->running )
 463                 {
 464                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 465                         {
 466                                 if ( channels == dest_channels )
 467                                 {
 468                                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 469                                 }
 470                                 else
 471                                 {
 472                                         int16_t *dest = (int16_t*) &this->audio_buffer[ this->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( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 486                         }
 487                         this->audio_avail += bytes;
 488                 }
 489                 pthread_cond_broadcast( &this->audio_cond );
 490                 pthread_mutex_unlock( &this->audio_mutex );
 491         }
 492         else
 493         {
 494                 this->playing = 1;
 495         }
 496
 497         return init_audio;
 498 }
 499
 500 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 501 {
 502         // Get the properties of this consumer
 503         mlt_properties properties = this->properties;
 504
 505         mlt_image_format vfmt = mlt_image_yuv422;
 506         int width = this->width, height = this->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 ( this->running && display_off == 0 )
 516         {
 517                 // Get the image, width and height
 518                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 519                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 520
 521                 void *pool = mlt_cocoa_autorelease_init();
 522
 523                 // Handle events
 524                 if ( this->sdl_screen != NULL )
 525                 {
 526                         SDL_Event event;
 527
 528                         sdl_lock_display( );
 529                         pthread_mutex_lock( &mlt_sdl_mutex );
 530                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 531                         pthread_mutex_unlock( &mlt_sdl_mutex );
 532                         sdl_unlock_display( );
 533
 534                         while ( SDL_PollEvent( &event ) )
 535                         {
 536                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 537
 538                                 switch( event.type )
 539                                 {
 540                                         case SDL_VIDEORESIZE:
 541                                                 this->window_width = event.resize.w;
 542                                                 this->window_height = event.resize.h;
 543                                                 changed = 1;
 544                                                 break;
 545                                         case SDL_QUIT:
 546                                                 this->running = 0;
 547                                                 break;
 548                                         case SDL_KEYDOWN:
 549                                                 {
 550                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 551                                                         char keyboard[ 2 ] = " ";
 552                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 553                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 554                                                         {
 555                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 556                                                                 callback( producer, keyboard );
 557                                                         }
 558                                                 }
 559                                                 break;
 560                                 }
 561                         }
 562                 }
 563
 564                 sdl_lock_display();
 565
 566                 if ( width != this->width || height != this->height )
 567                 {
 568                         if ( this->sdl_overlay != NULL )
 569                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 570                         this->sdl_overlay = NULL;
 571                 }
 572
 573                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 574                 {
 575                         // Force an overlay recreation
 576                         if ( this->sdl_overlay != NULL )
 577                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 578                         this->sdl_overlay = NULL;
 579
 580                         // open SDL window with video overlay, if possible
 581                         pthread_mutex_lock( &mlt_sdl_mutex );
 582                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 583                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 584                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 585                         pthread_mutex_unlock( &mlt_sdl_mutex );
 586
 587                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 588                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 589                         SDL_Flip( this->sdl_screen );
 590                 }
 591
 592                 if ( this->running )
 593                 {
 594                         // Determine window's new display aspect ratio
 595                         double this_aspect = ( double )this->window_width / this->window_height;
 596
 597                         // Get the display aspect ratio
 598                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 599
 600                         // Determine frame's display aspect ratio
 601                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 602
 603                         // Store the width and height received
 604                         this->width = width;
 605                         this->height = height;
 606
 607                         // If using hardware scaler
 608                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 609                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 610                         {
 611                                 // Use hardware scaler to normalise display aspect ratio
 612                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 613                                 this->rect.h = this->window_height;
 614                                 if ( this->rect.w > this->window_width )
 615                                 {
 616                                         this->rect.w = this->window_width;
 617                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 618                                 }
 619                         }
 620                         // Special case optimisation to negate odd effect of sample aspect ratio
 621                         // not corresponding exactly with image resolution.
 622                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 623                         {
 624                                 this->rect.w = this->window_width;
 625                                 this->rect.h = this->window_height;
 626                         }
 627                         // Use hardware scaler to normalise sample aspect ratio
 628                         else if ( this->window_height * display_ratio > this->window_width )
 629                         {
 630                                 this->rect.w = this->window_width;
 631                                 this->rect.h = this->window_width / display_ratio;
 632                         }
 633                         else
 634                         {
 635                                 this->rect.w = this->window_height * display_ratio;
 636                                 this->rect.h = this->window_height;
 637                         }
 638
 639                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 640                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 641                         this->rect.x -= this->rect.x % 2;
 642
 643                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 644                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 645                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 646                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 647
 648                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 649                 }
 650
 651                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 652                 {
 653                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 654                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 655                 }
 656
 657                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 658                 {
 659                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 660                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 661                         {
 662                                 if ( image != NULL )
 663                                         memcpy( this->buffer, image, width * height * 2 );
 664                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 665                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 666                         }
 667                 }
 668
 669                 sdl_unlock_display();
 670                 mlt_cocoa_autorelease_close( pool );
 671                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 672         }
 673         else if ( this->running )
 674         {
 675                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 676                 if ( !video_off )
 677                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 678                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 679                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 680         }
 681
 682         return 0;
 683 }
 684
 685 static void *video_thread( void *arg )
 686 {
 687         // Identify the arg
 688         consumer_sdl this = arg;
 689
 690         // Obtain time of thread start
 691         struct timeval now;
 692         int64_t start = 0;
 693         int64_t elapsed = 0;
 694         struct timespec tm;
 695         mlt_frame next = NULL;
 696         mlt_properties properties = NULL;
 697         double speed = 0;
 698
 699         // Get real time flag
 700         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 701
 702         // Get the current time
 703         gettimeofday( &now, NULL );
 704
 705         // Determine start time
 706         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 707
 708         while ( this->running )
 709         {
 710                 // Pop the next frame
 711                 pthread_mutex_lock( &this->video_mutex );
 712                 next = mlt_deque_pop_front( this->queue );
 713                 while ( next == NULL && this->running )
 714                 {
 715                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 716                         next = mlt_deque_pop_front( this->queue );
 717                 }
 718                 pthread_mutex_unlock( &this->video_mutex );
 719
 720                 if ( !this->running || next == NULL ) break;
 721
 722                 // Get the properties
 723                 properties =  MLT_FRAME_PROPERTIES( next );
 724
 725                 // Get the speed of the frame
 726                 speed = mlt_properties_get_double( properties, "_speed" );
 727
 728                 // Get the current time
 729                 gettimeofday( &now, NULL );
 730
 731                 // Get the elapsed time
 732                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 733
 734                 // See if we have to delay the display of the current frame
 735                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 736                 {
 737                         // Obtain the scheduled playout time
 738                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 739
 740                         // Determine the difference between the elapsed time and the scheduled playout time
 741                         int64_t difference = scheduled - elapsed;
 742
 743                         // Smooth playback a bit
 744                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 745                         {
 746                                 tm.tv_sec = difference / 1000000;
 747                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 748                                 nanosleep( &tm, NULL );
 749                         }
 750
 751                         // Show current frame if not too old
 752                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 753                                 consumer_play_video( this, next );
 754
 755                         // If the queue is empty, recalculate start to allow build up again
 756                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 757                         {
 758                                 gettimeofday( &now, NULL );
 759                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 760                         }
 761                 }
 762                 else
 763                 {
 764                         mlt_log_debug( MLT_CONSUMER_SERVICE(&this->parent), "dropped video frame\n" );
 765                 }
 766
 767                 // This frame can now be closed
 768                 mlt_frame_close( next );
 769                 next = NULL;
 770         }
 771
 772         if ( next != NULL )
 773                 mlt_frame_close( next );
 774
 775         mlt_consumer_stopped( &this->parent );
 776
 777         return NULL;
 778 }
 779
 780 /** Threaded wrapper for pipe.
 781 */
 782
 783 static void *consumer_thread( void *arg )
 784 {
 785         // Identify the arg
 786         consumer_sdl this = arg;
 787
 788         // Get the consumer
 789         mlt_consumer consumer = &this->parent;
 790
 791         // Convenience functionality
 792         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 793         int terminated = 0;
 794
 795         // Video thread
 796         pthread_t thread;
 797
 798         // internal intialization
 799         int init_audio = 1;
 800         int init_video = 1;
 801         mlt_frame frame = NULL;
 802         mlt_properties properties = NULL;
 803         int duration = 0;
 804         int64_t playtime = 0;
 805         struct timespec tm = { 0, 100000 };
 806
 807         // Loop until told not to
 808         while( !terminated && this->running )
 809         {
 810                 // Get a frame from the attached producer
 811                 frame = mlt_consumer_rt_frame( consumer );
 812
 813                 // Check for termination
 814                 if ( terminate_on_pause && frame != NULL )
 815                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 816
 817                 // Ensure that we have a frame
 818                 if ( frame != NULL )
 819                 {
 820                         // Get the frame properties
 821                         properties =  MLT_FRAME_PROPERTIES( frame );
 822
 823                         // Play audio
 824                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 825
 826                         // Determine the start time now
 827                         if ( this->playing && init_video )
 828                         {
 829                                 // Create the video thread
 830                                 pthread_create( &thread, NULL, video_thread, this );
 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( properties, "playtime", playtime );
 838
 839                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 840                                 nanosleep( &tm, NULL );
 841
 842                         // Push this frame to the back of the queue
 843                         pthread_mutex_lock( &this->video_mutex );
 844                         mlt_deque_push_back( this->queue, frame );
 845                         pthread_cond_broadcast( &this->video_cond );
 846                         pthread_mutex_unlock( &this->video_mutex );
 847
 848                         // Calculate the next playtime
 849                         playtime += ( duration * 1000 );
 850                 }
 851         }
 852
 853         this->running = 0;
 854
 855         // Kill the video thread
 856         if ( init_video == 0 )
 857         {
 858                 pthread_mutex_lock( &this->video_mutex );
 859                 pthread_cond_broadcast( &this->video_cond );
 860                 pthread_mutex_unlock( &this->video_mutex );
 861                 pthread_join( thread, NULL );
 862         }
 863
 864         while( mlt_deque_count( this->queue ) )
 865                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 866
 867         this->sdl_screen = NULL;
 868         this->audio_avail = 0;
 869
 870         return NULL;
 871 }
 872
 873 static int consumer_get_dimensions( int *width, int *height )
 874 {
 875         int changed = 0;
 876
 877         // SDL windows manager structure
 878         SDL_SysWMinfo wm;
 879
 880         // Specify the SDL Version
 881         SDL_VERSION( &wm.version );
 882
 883         // Lock the display
 884         //sdl_lock_display();
 885
 886 #ifndef __DARWIN__
 887         // Get the wm structure
 888         if ( SDL_GetWMInfo( &wm ) == 1 )
 889         {
 890                 // Check that we have the X11 wm
 891                 if ( wm.subsystem == SDL_SYSWM_X11 )
 892                 {
 893                         // Get the SDL window
 894                         Window window = wm.info.x11.window;
 895
 896                         // Get the display session
 897                         Display *display = wm.info.x11.display;
 898
 899                         // Get the window attributes
 900                         XWindowAttributes attr;
 901                         XGetWindowAttributes( display, window, &attr );
 902
 903                         // Determine whether window has changed
 904                         changed = *width != attr.width || *height != attr.height;
 905
 906                         // Return width and height
 907                         *width = attr.width;
 908                         *height = attr.height;
 909                 }
 910         }
 911 #endif
 912
 913         // Unlock the display
 914         //sdl_unlock_display();
 915
 916         return changed;
 917 }
 918
 919 /** Callback to allow override of the close method.
 920 */
 921
 922 static void consumer_close( mlt_consumer parent )
 923 {
 924         // Get the actual object
 925         consumer_sdl this = parent->child;
 926
 927         // Stop the consumer
 928         ///mlt_consumer_stop( parent );
 929
 930         // Now clean up the rest
 931         mlt_consumer_close( parent );
 932
 933         // Close the queue
 934         mlt_deque_close( this->queue );
 935
 936         // Destroy mutexes
 937         pthread_mutex_destroy( &this->audio_mutex );
 938         pthread_cond_destroy( &this->audio_cond );
 939
 940         // Finally clean up this
 941         free( this );
 942 }