research.m1stereo.tv/gitweb/ - melted/blob - src/modules/sdl/consumer_sdl.c

   1 /*
   2  * consumer_sdl.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt_consumer.h>
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <framework/mlt_factory.h>
  25 #include <framework/mlt_filter.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <pthread.h>
  30 #include <SDL/SDL.h>
  31 #include <SDL/SDL_syswm.h>
  32 #include <sys/time.h>
  33
  34 /** This classes definition.
  35 */
  36
  37 typedef struct consumer_sdl_s *consumer_sdl;
  38
  39 struct consumer_sdl_s
  40 {
  41         struct mlt_consumer_s parent;
  42         mlt_properties properties;
  43         mlt_deque queue;
  44         pthread_t thread;
  45         int joined;
  46         int running;
  47         uint8_t audio_buffer[ 4096 * 10 ];
  48         int audio_avail;
  49         pthread_mutex_t audio_mutex;
  50         pthread_cond_t audio_cond;
  51         pthread_mutex_t video_mutex;
  52         pthread_cond_t video_cond;
  53         int window_width;
  54         int window_height;
  55         int previous_width;
  56         int previous_height;
  57         int width;
  58         int height;
  59         int playing;
  60         int sdl_flags;
  61         SDL_Surface *sdl_screen;
  62         SDL_Overlay *sdl_overlay;
  63         SDL_Rect rect;
  64         uint8_t *buffer;
  65         int bpp;
  66         int filtered;
  67 };
  68
  69 /** Forward references to static functions.
  70 */
  71
  72 static int consumer_start( mlt_consumer parent );
  73 static int consumer_stop( mlt_consumer parent );
  74 static int consumer_is_stopped( mlt_consumer parent );
  75 static void consumer_close( mlt_consumer parent );
  76 static void *consumer_thread( void * );
  77 static int consumer_get_dimensions( int *width, int *height );
  78 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  79
  80 /** This is what will be called by the factory - anything can be passed in
  81         via the argument, but keep it simple.
  82 */
  83
  84 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  85 {
  86         // Create the consumer object
  87         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  88
  89         // If no malloc'd and consumer init ok
  90         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  91         {
  92                 // Create the queue
  93                 this->queue = mlt_deque_init( );
  94
  95                 // Get the parent consumer object
  96                 mlt_consumer parent = &this->parent;
  97
  98                 // We have stuff to clean up, so override the close method
  99                 parent->close = consumer_close;
 100
 101                 // get a handle on properties
 102                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 103                 this->properties = MLT_SERVICE_PROPERTIES( service );
 104
 105                 // Set the default volume
 106                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 107
 108                 // This is the initialisation of the consumer
 109                 pthread_mutex_init( &this->audio_mutex, NULL );
 110                 pthread_cond_init( &this->audio_cond, NULL);
 111                 pthread_mutex_init( &this->video_mutex, NULL );
 112                 pthread_cond_init( &this->video_cond, NULL);
 113
 114                 // Default scaler (for now we'll use nearest)
 115                 mlt_properties_set( this->properties, "rescale", "nearest" );
 116
 117                 // Default buffer for low latency
 118                 mlt_properties_set_int( this->properties, "buffer", 1 );
 119
 120                 // Default progressive true
 121                 mlt_properties_set_int( this->properties, "progressive", 0 );
 122
 123                 // Default audio buffer
 124                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 125
 126                 // Ensure we don't join on a non-running object
 127                 this->joined = 1;
 128
 129                 // process actual param
 130                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 131                 {
 132                         this->width = mlt_properties_get_int( this->properties, "width" );
 133                         this->height = mlt_properties_get_int( this->properties, "height" );
 134                 }
 135
 136                 // Set the sdl flags
 137                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 138
 139                 // Allow thread to be started/stopped
 140                 parent->start = consumer_start;
 141                 parent->stop = consumer_stop;
 142                 parent->is_stopped = consumer_is_stopped;
 143
 144                 // Register specific events
 145                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 146
 147                 // Return the consumer produced
 148                 return parent;
 149         }
 150
 151         // malloc or consumer init failed
 152         free( this );
 153
 154         // Indicate failure
 155         return NULL;
 156 }
 157
 158 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 159 {
 160         if ( listener != NULL )
 161                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 162 }
 163
 164 int consumer_start( mlt_consumer parent )
 165 {
 166         consumer_sdl this = parent->child;
 167
 168         if ( !this->running )
 169         {
 170                 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
 171                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 172                 int display_off = video_off | preview_off;
 173                 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
 174                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 175
 176                 consumer_stop( parent );
 177
 178                 this->running = 1;
 179                 this->joined = 0;
 180
 181                 if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 182                         this->width = mlt_properties_get_int( this->properties, "width" );
 183                 if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 184                         this->height = mlt_properties_get_int( this->properties, "height" );
 185
 186                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 187
 188                 // Attach a colour space converter
 189                 if ( preview_off && !this->filtered )
 190                 {
 191                         mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( parent ) );
 192                         mlt_filter filter = mlt_factory_filter( profile, "avcolour_space", NULL );
 193                         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                         this->filtered = 1;
 197                 }
 198
 199                 if ( sdl_started == 0 && display_off == 0 )
 200                 {
 201                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 202                         {
 203                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 204                                 return -1;
 205                         }
 206
 207                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 208                         SDL_EnableUNICODE( 1 );
 209                 }
 210                 else if ( display_off == 0 )
 211                 {
 212                         this->sdl_screen = SDL_GetVideoSurface( );
 213                 }
 214
 215                 if ( audio_off == 0 )
 216                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 217
 218                 // Default window size
 219                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 220                 this->window_width = ( double )this->height * display_ratio;
 221                 this->window_height = this->height;
 222
 223                 if ( this->sdl_screen == NULL && display_off == 0 )
 224                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 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                 pthread_join( this->thread, NULL );
 243
 244                 // internal cleanup
 245                 if ( this->sdl_overlay != NULL )
 246                         SDL_FreeYUVOverlay( this->sdl_overlay );
 247                 this->sdl_overlay = NULL;
 248
 249                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 250                 {
 251                         pthread_mutex_lock( &this->audio_mutex );
 252                         pthread_cond_broadcast( &this->audio_cond );
 253                         pthread_mutex_unlock( &this->audio_mutex );
 254                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 255                 }
 256
 257                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 258                         SDL_Quit( );
 259
 260                 this->sdl_screen = NULL;
 261         }
 262
 263         return 0;
 264 }
 265
 266 int consumer_is_stopped( mlt_consumer parent )
 267 {
 268         consumer_sdl this = parent->child;
 269         return !this->running;
 270 }
 271
 272 static int sdl_lock_display( )
 273 {
 274         SDL_Surface *screen = SDL_GetVideoSurface( );
 275         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 276 }
 277
 278 static void sdl_unlock_display( )
 279 {
 280         SDL_Surface *screen = SDL_GetVideoSurface( );
 281         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 282                 SDL_UnlockSurface( screen );
 283 }
 284
 285 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 286 {
 287         consumer_sdl this = udata;
 288
 289         // Get the volume
 290         double volume = mlt_properties_get_double( this->properties, "volume" );
 291
 292         pthread_mutex_lock( &this->audio_mutex );
 293
 294         // Block until audio received
 295         while ( this->running && len > this->audio_avail )
 296                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 297
 298         if ( this->audio_avail >= len )
 299         {
 300                 // Place in the audio buffer
 301                 if ( volume != 1.0 )
 302                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 303                 else
 304                         memcpy( stream, this->audio_buffer, len );
 305
 306                 // Remove len from the audio available
 307                 this->audio_avail -= len;
 308
 309                 // Remove the samples
 310                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 311         }
 312         else
 313         {
 314                 // Just to be safe, wipe the stream first
 315                 memset( stream, 0, len );
 316
 317                 // Mix the audio
 318                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 319
 320                 // No audio left
 321                 this->audio_avail = 0;
 322         }
 323
 324         // We're definitely playing now
 325         this->playing = 1;
 326
 327         pthread_cond_broadcast( &this->audio_cond );
 328         pthread_mutex_unlock( &this->audio_mutex );
 329 }
 330
 331 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 332 {
 333         // Get the properties of this consumer
 334         mlt_properties properties = this->properties;
 335         mlt_audio_format afmt = mlt_audio_pcm;
 336
 337         // Set the preferred params of the test card signal
 338         int channels = mlt_properties_get_int( properties, "channels" );
 339         int frequency = mlt_properties_get_int( properties, "frequency" );
 340         static int counter = 0;
 341
 342         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 343
 344         int16_t *pcm;
 345         int bytes;
 346
 347         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 348         *duration = ( ( samples * 1000 ) / frequency );
 349
 350         if ( mlt_properties_get_int( properties, "audio_off" ) )
 351         {
 352                 this->playing = 1;
 353                 init_audio = 1;
 354                 return init_audio;
 355         }
 356
 357         if ( init_audio == 1 )
 358         {
 359                 SDL_AudioSpec request;
 360                 SDL_AudioSpec got;
 361
 362                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 363
 364                 // specify audio format
 365                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 366                 this->playing = 0;
 367                 request.freq = frequency;
 368                 request.format = AUDIO_S16SYS;
 369                 request.channels = channels;
 370                 request.samples = audio_buffer;
 371                 request.callback = sdl_fill_audio;
 372                 request.userdata = (void *)this;
 373                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 374                 {
 375                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 376                         init_audio = 2;
 377                 }
 378                 else if ( got.size != 0 )
 379                 {
 380                         SDL_PauseAudio( 0 );
 381                         init_audio = 0;
 382                 }
 383         }
 384
 385         if ( init_audio == 0 )
 386         {
 387                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 388                 bytes = ( samples * channels * 2 );
 389                 pthread_mutex_lock( &this->audio_mutex );
 390                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 391                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 392                 if ( this->running )
 393                 {
 394                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 395                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 396                         else
 397                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 398                         this->audio_avail += bytes;
 399                 }
 400                 pthread_cond_broadcast( &this->audio_cond );
 401                 pthread_mutex_unlock( &this->audio_mutex );
 402         }
 403         else
 404         {
 405                 this->playing = 1;
 406         }
 407
 408         return init_audio;
 409 }
 410
 411 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 412 {
 413         // Get the properties of this consumer
 414         mlt_properties properties = this->properties;
 415
 416         mlt_image_format vfmt = mlt_image_yuv422;
 417         int width = this->width, height = this->height;
 418         uint8_t *image;
 419         int changed = 0;
 420
 421         int video_off = mlt_properties_get_int( properties, "video_off" );
 422         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 423         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 424         int display_off = video_off | preview_off;
 425
 426         if ( this->running && display_off == 0 )
 427         {
 428                 // Get the image, width and height
 429                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 430                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 431                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 432
 433                 // Handle events
 434                 if ( this->sdl_screen != NULL )
 435                 {
 436                         SDL_Event event;
 437
 438                         sdl_lock_display( );
 439                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 440                         sdl_unlock_display( );
 441
 442                         while ( SDL_PollEvent( &event ) )
 443                         {
 444                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 445
 446                                 switch( event.type )
 447                                 {
 448                                         case SDL_VIDEORESIZE:
 449                                                 this->window_width = event.resize.w;
 450                                                 this->window_height = event.resize.h;
 451                                                 changed = 1;
 452                                                 break;
 453                                         case SDL_QUIT:
 454                                                 this->running = 0;
 455                                                 break;
 456                                         case SDL_KEYDOWN:
 457                                                 {
 458                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 459                                                         char keyboard[ 2 ] = " ";
 460                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 461                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 462                                                         {
 463                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 464                                                                 callback( producer, keyboard );
 465                                                         }
 466                                                 }
 467                                                 break;
 468                                 }
 469                         }
 470                 }
 471
 472                 sdl_lock_display();
 473
 474                 if ( width != this->width || height != this->height )
 475                 {
 476                         if ( this->sdl_overlay != NULL )
 477                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 478                         this->sdl_overlay = NULL;
 479                 }
 480
 481                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 482                 {
 483                         // Force an overlay recreation
 484                         if ( this->sdl_overlay != NULL )
 485                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 486                         this->sdl_overlay = NULL;
 487
 488                         // open SDL window with video overlay, if possible
 489                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 490                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 491                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 492                 }
 493
 494                 if ( this->running )
 495                 {
 496                         // Determine window's new display aspect ratio
 497                         double this_aspect = ( double )this->window_width / this->window_height;
 498
 499                         // Get the display aspect ratio
 500                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 501
 502                         // Determine frame's display aspect ratio
 503                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 504
 505                         // Store the width and height received
 506                         this->width = width;
 507                         this->height = height;
 508
 509                         // If using hardware scaler
 510                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 511                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 512                         {
 513                                 // Use hardware scaler to normalise display aspect ratio
 514                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 515                                 this->rect.h = this->window_height;
 516                                 if ( this->rect.w > this->window_width )
 517                                 {
 518                                         this->rect.w = this->window_width;
 519                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 520                                 }
 521                         }
 522                         // Special case optimisation to negate odd effect of sample aspect ratio
 523                         // not corresponding exactly with image resolution.
 524                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 525                         {
 526                                 this->rect.w = this->window_width;
 527                                 this->rect.h = this->window_height;
 528                         }
 529                         // Use hardware scaler to normalise sample aspect ratio
 530                         else if ( this->window_height * display_ratio > this->window_width )
 531                         {
 532                                 this->rect.w = this->window_width;
 533                                 this->rect.h = this->window_width / display_ratio;
 534                         }
 535                         else
 536                         {
 537                                 this->rect.w = this->window_height * display_ratio;
 538                                 this->rect.h = this->window_height;
 539                         }
 540
 541                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 542                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 543                         this->rect.x -= this->rect.x % 2;
 544
 545                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 546                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 547                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 548                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 549
 550                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 551                 }
 552
 553                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 554                 {
 555                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 556                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 557                 }
 558
 559                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 560                 {
 561                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 562                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 563                         {
 564                                 if ( image != NULL )
 565                                         memcpy( this->buffer, image, width * height * 2 );
 566                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 567                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 568                         }
 569                 }
 570
 571                 sdl_unlock_display();
 572         }
 573         else if ( this->running )
 574         {
 575                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 576                 if ( !video_off )
 577                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 578                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 579                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 580         }
 581
 582         return 0;
 583 }
 584
 585 static void *video_thread( void *arg )
 586 {
 587         // Identify the arg
 588         consumer_sdl this = arg;
 589
 590         // Obtain time of thread start
 591         struct timeval now;
 592         int64_t start = 0;
 593         int64_t elapsed = 0;
 594         struct timespec tm;
 595         mlt_frame next = NULL;
 596         mlt_properties properties = NULL;
 597         double speed = 0;
 598
 599         // Get real time flag
 600         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 601
 602         // Get the current time
 603         gettimeofday( &now, NULL );
 604
 605         // Determine start time
 606         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 607
 608         while ( this->running )
 609         {
 610                 // Pop the next frame
 611                 pthread_mutex_lock( &this->video_mutex );
 612                 next = mlt_deque_pop_front( this->queue );
 613                 while ( next == NULL && this->running )
 614                 {
 615                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 616                         next = mlt_deque_pop_front( this->queue );
 617                 }
 618                 pthread_mutex_unlock( &this->video_mutex );
 619
 620                 if ( !this->running || next == NULL ) break;
 621
 622                 // Get the properties
 623                 properties =  MLT_FRAME_PROPERTIES( next );
 624
 625                 // Get the speed of the frame
 626                 speed = mlt_properties_get_double( properties, "_speed" );
 627
 628                 // Get the current time
 629                 gettimeofday( &now, NULL );
 630
 631                 // Get the elapsed time
 632                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 633
 634                 // See if we have to delay the display of the current frame
 635                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 636                 {
 637                         // Obtain the scheduled playout time
 638                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 639
 640                         // Determine the difference between the elapsed time and the scheduled playout time
 641                         int64_t difference = scheduled - elapsed;
 642
 643                         // Smooth playback a bit
 644                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 645                         {
 646                                 tm.tv_sec = difference / 1000000;
 647                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 648                                 nanosleep( &tm, NULL );
 649                         }
 650
 651                         // Show current frame if not too old
 652                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 653                                 consumer_play_video( this, next );
 654
 655                         // If the queue is empty, recalculate start to allow build up again
 656                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 657                         {
 658                                 gettimeofday( &now, NULL );
 659                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 660                         }
 661                 }
 662
 663                 // This frame can now be closed
 664                 mlt_frame_close( next );
 665                 next = NULL;
 666         }
 667
 668         if ( next != NULL )
 669                 mlt_frame_close( next );
 670
 671         mlt_consumer_stopped( &this->parent );
 672
 673         return NULL;
 674 }
 675
 676 /** Threaded wrapper for pipe.
 677 */
 678
 679 static void *consumer_thread( void *arg )
 680 {
 681         // Identify the arg
 682         consumer_sdl this = arg;
 683
 684         // Get the consumer
 685         mlt_consumer consumer = &this->parent;
 686
 687         // Convenience functionality
 688         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 689         int terminated = 0;
 690
 691         // Video thread
 692         pthread_t thread;
 693
 694         // internal intialization
 695         int init_audio = 1;
 696         int init_video = 1;
 697         mlt_frame frame = NULL;
 698         mlt_properties properties = NULL;
 699         int duration = 0;
 700         int64_t playtime = 0;
 701         struct timespec tm = { 0, 100000 };
 702
 703         // Loop until told not to
 704         while( !terminated && this->running )
 705         {
 706                 // Get a frame from the attached producer
 707                 frame = mlt_consumer_rt_frame( consumer );
 708
 709                 // Check for termination
 710                 if ( terminate_on_pause && frame != NULL )
 711                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 712
 713                 // Ensure that we have a frame
 714                 if ( frame != NULL )
 715                 {
 716                         // Get the frame properties
 717                         properties =  MLT_FRAME_PROPERTIES( frame );
 718
 719                         // Play audio
 720                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 721
 722                         // Determine the start time now
 723                         if ( this->playing && init_video )
 724                         {
 725                                 // Create the video thread
 726                                 pthread_create( &thread, NULL, video_thread, this );
 727
 728                                 // Video doesn't need to be initialised any more
 729                                 init_video = 0;
 730                         }
 731
 732                         // Set playtime for this frame
 733                         mlt_properties_set_int( properties, "playtime", playtime );
 734
 735                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 736                                 nanosleep( &tm, NULL );
 737
 738                         // Push this frame to the back of the queue
 739                         pthread_mutex_lock( &this->video_mutex );
 740                         mlt_deque_push_back( this->queue, frame );
 741                         pthread_cond_broadcast( &this->video_cond );
 742                         pthread_mutex_unlock( &this->video_mutex );
 743
 744                         // Calculate the next playtime
 745                         playtime += ( duration * 1000 );
 746                 }
 747         }
 748
 749         this->running = 0;
 750
 751         // Kill the video thread
 752         if ( init_video == 0 )
 753         {
 754                 pthread_mutex_lock( &this->video_mutex );
 755                 pthread_cond_broadcast( &this->video_cond );
 756                 pthread_mutex_unlock( &this->video_mutex );
 757                 pthread_join( thread, NULL );
 758         }
 759
 760         while( mlt_deque_count( this->queue ) )
 761                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 762
 763         this->sdl_screen = NULL;
 764         this->audio_avail = 0;
 765
 766         return NULL;
 767 }
 768
 769 static int consumer_get_dimensions( int *width, int *height )
 770 {
 771         int changed = 0;
 772
 773         // SDL windows manager structure
 774         SDL_SysWMinfo wm;
 775
 776         // Specify the SDL Version
 777         SDL_VERSION( &wm.version );
 778
 779         // Lock the display
 780         //sdl_lock_display();
 781
 782 #ifndef __DARWIN__
 783         // Get the wm structure
 784         if ( SDL_GetWMInfo( &wm ) == 1 )
 785         {
 786                 // Check that we have the X11 wm
 787                 if ( wm.subsystem == SDL_SYSWM_X11 )
 788                 {
 789                         // Get the SDL window
 790                         Window window = wm.info.x11.window;
 791
 792                         // Get the display session
 793                         Display *display = wm.info.x11.display;
 794
 795                         // Get the window attributes
 796                         XWindowAttributes attr;
 797                         XGetWindowAttributes( display, window, &attr );
 798
 799                         // Determine whether window has changed
 800                         changed = *width != attr.width || *height != attr.height;
 801
 802                         // Return width and height
 803                         *width = attr.width;
 804                         *height = attr.height;
 805                 }
 806         }
 807 #endif
 808
 809         // Unlock the display
 810         //sdl_unlock_display();
 811
 812         return changed;
 813 }
 814
 815 /** Callback to allow override of the close method.
 816 */
 817
 818 static void consumer_close( mlt_consumer parent )
 819 {
 820         // Get the actual object
 821         consumer_sdl this = parent->child;
 822
 823         // Stop the consumer
 824         ///mlt_consumer_stop( parent );
 825
 826         // Now clean up the rest
 827         mlt_consumer_close( parent );
 828
 829         // Close the queue
 830         mlt_deque_close( this->queue );
 831
 832         // Destroy mutexes
 833         pthread_mutex_destroy( &this->audio_mutex );
 834         pthread_cond_destroy( &this->audio_cond );
 835
 836         // Finally clean up this
 837         free( this );
 838 }