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 extern pthread_mutex_t mlt_sdl_mutex;
  36
  37 /** This classes definition.
  38 */
  39
  40 typedef struct consumer_sdl_s *consumer_sdl;
  41
  42 struct consumer_sdl_s
  43 {
  44         struct mlt_consumer_s parent;
  45         mlt_properties properties;
  46         mlt_deque queue;
  47         pthread_t thread;
  48         int joined;
  49         int running;
  50         uint8_t audio_buffer[ 4096 * 10 ];
  51         int audio_avail;
  52         pthread_mutex_t audio_mutex;
  53         pthread_cond_t audio_cond;
  54         pthread_mutex_t video_mutex;
  55         pthread_cond_t video_cond;
  56         int window_width;
  57         int window_height;
  58         int previous_width;
  59         int previous_height;
  60         int width;
  61         int height;
  62         int playing;
  63         int sdl_flags;
  64         SDL_Surface *sdl_screen;
  65         SDL_Overlay *sdl_overlay;
  66         SDL_Rect rect;
  67         uint8_t *buffer;
  68         int bpp;
  69 };
  70
  71 /** Forward references to static functions.
  72 */
  73
  74 static int consumer_start( mlt_consumer parent );
  75 static int consumer_stop( mlt_consumer parent );
  76 static int consumer_is_stopped( mlt_consumer parent );
  77 static void consumer_close( mlt_consumer parent );
  78 static void *consumer_thread( void * );
  79 static int consumer_get_dimensions( int *width, int *height );
  80 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  81
  82 /** This is what will be called by the factory - anything can be passed in
  83         via the argument, but keep it simple.
  84 */
  85
  86 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  87 {
  88         // Create the consumer object
  89         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  90
  91         // If no malloc'd and consumer init ok
  92         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  93         {
  94                 // Create the queue
  95                 this->queue = mlt_deque_init( );
  96
  97                 // Get the parent consumer object
  98                 mlt_consumer parent = &this->parent;
  99
 100                 // We have stuff to clean up, so override the close method
 101                 parent->close = consumer_close;
 102
 103                 // get a handle on properties
 104                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 105                 this->properties = MLT_SERVICE_PROPERTIES( service );
 106
 107                 // Set the default volume
 108                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 109
 110                 // This is the initialisation of the consumer
 111                 pthread_mutex_init( &this->audio_mutex, NULL );
 112                 pthread_cond_init( &this->audio_cond, NULL);
 113                 pthread_mutex_init( &this->video_mutex, NULL );
 114                 pthread_cond_init( &this->video_cond, NULL);
 115
 116                 // Default scaler (for now we'll use nearest)
 117                 mlt_properties_set( this->properties, "rescale", "nearest" );
 118
 119                 // Default buffer for low latency
 120                 mlt_properties_set_int( this->properties, "buffer", 1 );
 121
 122                 // Default audio buffer
 123                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 124
 125                 // Ensure we don't join on a non-running object
 126                 this->joined = 1;
 127
 128                 // process actual param
 129                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 130                 {
 131                         this->width = mlt_properties_get_int( this->properties, "width" );
 132                         this->height = mlt_properties_get_int( this->properties, "height" );
 133                 }
 134
 135                 // Set the sdl flags
 136                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 137
 138                 // Allow thread to be started/stopped
 139                 parent->start = consumer_start;
 140                 parent->stop = consumer_stop;
 141                 parent->is_stopped = consumer_is_stopped;
 142
 143                 // Register specific events
 144                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 145
 146                 // Return the consumer produced
 147                 return parent;
 148         }
 149
 150         // malloc or consumer init failed
 151         free( this );
 152
 153         // Indicate failure
 154         return NULL;
 155 }
 156
 157 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 158 {
 159         if ( listener != NULL )
 160                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 161 }
 162
 163 int consumer_start( mlt_consumer parent )
 164 {
 165         consumer_sdl this = parent->child;
 166
 167         if ( !this->running )
 168         {
 169                 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
 170                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 171                 int display_off = video_off | preview_off;
 172                 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
 173                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 174
 175                 consumer_stop( parent );
 176
 177                 this->running = 1;
 178                 this->joined = 0;
 179
 180                 if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 181                         this->width = mlt_properties_get_int( this->properties, "width" );
 182                 if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 183                         this->height = mlt_properties_get_int( this->properties, "height" );
 184
 185                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 186
 187                 if ( sdl_started == 0 && display_off == 0 )
 188                 {
 189                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 190                         {
 191                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 192                                 return -1;
 193                         }
 194
 195                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 196                         SDL_EnableUNICODE( 1 );
 197                 }
 198                 else if ( display_off == 0 )
 199                 {
 200                         this->sdl_screen = SDL_GetVideoSurface( );
 201                 }
 202
 203                 if ( audio_off == 0 )
 204                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 205
 206                 // Default window size
 207                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 208                 this->window_width = ( double )this->height * display_ratio;
 209                 this->window_height = this->height;
 210
 211                 if ( this->sdl_screen == NULL && display_off == 0 )
 212                 {
 213                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 214                         {
 215                                 const SDL_VideoInfo *vi = SDL_GetVideoInfo();
 216                                 this->window_width = vi->current_w;
 217                                 this->window_height = vi->current_h;
 218                                 this->sdl_flags |= SDL_FULLSCREEN;
 219                                 SDL_ShowCursor( SDL_DISABLE );
 220                         }
 221                         pthread_mutex_lock( &mlt_sdl_mutex );
 222                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 223                         pthread_mutex_unlock( &mlt_sdl_mutex );
 224                 }
 225
 226                 pthread_create( &this->thread, NULL, consumer_thread, this );
 227         }
 228
 229         return 0;
 230 }
 231
 232 int consumer_stop( mlt_consumer parent )
 233 {
 234         // Get the actual object
 235         consumer_sdl this = parent->child;
 236
 237         if ( this->joined == 0 )
 238         {
 239                 // Kill the thread and clean up
 240                 this->joined = 1;
 241                 this->running = 0;
 242                 if ( this->thread )
 243                         pthread_join( this->thread, NULL );
 244
 245                 // internal cleanup
 246                 if ( this->sdl_overlay != NULL )
 247                         SDL_FreeYUVOverlay( this->sdl_overlay );
 248                 this->sdl_overlay = NULL;
 249
 250                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 251                 {
 252                         pthread_mutex_lock( &this->audio_mutex );
 253                         pthread_cond_broadcast( &this->audio_cond );
 254                         pthread_mutex_unlock( &this->audio_mutex );
 255                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 256                 }
 257
 258                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 259                 {
 260                         pthread_mutex_lock( &mlt_sdl_mutex );
 261                         SDL_Quit( );
 262                         pthread_mutex_unlock( &mlt_sdl_mutex );
 263                 }
 264
 265                 this->sdl_screen = NULL;
 266         }
 267
 268         return 0;
 269 }
 270
 271 int consumer_is_stopped( mlt_consumer parent )
 272 {
 273         consumer_sdl this = parent->child;
 274         return !this->running;
 275 }
 276
 277 static int sdl_lock_display( )
 278 {
 279         pthread_mutex_lock( &mlt_sdl_mutex );
 280         SDL_Surface *screen = SDL_GetVideoSurface( );
 281         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 282         pthread_mutex_unlock( &mlt_sdl_mutex );
 283         return result;
 284 }
 285
 286 static void sdl_unlock_display( )
 287 {
 288         pthread_mutex_lock( &mlt_sdl_mutex );
 289         SDL_Surface *screen = SDL_GetVideoSurface( );
 290         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 291                 SDL_UnlockSurface( screen );
 292         pthread_mutex_unlock( &mlt_sdl_mutex );
 293 }
 294
 295 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 296 {
 297         consumer_sdl this = udata;
 298
 299         // Get the volume
 300         double volume = mlt_properties_get_double( this->properties, "volume" );
 301
 302         pthread_mutex_lock( &this->audio_mutex );
 303
 304         // Block until audio received
 305         while ( this->running && len > this->audio_avail )
 306                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 307
 308         if ( this->audio_avail >= len )
 309         {
 310                 // Place in the audio buffer
 311                 if ( volume != 1.0 )
 312                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 313                 else
 314                         memcpy( stream, this->audio_buffer, len );
 315
 316                 // Remove len from the audio available
 317                 this->audio_avail -= len;
 318
 319                 // Remove the samples
 320                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 321         }
 322         else
 323         {
 324                 // Just to be safe, wipe the stream first
 325                 memset( stream, 0, len );
 326
 327                 // Mix the audio
 328                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 329
 330                 // No audio left
 331                 this->audio_avail = 0;
 332         }
 333
 334         // We're definitely playing now
 335         this->playing = 1;
 336
 337         pthread_cond_broadcast( &this->audio_cond );
 338         pthread_mutex_unlock( &this->audio_mutex );
 339 }
 340
 341 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 342 {
 343         // Get the properties of this consumer
 344         mlt_properties properties = this->properties;
 345         mlt_audio_format afmt = mlt_audio_pcm;
 346
 347         // Set the preferred params of the test card signal
 348         int channels = mlt_properties_get_int( properties, "channels" );
 349         int frequency = mlt_properties_get_int( properties, "frequency" );
 350         static int counter = 0;
 351
 352         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 353
 354         int16_t *pcm;
 355         int bytes;
 356
 357         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 358         *duration = ( ( samples * 1000 ) / frequency );
 359
 360         if ( mlt_properties_get_int( properties, "audio_off" ) )
 361         {
 362                 this->playing = 1;
 363                 init_audio = 1;
 364                 return init_audio;
 365         }
 366
 367         if ( init_audio == 1 )
 368         {
 369                 SDL_AudioSpec request;
 370                 SDL_AudioSpec got;
 371
 372                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 373
 374                 // specify audio format
 375                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 376                 this->playing = 0;
 377                 request.freq = frequency;
 378                 request.format = AUDIO_S16SYS;
 379                 request.channels = channels;
 380                 request.samples = audio_buffer;
 381                 request.callback = sdl_fill_audio;
 382                 request.userdata = (void *)this;
 383                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 384                 {
 385                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 386                         init_audio = 2;
 387                 }
 388                 else if ( got.size != 0 )
 389                 {
 390                         SDL_PauseAudio( 0 );
 391                         init_audio = 0;
 392                 }
 393         }
 394
 395         if ( init_audio == 0 )
 396         {
 397                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 398                 bytes = ( samples * channels * 2 );
 399                 pthread_mutex_lock( &this->audio_mutex );
 400                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 401                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 402                 if ( this->running )
 403                 {
 404                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 405                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 406                         else
 407                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 408                         this->audio_avail += bytes;
 409                 }
 410                 pthread_cond_broadcast( &this->audio_cond );
 411                 pthread_mutex_unlock( &this->audio_mutex );
 412         }
 413         else
 414         {
 415                 this->playing = 1;
 416         }
 417
 418         return init_audio;
 419 }
 420
 421 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 422 {
 423         // Get the properties of this consumer
 424         mlt_properties properties = this->properties;
 425
 426         mlt_image_format vfmt = mlt_image_yuv422;
 427         int width = this->width, height = this->height;
 428         uint8_t *image;
 429         int changed = 0;
 430
 431         int video_off = mlt_properties_get_int( properties, "video_off" );
 432         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 433         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 434         int display_off = video_off | preview_off;
 435
 436         if ( this->running && display_off == 0 )
 437         {
 438                 // Get the image, width and height
 439                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 440                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 441                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 442
 443                 // Handle events
 444                 if ( this->sdl_screen != NULL )
 445                 {
 446                         SDL_Event event;
 447
 448                         sdl_lock_display( );
 449                         pthread_mutex_lock( &mlt_sdl_mutex );
 450                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 451                         pthread_mutex_unlock( &mlt_sdl_mutex );
 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                         pthread_mutex_lock( &mlt_sdl_mutex );
 502                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 503                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 504                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 505                         pthread_mutex_unlock( &mlt_sdl_mutex );
 506
 507                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 508                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 509                         SDL_Flip( this->sdl_screen );
 510                 }
 511
 512                 if ( this->running )
 513                 {
 514                         // Determine window's new display aspect ratio
 515                         double this_aspect = ( double )this->window_width / this->window_height;
 516
 517                         // Get the display aspect ratio
 518                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 519
 520                         // Determine frame's display aspect ratio
 521                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 522
 523                         // Store the width and height received
 524                         this->width = width;
 525                         this->height = height;
 526
 527                         // If using hardware scaler
 528                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 529                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 530                         {
 531                                 // Use hardware scaler to normalise display aspect ratio
 532                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 533                                 this->rect.h = this->window_height;
 534                                 if ( this->rect.w > this->window_width )
 535                                 {
 536                                         this->rect.w = this->window_width;
 537                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 538                                 }
 539                         }
 540                         // Special case optimisation to negate odd effect of sample aspect ratio
 541                         // not corresponding exactly with image resolution.
 542                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 543                         {
 544                                 this->rect.w = this->window_width;
 545                                 this->rect.h = this->window_height;
 546                         }
 547                         // Use hardware scaler to normalise sample aspect ratio
 548                         else if ( this->window_height * display_ratio > this->window_width )
 549                         {
 550                                 this->rect.w = this->window_width;
 551                                 this->rect.h = this->window_width / display_ratio;
 552                         }
 553                         else
 554                         {
 555                                 this->rect.w = this->window_height * display_ratio;
 556                                 this->rect.h = this->window_height;
 557                         }
 558
 559                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 560                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 561                         this->rect.x -= this->rect.x % 2;
 562
 563                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 564                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 565                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 566                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 567
 568                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 569                 }
 570
 571                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 572                 {
 573                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 574                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 575                 }
 576
 577                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 578                 {
 579                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 580                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 581                         {
 582                                 if ( image != NULL )
 583                                         memcpy( this->buffer, image, width * height * 2 );
 584                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 585                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 586                         }
 587                 }
 588
 589                 sdl_unlock_display();
 590         }
 591         else if ( this->running )
 592         {
 593                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 594                 if ( !video_off )
 595                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 596                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 597                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 598         }
 599
 600         return 0;
 601 }
 602
 603 static void *video_thread( void *arg )
 604 {
 605         // Identify the arg
 606         consumer_sdl this = arg;
 607
 608         // Obtain time of thread start
 609         struct timeval now;
 610         int64_t start = 0;
 611         int64_t elapsed = 0;
 612         struct timespec tm;
 613         mlt_frame next = NULL;
 614         mlt_properties properties = NULL;
 615         double speed = 0;
 616
 617         // Get real time flag
 618         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 619
 620         // Get the current time
 621         gettimeofday( &now, NULL );
 622
 623         // Determine start time
 624         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 625
 626         while ( this->running )
 627         {
 628                 // Pop the next frame
 629                 pthread_mutex_lock( &this->video_mutex );
 630                 next = mlt_deque_pop_front( this->queue );
 631                 while ( next == NULL && this->running )
 632                 {
 633                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 634                         next = mlt_deque_pop_front( this->queue );
 635                 }
 636                 pthread_mutex_unlock( &this->video_mutex );
 637
 638                 if ( !this->running || next == NULL ) break;
 639
 640                 // Get the properties
 641                 properties =  MLT_FRAME_PROPERTIES( next );
 642
 643                 // Get the speed of the frame
 644                 speed = mlt_properties_get_double( properties, "_speed" );
 645
 646                 // Get the current time
 647                 gettimeofday( &now, NULL );
 648
 649                 // Get the elapsed time
 650                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 651
 652                 // See if we have to delay the display of the current frame
 653                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 654                 {
 655                         // Obtain the scheduled playout time
 656                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 657
 658                         // Determine the difference between the elapsed time and the scheduled playout time
 659                         int64_t difference = scheduled - elapsed;
 660
 661                         // Smooth playback a bit
 662                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 663                         {
 664                                 tm.tv_sec = difference / 1000000;
 665                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 666                                 nanosleep( &tm, NULL );
 667                         }
 668
 669                         // Show current frame if not too old
 670                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 671                                 consumer_play_video( this, next );
 672
 673                         // If the queue is empty, recalculate start to allow build up again
 674                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 675                         {
 676                                 gettimeofday( &now, NULL );
 677                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 678                         }
 679                 }
 680
 681                 // This frame can now be closed
 682                 mlt_frame_close( next );
 683                 next = NULL;
 684         }
 685
 686         if ( next != NULL )
 687                 mlt_frame_close( next );
 688
 689         mlt_consumer_stopped( &this->parent );
 690
 691         return NULL;
 692 }
 693
 694 /** Threaded wrapper for pipe.
 695 */
 696
 697 static void *consumer_thread( void *arg )
 698 {
 699         // Identify the arg
 700         consumer_sdl this = arg;
 701
 702         // Get the consumer
 703         mlt_consumer consumer = &this->parent;
 704
 705         // Convenience functionality
 706         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 707         int terminated = 0;
 708
 709         // Video thread
 710         pthread_t thread;
 711
 712         // internal intialization
 713         int init_audio = 1;
 714         int init_video = 1;
 715         mlt_frame frame = NULL;
 716         mlt_properties properties = NULL;
 717         int duration = 0;
 718         int64_t playtime = 0;
 719         struct timespec tm = { 0, 100000 };
 720
 721         // Loop until told not to
 722         while( !terminated && this->running )
 723         {
 724                 // Get a frame from the attached producer
 725                 frame = mlt_consumer_rt_frame( consumer );
 726
 727                 // Check for termination
 728                 if ( terminate_on_pause && frame != NULL )
 729                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 730
 731                 // Ensure that we have a frame
 732                 if ( frame != NULL )
 733                 {
 734                         // Get the frame properties
 735                         properties =  MLT_FRAME_PROPERTIES( frame );
 736
 737                         // Play audio
 738                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 739
 740                         // Determine the start time now
 741                         if ( this->playing && init_video )
 742                         {
 743                                 // Create the video thread
 744                                 pthread_create( &thread, NULL, video_thread, this );
 745
 746                                 // Video doesn't need to be initialised any more
 747                                 init_video = 0;
 748                         }
 749
 750                         // Set playtime for this frame
 751                         mlt_properties_set_int( properties, "playtime", playtime );
 752
 753                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 754                                 nanosleep( &tm, NULL );
 755
 756                         // Push this frame to the back of the queue
 757                         pthread_mutex_lock( &this->video_mutex );
 758                         mlt_deque_push_back( this->queue, frame );
 759                         pthread_cond_broadcast( &this->video_cond );
 760                         pthread_mutex_unlock( &this->video_mutex );
 761
 762                         // Calculate the next playtime
 763                         playtime += ( duration * 1000 );
 764                 }
 765         }
 766
 767         this->running = 0;
 768
 769         // Kill the video thread
 770         if ( init_video == 0 )
 771         {
 772                 pthread_mutex_lock( &this->video_mutex );
 773                 pthread_cond_broadcast( &this->video_cond );
 774                 pthread_mutex_unlock( &this->video_mutex );
 775                 pthread_join( thread, NULL );
 776         }
 777
 778         while( mlt_deque_count( this->queue ) )
 779                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 780
 781         this->sdl_screen = NULL;
 782         this->audio_avail = 0;
 783
 784         return NULL;
 785 }
 786
 787 static int consumer_get_dimensions( int *width, int *height )
 788 {
 789         int changed = 0;
 790
 791         // SDL windows manager structure
 792         SDL_SysWMinfo wm;
 793
 794         // Specify the SDL Version
 795         SDL_VERSION( &wm.version );
 796
 797         // Lock the display
 798         //sdl_lock_display();
 799
 800 #ifndef __DARWIN__
 801         // Get the wm structure
 802         if ( SDL_GetWMInfo( &wm ) == 1 )
 803         {
 804                 // Check that we have the X11 wm
 805                 if ( wm.subsystem == SDL_SYSWM_X11 )
 806                 {
 807                         // Get the SDL window
 808                         Window window = wm.info.x11.window;
 809
 810                         // Get the display session
 811                         Display *display = wm.info.x11.display;
 812
 813                         // Get the window attributes
 814                         XWindowAttributes attr;
 815                         XGetWindowAttributes( display, window, &attr );
 816
 817                         // Determine whether window has changed
 818                         changed = *width != attr.width || *height != attr.height;
 819
 820                         // Return width and height
 821                         *width = attr.width;
 822                         *height = attr.height;
 823                 }
 824         }
 825 #endif
 826
 827         // Unlock the display
 828         //sdl_unlock_display();
 829
 830         return changed;
 831 }
 832
 833 /** Callback to allow override of the close method.
 834 */
 835
 836 static void consumer_close( mlt_consumer parent )
 837 {
 838         // Get the actual object
 839         consumer_sdl this = parent->child;
 840
 841         // Stop the consumer
 842         ///mlt_consumer_stop( parent );
 843
 844         // Now clean up the rest
 845         mlt_consumer_close( parent );
 846
 847         // Close the queue
 848         mlt_deque_close( this->queue );
 849
 850         // Destroy mutexes
 851         pthread_mutex_destroy( &this->audio_mutex );
 852         pthread_cond_destroy( &this->audio_cond );
 853
 854         // Finally clean up this
 855         free( this );
 856 }