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

   1 /*
   2  * consumer_sdl.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2003-2004, 2010 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt_consumer.h>
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <framework/mlt_factory.h>
  25 #include <framework/mlt_filter.h>
  26 #include <framework/mlt_log.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <pthread.h>
  31 #include <SDL.h>
  32 #include <SDL_syswm.h>
  33 #include <sys/time.h>
  34 #include "consumer_sdl_osx.h"
  35
  36 extern pthread_mutex_t mlt_sdl_mutex;
  37
  38 /** This classes definition.
  39 */
  40
  41 typedef struct consumer_sdl_s *consumer_sdl;
  42
  43 struct consumer_sdl_s
  44 {
  45         struct mlt_consumer_s parent;
  46         mlt_properties properties;
  47         mlt_deque queue;
  48         pthread_t thread;
  49         int joined;
  50         int running;
  51         uint8_t audio_buffer[ 4096 * 10 ];
  52         int audio_avail;
  53         pthread_mutex_t audio_mutex;
  54         pthread_cond_t audio_cond;
  55         pthread_mutex_t video_mutex;
  56         pthread_cond_t video_cond;
  57         int window_width;
  58         int window_height;
  59         int previous_width;
  60         int previous_height;
  61         int width;
  62         int height;
  63         int playing;
  64         int sdl_flags;
  65         SDL_Surface *sdl_screen;
  66         SDL_Overlay *sdl_overlay;
  67         SDL_Rect rect;
  68         uint8_t *buffer;
  69         int bpp;
  70 };
  71
  72 /** Forward references to static functions.
  73 */
  74
  75 static int consumer_start( mlt_consumer parent );
  76 static int consumer_stop( mlt_consumer parent );
  77 static int consumer_is_stopped( mlt_consumer parent );
  78 static void consumer_close( mlt_consumer parent );
  79 static void *consumer_thread( void * );
  80 static int consumer_get_dimensions( int *width, int *height );
  81 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  82
  83 /** This is what will be called by the factory - anything can be passed in
  84         via the argument, but keep it simple.
  85 */
  86
  87 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  88 {
  89         // Create the consumer object
  90         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  91
  92         // If no malloc'd and consumer init ok
  93         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  94         {
  95                 // Create the queue
  96                 this->queue = mlt_deque_init( );
  97
  98                 // Get the parent consumer object
  99                 mlt_consumer parent = &this->parent;
 100
 101                 // We have stuff to clean up, so override the close method
 102                 parent->close = consumer_close;
 103
 104                 // get a handle on properties
 105                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 106                 this->properties = MLT_SERVICE_PROPERTIES( service );
 107
 108                 // Set the default volume
 109                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 110
 111                 // This is the initialisation of the consumer
 112                 pthread_mutex_init( &this->audio_mutex, NULL );
 113                 pthread_cond_init( &this->audio_cond, NULL);
 114                 pthread_mutex_init( &this->video_mutex, NULL );
 115                 pthread_cond_init( &this->video_cond, NULL);
 116
 117                 // Default scaler (for now we'll use nearest)
 118                 mlt_properties_set( this->properties, "rescale", "nearest" );
 119                 mlt_properties_set( this->properties, "deinterlace_method", "onefield" );
 120
 121                 // Default buffer for low latency
 122                 mlt_properties_set_int( this->properties, "buffer", 1 );
 123
 124                 // Default audio buffer
 125                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 126
 127                 // Ensure we don't join on a non-running object
 128                 this->joined = 1;
 129
 130                 // process actual param
 131                 if ( arg && sscanf( arg, "%dx%d", &this->width, &this->height ) )
 132                 {
 133                         mlt_properties_set_int( this->properties, "_arg_size", 1 );
 134                 }
 135                 else
 136                 {
 137                         this->width = mlt_properties_get_int( this->properties, "width" );
 138                         this->height = mlt_properties_get_int( this->properties, "height" );
 139                 }
 140
 141                 // Set the sdl flags
 142                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 143
 144                 // Allow thread to be started/stopped
 145                 parent->start = consumer_start;
 146                 parent->stop = consumer_stop;
 147                 parent->is_stopped = consumer_is_stopped;
 148
 149                 // Register specific events
 150                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 151
 152                 // Return the consumer produced
 153                 return parent;
 154         }
 155
 156         // malloc or consumer init failed
 157         free( this );
 158
 159         // Indicate failure
 160         return NULL;
 161 }
 162
 163 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 164 {
 165         if ( listener != NULL )
 166                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 167 }
 168
 169 int consumer_start( mlt_consumer parent )
 170 {
 171         consumer_sdl this = parent->child;
 172
 173         if ( !this->running )
 174         {
 175                 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
 176                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 177                 int display_off = video_off | preview_off;
 178                 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
 179                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 180
 181                 consumer_stop( parent );
 182
 183                 this->running = 1;
 184                 this->joined = 0;
 185
 186                 if ( ! mlt_properties_get_int( this->properties, "_arg_size" ) )
 187                 {
 188                         if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 189                                 this->width = mlt_properties_get_int( this->properties, "width" );
 190                         if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 191                                 this->height = mlt_properties_get_int( this->properties, "height" );
 192                 }
 193
 194                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 195
 196                 if ( sdl_started == 0 && display_off == 0 )
 197                 {
 198                         pthread_mutex_lock( &mlt_sdl_mutex );
 199                         int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 200                         pthread_mutex_unlock( &mlt_sdl_mutex );
 201                         if ( ret < 0 )
 202                         {
 203                                 mlt_log_error( MLT_CONSUMER_SERVICE(parent), "Failed to initialize SDL: %s\n", SDL_GetError() );
 204                                 return -1;
 205                         }
 206
 207                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 208                         SDL_EnableUNICODE( 1 );
 209                 }
 210                 else if ( display_off == 0 )
 211                 {
 212                         pthread_mutex_lock( &mlt_sdl_mutex );
 213                         this->sdl_screen = SDL_GetVideoSurface( );
 214                         pthread_mutex_unlock( &mlt_sdl_mutex );
 215                 }
 216
 217                 if ( audio_off == 0 )
 218                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 219
 220                 // Default window size
 221                 if ( mlt_properties_get_int( this->properties, "_arg_size" ) )
 222                 {
 223                         this->window_width = this->width;
 224                         this->window_height = this->height;
 225                 }
 226                 else
 227                 {
 228                         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 229                         this->window_width = ( double )this->height * display_ratio;
 230                         this->window_height = this->height;
 231                 }
 232
 233                 if ( this->sdl_screen == NULL && display_off == 0 )
 234                 {
 235                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 236                         {
 237                                 const SDL_VideoInfo *vi;
 238                                 pthread_mutex_lock( &mlt_sdl_mutex );
 239                                 vi = SDL_GetVideoInfo();
 240                                 pthread_mutex_unlock( &mlt_sdl_mutex );
 241                                 this->window_width = vi->current_w;
 242                                 this->window_height = vi->current_h;
 243                                 this->sdl_flags |= SDL_FULLSCREEN;
 244                                 SDL_ShowCursor( SDL_DISABLE );
 245                         }
 246                         pthread_mutex_lock( &mlt_sdl_mutex );
 247                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 248                         pthread_mutex_unlock( &mlt_sdl_mutex );
 249                 }
 250
 251                 pthread_create( &this->thread, NULL, consumer_thread, this );
 252         }
 253
 254         return 0;
 255 }
 256
 257 int consumer_stop( mlt_consumer parent )
 258 {
 259         // Get the actual object
 260         consumer_sdl this = parent->child;
 261
 262         if ( this->joined == 0 )
 263         {
 264                 // Kill the thread and clean up
 265                 this->joined = 1;
 266                 this->running = 0;
 267                 if ( this->thread )
 268                         pthread_join( this->thread, NULL );
 269
 270                 // internal cleanup
 271                 if ( this->sdl_overlay != NULL )
 272                         SDL_FreeYUVOverlay( this->sdl_overlay );
 273                 this->sdl_overlay = NULL;
 274
 275                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 276                 {
 277                         pthread_mutex_lock( &this->audio_mutex );
 278                         pthread_cond_broadcast( &this->audio_cond );
 279                         pthread_mutex_unlock( &this->audio_mutex );
 280                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 281                 }
 282
 283                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 284                 {
 285                         pthread_mutex_lock( &mlt_sdl_mutex );
 286                         SDL_Quit( );
 287                         pthread_mutex_unlock( &mlt_sdl_mutex );
 288                 }
 289
 290                 this->sdl_screen = NULL;
 291         }
 292
 293         return 0;
 294 }
 295
 296 int consumer_is_stopped( mlt_consumer parent )
 297 {
 298         consumer_sdl this = parent->child;
 299         return !this->running;
 300 }
 301
 302 static int sdl_lock_display( )
 303 {
 304         pthread_mutex_lock( &mlt_sdl_mutex );
 305         SDL_Surface *screen = SDL_GetVideoSurface( );
 306         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 307         pthread_mutex_unlock( &mlt_sdl_mutex );
 308         return result;
 309 }
 310
 311 static void sdl_unlock_display( )
 312 {
 313         pthread_mutex_lock( &mlt_sdl_mutex );
 314         SDL_Surface *screen = SDL_GetVideoSurface( );
 315         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 316                 SDL_UnlockSurface( screen );
 317         pthread_mutex_unlock( &mlt_sdl_mutex );
 318 }
 319
 320 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 321 {
 322         consumer_sdl this = udata;
 323
 324         // Get the volume
 325         double volume = mlt_properties_get_double( this->properties, "volume" );
 326
 327         pthread_mutex_lock( &this->audio_mutex );
 328
 329         // Block until audio received
 330         while ( this->running && len > this->audio_avail )
 331                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 332
 333         if ( this->audio_avail >= len )
 334         {
 335                 // Place in the audio buffer
 336                 if ( volume != 1.0 )
 337                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 338                 else
 339                         memcpy( stream, this->audio_buffer, len );
 340
 341                 // Remove len from the audio available
 342                 this->audio_avail -= len;
 343
 344                 // Remove the samples
 345                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 346         }
 347         else
 348         {
 349                 // Just to be safe, wipe the stream first
 350                 memset( stream, 0, len );
 351
 352                 // Mix the audio
 353                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 354
 355                 // No audio left
 356                 this->audio_avail = 0;
 357         }
 358
 359         // We're definitely playing now
 360         this->playing = 1;
 361
 362         pthread_cond_broadcast( &this->audio_cond );
 363         pthread_mutex_unlock( &this->audio_mutex );
 364 }
 365
 366 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 367 {
 368         // Get the properties of this consumer
 369         mlt_properties properties = this->properties;
 370         mlt_audio_format afmt = mlt_audio_s16;
 371
 372         // Set the preferred params of the test card signal
 373         int channels = mlt_properties_get_int( properties, "channels" );
 374         int dest_channels = channels;
 375         int frequency = mlt_properties_get_int( properties, "frequency" );
 376         static int counter = 0;
 377
 378         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 379
 380         int16_t *pcm;
 381         int bytes;
 382
 383         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 384         *duration = ( ( samples * 1000 ) / frequency );
 385         pcm += mlt_properties_get_int( properties, "audio_offset" );
 386
 387         if ( mlt_properties_get_int( properties, "audio_off" ) )
 388         {
 389                 this->playing = 1;
 390                 init_audio = 1;
 391                 return init_audio;
 392         }
 393
 394         if ( init_audio == 1 )
 395         {
 396                 SDL_AudioSpec request;
 397                 SDL_AudioSpec got;
 398
 399                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 400
 401                 // specify audio format
 402                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 403                 this->playing = 0;
 404                 request.freq = frequency;
 405                 request.format = AUDIO_S16SYS;
 406                 request.channels = dest_channels;
 407                 request.samples = audio_buffer;
 408                 request.callback = sdl_fill_audio;
 409                 request.userdata = (void *)this;
 410                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 411                 {
 412                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 413                         init_audio = 2;
 414                 }
 415                 else if ( got.size != 0 )
 416                 {
 417                         SDL_PauseAudio( 0 );
 418                         init_audio = 0;
 419                 }
 420         }
 421
 422         if ( init_audio == 0 )
 423         {
 424                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 425
 426                 bytes = samples * dest_channels * sizeof(*pcm);
 427                 pthread_mutex_lock( &this->audio_mutex );
 428                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 429                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 430                 if ( this->running )
 431                 {
 432                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 433                         {
 434                                 if ( channels == dest_channels )
 435                                 {
 436                                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 437                                 }
 438                                 else
 439                                 {
 440                                         int16_t *dest = (int16_t*) &this->audio_buffer[ this->audio_avail ];
 441                                         int i = samples + 1;
 442
 443                                         while ( --i )
 444                                         {
 445                                                 memcpy( dest, pcm, dest_channels * sizeof(*pcm) );
 446                                                 pcm += channels;
 447                                                 dest += dest_channels;
 448                                         }
 449                                 }
 450                         }
 451                         else
 452                         {
 453                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 454                         }
 455                         this->audio_avail += bytes;
 456                 }
 457                 pthread_cond_broadcast( &this->audio_cond );
 458                 pthread_mutex_unlock( &this->audio_mutex );
 459         }
 460         else
 461         {
 462                 this->playing = 1;
 463         }
 464
 465         return init_audio;
 466 }
 467
 468 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 469 {
 470         // Get the properties of this consumer
 471         mlt_properties properties = this->properties;
 472
 473         mlt_image_format vfmt = mlt_image_yuv422;
 474         int width = this->width, height = this->height;
 475         uint8_t *image;
 476         int changed = 0;
 477
 478         int video_off = mlt_properties_get_int( properties, "video_off" );
 479         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 480         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 481         int display_off = video_off | preview_off;
 482
 483         if ( this->running && display_off == 0 )
 484         {
 485                 // Get the image, width and height
 486                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 487                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 488
 489                 void *pool = mlt_cocoa_autorelease_init();
 490
 491                 // Handle events
 492                 if ( this->sdl_screen != NULL )
 493                 {
 494                         SDL_Event event;
 495
 496                         sdl_lock_display( );
 497                         pthread_mutex_lock( &mlt_sdl_mutex );
 498                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 499                         pthread_mutex_unlock( &mlt_sdl_mutex );
 500                         sdl_unlock_display( );
 501
 502                         while ( SDL_PollEvent( &event ) )
 503                         {
 504                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 505
 506                                 switch( event.type )
 507                                 {
 508                                         case SDL_VIDEORESIZE:
 509                                                 this->window_width = event.resize.w;
 510                                                 this->window_height = event.resize.h;
 511                                                 changed = 1;
 512                                                 break;
 513                                         case SDL_QUIT:
 514                                                 this->running = 0;
 515                                                 break;
 516                                         case SDL_KEYDOWN:
 517                                                 {
 518                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 519                                                         char keyboard[ 2 ] = " ";
 520                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 521                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 522                                                         {
 523                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 524                                                                 callback( producer, keyboard );
 525                                                         }
 526                                                 }
 527                                                 break;
 528                                 }
 529                         }
 530                 }
 531
 532                 sdl_lock_display();
 533
 534                 if ( width != this->width || height != this->height )
 535                 {
 536                         if ( this->sdl_overlay != NULL )
 537                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 538                         this->sdl_overlay = NULL;
 539                 }
 540
 541                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 542                 {
 543                         // Force an overlay recreation
 544                         if ( this->sdl_overlay != NULL )
 545                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 546                         this->sdl_overlay = NULL;
 547
 548                         // open SDL window with video overlay, if possible
 549                         pthread_mutex_lock( &mlt_sdl_mutex );
 550                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 551                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 552                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 553                         pthread_mutex_unlock( &mlt_sdl_mutex );
 554
 555                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 556                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 557                         SDL_Flip( this->sdl_screen );
 558                 }
 559
 560                 if ( this->running )
 561                 {
 562                         // Determine window's new display aspect ratio
 563                         double this_aspect = ( double )this->window_width / this->window_height;
 564
 565                         // Get the display aspect ratio
 566                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 567
 568                         // Determine frame's display aspect ratio
 569                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 570
 571                         // Store the width and height received
 572                         this->width = width;
 573                         this->height = height;
 574
 575                         // If using hardware scaler
 576                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 577                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 578                         {
 579                                 // Use hardware scaler to normalise display aspect ratio
 580                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 581                                 this->rect.h = this->window_height;
 582                                 if ( this->rect.w > this->window_width )
 583                                 {
 584                                         this->rect.w = this->window_width;
 585                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 586                                 }
 587                         }
 588                         // Special case optimisation to negate odd effect of sample aspect ratio
 589                         // not corresponding exactly with image resolution.
 590                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 591                         {
 592                                 this->rect.w = this->window_width;
 593                                 this->rect.h = this->window_height;
 594                         }
 595                         // Use hardware scaler to normalise sample aspect ratio
 596                         else if ( this->window_height * display_ratio > this->window_width )
 597                         {
 598                                 this->rect.w = this->window_width;
 599                                 this->rect.h = this->window_width / display_ratio;
 600                         }
 601                         else
 602                         {
 603                                 this->rect.w = this->window_height * display_ratio;
 604                                 this->rect.h = this->window_height;
 605                         }
 606
 607                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 608                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 609                         this->rect.x -= this->rect.x % 2;
 610
 611                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 612                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 613                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 614                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 615
 616                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 617                 }
 618
 619                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 620                 {
 621                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 622                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 623                 }
 624
 625                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 626                 {
 627                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 628                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 629                         {
 630                                 if ( image != NULL )
 631                                         memcpy( this->buffer, image, width * height * 2 );
 632                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 633                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 634                         }
 635                 }
 636
 637                 sdl_unlock_display();
 638                 mlt_cocoa_autorelease_close( pool );
 639                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 640         }
 641         else if ( this->running )
 642         {
 643                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 644                 if ( !video_off )
 645                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 646                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 647                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 648         }
 649
 650         return 0;
 651 }
 652
 653 static void *video_thread( void *arg )
 654 {
 655         // Identify the arg
 656         consumer_sdl this = arg;
 657
 658         // Obtain time of thread start
 659         struct timeval now;
 660         int64_t start = 0;
 661         int64_t elapsed = 0;
 662         struct timespec tm;
 663         mlt_frame next = NULL;
 664         mlt_properties properties = NULL;
 665         double speed = 0;
 666
 667         // Get real time flag
 668         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 669
 670         // Get the current time
 671         gettimeofday( &now, NULL );
 672
 673         // Determine start time
 674         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 675
 676         while ( this->running )
 677         {
 678                 // Pop the next frame
 679                 pthread_mutex_lock( &this->video_mutex );
 680                 next = mlt_deque_pop_front( this->queue );
 681                 while ( next == NULL && this->running )
 682                 {
 683                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 684                         next = mlt_deque_pop_front( this->queue );
 685                 }
 686                 pthread_mutex_unlock( &this->video_mutex );
 687
 688                 if ( !this->running || next == NULL ) break;
 689
 690                 // Get the properties
 691                 properties =  MLT_FRAME_PROPERTIES( next );
 692
 693                 // Get the speed of the frame
 694                 speed = mlt_properties_get_double( properties, "_speed" );
 695
 696                 // Get the current time
 697                 gettimeofday( &now, NULL );
 698
 699                 // Get the elapsed time
 700                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 701
 702                 // See if we have to delay the display of the current frame
 703                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 704                 {
 705                         // Obtain the scheduled playout time
 706                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 707
 708                         // Determine the difference between the elapsed time and the scheduled playout time
 709                         int64_t difference = scheduled - elapsed;
 710
 711                         // Smooth playback a bit
 712                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 713                         {
 714                                 tm.tv_sec = difference / 1000000;
 715                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 716                                 nanosleep( &tm, NULL );
 717                         }
 718
 719                         // Show current frame if not too old
 720                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 721                                 consumer_play_video( this, next );
 722
 723                         // If the queue is empty, recalculate start to allow build up again
 724                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 725                         {
 726                                 gettimeofday( &now, NULL );
 727                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 728                         }
 729                 }
 730                 else
 731                 {
 732                         mlt_log_debug( MLT_CONSUMER_SERVICE(&this->parent), "dropped video frame\n" );
 733                 }
 734
 735                 // This frame can now be closed
 736                 mlt_frame_close( next );
 737                 next = NULL;
 738         }
 739
 740         if ( next != NULL )
 741                 mlt_frame_close( next );
 742
 743         mlt_consumer_stopped( &this->parent );
 744
 745         return NULL;
 746 }
 747
 748 /** Threaded wrapper for pipe.
 749 */
 750
 751 static void *consumer_thread( void *arg )
 752 {
 753         // Identify the arg
 754         consumer_sdl this = arg;
 755
 756         // Get the consumer
 757         mlt_consumer consumer = &this->parent;
 758
 759         // Convenience functionality
 760         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 761         int terminated = 0;
 762
 763         // Video thread
 764         pthread_t thread;
 765
 766         // internal intialization
 767         int init_audio = 1;
 768         int init_video = 1;
 769         mlt_frame frame = NULL;
 770         mlt_properties properties = NULL;
 771         int duration = 0;
 772         int64_t playtime = 0;
 773         struct timespec tm = { 0, 100000 };
 774
 775         // Loop until told not to
 776         while( !terminated && this->running )
 777         {
 778                 // Get a frame from the attached producer
 779                 frame = mlt_consumer_rt_frame( consumer );
 780
 781                 // Check for termination
 782                 if ( terminate_on_pause && frame != NULL )
 783                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 784
 785                 // Ensure that we have a frame
 786                 if ( frame != NULL )
 787                 {
 788                         // Get the frame properties
 789                         properties =  MLT_FRAME_PROPERTIES( frame );
 790
 791                         // Play audio
 792                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 793
 794                         // Determine the start time now
 795                         if ( this->playing && init_video )
 796                         {
 797                                 // Create the video thread
 798                                 pthread_create( &thread, NULL, video_thread, this );
 799
 800                                 // Video doesn't need to be initialised any more
 801                                 init_video = 0;
 802                         }
 803
 804                         // Set playtime for this frame
 805                         mlt_properties_set_int( properties, "playtime", playtime );
 806
 807                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 808                                 nanosleep( &tm, NULL );
 809
 810                         // Push this frame to the back of the queue
 811                         pthread_mutex_lock( &this->video_mutex );
 812                         mlt_deque_push_back( this->queue, frame );
 813                         pthread_cond_broadcast( &this->video_cond );
 814                         pthread_mutex_unlock( &this->video_mutex );
 815
 816                         // Calculate the next playtime
 817                         playtime += ( duration * 1000 );
 818                 }
 819         }
 820
 821         this->running = 0;
 822
 823         // Kill the video thread
 824         if ( init_video == 0 )
 825         {
 826                 pthread_mutex_lock( &this->video_mutex );
 827                 pthread_cond_broadcast( &this->video_cond );
 828                 pthread_mutex_unlock( &this->video_mutex );
 829                 pthread_join( thread, NULL );
 830         }
 831
 832         while( mlt_deque_count( this->queue ) )
 833                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 834
 835         this->sdl_screen = NULL;
 836         this->audio_avail = 0;
 837
 838         return NULL;
 839 }
 840
 841 static int consumer_get_dimensions( int *width, int *height )
 842 {
 843         int changed = 0;
 844
 845         // SDL windows manager structure
 846         SDL_SysWMinfo wm;
 847
 848         // Specify the SDL Version
 849         SDL_VERSION( &wm.version );
 850
 851         // Lock the display
 852         //sdl_lock_display();
 853
 854 #ifndef __DARWIN__
 855         // Get the wm structure
 856         if ( SDL_GetWMInfo( &wm ) == 1 )
 857         {
 858                 // Check that we have the X11 wm
 859                 if ( wm.subsystem == SDL_SYSWM_X11 )
 860                 {
 861                         // Get the SDL window
 862                         Window window = wm.info.x11.window;
 863
 864                         // Get the display session
 865                         Display *display = wm.info.x11.display;
 866
 867                         // Get the window attributes
 868                         XWindowAttributes attr;
 869                         XGetWindowAttributes( display, window, &attr );
 870
 871                         // Determine whether window has changed
 872                         changed = *width != attr.width || *height != attr.height;
 873
 874                         // Return width and height
 875                         *width = attr.width;
 876                         *height = attr.height;
 877                 }
 878         }
 879 #endif
 880
 881         // Unlock the display
 882         //sdl_unlock_display();
 883
 884         return changed;
 885 }
 886
 887 /** Callback to allow override of the close method.
 888 */
 889
 890 static void consumer_close( mlt_consumer parent )
 891 {
 892         // Get the actual object
 893         consumer_sdl this = parent->child;
 894
 895         // Stop the consumer
 896         ///mlt_consumer_stop( parent );
 897
 898         // Now clean up the rest
 899         mlt_consumer_close( parent );
 900
 901         // Close the queue
 902         mlt_deque_close( this->queue );
 903
 904         // Destroy mutexes
 905         pthread_mutex_destroy( &this->audio_mutex );
 906         pthread_cond_destroy( &this->audio_cond );
 907
 908         // Finally clean up this
 909         free( this );
 910 }