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 program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program 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
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "consumer_sdl.h"
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <pthread.h>
  28 #include <SDL/SDL.h>
  29 #include <SDL/SDL_syswm.h>
  30 #include <sys/time.h>
  31
  32 /** This classes definition.
  33 */
  34
  35 typedef struct consumer_sdl_s *consumer_sdl;
  36
  37 struct consumer_sdl_s
  38 {
  39         struct mlt_consumer_s parent;
  40         mlt_properties properties;
  41         mlt_deque queue;
  42         pthread_t thread;
  43         int joined;
  44         int running;
  45         uint8_t audio_buffer[ 4096 * 10 ];
  46         int audio_avail;
  47         pthread_mutex_t audio_mutex;
  48         pthread_cond_t audio_cond;
  49         pthread_mutex_t video_mutex;
  50         pthread_cond_t video_cond;
  51         int window_width;
  52         int window_height;
  53         int previous_width;
  54         int previous_height;
  55         int width;
  56         int height;
  57         int playing;
  58         int sdl_flags;
  59         SDL_Surface *sdl_screen;
  60         SDL_Overlay *sdl_overlay;
  61         SDL_Rect rect;
  62         uint8_t *buffer;
  63         int bpp;
  64 };
  65
  66 /** Forward references to static functions.
  67 */
  68
  69 static int consumer_start( mlt_consumer parent );
  70 static int consumer_stop( mlt_consumer parent );
  71 static int consumer_is_stopped( mlt_consumer parent );
  72 static void consumer_close( mlt_consumer parent );
  73 static void *consumer_thread( void * );
  74 static int consumer_get_dimensions( int *width, int *height );
  75 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  76
  77 /** This is what will be called by the factory - anything can be passed in
  78         via the argument, but keep it simple.
  79 */
  80
  81 mlt_consumer consumer_sdl_init( char *arg )
  82 {
  83         // Create the consumer object
  84         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  85
  86         // If no malloc'd and consumer init ok
  87         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  88         {
  89                 // Create the queue
  90                 this->queue = mlt_deque_init( );
  91
  92                 // Get the parent consumer object
  93                 mlt_consumer parent = &this->parent;
  94
  95                 // We have stuff to clean up, so override the close method
  96                 parent->close = consumer_close;
  97
  98                 // get a handle on properties
  99                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 100                 this->properties = MLT_SERVICE_PROPERTIES( service );
 101
 102                 // Default display aspect ratio
 103                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 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                 // Default window size
 137                 this->window_width = ( double )this->height * display_ratio;
 138                 this->window_height = this->height;
 139
 140                 // Set the sdl flags
 141                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 142
 143                 // Allow thread to be started/stopped
 144                 parent->start = consumer_start;
 145                 parent->stop = consumer_stop;
 146                 parent->is_stopped = consumer_is_stopped;
 147
 148                 // Register specific events
 149                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 150
 151                 // Return the consumer produced
 152                 return parent;
 153         }
 154
 155         // malloc or consumer init failed
 156         free( this );
 157
 158         // Indicate failure
 159         return NULL;
 160 }
 161
 162 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 163 {
 164         if ( listener != NULL )
 165                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 166 }
 167
 168 int consumer_start( mlt_consumer parent )
 169 {
 170         consumer_sdl this = parent->child;
 171
 172         if ( !this->running )
 173         {
 174                 consumer_stop( parent );
 175
 176                 this->running = 1;
 177                 this->joined = 0;
 178
 179                 this->width = mlt_properties_get_int( this->properties, "width" );
 180                 this->height = mlt_properties_get_int( this->properties, "height" );
 181
 182                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 183
 184                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 185                 {
 186                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 187                         {
 188                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 189                                 return -1;
 190                         }
 191
 192                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 193                         SDL_EnableUNICODE( 1 );
 194                 }
 195                 else
 196                 {
 197                         if ( SDL_GetVideoSurface( ) != NULL )
 198                                 this->sdl_screen = SDL_GetVideoSurface( );
 199                 }
 200
 201                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 202                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 203
 204                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 205
 206                 pthread_create( &this->thread, NULL, consumer_thread, this );
 207         }
 208
 209         return 0;
 210 }
 211
 212 int consumer_stop( mlt_consumer parent )
 213 {
 214         // Get the actual object
 215         consumer_sdl this = parent->child;
 216
 217         if ( this->joined == 0 )
 218         {
 219                 // Kill the thread and clean up
 220                 this->joined = 1;
 221                 this->running = 0;
 222                 pthread_join( this->thread, NULL );
 223
 224                 // internal cleanup
 225                 if ( this->sdl_overlay != NULL )
 226                         SDL_FreeYUVOverlay( this->sdl_overlay );
 227                 this->sdl_overlay = NULL;
 228
 229                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 230                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 231
 232                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 233                         SDL_Quit( );
 234
 235                 this->sdl_screen = NULL;
 236         }
 237
 238         return 0;
 239 }
 240
 241 int consumer_is_stopped( mlt_consumer parent )
 242 {
 243         consumer_sdl this = parent->child;
 244         return !this->running;
 245 }
 246
 247 static int sdl_lock_display( )
 248 {
 249         SDL_Surface *screen = SDL_GetVideoSurface( );
 250         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 251 }
 252
 253 static void sdl_unlock_display( )
 254 {
 255         SDL_Surface *screen = SDL_GetVideoSurface( );
 256         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 257                 SDL_UnlockSurface( screen );
 258 }
 259
 260 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 261 {
 262         consumer_sdl this = udata;
 263
 264         // Get the volume
 265         double volume = mlt_properties_get_double( this->properties, "volume" );
 266
 267         pthread_mutex_lock( &this->audio_mutex );
 268
 269         // Block until audio received
 270         while ( this->running && len > this->audio_avail )
 271                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 272
 273         if ( this->audio_avail >= len )
 274         {
 275                 // Place in the audio buffer
 276                 if ( volume != 1.0 )
 277                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 278                 else
 279                         memcpy( stream, this->audio_buffer, len );
 280
 281                 // Remove len from the audio available
 282                 this->audio_avail -= len;
 283
 284                 // Remove the samples
 285                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 286         }
 287         else
 288         {
 289                 // Just to be safe, wipe the stream first
 290                 memset( stream, 0, len );
 291
 292                 // Copy what we have into the stream
 293                 memcpy( stream, this->audio_buffer, this->audio_avail );
 294
 295                 // Mix the audio
 296                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 297
 298                 // No audio left
 299                 this->audio_avail = 0;
 300         }
 301
 302         // We're definitely playing now
 303         this->playing = 1;
 304
 305         pthread_cond_broadcast( &this->audio_cond );
 306         pthread_mutex_unlock( &this->audio_mutex );
 307 }
 308
 309 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 310 {
 311         // Get the properties of this consumer
 312         mlt_properties properties = this->properties;
 313         mlt_audio_format afmt = mlt_audio_pcm;
 314
 315         // Set the preferred params of the test card signal
 316         int channels = mlt_properties_get_int( properties, "channels" );
 317         int frequency = mlt_properties_get_int( properties, "frequency" );
 318         static int counter = 0;
 319
 320         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 321
 322         int16_t *pcm;
 323         int bytes;
 324
 325         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 326         *duration = ( ( samples * 1000 ) / frequency );
 327
 328         if ( mlt_properties_get_int( properties, "audio_off" ) )
 329         {
 330                 this->playing = 1;
 331                 init_audio = 1;
 332                 return init_audio;
 333         }
 334
 335         if ( init_audio == 1 )
 336         {
 337                 SDL_AudioSpec request;
 338                 SDL_AudioSpec got;
 339
 340                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 341
 342                 // specify audio format
 343                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 344                 this->playing = 0;
 345                 request.freq = frequency;
 346                 request.format = AUDIO_S16;
 347                 request.channels = channels;
 348                 request.samples = audio_buffer;
 349                 request.callback = sdl_fill_audio;
 350                 request.userdata = (void *)this;
 351                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 352                 {
 353                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 354                         init_audio = 2;
 355                 }
 356                 else if ( got.size != 0 )
 357                 {
 358                         SDL_PauseAudio( 0 );
 359                         init_audio = 0;
 360                 }
 361         }
 362
 363         if ( init_audio == 0 )
 364         {
 365                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 366                 bytes = ( samples * channels * 2 );
 367                 pthread_mutex_lock( &this->audio_mutex );
 368                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 369                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 370                 if ( this->running )
 371                 {
 372                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 373                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 374                         else
 375                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 376                         this->audio_avail += bytes;
 377                 }
 378                 pthread_cond_broadcast( &this->audio_cond );
 379                 pthread_mutex_unlock( &this->audio_mutex );
 380         }
 381         else
 382         {
 383                 this->playing = 1;
 384         }
 385
 386         return init_audio;
 387 }
 388
 389 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 390 {
 391         // Get the properties of this consumer
 392         mlt_properties properties = this->properties;
 393
 394         mlt_image_format vfmt = mlt_image_yuv422;
 395         int width = this->width, height = this->height;
 396         uint8_t *image;
 397         int changed = 0;
 398
 399         if ( this->running && mlt_properties_get_int( properties, "video_off" ) == 0 )
 400         {
 401                 // Get the image, width and height
 402                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 403                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 404
 405                 // Handle events
 406                 if ( this->sdl_screen != NULL )
 407                 {
 408                         SDL_Event event;
 409
 410                         sdl_lock_display( );
 411                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 412                         sdl_unlock_display( );
 413
 414                         while ( SDL_PollEvent( &event ) )
 415                         {
 416                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 417
 418                                 switch( event.type )
 419                                 {
 420                                         case SDL_VIDEORESIZE:
 421                                                 this->window_width = event.resize.w;
 422                                                 this->window_height = event.resize.h;
 423                                                 changed = 1;
 424                                                 break;
 425                                         case SDL_QUIT:
 426                                                 this->running = 0;
 427                                                 break;
 428                                         case SDL_KEYDOWN:
 429                                                 {
 430                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 431                                                         char keyboard[ 2 ] = " ";
 432                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 433                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 434                                                         {
 435                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 436                                                                 callback( producer, keyboard );
 437                                                         }
 438                                                 }
 439                                                 break;
 440                                 }
 441                         }
 442                 }
 443
 444                 sdl_lock_display();
 445
 446                 if ( width != this->width || height != this->height )
 447                 {
 448                         if ( this->sdl_overlay != NULL )
 449                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 450                         this->sdl_overlay = NULL;
 451                 }
 452
 453                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 454                 {
 455                         // Force an overlay recreation
 456                         if ( this->sdl_overlay != NULL )
 457                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 458                         this->sdl_overlay = NULL;
 459
 460                         // open SDL window with video overlay, if possible
 461                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 462                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 463                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 464                 }
 465
 466                 if ( this->running )
 467                 {
 468                         // Determine window's new display aspect ratio
 469                         double this_aspect = ( double )this->window_width / this->window_height;
 470
 471                         // Get the display aspect ratio
 472                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 473
 474                         // Determine frame's display aspect ratio
 475                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 476
 477                         // Store the width and height received
 478                         this->width = width;
 479                         this->height = height;
 480
 481                         // If using hardware scaler
 482                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 483                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 484                         {
 485                                 // Use hardware scaler to normalise display aspect ratio
 486                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 487                                 this->rect.h = this->window_height;
 488                                 if ( this->rect.w > this->window_width )
 489                                 {
 490                                         this->rect.w = this->window_width;
 491                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 492                                 }
 493                         }
 494                         // Special case optimisation to negate odd effect of sample aspect ratio
 495                         // not corresponding exactly with image resolution.
 496                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 497                         {
 498                                 this->rect.w = this->window_width;
 499                                 this->rect.h = this->window_height;
 500                         }
 501                         // Use hardware scaler to normalise sample aspect ratio
 502                         else if ( this->window_height * display_ratio > this->window_width )
 503                         {
 504                                 this->rect.w = this->window_width;
 505                                 this->rect.h = this->window_width / display_ratio;
 506                         }
 507                         else
 508                         {
 509                                 this->rect.w = this->window_height * display_ratio;
 510                                 this->rect.h = this->window_height;
 511                         }
 512
 513                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 514                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 515
 516                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 517                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 518                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 519                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 520
 521                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 522                 }
 523
 524                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 525                 {
 526                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 527                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 528                 }
 529
 530                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 531                 {
 532                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 533                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 534                         {
 535                                 if ( image != NULL )
 536                                         memcpy( this->buffer, image, width * height * 2 );
 537                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 538                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 539                         }
 540                 }
 541
 542                 sdl_unlock_display();
 543         }
 544
 545         return 0;
 546 }
 547
 548 static void *video_thread( void *arg )
 549 {
 550         // Identify the arg
 551         consumer_sdl this = arg;
 552
 553         // Obtain time of thread start
 554         struct timeval now;
 555         int64_t start = 0;
 556         int64_t elapsed = 0;
 557         struct timespec tm;
 558         mlt_frame next = NULL;
 559         mlt_properties properties = NULL;
 560         double speed = 0;
 561
 562         // Get real time flag
 563         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 564
 565         // Get the current time
 566         gettimeofday( &now, NULL );
 567
 568         // Determine start time
 569         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 570
 571         while ( this->running )
 572         {
 573                 // Pop the next frame
 574                 pthread_mutex_lock( &this->video_mutex );
 575                 next = mlt_deque_pop_front( this->queue );
 576                 while ( next == NULL && this->running )
 577                 {
 578                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 579                         next = mlt_deque_pop_front( this->queue );
 580                 }
 581                 pthread_mutex_unlock( &this->video_mutex );
 582
 583                 if ( !this->running || next == NULL ) break;
 584
 585                 // Get the properties
 586                 properties =  MLT_FRAME_PROPERTIES( next );
 587
 588                 // Get the speed of the frame
 589                 speed = mlt_properties_get_double( properties, "_speed" );
 590
 591                 // Get the current time
 592                 gettimeofday( &now, NULL );
 593
 594                 // Get the elapsed time
 595                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 596
 597                 // See if we have to delay the display of the current frame
 598                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 599                 {
 600                         // Obtain the scheduled playout time
 601                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 602
 603                         // Determine the difference between the elapsed time and the scheduled playout time
 604                         int64_t difference = scheduled - elapsed;
 605
 606                         // Smooth playback a bit
 607                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 608                         {
 609                                 tm.tv_sec = difference / 1000000;
 610                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 611                                 nanosleep( &tm, NULL );
 612                         }
 613
 614                         // Show current frame if not too old
 615                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 616                                 consumer_play_video( this, next );
 617
 618                         // If the queue is empty, recalculate start to allow build up again
 619                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 620                         {
 621                                 gettimeofday( &now, NULL );
 622                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 623                         }
 624                 }
 625
 626                 // This frame can now be closed
 627                 mlt_frame_close( next );
 628                 next = NULL;
 629         }
 630
 631         if ( next != NULL )
 632                 mlt_frame_close( next );
 633
 634         mlt_consumer_stopped( &this->parent );
 635
 636         return NULL;
 637 }
 638
 639 /** Threaded wrapper for pipe.
 640 */
 641
 642 static void *consumer_thread( void *arg )
 643 {
 644         // Identify the arg
 645         consumer_sdl this = arg;
 646
 647         // Get the consumer
 648         mlt_consumer consumer = &this->parent;
 649
 650         // Video thread
 651         pthread_t thread;
 652
 653         // internal intialization
 654         int init_audio = 1;
 655         int init_video = 1;
 656         mlt_frame frame = NULL;
 657         mlt_properties properties = NULL;
 658         int duration = 0;
 659         int64_t playtime = 0;
 660         struct timespec tm = { 0, 100000 };
 661
 662         // Loop until told not to
 663         while( this->running )
 664         {
 665                 // Get a frame from the attached producer
 666                 frame = mlt_consumer_rt_frame( consumer );
 667
 668                 // Ensure that we have a frame
 669                 if ( frame != NULL )
 670                 {
 671                         // Get the frame properties
 672                         properties =  MLT_FRAME_PROPERTIES( frame );
 673
 674                         // Play audio
 675                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 676
 677                         // Determine the start time now
 678                         if ( this->playing && init_video )
 679                         {
 680                                 // Create the video thread
 681                                 pthread_create( &thread, NULL, video_thread, this );
 682
 683                                 // Video doesn't need to be initialised any more
 684                                 init_video = 0;
 685                         }
 686
 687                         // Set playtime for this frame
 688                         mlt_properties_set_int( properties, "playtime", playtime );
 689
 690                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 691                                 nanosleep( &tm, NULL );
 692
 693                         // Push this frame to the back of the queue
 694                         pthread_mutex_lock( &this->video_mutex );
 695                         mlt_deque_push_back( this->queue, frame );
 696                         pthread_cond_broadcast( &this->video_cond );
 697                         pthread_mutex_unlock( &this->video_mutex );
 698
 699                         // Calculate the next playtime
 700                         playtime += ( duration * 1000 );
 701                 }
 702         }
 703
 704         // Kill the video thread
 705         if ( init_video == 0 )
 706         {
 707                 pthread_mutex_lock( &this->video_mutex );
 708                 pthread_cond_broadcast( &this->video_cond );
 709                 pthread_mutex_unlock( &this->video_mutex );
 710                 pthread_join( thread, NULL );
 711         }
 712
 713         while( mlt_deque_count( this->queue ) )
 714                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 715
 716         this->sdl_screen = NULL;
 717         this->audio_avail = 0;
 718
 719         return NULL;
 720 }
 721
 722 static int consumer_get_dimensions( int *width, int *height )
 723 {
 724         int changed = 0;
 725
 726         // SDL windows manager structure
 727         SDL_SysWMinfo wm;
 728
 729         // Specify the SDL Version
 730         SDL_VERSION( &wm.version );
 731
 732         // Lock the display
 733         //sdl_lock_display();
 734
 735 #ifndef __DARWIN__
 736         // Get the wm structure
 737         if ( SDL_GetWMInfo( &wm ) == 1 )
 738         {
 739                 // Check that we have the X11 wm
 740                 if ( wm.subsystem == SDL_SYSWM_X11 )
 741                 {
 742                         // Get the SDL window
 743                         Window window = wm.info.x11.window;
 744
 745                         // Get the display session
 746                         Display *display = wm.info.x11.display;
 747
 748                         // Get the window attributes
 749                         XWindowAttributes attr;
 750                         XGetWindowAttributes( display, window, &attr );
 751
 752                         // Determine whether window has changed
 753                         changed = *width != attr.width || *height != attr.height;
 754
 755                         // Return width and height
 756                         *width = attr.width;
 757                         *height = attr.height;
 758                 }
 759         }
 760 #endif
 761
 762         // Unlock the display
 763         //sdl_unlock_display();
 764
 765         return changed;
 766 }
 767
 768 /** Callback to allow override of the close method.
 769 */
 770
 771 static void consumer_close( mlt_consumer parent )
 772 {
 773         // Get the actual object
 774         consumer_sdl this = parent->child;
 775
 776         // Stop the consumer
 777         ///mlt_consumer_stop( parent );
 778
 779         // Now clean up the rest
 780         mlt_consumer_close( parent );
 781
 782         // Close the queue
 783         mlt_deque_close( this->queue );
 784
 785         // Destroy mutexes
 786         pthread_mutex_destroy( &this->audio_mutex );
 787         pthread_cond_destroy( &this->audio_cond );
 788
 789         // Finally clean up this
 790         free( this );
 791 }