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