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         float aspect_ratio;
  54         float display_aspect;
  55         double last_frame_aspect;
  56         int width;
  57         int height;
  58         int playing;
  59         int sdl_flags;
  60         SDL_Surface *sdl_screen;
  61         SDL_Overlay *sdl_overlay;
  62         SDL_Rect rect;
  63         uint8_t *buffer;
  64         int bpp;
  65 };
  66
  67 /** Forward references to static functions.
  68 */
  69
  70 static int consumer_start( mlt_consumer parent );
  71 static int consumer_stop( mlt_consumer parent );
  72 static int consumer_is_stopped( mlt_consumer parent );
  73 static void consumer_close( mlt_consumer parent );
  74 static void *consumer_thread( void * );
  75 static int consumer_get_dimensions( int *width, int *height );
  76 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  77
  78 /** This is what will be called by the factory - anything can be passed in
  79         via the argument, but keep it simple.
  80 */
  81
  82 mlt_consumer consumer_sdl_init( char *arg )
  83 {
  84         // Create the consumer object
  85         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  86
  87         // If no malloc'd and consumer init ok
  88         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  89         {
  90                 // Create the queue
  91                 this->queue = mlt_deque_init( );
  92
  93                 // Get the parent consumer object
  94                 mlt_consumer parent = &this->parent;
  95
  96                 // We have stuff to clean up, so override the close method
  97                 parent->close = consumer_close;
  98
  99                 // get a handle on properties
 100                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 101                 this->properties = MLT_SERVICE_PROPERTIES( service );
 102
 103                 // Set the default volume
 104                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 105
 106                 // This is the initialisation of the consumer
 107                 pthread_mutex_init( &this->audio_mutex, NULL );
 108                 pthread_cond_init( &this->audio_cond, NULL);
 109                 pthread_mutex_init( &this->video_mutex, NULL );
 110                 pthread_cond_init( &this->video_cond, NULL);
 111
 112                 // Default scaler (for now we'll use nearest)
 113                 mlt_properties_set( this->properties, "rescale", "nearest" );
 114
 115                 // Default buffer for low latency
 116                 mlt_properties_set_int( this->properties, "buffer", 1 );
 117
 118                 // Default progressive true
 119                 mlt_properties_set_int( this->properties, "progressive", 0 );
 120
 121                 // Default audio buffer
 122                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 123
 124                 // Get sample aspect ratio
 125                 this->aspect_ratio = mlt_properties_get_double( this->properties, "aspect_ratio" );
 126
 127                 // Ensure we don't join on a non-running object
 128                 this->joined = 1;
 129
 130                 // Default display aspect ratio
 131                 this->display_aspect = 4.0 / 3.0;
 132
 133                 // process actual param
 134                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 135                 {
 136                         this->width = mlt_properties_get_int( this->properties, "width" );
 137                         this->height = mlt_properties_get_int( this->properties, "height" );
 138                 }
 139
 140                 // Default window size
 141                 this->window_width = ( float )this->height * this->display_aspect;
 142                 this->window_height = this->height;
 143
 144                 // Set the sdl flags
 145                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 146
 147                 // Allow thread to be started/stopped
 148                 parent->start = consumer_start;
 149                 parent->stop = consumer_stop;
 150                 parent->is_stopped = consumer_is_stopped;
 151
 152                 // Register specific events
 153                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 154
 155                 // Return the consumer produced
 156                 return parent;
 157         }
 158
 159         // malloc or consumer init failed
 160         free( this );
 161
 162         // Indicate failure
 163         return NULL;
 164 }
 165
 166 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 167 {
 168         if ( listener != NULL )
 169                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 170 }
 171
 172 int consumer_start( mlt_consumer parent )
 173 {
 174         consumer_sdl this = parent->child;
 175
 176         if ( !this->running )
 177         {
 178                 pthread_attr_t thread_attributes;
 179
 180                 consumer_stop( parent );
 181
 182                 this->running = 1;
 183                 this->joined = 0;
 184
 185                 // Allow the user to force resizing to window size
 186                 if ( mlt_properties_get_int( this->properties, "resize" ) )
 187                 {
 188                         mlt_properties_set_int( this->properties, "width", this->width );
 189                         mlt_properties_set_int( this->properties, "height", this->height );
 190                 }
 191
 192                 // Inherit the scheduling priority
 193                 pthread_attr_init( &thread_attributes );
 194                 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
 195
 196                 pthread_create( &this->thread, &thread_attributes, consumer_thread, this );
 197         }
 198
 199         return 0;
 200 }
 201
 202 int consumer_stop( mlt_consumer parent )
 203 {
 204         // Get the actual object
 205         consumer_sdl this = parent->child;
 206
 207         if ( this->joined == 0 )
 208         {
 209                 // Kill the thread and clean up
 210                 this->joined = 1;
 211                 this->running = 0;
 212                 pthread_join( this->thread, NULL );
 213         }
 214
 215         return 0;
 216 }
 217
 218 int consumer_is_stopped( mlt_consumer parent )
 219 {
 220         consumer_sdl this = parent->child;
 221         return !this->running;
 222 }
 223
 224 static int sdl_lock_display( )
 225 {
 226         SDL_Surface *screen = SDL_GetVideoSurface( );
 227         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 228 }
 229
 230 static void sdl_unlock_display( )
 231 {
 232         SDL_Surface *screen = SDL_GetVideoSurface( );
 233         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 234                 SDL_UnlockSurface( screen );
 235 }
 236
 237 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 238 {
 239         consumer_sdl this = udata;
 240
 241         // Get the volume
 242         float volume = mlt_properties_get_double( this->properties, "volume" );
 243
 244         pthread_mutex_lock( &this->audio_mutex );
 245
 246         // Block until audio received
 247         while ( this->running && len > this->audio_avail )
 248                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 249
 250         if ( this->audio_avail >= len )
 251         {
 252                 // Place in the audio buffer
 253                 memcpy( stream, this->audio_buffer, len );
 254
 255                 // Remove len from the audio available
 256                 this->audio_avail -= len;
 257
 258                 // Remove the samples
 259                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 260         }
 261         else
 262         {
 263                 // Just to be safe, wipe the stream first
 264                 memset( stream, 0, len );
 265
 266                 // Copy what we have into the stream
 267                 memcpy( stream, this->audio_buffer, this->audio_avail );
 268
 269                 // Mix the audio
 270                 SDL_MixAudio( stream, stream, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 271
 272                 // No audio left
 273                 this->audio_avail = 0;
 274         }
 275
 276         // We're definitely playing now
 277         this->playing = 1;
 278
 279         pthread_cond_broadcast( &this->audio_cond );
 280         pthread_mutex_unlock( &this->audio_mutex );
 281 }
 282
 283 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 284 {
 285         // Get the properties of this consumer
 286         mlt_properties properties = this->properties;
 287         mlt_audio_format afmt = mlt_audio_pcm;
 288
 289         // Set the preferred params of the test card signal
 290         int channels = mlt_properties_get_int( properties, "channels" );
 291         int frequency = mlt_properties_get_int( properties, "frequency" );
 292         static int counter = 0;
 293
 294         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 295
 296         int16_t *pcm;
 297         int bytes;
 298
 299         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 300         *duration = ( ( samples * 1000 ) / frequency );
 301
 302         if ( mlt_properties_get_int( properties, "audio_off" ) )
 303         {
 304                 this->playing = 1;
 305                 init_audio = 1;
 306                 return init_audio;
 307         }
 308
 309         if ( init_audio == 1 )
 310         {
 311                 SDL_AudioSpec request;
 312                 SDL_AudioSpec got;
 313
 314                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 315
 316                 // specify audio format
 317                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 318                 this->playing = 0;
 319                 request.freq = frequency;
 320                 request.format = AUDIO_S16;
 321                 request.channels = channels;
 322                 request.samples = audio_buffer;
 323                 request.callback = sdl_fill_audio;
 324                 request.userdata = (void *)this;
 325                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 326                 {
 327                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 328                         init_audio = 2;
 329                 }
 330                 else if ( got.size != 0 )
 331                 {
 332                         SDL_PauseAudio( 0 );
 333                         init_audio = 0;
 334                 }
 335         }
 336
 337         if ( init_audio == 0 )
 338         {
 339                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 340                 bytes = ( samples * channels * 2 );
 341                 pthread_mutex_lock( &this->audio_mutex );
 342                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 343                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 344                 if ( this->running )
 345                 {
 346                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 347                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 348                         else
 349                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 350                         this->audio_avail += bytes;
 351                 }
 352                 pthread_cond_broadcast( &this->audio_cond );
 353                 pthread_mutex_unlock( &this->audio_mutex );
 354         }
 355         else
 356         {
 357                 this->playing = 1;
 358         }
 359
 360         return init_audio;
 361 }
 362
 363 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 364 {
 365         // Get the properties of this consumer
 366         mlt_properties properties = this->properties;
 367
 368         mlt_image_format vfmt = mlt_image_yuv422;
 369         int width = this->width, height = this->height;
 370         uint8_t *image;
 371         int changed = 0;
 372
 373         if ( this->running && mlt_properties_get_int( properties, "video_off" ) == 0 )
 374         {
 375                 // Get the image, width and height
 376                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 377                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 378
 379                 // Handle events
 380                 if ( this->sdl_screen != NULL )
 381                 {
 382                         SDL_Event event;
 383
 384                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 385
 386                         while ( SDL_PollEvent( &event ) )
 387                         {
 388                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 389
 390                                 switch( event.type )
 391                                 {
 392                                         case SDL_VIDEORESIZE:
 393                                                 this->window_width = event.resize.w;
 394                                                 this->window_height = event.resize.h;
 395                                                 changed = 1;
 396                                                 break;
 397                                         case SDL_QUIT:
 398                                                 this->running = 0;
 399                                                 break;
 400                                         case SDL_KEYDOWN:
 401                                                 {
 402                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 403                                                         char keyboard[ 2 ] = " ";
 404                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 405                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 406                                                         {
 407                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 408                                                                 callback( producer, keyboard );
 409                                                         }
 410                                                 }
 411                                                 break;
 412                                 }
 413                         }
 414                 }
 415
 416                 if ( width != this->width || height != this->height )
 417                 {
 418                         if ( this->sdl_overlay != NULL )
 419                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 420                         this->sdl_overlay = NULL;
 421                 }
 422
 423                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 424                 {
 425                         // Force an overlay recreation
 426                         if ( this->sdl_overlay != NULL )
 427                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 428                         this->sdl_overlay = NULL;
 429
 430                         // open SDL window with video overlay, if possible
 431                         sdl_lock_display();
 432                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 433                         sdl_unlock_display();
 434                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 435                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 436                         //SDL_Flip( this->sdl_screen );
 437                         mlt_properties_set_int( properties, "changed", 0 );
 438                 }
 439                 else if ( mlt_properties_get_int( properties, "changed" ) )
 440                 {
 441                         sdl_lock_display();
 442                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 443                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 444                         sdl_unlock_display();
 445                         mlt_properties_set_int( properties, "changed", 0 );
 446                 }
 447
 448                 if ( this->running )
 449                 {
 450                         // Determine window's new display aspect ratio
 451                         float this_aspect = ( float )this->window_width / this->window_height;
 452
 453                         // Determine frame's display aspect ratio
 454                         float frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 455                         this->width = width;
 456                         this->height = height;
 457
 458                         // If using hardware scaler
 459                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 460                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 461                         {
 462                                 // Special case optimisation to negate odd effect of sample aspect ratio
 463                                 // not corresponding exactly with image resolution.
 464                                 if ( ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) ) &&
 465                                          ( (int)( mlt_frame_get_aspect_ratio( frame ) * 1000 ) == (int)( this->aspect_ratio * 1000 ) ) )
 466                                 {
 467                                         this->rect.w = this->window_width;
 468                                         this->rect.h = this->window_height;
 469                                 }
 470                                 else
 471                                 {
 472                                         // Use hardware scaler to normalise display aspect ratio
 473                                         this->rect.w = frame_aspect / this_aspect * this->window_width;
 474                                         this->rect.h = this->window_height;
 475                                         if ( this->rect.w > this->window_width )
 476                                         {
 477                                                 this->rect.w = this->window_width;
 478                                                 this->rect.h = this_aspect / frame_aspect * this->window_height;
 479                                         }
 480                                 }
 481                         }
 482                         // Special case optimisation to negate odd effect of sample aspect ratio
 483                         // not corresponding exactly with image resolution.
 484                         else if ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) )
 485                         {
 486                                 this->rect.w = this->window_width;
 487                                 this->rect.h = this->window_height;
 488                         }
 489                         // Use hardware scaler to normalise sample aspect ratio
 490                         else if ( this->window_height * this->display_aspect > this->window_width )
 491                         {
 492                                 this->rect.w = this->window_width;
 493                                 this->rect.h = this->window_width / this->display_aspect;
 494                         }
 495                         else
 496                         {
 497                                 this->rect.w = this->window_height * this->display_aspect;
 498                                 this->rect.h = this->window_height;
 499                         }
 500
 501                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 502                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 503
 504                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 505                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 506                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 507                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 508
 509                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 510                 }
 511
 512                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 513                 {
 514                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 515                         SDL_Flip( this->sdl_screen );
 516                         sdl_lock_display();
 517                         this->sdl_overlay = SDL_CreateYUVOverlay( this->width, this->height, SDL_YUY2_OVERLAY, this->sdl_screen );
 518                         sdl_unlock_display();
 519                 }
 520
 521                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 522                 {
 523                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 524                         sdl_lock_display();
 525                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 526                         {
 527                                 if ( image != NULL )
 528                                         memcpy( this->buffer, image, width * height * 2 );
 529                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 530                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 531                         }
 532                         sdl_unlock_display();
 533                 }
 534         }
 535
 536         return 0;
 537 }
 538
 539 static void *video_thread( void *arg )
 540 {
 541         // Identify the arg
 542         consumer_sdl this = arg;
 543
 544         // Obtain time of thread start
 545         struct timeval now;
 546         int64_t start = 0;
 547         int64_t elapsed = 0;
 548         struct timespec tm;
 549         mlt_frame next = NULL;
 550         mlt_properties properties = NULL;
 551         double speed = 0;
 552
 553         // Get real time flag
 554         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 555
 556         // Get the current time
 557         gettimeofday( &now, NULL );
 558
 559         // Determine start time
 560         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 561
 562         while ( this->running )
 563         {
 564                 // Pop the next frame
 565                 pthread_mutex_lock( &this->video_mutex );
 566                 next = mlt_deque_pop_front( this->queue );
 567                 while ( next == NULL && this->running )
 568                 {
 569                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 570                         next = mlt_deque_pop_front( this->queue );
 571                 }
 572                 pthread_mutex_unlock( &this->video_mutex );
 573
 574                 if ( !this->running || next == NULL ) break;
 575
 576                 // Get the properties
 577                 properties =  MLT_FRAME_PROPERTIES( next );
 578
 579                 // Get the speed of the frame
 580                 speed = mlt_properties_get_double( properties, "_speed" );
 581
 582                 // Get the current time
 583                 gettimeofday( &now, NULL );
 584
 585                 // Get the elapsed time
 586                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 587
 588                 // See if we have to delay the display of the current frame
 589                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 590                 {
 591                         // Obtain the scheduled playout time
 592                         mlt_position scheduled = mlt_properties_get_position( properties, "playtime" );
 593
 594                         // Determine the difference between the elapsed time and the scheduled playout time
 595                         mlt_position difference = scheduled - elapsed;
 596
 597                         // Smooth playback a bit
 598                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 599                         {
 600                                 tm.tv_sec = difference / 1000000;
 601                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 602                                 nanosleep( &tm, NULL );
 603                         }
 604
 605                         // Show current frame if not too old
 606                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 607                                 consumer_play_video( this, next );
 608
 609                         // If the queue is empty, recalculate start to allow build up again
 610                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 611                         {
 612                                 gettimeofday( &now, NULL );
 613                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 614                         }
 615                 }
 616
 617                 // This frame can now be closed
 618                 mlt_frame_close( next );
 619                 next = NULL;
 620         }
 621
 622         if ( next != NULL )
 623                 mlt_frame_close( next );
 624
 625         mlt_consumer_stopped( &this->parent );
 626
 627         return NULL;
 628 }
 629
 630 /** Threaded wrapper for pipe.
 631 */
 632
 633 static void *consumer_thread( void *arg )
 634 {
 635         // Identify the arg
 636         consumer_sdl this = arg;
 637
 638         // Get the consumer
 639         mlt_consumer consumer = &this->parent;
 640
 641         // Video thread
 642         pthread_t thread;
 643
 644         // internal intialization
 645         int init_audio = 1;
 646         int init_video = 1;
 647         mlt_frame frame = NULL;
 648         mlt_properties properties = NULL;
 649         int duration = 0;
 650         int64_t playtime = 0;
 651         struct timespec tm = { 0, 100000 };
 652
 653         this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 654
 655         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "sdl_started" ) == 0 )
 656         {
 657                 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 658                 {
 659                         fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 660                         return NULL;
 661                 }
 662
 663                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 664                 SDL_EnableUNICODE( 1 );
 665         }
 666         else
 667         {
 668                 if ( SDL_GetVideoSurface( ) != NULL )
 669                 {
 670                         this->sdl_screen = SDL_GetVideoSurface( );
 671                         consumer_get_dimensions( &this->window_width, &this->window_height );
 672                         mlt_properties_set_int( this->properties, "changed", 0 );
 673                 }
 674         }
 675
 676         if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "audio_off" ) )
 677                 SDL_InitSubSystem( SDL_INIT_AUDIO );
 678
 679         // Loop until told not to
 680         while( this->running )
 681         {
 682                 // Get a frame from the attached producer
 683                 frame = mlt_consumer_rt_frame( consumer );
 684
 685                 // Ensure that we have a frame
 686                 if ( frame != NULL )
 687                 {
 688                         // Get the frame properties
 689                         properties =  MLT_FRAME_PROPERTIES( frame );
 690
 691                         // Play audio
 692                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 693
 694                         // Determine the start time now
 695                         if ( this->playing && init_video )
 696                         {
 697                                 // Create the video thread
 698                                 pthread_create( &thread, NULL, video_thread, this );
 699
 700                                 // Video doesn't need to be initialised any more
 701                                 init_video = 0;
 702                         }
 703
 704                         // Set playtime for this frame
 705                         mlt_properties_set_position( properties, "playtime", playtime );
 706
 707                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 708                                 nanosleep( &tm, NULL );
 709
 710                         // Push this frame to the back of the queue
 711                         pthread_mutex_lock( &this->video_mutex );
 712                         mlt_deque_push_back( this->queue, frame );
 713                         pthread_cond_broadcast( &this->video_cond );
 714                         pthread_mutex_unlock( &this->video_mutex );
 715
 716                         // Calculate the next playtime
 717                         playtime += ( duration * 1000 );
 718                 }
 719         }
 720
 721         // Kill the video thread
 722         if ( init_video == 0 )
 723         {
 724                 pthread_mutex_lock( &this->video_mutex );
 725                 pthread_cond_broadcast( &this->video_cond );
 726                 pthread_mutex_unlock( &this->video_mutex );
 727                 pthread_join( thread, NULL );
 728         }
 729
 730         // internal cleanup
 731         if ( this->sdl_overlay != NULL )
 732                 SDL_FreeYUVOverlay( this->sdl_overlay );
 733
 734         if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "audio_off" ) )
 735                 SDL_QuitSubSystem( SDL_INIT_AUDIO );
 736
 737         //if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "sdl_started" ) == 0 )
 738                 //SDL_Quit( );
 739
 740         while( mlt_deque_count( this->queue ) )
 741                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 742
 743         this->sdl_screen = NULL;
 744         this->sdl_overlay = NULL;
 745         this->audio_avail = 0;
 746
 747         return NULL;
 748 }
 749
 750 static int consumer_get_dimensions( int *width, int *height )
 751 {
 752         int changed = 0;
 753
 754         // SDL windows manager structure
 755         SDL_SysWMinfo wm;
 756
 757         // Specify the SDL Version
 758         SDL_VERSION( &wm.version );
 759
 760         // Lock the display
 761         sdl_lock_display();
 762
 763         // Get the wm structure
 764         if ( SDL_GetWMInfo( &wm ) == 1 )
 765         {
 766                 // Check that we have the X11 wm
 767                 if ( wm.subsystem == SDL_SYSWM_X11 )
 768                 {
 769                         // Get the SDL window
 770                         Window window = wm.info.x11.window;
 771
 772                         // Get the display session
 773                         Display *display = wm.info.x11.display;
 774
 775                         // Get the window attributes
 776                         XWindowAttributes attr;
 777                         XGetWindowAttributes( display, window, &attr );
 778
 779                         // Determine whether window has changed
 780                         changed = *width != attr.width || *height != attr.height;
 781
 782                         // Return width and height
 783                         *width = attr.width;
 784                         *height = attr.height;
 785                 }
 786         }
 787
 788         // Unlock the display
 789         sdl_lock_display();
 790
 791         return changed;
 792 }
 793
 794 /** Callback to allow override of the close method.
 795 */
 796
 797 static void consumer_close( mlt_consumer parent )
 798 {
 799         // Get the actual object
 800         consumer_sdl this = parent->child;
 801
 802         // Stop the consumer
 803         ///mlt_consumer_stop( parent );
 804
 805         // Now clean up the rest
 806         mlt_consumer_close( parent );
 807
 808         // Close the queue
 809         mlt_deque_close( this->queue );
 810
 811         // Destroy mutexes
 812         pthread_mutex_destroy( &this->audio_mutex );
 813         pthread_cond_destroy( &this->audio_cond );
 814
 815         // Finally clean up this
 816         free( this );
 817 }