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 <framework/mlt_consumer.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( mlt_profile profile, mlt_service_type type, const char *id, 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, profile ) == 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                 if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 182                         this->width = mlt_properties_get_int( this->properties, "width" );
 183                 if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 184                         this->height = mlt_properties_get_int( this->properties, "height" );
 185
 186                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 187
 188                 // Attach a colour space converter
 189                 if ( preview_off && !this->filtered )
 190                 {
 191                         mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( parent ) );
 192                         mlt_filter filter = mlt_factory_filter( profile, "avcolour_space", NULL );
 193                         if ( filter )
 194                         {
 195                                 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "forced", mlt_image_yuv422 );
 196                                 mlt_service_attach( MLT_CONSUMER_SERVICE( parent ), filter );
 197                                 mlt_filter_close( filter );
 198                         }
 199                         this->filtered = 1;
 200                 }
 201
 202                 if ( sdl_started == 0 && display_off == 0 )
 203                 {
 204                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 205                         {
 206                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 207                                 return -1;
 208                         }
 209
 210                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 211                         SDL_EnableUNICODE( 1 );
 212                 }
 213                 else if ( display_off == 0 )
 214                 {
 215                         this->sdl_screen = SDL_GetVideoSurface( );
 216                 }
 217
 218                 if ( audio_off == 0 )
 219                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 220
 221                 // Default window size
 222                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 223                 this->window_width = ( double )this->height * display_ratio;
 224                 this->window_height = this->height;
 225
 226                 if ( this->sdl_screen == NULL && display_off == 0 )
 227                 {
 228                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 229                         {
 230                                 const SDL_VideoInfo *vi = SDL_GetVideoInfo();
 231                                 this->window_width = vi->current_w;
 232                                 this->window_height = vi->current_h;
 233                                 this->sdl_flags |= SDL_FULLSCREEN;
 234                                 SDL_ShowCursor( SDL_DISABLE );
 235                         }
 236                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 237                 }
 238
 239                 pthread_create( &this->thread, NULL, consumer_thread, this );
 240         }
 241
 242         return 0;
 243 }
 244
 245 int consumer_stop( mlt_consumer parent )
 246 {
 247         // Get the actual object
 248         consumer_sdl this = parent->child;
 249
 250         if ( this->joined == 0 )
 251         {
 252                 // Kill the thread and clean up
 253                 this->joined = 1;
 254                 this->running = 0;
 255                 if ( this->thread )
 256                         pthread_join( this->thread, NULL );
 257
 258                 // internal cleanup
 259                 if ( this->sdl_overlay != NULL )
 260                         SDL_FreeYUVOverlay( this->sdl_overlay );
 261                 this->sdl_overlay = NULL;
 262
 263                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 264                 {
 265                         pthread_mutex_lock( &this->audio_mutex );
 266                         pthread_cond_broadcast( &this->audio_cond );
 267                         pthread_mutex_unlock( &this->audio_mutex );
 268                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 269                 }
 270
 271                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 272                         SDL_Quit( );
 273
 274                 this->sdl_screen = NULL;
 275         }
 276
 277         return 0;
 278 }
 279
 280 int consumer_is_stopped( mlt_consumer parent )
 281 {
 282         consumer_sdl this = parent->child;
 283         return !this->running;
 284 }
 285
 286 static int sdl_lock_display( )
 287 {
 288         SDL_Surface *screen = SDL_GetVideoSurface( );
 289         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 290 }
 291
 292 static void sdl_unlock_display( )
 293 {
 294         SDL_Surface *screen = SDL_GetVideoSurface( );
 295         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 296                 SDL_UnlockSurface( screen );
 297 }
 298
 299 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 300 {
 301         consumer_sdl this = udata;
 302
 303         // Get the volume
 304         double volume = mlt_properties_get_double( this->properties, "volume" );
 305
 306         pthread_mutex_lock( &this->audio_mutex );
 307
 308         // Block until audio received
 309         while ( this->running && len > this->audio_avail )
 310                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 311
 312         if ( this->audio_avail >= len )
 313         {
 314                 // Place in the audio buffer
 315                 if ( volume != 1.0 )
 316                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 317                 else
 318                         memcpy( stream, this->audio_buffer, len );
 319
 320                 // Remove len from the audio available
 321                 this->audio_avail -= len;
 322
 323                 // Remove the samples
 324                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 325         }
 326         else
 327         {
 328                 // Just to be safe, wipe the stream first
 329                 memset( stream, 0, len );
 330
 331                 // Mix the audio
 332                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 333
 334                 // No audio left
 335                 this->audio_avail = 0;
 336         }
 337
 338         // We're definitely playing now
 339         this->playing = 1;
 340
 341         pthread_cond_broadcast( &this->audio_cond );
 342         pthread_mutex_unlock( &this->audio_mutex );
 343 }
 344
 345 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 346 {
 347         // Get the properties of this consumer
 348         mlt_properties properties = this->properties;
 349         mlt_audio_format afmt = mlt_audio_pcm;
 350
 351         // Set the preferred params of the test card signal
 352         int channels = mlt_properties_get_int( properties, "channels" );
 353         int frequency = mlt_properties_get_int( properties, "frequency" );
 354         static int counter = 0;
 355
 356         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 357
 358         int16_t *pcm;
 359         int bytes;
 360
 361         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 362         *duration = ( ( samples * 1000 ) / frequency );
 363
 364         if ( mlt_properties_get_int( properties, "audio_off" ) )
 365         {
 366                 this->playing = 1;
 367                 init_audio = 1;
 368                 return init_audio;
 369         }
 370
 371         if ( init_audio == 1 )
 372         {
 373                 SDL_AudioSpec request;
 374                 SDL_AudioSpec got;
 375
 376                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 377
 378                 // specify audio format
 379                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 380                 this->playing = 0;
 381                 request.freq = frequency;
 382                 request.format = AUDIO_S16SYS;
 383                 request.channels = channels;
 384                 request.samples = audio_buffer;
 385                 request.callback = sdl_fill_audio;
 386                 request.userdata = (void *)this;
 387                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 388                 {
 389                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 390                         init_audio = 2;
 391                 }
 392                 else if ( got.size != 0 )
 393                 {
 394                         SDL_PauseAudio( 0 );
 395                         init_audio = 0;
 396                 }
 397         }
 398
 399         if ( init_audio == 0 )
 400         {
 401                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 402                 bytes = ( samples * channels * 2 );
 403                 pthread_mutex_lock( &this->audio_mutex );
 404                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 405                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 406                 if ( this->running )
 407                 {
 408                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 409                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 410                         else
 411                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 412                         this->audio_avail += bytes;
 413                 }
 414                 pthread_cond_broadcast( &this->audio_cond );
 415                 pthread_mutex_unlock( &this->audio_mutex );
 416         }
 417         else
 418         {
 419                 this->playing = 1;
 420         }
 421
 422         return init_audio;
 423 }
 424
 425 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 426 {
 427         // Get the properties of this consumer
 428         mlt_properties properties = this->properties;
 429
 430         mlt_image_format vfmt = mlt_image_yuv422;
 431         int width = this->width, height = this->height;
 432         uint8_t *image;
 433         int changed = 0;
 434
 435         int video_off = mlt_properties_get_int( properties, "video_off" );
 436         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 437         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 438         int display_off = video_off | preview_off;
 439
 440         if ( this->running && display_off == 0 )
 441         {
 442                 // Get the image, width and height
 443                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 444                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 445                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 446
 447                 // Handle events
 448                 if ( this->sdl_screen != NULL )
 449                 {
 450                         SDL_Event event;
 451
 452                         sdl_lock_display( );
 453                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 454                         sdl_unlock_display( );
 455
 456                         while ( SDL_PollEvent( &event ) )
 457                         {
 458                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 459
 460                                 switch( event.type )
 461                                 {
 462                                         case SDL_VIDEORESIZE:
 463                                                 this->window_width = event.resize.w;
 464                                                 this->window_height = event.resize.h;
 465                                                 changed = 1;
 466                                                 break;
 467                                         case SDL_QUIT:
 468                                                 this->running = 0;
 469                                                 break;
 470                                         case SDL_KEYDOWN:
 471                                                 {
 472                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 473                                                         char keyboard[ 2 ] = " ";
 474                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 475                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 476                                                         {
 477                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 478                                                                 callback( producer, keyboard );
 479                                                         }
 480                                                 }
 481                                                 break;
 482                                 }
 483                         }
 484                 }
 485
 486                 sdl_lock_display();
 487
 488                 if ( width != this->width || height != this->height )
 489                 {
 490                         if ( this->sdl_overlay != NULL )
 491                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 492                         this->sdl_overlay = NULL;
 493                 }
 494
 495                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 496                 {
 497                         // Force an overlay recreation
 498                         if ( this->sdl_overlay != NULL )
 499                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 500                         this->sdl_overlay = NULL;
 501
 502                         // open SDL window with video overlay, if possible
 503                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 504                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 505                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 506                 }
 507
 508                 if ( this->running )
 509                 {
 510                         // Determine window's new display aspect ratio
 511                         double this_aspect = ( double )this->window_width / this->window_height;
 512
 513                         // Get the display aspect ratio
 514                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 515
 516                         // Determine frame's display aspect ratio
 517                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 518
 519                         // Store the width and height received
 520                         this->width = width;
 521                         this->height = height;
 522
 523                         // If using hardware scaler
 524                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 525                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 526                         {
 527                                 // Use hardware scaler to normalise display aspect ratio
 528                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 529                                 this->rect.h = this->window_height;
 530                                 if ( this->rect.w > this->window_width )
 531                                 {
 532                                         this->rect.w = this->window_width;
 533                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 534                                 }
 535                         }
 536                         // Special case optimisation to negate odd effect of sample aspect ratio
 537                         // not corresponding exactly with image resolution.
 538                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 539                         {
 540                                 this->rect.w = this->window_width;
 541                                 this->rect.h = this->window_height;
 542                         }
 543                         // Use hardware scaler to normalise sample aspect ratio
 544                         else if ( this->window_height * display_ratio > this->window_width )
 545                         {
 546                                 this->rect.w = this->window_width;
 547                                 this->rect.h = this->window_width / display_ratio;
 548                         }
 549                         else
 550                         {
 551                                 this->rect.w = this->window_height * display_ratio;
 552                                 this->rect.h = this->window_height;
 553                         }
 554
 555                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 556                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 557                         this->rect.x -= this->rect.x % 2;
 558
 559                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 560                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 561                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 562                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 563
 564                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 565                 }
 566
 567                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 568                 {
 569                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 570                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 571                 }
 572
 573                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 574                 {
 575                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 576                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 577                         {
 578                                 if ( image != NULL )
 579                                         memcpy( this->buffer, image, width * height * 2 );
 580                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 581                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 582                         }
 583                 }
 584
 585                 sdl_unlock_display();
 586         }
 587         else if ( this->running )
 588         {
 589                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 590                 if ( !video_off )
 591                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 592                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 593                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 594         }
 595
 596         return 0;
 597 }
 598
 599 static void *video_thread( void *arg )
 600 {
 601         // Identify the arg
 602         consumer_sdl this = arg;
 603
 604         // Obtain time of thread start
 605         struct timeval now;
 606         int64_t start = 0;
 607         int64_t elapsed = 0;
 608         struct timespec tm;
 609         mlt_frame next = NULL;
 610         mlt_properties properties = NULL;
 611         double speed = 0;
 612
 613         // Get real time flag
 614         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 615
 616         // Get the current time
 617         gettimeofday( &now, NULL );
 618
 619         // Determine start time
 620         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 621
 622         while ( this->running )
 623         {
 624                 // Pop the next frame
 625                 pthread_mutex_lock( &this->video_mutex );
 626                 next = mlt_deque_pop_front( this->queue );
 627                 while ( next == NULL && this->running )
 628                 {
 629                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 630                         next = mlt_deque_pop_front( this->queue );
 631                 }
 632                 pthread_mutex_unlock( &this->video_mutex );
 633
 634                 if ( !this->running || next == NULL ) break;
 635
 636                 // Get the properties
 637                 properties =  MLT_FRAME_PROPERTIES( next );
 638
 639                 // Get the speed of the frame
 640                 speed = mlt_properties_get_double( properties, "_speed" );
 641
 642                 // Get the current time
 643                 gettimeofday( &now, NULL );
 644
 645                 // Get the elapsed time
 646                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 647
 648                 // See if we have to delay the display of the current frame
 649                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 650                 {
 651                         // Obtain the scheduled playout time
 652                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 653
 654                         // Determine the difference between the elapsed time and the scheduled playout time
 655                         int64_t difference = scheduled - elapsed;
 656
 657                         // Smooth playback a bit
 658                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 659                         {
 660                                 tm.tv_sec = difference / 1000000;
 661                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 662                                 nanosleep( &tm, NULL );
 663                         }
 664
 665                         // Show current frame if not too old
 666                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 667                                 consumer_play_video( this, next );
 668
 669                         // If the queue is empty, recalculate start to allow build up again
 670                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 671                         {
 672                                 gettimeofday( &now, NULL );
 673                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 674                         }
 675                 }
 676
 677                 // This frame can now be closed
 678                 mlt_frame_close( next );
 679                 next = NULL;
 680         }
 681
 682         if ( next != NULL )
 683                 mlt_frame_close( next );
 684
 685         mlt_consumer_stopped( &this->parent );
 686
 687         return NULL;
 688 }
 689
 690 /** Threaded wrapper for pipe.
 691 */
 692
 693 static void *consumer_thread( void *arg )
 694 {
 695         // Identify the arg
 696         consumer_sdl this = arg;
 697
 698         // Get the consumer
 699         mlt_consumer consumer = &this->parent;
 700
 701         // Convenience functionality
 702         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 703         int terminated = 0;
 704
 705         // Video thread
 706         pthread_t thread;
 707
 708         // internal intialization
 709         int init_audio = 1;
 710         int init_video = 1;
 711         mlt_frame frame = NULL;
 712         mlt_properties properties = NULL;
 713         int duration = 0;
 714         int64_t playtime = 0;
 715         struct timespec tm = { 0, 100000 };
 716
 717         // Loop until told not to
 718         while( !terminated && this->running )
 719         {
 720                 // Get a frame from the attached producer
 721                 frame = mlt_consumer_rt_frame( consumer );
 722
 723                 // Check for termination
 724                 if ( terminate_on_pause && frame != NULL )
 725                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 726
 727                 // Ensure that we have a frame
 728                 if ( frame != NULL )
 729                 {
 730                         // Get the frame properties
 731                         properties =  MLT_FRAME_PROPERTIES( frame );
 732
 733                         // Play audio
 734                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 735
 736                         // Determine the start time now
 737                         if ( this->playing && init_video )
 738                         {
 739                                 // Create the video thread
 740                                 pthread_create( &thread, NULL, video_thread, this );
 741
 742                                 // Video doesn't need to be initialised any more
 743                                 init_video = 0;
 744                         }
 745
 746                         // Set playtime for this frame
 747                         mlt_properties_set_int( properties, "playtime", playtime );
 748
 749                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 750                                 nanosleep( &tm, NULL );
 751
 752                         // Push this frame to the back of the queue
 753                         pthread_mutex_lock( &this->video_mutex );
 754                         mlt_deque_push_back( this->queue, frame );
 755                         pthread_cond_broadcast( &this->video_cond );
 756                         pthread_mutex_unlock( &this->video_mutex );
 757
 758                         // Calculate the next playtime
 759                         playtime += ( duration * 1000 );
 760                 }
 761         }
 762
 763         this->running = 0;
 764
 765         // Kill the video thread
 766         if ( init_video == 0 )
 767         {
 768                 pthread_mutex_lock( &this->video_mutex );
 769                 pthread_cond_broadcast( &this->video_cond );
 770                 pthread_mutex_unlock( &this->video_mutex );
 771                 pthread_join( thread, NULL );
 772         }
 773
 774         while( mlt_deque_count( this->queue ) )
 775                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 776
 777         this->sdl_screen = NULL;
 778         this->audio_avail = 0;
 779
 780         return NULL;
 781 }
 782
 783 static int consumer_get_dimensions( int *width, int *height )
 784 {
 785         int changed = 0;
 786
 787         // SDL windows manager structure
 788         SDL_SysWMinfo wm;
 789
 790         // Specify the SDL Version
 791         SDL_VERSION( &wm.version );
 792
 793         // Lock the display
 794         //sdl_lock_display();
 795
 796 #ifndef __DARWIN__
 797         // Get the wm structure
 798         if ( SDL_GetWMInfo( &wm ) == 1 )
 799         {
 800                 // Check that we have the X11 wm
 801                 if ( wm.subsystem == SDL_SYSWM_X11 )
 802                 {
 803                         // Get the SDL window
 804                         Window window = wm.info.x11.window;
 805
 806                         // Get the display session
 807                         Display *display = wm.info.x11.display;
 808
 809                         // Get the window attributes
 810                         XWindowAttributes attr;
 811                         XGetWindowAttributes( display, window, &attr );
 812
 813                         // Determine whether window has changed
 814                         changed = *width != attr.width || *height != attr.height;
 815
 816                         // Return width and height
 817                         *width = attr.width;
 818                         *height = attr.height;
 819                 }
 820         }
 821 #endif
 822
 823         // Unlock the display
 824         //sdl_unlock_display();
 825
 826         return changed;
 827 }
 828
 829 /** Callback to allow override of the close method.
 830 */
 831
 832 static void consumer_close( mlt_consumer parent )
 833 {
 834         // Get the actual object
 835         consumer_sdl this = parent->child;
 836
 837         // Stop the consumer
 838         ///mlt_consumer_stop( parent );
 839
 840         // Now clean up the rest
 841         mlt_consumer_close( parent );
 842
 843         // Close the queue
 844         mlt_deque_close( this->queue );
 845
 846         // Destroy mutexes
 847         pthread_mutex_destroy( &this->audio_mutex );
 848         pthread_cond_destroy( &this->audio_cond );
 849
 850         // Finally clean up this
 851         free( this );
 852 }