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 == 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                         pthread_mutex_lock( &mlt_sdl_mutex );
 192                         int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 193                         pthread_mutex_unlock( &mlt_sdl_mutex );
 194                         if ( ret < 0 )
 195                         {
 196                                 mlt_log_error( MLT_CONSUMER_SERVICE(parent), "Failed to initialize SDL: %s\n", SDL_GetError() );
 197                                 return -1;
 198                         }
 199
 200                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 201                         SDL_EnableUNICODE( 1 );
 202                 }
 203                 else if ( display_off == 0 )
 204                 {
 205                         pthread_mutex_lock( &mlt_sdl_mutex );
 206                         this->sdl_screen = SDL_GetVideoSurface( );
 207                         pthread_mutex_unlock( &mlt_sdl_mutex );
 208                 }
 209
 210                 if ( audio_off == 0 )
 211                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 212
 213                 // Default window size
 214                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 215                 this->window_width = ( double )this->height * display_ratio;
 216                 this->window_height = this->height;
 217
 218                 if ( this->sdl_screen == NULL && display_off == 0 )
 219                 {
 220                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 221                         {
 222                                 const SDL_VideoInfo *vi;
 223                                 pthread_mutex_lock( &mlt_sdl_mutex );
 224                                 vi = SDL_GetVideoInfo();
 225                                 pthread_mutex_unlock( &mlt_sdl_mutex );
 226                                 this->window_width = vi->current_w;
 227                                 this->window_height = vi->current_h;
 228                                 this->sdl_flags |= SDL_FULLSCREEN;
 229                                 SDL_ShowCursor( SDL_DISABLE );
 230                         }
 231                         pthread_mutex_lock( &mlt_sdl_mutex );
 232                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 233                         pthread_mutex_unlock( &mlt_sdl_mutex );
 234                 }
 235
 236                 pthread_create( &this->thread, NULL, consumer_thread, this );
 237         }
 238
 239         return 0;
 240 }
 241
 242 int consumer_stop( mlt_consumer parent )
 243 {
 244         // Get the actual object
 245         consumer_sdl this = parent->child;
 246
 247         if ( this->joined == 0 )
 248         {
 249                 // Kill the thread and clean up
 250                 this->joined = 1;
 251                 this->running = 0;
 252                 if ( this->thread )
 253                         pthread_join( this->thread, NULL );
 254
 255                 // internal cleanup
 256                 if ( this->sdl_overlay != NULL )
 257                         SDL_FreeYUVOverlay( this->sdl_overlay );
 258                 this->sdl_overlay = NULL;
 259
 260                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 261                 {
 262                         pthread_mutex_lock( &this->audio_mutex );
 263                         pthread_cond_broadcast( &this->audio_cond );
 264                         pthread_mutex_unlock( &this->audio_mutex );
 265                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 266                 }
 267
 268                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 269                 {
 270                         pthread_mutex_lock( &mlt_sdl_mutex );
 271                         SDL_Quit( );
 272                         pthread_mutex_unlock( &mlt_sdl_mutex );
 273                 }
 274
 275                 this->sdl_screen = NULL;
 276         }
 277
 278         return 0;
 279 }
 280
 281 int consumer_is_stopped( mlt_consumer parent )
 282 {
 283         consumer_sdl this = parent->child;
 284         return !this->running;
 285 }
 286
 287 static int sdl_lock_display( )
 288 {
 289         pthread_mutex_lock( &mlt_sdl_mutex );
 290         SDL_Surface *screen = SDL_GetVideoSurface( );
 291         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 292         pthread_mutex_unlock( &mlt_sdl_mutex );
 293         return result;
 294 }
 295
 296 static void sdl_unlock_display( )
 297 {
 298         pthread_mutex_lock( &mlt_sdl_mutex );
 299         SDL_Surface *screen = SDL_GetVideoSurface( );
 300         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 301                 SDL_UnlockSurface( screen );
 302         pthread_mutex_unlock( &mlt_sdl_mutex );
 303 }
 304
 305 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 306 {
 307         consumer_sdl this = udata;
 308
 309         // Get the volume
 310         double volume = mlt_properties_get_double( this->properties, "volume" );
 311
 312         pthread_mutex_lock( &this->audio_mutex );
 313
 314         // Block until audio received
 315         while ( this->running && len > this->audio_avail )
 316                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 317
 318         if ( this->audio_avail >= len )
 319         {
 320                 // Place in the audio buffer
 321                 if ( volume != 1.0 )
 322                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 323                 else
 324                         memcpy( stream, this->audio_buffer, len );
 325
 326                 // Remove len from the audio available
 327                 this->audio_avail -= len;
 328
 329                 // Remove the samples
 330                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 331         }
 332         else
 333         {
 334                 // Just to be safe, wipe the stream first
 335                 memset( stream, 0, len );
 336
 337                 // Mix the audio
 338                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 339
 340                 // No audio left
 341                 this->audio_avail = 0;
 342         }
 343
 344         // We're definitely playing now
 345         this->playing = 1;
 346
 347         pthread_cond_broadcast( &this->audio_cond );
 348         pthread_mutex_unlock( &this->audio_mutex );
 349 }
 350
 351 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 352 {
 353         // Get the properties of this consumer
 354         mlt_properties properties = this->properties;
 355         mlt_audio_format afmt = mlt_audio_s16;
 356
 357         // Set the preferred params of the test card signal
 358         int channels = mlt_properties_get_int( properties, "channels" );
 359         int dest_channels = channels;
 360         int frequency = mlt_properties_get_int( properties, "frequency" );
 361         static int counter = 0;
 362
 363         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 364
 365         int16_t *pcm;
 366         int bytes;
 367
 368         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 369         *duration = ( ( samples * 1000 ) / frequency );
 370         pcm += mlt_properties_get_int( properties, "audio_offset" );
 371
 372         if ( mlt_properties_get_int( properties, "audio_off" ) )
 373         {
 374                 this->playing = 1;
 375                 init_audio = 1;
 376                 return init_audio;
 377         }
 378
 379         if ( init_audio == 1 )
 380         {
 381                 SDL_AudioSpec request;
 382                 SDL_AudioSpec got;
 383
 384                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 385
 386                 // specify audio format
 387                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 388                 this->playing = 0;
 389                 request.freq = frequency;
 390                 request.format = AUDIO_S16SYS;
 391                 request.channels = dest_channels;
 392                 request.samples = audio_buffer;
 393                 request.callback = sdl_fill_audio;
 394                 request.userdata = (void *)this;
 395                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 396                 {
 397                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 398                         init_audio = 2;
 399                 }
 400                 else if ( got.size != 0 )
 401                 {
 402                         SDL_PauseAudio( 0 );
 403                         init_audio = 0;
 404                 }
 405         }
 406
 407         if ( init_audio == 0 )
 408         {
 409                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 410
 411                 bytes = samples * dest_channels * sizeof(*pcm);
 412                 pthread_mutex_lock( &this->audio_mutex );
 413                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 414                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 415                 if ( this->running )
 416                 {
 417                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 418                         {
 419                                 if ( channels == dest_channels )
 420                                 {
 421                                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 422                                 }
 423                                 else
 424                                 {
 425                                         int16_t *dest = (int16_t*) &this->audio_buffer[ this->audio_avail ];
 426                                         int i = samples + 1;
 427
 428                                         while ( --i )
 429                                         {
 430                                                 memcpy( dest, pcm, dest_channels * sizeof(*pcm) );
 431                                                 pcm += channels;
 432                                                 dest += dest_channels;
 433                                         }
 434                                 }
 435                         }
 436                         else
 437                         {
 438                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 439                         }
 440                         this->audio_avail += bytes;
 441                 }
 442                 pthread_cond_broadcast( &this->audio_cond );
 443                 pthread_mutex_unlock( &this->audio_mutex );
 444         }
 445         else
 446         {
 447                 this->playing = 1;
 448         }
 449
 450         return init_audio;
 451 }
 452
 453 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 454 {
 455         // Get the properties of this consumer
 456         mlt_properties properties = this->properties;
 457
 458         mlt_image_format vfmt = mlt_image_yuv422;
 459         int width = this->width, height = this->height;
 460         uint8_t *image;
 461         int changed = 0;
 462
 463         int video_off = mlt_properties_get_int( properties, "video_off" );
 464         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 465         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 466         int display_off = video_off | preview_off;
 467
 468         if ( this->running && display_off == 0 )
 469         {
 470                 // Get the image, width and height
 471                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 472                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 473
 474                 void *pool = mlt_cocoa_autorelease_init();
 475
 476                 // Handle events
 477                 if ( this->sdl_screen != NULL )
 478                 {
 479                         SDL_Event event;
 480
 481                         sdl_lock_display( );
 482                         pthread_mutex_lock( &mlt_sdl_mutex );
 483                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 484                         pthread_mutex_unlock( &mlt_sdl_mutex );
 485                         sdl_unlock_display( );
 486
 487                         while ( SDL_PollEvent( &event ) )
 488                         {
 489                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 490
 491                                 switch( event.type )
 492                                 {
 493                                         case SDL_VIDEORESIZE:
 494                                                 this->window_width = event.resize.w;
 495                                                 this->window_height = event.resize.h;
 496                                                 changed = 1;
 497                                                 break;
 498                                         case SDL_QUIT:
 499                                                 this->running = 0;
 500                                                 break;
 501                                         case SDL_KEYDOWN:
 502                                                 {
 503                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 504                                                         char keyboard[ 2 ] = " ";
 505                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 506                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 507                                                         {
 508                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 509                                                                 callback( producer, keyboard );
 510                                                         }
 511                                                 }
 512                                                 break;
 513                                 }
 514                         }
 515                 }
 516
 517                 sdl_lock_display();
 518
 519                 if ( width != this->width || height != this->height )
 520                 {
 521                         if ( this->sdl_overlay != NULL )
 522                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 523                         this->sdl_overlay = NULL;
 524                 }
 525
 526                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 527                 {
 528                         // Force an overlay recreation
 529                         if ( this->sdl_overlay != NULL )
 530                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 531                         this->sdl_overlay = NULL;
 532
 533                         // open SDL window with video overlay, if possible
 534                         pthread_mutex_lock( &mlt_sdl_mutex );
 535                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 536                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 537                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 538                         pthread_mutex_unlock( &mlt_sdl_mutex );
 539
 540                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 541                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 542                         SDL_Flip( this->sdl_screen );
 543                 }
 544
 545                 if ( this->running )
 546                 {
 547                         // Determine window's new display aspect ratio
 548                         double this_aspect = ( double )this->window_width / this->window_height;
 549
 550                         // Get the display aspect ratio
 551                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 552
 553                         // Determine frame's display aspect ratio
 554                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 555
 556                         // Store the width and height received
 557                         this->width = width;
 558                         this->height = height;
 559
 560                         // If using hardware scaler
 561                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 562                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 563                         {
 564                                 // Use hardware scaler to normalise display aspect ratio
 565                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 566                                 this->rect.h = this->window_height;
 567                                 if ( this->rect.w > this->window_width )
 568                                 {
 569                                         this->rect.w = this->window_width;
 570                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 571                                 }
 572                         }
 573                         // Special case optimisation to negate odd effect of sample aspect ratio
 574                         // not corresponding exactly with image resolution.
 575                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 576                         {
 577                                 this->rect.w = this->window_width;
 578                                 this->rect.h = this->window_height;
 579                         }
 580                         // Use hardware scaler to normalise sample aspect ratio
 581                         else if ( this->window_height * display_ratio > this->window_width )
 582                         {
 583                                 this->rect.w = this->window_width;
 584                                 this->rect.h = this->window_width / display_ratio;
 585                         }
 586                         else
 587                         {
 588                                 this->rect.w = this->window_height * display_ratio;
 589                                 this->rect.h = this->window_height;
 590                         }
 591
 592                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 593                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 594                         this->rect.x -= this->rect.x % 2;
 595
 596                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 597                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 598                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 599                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 600
 601                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 602                 }
 603
 604                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 605                 {
 606                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 607                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 608                 }
 609
 610                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 611                 {
 612                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 613                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 614                         {
 615                                 if ( image != NULL )
 616                                         memcpy( this->buffer, image, width * height * 2 );
 617                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 618                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 619                         }
 620                 }
 621
 622                 sdl_unlock_display();
 623                 mlt_cocoa_autorelease_close( pool );
 624                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 625         }
 626         else if ( this->running )
 627         {
 628                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 629                 if ( !video_off )
 630                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 631                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 632                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 633         }
 634
 635         return 0;
 636 }
 637
 638 static void *video_thread( void *arg )
 639 {
 640         // Identify the arg
 641         consumer_sdl this = arg;
 642
 643         // Obtain time of thread start
 644         struct timeval now;
 645         int64_t start = 0;
 646         int64_t elapsed = 0;
 647         struct timespec tm;
 648         mlt_frame next = NULL;
 649         mlt_properties properties = NULL;
 650         double speed = 0;
 651
 652         // Get real time flag
 653         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 654
 655         // Get the current time
 656         gettimeofday( &now, NULL );
 657
 658         // Determine start time
 659         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 660
 661         while ( this->running )
 662         {
 663                 // Pop the next frame
 664                 pthread_mutex_lock( &this->video_mutex );
 665                 next = mlt_deque_pop_front( this->queue );
 666                 while ( next == NULL && this->running )
 667                 {
 668                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 669                         next = mlt_deque_pop_front( this->queue );
 670                 }
 671                 pthread_mutex_unlock( &this->video_mutex );
 672
 673                 if ( !this->running || next == NULL ) break;
 674
 675                 // Get the properties
 676                 properties =  MLT_FRAME_PROPERTIES( next );
 677
 678                 // Get the speed of the frame
 679                 speed = mlt_properties_get_double( properties, "_speed" );
 680
 681                 // Get the current time
 682                 gettimeofday( &now, NULL );
 683
 684                 // Get the elapsed time
 685                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 686
 687                 // See if we have to delay the display of the current frame
 688                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 689                 {
 690                         // Obtain the scheduled playout time
 691                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 692
 693                         // Determine the difference between the elapsed time and the scheduled playout time
 694                         int64_t difference = scheduled - elapsed;
 695
 696                         // Smooth playback a bit
 697                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 698                         {
 699                                 tm.tv_sec = difference / 1000000;
 700                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 701                                 nanosleep( &tm, NULL );
 702                         }
 703
 704                         // Show current frame if not too old
 705                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 706                                 consumer_play_video( this, next );
 707
 708                         // If the queue is empty, recalculate start to allow build up again
 709                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 710                         {
 711                                 gettimeofday( &now, NULL );
 712                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 713                         }
 714                 }
 715                 else
 716                 {
 717                         mlt_log_debug( MLT_CONSUMER_SERVICE(&this->parent), "dropped video frame\n" );
 718                 }
 719
 720                 // This frame can now be closed
 721                 mlt_frame_close( next );
 722                 next = NULL;
 723         }
 724
 725         if ( next != NULL )
 726                 mlt_frame_close( next );
 727
 728         mlt_consumer_stopped( &this->parent );
 729
 730         return NULL;
 731 }
 732
 733 /** Threaded wrapper for pipe.
 734 */
 735
 736 static void *consumer_thread( void *arg )
 737 {
 738         // Identify the arg
 739         consumer_sdl this = arg;
 740
 741         // Get the consumer
 742         mlt_consumer consumer = &this->parent;
 743
 744         // Convenience functionality
 745         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 746         int terminated = 0;
 747
 748         // Video thread
 749         pthread_t thread;
 750
 751         // internal intialization
 752         int init_audio = 1;
 753         int init_video = 1;
 754         mlt_frame frame = NULL;
 755         mlt_properties properties = NULL;
 756         int duration = 0;
 757         int64_t playtime = 0;
 758         struct timespec tm = { 0, 100000 };
 759
 760         // Loop until told not to
 761         while( !terminated && this->running )
 762         {
 763                 // Get a frame from the attached producer
 764                 frame = mlt_consumer_rt_frame( consumer );
 765
 766                 // Check for termination
 767                 if ( terminate_on_pause && frame != NULL )
 768                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 769
 770                 // Ensure that we have a frame
 771                 if ( frame != NULL )
 772                 {
 773                         // Get the frame properties
 774                         properties =  MLT_FRAME_PROPERTIES( frame );
 775
 776                         // Play audio
 777                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 778
 779                         // Determine the start time now
 780                         if ( this->playing && init_video )
 781                         {
 782                                 // Create the video thread
 783                                 pthread_create( &thread, NULL, video_thread, this );
 784
 785                                 // Video doesn't need to be initialised any more
 786                                 init_video = 0;
 787                         }
 788
 789                         // Set playtime for this frame
 790                         mlt_properties_set_int( properties, "playtime", playtime );
 791
 792                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 793                                 nanosleep( &tm, NULL );
 794
 795                         // Push this frame to the back of the queue
 796                         pthread_mutex_lock( &this->video_mutex );
 797                         mlt_deque_push_back( this->queue, frame );
 798                         pthread_cond_broadcast( &this->video_cond );
 799                         pthread_mutex_unlock( &this->video_mutex );
 800
 801                         // Calculate the next playtime
 802                         playtime += ( duration * 1000 );
 803                 }
 804         }
 805
 806         this->running = 0;
 807
 808         // Kill the video thread
 809         if ( init_video == 0 )
 810         {
 811                 pthread_mutex_lock( &this->video_mutex );
 812                 pthread_cond_broadcast( &this->video_cond );
 813                 pthread_mutex_unlock( &this->video_mutex );
 814                 pthread_join( thread, NULL );
 815         }
 816
 817         while( mlt_deque_count( this->queue ) )
 818                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 819
 820         this->sdl_screen = NULL;
 821         this->audio_avail = 0;
 822
 823         return NULL;
 824 }
 825
 826 static int consumer_get_dimensions( int *width, int *height )
 827 {
 828         int changed = 0;
 829
 830         // SDL windows manager structure
 831         SDL_SysWMinfo wm;
 832
 833         // Specify the SDL Version
 834         SDL_VERSION( &wm.version );
 835
 836         // Lock the display
 837         //sdl_lock_display();
 838
 839 #ifndef __DARWIN__
 840         // Get the wm structure
 841         if ( SDL_GetWMInfo( &wm ) == 1 )
 842         {
 843                 // Check that we have the X11 wm
 844                 if ( wm.subsystem == SDL_SYSWM_X11 )
 845                 {
 846                         // Get the SDL window
 847                         Window window = wm.info.x11.window;
 848
 849                         // Get the display session
 850                         Display *display = wm.info.x11.display;
 851
 852                         // Get the window attributes
 853                         XWindowAttributes attr;
 854                         XGetWindowAttributes( display, window, &attr );
 855
 856                         // Determine whether window has changed
 857                         changed = *width != attr.width || *height != attr.height;
 858
 859                         // Return width and height
 860                         *width = attr.width;
 861                         *height = attr.height;
 862                 }
 863         }
 864 #endif
 865
 866         // Unlock the display
 867         //sdl_unlock_display();
 868
 869         return changed;
 870 }
 871
 872 /** Callback to allow override of the close method.
 873 */
 874
 875 static void consumer_close( mlt_consumer parent )
 876 {
 877         // Get the actual object
 878         consumer_sdl this = parent->child;
 879
 880         // Stop the consumer
 881         ///mlt_consumer_stop( parent );
 882
 883         // Now clean up the rest
 884         mlt_consumer_close( parent );
 885
 886         // Close the queue
 887         mlt_deque_close( this->queue );
 888
 889         // Destroy mutexes
 890         pthread_mutex_destroy( &this->audio_mutex );
 891         pthread_cond_destroy( &this->audio_cond );
 892
 893         // Finally clean up this
 894         free( this );
 895 }