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                         this->sdl_screen = SDL_GetVideoSurface( );
 198                 }
 199
 200                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 201                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 202
 203                 if ( this->sdl_screen == NULL )
 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                 // Mix the audio
 293                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 294
 295                 // No audio left
 296                 this->audio_avail = 0;
 297         }
 298
 299         // We're definitely playing now
 300         this->playing = 1;
 301
 302         pthread_cond_broadcast( &this->audio_cond );
 303         pthread_mutex_unlock( &this->audio_mutex );
 304 }
 305
 306 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 307 {
 308         // Get the properties of this consumer
 309         mlt_properties properties = this->properties;
 310         mlt_audio_format afmt = mlt_audio_pcm;
 311
 312         // Set the preferred params of the test card signal
 313         int channels = mlt_properties_get_int( properties, "channels" );
 314         int frequency = mlt_properties_get_int( properties, "frequency" );
 315         static int counter = 0;
 316
 317         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 318
 319         int16_t *pcm;
 320         int bytes;
 321
 322         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 323         *duration = ( ( samples * 1000 ) / frequency );
 324
 325         if ( mlt_properties_get_int( properties, "audio_off" ) )
 326         {
 327                 this->playing = 1;
 328                 init_audio = 1;
 329                 return init_audio;
 330         }
 331
 332         if ( init_audio == 1 )
 333         {
 334                 SDL_AudioSpec request;
 335                 SDL_AudioSpec got;
 336
 337                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 338
 339                 // specify audio format
 340                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 341                 this->playing = 0;
 342                 request.freq = frequency;
 343                 request.format = AUDIO_S16SYS;
 344                 request.channels = channels;
 345                 request.samples = audio_buffer;
 346                 request.callback = sdl_fill_audio;
 347                 request.userdata = (void *)this;
 348                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 349                 {
 350                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 351                         init_audio = 2;
 352                 }
 353                 else if ( got.size != 0 )
 354                 {
 355                         SDL_PauseAudio( 0 );
 356                         init_audio = 0;
 357                 }
 358         }
 359
 360         if ( init_audio == 0 )
 361         {
 362                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 363                 bytes = ( samples * channels * 2 );
 364                 pthread_mutex_lock( &this->audio_mutex );
 365                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 366                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 367                 if ( this->running )
 368                 {
 369                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 370                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 371                         else
 372                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 373                         this->audio_avail += bytes;
 374                 }
 375                 pthread_cond_broadcast( &this->audio_cond );
 376                 pthread_mutex_unlock( &this->audio_mutex );
 377         }
 378         else
 379         {
 380                 this->playing = 1;
 381         }
 382
 383         return init_audio;
 384 }
 385
 386 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 387 {
 388         // Get the properties of this consumer
 389         mlt_properties properties = this->properties;
 390
 391         mlt_image_format vfmt = mlt_image_yuv422;
 392         int width = this->width, height = this->height;
 393         uint8_t *image;
 394         int changed = 0;
 395
 396         if ( this->running && mlt_properties_get_int( properties, "video_off" ) == 0 )
 397         {
 398                 // Get the image, width and height
 399                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 400                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 401
 402                 // Handle events
 403                 if ( this->sdl_screen != NULL )
 404                 {
 405                         SDL_Event event;
 406
 407                         sdl_lock_display( );
 408                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 409                         sdl_unlock_display( );
 410
 411                         while ( SDL_PollEvent( &event ) )
 412                         {
 413                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 414
 415                                 switch( event.type )
 416                                 {
 417                                         case SDL_VIDEORESIZE:
 418                                                 this->window_width = event.resize.w;
 419                                                 this->window_height = event.resize.h;
 420                                                 changed = 1;
 421                                                 break;
 422                                         case SDL_QUIT:
 423                                                 this->running = 0;
 424                                                 break;
 425                                         case SDL_KEYDOWN:
 426                                                 {
 427                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 428                                                         char keyboard[ 2 ] = " ";
 429                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 430                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 431                                                         {
 432                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 433                                                                 callback( producer, keyboard );
 434                                                         }
 435                                                 }
 436                                                 break;
 437                                 }
 438                         }
 439                 }
 440
 441                 sdl_lock_display();
 442
 443                 if ( width != this->width || height != this->height )
 444                 {
 445                         if ( this->sdl_overlay != NULL )
 446                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 447                         this->sdl_overlay = NULL;
 448                 }
 449
 450                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 451                 {
 452                         // Force an overlay recreation
 453                         if ( this->sdl_overlay != NULL )
 454                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 455                         this->sdl_overlay = NULL;
 456
 457                         // open SDL window with video overlay, if possible
 458                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 459                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 460                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 461                 }
 462
 463                 if ( this->running )
 464                 {
 465                         // Determine window's new display aspect ratio
 466                         double this_aspect = ( double )this->window_width / this->window_height;
 467
 468                         // Get the display aspect ratio
 469                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 470
 471                         // Determine frame's display aspect ratio
 472                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 473
 474                         // Store the width and height received
 475                         this->width = width;
 476                         this->height = height;
 477
 478                         // If using hardware scaler
 479                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 480                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 481                         {
 482                                 // Use hardware scaler to normalise display aspect ratio
 483                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 484                                 this->rect.h = this->window_height;
 485                                 if ( this->rect.w > this->window_width )
 486                                 {
 487                                         this->rect.w = this->window_width;
 488                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 489                                 }
 490                         }
 491                         // Special case optimisation to negate odd effect of sample aspect ratio
 492                         // not corresponding exactly with image resolution.
 493                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 494                         {
 495                                 this->rect.w = this->window_width;
 496                                 this->rect.h = this->window_height;
 497                         }
 498                         // Use hardware scaler to normalise sample aspect ratio
 499                         else if ( this->window_height * display_ratio > this->window_width )
 500                         {
 501                                 this->rect.w = this->window_width;
 502                                 this->rect.h = this->window_width / display_ratio;
 503                         }
 504                         else
 505                         {
 506                                 this->rect.w = this->window_height * display_ratio;
 507                                 this->rect.h = this->window_height;
 508                         }
 509
 510                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 511                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 512
 513                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 514                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 515                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 516                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 517
 518                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 519                 }
 520
 521                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 522                 {
 523                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 524                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 525                 }
 526
 527                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 528                 {
 529                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 530                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 531                         {
 532                                 if ( image != NULL )
 533                                         memcpy( this->buffer, image, width * height * 2 );
 534                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 535                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 536                         }
 537                 }
 538
 539                 sdl_unlock_display();
 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         // Obtain time of thread start
 551         struct timeval now;
 552         int64_t start = 0;
 553         int64_t elapsed = 0;
 554         struct timespec tm;
 555         mlt_frame next = NULL;
 556         mlt_properties properties = NULL;
 557         double speed = 0;
 558
 559         // Get real time flag
 560         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 561
 562         // Get the current time
 563         gettimeofday( &now, NULL );
 564
 565         // Determine start time
 566         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 567
 568         while ( this->running )
 569         {
 570                 // Pop the next frame
 571                 pthread_mutex_lock( &this->video_mutex );
 572                 next = mlt_deque_pop_front( this->queue );
 573                 while ( next == NULL && this->running )
 574                 {
 575                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 576                         next = mlt_deque_pop_front( this->queue );
 577                 }
 578                 pthread_mutex_unlock( &this->video_mutex );
 579
 580                 if ( !this->running || next == NULL ) break;
 581
 582                 // Get the properties
 583                 properties =  MLT_FRAME_PROPERTIES( next );
 584
 585                 // Get the speed of the frame
 586                 speed = mlt_properties_get_double( properties, "_speed" );
 587
 588                 // Get the current time
 589                 gettimeofday( &now, NULL );
 590
 591                 // Get the elapsed time
 592                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 593
 594                 // See if we have to delay the display of the current frame
 595                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 596                 {
 597                         // Obtain the scheduled playout time
 598                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 599
 600                         // Determine the difference between the elapsed time and the scheduled playout time
 601                         int64_t difference = scheduled - elapsed;
 602
 603                         // Smooth playback a bit
 604                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 605                         {
 606                                 tm.tv_sec = difference / 1000000;
 607                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 608                                 nanosleep( &tm, NULL );
 609                         }
 610
 611                         // Show current frame if not too old
 612                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 613                                 consumer_play_video( this, next );
 614
 615                         // If the queue is empty, recalculate start to allow build up again
 616                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 617                         {
 618                                 gettimeofday( &now, NULL );
 619                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 620                         }
 621                 }
 622
 623                 // This frame can now be closed
 624                 mlt_frame_close( next );
 625                 next = NULL;
 626         }
 627
 628         if ( next != NULL )
 629                 mlt_frame_close( next );
 630
 631         mlt_consumer_stopped( &this->parent );
 632
 633         return NULL;
 634 }
 635
 636 /** Threaded wrapper for pipe.
 637 */
 638
 639 static void *consumer_thread( void *arg )
 640 {
 641         // Identify the arg
 642         consumer_sdl this = arg;
 643
 644         // Get the consumer
 645         mlt_consumer consumer = &this->parent;
 646
 647         // Video thread
 648         pthread_t thread;
 649
 650         // internal intialization
 651         int init_audio = 1;
 652         int init_video = 1;
 653         mlt_frame frame = NULL;
 654         mlt_properties properties = NULL;
 655         int duration = 0;
 656         int64_t playtime = 0;
 657         struct timespec tm = { 0, 100000 };
 658
 659         // Loop until told not to
 660         while( this->running )
 661         {
 662                 // Get a frame from the attached producer
 663                 frame = mlt_consumer_rt_frame( consumer );
 664
 665                 // Ensure that we have a frame
 666                 if ( frame != NULL )
 667                 {
 668                         // Get the frame properties
 669                         properties =  MLT_FRAME_PROPERTIES( frame );
 670
 671                         // Play audio
 672                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 673
 674                         // Determine the start time now
 675                         if ( this->playing && init_video )
 676                         {
 677                                 // Create the video thread
 678                                 pthread_create( &thread, NULL, video_thread, this );
 679
 680                                 // Video doesn't need to be initialised any more
 681                                 init_video = 0;
 682                         }
 683
 684                         // Set playtime for this frame
 685                         mlt_properties_set_int( properties, "playtime", playtime );
 686
 687                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 688                                 nanosleep( &tm, NULL );
 689
 690                         // Push this frame to the back of the queue
 691                         pthread_mutex_lock( &this->video_mutex );
 692                         mlt_deque_push_back( this->queue, frame );
 693                         pthread_cond_broadcast( &this->video_cond );
 694                         pthread_mutex_unlock( &this->video_mutex );
 695
 696                         // Calculate the next playtime
 697                         playtime += ( duration * 1000 );
 698                 }
 699         }
 700
 701         // Kill the video thread
 702         if ( init_video == 0 )
 703         {
 704                 pthread_mutex_lock( &this->video_mutex );
 705                 pthread_cond_broadcast( &this->video_cond );
 706                 pthread_mutex_unlock( &this->video_mutex );
 707                 pthread_join( thread, NULL );
 708         }
 709
 710         while( mlt_deque_count( this->queue ) )
 711                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 712
 713         this->sdl_screen = NULL;
 714         this->audio_avail = 0;
 715
 716         return NULL;
 717 }
 718
 719 static int consumer_get_dimensions( int *width, int *height )
 720 {
 721         int changed = 0;
 722
 723         // SDL windows manager structure
 724         SDL_SysWMinfo wm;
 725
 726         // Specify the SDL Version
 727         SDL_VERSION( &wm.version );
 728
 729         // Lock the display
 730         //sdl_lock_display();
 731
 732 #ifndef __DARWIN__
 733         // Get the wm structure
 734         if ( SDL_GetWMInfo( &wm ) == 1 )
 735         {
 736                 // Check that we have the X11 wm
 737                 if ( wm.subsystem == SDL_SYSWM_X11 )
 738                 {
 739                         // Get the SDL window
 740                         Window window = wm.info.x11.window;
 741
 742                         // Get the display session
 743                         Display *display = wm.info.x11.display;
 744
 745                         // Get the window attributes
 746                         XWindowAttributes attr;
 747                         XGetWindowAttributes( display, window, &attr );
 748
 749                         // Determine whether window has changed
 750                         changed = *width != attr.width || *height != attr.height;
 751
 752                         // Return width and height
 753                         *width = attr.width;
 754                         *height = attr.height;
 755                 }
 756         }
 757 #endif
 758
 759         // Unlock the display
 760         //sdl_unlock_display();
 761
 762         return changed;
 763 }
 764
 765 /** Callback to allow override of the close method.
 766 */
 767
 768 static void consumer_close( mlt_consumer parent )
 769 {
 770         // Get the actual object
 771         consumer_sdl this = parent->child;
 772
 773         // Stop the consumer
 774         ///mlt_consumer_stop( parent );
 775
 776         // Now clean up the rest
 777         mlt_consumer_close( parent );
 778
 779         // Close the queue
 780         mlt_deque_close( this->queue );
 781
 782         // Destroy mutexes
 783         pthread_mutex_destroy( &this->audio_mutex );
 784         pthread_cond_destroy( &this->audio_cond );
 785
 786         // Finally clean up this
 787         free( this );
 788 }