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

   1 /*
   2  * consumer_sdl.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program 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
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "consumer_sdl.h"
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <pthread.h>
  28 #include <SDL/SDL.h>
  29 #include <SDL/SDL_syswm.h>
  30 #include <sys/time.h>
  31
  32 #ifdef __DARWIN__
  33 #       include "consumer_sdl_osx_hack.h"
  34 #       import <AppKit/NSApplication.h>
  35 #       import <Foundation/Foundation.h>
  36 #endif
  37
  38
  39 /** This classes definition.
  40 */
  41
  42 typedef struct consumer_sdl_s *consumer_sdl;
  43
  44 struct consumer_sdl_s
  45 {
  46         struct mlt_consumer_s parent;
  47         mlt_properties properties;
  48         mlt_deque queue;
  49         pthread_t thread;
  50         int joined;
  51         int running;
  52         uint8_t audio_buffer[ 4096 * 10 ];
  53         int audio_avail;
  54         pthread_mutex_t audio_mutex;
  55         pthread_cond_t audio_cond;
  56         pthread_mutex_t video_mutex;
  57         pthread_cond_t video_cond;
  58         int window_width;
  59         int window_height;
  60         int previous_width;
  61         int previous_height;
  62         int width;
  63         int height;
  64         int playing;
  65         int sdl_flags;
  66         SDL_Surface *sdl_screen;
  67         SDL_Overlay *sdl_overlay;
  68         SDL_Rect rect;
  69         uint8_t *buffer;
  70         int bpp;
  71 };
  72
  73 /** Forward references to static functions.
  74 */
  75
  76 static int consumer_start( mlt_consumer parent );
  77 static int consumer_stop( mlt_consumer parent );
  78 static int consumer_is_stopped( mlt_consumer parent );
  79 static void consumer_close( mlt_consumer parent );
  80 static void *consumer_thread( void * );
  81 static int consumer_get_dimensions( int *width, int *height );
  82 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  83
  84 /** This is what will be called by the factory - anything can be passed in
  85         via the argument, but keep it simple.
  86 */
  87
  88 mlt_consumer consumer_sdl_init( char *arg )
  89 {
  90 #ifdef __DARWIN__
  91         // Initialize Cocoa
  92         NSApplicationLoad();
  93         [NSApplication sharedApplication];
  94
  95         // Spawn a fake thread so that cocoa knows to be multithreaded
  96         DummyThread *dummy = [[DummyThread alloc] init];
  97         [NSThread detachNewThreadSelector:@selector(startThread:) toTarget:dummy withObject:nil];
  98 #endif
  99
 100         // Create the consumer object
 101         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
 102
 103         // If no malloc'd and consumer init ok
 104         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
 105         {
 106                 // Create the queue
 107                 this->queue = mlt_deque_init( );
 108
 109                 // Get the parent consumer object
 110                 mlt_consumer parent = &this->parent;
 111
 112                 // We have stuff to clean up, so override the close method
 113                 parent->close = consumer_close;
 114
 115                 // get a handle on properties
 116                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 117                 this->properties = MLT_SERVICE_PROPERTIES( service );
 118
 119                 // Default display aspect ratio
 120                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 121
 122                 // Set the default volume
 123                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 124
 125                 // This is the initialisation of the consumer
 126                 pthread_mutex_init( &this->audio_mutex, NULL );
 127                 pthread_cond_init( &this->audio_cond, NULL);
 128                 pthread_mutex_init( &this->video_mutex, NULL );
 129                 pthread_cond_init( &this->video_cond, NULL);
 130
 131                 // Default scaler (for now we'll use nearest)
 132                 mlt_properties_set( this->properties, "rescale", "nearest" );
 133
 134                 // Default buffer for low latency
 135                 mlt_properties_set_int( this->properties, "buffer", 1 );
 136
 137                 // Default progressive true
 138                 mlt_properties_set_int( this->properties, "progressive", 0 );
 139
 140                 // Default audio buffer
 141                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 142
 143                 // Ensure we don't join on a non-running object
 144                 this->joined = 1;
 145
 146                 // process actual param
 147                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 148                 {
 149                         this->width = mlt_properties_get_int( this->properties, "width" );
 150                         this->height = mlt_properties_get_int( this->properties, "height" );
 151                 }
 152
 153                 // Default window size
 154                 this->window_width = ( double )this->height * display_ratio;
 155                 this->window_height = this->height;
 156
 157                 // Set the sdl flags
 158                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 159
 160                 // Allow thread to be started/stopped
 161                 parent->start = consumer_start;
 162                 parent->stop = consumer_stop;
 163                 parent->is_stopped = consumer_is_stopped;
 164
 165                 // Register specific events
 166                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 167
 168                 // Return the consumer produced
 169                 return parent;
 170         }
 171
 172         // malloc or consumer init failed
 173         free( this );
 174
 175         // Indicate failure
 176         return NULL;
 177 }
 178
 179 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 180 {
 181         if ( listener != NULL )
 182                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 183 }
 184
 185 int consumer_start( mlt_consumer parent )
 186 {
 187         consumer_sdl this = parent->child;
 188
 189         if ( !this->running )
 190         {
 191                 consumer_stop( parent );
 192
 193                 this->running = 1;
 194                 this->joined = 0;
 195
 196                 this->width = mlt_properties_get_int( this->properties, "width" );
 197                 this->height = mlt_properties_get_int( this->properties, "height" );
 198
 199                 pthread_create( &this->thread, NULL, consumer_thread, this );
 200         }
 201
 202         return 0;
 203 }
 204
 205 int consumer_stop( mlt_consumer parent )
 206 {
 207         // Get the actual object
 208         consumer_sdl this = parent->child;
 209
 210         if ( this->joined == 0 )
 211         {
 212                 // Kill the thread and clean up
 213                 this->joined = 1;
 214                 this->running = 0;
 215                 pthread_join( this->thread, NULL );
 216         }
 217
 218         return 0;
 219 }
 220
 221 int consumer_is_stopped( mlt_consumer parent )
 222 {
 223         consumer_sdl this = parent->child;
 224         return !this->running;
 225 }
 226
 227 static int sdl_lock_display( )
 228 {
 229         SDL_Surface *screen = SDL_GetVideoSurface( );
 230         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 231 }
 232
 233 static void sdl_unlock_display( )
 234 {
 235         SDL_Surface *screen = SDL_GetVideoSurface( );
 236         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 237                 SDL_UnlockSurface( screen );
 238 }
 239
 240 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 241 {
 242         consumer_sdl this = udata;
 243
 244         // Get the volume
 245         double volume = mlt_properties_get_double( this->properties, "volume" );
 246
 247         pthread_mutex_lock( &this->audio_mutex );
 248
 249         // Block until audio received
 250         while ( this->running && len > this->audio_avail )
 251                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 252
 253         if ( this->audio_avail >= len )
 254         {
 255                 // Place in the audio buffer
 256                 if ( volume != 1.0 )
 257                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 258                 else
 259                         memcpy( stream, this->audio_buffer, len );
 260
 261                 // Remove len from the audio available
 262                 this->audio_avail -= len;
 263
 264                 // Remove the samples
 265                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 266         }
 267         else
 268         {
 269                 // Just to be safe, wipe the stream first
 270                 memset( stream, 0, len );
 271
 272                 // Copy what we have into the stream
 273                 memcpy( stream, this->audio_buffer, this->audio_avail );
 274
 275                 // Mix the audio
 276                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 277
 278                 // No audio left
 279                 this->audio_avail = 0;
 280         }
 281
 282         // We're definitely playing now
 283         this->playing = 1;
 284
 285         pthread_cond_broadcast( &this->audio_cond );
 286         pthread_mutex_unlock( &this->audio_mutex );
 287 }
 288
 289 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 290 {
 291         // Get the properties of this consumer
 292         mlt_properties properties = this->properties;
 293         mlt_audio_format afmt = mlt_audio_pcm;
 294
 295         // Set the preferred params of the test card signal
 296         int channels = mlt_properties_get_int( properties, "channels" );
 297         int frequency = mlt_properties_get_int( properties, "frequency" );
 298         static int counter = 0;
 299
 300         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 301
 302         int16_t *pcm;
 303         int bytes;
 304
 305         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 306         *duration = ( ( samples * 1000 ) / frequency );
 307
 308         if ( mlt_properties_get_int( properties, "audio_off" ) )
 309         {
 310                 this->playing = 1;
 311                 init_audio = 1;
 312                 return init_audio;
 313         }
 314
 315         if ( init_audio == 1 )
 316         {
 317                 SDL_AudioSpec request;
 318                 SDL_AudioSpec got;
 319
 320                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 321
 322                 // specify audio format
 323                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 324                 this->playing = 0;
 325                 request.freq = frequency;
 326                 request.format = AUDIO_S16;
 327                 request.channels = channels;
 328                 request.samples = audio_buffer;
 329                 request.callback = sdl_fill_audio;
 330                 request.userdata = (void *)this;
 331                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 332                 {
 333                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 334                         init_audio = 2;
 335                 }
 336                 else if ( got.size != 0 )
 337                 {
 338                         SDL_PauseAudio( 0 );
 339                         init_audio = 0;
 340                 }
 341         }
 342
 343         if ( init_audio == 0 )
 344         {
 345                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 346                 bytes = ( samples * channels * 2 );
 347                 pthread_mutex_lock( &this->audio_mutex );
 348                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 349                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 350                 if ( this->running )
 351                 {
 352                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 353                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 354                         else
 355                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 356                         this->audio_avail += bytes;
 357                 }
 358                 pthread_cond_broadcast( &this->audio_cond );
 359                 pthread_mutex_unlock( &this->audio_mutex );
 360         }
 361         else
 362         {
 363                 this->playing = 1;
 364         }
 365
 366         return init_audio;
 367 }
 368
 369 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 370 {
 371         // Get the properties of this consumer
 372         mlt_properties properties = this->properties;
 373
 374         mlt_image_format vfmt = mlt_image_yuv422;
 375         int width = this->width, height = this->height;
 376         uint8_t *image;
 377         int changed = 0;
 378
 379         if ( this->running && mlt_properties_get_int( properties, "video_off" ) == 0 )
 380         {
 381                 // Get the image, width and height
 382                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 383                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 384
 385                 // Handle events
 386                 if ( this->sdl_screen != NULL )
 387                 {
 388                         SDL_Event event;
 389
 390                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 391
 392                         while ( SDL_PollEvent( &event ) )
 393                         {
 394                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 395
 396                                 switch( event.type )
 397                                 {
 398                                         case SDL_VIDEORESIZE:
 399                                                 this->window_width = event.resize.w;
 400                                                 this->window_height = event.resize.h;
 401                                                 changed = 1;
 402                                                 break;
 403                                         case SDL_QUIT:
 404                                                 this->running = 0;
 405                                                 break;
 406                                         case SDL_KEYDOWN:
 407                                                 {
 408                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 409                                                         char keyboard[ 2 ] = " ";
 410                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 411                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 412                                                         {
 413                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 414                                                                 callback( producer, keyboard );
 415                                                         }
 416                                                 }
 417                                                 break;
 418                                 }
 419                         }
 420                 }
 421
 422                 if ( width != this->width || height != this->height )
 423                 {
 424                         if ( this->sdl_overlay != NULL )
 425                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 426                         this->sdl_overlay = NULL;
 427                 }
 428
 429                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 430                 {
 431                         // Force an overlay recreation
 432                         if ( this->sdl_overlay != NULL )
 433                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 434                         this->sdl_overlay = NULL;
 435
 436                         // open SDL window with video overlay, if possible
 437                         sdl_lock_display();
 438                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 439                         sdl_unlock_display();
 440                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 441                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 442                         //SDL_Flip( this->sdl_screen );
 443                         mlt_properties_set_int( properties, "changed", 0 );
 444                 }
 445                 else if ( mlt_properties_get_int( properties, "changed" ) )
 446                 {
 447                         sdl_lock_display();
 448                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 449                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 450                         sdl_unlock_display();
 451                         mlt_properties_set_int( properties, "changed", 0 );
 452                 }
 453
 454                 if ( this->running )
 455                 {
 456                         // Determine window's new display aspect ratio
 457                         double this_aspect = ( double )this->window_width / this->window_height;
 458
 459                         // Get the display aspect ratio
 460                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 461
 462                         // Determine frame's display aspect ratio
 463                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 464
 465                         // Store the width and height received
 466                         this->width = width;
 467                         this->height = height;
 468
 469                         // If using hardware scaler
 470                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 471                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 472                         {
 473                                 // Use hardware scaler to normalise display aspect ratio
 474                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 475                                 this->rect.h = this->window_height;
 476                                 if ( this->rect.w > this->window_width )
 477                                 {
 478                                         this->rect.w = this->window_width;
 479                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 480                                 }
 481                         }
 482                         // Special case optimisation to negate odd effect of sample aspect ratio
 483                         // not corresponding exactly with image resolution.
 484                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 485                         {
 486                                 this->rect.w = this->window_width;
 487                                 this->rect.h = this->window_height;
 488                         }
 489                         // Use hardware scaler to normalise sample aspect ratio
 490                         else if ( this->window_height * display_ratio > this->window_width )
 491                         {
 492                                 this->rect.w = this->window_width;
 493                                 this->rect.h = this->window_width / display_ratio;
 494                         }
 495                         else
 496                         {
 497                                 this->rect.w = this->window_height * display_ratio;
 498                                 this->rect.h = this->window_height;
 499                         }
 500
 501                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 502                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 503
 504                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 505                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 506                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 507                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 508
 509                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 510                 }
 511
 512                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 513                 {
 514                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 515                         SDL_Flip( this->sdl_screen );
 516                         sdl_lock_display();
 517                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 518                         sdl_unlock_display();
 519                 }
 520
 521                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 522                 {
 523                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 524                         sdl_lock_display();
 525                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 526                         {
 527                                 if ( image != NULL )
 528                                         memcpy( this->buffer, image, width * height * 2 );
 529                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 530                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 531                         }
 532                         sdl_unlock_display();
 533                 }
 534         }
 535
 536         return 0;
 537 }
 538
 539 static void *video_thread( void *arg )
 540 {
 541         // Identify the arg
 542         consumer_sdl this = arg;
 543
 544 #ifdef __DARWIN__
 545         NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
 546 #endif
 547
 548         // Obtain time of thread start
 549         struct timeval now;
 550         int64_t start = 0;
 551         int64_t elapsed = 0;
 552         struct timespec tm;
 553         mlt_frame next = NULL;
 554         mlt_properties properties = NULL;
 555         double speed = 0;
 556
 557         // Get real time flag
 558         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 559
 560         // Get the current time
 561         gettimeofday( &now, NULL );
 562
 563         // Determine start time
 564         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 565
 566         while ( this->running )
 567         {
 568                 // Pop the next frame
 569                 pthread_mutex_lock( &this->video_mutex );
 570                 next = mlt_deque_pop_front( this->queue );
 571                 while ( next == NULL && this->running )
 572                 {
 573                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 574                         next = mlt_deque_pop_front( this->queue );
 575                 }
 576                 pthread_mutex_unlock( &this->video_mutex );
 577
 578                 if ( !this->running || next == NULL ) break;
 579
 580                 // Get the properties
 581                 properties =  MLT_FRAME_PROPERTIES( next );
 582
 583                 // Get the speed of the frame
 584                 speed = mlt_properties_get_double( properties, "_speed" );
 585
 586                 // Get the current time
 587                 gettimeofday( &now, NULL );
 588
 589                 // Get the elapsed time
 590                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 591
 592                 // See if we have to delay the display of the current frame
 593                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 594                 {
 595                         // Obtain the scheduled playout time
 596                         mlt_position scheduled = mlt_properties_get_position( properties, "playtime" );
 597
 598                         // Determine the difference between the elapsed time and the scheduled playout time
 599                         mlt_position difference = scheduled - elapsed;
 600
 601                         // Smooth playback a bit
 602                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 603                         {
 604                                 tm.tv_sec = difference / 1000000;
 605                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 606                                 nanosleep( &tm, NULL );
 607                         }
 608
 609                         // Show current frame if not too old
 610                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 611                                 consumer_play_video( this, next );
 612
 613                         // If the queue is empty, recalculate start to allow build up again
 614                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 615                         {
 616                                 gettimeofday( &now, NULL );
 617                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 618                         }
 619                 }
 620
 621                 // This frame can now be closed
 622                 mlt_frame_close( next );
 623                 next = NULL;
 624         }
 625
 626         if ( next != NULL )
 627                 mlt_frame_close( next );
 628
 629         mlt_consumer_stopped( &this->parent );
 630
 631 #ifdef __DARWIN__
 632         [pool release];
 633 #endif
 634
 635         return NULL;
 636 }
 637
 638 /** Threaded wrapper for pipe.
 639 */
 640
 641 static void *consumer_thread( void *arg )
 642 {
 643         // Identify the arg
 644         consumer_sdl this = arg;
 645
 646 #ifdef __DARWIN__
 647         NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
 648 #endif
 649
 650         // Get the consumer
 651         mlt_consumer consumer = &this->parent;
 652
 653         // Video thread
 654         pthread_t thread;
 655
 656         // internal intialization
 657         int init_audio = 1;
 658         int init_video = 1;
 659         mlt_frame frame = NULL;
 660         mlt_properties properties = NULL;
 661         int duration = 0;
 662         int64_t playtime = 0;
 663         struct timespec tm = { 0, 100000 };
 664
 665         this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 666
 667         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "sdl_started" ) == 0 )
 668         {
 669                 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 670                 {
 671                         fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 672                         return NULL;
 673                 }
 674
 675                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 676                 SDL_EnableUNICODE( 1 );
 677         }
 678         else
 679         {
 680                 if ( SDL_GetVideoSurface( ) != NULL )
 681                 {
 682                         this->sdl_screen = SDL_GetVideoSurface( );
 683                         consumer_get_dimensions( &this->window_width, &this->window_height );
 684                         mlt_properties_set_int( this->properties, "changed", 0 );
 685                 }
 686         }
 687
 688         if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "audio_off" ) )
 689                 SDL_InitSubSystem( SDL_INIT_AUDIO );
 690
 691         // Loop until told not to
 692         while( this->running )
 693         {
 694                 // Get a frame from the attached producer
 695                 frame = mlt_consumer_rt_frame( consumer );
 696
 697                 // Ensure that we have a frame
 698                 if ( frame != NULL )
 699                 {
 700                         // Get the frame properties
 701                         properties =  MLT_FRAME_PROPERTIES( frame );
 702
 703                         // Play audio
 704                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 705
 706                         // Determine the start time now
 707                         if ( this->playing && init_video )
 708                         {
 709                                 // Create the video thread
 710                                 pthread_create( &thread, NULL, video_thread, this );
 711
 712                                 // Video doesn't need to be initialised any more
 713                                 init_video = 0;
 714                         }
 715
 716                         // Set playtime for this frame
 717                         mlt_properties_set_position( properties, "playtime", playtime );
 718
 719                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 720                                 nanosleep( &tm, NULL );
 721
 722                         // Push this frame to the back of the queue
 723                         pthread_mutex_lock( &this->video_mutex );
 724                         mlt_deque_push_back( this->queue, frame );
 725                         pthread_cond_broadcast( &this->video_cond );
 726                         pthread_mutex_unlock( &this->video_mutex );
 727
 728                         // Calculate the next playtime
 729                         playtime += ( duration * 1000 );
 730                 }
 731         }
 732
 733         // Kill the video thread
 734         if ( init_video == 0 )
 735         {
 736                 pthread_mutex_lock( &this->video_mutex );
 737                 pthread_cond_broadcast( &this->video_cond );
 738                 pthread_mutex_unlock( &this->video_mutex );
 739                 pthread_join( thread, NULL );
 740         }
 741
 742         // internal cleanup
 743         if ( this->sdl_overlay != NULL )
 744                 SDL_FreeYUVOverlay( this->sdl_overlay );
 745
 746         if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "audio_off" ) )
 747                 SDL_QuitSubSystem( SDL_INIT_AUDIO );
 748
 749         //if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "sdl_started" ) == 0 )
 750                 //SDL_Quit( );
 751
 752         while( mlt_deque_count( this->queue ) )
 753                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 754
 755         this->sdl_screen = NULL;
 756         this->sdl_overlay = NULL;
 757         this->audio_avail = 0;
 758
 759 #ifdef __DARWIN__
 760         [pool release];
 761 #endif
 762
 763         return NULL;
 764 }
 765
 766 static int consumer_get_dimensions( int *width, int *height )
 767 {
 768         int changed = 0;
 769
 770         // SDL windows manager structure
 771         SDL_SysWMinfo wm;
 772
 773         // Specify the SDL Version
 774         SDL_VERSION( &wm.version );
 775
 776         // Lock the display
 777         sdl_lock_display();
 778
 779 #ifndef __DARWIN__
 780         // Get the wm structure
 781         if ( SDL_GetWMInfo( &wm ) == 1 )
 782         {
 783                 // Check that we have the X11 wm
 784                 if ( wm.subsystem == SDL_SYSWM_X11 )
 785                 {
 786                         // Get the SDL window
 787                         Window window = wm.info.x11.window;
 788
 789                         // Get the display session
 790                         Display *display = wm.info.x11.display;
 791
 792                         // Get the window attributes
 793                         XWindowAttributes attr;
 794                         XGetWindowAttributes( display, window, &attr );
 795
 796                         // Determine whether window has changed
 797                         changed = *width != attr.width || *height != attr.height;
 798
 799                         // Return width and height
 800                         *width = attr.width;
 801                         *height = attr.height;
 802                 }
 803         }
 804 #endif
 805
 806         // Unlock the display
 807         sdl_lock_display();
 808
 809         return changed;
 810 }
 811
 812 /** Callback to allow override of the close method.
 813 */
 814
 815 static void consumer_close( mlt_consumer parent )
 816 {
 817         // Get the actual object
 818         consumer_sdl this = parent->child;
 819
 820         // Stop the consumer
 821         ///mlt_consumer_stop( parent );
 822
 823         // Now clean up the rest
 824         mlt_consumer_close( parent );
 825
 826         // Close the queue
 827         mlt_deque_close( this->queue );
 828
 829         // Destroy mutexes
 830         pthread_mutex_destroy( &this->audio_mutex );
 831         pthread_cond_destroy( &this->audio_cond );
 832
 833         // Finally clean up this
 834         free( this );
 835 }