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 };
  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
  76 /** This is what will be called by the factory - anything can be passed in
  77         via the argument, but keep it simple.
  78 */
  79
  80 mlt_consumer consumer_sdl_init( char *arg )
  81 {
  82         // Create the consumer object
  83         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  84
  85         // If no malloc'd and consumer init ok
  86         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  87         {
  88                 // Create the queue
  89                 this->queue = mlt_deque_init( );
  90
  91                 // Get the parent consumer object
  92                 mlt_consumer parent = &this->parent;
  93
  94                 // We have stuff to clean up, so override the close method
  95                 parent->close = consumer_close;
  96
  97                 // get a handle on properties
  98                 mlt_service service = mlt_consumer_service( parent );
  99                 this->properties = mlt_service_properties( service );
 100
 101                 // Set the default volume
 102                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 103
 104                 // This is the initialisation of the consumer
 105                 pthread_mutex_init( &this->audio_mutex, NULL );
 106                 pthread_cond_init( &this->audio_cond, NULL);
 107                 pthread_mutex_init( &this->video_mutex, NULL );
 108                 pthread_cond_init( &this->video_cond, NULL);
 109
 110                 // Default scaler (for now we'll use nearest)
 111                 mlt_properties_set( this->properties, "rescale", "nearest" );
 112
 113                 // Default buffer for low latency
 114                 mlt_properties_set_int( this->properties, "buffer", 1 );
 115
 116                 // Default progressive true
 117                 mlt_properties_set_int( this->properties, "progressive", 0 );
 118
 119                 // Default audio buffer
 120                 mlt_properties_set_int( this->properties, "audio_buffer", 1024 );
 121
 122                 // Get sample aspect ratio
 123                 this->aspect_ratio = mlt_properties_get_double( this->properties, "aspect_ratio" );
 124
 125                 // Default display aspect ratio
 126                 this->display_aspect = 4.0 / 3.0;
 127
 128                 // process actual param
 129                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 130                 {
 131                         this->width = mlt_properties_get_int( this->properties, "width" );
 132                         this->height = mlt_properties_get_int( this->properties, "height" );
 133
 134                         // Default window size
 135                         this->window_width = ( float )this->height * this->display_aspect;
 136                         this->window_height = this->height;
 137                 }
 138                 else
 139                 {
 140                         if ( (int)( ( float )this->width / this->height * 1000 ) !=
 141                                  (int)( this->display_aspect * 1000 ) )
 142                         {
 143                                 // Override these
 144                                 this->display_aspect = ( float )this->width / this->height;
 145                                 this->aspect_ratio = 1.0;
 146                                 mlt_properties_set_double( this->properties, "aspect_ratio", this->aspect_ratio );
 147                         }
 148
 149                         // Set window size
 150                         this->window_width = this->width;
 151                         this->window_height = this->height;
 152                 }
 153
 154                 // Set the sdl flags
 155                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 156
 157                 // Allow thread to be started/stopped
 158                 parent->start = consumer_start;
 159                 parent->stop = consumer_stop;
 160                 parent->is_stopped = consumer_is_stopped;
 161
 162                 // Return the consumer produced
 163                 return parent;
 164         }
 165
 166         // malloc or consumer init failed
 167         free( this );
 168
 169         // Indicate failure
 170         return NULL;
 171 }
 172
 173 int consumer_start( mlt_consumer parent )
 174 {
 175         consumer_sdl this = parent->child;
 176
 177         if ( !this->running )
 178         {
 179                 pthread_attr_t thread_attributes;
 180
 181                 this->running = 1;
 182                 this->joined = 0;
 183
 184                 // Allow the user to force resizing to window size
 185                 if ( mlt_properties_get_int( this->properties, "resize" ) )
 186                 {
 187                         mlt_properties_set_int( this->properties, "width", this->width );
 188                         mlt_properties_set_int( this->properties, "height", this->height );
 189                 }
 190
 191                 // Inherit the scheduling priority
 192                 pthread_attr_init( &thread_attributes );
 193                 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
 194
 195                 pthread_create( &this->thread, &thread_attributes, consumer_thread, this );
 196         }
 197
 198         return 0;
 199 }
 200
 201 int consumer_stop( mlt_consumer parent )
 202 {
 203         // Get the actual object
 204         consumer_sdl this = parent->child;
 205
 206         if ( this->joined == 0 )
 207         {
 208                 // Kill the thread and clean up
 209                 this->running = 0;
 210
 211                 pthread_mutex_lock( &this->audio_mutex );
 212                 pthread_cond_broadcast( &this->audio_cond );
 213                 pthread_mutex_unlock( &this->audio_mutex );
 214
 215                 pthread_join( this->thread, NULL );
 216                 this->joined = 1;
 217         }
 218
 219         return 0;
 220 }
 221
 222 int consumer_is_stopped( mlt_consumer parent )
 223 {
 224         consumer_sdl this = parent->child;
 225         return !this->running;
 226 }
 227
 228 static int sdl_lock_display( )
 229 {
 230         SDL_Surface *screen = SDL_GetVideoSurface( );
 231         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 232 }
 233
 234 static void sdl_unlock_display( )
 235 {
 236         SDL_Surface *screen = SDL_GetVideoSurface( );
 237         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 238                 SDL_UnlockSurface( screen );
 239 }
 240
 241 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 242 {
 243         consumer_sdl this = udata;
 244
 245         // Get the volume
 246         float volume = mlt_properties_get_double( this->properties, "volume" );
 247
 248         pthread_mutex_lock( &this->audio_mutex );
 249
 250         // Block until audio received
 251         while ( this->running && len > this->audio_avail )
 252                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 253
 254         if ( this->audio_avail >= len )
 255         {
 256                 // Place in the audio buffer
 257                 memcpy( stream, this->audio_buffer, len );
 258
 259                 // Remove len from the audio available
 260                 this->audio_avail -= len;
 261
 262                 // Remove the samples
 263                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 264         }
 265         else
 266         {
 267                 // Just to be safe, wipe the stream first
 268                 memset( stream, 0, len );
 269
 270                 // Copy what we have into the stream
 271                 memcpy( stream, this->audio_buffer, this->audio_avail );
 272
 273                 // Mix the audio
 274                 SDL_MixAudio( stream, stream, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 275
 276                 // No audio left
 277                 this->audio_avail = 0;
 278         }
 279
 280         // We're definitely playing now
 281         this->playing = 1;
 282
 283         pthread_cond_broadcast( &this->audio_cond );
 284         pthread_mutex_unlock( &this->audio_mutex );
 285 }
 286
 287 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 288 {
 289         // Get the properties of this consumer
 290         mlt_properties properties = this->properties;
 291         mlt_audio_format afmt = mlt_audio_pcm;
 292
 293         // Set the preferred params of the test card signal
 294         int channels = mlt_properties_get_int( properties, "channels" );
 295         int frequency = mlt_properties_get_int( properties, "frequency" );
 296         static int counter = 0;
 297
 298         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 299
 300         int16_t *pcm;
 301         int bytes;
 302
 303         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 304         *duration = ( ( samples * 1000 ) / frequency );
 305
 306         if ( mlt_properties_get_int( properties, "audio_off" ) )
 307         {
 308                 this->playing = 1;
 309                 init_audio = 1;
 310                 return init_audio;
 311         }
 312
 313         if ( init_audio == 1 )
 314         {
 315                 SDL_AudioSpec request;
 316                 SDL_AudioSpec got;
 317
 318                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 319
 320                 // specify audio format
 321                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 322                 this->playing = 0;
 323                 request.freq = frequency;
 324                 request.format = AUDIO_S16;
 325                 request.channels = channels;
 326                 request.samples = audio_buffer;
 327                 request.callback = sdl_fill_audio;
 328                 request.userdata = (void *)this;
 329                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 330                 {
 331                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 332                         init_audio = 2;
 333                 }
 334                 else if ( got.size != 0 )
 335                 {
 336                         SDL_PauseAudio( 0 );
 337                         init_audio = 0;
 338                 }
 339         }
 340
 341         if ( init_audio == 0 )
 342         {
 343                 mlt_properties properties = mlt_frame_properties( frame );
 344                 bytes = ( samples * channels * 2 );
 345                 pthread_mutex_lock( &this->audio_mutex );
 346                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 347                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 348                 if ( this->running )
 349                 {
 350                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 351                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 352                         else
 353                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 354                         this->audio_avail += bytes;
 355                 }
 356                 pthread_cond_broadcast( &this->audio_cond );
 357                 pthread_mutex_unlock( &this->audio_mutex );
 358         }
 359         else
 360         {
 361                 this->playing = 1;
 362         }
 363
 364         return init_audio;
 365 }
 366
 367 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 368 {
 369         // Get the properties of this consumer
 370         mlt_properties properties = this->properties;
 371
 372         mlt_image_format vfmt = mlt_image_yuv422;
 373         int width = this->width, height = this->height;
 374         uint8_t *image;
 375         int changed = 0;
 376
 377         if ( mlt_properties_get_int( properties, "video_off" ) == 0 )
 378         {
 379                 // Get the image, width and height
 380                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 381
 382                 // Handle events
 383                 if ( this->sdl_screen != NULL )
 384                 {
 385                         SDL_Event event;
 386
 387                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 388
 389                         while ( SDL_PollEvent( &event ) )
 390                         {
 391                                 switch( event.type )
 392                                 {
 393                                         case SDL_VIDEORESIZE:
 394                                                 this->window_width = event.resize.w;
 395                                                 this->window_height = event.resize.h;
 396                                                 changed = 1;
 397                                                 break;
 398                                         case SDL_QUIT:
 399                                                 this->running = 0;
 400                                                 break;
 401                                         case SDL_KEYDOWN:
 402                                                 {
 403                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 404                                                         char keyboard[ 2 ] = " ";
 405                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 406                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 407                                                         {
 408                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 409                                                                 callback( producer, keyboard );
 410                                                         }
 411                                                 }
 412                                                 break;
 413                                 }
 414                         }
 415                 }
 416
 417                 if ( width != this->width || height != this->height || this->last_frame_aspect != mlt_frame_get_aspect_ratio( frame ) )
 418                 {
 419                         this->width = width;
 420                         this->height = height;
 421                         this->last_frame_aspect = mlt_frame_get_aspect_ratio( frame );
 422                         changed = 1;
 423                 }
 424
 425                 if ( this->sdl_screen == NULL || changed )
 426                 {
 427                         // Determine frame's display aspect ratio
 428                         float frame_aspect = mlt_frame_get_aspect_ratio( frame ) * this->width / this->height;
 429
 430                         // Determine window's new display aspect ratio
 431                         float this_aspect = ( float )this->window_width / this->window_height;
 432
 433                         // If using hardware scaler
 434                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 435                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 436                         {
 437                                 // Special case optimisation to negate odd effect of sample aspect ratio
 438                                 // not corresponding exactly with image resolution.
 439                                 if ( ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) ) &&
 440                                          ( (int)( mlt_frame_get_aspect_ratio( frame ) * 1000 ) == (int)( this->aspect_ratio * 1000 ) ) )
 441                                 {
 442                                         this->rect.w = this->window_width;
 443                                         this->rect.h = this->window_height;
 444                                 }
 445                                 else
 446                                 {
 447                                         // Use hardware scaler to normalise display aspect ratio
 448                                         this->rect.w = frame_aspect / this_aspect * this->window_width;
 449                                         this->rect.h = this->window_height;
 450                                         if ( this->rect.w > this->window_width )
 451                                         {
 452                                                 this->rect.w = this->window_width;
 453                                                 this->rect.h = this_aspect / frame_aspect * this->window_height;
 454                                         }
 455                                 }
 456                         }
 457                         // Special case optimisation to negate odd effect of sample aspect ratio
 458                         // not corresponding exactly with image resolution.
 459                         else if ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) )
 460                         {
 461                                 this->rect.w = this->window_width;
 462                                 this->rect.h = this->window_height;
 463                         }
 464                         // Use hardware scaler to normalise sample aspect ratio
 465                         else if ( this->window_height * this->display_aspect > this->window_width )
 466                         {
 467                                 this->rect.w = this->window_width;
 468                                 this->rect.h = this->window_width / this->display_aspect;
 469                         }
 470                         else
 471                         {
 472                                 this->rect.w = this->window_height * this->display_aspect;
 473                                 this->rect.h = this->window_height;
 474                         }
 475
 476                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 477                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 478
 479                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 480                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 481                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 482                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 483
 484                         // Force an overlay recreation
 485                         if ( this->sdl_overlay != NULL )
 486                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 487
 488                         // open SDL window with video overlay, if possible
 489                         sdl_lock_display();
 490                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 491                         sdl_unlock_display();
 492
 493                         if ( this->sdl_screen != NULL )
 494                         {
 495                                 SDL_SetClipRect( this->sdl_screen, &this->rect );
 496                                 sdl_lock_display();
 497                                 this->sdl_overlay = SDL_CreateYUVOverlay( this->width, this->height, SDL_YUY2_OVERLAY, this->sdl_screen );
 498                                 sdl_unlock_display();
 499                         }
 500                 }
 501
 502                 if ( mlt_properties_get_int( properties, "changed" ) )
 503                 {
 504                         sdl_lock_display();
 505                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 506                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 507                         SDL_Flip( this->sdl_screen );
 508                         sdl_unlock_display();
 509                         mlt_properties_set_int( properties, "changed", 0 );
 510                 }
 511
 512                 if ( this->sdl_screen != NULL && this->sdl_overlay != NULL )
 513                 {
 514                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 515                         sdl_lock_display();
 516                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 517                         {
 518                                 if ( image != NULL )
 519                                         memcpy( this->buffer, image, width * height * 2 );
 520                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 521                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 522                         }
 523                         sdl_unlock_display();
 524                 }
 525         }
 526
 527         return 0;
 528 }
 529
 530 static void *video_thread( void *arg )
 531 {
 532         // Identify the arg
 533         consumer_sdl this = arg;
 534
 535         // Obtain time of thread start
 536         struct timeval now;
 537         int64_t start = 0;
 538         int64_t elapsed = 0;
 539         struct timespec tm;
 540         mlt_frame next = NULL;
 541         mlt_properties properties = NULL;
 542         double speed = 0;
 543
 544         // Get real time flag
 545         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 546
 547         // Get the current time
 548         gettimeofday( &now, NULL );
 549
 550         // Determine start time
 551         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 552
 553         while ( this->running )
 554         {
 555                 // Pop the next frame
 556                 pthread_mutex_lock( &this->video_mutex );
 557                 while ( ( next = mlt_deque_pop_front( this->queue ) ) == NULL && this->running )
 558                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 559                 pthread_mutex_unlock( &this->video_mutex );
 560
 561                 // Get the properties
 562                 properties =  mlt_frame_properties( next );
 563
 564                 // Get the speed of the frame
 565                 speed = mlt_properties_get_double( properties, "_speed" );
 566
 567                 // Get the current time
 568                 gettimeofday( &now, NULL );
 569
 570                 // Get the elapsed time
 571                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 572
 573                 // See if we have to delay the display of the current frame
 574                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 575                 {
 576                         // Obtain the scheduled playout time
 577                         mlt_position scheduled = mlt_properties_get_position( properties, "playtime" );
 578
 579                         // Determine the difference between the elapsed time and the scheduled playout time
 580                         mlt_position difference = scheduled - elapsed;
 581
 582                         // Smooth playback a bit
 583                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 584                         {
 585                                 tm.tv_sec = difference / 1000000;
 586                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 587                                 nanosleep( &tm, NULL );
 588                         }
 589
 590                         // Show current frame if not too old
 591                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 592                                 consumer_play_video( this, next );
 593
 594                         // If the queue is empty, recalculate start to allow build up again
 595                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 596                         {
 597                                 gettimeofday( &now, NULL );
 598                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 599                         }
 600                 }
 601
 602                 // This frame can now be closed
 603                 mlt_frame_close( next );
 604         }
 605
 606         mlt_consumer_stopped( &this->parent );
 607
 608         return NULL;
 609 }
 610
 611 /** Threaded wrapper for pipe.
 612 */
 613
 614 static void *consumer_thread( void *arg )
 615 {
 616         // Identify the arg
 617         consumer_sdl this = arg;
 618
 619         // Get the consumer
 620         mlt_consumer consumer = &this->parent;
 621
 622         // Video thread
 623         pthread_t thread;
 624
 625         // internal intialization
 626         int init_audio = 1;
 627         int init_video = 1;
 628         mlt_frame frame = NULL;
 629         mlt_properties properties = NULL;
 630         int duration = 0;
 631         int64_t playtime = 0;
 632         struct timespec tm = { 0, 100000 };
 633
 634         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_NOPARACHUTE ) < 0 )
 635         {
 636                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 637                 return NULL;
 638         }
 639
 640         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 641         SDL_EnableUNICODE( 1 );
 642
 643         // Loop until told not to
 644         while( this->running )
 645         {
 646                 // Get a frame from the attached producer
 647                 frame = mlt_consumer_rt_frame( consumer );
 648
 649                 // Ensure that we have a frame
 650                 if ( frame != NULL )
 651                 {
 652                         // Get the frame properties
 653                         properties =  mlt_frame_properties( frame );
 654
 655                         // Play audio
 656                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 657
 658                         // Determine the start time now
 659                         if ( this->playing && init_video )
 660                         {
 661                                 // Create the video thread
 662                                 pthread_create( &thread, NULL, video_thread, this );
 663
 664                                 // Video doesn't need to be initialised any more
 665                                 init_video = 0;
 666                         }
 667
 668                         // Set playtime for this frame
 669                         mlt_properties_set_position( properties, "playtime", playtime );
 670
 671                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 672                                 nanosleep( &tm, NULL );
 673
 674                         // Push this frame to the back of the queue
 675                         pthread_mutex_lock( &this->video_mutex );
 676                         mlt_deque_push_back( this->queue, frame );
 677                         pthread_cond_broadcast( &this->video_cond );
 678                         pthread_mutex_unlock( &this->video_mutex );
 679
 680                         // Calculate the next playtime
 681                         playtime += ( duration * 1000 );
 682                 }
 683         }
 684
 685         // Kill the video thread
 686         if ( init_video == 0 )
 687         {
 688                 pthread_mutex_lock( &this->video_mutex );
 689                 pthread_cond_broadcast( &this->video_cond );
 690                 pthread_mutex_unlock( &this->video_mutex );
 691                 pthread_join( thread, NULL );
 692         }
 693
 694         // internal cleanup
 695         if ( this->sdl_overlay != NULL )
 696                 SDL_FreeYUVOverlay( this->sdl_overlay );
 697         SDL_Quit( );
 698
 699         while( mlt_deque_count( this->queue ) )
 700                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 701
 702         this->sdl_screen = NULL;
 703         this->sdl_overlay = NULL;
 704         this->audio_avail = 0;
 705
 706         return NULL;
 707 }
 708
 709 static int consumer_get_dimensions( int *width, int *height )
 710 {
 711         int changed = 0;
 712
 713         // SDL windows manager structure
 714         SDL_SysWMinfo wm;
 715
 716         // Specify the SDL Version
 717         SDL_VERSION( &wm.version );
 718
 719         // Lock the display
 720         sdl_lock_display();
 721
 722         // Get the wm structure
 723         if ( SDL_GetWMInfo( &wm ) == 1 )
 724         {
 725                 // Check that we have the X11 wm
 726                 if ( wm.subsystem == SDL_SYSWM_X11 )
 727                 {
 728                         // Get the SDL window
 729                         Window window = wm.info.x11.window;
 730
 731                         // Get the display session
 732                         Display *display = wm.info.x11.display;
 733
 734                         // Get the window attributes
 735                         XWindowAttributes attr;
 736                         XGetWindowAttributes( display, window, &attr );
 737
 738                         // Determine whether window has changed
 739                         changed = *width != attr.width || *height != attr.height;
 740
 741                         // Return width and height
 742                         *width = attr.width;
 743                         *height = attr.height;
 744                 }
 745         }
 746
 747         // Unlock the display
 748         sdl_lock_display();
 749
 750         return changed;
 751 }
 752
 753 /** Callback to allow override of the close method.
 754 */
 755
 756 static void consumer_close( mlt_consumer parent )
 757 {
 758         // Get the actual object
 759         consumer_sdl this = parent->child;
 760
 761         // Stop the consumer
 762         mlt_consumer_stop( parent );
 763
 764         // Close the queue
 765         mlt_deque_close( this->queue );
 766
 767         // Destroy mutexes
 768         pthread_mutex_destroy( &this->audio_mutex );
 769         pthread_cond_destroy( &this->audio_cond );
 770
 771         // Now clean up the rest
 772         mlt_consumer_close( parent );
 773
 774         // Finally clean up this
 775         free( this );
 776 }