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 /** This classes definition.
  33 */
  34
  35 typedef struct consumer_sdl_s *consumer_sdl;
  36
  37 struct consumer_sdl_s
  38 {
  39         struct mlt_consumer_s parent;
  40         mlt_properties properties;
  41         mlt_deque queue;
  42         pthread_t thread;
  43         int joined;
  44         int running;
  45         uint8_t audio_buffer[ 4096 * 10 ];
  46         int audio_avail;
  47         pthread_mutex_t audio_mutex;
  48         pthread_cond_t audio_cond;
  49         pthread_mutex_t video_mutex;
  50         pthread_cond_t video_cond;
  51         int window_width;
  52         int window_height;
  53         float aspect_ratio;
  54         float display_aspect;
  55         double last_frame_aspect;
  56         int width;
  57         int height;
  58         int playing;
  59         int sdl_flags;
  60         SDL_Surface *sdl_screen;
  61         SDL_Overlay *sdl_overlay;
  62         SDL_Rect rect;
  63         uint8_t *buffer;
  64         int bpp;
  65 };
  66
  67 /** Forward references to static functions.
  68 */
  69
  70 static int consumer_start( mlt_consumer parent );
  71 static int consumer_stop( mlt_consumer parent );
  72 static int consumer_is_stopped( mlt_consumer parent );
  73 static void consumer_close( mlt_consumer parent );
  74 static void *consumer_thread( void * );
  75 static int consumer_get_dimensions( int *width, int *height );
  76 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  77
  78 /** This is what will be called by the factory - anything can be passed in
  79         via the argument, but keep it simple.
  80 */
  81
  82 mlt_consumer consumer_sdl_init( char *arg )
  83 {
  84         // Create the consumer object
  85         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  86
  87         // If no malloc'd and consumer init ok
  88         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  89         {
  90                 // Create the queue
  91                 this->queue = mlt_deque_init( );
  92
  93                 // Get the parent consumer object
  94                 mlt_consumer parent = &this->parent;
  95
  96                 // We have stuff to clean up, so override the close method
  97                 parent->close = consumer_close;
  98
  99                 // get a handle on properties
 100                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 101                 this->properties = MLT_SERVICE_PROPERTIES( service );
 102
 103                 // Set the default volume
 104                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 105
 106                 // This is the initialisation of the consumer
 107                 pthread_mutex_init( &this->audio_mutex, NULL );
 108                 pthread_cond_init( &this->audio_cond, NULL);
 109                 pthread_mutex_init( &this->video_mutex, NULL );
 110                 pthread_cond_init( &this->video_cond, NULL);
 111
 112                 // Default scaler (for now we'll use nearest)
 113                 mlt_properties_set( this->properties, "rescale", "nearest" );
 114
 115                 // Default buffer for low latency
 116                 mlt_properties_set_int( this->properties, "buffer", 1 );
 117
 118                 // Default progressive true
 119                 mlt_properties_set_int( this->properties, "progressive", 0 );
 120
 121                 // Default audio buffer
 122                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 123
 124                 // Get sample aspect ratio
 125                 this->aspect_ratio = mlt_properties_get_double( this->properties, "aspect_ratio" );
 126
 127                 // Ensure we don't join on a non-running object
 128                 this->joined = 1;
 129
 130                 // Default display aspect ratio
 131                 this->display_aspect = 4.0 / 3.0;
 132
 133                 // process actual param
 134                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 135                 {
 136                         this->width = mlt_properties_get_int( this->properties, "width" );
 137                         this->height = mlt_properties_get_int( this->properties, "height" );
 138                 }
 139
 140                 // Default window size
 141                 this->window_width = ( float )this->height * this->display_aspect;
 142                 this->window_height = this->height;
 143
 144                 // Set the sdl flags
 145                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 146
 147                 // Allow thread to be started/stopped
 148                 parent->start = consumer_start;
 149                 parent->stop = consumer_stop;
 150                 parent->is_stopped = consumer_is_stopped;
 151
 152                 // Register specific events
 153                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 154
 155                 // Return the consumer produced
 156                 return parent;
 157         }
 158
 159         // malloc or consumer init failed
 160         free( this );
 161
 162         // Indicate failure
 163         return NULL;
 164 }
 165
 166 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 167 {
 168         if ( listener != NULL )
 169                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 170 }
 171
 172 int consumer_start( mlt_consumer parent )
 173 {
 174         consumer_sdl this = parent->child;
 175
 176         if ( !this->running )
 177         {
 178                 consumer_stop( parent );
 179
 180                 this->running = 1;
 181                 this->joined = 0;
 182
 183                 // Allow the user to force resizing to window size
 184                 if ( mlt_properties_get_int( this->properties, "resize" ) )
 185                 {
 186                         mlt_properties_set_int( this->properties, "width", this->width );
 187                         mlt_properties_set_int( this->properties, "height", this->height );
 188                 }
 189
 190                 pthread_create( &this->thread, NULL, consumer_thread, this );
 191         }
 192
 193         return 0;
 194 }
 195
 196 int consumer_stop( mlt_consumer parent )
 197 {
 198         // Get the actual object
 199         consumer_sdl this = parent->child;
 200
 201         if ( this->joined == 0 )
 202         {
 203                 // Kill the thread and clean up
 204                 this->joined = 1;
 205                 this->running = 0;
 206                 pthread_join( this->thread, NULL );
 207         }
 208
 209         return 0;
 210 }
 211
 212 int consumer_is_stopped( mlt_consumer parent )
 213 {
 214         consumer_sdl this = parent->child;
 215         return !this->running;
 216 }
 217
 218 static int sdl_lock_display( )
 219 {
 220         SDL_Surface *screen = SDL_GetVideoSurface( );
 221         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 222 }
 223
 224 static void sdl_unlock_display( )
 225 {
 226         SDL_Surface *screen = SDL_GetVideoSurface( );
 227         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 228                 SDL_UnlockSurface( screen );
 229 }
 230
 231 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 232 {
 233         consumer_sdl this = udata;
 234
 235         // Get the volume
 236         float volume = mlt_properties_get_double( this->properties, "volume" );
 237
 238         pthread_mutex_lock( &this->audio_mutex );
 239
 240         // Block until audio received
 241         while ( this->running && len > this->audio_avail )
 242                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 243
 244         if ( this->audio_avail >= len )
 245         {
 246                 // Place in the audio buffer
 247                 memcpy( stream, this->audio_buffer, len );
 248
 249                 // Remove len from the audio available
 250                 this->audio_avail -= len;
 251
 252                 // Remove the samples
 253                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 254         }
 255         else
 256         {
 257                 // Just to be safe, wipe the stream first
 258                 memset( stream, 0, len );
 259
 260                 // Copy what we have into the stream
 261                 memcpy( stream, this->audio_buffer, this->audio_avail );
 262
 263                 // Mix the audio
 264                 SDL_MixAudio( stream, stream, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 265
 266                 // No audio left
 267                 this->audio_avail = 0;
 268         }
 269
 270         // We're definitely playing now
 271         this->playing = 1;
 272
 273         pthread_cond_broadcast( &this->audio_cond );
 274         pthread_mutex_unlock( &this->audio_mutex );
 275 }
 276
 277 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 278 {
 279         // Get the properties of this consumer
 280         mlt_properties properties = this->properties;
 281         mlt_audio_format afmt = mlt_audio_pcm;
 282
 283         // Set the preferred params of the test card signal
 284         int channels = mlt_properties_get_int( properties, "channels" );
 285         int frequency = mlt_properties_get_int( properties, "frequency" );
 286         static int counter = 0;
 287
 288         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 289
 290         int16_t *pcm;
 291         int bytes;
 292
 293         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 294         *duration = ( ( samples * 1000 ) / frequency );
 295
 296         if ( mlt_properties_get_int( properties, "audio_off" ) )
 297         {
 298                 this->playing = 1;
 299                 init_audio = 1;
 300                 return init_audio;
 301         }
 302
 303         if ( init_audio == 1 )
 304         {
 305                 SDL_AudioSpec request;
 306                 SDL_AudioSpec got;
 307
 308                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 309
 310                 // specify audio format
 311                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 312                 this->playing = 0;
 313                 request.freq = frequency;
 314                 request.format = AUDIO_S16;
 315                 request.channels = channels;
 316                 request.samples = audio_buffer;
 317                 request.callback = sdl_fill_audio;
 318                 request.userdata = (void *)this;
 319                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 320                 {
 321                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 322                         init_audio = 2;
 323                 }
 324                 else if ( got.size != 0 )
 325                 {
 326                         SDL_PauseAudio( 0 );
 327                         init_audio = 0;
 328                 }
 329         }
 330
 331         if ( init_audio == 0 )
 332         {
 333                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 334                 bytes = ( samples * channels * 2 );
 335                 pthread_mutex_lock( &this->audio_mutex );
 336                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 337                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 338                 if ( this->running )
 339                 {
 340                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 341                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 342                         else
 343                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 344                         this->audio_avail += bytes;
 345                 }
 346                 pthread_cond_broadcast( &this->audio_cond );
 347                 pthread_mutex_unlock( &this->audio_mutex );
 348         }
 349         else
 350         {
 351                 this->playing = 1;
 352         }
 353
 354         return init_audio;
 355 }
 356
 357 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 358 {
 359         // Get the properties of this consumer
 360         mlt_properties properties = this->properties;
 361
 362         mlt_image_format vfmt = mlt_image_yuv422;
 363         int width = this->width, height = this->height;
 364         uint8_t *image;
 365         int changed = 0;
 366
 367         if ( this->running && mlt_properties_get_int( properties, "video_off" ) == 0 )
 368         {
 369                 // Get the image, width and height
 370                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 371                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 372
 373                 // Handle events
 374                 if ( this->sdl_screen != NULL )
 375                 {
 376                         SDL_Event event;
 377
 378                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 379
 380                         while ( SDL_PollEvent( &event ) )
 381                         {
 382                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 383
 384                                 switch( event.type )
 385                                 {
 386                                         case SDL_VIDEORESIZE:
 387                                                 this->window_width = event.resize.w;
 388                                                 this->window_height = event.resize.h;
 389                                                 changed = 1;
 390                                                 break;
 391                                         case SDL_QUIT:
 392                                                 this->running = 0;
 393                                                 break;
 394                                         case SDL_KEYDOWN:
 395                                                 {
 396                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 397                                                         char keyboard[ 2 ] = " ";
 398                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 399                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 400                                                         {
 401                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 402                                                                 callback( producer, keyboard );
 403                                                         }
 404                                                 }
 405                                                 break;
 406                                 }
 407                         }
 408                 }
 409
 410                 if ( width != this->width || height != this->height )
 411                 {
 412                         if ( this->sdl_overlay != NULL )
 413                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 414                         this->sdl_overlay = NULL;
 415                 }
 416
 417                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 418                 {
 419                         // Force an overlay recreation
 420                         if ( this->sdl_overlay != NULL )
 421                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 422                         this->sdl_overlay = NULL;
 423
 424                         // open SDL window with video overlay, if possible
 425                         sdl_lock_display();
 426                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 427                         sdl_unlock_display();
 428                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 429                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 430                         //SDL_Flip( this->sdl_screen );
 431                         mlt_properties_set_int( properties, "changed", 0 );
 432                 }
 433                 else if ( mlt_properties_get_int( properties, "changed" ) )
 434                 {
 435                         sdl_lock_display();
 436                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 437                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 438                         sdl_unlock_display();
 439                         mlt_properties_set_int( properties, "changed", 0 );
 440                 }
 441
 442                 if ( this->running )
 443                 {
 444                         // Determine window's new display aspect ratio
 445                         float this_aspect = ( float )this->window_width / this->window_height;
 446
 447                         // Determine frame's display aspect ratio
 448                         float frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 449                         this->width = width;
 450                         this->height = height;
 451
 452                         // If using hardware scaler
 453                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 454                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 455                         {
 456                                 // Special case optimisation to negate odd effect of sample aspect ratio
 457                                 // not corresponding exactly with image resolution.
 458                                 if ( ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) ) &&
 459                                          ( (int)( mlt_frame_get_aspect_ratio( frame ) * 1000 ) == (int)( this->aspect_ratio * 1000 ) ) )
 460                                 {
 461                                         this->rect.w = this->window_width;
 462                                         this->rect.h = this->window_height;
 463                                 }
 464                                 else
 465                                 {
 466                                         // Use hardware scaler to normalise display aspect ratio
 467                                         this->rect.w = frame_aspect / this_aspect * this->window_width;
 468                                         this->rect.h = this->window_height;
 469                                         if ( this->rect.w > this->window_width )
 470                                         {
 471                                                 this->rect.w = this->window_width;
 472                                                 this->rect.h = this_aspect / frame_aspect * this->window_height;
 473                                         }
 474                                 }
 475                         }
 476                         // Special case optimisation to negate odd effect of sample aspect ratio
 477                         // not corresponding exactly with image resolution.
 478                         else if ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) )
 479                         {
 480                                 this->rect.w = this->window_width;
 481                                 this->rect.h = this->window_height;
 482                         }
 483                         // Use hardware scaler to normalise sample aspect ratio
 484                         else if ( this->window_height * this->display_aspect > this->window_width )
 485                         {
 486                                 this->rect.w = this->window_width;
 487                                 this->rect.h = this->window_width / this->display_aspect;
 488                         }
 489                         else
 490                         {
 491                                 this->rect.w = this->window_height * this->display_aspect;
 492                                 this->rect.h = this->window_height;
 493                         }
 494
 495                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 496                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 497
 498                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 499                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 500                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 501                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 502
 503                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 504                 }
 505
 506                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 507                 {
 508                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 509                         SDL_Flip( this->sdl_screen );
 510                         sdl_lock_display();
 511                         this->sdl_overlay = SDL_CreateYUVOverlay( this->width, this->height, SDL_YUY2_OVERLAY, this->sdl_screen );
 512                         sdl_unlock_display();
 513                 }
 514
 515                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 516                 {
 517                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 518                         sdl_lock_display();
 519                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 520                         {
 521                                 if ( image != NULL )
 522                                         memcpy( this->buffer, image, width * height * 2 );
 523                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 524                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 525                         }
 526                         sdl_unlock_display();
 527                 }
 528         }
 529
 530         return 0;
 531 }
 532
 533 static void *video_thread( void *arg )
 534 {
 535         // Identify the arg
 536         consumer_sdl this = arg;
 537
 538         // Obtain time of thread start
 539         struct timeval now;
 540         int64_t start = 0;
 541         int64_t elapsed = 0;
 542         struct timespec tm;
 543         mlt_frame next = NULL;
 544         mlt_properties properties = NULL;
 545         double speed = 0;
 546
 547         // Get real time flag
 548         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 549
 550         // Get the current time
 551         gettimeofday( &now, NULL );
 552
 553         // Determine start time
 554         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 555
 556         while ( this->running )
 557         {
 558                 // Pop the next frame
 559                 pthread_mutex_lock( &this->video_mutex );
 560                 next = mlt_deque_pop_front( this->queue );
 561                 while ( next == NULL && this->running )
 562                 {
 563                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 564                         next = mlt_deque_pop_front( this->queue );
 565                 }
 566                 pthread_mutex_unlock( &this->video_mutex );
 567
 568                 if ( !this->running || next == NULL ) break;
 569
 570                 // Get the properties
 571                 properties =  MLT_FRAME_PROPERTIES( next );
 572
 573                 // Get the speed of the frame
 574                 speed = mlt_properties_get_double( properties, "_speed" );
 575
 576                 // Get the current time
 577                 gettimeofday( &now, NULL );
 578
 579                 // Get the elapsed time
 580                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 581
 582                 // See if we have to delay the display of the current frame
 583                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 584                 {
 585                         // Obtain the scheduled playout time
 586                         mlt_position scheduled = mlt_properties_get_position( properties, "playtime" );
 587
 588                         // Determine the difference between the elapsed time and the scheduled playout time
 589                         mlt_position difference = scheduled - elapsed;
 590
 591                         // Smooth playback a bit
 592                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 593                         {
 594                                 tm.tv_sec = difference / 1000000;
 595                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 596                                 nanosleep( &tm, NULL );
 597                         }
 598
 599                         // Show current frame if not too old
 600                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 601                                 consumer_play_video( this, next );
 602
 603                         // If the queue is empty, recalculate start to allow build up again
 604                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 605                         {
 606                                 gettimeofday( &now, NULL );
 607                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 608                         }
 609                 }
 610
 611                 // This frame can now be closed
 612                 mlt_frame_close( next );
 613                 next = NULL;
 614         }
 615
 616         if ( next != NULL )
 617                 mlt_frame_close( next );
 618
 619         mlt_consumer_stopped( &this->parent );
 620
 621         return NULL;
 622 }
 623
 624 /** Threaded wrapper for pipe.
 625 */
 626
 627 static void *consumer_thread( void *arg )
 628 {
 629         // Identify the arg
 630         consumer_sdl this = arg;
 631
 632         // Get the consumer
 633         mlt_consumer consumer = &this->parent;
 634
 635         // Video thread
 636         pthread_t thread;
 637
 638         // internal intialization
 639         int init_audio = 1;
 640         int init_video = 1;
 641         mlt_frame frame = NULL;
 642         mlt_properties properties = NULL;
 643         int duration = 0;
 644         int64_t playtime = 0;
 645         struct timespec tm = { 0, 100000 };
 646
 647         this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 648
 649         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "sdl_started" ) == 0 )
 650         {
 651                 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 652                 {
 653                         fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 654                         return NULL;
 655                 }
 656
 657                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 658                 SDL_EnableUNICODE( 1 );
 659         }
 660         else
 661         {
 662                 if ( SDL_GetVideoSurface( ) != NULL )
 663                 {
 664                         this->sdl_screen = SDL_GetVideoSurface( );
 665                         consumer_get_dimensions( &this->window_width, &this->window_height );
 666                         mlt_properties_set_int( this->properties, "changed", 0 );
 667                 }
 668         }
 669
 670         if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "audio_off" ) )
 671                 SDL_InitSubSystem( SDL_INIT_AUDIO );
 672
 673         // Loop until told not to
 674         while( this->running )
 675         {
 676                 // Get a frame from the attached producer
 677                 frame = mlt_consumer_rt_frame( consumer );
 678
 679                 // Ensure that we have a frame
 680                 if ( frame != NULL )
 681                 {
 682                         // Get the frame properties
 683                         properties =  MLT_FRAME_PROPERTIES( frame );
 684
 685                         // Play audio
 686                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 687
 688                         // Determine the start time now
 689                         if ( this->playing && init_video )
 690                         {
 691                                 // Create the video thread
 692                                 pthread_create( &thread, NULL, video_thread, this );
 693
 694                                 // Video doesn't need to be initialised any more
 695                                 init_video = 0;
 696                         }
 697
 698                         // Set playtime for this frame
 699                         mlt_properties_set_position( properties, "playtime", playtime );
 700
 701                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 702                                 nanosleep( &tm, NULL );
 703
 704                         // Push this frame to the back of the queue
 705                         pthread_mutex_lock( &this->video_mutex );
 706                         mlt_deque_push_back( this->queue, frame );
 707                         pthread_cond_broadcast( &this->video_cond );
 708                         pthread_mutex_unlock( &this->video_mutex );
 709
 710                         // Calculate the next playtime
 711                         playtime += ( duration * 1000 );
 712                 }
 713         }
 714
 715         // Kill the video thread
 716         if ( init_video == 0 )
 717         {
 718                 pthread_mutex_lock( &this->video_mutex );
 719                 pthread_cond_broadcast( &this->video_cond );
 720                 pthread_mutex_unlock( &this->video_mutex );
 721                 pthread_join( thread, NULL );
 722         }
 723
 724         // internal cleanup
 725         if ( this->sdl_overlay != NULL )
 726                 SDL_FreeYUVOverlay( this->sdl_overlay );
 727
 728         if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "audio_off" ) )
 729                 SDL_QuitSubSystem( SDL_INIT_AUDIO );
 730
 731         //if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "sdl_started" ) == 0 )
 732                 //SDL_Quit( );
 733
 734         while( mlt_deque_count( this->queue ) )
 735                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 736
 737         this->sdl_screen = NULL;
 738         this->sdl_overlay = NULL;
 739         this->audio_avail = 0;
 740
 741         return NULL;
 742 }
 743
 744 static int consumer_get_dimensions( int *width, int *height )
 745 {
 746         int changed = 0;
 747
 748         // SDL windows manager structure
 749         SDL_SysWMinfo wm;
 750
 751         // Specify the SDL Version
 752         SDL_VERSION( &wm.version );
 753
 754         // Lock the display
 755         sdl_lock_display();
 756
 757         // Get the wm structure
 758         if ( SDL_GetWMInfo( &wm ) == 1 )
 759         {
 760                 // Check that we have the X11 wm
 761                 if ( wm.subsystem == SDL_SYSWM_X11 )
 762                 {
 763                         // Get the SDL window
 764                         Window window = wm.info.x11.window;
 765
 766                         // Get the display session
 767                         Display *display = wm.info.x11.display;
 768
 769                         // Get the window attributes
 770                         XWindowAttributes attr;
 771                         XGetWindowAttributes( display, window, &attr );
 772
 773                         // Determine whether window has changed
 774                         changed = *width != attr.width || *height != attr.height;
 775
 776                         // Return width and height
 777                         *width = attr.width;
 778                         *height = attr.height;
 779                 }
 780         }
 781
 782         // Unlock the display
 783         sdl_lock_display();
 784
 785         return changed;
 786 }
 787
 788 /** Callback to allow override of the close method.
 789 */
 790
 791 static void consumer_close( mlt_consumer parent )
 792 {
 793         // Get the actual object
 794         consumer_sdl this = parent->child;
 795
 796         // Stop the consumer
 797         ///mlt_consumer_stop( parent );
 798
 799         // Now clean up the rest
 800         mlt_consumer_close( parent );
 801
 802         // Close the queue
 803         mlt_deque_close( this->queue );
 804
 805         // Destroy mutexes
 806         pthread_mutex_destroy( &this->audio_mutex );
 807         pthread_cond_destroy( &this->audio_cond );
 808
 809         // Finally clean up this
 810         free( this );
 811 }