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 };
  65
  66 /** Forward references to static functions.
  67 */
  68
  69 static int consumer_start( mlt_consumer parent );
  70 static int consumer_stop( mlt_consumer parent );
  71 static int consumer_is_stopped( mlt_consumer parent );
  72 static void consumer_close( mlt_consumer parent );
  73 static void *consumer_thread( void * );
  74 static int consumer_get_dimensions( int *width, int *height );
  75 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  76
  77 /** This is what will be called by the factory - anything can be passed in
  78         via the argument, but keep it simple.
  79 */
  80
  81 mlt_consumer consumer_sdl_init( char *arg )
  82 {
  83         // Create the consumer object
  84         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  85
  86         // If no malloc'd and consumer init ok
  87         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  88         {
  89                 // Create the queue
  90                 this->queue = mlt_deque_init( );
  91
  92                 // Get the parent consumer object
  93                 mlt_consumer parent = &this->parent;
  94
  95                 // We have stuff to clean up, so override the close method
  96                 parent->close = consumer_close;
  97
  98                 // get a handle on properties
  99                 mlt_service service = mlt_consumer_service( parent );
 100                 this->properties = mlt_service_properties( service );
 101
 102                 // Set the default volume
 103                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 104
 105                 // This is the initialisation of the consumer
 106                 pthread_mutex_init( &this->audio_mutex, NULL );
 107                 pthread_cond_init( &this->audio_cond, NULL);
 108                 pthread_mutex_init( &this->video_mutex, NULL );
 109                 pthread_cond_init( &this->video_cond, NULL);
 110
 111                 // Default scaler (for now we'll use nearest)
 112                 mlt_properties_set( this->properties, "rescale", "nearest" );
 113
 114                 // Default buffer for low latency
 115                 mlt_properties_set_int( this->properties, "buffer", 1 );
 116
 117                 // Default progressive true
 118                 mlt_properties_set_int( this->properties, "progressive", 0 );
 119
 120                 // Default audio buffer
 121                 mlt_properties_set_int( this->properties, "audio_buffer", 1024 );
 122
 123                 // Get sample aspect ratio
 124                 this->aspect_ratio = mlt_properties_get_double( this->properties, "aspect_ratio" );
 125
 126                 // Ensure we don't join on a non-running object
 127                 this->joined = 1;
 128
 129                 // Default display aspect ratio
 130                 this->display_aspect = 4.0 / 3.0;
 131
 132                 // process actual param
 133                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 134                 {
 135                         this->width = mlt_properties_get_int( this->properties, "width" );
 136                         this->height = mlt_properties_get_int( this->properties, "height" );
 137                 }
 138
 139                 // Default window size
 140                 this->window_width = ( float )this->height * this->display_aspect;
 141                 this->window_height = this->height;
 142
 143                 // Set the sdl flags
 144                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 145
 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                 pthread_attr_t thread_attributes;
 178
 179                 consumer_stop( parent );
 180
 181                 this->running = 1;
 182                 this->joined = 0;
 183
 184                 // Allow the user to force resizing to window size
 185                 if ( mlt_properties_get_int( this->properties, "resize" ) )
 186                 {
 187                         mlt_properties_set_int( this->properties, "width", this->width );
 188                         mlt_properties_set_int( this->properties, "height", this->height );
 189                 }
 190
 191                 // Inherit the scheduling priority
 192                 pthread_attr_init( &thread_attributes );
 193                 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
 194
 195                 pthread_create( &this->thread, &thread_attributes, consumer_thread, this );
 196         }
 197
 198         return 0;
 199 }
 200
 201 int consumer_stop( mlt_consumer parent )
 202 {
 203         // Get the actual object
 204         consumer_sdl this = parent->child;
 205
 206         if ( this->joined == 0 )
 207         {
 208                 // Kill the thread and clean up
 209                 this->running = 0;
 210
 211                 pthread_mutex_lock( &this->audio_mutex );
 212                 pthread_cond_broadcast( &this->audio_cond );
 213                 pthread_mutex_unlock( &this->audio_mutex );
 214
 215                 pthread_join( this->thread, NULL );
 216                 this->joined = 1;
 217         }
 218
 219         return 0;
 220 }
 221
 222 int consumer_is_stopped( mlt_consumer parent )
 223 {
 224         consumer_sdl this = parent->child;
 225         return !this->running;
 226 }
 227
 228 static int sdl_lock_display( )
 229 {
 230         SDL_Surface *screen = SDL_GetVideoSurface( );
 231         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 232 }
 233
 234 static void sdl_unlock_display( )
 235 {
 236         SDL_Surface *screen = SDL_GetVideoSurface( );
 237         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 238                 SDL_UnlockSurface( screen );
 239 }
 240
 241 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 242 {
 243         consumer_sdl this = udata;
 244
 245         // Get the volume
 246         float volume = mlt_properties_get_double( this->properties, "volume" );
 247
 248         pthread_mutex_lock( &this->audio_mutex );
 249
 250         // Block until audio received
 251         while ( this->running && len > this->audio_avail )
 252                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 253
 254         if ( this->audio_avail >= len )
 255         {
 256                 // Place in the audio buffer
 257                 memcpy( stream, this->audio_buffer, len );
 258
 259                 // Remove len from the audio available
 260                 this->audio_avail -= len;
 261
 262                 // Remove the samples
 263                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 264         }
 265         else
 266         {
 267                 // Just to be safe, wipe the stream first
 268                 memset( stream, 0, len );
 269
 270                 // Copy what we have into the stream
 271                 memcpy( stream, this->audio_buffer, this->audio_avail );
 272
 273                 // Mix the audio
 274                 SDL_MixAudio( stream, stream, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 275
 276                 // No audio left
 277                 this->audio_avail = 0;
 278         }
 279
 280         // We're definitely playing now
 281         this->playing = 1;
 282
 283         pthread_cond_broadcast( &this->audio_cond );
 284         pthread_mutex_unlock( &this->audio_mutex );
 285 }
 286
 287 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 288 {
 289         // Get the properties of this consumer
 290         mlt_properties properties = this->properties;
 291         mlt_audio_format afmt = mlt_audio_pcm;
 292
 293         // Set the preferred params of the test card signal
 294         int channels = mlt_properties_get_int( properties, "channels" );
 295         int frequency = mlt_properties_get_int( properties, "frequency" );
 296         static int counter = 0;
 297
 298         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 299
 300         int16_t *pcm;
 301         int bytes;
 302
 303         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 304         *duration = ( ( samples * 1000 ) / frequency );
 305
 306         if ( mlt_properties_get_int( properties, "audio_off" ) )
 307         {
 308                 this->playing = 1;
 309                 init_audio = 1;
 310                 return init_audio;
 311         }
 312
 313         if ( init_audio == 1 )
 314         {
 315                 SDL_AudioSpec request;
 316                 SDL_AudioSpec got;
 317
 318                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 319
 320                 // specify audio format
 321                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 322                 this->playing = 0;
 323                 request.freq = frequency;
 324                 request.format = AUDIO_S16;
 325                 request.channels = channels;
 326                 request.samples = audio_buffer;
 327                 request.callback = sdl_fill_audio;
 328                 request.userdata = (void *)this;
 329                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 330                 {
 331                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 332                         init_audio = 2;
 333                 }
 334                 else if ( got.size != 0 )
 335                 {
 336                         SDL_PauseAudio( 0 );
 337                         init_audio = 0;
 338                 }
 339         }
 340
 341         if ( init_audio == 0 )
 342         {
 343                 mlt_properties properties = mlt_frame_properties( frame );
 344                 bytes = ( samples * channels * 2 );
 345                 pthread_mutex_lock( &this->audio_mutex );
 346                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 347                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 348                 if ( this->running )
 349                 {
 350                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 351                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 352                         else
 353                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 354                         this->audio_avail += bytes;
 355                 }
 356                 pthread_cond_broadcast( &this->audio_cond );
 357                 pthread_mutex_unlock( &this->audio_mutex );
 358         }
 359         else
 360         {
 361                 this->playing = 1;
 362         }
 363
 364         return init_audio;
 365 }
 366
 367 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 368 {
 369         // Get the properties of this consumer
 370         mlt_properties properties = this->properties;
 371
 372         mlt_image_format vfmt = mlt_image_yuv422;
 373         int width = this->width, height = this->height;
 374         uint8_t *image;
 375         int changed = 0;
 376
 377         if ( mlt_properties_get_int( properties, "video_off" ) == 0 )
 378         {
 379                 // Get the image, width and height
 380                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 381                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 382
 383                 // Handle events
 384                 if ( this->sdl_screen != NULL )
 385                 {
 386                         SDL_Event event;
 387
 388                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 389
 390                         while ( SDL_PollEvent( &event ) )
 391                         {
 392                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 393
 394                                 switch( event.type )
 395                                 {
 396                                         case SDL_VIDEORESIZE:
 397                                                 this->window_width = event.resize.w;
 398                                                 this->window_height = event.resize.h;
 399                                                 changed = 1;
 400                                                 break;
 401                                         case SDL_QUIT:
 402                                                 this->running = 0;
 403                                                 break;
 404                                         case SDL_KEYDOWN:
 405                                                 {
 406                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 407                                                         char keyboard[ 2 ] = " ";
 408                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 409                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 410                                                         {
 411                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 412                                                                 callback( producer, keyboard );
 413                                                         }
 414                                                 }
 415                                                 break;
 416                                 }
 417                         }
 418                 }
 419
 420                 if ( width != this->width || height != this->height ||
 421                          ( ( int )( this->last_frame_aspect * 1000 ) != ( int )( mlt_frame_get_aspect_ratio( frame ) * 1000 ) &&
 422                          ( mlt_frame_get_aspect_ratio( frame ) != 1.0 || this->last_frame_aspect == 0.0 ) ) )
 423
 424                 {
 425                         this->width = width;
 426                         this->height = height;
 427                         this->last_frame_aspect = mlt_frame_get_aspect_ratio( frame );
 428                         changed = 1;
 429                 }
 430
 431                 if ( this->sdl_screen == NULL || changed )
 432                 {
 433                         // Determine frame's display aspect ratio
 434                         float frame_aspect = mlt_frame_get_aspect_ratio( frame ) * this->width / this->height;
 435
 436                         // Determine window's new display aspect ratio
 437                         float this_aspect = ( float )this->window_width / this->window_height;
 438
 439                         // If using hardware scaler
 440                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 441                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 442                         {
 443                                 // Special case optimisation to negate odd effect of sample aspect ratio
 444                                 // not corresponding exactly with image resolution.
 445                                 if ( ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) ) &&
 446                                          ( (int)( mlt_frame_get_aspect_ratio( frame ) * 1000 ) == (int)( this->aspect_ratio * 1000 ) ) )
 447                                 {
 448                                         this->rect.w = this->window_width;
 449                                         this->rect.h = this->window_height;
 450                                 }
 451                                 else
 452                                 {
 453                                         // Use hardware scaler to normalise display aspect ratio
 454                                         this->rect.w = frame_aspect / this_aspect * this->window_width;
 455                                         this->rect.h = this->window_height;
 456                                         if ( this->rect.w > this->window_width )
 457                                         {
 458                                                 this->rect.w = this->window_width;
 459                                                 this->rect.h = this_aspect / frame_aspect * this->window_height;
 460                                         }
 461                                 }
 462                         }
 463                         // Special case optimisation to negate odd effect of sample aspect ratio
 464                         // not corresponding exactly with image resolution.
 465                         else if ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) )
 466                         {
 467                                 this->rect.w = this->window_width;
 468                                 this->rect.h = this->window_height;
 469                         }
 470                         // Use hardware scaler to normalise sample aspect ratio
 471                         else if ( this->window_height * this->display_aspect > this->window_width )
 472                         {
 473                                 this->rect.w = this->window_width;
 474                                 this->rect.h = this->window_width / this->display_aspect;
 475                         }
 476                         else
 477                         {
 478                                 this->rect.w = this->window_height * this->display_aspect;
 479                                 this->rect.h = this->window_height;
 480                         }
 481
 482                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 483                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 484
 485                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 486                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 487                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 488                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 489
 490                         // Force an overlay recreation
 491                         if ( this->sdl_overlay != NULL )
 492                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 493
 494                         // open SDL window with video overlay, if possible
 495                         sdl_lock_display();
 496                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 497                         sdl_unlock_display();
 498                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 499                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 500                         SDL_Flip( this->sdl_screen );
 501                         mlt_properties_set_int( properties, "changed", 0 );
 502
 503                         if ( this->sdl_screen != NULL )
 504                         {
 505                                 SDL_SetClipRect( this->sdl_screen, &this->rect );
 506                                 sdl_lock_display();
 507                                 this->sdl_overlay = SDL_CreateYUVOverlay( this->width, this->height, SDL_YUY2_OVERLAY, this->sdl_screen );
 508                                 sdl_unlock_display();
 509                         }
 510                 }
 511
 512                 if ( mlt_properties_get_int( properties, "changed" ) )
 513                 {
 514                         sdl_lock_display();
 515                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 516                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 517                         sdl_unlock_display();
 518                         mlt_properties_set_int( properties, "changed", 0 );
 519                 }
 520
 521                 if ( 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         // Obtain time of thread start
 545         struct timeval now;
 546         int64_t start = 0;
 547         int64_t elapsed = 0;
 548         struct timespec tm;
 549         mlt_frame next = NULL;
 550         mlt_properties properties = NULL;
 551         double speed = 0;
 552
 553         // Get real time flag
 554         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 555
 556         // Get the current time
 557         gettimeofday( &now, NULL );
 558
 559         // Determine start time
 560         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 561
 562         while ( this->running )
 563         {
 564                 // Pop the next frame
 565                 pthread_mutex_lock( &this->video_mutex );
 566                 while ( ( next = mlt_deque_pop_front( this->queue ) ) == NULL && this->running )
 567                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 568                 pthread_mutex_unlock( &this->video_mutex );
 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         }
 614
 615         mlt_consumer_stopped( &this->parent );
 616
 617         return NULL;
 618 }
 619
 620 /** Threaded wrapper for pipe.
 621 */
 622
 623 static void *consumer_thread( void *arg )
 624 {
 625         // Identify the arg
 626         consumer_sdl this = arg;
 627
 628         // Get the consumer
 629         mlt_consumer consumer = &this->parent;
 630
 631         // Video thread
 632         pthread_t thread;
 633
 634         // internal intialization
 635         int init_audio = 1;
 636         int init_video = 1;
 637         mlt_frame frame = NULL;
 638         mlt_properties properties = NULL;
 639         int duration = 0;
 640         int64_t playtime = 0;
 641         struct timespec tm = { 0, 100000 };
 642
 643         if ( mlt_properties_get_int( mlt_consumer_properties( consumer ), "sdl_started" ) == 0 )
 644         {
 645                 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 646                 {
 647                         fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 648                         return NULL;
 649                 }
 650
 651                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 652                 SDL_EnableUNICODE( 1 );
 653         }
 654         else
 655         {
 656                 if ( SDL_GetVideoSurface( ) != NULL )
 657                         consumer_get_dimensions( &this->window_width, &this->window_height );
 658                 mlt_properties_set_int( mlt_consumer_properties( consumer ), "changed", 1 );
 659         }
 660
 661         SDL_InitSubSystem( SDL_INIT_AUDIO );
 662
 663         // Loop until told not to
 664         while( this->running )
 665         {
 666                 // Get a frame from the attached producer
 667                 frame = mlt_consumer_rt_frame( consumer );
 668
 669                 // Ensure that we have a frame
 670                 if ( frame != NULL )
 671                 {
 672                         // Get the frame properties
 673                         properties =  mlt_frame_properties( frame );
 674
 675                         // Play audio
 676                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 677
 678                         // Determine the start time now
 679                         if ( this->playing && init_video )
 680                         {
 681                                 // Create the video thread
 682                                 pthread_create( &thread, NULL, video_thread, this );
 683
 684                                 // Video doesn't need to be initialised any more
 685                                 init_video = 0;
 686                         }
 687
 688                         // Set playtime for this frame
 689                         mlt_properties_set_position( properties, "playtime", playtime );
 690
 691                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 692                                 nanosleep( &tm, NULL );
 693
 694                         // Push this frame to the back of the queue
 695                         pthread_mutex_lock( &this->video_mutex );
 696                         mlt_deque_push_back( this->queue, frame );
 697                         pthread_cond_broadcast( &this->video_cond );
 698                         pthread_mutex_unlock( &this->video_mutex );
 699
 700                         // Calculate the next playtime
 701                         playtime += ( duration * 1000 );
 702                 }
 703         }
 704
 705         // Kill the video thread
 706         if ( init_video == 0 )
 707         {
 708                 pthread_mutex_lock( &this->video_mutex );
 709                 pthread_cond_broadcast( &this->video_cond );
 710                 pthread_mutex_unlock( &this->video_mutex );
 711                 pthread_join( thread, NULL );
 712         }
 713
 714         // internal cleanup
 715         if ( this->sdl_overlay != NULL )
 716                 SDL_FreeYUVOverlay( this->sdl_overlay );
 717
 718         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 719
 720         if ( mlt_properties_get_int( mlt_consumer_properties( consumer ), "sdl_started" ) == 0 )
 721                 SDL_Quit( );
 722
 723         while( mlt_deque_count( this->queue ) )
 724                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 725
 726         this->sdl_screen = NULL;
 727         this->sdl_overlay = NULL;
 728         this->audio_avail = 0;
 729
 730         return NULL;
 731 }
 732
 733 static int consumer_get_dimensions( int *width, int *height )
 734 {
 735         int changed = 0;
 736
 737         // SDL windows manager structure
 738         SDL_SysWMinfo wm;
 739
 740         // Specify the SDL Version
 741         SDL_VERSION( &wm.version );
 742
 743         // Lock the display
 744         sdl_lock_display();
 745
 746         // Get the wm structure
 747         if ( SDL_GetWMInfo( &wm ) == 1 )
 748         {
 749                 // Check that we have the X11 wm
 750                 if ( wm.subsystem == SDL_SYSWM_X11 )
 751                 {
 752                         // Get the SDL window
 753                         Window window = wm.info.x11.window;
 754
 755                         // Get the display session
 756                         Display *display = wm.info.x11.display;
 757
 758                         // Get the window attributes
 759                         XWindowAttributes attr;
 760                         XGetWindowAttributes( display, window, &attr );
 761
 762                         // Determine whether window has changed
 763                         changed = *width != attr.width || *height != attr.height;
 764
 765                         // Return width and height
 766                         *width = attr.width;
 767                         *height = attr.height;
 768                 }
 769         }
 770
 771         // Unlock the display
 772         sdl_lock_display();
 773
 774         return changed;
 775 }
 776
 777 /** Callback to allow override of the close method.
 778 */
 779
 780 static void consumer_close( mlt_consumer parent )
 781 {
 782         // Get the actual object
 783         consumer_sdl this = parent->child;
 784
 785         // Stop the consumer
 786         mlt_consumer_stop( parent );
 787
 788         // Close the queue
 789         mlt_deque_close( this->queue );
 790
 791         // Destroy mutexes
 792         pthread_mutex_destroy( &this->audio_mutex );
 793         pthread_cond_destroy( &this->audio_cond );
 794
 795         // Now clean up the rest
 796         mlt_consumer_close( parent );
 797
 798         // Finally clean up this
 799         free( this );
 800 }