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", 2048 );
 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_DOUBLEBUF;
 143 #if !defined(__DARWIN__)
 144                 this->sdl_flags |= SDL_RESIZABLE;
 145 #endif
 146                 // Allow thread to be started/stopped
 147                 parent->start = consumer_start;
 148                 parent->stop = consumer_stop;
 149                 parent->is_stopped = consumer_is_stopped;
 150
 151                 // Register specific events
 152                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 153
 154                 // Return the consumer produced
 155                 return parent;
 156         }
 157
 158         // malloc or consumer init failed
 159         free( this );
 160
 161         // Indicate failure
 162         return NULL;
 163 }
 164
 165 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 166 {
 167         if ( listener != NULL )
 168                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 169 }
 170
 171 int consumer_start( mlt_consumer parent )
 172 {
 173         consumer_sdl this = parent->child;
 174
 175         if ( !this->running )
 176         {
 177                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 178                 int video_off = mlt_properties_get_int( properties, "video_off" );
 179                 int preview_off = mlt_properties_get_int( properties, "preview_off" );
 180                 int display_off = video_off | preview_off;
 181                 int audio_off = mlt_properties_get_int( properties, "audio_off" );
 182                 int sdl_started = mlt_properties_get_int( properties, "sdl_started" );
 183                 char *output_display = mlt_properties_get( properties, "output_display" );
 184                 char *window_id = mlt_properties_get( properties, "window_id" );
 185                 char *audio_driver = mlt_properties_get( properties, "audio_driver" );
 186                 char *video_driver = mlt_properties_get( properties, "video_driver" );
 187                 char *audio_device = mlt_properties_get( properties, "audio_device" );
 188
 189                 consumer_stop( parent );
 190
 191                 this->running = 1;
 192                 this->joined = 0;
 193
 194                 if ( output_display != NULL )
 195                         setenv( "DISPLAY", output_display, 1 );
 196
 197                 if ( window_id != NULL )
 198                         setenv( "SDL_WINDOWID", window_id, 1 );
 199
 200                 if ( video_driver != NULL )
 201                         setenv( "SDL_VIDEODRIVER", video_driver, 1 );
 202
 203                 if ( audio_driver != NULL )
 204                         setenv( "SDL_AUDIODRIVER", audio_driver, 1 );
 205
 206                 if ( audio_device != NULL )
 207                         setenv( "AUDIODEV", audio_device, 1 );
 208
 209                 if ( ! mlt_properties_get_int( this->properties, "_arg_size" ) )
 210                 {
 211                         if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 212                                 this->width = mlt_properties_get_int( this->properties, "width" );
 213                         if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 214                                 this->height = mlt_properties_get_int( this->properties, "height" );
 215                 }
 216
 217                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 218
 219                 if ( sdl_started == 0 && display_off == 0 )
 220                 {
 221                         pthread_mutex_lock( &mlt_sdl_mutex );
 222                         int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 223                         pthread_mutex_unlock( &mlt_sdl_mutex );
 224                         if ( ret < 0 )
 225                         {
 226                                 mlt_log_error( MLT_CONSUMER_SERVICE(parent), "Failed to initialize SDL: %s\n", SDL_GetError() );
 227                                 return -1;
 228                         }
 229
 230                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 231                         SDL_EnableUNICODE( 1 );
 232                 }
 233                 else if ( display_off == 0 )
 234                 {
 235                         pthread_mutex_lock( &mlt_sdl_mutex );
 236                         this->sdl_screen = SDL_GetVideoSurface( );
 237                         pthread_mutex_unlock( &mlt_sdl_mutex );
 238                 }
 239
 240                 if ( audio_off == 0 )
 241                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 242
 243                 // Default window size
 244                 if ( mlt_properties_get_int( this->properties, "_arg_size" ) )
 245                 {
 246                         this->window_width = this->width;
 247                         this->window_height = this->height;
 248                 }
 249                 else
 250                 {
 251                         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 252                         this->window_width = ( double )this->height * display_ratio + 0.5;
 253                         this->window_height = this->height;
 254                 }
 255
 256                 if ( this->sdl_screen == NULL && display_off == 0 )
 257                 {
 258                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 259                         {
 260                                 const SDL_VideoInfo *vi;
 261                                 pthread_mutex_lock( &mlt_sdl_mutex );
 262                                 vi = SDL_GetVideoInfo();
 263                                 pthread_mutex_unlock( &mlt_sdl_mutex );
 264                                 this->window_width = vi->current_w;
 265                                 this->window_height = vi->current_h;
 266                                 this->sdl_flags |= SDL_FULLSCREEN;
 267                                 SDL_ShowCursor( SDL_DISABLE );
 268                         }
 269                         pthread_mutex_lock( &mlt_sdl_mutex );
 270                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 271                         pthread_mutex_unlock( &mlt_sdl_mutex );
 272                 }
 273
 274                 pthread_create( &this->thread, NULL, consumer_thread, this );
 275         }
 276
 277         return 0;
 278 }
 279
 280 int consumer_stop( mlt_consumer parent )
 281 {
 282         // Get the actual object
 283         consumer_sdl this = parent->child;
 284
 285         if ( this->joined == 0 )
 286         {
 287                 // Kill the thread and clean up
 288                 this->joined = 1;
 289                 this->running = 0;
 290 #ifndef WIN32
 291                 if ( this->thread )
 292 #endif
 293                         pthread_join( this->thread, NULL );
 294
 295                 // internal cleanup
 296                 if ( this->sdl_overlay != NULL )
 297                         SDL_FreeYUVOverlay( this->sdl_overlay );
 298                 this->sdl_overlay = NULL;
 299
 300                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 301                 {
 302                         pthread_mutex_lock( &this->audio_mutex );
 303                         pthread_cond_broadcast( &this->audio_cond );
 304                         pthread_mutex_unlock( &this->audio_mutex );
 305                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 306                 }
 307
 308                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 309                 {
 310                         pthread_mutex_lock( &mlt_sdl_mutex );
 311                         SDL_Quit( );
 312                         pthread_mutex_unlock( &mlt_sdl_mutex );
 313                 }
 314
 315                 this->sdl_screen = NULL;
 316         }
 317
 318         return 0;
 319 }
 320
 321 int consumer_is_stopped( mlt_consumer parent )
 322 {
 323         consumer_sdl this = parent->child;
 324         return !this->running;
 325 }
 326
 327 static int sdl_lock_display( )
 328 {
 329         pthread_mutex_lock( &mlt_sdl_mutex );
 330         SDL_Surface *screen = SDL_GetVideoSurface( );
 331         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 332         pthread_mutex_unlock( &mlt_sdl_mutex );
 333         return result;
 334 }
 335
 336 static void sdl_unlock_display( )
 337 {
 338         pthread_mutex_lock( &mlt_sdl_mutex );
 339         SDL_Surface *screen = SDL_GetVideoSurface( );
 340         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 341                 SDL_UnlockSurface( screen );
 342         pthread_mutex_unlock( &mlt_sdl_mutex );
 343 }
 344
 345 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 346 {
 347         consumer_sdl this = udata;
 348
 349         // Get the volume
 350         double volume = mlt_properties_get_double( this->properties, "volume" );
 351
 352         pthread_mutex_lock( &this->audio_mutex );
 353
 354         // Block until audio received
 355         while ( this->running && len > this->audio_avail )
 356                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 357
 358         if ( this->audio_avail >= len )
 359         {
 360                 // Place in the audio buffer
 361                 if ( volume != 1.0 )
 362                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 363                 else
 364                         memcpy( stream, this->audio_buffer, len );
 365
 366                 // Remove len from the audio available
 367                 this->audio_avail -= len;
 368
 369                 // Remove the samples
 370                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 371         }
 372         else
 373         {
 374                 // Just to be safe, wipe the stream first
 375                 memset( stream, 0, len );
 376
 377                 // Mix the audio
 378                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 379
 380                 // No audio left
 381                 this->audio_avail = 0;
 382         }
 383
 384         // We're definitely playing now
 385         this->playing = 1;
 386
 387         pthread_cond_broadcast( &this->audio_cond );
 388         pthread_mutex_unlock( &this->audio_mutex );
 389 }
 390
 391 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 392 {
 393         // Get the properties of this consumer
 394         mlt_properties properties = this->properties;
 395         mlt_audio_format afmt = mlt_audio_s16;
 396
 397         // Set the preferred params of the test card signal
 398         int channels = mlt_properties_get_int( properties, "channels" );
 399         int dest_channels = channels;
 400         int frequency = mlt_properties_get_int( properties, "frequency" );
 401         static int counter = 0;
 402
 403         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 404
 405         int16_t *pcm;
 406         int bytes;
 407
 408         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 409         *duration = ( ( samples * 1000 ) / frequency );
 410         pcm += mlt_properties_get_int( properties, "audio_offset" );
 411
 412         if ( mlt_properties_get_int( properties, "audio_off" ) )
 413         {
 414                 this->playing = 1;
 415                 init_audio = 1;
 416                 return init_audio;
 417         }
 418
 419         if ( init_audio == 1 )
 420         {
 421                 SDL_AudioSpec request;
 422                 SDL_AudioSpec got;
 423
 424                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 425
 426                 // specify audio format
 427                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 428                 this->playing = 0;
 429                 request.freq = frequency;
 430                 request.format = AUDIO_S16SYS;
 431                 request.channels = dest_channels;
 432                 request.samples = audio_buffer;
 433                 request.callback = sdl_fill_audio;
 434                 request.userdata = (void *)this;
 435                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 436                 {
 437                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 438                         init_audio = 2;
 439                 }
 440                 else if ( got.size != 0 )
 441                 {
 442                         SDL_PauseAudio( 0 );
 443                         init_audio = 0;
 444                 }
 445         }
 446
 447         if ( init_audio == 0 )
 448         {
 449                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 450
 451                 bytes = samples * dest_channels * sizeof(*pcm);
 452                 pthread_mutex_lock( &this->audio_mutex );
 453                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 454                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 455                 if ( this->running )
 456                 {
 457                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 458                         {
 459                                 if ( channels == dest_channels )
 460                                 {
 461                                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 462                                 }
 463                                 else
 464                                 {
 465                                         int16_t *dest = (int16_t*) &this->audio_buffer[ this->audio_avail ];
 466                                         int i = samples + 1;
 467
 468                                         while ( --i )
 469                                         {
 470                                                 memcpy( dest, pcm, dest_channels * sizeof(*pcm) );
 471                                                 pcm += channels;
 472                                                 dest += dest_channels;
 473                                         }
 474                                 }
 475                         }
 476                         else
 477                         {
 478                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 479                         }
 480                         this->audio_avail += bytes;
 481                 }
 482                 pthread_cond_broadcast( &this->audio_cond );
 483                 pthread_mutex_unlock( &this->audio_mutex );
 484         }
 485         else
 486         {
 487                 this->playing = 1;
 488         }
 489
 490         return init_audio;
 491 }
 492
 493 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 494 {
 495         // Get the properties of this consumer
 496         mlt_properties properties = this->properties;
 497
 498         mlt_image_format vfmt = mlt_image_yuv422;
 499         int width = this->width, height = this->height;
 500         uint8_t *image;
 501         int changed = 0;
 502
 503         int video_off = mlt_properties_get_int( properties, "video_off" );
 504         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 505         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 506         int display_off = video_off | preview_off;
 507
 508         if ( this->running && display_off == 0 )
 509         {
 510                 // Get the image, width and height
 511                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 512
 513                 void *pool = mlt_cocoa_autorelease_init();
 514
 515                 // Handle events
 516                 if ( this->sdl_screen != NULL )
 517                 {
 518                         SDL_Event event;
 519
 520                         sdl_lock_display( );
 521                         pthread_mutex_lock( &mlt_sdl_mutex );
 522                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 523                         pthread_mutex_unlock( &mlt_sdl_mutex );
 524                         sdl_unlock_display( );
 525
 526                         while ( SDL_PollEvent( &event ) )
 527                         {
 528                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 529
 530                                 switch( event.type )
 531                                 {
 532                                         case SDL_VIDEORESIZE:
 533                                                 this->window_width = event.resize.w;
 534                                                 this->window_height = event.resize.h;
 535                                                 changed = 1;
 536                                                 break;
 537                                         case SDL_QUIT:
 538                                                 this->running = 0;
 539                                                 break;
 540                                         case SDL_KEYDOWN:
 541                                                 {
 542                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 543                                                         char keyboard[ 2 ] = " ";
 544                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 545                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 546                                                         {
 547                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 548                                                                 callback( producer, keyboard );
 549                                                         }
 550                                                 }
 551                                                 break;
 552                                 }
 553                         }
 554                 }
 555
 556                 sdl_lock_display();
 557
 558                 if ( width != this->width || height != this->height )
 559                 {
 560                         if ( this->sdl_overlay != NULL )
 561                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 562                         this->sdl_overlay = NULL;
 563                 }
 564
 565                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 566                 {
 567                         // Force an overlay recreation
 568                         if ( this->sdl_overlay != NULL )
 569                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 570                         this->sdl_overlay = NULL;
 571
 572                         // open SDL window with video overlay, if possible
 573                         pthread_mutex_lock( &mlt_sdl_mutex );
 574                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 575                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 576                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 577                         pthread_mutex_unlock( &mlt_sdl_mutex );
 578
 579                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 580                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 581                         SDL_Flip( this->sdl_screen );
 582                 }
 583
 584                 if ( this->running )
 585                 {
 586                         // Determine window's new display aspect ratio
 587                         double this_aspect = ( double )this->window_width / this->window_height;
 588
 589                         // Get the display aspect ratio
 590                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 591
 592                         // Determine frame's display aspect ratio
 593                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 594
 595                         // Store the width and height received
 596                         this->width = width;
 597                         this->height = height;
 598
 599                         // If using hardware scaler
 600                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 601                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 602                         {
 603                                 // Use hardware scaler to normalise display aspect ratio
 604                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 605                                 this->rect.h = this->window_height;
 606                                 if ( this->rect.w > this->window_width )
 607                                 {
 608                                         this->rect.w = this->window_width;
 609                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 610                                 }
 611                         }
 612                         // Special case optimisation to negate odd effect of sample aspect ratio
 613                         // not corresponding exactly with image resolution.
 614                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 615                         {
 616                                 this->rect.w = this->window_width;
 617                                 this->rect.h = this->window_height;
 618                         }
 619                         // Use hardware scaler to normalise sample aspect ratio
 620                         else if ( this->window_height * display_ratio > this->window_width )
 621                         {
 622                                 this->rect.w = this->window_width;
 623                                 this->rect.h = this->window_width / display_ratio;
 624                         }
 625                         else
 626                         {
 627                                 this->rect.w = this->window_height * display_ratio;
 628                                 this->rect.h = this->window_height;
 629                         }
 630
 631                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 632                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 633                         this->rect.x -= this->rect.x % 2;
 634
 635                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 636                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 637                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 638                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 639
 640                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 641                 }
 642
 643                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 644                 {
 645                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 646                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 647                 }
 648
 649                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 650                 {
 651                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 652                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 653                         {
 654                                 if ( image != NULL )
 655                                         memcpy( this->buffer, image, width * height * 2 );
 656                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 657                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 658                         }
 659                 }
 660
 661                 sdl_unlock_display();
 662                 mlt_cocoa_autorelease_close( pool );
 663                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 664         }
 665         else if ( this->running )
 666         {
 667                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 668                 if ( !video_off )
 669                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 670                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 671         }
 672
 673         return 0;
 674 }
 675
 676 static void *video_thread( void *arg )
 677 {
 678         // Identify the arg
 679         consumer_sdl this = arg;
 680
 681         // Obtain time of thread start
 682         struct timeval now;
 683         int64_t start = 0;
 684         int64_t elapsed = 0;
 685         struct timespec tm;
 686         mlt_frame next = NULL;
 687         mlt_properties properties = NULL;
 688         double speed = 0;
 689
 690         // Get real time flag
 691         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 692
 693         // Get the current time
 694         gettimeofday( &now, NULL );
 695
 696         // Determine start time
 697         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 698
 699         while ( this->running )
 700         {
 701                 // Pop the next frame
 702                 pthread_mutex_lock( &this->video_mutex );
 703                 next = mlt_deque_pop_front( this->queue );
 704                 while ( next == NULL && this->running )
 705                 {
 706                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 707                         next = mlt_deque_pop_front( this->queue );
 708                 }
 709                 pthread_mutex_unlock( &this->video_mutex );
 710
 711                 if ( !this->running || next == NULL ) break;
 712
 713                 // Get the properties
 714                 properties =  MLT_FRAME_PROPERTIES( next );
 715
 716                 // Get the speed of the frame
 717                 speed = mlt_properties_get_double( properties, "_speed" );
 718
 719                 // Get the current time
 720                 gettimeofday( &now, NULL );
 721
 722                 // Get the elapsed time
 723                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 724
 725                 // See if we have to delay the display of the current frame
 726                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 727                 {
 728                         // Obtain the scheduled playout time
 729                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 730
 731                         // Determine the difference between the elapsed time and the scheduled playout time
 732                         int64_t difference = scheduled - elapsed;
 733
 734                         // Smooth playback a bit
 735                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 736                         {
 737                                 tm.tv_sec = difference / 1000000;
 738                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 739                                 nanosleep( &tm, NULL );
 740                         }
 741
 742                         // Show current frame if not too old
 743                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 744                                 consumer_play_video( this, next );
 745
 746                         // If the queue is empty, recalculate start to allow build up again
 747                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 748                         {
 749                                 gettimeofday( &now, NULL );
 750                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 751                         }
 752                 }
 753                 else
 754                 {
 755                         static int dropped = 0;
 756                         mlt_log_info( MLT_CONSUMER_SERVICE(&this->parent), "dropped video frame %d\n", ++dropped );
 757                 }
 758
 759                 // This frame can now be closed
 760                 mlt_frame_close( next );
 761                 next = NULL;
 762         }
 763
 764         if ( next != NULL )
 765                 mlt_frame_close( next );
 766
 767         mlt_consumer_stopped( &this->parent );
 768
 769         return NULL;
 770 }
 771
 772 /** Threaded wrapper for pipe.
 773 */
 774
 775 static void *consumer_thread( void *arg )
 776 {
 777         // Identify the arg
 778         consumer_sdl this = arg;
 779
 780         // Get the consumer
 781         mlt_consumer consumer = &this->parent;
 782
 783         // Convenience functionality
 784         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 785         int terminated = 0;
 786
 787         // Video thread
 788         pthread_t thread;
 789
 790         // internal intialization
 791         int init_audio = 1;
 792         int init_video = 1;
 793         mlt_frame frame = NULL;
 794         int duration = 0;
 795         int64_t playtime = 0;
 796         struct timespec tm = { 0, 100000 };
 797
 798         // Loop until told not to
 799         while( this->running )
 800         {
 801                 // Get a frame from the attached producer
 802                 frame = !terminated? mlt_consumer_rt_frame( consumer ) : NULL;
 803
 804                 // Check for termination
 805                 if ( terminate_on_pause && frame )
 806                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 807
 808                 // Ensure that we have a frame
 809                 if ( frame )
 810                 {
 811                         // Play audio
 812                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 813
 814                         // Determine the start time now
 815                         if ( this->playing && init_video )
 816                         {
 817                                 // Create the video thread
 818                                 pthread_create( &thread, NULL, video_thread, this );
 819
 820                                 // Video doesn't need to be initialised any more
 821                                 init_video = 0;
 822                         }
 823
 824                         // Set playtime for this frame
 825                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "playtime", playtime );
 826
 827                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 828                                 nanosleep( &tm, NULL );
 829
 830                         // Push this frame to the back of the queue
 831                         pthread_mutex_lock( &this->video_mutex );
 832                         mlt_deque_push_back( this->queue, frame );
 833                         pthread_cond_broadcast( &this->video_cond );
 834                         pthread_mutex_unlock( &this->video_mutex );
 835
 836                         // Calculate the next playtime
 837                         playtime += ( duration * 1000 );
 838                 }
 839                 else if ( terminated )
 840                 {
 841                         if ( init_video || mlt_deque_count( this->queue ) == 0 )
 842                                 break;
 843                         else
 844                                 nanosleep( &tm, NULL );
 845                 }
 846         }
 847
 848         this->running = 0;
 849
 850         // Unblock sdl_preview
 851         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "put_mode" ) == 1 )
 852         {
 853                 frame = mlt_consumer_get_frame( consumer );
 854                 if ( frame )
 855                         mlt_frame_close( frame );
 856                 frame = NULL;
 857         }
 858
 859         // Kill the video thread
 860         if ( init_video == 0 )
 861         {
 862                 pthread_mutex_lock( &this->video_mutex );
 863                 pthread_cond_broadcast( &this->video_cond );
 864                 pthread_mutex_unlock( &this->video_mutex );
 865                 pthread_join( thread, NULL );
 866         }
 867
 868         while( mlt_deque_count( this->queue ) )
 869                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 870
 871         this->sdl_screen = NULL;
 872         this->audio_avail = 0;
 873
 874         return NULL;
 875 }
 876
 877 static int consumer_get_dimensions( int *width, int *height )
 878 {
 879         int changed = 0;
 880
 881         // SDL windows manager structure
 882         SDL_SysWMinfo wm;
 883
 884         // Specify the SDL Version
 885         SDL_VERSION( &wm.version );
 886
 887         // Lock the display
 888         //sdl_lock_display();
 889
 890 #ifndef __DARWIN__
 891         // Get the wm structure
 892         if ( SDL_GetWMInfo( &wm ) == 1 )
 893         {
 894 #ifndef WIN32
 895                 // Check that we have the X11 wm
 896                 if ( wm.subsystem == SDL_SYSWM_X11 )
 897                 {
 898                         // Get the SDL window
 899                         Window window = wm.info.x11.window;
 900
 901                         // Get the display session
 902                         Display *display = wm.info.x11.display;
 903
 904                         // Get the window attributes
 905                         XWindowAttributes attr;
 906                         XGetWindowAttributes( display, window, &attr );
 907
 908                         // Determine whether window has changed
 909                         changed = *width != attr.width || *height != attr.height;
 910
 911                         // Return width and height
 912                         *width = attr.width;
 913                         *height = attr.height;
 914                 }
 915 #endif
 916         }
 917 #endif
 918
 919         // Unlock the display
 920         //sdl_unlock_display();
 921
 922         return changed;
 923 }
 924
 925 /** Callback to allow override of the close method.
 926 */
 927
 928 static void consumer_close( mlt_consumer parent )
 929 {
 930         // Get the actual object
 931         consumer_sdl this = parent->child;
 932
 933         // Stop the consumer
 934         ///mlt_consumer_stop( parent );
 935
 936         // Now clean up the rest
 937         mlt_consumer_close( parent );
 938
 939         // Close the queue
 940         mlt_deque_close( this->queue );
 941
 942         // Destroy mutexes
 943         pthread_mutex_destroy( &this->audio_mutex );
 944         pthread_cond_destroy( &this->audio_cond );
 945
 946         // Finally clean up this
 947         free( this );
 948 }