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 library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "consumer_sdl.h"
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <framework/mlt_factory.h>
  25 #include <framework/mlt_filter.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <pthread.h>
  30 #include <SDL/SDL.h>
  31 #include <SDL/SDL_syswm.h>
  32 #include <sys/time.h>
  33
  34 /** This classes definition.
  35 */
  36
  37 typedef struct consumer_sdl_s *consumer_sdl;
  38
  39 struct consumer_sdl_s
  40 {
  41         struct mlt_consumer_s parent;
  42         mlt_properties properties;
  43         mlt_deque queue;
  44         pthread_t thread;
  45         int joined;
  46         int running;
  47         uint8_t audio_buffer[ 4096 * 10 ];
  48         int audio_avail;
  49         pthread_mutex_t audio_mutex;
  50         pthread_cond_t audio_cond;
  51         pthread_mutex_t video_mutex;
  52         pthread_cond_t video_cond;
  53         int window_width;
  54         int window_height;
  55         int previous_width;
  56         int previous_height;
  57         int width;
  58         int height;
  59         int playing;
  60         int sdl_flags;
  61         SDL_Surface *sdl_screen;
  62         SDL_Overlay *sdl_overlay;
  63         SDL_Rect rect;
  64         uint8_t *buffer;
  65         int bpp;
  66         int filtered;
  67 };
  68
  69 /** Forward references to static functions.
  70 */
  71
  72 static int consumer_start( mlt_consumer parent );
  73 static int consumer_stop( mlt_consumer parent );
  74 static int consumer_is_stopped( mlt_consumer parent );
  75 static void consumer_close( mlt_consumer parent );
  76 static void *consumer_thread( void * );
  77 static int consumer_get_dimensions( int *width, int *height );
  78 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  79
  80 /** This is what will be called by the factory - anything can be passed in
  81         via the argument, but keep it simple.
  82 */
  83
  84 mlt_consumer consumer_sdl_init( char *arg )
  85 {
  86         // Create the consumer object
  87         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  88
  89         // If no malloc'd and consumer init ok
  90         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  91         {
  92                 // Create the queue
  93                 this->queue = mlt_deque_init( );
  94
  95                 // Get the parent consumer object
  96                 mlt_consumer parent = &this->parent;
  97
  98                 // We have stuff to clean up, so override the close method
  99                 parent->close = consumer_close;
 100
 101                 // get a handle on properties
 102                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 103                 this->properties = MLT_SERVICE_PROPERTIES( service );
 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                 // Set the sdl flags
 137                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 138
 139                 // Allow thread to be started/stopped
 140                 parent->start = consumer_start;
 141                 parent->stop = consumer_stop;
 142                 parent->is_stopped = consumer_is_stopped;
 143
 144                 // Register specific events
 145                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 146
 147                 // Return the consumer produced
 148                 return parent;
 149         }
 150
 151         // malloc or consumer init failed
 152         free( this );
 153
 154         // Indicate failure
 155         return NULL;
 156 }
 157
 158 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 159 {
 160         if ( listener != NULL )
 161                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 162 }
 163
 164 int consumer_start( mlt_consumer parent )
 165 {
 166         consumer_sdl this = parent->child;
 167
 168         if ( !this->running )
 169         {
 170                 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
 171                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 172                 int display_off = video_off | preview_off;
 173                 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
 174                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 175
 176                 consumer_stop( parent );
 177
 178                 this->running = 1;
 179                 this->joined = 0;
 180
 181                 this->width = mlt_properties_get_int( this->properties, "width" );
 182                 this->height = mlt_properties_get_int( this->properties, "height" );
 183
 184                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 185
 186                 // Attach a colour space converter
 187                 if ( preview_off && !this->filtered )
 188                 {
 189                         mlt_filter filter = mlt_factory_filter( "avcolour_space", NULL );
 190                         mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "forced", mlt_image_yuv422 );
 191                         mlt_service_attach( MLT_CONSUMER_SERVICE( parent ), filter );
 192                         mlt_filter_close( filter );
 193                         this->filtered = 1;
 194                 }
 195
 196                 if ( sdl_started == 0 && display_off == 0 )
 197                 {
 198                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 199                         {
 200                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 201                                 return -1;
 202                         }
 203
 204                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 205                         SDL_EnableUNICODE( 1 );
 206                 }
 207                 else if ( display_off == 0 )
 208                 {
 209                         this->sdl_screen = SDL_GetVideoSurface( );
 210                 }
 211
 212                 if ( audio_off == 0 )
 213                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 214
 215                 // Default window size
 216                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 217                 this->window_width = ( double )this->height * display_ratio;
 218                 this->window_height = this->height;
 219
 220                 if ( this->sdl_screen == NULL && display_off == 0 )
 221                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 222
 223                 pthread_create( &this->thread, NULL, consumer_thread, this );
 224         }
 225
 226         return 0;
 227 }
 228
 229 int consumer_stop( mlt_consumer parent )
 230 {
 231         // Get the actual object
 232         consumer_sdl this = parent->child;
 233
 234         if ( this->joined == 0 )
 235         {
 236                 // Kill the thread and clean up
 237                 this->joined = 1;
 238                 this->running = 0;
 239                 pthread_join( this->thread, NULL );
 240
 241                 // internal cleanup
 242                 if ( this->sdl_overlay != NULL )
 243                         SDL_FreeYUVOverlay( this->sdl_overlay );
 244                 this->sdl_overlay = NULL;
 245
 246                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 247                 {
 248                         pthread_mutex_lock( &this->audio_mutex );
 249                         pthread_cond_broadcast( &this->audio_cond );
 250                         pthread_mutex_unlock( &this->audio_mutex );
 251                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 252                 }
 253
 254                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 255                         SDL_Quit( );
 256
 257                 this->sdl_screen = NULL;
 258         }
 259
 260         return 0;
 261 }
 262
 263 int consumer_is_stopped( mlt_consumer parent )
 264 {
 265         consumer_sdl this = parent->child;
 266         return !this->running;
 267 }
 268
 269 static int sdl_lock_display( )
 270 {
 271         SDL_Surface *screen = SDL_GetVideoSurface( );
 272         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 273 }
 274
 275 static void sdl_unlock_display( )
 276 {
 277         SDL_Surface *screen = SDL_GetVideoSurface( );
 278         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 279                 SDL_UnlockSurface( screen );
 280 }
 281
 282 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 283 {
 284         consumer_sdl this = udata;
 285
 286         // Get the volume
 287         double volume = mlt_properties_get_double( this->properties, "volume" );
 288
 289         pthread_mutex_lock( &this->audio_mutex );
 290
 291         // Block until audio received
 292         while ( this->running && len > this->audio_avail )
 293                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 294
 295         if ( this->audio_avail >= len )
 296         {
 297                 // Place in the audio buffer
 298                 if ( volume != 1.0 )
 299                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 300                 else
 301                         memcpy( stream, this->audio_buffer, len );
 302
 303                 // Remove len from the audio available
 304                 this->audio_avail -= len;
 305
 306                 // Remove the samples
 307                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 308         }
 309         else
 310         {
 311                 // Just to be safe, wipe the stream first
 312                 memset( stream, 0, len );
 313
 314                 // Mix the audio
 315                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 316
 317                 // No audio left
 318                 this->audio_avail = 0;
 319         }
 320
 321         // We're definitely playing now
 322         this->playing = 1;
 323
 324         pthread_cond_broadcast( &this->audio_cond );
 325         pthread_mutex_unlock( &this->audio_mutex );
 326 }
 327
 328 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 329 {
 330         // Get the properties of this consumer
 331         mlt_properties properties = this->properties;
 332         mlt_audio_format afmt = mlt_audio_pcm;
 333
 334         // Set the preferred params of the test card signal
 335         int channels = mlt_properties_get_int( properties, "channels" );
 336         int frequency = mlt_properties_get_int( properties, "frequency" );
 337         static int counter = 0;
 338
 339         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 340
 341         int16_t *pcm;
 342         int bytes;
 343
 344         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 345         *duration = ( ( samples * 1000 ) / frequency );
 346
 347         if ( mlt_properties_get_int( properties, "audio_off" ) )
 348         {
 349                 this->playing = 1;
 350                 init_audio = 1;
 351                 return init_audio;
 352         }
 353
 354         if ( init_audio == 1 )
 355         {
 356                 SDL_AudioSpec request;
 357                 SDL_AudioSpec got;
 358
 359                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 360
 361                 // specify audio format
 362                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 363                 this->playing = 0;
 364                 request.freq = frequency;
 365                 request.format = AUDIO_S16SYS;
 366                 request.channels = channels;
 367                 request.samples = audio_buffer;
 368                 request.callback = sdl_fill_audio;
 369                 request.userdata = (void *)this;
 370                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 371                 {
 372                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 373                         init_audio = 2;
 374                 }
 375                 else if ( got.size != 0 )
 376                 {
 377                         SDL_PauseAudio( 0 );
 378                         init_audio = 0;
 379                 }
 380         }
 381
 382         if ( init_audio == 0 )
 383         {
 384                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 385                 bytes = ( samples * channels * 2 );
 386                 pthread_mutex_lock( &this->audio_mutex );
 387                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 388                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 389                 if ( this->running )
 390                 {
 391                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 392                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 393                         else
 394                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 395                         this->audio_avail += bytes;
 396                 }
 397                 pthread_cond_broadcast( &this->audio_cond );
 398                 pthread_mutex_unlock( &this->audio_mutex );
 399         }
 400         else
 401         {
 402                 this->playing = 1;
 403         }
 404
 405         return init_audio;
 406 }
 407
 408 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 409 {
 410         // Get the properties of this consumer
 411         mlt_properties properties = this->properties;
 412
 413         mlt_image_format vfmt = mlt_image_yuv422;
 414         int width = this->width, height = this->height;
 415         uint8_t *image;
 416         int changed = 0;
 417
 418         int video_off = mlt_properties_get_int( properties, "video_off" );
 419         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 420         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 421         int display_off = video_off | preview_off;
 422
 423         if ( this->running && display_off == 0 )
 424         {
 425                 // Get the image, width and height
 426                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 427                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 428                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 429
 430                 // Handle events
 431                 if ( this->sdl_screen != NULL )
 432                 {
 433                         SDL_Event event;
 434
 435                         sdl_lock_display( );
 436                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 437                         sdl_unlock_display( );
 438
 439                         while ( SDL_PollEvent( &event ) )
 440                         {
 441                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 442
 443                                 switch( event.type )
 444                                 {
 445                                         case SDL_VIDEORESIZE:
 446                                                 this->window_width = event.resize.w;
 447                                                 this->window_height = event.resize.h;
 448                                                 changed = 1;
 449                                                 break;
 450                                         case SDL_QUIT:
 451                                                 this->running = 0;
 452                                                 break;
 453                                         case SDL_KEYDOWN:
 454                                                 {
 455                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 456                                                         char keyboard[ 2 ] = " ";
 457                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 458                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 459                                                         {
 460                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 461                                                                 callback( producer, keyboard );
 462                                                         }
 463                                                 }
 464                                                 break;
 465                                 }
 466                         }
 467                 }
 468
 469                 sdl_lock_display();
 470
 471                 if ( width != this->width || height != this->height )
 472                 {
 473                         if ( this->sdl_overlay != NULL )
 474                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 475                         this->sdl_overlay = NULL;
 476                 }
 477
 478                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 479                 {
 480                         // Force an overlay recreation
 481                         if ( this->sdl_overlay != NULL )
 482                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 483                         this->sdl_overlay = NULL;
 484
 485                         // open SDL window with video overlay, if possible
 486                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 487                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 488                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 489                 }
 490
 491                 if ( this->running )
 492                 {
 493                         // Determine window's new display aspect ratio
 494                         double this_aspect = ( double )this->window_width / this->window_height;
 495
 496                         // Get the display aspect ratio
 497                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 498
 499                         // Determine frame's display aspect ratio
 500                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 501
 502                         // Store the width and height received
 503                         this->width = width;
 504                         this->height = height;
 505
 506                         // If using hardware scaler
 507                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 508                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 509                         {
 510                                 // Use hardware scaler to normalise display aspect ratio
 511                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 512                                 this->rect.h = this->window_height;
 513                                 if ( this->rect.w > this->window_width )
 514                                 {
 515                                         this->rect.w = this->window_width;
 516                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 517                                 }
 518                         }
 519                         // Special case optimisation to negate odd effect of sample aspect ratio
 520                         // not corresponding exactly with image resolution.
 521                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 522                         {
 523                                 this->rect.w = this->window_width;
 524                                 this->rect.h = this->window_height;
 525                         }
 526                         // Use hardware scaler to normalise sample aspect ratio
 527                         else if ( this->window_height * display_ratio > this->window_width )
 528                         {
 529                                 this->rect.w = this->window_width;
 530                                 this->rect.h = this->window_width / display_ratio;
 531                         }
 532                         else
 533                         {
 534                                 this->rect.w = this->window_height * display_ratio;
 535                                 this->rect.h = this->window_height;
 536                         }
 537
 538                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 539                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 540                         this->rect.x -= this->rect.x % 2;
 541
 542                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 543                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 544                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 545                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 546
 547                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 548                 }
 549
 550                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 551                 {
 552                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 553                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 554                 }
 555
 556                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 557                 {
 558                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 559                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 560                         {
 561                                 if ( image != NULL )
 562                                         memcpy( this->buffer, image, width * height * 2 );
 563                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 564                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 565                         }
 566                 }
 567
 568                 sdl_unlock_display();
 569         }
 570         else if ( this->running )
 571         {
 572                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 573                 if ( !video_off )
 574                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 575                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 576                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 577         }
 578
 579         return 0;
 580 }
 581
 582 static void *video_thread( void *arg )
 583 {
 584         // Identify the arg
 585         consumer_sdl this = arg;
 586
 587         // Obtain time of thread start
 588         struct timeval now;
 589         int64_t start = 0;
 590         int64_t elapsed = 0;
 591         struct timespec tm;
 592         mlt_frame next = NULL;
 593         mlt_properties properties = NULL;
 594         double speed = 0;
 595
 596         // Get real time flag
 597         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 598
 599         // Get the current time
 600         gettimeofday( &now, NULL );
 601
 602         // Determine start time
 603         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 604
 605         while ( this->running )
 606         {
 607                 // Pop the next frame
 608                 pthread_mutex_lock( &this->video_mutex );
 609                 next = mlt_deque_pop_front( this->queue );
 610                 while ( next == NULL && this->running )
 611                 {
 612                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 613                         next = mlt_deque_pop_front( this->queue );
 614                 }
 615                 pthread_mutex_unlock( &this->video_mutex );
 616
 617                 if ( !this->running || next == NULL ) break;
 618
 619                 // Get the properties
 620                 properties =  MLT_FRAME_PROPERTIES( next );
 621
 622                 // Get the speed of the frame
 623                 speed = mlt_properties_get_double( properties, "_speed" );
 624
 625                 // Get the current time
 626                 gettimeofday( &now, NULL );
 627
 628                 // Get the elapsed time
 629                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 630
 631                 // See if we have to delay the display of the current frame
 632                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 633                 {
 634                         // Obtain the scheduled playout time
 635                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 636
 637                         // Determine the difference between the elapsed time and the scheduled playout time
 638                         int64_t difference = scheduled - elapsed;
 639
 640                         // Smooth playback a bit
 641                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 642                         {
 643                                 tm.tv_sec = difference / 1000000;
 644                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 645                                 nanosleep( &tm, NULL );
 646                         }
 647
 648                         // Show current frame if not too old
 649                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 650                                 consumer_play_video( this, next );
 651
 652                         // If the queue is empty, recalculate start to allow build up again
 653                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 654                         {
 655                                 gettimeofday( &now, NULL );
 656                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 657                         }
 658                 }
 659
 660                 // This frame can now be closed
 661                 mlt_frame_close( next );
 662                 next = NULL;
 663         }
 664
 665         if ( next != NULL )
 666                 mlt_frame_close( next );
 667
 668         mlt_consumer_stopped( &this->parent );
 669
 670         return NULL;
 671 }
 672
 673 /** Threaded wrapper for pipe.
 674 */
 675
 676 static void *consumer_thread( void *arg )
 677 {
 678         // Identify the arg
 679         consumer_sdl this = arg;
 680
 681         // Get the consumer
 682         mlt_consumer consumer = &this->parent;
 683
 684         // Convenience functionality
 685         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 686         int terminated = 0;
 687
 688         // Video thread
 689         pthread_t thread;
 690
 691         // internal intialization
 692         int init_audio = 1;
 693         int init_video = 1;
 694         mlt_frame frame = NULL;
 695         mlt_properties properties = NULL;
 696         int duration = 0;
 697         int64_t playtime = 0;
 698         struct timespec tm = { 0, 100000 };
 699
 700         // Loop until told not to
 701         while( !terminated && this->running )
 702         {
 703                 // Get a frame from the attached producer
 704                 frame = mlt_consumer_rt_frame( consumer );
 705
 706                 // Check for termination
 707                 if ( terminate_on_pause && frame != NULL )
 708                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 709
 710                 // Ensure that we have a frame
 711                 if ( frame != NULL )
 712                 {
 713                         // Get the frame properties
 714                         properties =  MLT_FRAME_PROPERTIES( frame );
 715
 716                         // Play audio
 717                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 718
 719                         // Determine the start time now
 720                         if ( this->playing && init_video )
 721                         {
 722                                 // Create the video thread
 723                                 pthread_create( &thread, NULL, video_thread, this );
 724
 725                                 // Video doesn't need to be initialised any more
 726                                 init_video = 0;
 727                         }
 728
 729                         // Set playtime for this frame
 730                         mlt_properties_set_int( properties, "playtime", playtime );
 731
 732                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 733                                 nanosleep( &tm, NULL );
 734
 735                         // Push this frame to the back of the queue
 736                         pthread_mutex_lock( &this->video_mutex );
 737                         mlt_deque_push_back( this->queue, frame );
 738                         pthread_cond_broadcast( &this->video_cond );
 739                         pthread_mutex_unlock( &this->video_mutex );
 740
 741                         // Calculate the next playtime
 742                         playtime += ( duration * 1000 );
 743                 }
 744         }
 745
 746         this->running = 0;
 747
 748         // Kill the video thread
 749         if ( init_video == 0 )
 750         {
 751                 pthread_mutex_lock( &this->video_mutex );
 752                 pthread_cond_broadcast( &this->video_cond );
 753                 pthread_mutex_unlock( &this->video_mutex );
 754                 pthread_join( thread, NULL );
 755         }
 756
 757         while( mlt_deque_count( this->queue ) )
 758                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 759
 760         this->sdl_screen = NULL;
 761         this->audio_avail = 0;
 762
 763         return NULL;
 764 }
 765
 766 static int consumer_get_dimensions( int *width, int *height )
 767 {
 768         int changed = 0;
 769
 770         // SDL windows manager structure
 771         SDL_SysWMinfo wm;
 772
 773         // Specify the SDL Version
 774         SDL_VERSION( &wm.version );
 775
 776         // Lock the display
 777         //sdl_lock_display();
 778
 779 #ifndef __DARWIN__
 780         // Get the wm structure
 781         if ( SDL_GetWMInfo( &wm ) == 1 )
 782         {
 783                 // Check that we have the X11 wm
 784                 if ( wm.subsystem == SDL_SYSWM_X11 )
 785                 {
 786                         // Get the SDL window
 787                         Window window = wm.info.x11.window;
 788
 789                         // Get the display session
 790                         Display *display = wm.info.x11.display;
 791
 792                         // Get the window attributes
 793                         XWindowAttributes attr;
 794                         XGetWindowAttributes( display, window, &attr );
 795
 796                         // Determine whether window has changed
 797                         changed = *width != attr.width || *height != attr.height;
 798
 799                         // Return width and height
 800                         *width = attr.width;
 801                         *height = attr.height;
 802                 }
 803         }
 804 #endif
 805
 806         // Unlock the display
 807         //sdl_unlock_display();
 808
 809         return changed;
 810 }
 811
 812 /** Callback to allow override of the close method.
 813 */
 814
 815 static void consumer_close( mlt_consumer parent )
 816 {
 817         // Get the actual object
 818         consumer_sdl this = parent->child;
 819
 820         // Stop the consumer
 821         ///mlt_consumer_stop( parent );
 822
 823         // Now clean up the rest
 824         mlt_consumer_close( parent );
 825
 826         // Close the queue
 827         mlt_deque_close( this->queue );
 828
 829         // Destroy mutexes
 830         pthread_mutex_destroy( &this->audio_mutex );
 831         pthread_cond_destroy( &this->audio_cond );
 832
 833         // Finally clean up this
 834         free( this );
 835 }