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 #ifdef __DARWIN__
  33 #       include "consumer_sdl_osx_hack.h"
  34 #       import <AppKit/NSApplication.h>
  35 #       import <Foundation/Foundation.h>
  36 #endif
  37
  38
  39 /** This classes definition.
  40 */
  41
  42 typedef struct consumer_sdl_s *consumer_sdl;
  43
  44 struct consumer_sdl_s
  45 {
  46         struct mlt_consumer_s parent;
  47         mlt_properties properties;
  48         mlt_deque queue;
  49         pthread_t thread;
  50         int joined;
  51         int running;
  52         uint8_t audio_buffer[ 4096 * 10 ];
  53         int audio_avail;
  54         pthread_mutex_t audio_mutex;
  55         pthread_cond_t audio_cond;
  56         pthread_mutex_t video_mutex;
  57         pthread_cond_t video_cond;
  58         int window_width;
  59         int window_height;
  60         int previous_width;
  61         int previous_height;
  62         int width;
  63         int height;
  64         int playing;
  65         int sdl_flags;
  66         SDL_Surface *sdl_screen;
  67         SDL_Overlay *sdl_overlay;
  68         SDL_Rect rect;
  69         uint8_t *buffer;
  70         int bpp;
  71 };
  72
  73 /** Forward references to static functions.
  74 */
  75
  76 static int consumer_start( mlt_consumer parent );
  77 static int consumer_stop( mlt_consumer parent );
  78 static int consumer_is_stopped( mlt_consumer parent );
  79 static void consumer_close( mlt_consumer parent );
  80 static void *consumer_thread( void * );
  81 static int consumer_get_dimensions( int *width, int *height );
  82 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  83
  84 /** This is what will be called by the factory - anything can be passed in
  85         via the argument, but keep it simple.
  86 */
  87
  88 mlt_consumer consumer_sdl_init( char *arg )
  89 {
  90 #ifdef __DARWIN__
  91         // Initialize Cocoa
  92         NSApplicationLoad();
  93         [NSApplication sharedApplication];
  94
  95         // Spawn a fake thread so that cocoa knows to be multithreaded
  96         DummyThread *dummy = [[DummyThread alloc] init];
  97         [NSThread detachNewThreadSelector:@selector(startThread:) toTarget:dummy withObject:nil];
  98 #endif
  99
 100         // Create the consumer object
 101         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
 102
 103         // If no malloc'd and consumer init ok
 104         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
 105         {
 106                 // Create the queue
 107                 this->queue = mlt_deque_init( );
 108
 109                 // Get the parent consumer object
 110                 mlt_consumer parent = &this->parent;
 111
 112                 // We have stuff to clean up, so override the close method
 113                 parent->close = consumer_close;
 114
 115                 // get a handle on properties
 116                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 117                 this->properties = MLT_SERVICE_PROPERTIES( service );
 118
 119                 // Default display aspect ratio
 120                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 121
 122                 // Set the default volume
 123                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 124
 125                 // This is the initialisation of the consumer
 126                 pthread_mutex_init( &this->audio_mutex, NULL );
 127                 pthread_cond_init( &this->audio_cond, NULL);
 128                 pthread_mutex_init( &this->video_mutex, NULL );
 129                 pthread_cond_init( &this->video_cond, NULL);
 130
 131                 // Default scaler (for now we'll use nearest)
 132                 mlt_properties_set( this->properties, "rescale", "nearest" );
 133
 134                 // Default buffer for low latency
 135                 mlt_properties_set_int( this->properties, "buffer", 1 );
 136
 137                 // Default progressive true
 138                 mlt_properties_set_int( this->properties, "progressive", 0 );
 139
 140                 // Default audio buffer
 141                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 142
 143                 // Ensure we don't join on a non-running object
 144                 this->joined = 1;
 145
 146                 // process actual param
 147                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 148                 {
 149                         this->width = mlt_properties_get_int( this->properties, "width" );
 150                         this->height = mlt_properties_get_int( this->properties, "height" );
 151                 }
 152
 153                 // Default window size
 154                 this->window_width = ( double )this->height * display_ratio;
 155                 this->window_height = this->height;
 156
 157                 // Set the sdl flags
 158                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 159
 160                 // Allow thread to be started/stopped
 161                 parent->start = consumer_start;
 162                 parent->stop = consumer_stop;
 163                 parent->is_stopped = consumer_is_stopped;
 164
 165                 // Register specific events
 166                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 167
 168                 // Return the consumer produced
 169                 return parent;
 170         }
 171
 172         // malloc or consumer init failed
 173         free( this );
 174
 175         // Indicate failure
 176         return NULL;
 177 }
 178
 179 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 180 {
 181         if ( listener != NULL )
 182                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 183 }
 184
 185 int consumer_start( mlt_consumer parent )
 186 {
 187         consumer_sdl this = parent->child;
 188
 189         if ( !this->running )
 190         {
 191                 consumer_stop( parent );
 192
 193                 this->running = 1;
 194                 this->joined = 0;
 195
 196                 // Allow the user to force resizing to window size
 197                 if ( mlt_properties_get_int( this->properties, "resize" ) )
 198                 {
 199                         mlt_properties_set_int( this->properties, "width", this->width );
 200                         mlt_properties_set_int( this->properties, "height", this->height );
 201                 }
 202                 else
 203                 {
 204                         this->width = mlt_properties_get_int( this->properties, "width" );
 205                         this->height = mlt_properties_get_int( this->properties, "height" );
 206                 }
 207
 208                 pthread_create( &this->thread, NULL, consumer_thread, this );
 209         }
 210
 211         return 0;
 212 }
 213
 214 int consumer_stop( mlt_consumer parent )
 215 {
 216         // Get the actual object
 217         consumer_sdl this = parent->child;
 218
 219         if ( this->joined == 0 )
 220         {
 221                 // Kill the thread and clean up
 222                 this->joined = 1;
 223                 this->running = 0;
 224                 pthread_join( this->thread, NULL );
 225         }
 226
 227         return 0;
 228 }
 229
 230 int consumer_is_stopped( mlt_consumer parent )
 231 {
 232         consumer_sdl this = parent->child;
 233         return !this->running;
 234 }
 235
 236 static int sdl_lock_display( )
 237 {
 238         SDL_Surface *screen = SDL_GetVideoSurface( );
 239         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 240 }
 241
 242 static void sdl_unlock_display( )
 243 {
 244         SDL_Surface *screen = SDL_GetVideoSurface( );
 245         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 246                 SDL_UnlockSurface( screen );
 247 }
 248
 249 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 250 {
 251         consumer_sdl this = udata;
 252
 253         // Get the volume
 254         double volume = mlt_properties_get_double( this->properties, "volume" );
 255
 256         pthread_mutex_lock( &this->audio_mutex );
 257
 258         // Block until audio received
 259         while ( this->running && len > this->audio_avail )
 260                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 261
 262         if ( this->audio_avail >= len )
 263         {
 264                 // Place in the audio buffer
 265                 memcpy( stream, this->audio_buffer, len );
 266
 267                 // Remove len from the audio available
 268                 this->audio_avail -= len;
 269
 270                 // Remove the samples
 271                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 272         }
 273         else
 274         {
 275                 // Just to be safe, wipe the stream first
 276                 memset( stream, 0, len );
 277
 278                 // Copy what we have into the stream
 279                 memcpy( stream, this->audio_buffer, this->audio_avail );
 280
 281                 // Mix the audio
 282                 SDL_MixAudio( stream, stream, len, ( int )( ( double )SDL_MIX_MAXVOLUME * volume ) );
 283
 284                 // No audio left
 285                 this->audio_avail = 0;
 286         }
 287
 288         // We're definitely playing now
 289         this->playing = 1;
 290
 291         pthread_cond_broadcast( &this->audio_cond );
 292         pthread_mutex_unlock( &this->audio_mutex );
 293 }
 294
 295 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 296 {
 297         // Get the properties of this consumer
 298         mlt_properties properties = this->properties;
 299         mlt_audio_format afmt = mlt_audio_pcm;
 300
 301         // Set the preferred params of the test card signal
 302         int channels = mlt_properties_get_int( properties, "channels" );
 303         int frequency = mlt_properties_get_int( properties, "frequency" );
 304         static int counter = 0;
 305
 306         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 307
 308         int16_t *pcm;
 309         int bytes;
 310
 311         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 312         *duration = ( ( samples * 1000 ) / frequency );
 313
 314         if ( mlt_properties_get_int( properties, "audio_off" ) )
 315         {
 316                 this->playing = 1;
 317                 init_audio = 1;
 318                 return init_audio;
 319         }
 320
 321         if ( init_audio == 1 )
 322         {
 323                 SDL_AudioSpec request;
 324                 SDL_AudioSpec got;
 325
 326                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 327
 328                 // specify audio format
 329                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 330                 this->playing = 0;
 331                 request.freq = frequency;
 332                 request.format = AUDIO_S16;
 333                 request.channels = channels;
 334                 request.samples = audio_buffer;
 335                 request.callback = sdl_fill_audio;
 336                 request.userdata = (void *)this;
 337                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 338                 {
 339                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 340                         init_audio = 2;
 341                 }
 342                 else if ( got.size != 0 )
 343                 {
 344                         SDL_PauseAudio( 0 );
 345                         init_audio = 0;
 346                 }
 347         }
 348
 349         if ( init_audio == 0 )
 350         {
 351                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 352                 bytes = ( samples * channels * 2 );
 353                 pthread_mutex_lock( &this->audio_mutex );
 354                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 355                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 356                 if ( this->running )
 357                 {
 358                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 359                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 360                         else
 361                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 362                         this->audio_avail += bytes;
 363                 }
 364                 pthread_cond_broadcast( &this->audio_cond );
 365                 pthread_mutex_unlock( &this->audio_mutex );
 366         }
 367         else
 368         {
 369                 this->playing = 1;
 370         }
 371
 372         return init_audio;
 373 }
 374
 375 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 376 {
 377         // Get the properties of this consumer
 378         mlt_properties properties = this->properties;
 379
 380         mlt_image_format vfmt = mlt_image_yuv422;
 381         int width = this->width, height = this->height;
 382         uint8_t *image;
 383         int changed = 0;
 384
 385         if ( this->running && mlt_properties_get_int( properties, "video_off" ) == 0 )
 386         {
 387                 // Get the image, width and height
 388                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 389                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 390
 391                 // Handle events
 392                 if ( this->sdl_screen != NULL )
 393                 {
 394                         SDL_Event event;
 395
 396                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 397
 398                         while ( SDL_PollEvent( &event ) )
 399                         {
 400                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 401
 402                                 switch( event.type )
 403                                 {
 404                                         case SDL_VIDEORESIZE:
 405                                                 this->window_width = event.resize.w;
 406                                                 this->window_height = event.resize.h;
 407                                                 changed = 1;
 408                                                 break;
 409                                         case SDL_QUIT:
 410                                                 this->running = 0;
 411                                                 break;
 412                                         case SDL_KEYDOWN:
 413                                                 {
 414                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 415                                                         char keyboard[ 2 ] = " ";
 416                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 417                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 418                                                         {
 419                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 420                                                                 callback( producer, keyboard );
 421                                                         }
 422                                                 }
 423                                                 break;
 424                                 }
 425                         }
 426                 }
 427
 428                 if ( width != this->width || height != this->height )
 429                 {
 430                         if ( this->sdl_overlay != NULL )
 431                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 432                         this->sdl_overlay = NULL;
 433                 }
 434
 435                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 436                 {
 437                         // Force an overlay recreation
 438                         if ( this->sdl_overlay != NULL )
 439                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 440                         this->sdl_overlay = NULL;
 441
 442                         // open SDL window with video overlay, if possible
 443                         sdl_lock_display();
 444                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 445                         sdl_unlock_display();
 446                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 447                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 448                         //SDL_Flip( this->sdl_screen );
 449                         mlt_properties_set_int( properties, "changed", 0 );
 450                 }
 451                 else if ( mlt_properties_get_int( properties, "changed" ) )
 452                 {
 453                         sdl_lock_display();
 454                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 455                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 456                         sdl_unlock_display();
 457                         mlt_properties_set_int( properties, "changed", 0 );
 458                 }
 459
 460                 if ( this->running )
 461                 {
 462                         // Determine window's new display aspect ratio
 463                         double this_aspect = ( double )this->window_width / this->window_height;
 464
 465                         // Get the display aspect ratio
 466                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 467
 468                         // Determine frame's display aspect ratio
 469                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 470
 471                         // Store the width and height received
 472                         this->width = width;
 473                         this->height = height;
 474
 475                         // If using hardware scaler
 476                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 477                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 478                         {
 479                                 // Use hardware scaler to normalise display aspect ratio
 480                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 481                                 this->rect.h = this->window_height;
 482                                 if ( this->rect.w > this->window_width )
 483                                 {
 484                                         this->rect.w = this->window_width;
 485                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 486                                 }
 487                         }
 488                         // Special case optimisation to negate odd effect of sample aspect ratio
 489                         // not corresponding exactly with image resolution.
 490                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 491                         {
 492                                 this->rect.w = this->window_width;
 493                                 this->rect.h = this->window_height;
 494                         }
 495                         // Use hardware scaler to normalise sample aspect ratio
 496                         else if ( this->window_height * display_ratio > this->window_width )
 497                         {
 498                                 this->rect.w = this->window_width;
 499                                 this->rect.h = this->window_width / display_ratio;
 500                         }
 501                         else
 502                         {
 503                                 this->rect.w = this->window_height * display_ratio;
 504                                 this->rect.h = this->window_height;
 505                         }
 506
 507                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 508                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 509
 510                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 511                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 512                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 513                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 514
 515                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 516                 }
 517
 518                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 519                 {
 520                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 521                         SDL_Flip( this->sdl_screen );
 522                         sdl_lock_display();
 523                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 524                         sdl_unlock_display();
 525                 }
 526
 527                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 528                 {
 529                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 530                         sdl_lock_display();
 531                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 532                         {
 533                                 if ( image != NULL )
 534                                         memcpy( this->buffer, image, width * height * 2 );
 535                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 536                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 537                         }
 538                         sdl_unlock_display();
 539                 }
 540         }
 541
 542         return 0;
 543 }
 544
 545 static void *video_thread( void *arg )
 546 {
 547         // Identify the arg
 548         consumer_sdl this = arg;
 549
 550 #ifdef __DARWIN__
 551         NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
 552 #endif
 553
 554         // Obtain time of thread start
 555         struct timeval now;
 556         int64_t start = 0;
 557         int64_t elapsed = 0;
 558         struct timespec tm;
 559         mlt_frame next = NULL;
 560         mlt_properties properties = NULL;
 561         double speed = 0;
 562
 563         // Get real time flag
 564         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 565
 566         // Get the current time
 567         gettimeofday( &now, NULL );
 568
 569         // Determine start time
 570         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 571
 572         while ( this->running )
 573         {
 574                 // Pop the next frame
 575                 pthread_mutex_lock( &this->video_mutex );
 576                 next = mlt_deque_pop_front( this->queue );
 577                 while ( next == NULL && this->running )
 578                 {
 579                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 580                         next = mlt_deque_pop_front( this->queue );
 581                 }
 582                 pthread_mutex_unlock( &this->video_mutex );
 583
 584                 if ( !this->running || next == NULL ) break;
 585
 586                 // Get the properties
 587                 properties =  MLT_FRAME_PROPERTIES( next );
 588
 589                 // Get the speed of the frame
 590                 speed = mlt_properties_get_double( properties, "_speed" );
 591
 592                 // Get the current time
 593                 gettimeofday( &now, NULL );
 594
 595                 // Get the elapsed time
 596                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 597
 598                 // See if we have to delay the display of the current frame
 599                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 600                 {
 601                         // Obtain the scheduled playout time
 602                         mlt_position scheduled = mlt_properties_get_position( properties, "playtime" );
 603
 604                         // Determine the difference between the elapsed time and the scheduled playout time
 605                         mlt_position difference = scheduled - elapsed;
 606
 607                         // Smooth playback a bit
 608                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 609                         {
 610                                 tm.tv_sec = difference / 1000000;
 611                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 612                                 nanosleep( &tm, NULL );
 613                         }
 614
 615                         // Show current frame if not too old
 616                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 617                                 consumer_play_video( this, next );
 618
 619                         // If the queue is empty, recalculate start to allow build up again
 620                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 621                         {
 622                                 gettimeofday( &now, NULL );
 623                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 624                         }
 625                 }
 626
 627                 // This frame can now be closed
 628                 mlt_frame_close( next );
 629                 next = NULL;
 630         }
 631
 632         if ( next != NULL )
 633                 mlt_frame_close( next );
 634
 635         mlt_consumer_stopped( &this->parent );
 636
 637 #ifdef __DARWIN__
 638         [pool release];
 639 #endif
 640
 641         return NULL;
 642 }
 643
 644 /** Threaded wrapper for pipe.
 645 */
 646
 647 static void *consumer_thread( void *arg )
 648 {
 649         // Identify the arg
 650         consumer_sdl this = arg;
 651
 652 #ifdef __DARWIN__
 653         NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
 654 #endif
 655
 656         // Get the consumer
 657         mlt_consumer consumer = &this->parent;
 658
 659         // Video thread
 660         pthread_t thread;
 661
 662         // internal intialization
 663         int init_audio = 1;
 664         int init_video = 1;
 665         mlt_frame frame = NULL;
 666         mlt_properties properties = NULL;
 667         int duration = 0;
 668         int64_t playtime = 0;
 669         struct timespec tm = { 0, 100000 };
 670
 671         this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 672
 673         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "sdl_started" ) == 0 )
 674         {
 675                 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 676                 {
 677                         fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 678                         return NULL;
 679                 }
 680
 681                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 682                 SDL_EnableUNICODE( 1 );
 683         }
 684         else
 685         {
 686                 if ( SDL_GetVideoSurface( ) != NULL )
 687                 {
 688                         this->sdl_screen = SDL_GetVideoSurface( );
 689                         consumer_get_dimensions( &this->window_width, &this->window_height );
 690                         mlt_properties_set_int( this->properties, "changed", 0 );
 691                 }
 692         }
 693
 694         if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "audio_off" ) )
 695                 SDL_InitSubSystem( SDL_INIT_AUDIO );
 696
 697         // Loop until told not to
 698         while( this->running )
 699         {
 700                 // Get a frame from the attached producer
 701                 frame = mlt_consumer_rt_frame( consumer );
 702
 703                 // Ensure that we have a frame
 704                 if ( frame != NULL )
 705                 {
 706                         // Get the frame properties
 707                         properties =  MLT_FRAME_PROPERTIES( frame );
 708
 709                         // Play audio
 710                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 711
 712                         // Determine the start time now
 713                         if ( this->playing && init_video )
 714                         {
 715                                 // Create the video thread
 716                                 pthread_create( &thread, NULL, video_thread, this );
 717
 718                                 // Video doesn't need to be initialised any more
 719                                 init_video = 0;
 720                         }
 721
 722                         // Set playtime for this frame
 723                         mlt_properties_set_position( properties, "playtime", playtime );
 724
 725                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 726                                 nanosleep( &tm, NULL );
 727
 728                         // Push this frame to the back of the queue
 729                         pthread_mutex_lock( &this->video_mutex );
 730                         mlt_deque_push_back( this->queue, frame );
 731                         pthread_cond_broadcast( &this->video_cond );
 732                         pthread_mutex_unlock( &this->video_mutex );
 733
 734                         // Calculate the next playtime
 735                         playtime += ( duration * 1000 );
 736                 }
 737         }
 738
 739         // Kill the video thread
 740         if ( init_video == 0 )
 741         {
 742                 pthread_mutex_lock( &this->video_mutex );
 743                 pthread_cond_broadcast( &this->video_cond );
 744                 pthread_mutex_unlock( &this->video_mutex );
 745                 pthread_join( thread, NULL );
 746         }
 747
 748         // internal cleanup
 749         if ( this->sdl_overlay != NULL )
 750                 SDL_FreeYUVOverlay( this->sdl_overlay );
 751
 752         if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "audio_off" ) )
 753                 SDL_QuitSubSystem( SDL_INIT_AUDIO );
 754
 755         //if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "sdl_started" ) == 0 )
 756                 //SDL_Quit( );
 757
 758         while( mlt_deque_count( this->queue ) )
 759                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 760
 761         this->sdl_screen = NULL;
 762         this->sdl_overlay = NULL;
 763         this->audio_avail = 0;
 764
 765 #ifdef __DARWIN__
 766         [pool release];
 767 #endif
 768
 769         return NULL;
 770 }
 771
 772 static int consumer_get_dimensions( int *width, int *height )
 773 {
 774         int changed = 0;
 775
 776         // SDL windows manager structure
 777         SDL_SysWMinfo wm;
 778
 779         // Specify the SDL Version
 780         SDL_VERSION( &wm.version );
 781
 782         // Lock the display
 783         sdl_lock_display();
 784
 785 #ifndef __DARWIN__
 786         // Get the wm structure
 787         if ( SDL_GetWMInfo( &wm ) == 1 )
 788         {
 789                 // Check that we have the X11 wm
 790                 if ( wm.subsystem == SDL_SYSWM_X11 )
 791                 {
 792                         // Get the SDL window
 793                         Window window = wm.info.x11.window;
 794
 795                         // Get the display session
 796                         Display *display = wm.info.x11.display;
 797
 798                         // Get the window attributes
 799                         XWindowAttributes attr;
 800                         XGetWindowAttributes( display, window, &attr );
 801
 802                         // Determine whether window has changed
 803                         changed = *width != attr.width || *height != attr.height;
 804
 805                         // Return width and height
 806                         *width = attr.width;
 807                         *height = attr.height;
 808                 }
 809         }
 810 #endif
 811
 812         // Unlock the display
 813         sdl_lock_display();
 814
 815         return changed;
 816 }
 817
 818 /** Callback to allow override of the close method.
 819 */
 820
 821 static void consumer_close( mlt_consumer parent )
 822 {
 823         // Get the actual object
 824         consumer_sdl this = parent->child;
 825
 826         // Stop the consumer
 827         ///mlt_consumer_stop( parent );
 828
 829         // Now clean up the rest
 830         mlt_consumer_close( parent );
 831
 832         // Close the queue
 833         mlt_deque_close( this->queue );
 834
 835         // Destroy mutexes
 836         pthread_mutex_destroy( &this->audio_mutex );
 837         pthread_cond_destroy( &this->audio_cond );
 838
 839         // Finally clean up this
 840         free( this );
 841 }