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                 // Default display aspect ratio
 106                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 107
 108                 // Set the default volume
 109                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 110
 111                 // This is the initialisation of the consumer
 112                 pthread_mutex_init( &this->audio_mutex, NULL );
 113                 pthread_cond_init( &this->audio_cond, NULL);
 114                 pthread_mutex_init( &this->video_mutex, NULL );
 115                 pthread_cond_init( &this->video_cond, NULL);
 116
 117                 // Default scaler (for now we'll use nearest)
 118                 mlt_properties_set( this->properties, "rescale", "nearest" );
 119
 120                 // Default buffer for low latency
 121                 mlt_properties_set_int( this->properties, "buffer", 1 );
 122
 123                 // Default progressive true
 124                 mlt_properties_set_int( this->properties, "progressive", 0 );
 125
 126                 // Default audio buffer
 127                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 128
 129                 // Ensure we don't join on a non-running object
 130                 this->joined = 1;
 131
 132                 // process actual param
 133                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 134                 {
 135                         this->width = mlt_properties_get_int( this->properties, "width" );
 136                         this->height = mlt_properties_get_int( this->properties, "height" );
 137                 }
 138
 139                 // Default window size
 140                 this->window_width = ( double )this->height * display_ratio;
 141                 this->window_height = this->height;
 142
 143                 // Set the sdl flags
 144                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 145
 146                 // Allow thread to be started/stopped
 147                 parent->start = consumer_start;
 148                 parent->stop = consumer_stop;
 149                 parent->is_stopped = consumer_is_stopped;
 150
 151                 // Register specific events
 152                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 153
 154                 // Return the consumer produced
 155                 return parent;
 156         }
 157
 158         // malloc or consumer init failed
 159         free( this );
 160
 161         // Indicate failure
 162         return NULL;
 163 }
 164
 165 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 166 {
 167         if ( listener != NULL )
 168                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 169 }
 170
 171 int consumer_start( mlt_consumer parent )
 172 {
 173         consumer_sdl this = parent->child;
 174
 175         if ( !this->running )
 176         {
 177                 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
 178                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 179                 int display_off = video_off | preview_off;
 180                 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
 181                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 182
 183                 consumer_stop( parent );
 184
 185                 this->running = 1;
 186                 this->joined = 0;
 187
 188                 this->width = mlt_properties_get_int( this->properties, "width" );
 189                 this->height = mlt_properties_get_int( this->properties, "height" );
 190
 191                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 192
 193                 // Attach a colour space converter
 194                 if ( preview_off && !this->filtered )
 195                 {
 196                         mlt_filter filter = mlt_factory_filter( "avcolour_space", NULL );
 197                         mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "forced", mlt_image_yuv422 );
 198                         mlt_service_attach( MLT_CONSUMER_SERVICE( parent ), filter );
 199                         mlt_filter_close( filter );
 200                         this->filtered = 1;
 201                 }
 202
 203                 if ( sdl_started == 0 && display_off == 0 )
 204                 {
 205                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 206                         {
 207                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 208                                 return -1;
 209                         }
 210
 211                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 212                         SDL_EnableUNICODE( 1 );
 213                 }
 214                 else if ( display_off == 0 )
 215                 {
 216                         this->sdl_screen = SDL_GetVideoSurface( );
 217                 }
 218
 219                 if ( audio_off == 0 )
 220                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 221
 222                 if ( this->sdl_screen == NULL && display_off == 0 )
 223                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 224
 225                 pthread_create( &this->thread, NULL, consumer_thread, this );
 226         }
 227
 228         return 0;
 229 }
 230
 231 int consumer_stop( mlt_consumer parent )
 232 {
 233         // Get the actual object
 234         consumer_sdl this = parent->child;
 235
 236         if ( this->joined == 0 )
 237         {
 238                 // Kill the thread and clean up
 239                 this->joined = 1;
 240                 this->running = 0;
 241                 pthread_join( this->thread, NULL );
 242
 243                 // internal cleanup
 244                 if ( this->sdl_overlay != NULL )
 245                         SDL_FreeYUVOverlay( this->sdl_overlay );
 246                 this->sdl_overlay = NULL;
 247
 248                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 249                 {
 250                         pthread_mutex_lock( &this->audio_mutex );
 251                         pthread_cond_broadcast( &this->audio_cond );
 252                         pthread_mutex_unlock( &this->audio_mutex );
 253                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 254                 }
 255
 256                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 257                         SDL_Quit( );
 258
 259                 this->sdl_screen = NULL;
 260         }
 261
 262         return 0;
 263 }
 264
 265 int consumer_is_stopped( mlt_consumer parent )
 266 {
 267         consumer_sdl this = parent->child;
 268         return !this->running;
 269 }
 270
 271 static int sdl_lock_display( )
 272 {
 273         SDL_Surface *screen = SDL_GetVideoSurface( );
 274         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 275 }
 276
 277 static void sdl_unlock_display( )
 278 {
 279         SDL_Surface *screen = SDL_GetVideoSurface( );
 280         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 281                 SDL_UnlockSurface( screen );
 282 }
 283
 284 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 285 {
 286         consumer_sdl this = udata;
 287
 288         // Get the volume
 289         double volume = mlt_properties_get_double( this->properties, "volume" );
 290
 291         pthread_mutex_lock( &this->audio_mutex );
 292
 293         // Block until audio received
 294         while ( this->running && len > this->audio_avail )
 295                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 296
 297         if ( this->audio_avail >= len )
 298         {
 299                 // Place in the audio buffer
 300                 if ( volume != 1.0 )
 301                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 302                 else
 303                         memcpy( stream, this->audio_buffer, len );
 304
 305                 // Remove len from the audio available
 306                 this->audio_avail -= len;
 307
 308                 // Remove the samples
 309                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 310         }
 311         else
 312         {
 313                 // Just to be safe, wipe the stream first
 314                 memset( stream, 0, len );
 315
 316                 // Mix the audio
 317                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 318
 319                 // No audio left
 320                 this->audio_avail = 0;
 321         }
 322
 323         // We're definitely playing now
 324         this->playing = 1;
 325
 326         pthread_cond_broadcast( &this->audio_cond );
 327         pthread_mutex_unlock( &this->audio_mutex );
 328 }
 329
 330 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 331 {
 332         // Get the properties of this consumer
 333         mlt_properties properties = this->properties;
 334         mlt_audio_format afmt = mlt_audio_pcm;
 335
 336         // Set the preferred params of the test card signal
 337         int channels = mlt_properties_get_int( properties, "channels" );
 338         int frequency = mlt_properties_get_int( properties, "frequency" );
 339         static int counter = 0;
 340
 341         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 342
 343         int16_t *pcm;
 344         int bytes;
 345
 346         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 347         *duration = ( ( samples * 1000 ) / frequency );
 348
 349         if ( mlt_properties_get_int( properties, "audio_off" ) )
 350         {
 351                 this->playing = 1;
 352                 init_audio = 1;
 353                 return init_audio;
 354         }
 355
 356         if ( init_audio == 1 )
 357         {
 358                 SDL_AudioSpec request;
 359                 SDL_AudioSpec got;
 360
 361                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 362
 363                 // specify audio format
 364                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 365                 this->playing = 0;
 366                 request.freq = frequency;
 367                 request.format = AUDIO_S16SYS;
 368                 request.channels = channels;
 369                 request.samples = audio_buffer;
 370                 request.callback = sdl_fill_audio;
 371                 request.userdata = (void *)this;
 372                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 373                 {
 374                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 375                         init_audio = 2;
 376                 }
 377                 else if ( got.size != 0 )
 378                 {
 379                         SDL_PauseAudio( 0 );
 380                         init_audio = 0;
 381                 }
 382         }
 383
 384         if ( init_audio == 0 )
 385         {
 386                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 387                 bytes = ( samples * channels * 2 );
 388                 pthread_mutex_lock( &this->audio_mutex );
 389                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 390                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 391                 if ( this->running )
 392                 {
 393                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 394                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 395                         else
 396                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 397                         this->audio_avail += bytes;
 398                 }
 399                 pthread_cond_broadcast( &this->audio_cond );
 400                 pthread_mutex_unlock( &this->audio_mutex );
 401         }
 402         else
 403         {
 404                 this->playing = 1;
 405         }
 406
 407         return init_audio;
 408 }
 409
 410 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 411 {
 412         // Get the properties of this consumer
 413         mlt_properties properties = this->properties;
 414
 415         mlt_image_format vfmt = mlt_image_yuv422;
 416         int width = this->width, height = this->height;
 417         uint8_t *image;
 418         int changed = 0;
 419
 420         int video_off = mlt_properties_get_int( properties, "video_off" );
 421         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 422         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 423         int display_off = video_off | preview_off;
 424
 425         if ( this->running && display_off == 0 )
 426         {
 427                 // Get the image, width and height
 428                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 429                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 430                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 431
 432                 // Handle events
 433                 if ( this->sdl_screen != NULL )
 434                 {
 435                         SDL_Event event;
 436
 437                         sdl_lock_display( );
 438                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 439                         sdl_unlock_display( );
 440
 441                         while ( SDL_PollEvent( &event ) )
 442                         {
 443                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 444
 445                                 switch( event.type )
 446                                 {
 447                                         case SDL_VIDEORESIZE:
 448                                                 this->window_width = event.resize.w;
 449                                                 this->window_height = event.resize.h;
 450                                                 changed = 1;
 451                                                 break;
 452                                         case SDL_QUIT:
 453                                                 this->running = 0;
 454                                                 break;
 455                                         case SDL_KEYDOWN:
 456                                                 {
 457                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 458                                                         char keyboard[ 2 ] = " ";
 459                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 460                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 461                                                         {
 462                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 463                                                                 callback( producer, keyboard );
 464                                                         }
 465                                                 }
 466                                                 break;
 467                                 }
 468                         }
 469                 }
 470
 471                 sdl_lock_display();
 472
 473                 if ( width != this->width || height != this->height )
 474                 {
 475                         if ( this->sdl_overlay != NULL )
 476                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 477                         this->sdl_overlay = NULL;
 478                 }
 479
 480                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 481                 {
 482                         // Force an overlay recreation
 483                         if ( this->sdl_overlay != NULL )
 484                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 485                         this->sdl_overlay = NULL;
 486
 487                         // open SDL window with video overlay, if possible
 488                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 489                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 490                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 491                 }
 492
 493                 if ( this->running )
 494                 {
 495                         // Determine window's new display aspect ratio
 496                         double this_aspect = ( double )this->window_width / this->window_height;
 497
 498                         // Get the display aspect ratio
 499                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 500
 501                         // Determine frame's display aspect ratio
 502                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 503
 504                         // Store the width and height received
 505                         this->width = width;
 506                         this->height = height;
 507
 508                         // If using hardware scaler
 509                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 510                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 511                         {
 512                                 // Use hardware scaler to normalise display aspect ratio
 513                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 514                                 this->rect.h = this->window_height;
 515                                 if ( this->rect.w > this->window_width )
 516                                 {
 517                                         this->rect.w = this->window_width;
 518                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 519                                 }
 520                         }
 521                         // Special case optimisation to negate odd effect of sample aspect ratio
 522                         // not corresponding exactly with image resolution.
 523                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 524                         {
 525                                 this->rect.w = this->window_width;
 526                                 this->rect.h = this->window_height;
 527                         }
 528                         // Use hardware scaler to normalise sample aspect ratio
 529                         else if ( this->window_height * display_ratio > this->window_width )
 530                         {
 531                                 this->rect.w = this->window_width;
 532                                 this->rect.h = this->window_width / display_ratio;
 533                         }
 534                         else
 535                         {
 536                                 this->rect.w = this->window_height * display_ratio;
 537                                 this->rect.h = this->window_height;
 538                         }
 539
 540                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 541                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 542                         this->rect.x -= this->rect.x % 2;
 543
 544                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 545                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 546                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 547                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 548
 549                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 550                 }
 551
 552                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 553                 {
 554                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 555                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 556                 }
 557
 558                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 559                 {
 560                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 561                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 562                         {
 563                                 if ( image != NULL )
 564                                         memcpy( this->buffer, image, width * height * 2 );
 565                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 566                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 567                         }
 568                 }
 569
 570                 sdl_unlock_display();
 571         }
 572         else if ( this->running )
 573         {
 574                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 575                 if ( !video_off )
 576                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 577                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 578                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 579         }
 580
 581         return 0;
 582 }
 583
 584 static void *video_thread( void *arg )
 585 {
 586         // Identify the arg
 587         consumer_sdl this = arg;
 588
 589         // Obtain time of thread start
 590         struct timeval now;
 591         int64_t start = 0;
 592         int64_t elapsed = 0;
 593         struct timespec tm;
 594         mlt_frame next = NULL;
 595         mlt_properties properties = NULL;
 596         double speed = 0;
 597
 598         // Get real time flag
 599         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 600
 601         // Get the current time
 602         gettimeofday( &now, NULL );
 603
 604         // Determine start time
 605         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 606
 607         while ( this->running )
 608         {
 609                 // Pop the next frame
 610                 pthread_mutex_lock( &this->video_mutex );
 611                 next = mlt_deque_pop_front( this->queue );
 612                 while ( next == NULL && this->running )
 613                 {
 614                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 615                         next = mlt_deque_pop_front( this->queue );
 616                 }
 617                 pthread_mutex_unlock( &this->video_mutex );
 618
 619                 if ( !this->running || next == NULL ) break;
 620
 621                 // Get the properties
 622                 properties =  MLT_FRAME_PROPERTIES( next );
 623
 624                 // Get the speed of the frame
 625                 speed = mlt_properties_get_double( properties, "_speed" );
 626
 627                 // Get the current time
 628                 gettimeofday( &now, NULL );
 629
 630                 // Get the elapsed time
 631                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 632
 633                 // See if we have to delay the display of the current frame
 634                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 635                 {
 636                         // Obtain the scheduled playout time
 637                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 638
 639                         // Determine the difference between the elapsed time and the scheduled playout time
 640                         int64_t difference = scheduled - elapsed;
 641
 642                         // Smooth playback a bit
 643                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 644                         {
 645                                 tm.tv_sec = difference / 1000000;
 646                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 647                                 nanosleep( &tm, NULL );
 648                         }
 649
 650                         // Show current frame if not too old
 651                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 652                                 consumer_play_video( this, next );
 653
 654                         // If the queue is empty, recalculate start to allow build up again
 655                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 656                         {
 657                                 gettimeofday( &now, NULL );
 658                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 659                         }
 660                 }
 661
 662                 // This frame can now be closed
 663                 mlt_frame_close( next );
 664                 next = NULL;
 665         }
 666
 667         if ( next != NULL )
 668                 mlt_frame_close( next );
 669
 670         mlt_consumer_stopped( &this->parent );
 671
 672         return NULL;
 673 }
 674
 675 /** Threaded wrapper for pipe.
 676 */
 677
 678 static void *consumer_thread( void *arg )
 679 {
 680         // Identify the arg
 681         consumer_sdl this = arg;
 682
 683         // Get the consumer
 684         mlt_consumer consumer = &this->parent;
 685
 686         // Convenience functionality
 687         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 688         int terminated = 0;
 689
 690         // Video thread
 691         pthread_t thread;
 692
 693         // internal intialization
 694         int init_audio = 1;
 695         int init_video = 1;
 696         mlt_frame frame = NULL;
 697         mlt_properties properties = NULL;
 698         int duration = 0;
 699         int64_t playtime = 0;
 700         struct timespec tm = { 0, 100000 };
 701
 702         // Loop until told not to
 703         while( !terminated && this->running )
 704         {
 705                 // Get a frame from the attached producer
 706                 frame = mlt_consumer_rt_frame( consumer );
 707
 708                 // Check for termination
 709                 if ( terminate_on_pause && frame != NULL )
 710                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 711
 712                 // Ensure that we have a frame
 713                 if ( frame != NULL )
 714                 {
 715                         // Get the frame properties
 716                         properties =  MLT_FRAME_PROPERTIES( frame );
 717
 718                         // Play audio
 719                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 720
 721                         // Determine the start time now
 722                         if ( this->playing && init_video )
 723                         {
 724                                 // Create the video thread
 725                                 pthread_create( &thread, NULL, video_thread, this );
 726
 727                                 // Video doesn't need to be initialised any more
 728                                 init_video = 0;
 729                         }
 730
 731                         // Set playtime for this frame
 732                         mlt_properties_set_int( properties, "playtime", playtime );
 733
 734                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 735                                 nanosleep( &tm, NULL );
 736
 737                         // Push this frame to the back of the queue
 738                         pthread_mutex_lock( &this->video_mutex );
 739                         mlt_deque_push_back( this->queue, frame );
 740                         pthread_cond_broadcast( &this->video_cond );
 741                         pthread_mutex_unlock( &this->video_mutex );
 742
 743                         // Calculate the next playtime
 744                         playtime += ( duration * 1000 );
 745                 }
 746         }
 747
 748         this->running = 0;
 749
 750         // Kill the video thread
 751         if ( init_video == 0 )
 752         {
 753                 pthread_mutex_lock( &this->video_mutex );
 754                 pthread_cond_broadcast( &this->video_cond );
 755                 pthread_mutex_unlock( &this->video_mutex );
 756                 pthread_join( thread, NULL );
 757         }
 758
 759         while( mlt_deque_count( this->queue ) )
 760                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 761
 762         this->sdl_screen = NULL;
 763         this->audio_avail = 0;
 764
 765         return NULL;
 766 }
 767
 768 static int consumer_get_dimensions( int *width, int *height )
 769 {
 770         int changed = 0;
 771
 772         // SDL windows manager structure
 773         SDL_SysWMinfo wm;
 774
 775         // Specify the SDL Version
 776         SDL_VERSION( &wm.version );
 777
 778         // Lock the display
 779         //sdl_lock_display();
 780
 781 #ifndef __DARWIN__
 782         // Get the wm structure
 783         if ( SDL_GetWMInfo( &wm ) == 1 )
 784         {
 785                 // Check that we have the X11 wm
 786                 if ( wm.subsystem == SDL_SYSWM_X11 )
 787                 {
 788                         // Get the SDL window
 789                         Window window = wm.info.x11.window;
 790
 791                         // Get the display session
 792                         Display *display = wm.info.x11.display;
 793
 794                         // Get the window attributes
 795                         XWindowAttributes attr;
 796                         XGetWindowAttributes( display, window, &attr );
 797
 798                         // Determine whether window has changed
 799                         changed = *width != attr.width || *height != attr.height;
 800
 801                         // Return width and height
 802                         *width = attr.width;
 803                         *height = attr.height;
 804                 }
 805         }
 806 #endif
 807
 808         // Unlock the display
 809         //sdl_unlock_display();
 810
 811         return changed;
 812 }
 813
 814 /** Callback to allow override of the close method.
 815 */
 816
 817 static void consumer_close( mlt_consumer parent )
 818 {
 819         // Get the actual object
 820         consumer_sdl this = parent->child;
 821
 822         // Stop the consumer
 823         ///mlt_consumer_stop( parent );
 824
 825         // Now clean up the rest
 826         mlt_consumer_close( parent );
 827
 828         // Close the queue
 829         mlt_deque_close( this->queue );
 830
 831         // Destroy mutexes
 832         pthread_mutex_destroy( &this->audio_mutex );
 833         pthread_cond_destroy( &this->audio_cond );
 834
 835         // Finally clean up this
 836         free( this );
 837 }