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