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