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 <framework/mlt_log.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <pthread.h>
  31 #include <SDL/SDL.h>
  32 #include <SDL/SDL_syswm.h>
  33 #include <sys/time.h>
  34
  35 /** This classes definition.
  36 */
  37
  38 typedef struct consumer_sdl_s *consumer_sdl;
  39
  40 struct consumer_sdl_s
  41 {
  42         struct mlt_consumer_s parent;
  43         mlt_properties properties;
  44         mlt_deque queue;
  45         pthread_t thread;
  46         int joined;
  47         int running;
  48         uint8_t audio_buffer[ 4096 * 10 ];
  49         int audio_avail;
  50         pthread_mutex_t audio_mutex;
  51         pthread_cond_t audio_cond;
  52         pthread_mutex_t video_mutex;
  53         pthread_cond_t video_cond;
  54         int window_width;
  55         int window_height;
  56         int previous_width;
  57         int previous_height;
  58         int width;
  59         int height;
  60         int playing;
  61         int sdl_flags;
  62         SDL_Surface *sdl_screen;
  63         SDL_Overlay *sdl_overlay;
  64         SDL_Rect rect;
  65         uint8_t *buffer;
  66         int bpp;
  67         int filtered;
  68 };
  69
  70 /** Forward references to static functions.
  71 */
  72
  73 static int consumer_start( mlt_consumer parent );
  74 static int consumer_stop( mlt_consumer parent );
  75 static int consumer_is_stopped( mlt_consumer parent );
  76 static void consumer_close( mlt_consumer parent );
  77 static void *consumer_thread( void * );
  78 static int consumer_get_dimensions( int *width, int *height );
  79 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  80
  81 /** This is what will be called by the factory - anything can be passed in
  82         via the argument, but keep it simple.
  83 */
  84
  85 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  86 {
  87         // Create the consumer object
  88         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  89
  90         // If no malloc'd and consumer init ok
  91         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  92         {
  93                 // Create the queue
  94                 this->queue = mlt_deque_init( );
  95
  96                 // Get the parent consumer object
  97                 mlt_consumer parent = &this->parent;
  98
  99                 // We have stuff to clean up, so override the close method
 100                 parent->close = consumer_close;
 101
 102                 // get a handle on properties
 103                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 104                 this->properties = MLT_SERVICE_PROPERTIES( service );
 105
 106                 // Set the default volume
 107                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 108
 109                 // This is the initialisation of the consumer
 110                 pthread_mutex_init( &this->audio_mutex, NULL );
 111                 pthread_cond_init( &this->audio_cond, NULL);
 112                 pthread_mutex_init( &this->video_mutex, NULL );
 113                 pthread_cond_init( &this->video_cond, NULL);
 114
 115                 // Default scaler (for now we'll use nearest)
 116                 mlt_properties_set( this->properties, "rescale", "nearest" );
 117
 118                 // Default buffer for low latency
 119                 mlt_properties_set_int( this->properties, "buffer", 1 );
 120
 121                 // Default audio buffer
 122                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 123
 124                 // Ensure we don't join on a non-running object
 125                 this->joined = 1;
 126
 127                 // process actual param
 128                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 129                 {
 130                         this->width = mlt_properties_get_int( this->properties, "width" );
 131                         this->height = mlt_properties_get_int( this->properties, "height" );
 132                 }
 133
 134                 // Set the sdl flags
 135                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 136
 137                 // Allow thread to be started/stopped
 138                 parent->start = consumer_start;
 139                 parent->stop = consumer_stop;
 140                 parent->is_stopped = consumer_is_stopped;
 141
 142                 // Register specific events
 143                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 144
 145                 // Return the consumer produced
 146                 return parent;
 147         }
 148
 149         // malloc or consumer init failed
 150         free( this );
 151
 152         // Indicate failure
 153         return NULL;
 154 }
 155
 156 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 157 {
 158         if ( listener != NULL )
 159                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 160 }
 161
 162 int consumer_start( mlt_consumer parent )
 163 {
 164         consumer_sdl this = parent->child;
 165
 166         if ( !this->running )
 167         {
 168                 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
 169                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 170                 int display_off = video_off | preview_off;
 171                 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
 172                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 173
 174                 consumer_stop( parent );
 175
 176                 this->running = 1;
 177                 this->joined = 0;
 178
 179                 if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 180                         this->width = mlt_properties_get_int( this->properties, "width" );
 181                 if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 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_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( parent ) );
 190                         mlt_filter filter = mlt_factory_filter( profile, "avcolour_space", NULL );
 191                         if ( filter )
 192                         {
 193                                 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "forced", mlt_image_yuv422 );
 194                                 mlt_service_attach( MLT_CONSUMER_SERVICE( parent ), filter );
 195                                 mlt_filter_close( filter );
 196                         }
 197                         this->filtered = 1;
 198                 }
 199
 200                 if ( sdl_started == 0 && display_off == 0 )
 201                 {
 202                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 203                         {
 204                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 205                                 return -1;
 206                         }
 207
 208                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 209                         SDL_EnableUNICODE( 1 );
 210                 }
 211                 else if ( display_off == 0 )
 212                 {
 213                         this->sdl_screen = SDL_GetVideoSurface( );
 214                 }
 215
 216                 if ( audio_off == 0 )
 217                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 218
 219                 // Default window size
 220                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 221                 this->window_width = ( double )this->height * display_ratio;
 222                 this->window_height = this->height;
 223
 224                 if ( this->sdl_screen == NULL && display_off == 0 )
 225                 {
 226                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 227                         {
 228                                 const SDL_VideoInfo *vi = SDL_GetVideoInfo();
 229                                 this->window_width = vi->current_w;
 230                                 this->window_height = vi->current_h;
 231                                 this->sdl_flags |= SDL_FULLSCREEN;
 232                                 SDL_ShowCursor( SDL_DISABLE );
 233                         }
 234                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 235                 }
 236
 237                 pthread_create( &this->thread, NULL, consumer_thread, this );
 238         }
 239
 240         return 0;
 241 }
 242
 243 int consumer_stop( mlt_consumer parent )
 244 {
 245         // Get the actual object
 246         consumer_sdl this = parent->child;
 247
 248         if ( this->joined == 0 )
 249         {
 250                 // Kill the thread and clean up
 251                 this->joined = 1;
 252                 this->running = 0;
 253                 if ( this->thread )
 254                         pthread_join( this->thread, NULL );
 255
 256                 // internal cleanup
 257                 if ( this->sdl_overlay != NULL )
 258                         SDL_FreeYUVOverlay( this->sdl_overlay );
 259                 this->sdl_overlay = NULL;
 260
 261                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 262                 {
 263                         pthread_mutex_lock( &this->audio_mutex );
 264                         pthread_cond_broadcast( &this->audio_cond );
 265                         pthread_mutex_unlock( &this->audio_mutex );
 266                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 267                 }
 268
 269                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 270                         SDL_Quit( );
 271
 272                 this->sdl_screen = NULL;
 273         }
 274
 275         return 0;
 276 }
 277
 278 int consumer_is_stopped( mlt_consumer parent )
 279 {
 280         consumer_sdl this = parent->child;
 281         return !this->running;
 282 }
 283
 284 static int sdl_lock_display( )
 285 {
 286         SDL_Surface *screen = SDL_GetVideoSurface( );
 287         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 288 }
 289
 290 static void sdl_unlock_display( )
 291 {
 292         SDL_Surface *screen = SDL_GetVideoSurface( );
 293         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 294                 SDL_UnlockSurface( screen );
 295 }
 296
 297 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 298 {
 299         consumer_sdl this = udata;
 300
 301         // Get the volume
 302         double volume = mlt_properties_get_double( this->properties, "volume" );
 303
 304         pthread_mutex_lock( &this->audio_mutex );
 305
 306         // Block until audio received
 307         while ( this->running && len > this->audio_avail )
 308                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 309
 310         if ( this->audio_avail >= len )
 311         {
 312                 // Place in the audio buffer
 313                 if ( volume != 1.0 )
 314                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 315                 else
 316                         memcpy( stream, this->audio_buffer, len );
 317
 318                 // Remove len from the audio available
 319                 this->audio_avail -= len;
 320
 321                 // Remove the samples
 322                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 323         }
 324         else
 325         {
 326                 // Just to be safe, wipe the stream first
 327                 memset( stream, 0, len );
 328
 329                 // Mix the audio
 330                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 331
 332                 // No audio left
 333                 this->audio_avail = 0;
 334         }
 335
 336         // We're definitely playing now
 337         this->playing = 1;
 338
 339         pthread_cond_broadcast( &this->audio_cond );
 340         pthread_mutex_unlock( &this->audio_mutex );
 341 }
 342
 343 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 344 {
 345         // Get the properties of this consumer
 346         mlt_properties properties = this->properties;
 347         mlt_audio_format afmt = mlt_audio_pcm;
 348
 349         // Set the preferred params of the test card signal
 350         int channels = mlt_properties_get_int( properties, "channels" );
 351         int frequency = mlt_properties_get_int( properties, "frequency" );
 352         static int counter = 0;
 353
 354         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 355
 356         int16_t *pcm;
 357         int bytes;
 358
 359         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 360         *duration = ( ( samples * 1000 ) / frequency );
 361
 362         if ( mlt_properties_get_int( properties, "audio_off" ) )
 363         {
 364                 this->playing = 1;
 365                 init_audio = 1;
 366                 return init_audio;
 367         }
 368
 369         if ( init_audio == 1 )
 370         {
 371                 SDL_AudioSpec request;
 372                 SDL_AudioSpec got;
 373
 374                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 375
 376                 // specify audio format
 377                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 378                 this->playing = 0;
 379                 request.freq = frequency;
 380                 request.format = AUDIO_S16SYS;
 381                 request.channels = channels;
 382                 request.samples = audio_buffer;
 383                 request.callback = sdl_fill_audio;
 384                 request.userdata = (void *)this;
 385                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 386                 {
 387                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 388                         init_audio = 2;
 389                 }
 390                 else if ( got.size != 0 )
 391                 {
 392                         SDL_PauseAudio( 0 );
 393                         init_audio = 0;
 394                 }
 395         }
 396
 397         if ( init_audio == 0 )
 398         {
 399                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 400                 bytes = ( samples * channels * 2 );
 401                 pthread_mutex_lock( &this->audio_mutex );
 402                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 403                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 404                 if ( this->running )
 405                 {
 406                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 407                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 408                         else
 409                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 410                         this->audio_avail += bytes;
 411                 }
 412                 pthread_cond_broadcast( &this->audio_cond );
 413                 pthread_mutex_unlock( &this->audio_mutex );
 414         }
 415         else
 416         {
 417                 this->playing = 1;
 418         }
 419
 420         return init_audio;
 421 }
 422
 423 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 424 {
 425         // Get the properties of this consumer
 426         mlt_properties properties = this->properties;
 427
 428         mlt_image_format vfmt = mlt_image_yuv422;
 429         int width = this->width, height = this->height;
 430         uint8_t *image;
 431         int changed = 0;
 432
 433         int video_off = mlt_properties_get_int( properties, "video_off" );
 434         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 435         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 436         int display_off = video_off | preview_off;
 437
 438         if ( this->running && display_off == 0 )
 439         {
 440                 // Get the image, width and height
 441                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 442                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 443                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 444
 445                 // Handle events
 446                 if ( this->sdl_screen != NULL )
 447                 {
 448                         SDL_Event event;
 449
 450                         sdl_lock_display( );
 451                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 452                         sdl_unlock_display( );
 453
 454                         while ( SDL_PollEvent( &event ) )
 455                         {
 456                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 457
 458                                 switch( event.type )
 459                                 {
 460                                         case SDL_VIDEORESIZE:
 461                                                 this->window_width = event.resize.w;
 462                                                 this->window_height = event.resize.h;
 463                                                 changed = 1;
 464                                                 break;
 465                                         case SDL_QUIT:
 466                                                 this->running = 0;
 467                                                 break;
 468                                         case SDL_KEYDOWN:
 469                                                 {
 470                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 471                                                         char keyboard[ 2 ] = " ";
 472                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 473                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 474                                                         {
 475                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 476                                                                 callback( producer, keyboard );
 477                                                         }
 478                                                 }
 479                                                 break;
 480                                 }
 481                         }
 482                 }
 483
 484                 sdl_lock_display();
 485
 486                 if ( width != this->width || height != this->height )
 487                 {
 488                         if ( this->sdl_overlay != NULL )
 489                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 490                         this->sdl_overlay = NULL;
 491                 }
 492
 493                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 494                 {
 495                         // Force an overlay recreation
 496                         if ( this->sdl_overlay != NULL )
 497                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 498                         this->sdl_overlay = NULL;
 499
 500                         // open SDL window with video overlay, if possible
 501                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 502                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 503                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 504
 505                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 506                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 507                         SDL_Flip( this->sdl_screen );
 508                 }
 509
 510                 if ( this->running )
 511                 {
 512                         // Determine window's new display aspect ratio
 513                         double this_aspect = ( double )this->window_width / this->window_height;
 514
 515                         // Get the display aspect ratio
 516                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 517
 518                         // Determine frame's display aspect ratio
 519                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 520
 521                         // Store the width and height received
 522                         this->width = width;
 523                         this->height = height;
 524
 525                         // If using hardware scaler
 526                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 527                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 528                         {
 529                                 // Use hardware scaler to normalise display aspect ratio
 530                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 531                                 this->rect.h = this->window_height;
 532                                 if ( this->rect.w > this->window_width )
 533                                 {
 534                                         this->rect.w = this->window_width;
 535                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 536                                 }
 537                         }
 538                         // Special case optimisation to negate odd effect of sample aspect ratio
 539                         // not corresponding exactly with image resolution.
 540                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 541                         {
 542                                 this->rect.w = this->window_width;
 543                                 this->rect.h = this->window_height;
 544                         }
 545                         // Use hardware scaler to normalise sample aspect ratio
 546                         else if ( this->window_height * display_ratio > this->window_width )
 547                         {
 548                                 this->rect.w = this->window_width;
 549                                 this->rect.h = this->window_width / display_ratio;
 550                         }
 551                         else
 552                         {
 553                                 this->rect.w = this->window_height * display_ratio;
 554                                 this->rect.h = this->window_height;
 555                         }
 556
 557                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 558                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 559                         this->rect.x -= this->rect.x % 2;
 560
 561                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 562                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 563                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 564                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 565
 566                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 567                 }
 568
 569                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 570                 {
 571                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 572                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 573                 }
 574
 575                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 576                 {
 577                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 578                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 579                         {
 580                                 if ( image != NULL )
 581                                         memcpy( this->buffer, image, width * height * 2 );
 582                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 583                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 584                         }
 585                 }
 586
 587                 sdl_unlock_display();
 588         }
 589         else if ( this->running )
 590         {
 591                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 592                 if ( !video_off )
 593                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 594                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 595                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 596         }
 597
 598         return 0;
 599 }
 600
 601 static void *video_thread( void *arg )
 602 {
 603         // Identify the arg
 604         consumer_sdl this = arg;
 605
 606         // Obtain time of thread start
 607         struct timeval now;
 608         int64_t start = 0;
 609         int64_t elapsed = 0;
 610         struct timespec tm;
 611         mlt_frame next = NULL;
 612         mlt_properties properties = NULL;
 613         double speed = 0;
 614
 615         // Get real time flag
 616         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 617
 618         // Get the current time
 619         gettimeofday( &now, NULL );
 620
 621         // Determine start time
 622         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 623
 624         while ( this->running )
 625         {
 626                 // Pop the next frame
 627                 pthread_mutex_lock( &this->video_mutex );
 628                 next = mlt_deque_pop_front( this->queue );
 629                 while ( next == NULL && this->running )
 630                 {
 631                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 632                         next = mlt_deque_pop_front( this->queue );
 633                 }
 634                 pthread_mutex_unlock( &this->video_mutex );
 635
 636                 if ( !this->running || next == NULL ) break;
 637
 638                 // Get the properties
 639                 properties =  MLT_FRAME_PROPERTIES( next );
 640
 641                 // Get the speed of the frame
 642                 speed = mlt_properties_get_double( properties, "_speed" );
 643
 644                 // Get the current time
 645                 gettimeofday( &now, NULL );
 646
 647                 // Get the elapsed time
 648                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 649
 650                 // See if we have to delay the display of the current frame
 651                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 652                 {
 653                         // Obtain the scheduled playout time
 654                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 655
 656                         // Determine the difference between the elapsed time and the scheduled playout time
 657                         int64_t difference = scheduled - elapsed;
 658
 659                         // Smooth playback a bit
 660                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 661                         {
 662                                 tm.tv_sec = difference / 1000000;
 663                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 664                                 nanosleep( &tm, NULL );
 665                         }
 666
 667                         // Show current frame if not too old
 668                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 669                                 consumer_play_video( this, next );
 670
 671                         // If the queue is empty, recalculate start to allow build up again
 672                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 673                         {
 674                                 gettimeofday( &now, NULL );
 675                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 676                         }
 677                 }
 678
 679                 // This frame can now be closed
 680                 mlt_frame_close( next );
 681                 next = NULL;
 682         }
 683
 684         if ( next != NULL )
 685                 mlt_frame_close( next );
 686
 687         mlt_consumer_stopped( &this->parent );
 688
 689         return NULL;
 690 }
 691
 692 /** Threaded wrapper for pipe.
 693 */
 694
 695 static void *consumer_thread( void *arg )
 696 {
 697         // Identify the arg
 698         consumer_sdl this = arg;
 699
 700         // Get the consumer
 701         mlt_consumer consumer = &this->parent;
 702
 703         // Convenience functionality
 704         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 705         int terminated = 0;
 706
 707         // Video thread
 708         pthread_t thread;
 709
 710         // internal intialization
 711         int init_audio = 1;
 712         int init_video = 1;
 713         mlt_frame frame = NULL;
 714         mlt_properties properties = NULL;
 715         int duration = 0;
 716         int64_t playtime = 0;
 717         struct timespec tm = { 0, 100000 };
 718
 719         // Loop until told not to
 720         while( !terminated && this->running )
 721         {
 722                 // Get a frame from the attached producer
 723                 frame = mlt_consumer_rt_frame( consumer );
 724
 725                 // Check for termination
 726                 if ( terminate_on_pause && frame != NULL )
 727                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 728
 729                 // Ensure that we have a frame
 730                 if ( frame != NULL )
 731                 {
 732                         // Get the frame properties
 733                         properties =  MLT_FRAME_PROPERTIES( frame );
 734
 735                         // Play audio
 736                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 737
 738                         // Determine the start time now
 739                         if ( this->playing && init_video )
 740                         {
 741                                 // Create the video thread
 742                                 pthread_create( &thread, NULL, video_thread, this );
 743
 744                                 // Video doesn't need to be initialised any more
 745                                 init_video = 0;
 746                         }
 747
 748                         // Set playtime for this frame
 749                         mlt_properties_set_int( properties, "playtime", playtime );
 750
 751                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 752                                 nanosleep( &tm, NULL );
 753
 754                         // Push this frame to the back of the queue
 755                         pthread_mutex_lock( &this->video_mutex );
 756                         mlt_deque_push_back( this->queue, frame );
 757                         pthread_cond_broadcast( &this->video_cond );
 758                         pthread_mutex_unlock( &this->video_mutex );
 759
 760                         // Calculate the next playtime
 761                         playtime += ( duration * 1000 );
 762                 }
 763         }
 764
 765         this->running = 0;
 766
 767         // Kill the video thread
 768         if ( init_video == 0 )
 769         {
 770                 pthread_mutex_lock( &this->video_mutex );
 771                 pthread_cond_broadcast( &this->video_cond );
 772                 pthread_mutex_unlock( &this->video_mutex );
 773                 pthread_join( thread, NULL );
 774         }
 775
 776         while( mlt_deque_count( this->queue ) )
 777                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 778
 779         this->sdl_screen = NULL;
 780         this->audio_avail = 0;
 781
 782         return NULL;
 783 }
 784
 785 static int consumer_get_dimensions( int *width, int *height )
 786 {
 787         int changed = 0;
 788
 789         // SDL windows manager structure
 790         SDL_SysWMinfo wm;
 791
 792         // Specify the SDL Version
 793         SDL_VERSION( &wm.version );
 794
 795         // Lock the display
 796         //sdl_lock_display();
 797
 798 #ifndef __DARWIN__
 799         // Get the wm structure
 800         if ( SDL_GetWMInfo( &wm ) == 1 )
 801         {
 802                 // Check that we have the X11 wm
 803                 if ( wm.subsystem == SDL_SYSWM_X11 )
 804                 {
 805                         // Get the SDL window
 806                         Window window = wm.info.x11.window;
 807
 808                         // Get the display session
 809                         Display *display = wm.info.x11.display;
 810
 811                         // Get the window attributes
 812                         XWindowAttributes attr;
 813                         XGetWindowAttributes( display, window, &attr );
 814
 815                         // Determine whether window has changed
 816                         changed = *width != attr.width || *height != attr.height;
 817
 818                         // Return width and height
 819                         *width = attr.width;
 820                         *height = attr.height;
 821                 }
 822         }
 823 #endif
 824
 825         // Unlock the display
 826         //sdl_unlock_display();
 827
 828         return changed;
 829 }
 830
 831 /** Callback to allow override of the close method.
 832 */
 833
 834 static void consumer_close( mlt_consumer parent )
 835 {
 836         // Get the actual object
 837         consumer_sdl this = parent->child;
 838
 839         // Stop the consumer
 840         ///mlt_consumer_stop( parent );
 841
 842         // Now clean up the rest
 843         mlt_consumer_close( parent );
 844
 845         // Close the queue
 846         mlt_deque_close( this->queue );
 847
 848         // Destroy mutexes
 849         pthread_mutex_destroy( &this->audio_mutex );
 850         pthread_cond_destroy( &this->audio_cond );
 851
 852         // Finally clean up this
 853         free( this );
 854 }