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         int bpp;
  69 };
  70
  71 /** Forward references to static functions.
  72 */
  73
  74 static int consumer_start( mlt_consumer parent );
  75 static int consumer_stop( mlt_consumer parent );
  76 static int consumer_is_stopped( mlt_consumer parent );
  77 static void consumer_close( mlt_consumer parent );
  78 static void *consumer_thread( void * );
  79 static int consumer_get_dimensions( int *width, int *height );
  80 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  81
  82 /** This is what will be called by the factory - anything can be passed in
  83         via the argument, but keep it simple.
  84 */
  85
  86 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  87 {
  88         // Create the consumer object
  89         consumer_sdl this = calloc( 1, sizeof( struct consumer_sdl_s ) );
  90
  91         // If no malloc'd and consumer init ok
  92         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  93         {
  94                 // Create the queue
  95                 this->queue = mlt_deque_init( );
  96
  97                 // Get the parent consumer object
  98                 mlt_consumer parent = &this->parent;
  99
 100                 // We have stuff to clean up, so override the close method
 101                 parent->close = consumer_close;
 102
 103                 // get a handle on properties
 104                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 105                 this->properties = MLT_SERVICE_PROPERTIES( service );
 106
 107                 // Set the default volume
 108                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 109
 110                 // This is the initialisation of the consumer
 111                 pthread_mutex_init( &this->audio_mutex, NULL );
 112                 pthread_cond_init( &this->audio_cond, NULL);
 113                 pthread_mutex_init( &this->video_mutex, NULL );
 114                 pthread_cond_init( &this->video_cond, NULL);
 115
 116                 // Default scaler (for now we'll use nearest)
 117                 mlt_properties_set( this->properties, "rescale", "nearest" );
 118                 mlt_properties_set( this->properties, "deinterlace_method", "onefield" );
 119
 120                 // Default buffer for low latency
 121                 mlt_properties_set_int( this->properties, "buffer", 1 );
 122
 123                 // Default audio buffer
 124                 mlt_properties_set_int( this->properties, "audio_buffer", 2048 );
 125
 126                 // Tell render thread we prefer yuv420p
 127                 mlt_properties_set( this->properties, "mlt_image_format", "yuv420p" );
 128
 129                 // Ensure we don't join on a non-running object
 130                 this->joined = 1;
 131
 132                 // process actual param
 133                 if ( arg && sscanf( arg, "%dx%d", &this->width, &this->height ) )
 134                 {
 135                         mlt_properties_set_int( this->properties, "_arg_size", 1 );
 136                 }
 137                 else
 138                 {
 139                         this->width = mlt_properties_get_int( this->properties, "width" );
 140                         this->height = mlt_properties_get_int( this->properties, "height" );
 141                 }
 142
 143                 // Set the sdl flags
 144                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_DOUBLEBUF;
 145 #if !defined(__DARWIN__)
 146                 this->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
 153                 // Register specific events
 154                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 155
 156                 // Return the consumer produced
 157                 return parent;
 158         }
 159
 160         // malloc or consumer init failed
 161         free( this );
 162
 163         // Indicate failure
 164         return NULL;
 165 }
 166
 167 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 168 {
 169         if ( listener != NULL )
 170                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 171 }
 172
 173 int consumer_start( mlt_consumer parent )
 174 {
 175         consumer_sdl this = parent->child;
 176
 177         if ( !this->running )
 178         {
 179                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 180                 int video_off = mlt_properties_get_int( properties, "video_off" );
 181                 int preview_off = mlt_properties_get_int( properties, "preview_off" );
 182                 int display_off = video_off | preview_off;
 183                 int audio_off = mlt_properties_get_int( properties, "audio_off" );
 184                 int sdl_started = mlt_properties_get_int( properties, "sdl_started" );
 185                 char *output_display = mlt_properties_get( properties, "output_display" );
 186                 char *window_id = mlt_properties_get( properties, "window_id" );
 187                 char *audio_driver = mlt_properties_get( properties, "audio_driver" );
 188                 char *video_driver = mlt_properties_get( properties, "video_driver" );
 189                 char *audio_device = mlt_properties_get( properties, "audio_device" );
 190
 191                 consumer_stop( parent );
 192
 193                 this->running = 1;
 194                 this->joined = 0;
 195
 196                 if ( output_display != NULL )
 197                         setenv( "DISPLAY", output_display, 1 );
 198
 199                 if ( window_id != NULL )
 200                         setenv( "SDL_WINDOWID", window_id, 1 );
 201
 202                 if ( video_driver != NULL )
 203                         setenv( "SDL_VIDEODRIVER", video_driver, 1 );
 204
 205                 if ( audio_driver != NULL )
 206                         setenv( "SDL_AUDIODRIVER", audio_driver, 1 );
 207
 208                 if ( audio_device != NULL )
 209                         setenv( "AUDIODEV", audio_device, 1 );
 210
 211                 if ( ! mlt_properties_get_int( this->properties, "_arg_size" ) )
 212                 {
 213                         if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 214                                 this->width = mlt_properties_get_int( this->properties, "width" );
 215                         if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 216                                 this->height = mlt_properties_get_int( this->properties, "height" );
 217                 }
 218
 219                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 220
 221                 if ( sdl_started == 0 && display_off == 0 )
 222                 {
 223                         pthread_mutex_lock( &mlt_sdl_mutex );
 224                         int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 225                         pthread_mutex_unlock( &mlt_sdl_mutex );
 226                         if ( ret < 0 )
 227                         {
 228                                 mlt_log_error( MLT_CONSUMER_SERVICE(parent), "Failed to initialize SDL: %s\n", SDL_GetError() );
 229                                 return -1;
 230                         }
 231
 232                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 233                         SDL_EnableUNICODE( 1 );
 234                 }
 235                 else if ( display_off == 0 )
 236                 {
 237                         pthread_mutex_lock( &mlt_sdl_mutex );
 238                         this->sdl_screen = SDL_GetVideoSurface( );
 239                         pthread_mutex_unlock( &mlt_sdl_mutex );
 240                 }
 241
 242                 if ( audio_off == 0 )
 243                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 244
 245                 // Default window size
 246                 if ( mlt_properties_get_int( this->properties, "_arg_size" ) )
 247                 {
 248                         this->window_width = this->width;
 249                         this->window_height = this->height;
 250                 }
 251                 else
 252                 {
 253                         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 254                         this->window_width = ( double )this->height * display_ratio + 0.5;
 255                         this->window_height = this->height;
 256                 }
 257
 258                 if ( this->sdl_screen == NULL && display_off == 0 )
 259                 {
 260                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 261                         {
 262                                 const SDL_VideoInfo *vi;
 263                                 pthread_mutex_lock( &mlt_sdl_mutex );
 264                                 vi = SDL_GetVideoInfo();
 265                                 pthread_mutex_unlock( &mlt_sdl_mutex );
 266                                 this->window_width = vi->current_w;
 267                                 this->window_height = vi->current_h;
 268                                 this->sdl_flags |= SDL_FULLSCREEN;
 269                                 SDL_ShowCursor( SDL_DISABLE );
 270                         }
 271                         pthread_mutex_lock( &mlt_sdl_mutex );
 272                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 273                         pthread_mutex_unlock( &mlt_sdl_mutex );
 274                 }
 275
 276                 pthread_create( &this->thread, NULL, consumer_thread, this );
 277         }
 278
 279         return 0;
 280 }
 281
 282 int consumer_stop( mlt_consumer parent )
 283 {
 284         // Get the actual object
 285         consumer_sdl this = parent->child;
 286
 287         if ( this->joined == 0 )
 288         {
 289                 // Kill the thread and clean up
 290                 this->joined = 1;
 291                 this->running = 0;
 292 #ifndef WIN32
 293                 if ( this->thread )
 294 #endif
 295                         pthread_join( this->thread, NULL );
 296
 297                 // internal cleanup
 298                 if ( this->sdl_overlay != NULL )
 299                         SDL_FreeYUVOverlay( this->sdl_overlay );
 300                 this->sdl_overlay = NULL;
 301
 302                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 303                 {
 304                         pthread_mutex_lock( &this->audio_mutex );
 305                         pthread_cond_broadcast( &this->audio_cond );
 306                         pthread_mutex_unlock( &this->audio_mutex );
 307                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 308                 }
 309
 310                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 311                 {
 312                         pthread_mutex_lock( &mlt_sdl_mutex );
 313                         SDL_Quit( );
 314                         pthread_mutex_unlock( &mlt_sdl_mutex );
 315                 }
 316
 317                 pthread_mutex_lock( &mlt_sdl_mutex );
 318                 this->sdl_screen = NULL;
 319                 pthread_mutex_unlock( &mlt_sdl_mutex );
 320         }
 321
 322         return 0;
 323 }
 324
 325 int consumer_is_stopped( mlt_consumer parent )
 326 {
 327         consumer_sdl this = parent->child;
 328         return !this->running;
 329 }
 330
 331 static int sdl_lock_display( )
 332 {
 333         pthread_mutex_lock( &mlt_sdl_mutex );
 334         SDL_Surface *screen = SDL_GetVideoSurface( );
 335         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 336         pthread_mutex_unlock( &mlt_sdl_mutex );
 337         return result;
 338 }
 339
 340 static void sdl_unlock_display( )
 341 {
 342         pthread_mutex_lock( &mlt_sdl_mutex );
 343         SDL_Surface *screen = SDL_GetVideoSurface( );
 344         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 345                 SDL_UnlockSurface( screen );
 346         pthread_mutex_unlock( &mlt_sdl_mutex );
 347 }
 348
 349 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 350 {
 351         consumer_sdl this = udata;
 352
 353         // Get the volume
 354         double volume = mlt_properties_get_double( this->properties, "volume" );
 355
 356         pthread_mutex_lock( &this->audio_mutex );
 357
 358         // Block until audio received
 359         while ( this->running && len > this->audio_avail )
 360                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 361
 362         if ( this->audio_avail >= len )
 363         {
 364                 // Place in the audio buffer
 365                 if ( volume != 1.0 )
 366                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 367                 else
 368                         memcpy( stream, this->audio_buffer, len );
 369
 370                 // Remove len from the audio available
 371                 this->audio_avail -= len;
 372
 373                 // Remove the samples
 374                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 375         }
 376         else
 377         {
 378                 // Just to be safe, wipe the stream first
 379                 memset( stream, 0, len );
 380
 381                 // Mix the audio
 382                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 383
 384                 // No audio left
 385                 this->audio_avail = 0;
 386         }
 387
 388         // We're definitely playing now
 389         this->playing = 1;
 390
 391         pthread_cond_broadcast( &this->audio_cond );
 392         pthread_mutex_unlock( &this->audio_mutex );
 393 }
 394
 395 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 396 {
 397         // Get the properties of this consumer
 398         mlt_properties properties = this->properties;
 399         mlt_audio_format afmt = mlt_audio_s16;
 400
 401         // Set the preferred params of the test card signal
 402         int channels = mlt_properties_get_int( properties, "channels" );
 403         int dest_channels = channels;
 404         int frequency = mlt_properties_get_int( properties, "frequency" );
 405         static int counter = 0;
 406
 407         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 408
 409         int16_t *pcm;
 410         int bytes;
 411
 412         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 413         *duration = ( ( samples * 1000 ) / frequency );
 414         pcm += mlt_properties_get_int( properties, "audio_offset" );
 415
 416         if ( mlt_properties_get_int( properties, "audio_off" ) )
 417         {
 418                 this->playing = 1;
 419                 init_audio = 1;
 420                 return init_audio;
 421         }
 422
 423         if ( init_audio == 1 )
 424         {
 425                 SDL_AudioSpec request;
 426                 SDL_AudioSpec got;
 427
 428                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 429
 430                 // specify audio format
 431                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 432                 this->playing = 0;
 433                 request.freq = frequency;
 434                 request.format = AUDIO_S16SYS;
 435                 request.channels = dest_channels;
 436                 request.samples = audio_buffer;
 437                 request.callback = sdl_fill_audio;
 438                 request.userdata = (void *)this;
 439                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 440                 {
 441                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 442                         init_audio = 2;
 443                 }
 444                 else if ( got.size != 0 )
 445                 {
 446                         SDL_PauseAudio( 0 );
 447                         init_audio = 0;
 448                 }
 449         }
 450
 451         if ( init_audio == 0 )
 452         {
 453                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 454
 455                 bytes = samples * dest_channels * sizeof(*pcm);
 456                 pthread_mutex_lock( &this->audio_mutex );
 457                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 458                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 459                 if ( this->running )
 460                 {
 461                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 462                         {
 463                                 if ( channels == dest_channels )
 464                                 {
 465                                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 466                                 }
 467                                 else
 468                                 {
 469                                         int16_t *dest = (int16_t*) &this->audio_buffer[ this->audio_avail ];
 470                                         int i = samples + 1;
 471
 472                                         while ( --i )
 473                                         {
 474                                                 memcpy( dest, pcm, dest_channels * sizeof(*pcm) );
 475                                                 pcm += channels;
 476                                                 dest += dest_channels;
 477                                         }
 478                                 }
 479                         }
 480                         else
 481                         {
 482                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 483                         }
 484                         this->audio_avail += bytes;
 485                 }
 486                 pthread_cond_broadcast( &this->audio_cond );
 487                 pthread_mutex_unlock( &this->audio_mutex );
 488         }
 489         else
 490         {
 491                 this->playing = 1;
 492         }
 493
 494         return init_audio;
 495 }
 496
 497 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 498 {
 499         // Get the properties of this consumer
 500         mlt_properties properties = this->properties;
 501
 502         mlt_image_format vfmt = mlt_image_yuv420p;
 503         int width = this->width, height = this->height;
 504         uint8_t *image;
 505         int changed = 0;
 506
 507         int video_off = mlt_properties_get_int( properties, "video_off" );
 508         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 509         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 510         int display_off = video_off | preview_off;
 511
 512         if ( this->running && display_off == 0 )
 513         {
 514                 // Get the image, width and height
 515                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 516
 517                 void *pool = mlt_cocoa_autorelease_init();
 518
 519                 // Handle events
 520                 if ( this->sdl_screen != NULL )
 521                 {
 522                         SDL_Event event;
 523
 524                         sdl_lock_display( );
 525                         pthread_mutex_lock( &mlt_sdl_mutex );
 526                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 527                         pthread_mutex_unlock( &mlt_sdl_mutex );
 528                         sdl_unlock_display( );
 529
 530                         while ( SDL_PollEvent( &event ) )
 531                         {
 532                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 533
 534                                 switch( event.type )
 535                                 {
 536                                         case SDL_VIDEORESIZE:
 537                                                 this->window_width = event.resize.w;
 538                                                 this->window_height = event.resize.h;
 539                                                 changed = 1;
 540                                                 break;
 541                                         case SDL_QUIT:
 542                                                 this->running = 0;
 543                                                 break;
 544                                         case SDL_KEYDOWN:
 545                                                 {
 546                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 547                                                         char keyboard[ 2 ] = " ";
 548                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 549                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 550                                                         {
 551                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 552                                                                 callback( producer, keyboard );
 553                                                         }
 554                                                 }
 555                                                 break;
 556                                 }
 557                         }
 558                 }
 559
 560                 sdl_lock_display();
 561
 562                 if ( width != this->width || height != this->height )
 563                 {
 564                         if ( this->sdl_overlay != NULL )
 565                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 566                         this->sdl_overlay = NULL;
 567                 }
 568
 569                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 570                 {
 571                         // Force an overlay recreation
 572                         if ( this->sdl_overlay != NULL )
 573                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 574                         this->sdl_overlay = NULL;
 575
 576                         // open SDL window with video overlay, if possible
 577                         pthread_mutex_lock( &mlt_sdl_mutex );
 578                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 579                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 580                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 581                         pthread_mutex_unlock( &mlt_sdl_mutex );
 582
 583                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 584                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 585                         SDL_Flip( this->sdl_screen );
 586                 }
 587
 588                 if ( this->running )
 589                 {
 590                         // Determine window's new display aspect ratio
 591                         double this_aspect = ( double )this->window_width / this->window_height;
 592
 593                         // Get the display aspect ratio
 594                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 595
 596                         // Determine frame's display aspect ratio
 597                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 598
 599                         // Store the width and height received
 600                         this->width = width;
 601                         this->height = height;
 602
 603                         // If using hardware scaler
 604                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 605                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 606                         {
 607                                 // Use hardware scaler to normalise display aspect ratio
 608                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 609                                 this->rect.h = this->window_height;
 610                                 if ( this->rect.w > this->window_width )
 611                                 {
 612                                         this->rect.w = this->window_width;
 613                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 614                                 }
 615                         }
 616                         // Special case optimisation to negate odd effect of sample aspect ratio
 617                         // not corresponding exactly with image resolution.
 618                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 619                         {
 620                                 this->rect.w = this->window_width;
 621                                 this->rect.h = this->window_height;
 622                         }
 623                         // Use hardware scaler to normalise sample aspect ratio
 624                         else if ( this->window_height * display_ratio > this->window_width )
 625                         {
 626                                 this->rect.w = this->window_width;
 627                                 this->rect.h = this->window_width / display_ratio;
 628                         }
 629                         else
 630                         {
 631                                 this->rect.w = this->window_height * display_ratio;
 632                                 this->rect.h = this->window_height;
 633                         }
 634
 635                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 636                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 637                         this->rect.x -= this->rect.x % 2;
 638
 639                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 640                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 641                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 642                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 643
 644                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 645                 }
 646
 647                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 648                 {
 649                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 650                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YV12_OVERLAY, this->sdl_screen );
 651                 }
 652
 653                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 654                 {
 655                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 656                         {
 657                                 if ( image != NULL )
 658                                 {
 659                                         int img_sz = width * height;
 660                                         int quarter_img_sz = width * height / 4;
 661                                         memcpy( this->sdl_overlay->pixels[ 0 ], image, img_sz );
 662                                         memcpy( this->sdl_overlay->pixels[ 2 ], image + img_sz, quarter_img_sz );
 663                                         memcpy( this->sdl_overlay->pixels[ 1 ], image + img_sz + quarter_img_sz, quarter_img_sz );
 664                                 }
 665                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 666                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 667                         }
 668                 }
 669
 670                 sdl_unlock_display();
 671                 mlt_cocoa_autorelease_close( pool );
 672                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 673         }
 674         else if ( this->running )
 675         {
 676                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 677                 if ( !video_off )
 678                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 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                         static int dropped = 0;
 765                         mlt_log_info( MLT_CONSUMER_SERVICE(&this->parent), "dropped video frame %d\n", ++dropped );
 766                 }
 767
 768                 // This frame can now be closed
 769                 mlt_frame_close( next );
 770                 next = NULL;
 771         }
 772
 773         if ( next != NULL )
 774                 mlt_frame_close( next );
 775
 776         mlt_consumer_stopped( &this->parent );
 777
 778         return NULL;
 779 }
 780
 781 /** Threaded wrapper for pipe.
 782 */
 783
 784 static void *consumer_thread( void *arg )
 785 {
 786         // Identify the arg
 787         consumer_sdl this = arg;
 788
 789         // Get the consumer
 790         mlt_consumer consumer = &this->parent;
 791
 792         // Convenience functionality
 793         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 794         int terminated = 0;
 795
 796         // Video thread
 797         pthread_t thread;
 798
 799         // internal intialization
 800         int init_audio = 1;
 801         int init_video = 1;
 802         mlt_frame frame = 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( this->running )
 809         {
 810                 // Get a frame from the attached producer
 811                 frame = !terminated? mlt_consumer_rt_frame( consumer ) : NULL;
 812
 813                 // Check for termination
 814                 if ( terminate_on_pause && frame )
 815                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 816
 817                 // Ensure that we have a frame
 818                 if ( frame )
 819                 {
 820                         // Play audio
 821                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 822
 823                         // Determine the start time now
 824                         if ( this->playing && init_video )
 825                         {
 826                                 // Create the video thread
 827                                 pthread_create( &thread, NULL, video_thread, this );
 828
 829                                 // Video doesn't need to be initialised any more
 830                                 init_video = 0;
 831                         }
 832
 833                         // Set playtime for this frame
 834                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "playtime", playtime );
 835
 836                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 837                                 nanosleep( &tm, NULL );
 838
 839                         // Push this frame to the back of the queue
 840                         pthread_mutex_lock( &this->video_mutex );
 841                         mlt_deque_push_back( this->queue, frame );
 842                         pthread_cond_broadcast( &this->video_cond );
 843                         pthread_mutex_unlock( &this->video_mutex );
 844
 845                         // Calculate the next playtime
 846                         playtime += ( duration * 1000 );
 847                 }
 848                 else if ( terminated )
 849                 {
 850                         if ( init_video || mlt_deque_count( this->queue ) == 0 )
 851                                 break;
 852                         else
 853                                 nanosleep( &tm, NULL );
 854                 }
 855         }
 856
 857         this->running = 0;
 858
 859         // Unblock sdl_preview
 860         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "put_mode" ) == 1 )
 861         {
 862                 frame = mlt_consumer_get_frame( consumer );
 863                 if ( frame )
 864                         mlt_frame_close( frame );
 865                 frame = NULL;
 866         }
 867
 868         // Kill the video thread
 869         if ( init_video == 0 )
 870         {
 871                 pthread_mutex_lock( &this->video_mutex );
 872                 pthread_cond_broadcast( &this->video_cond );
 873                 pthread_mutex_unlock( &this->video_mutex );
 874                 pthread_join( thread, NULL );
 875         }
 876
 877         while( mlt_deque_count( this->queue ) )
 878                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 879
 880         pthread_mutex_lock( &mlt_sdl_mutex );
 881         this->sdl_screen = NULL;
 882         pthread_mutex_unlock( &mlt_sdl_mutex );
 883         this->audio_avail = 0;
 884
 885         return NULL;
 886 }
 887
 888 static int consumer_get_dimensions( int *width, int *height )
 889 {
 890         int changed = 0;
 891
 892         // SDL windows manager structure
 893         SDL_SysWMinfo wm;
 894
 895         // Specify the SDL Version
 896         SDL_VERSION( &wm.version );
 897
 898         // Lock the display
 899         //sdl_lock_display();
 900
 901 #ifndef __DARWIN__
 902         // Get the wm structure
 903         if ( SDL_GetWMInfo( &wm ) == 1 )
 904         {
 905 #ifndef WIN32
 906                 // Check that we have the X11 wm
 907                 if ( wm.subsystem == SDL_SYSWM_X11 )
 908                 {
 909                         // Get the SDL window
 910                         Window window = wm.info.x11.window;
 911
 912                         // Get the display session
 913                         Display *display = wm.info.x11.display;
 914
 915                         // Get the window attributes
 916                         XWindowAttributes attr;
 917                         XGetWindowAttributes( display, window, &attr );
 918
 919                         // Determine whether window has changed
 920                         changed = *width != attr.width || *height != attr.height;
 921
 922                         // Return width and height
 923                         *width = attr.width;
 924                         *height = attr.height;
 925                 }
 926 #endif
 927         }
 928 #endif
 929
 930         // Unlock the display
 931         //sdl_unlock_display();
 932
 933         return changed;
 934 }
 935
 936 /** Callback to allow override of the close method.
 937 */
 938
 939 static void consumer_close( mlt_consumer parent )
 940 {
 941         // Get the actual object
 942         consumer_sdl this = parent->child;
 943
 944         // Stop the consumer
 945         ///mlt_consumer_stop( parent );
 946
 947         // Now clean up the rest
 948         mlt_consumer_close( parent );
 949
 950         // Close the queue
 951         mlt_deque_close( this->queue );
 952
 953         // Destroy mutexes
 954         pthread_mutex_destroy( &this->audio_mutex );
 955         pthread_cond_destroy( &this->audio_cond );
 956
 957         // Finally clean up this
 958         free( this );
 959 }