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 library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt_consumer.h>
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <framework/mlt_factory.h>
  25 #include <framework/mlt_filter.h>
  26 #include <framework/mlt_log.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <pthread.h>
  31 #include <SDL/SDL.h>
  32 #include <SDL/SDL_syswm.h>
  33 #include <sys/time.h>
  34
  35 extern pthread_mutex_t mlt_sdl_mutex;
  36
  37 /** This classes definition.
  38 */
  39
  40 typedef struct consumer_sdl_s *consumer_sdl;
  41
  42 struct consumer_sdl_s
  43 {
  44         struct mlt_consumer_s parent;
  45         mlt_properties properties;
  46         mlt_deque queue;
  47         pthread_t thread;
  48         int joined;
  49         int running;
  50         uint8_t audio_buffer[ 4096 * 10 ];
  51         int audio_avail;
  52         pthread_mutex_t audio_mutex;
  53         pthread_cond_t audio_cond;
  54         pthread_mutex_t video_mutex;
  55         pthread_cond_t video_cond;
  56         int window_width;
  57         int window_height;
  58         int previous_width;
  59         int previous_height;
  60         int width;
  61         int height;
  62         int playing;
  63         int sdl_flags;
  64         SDL_Surface *sdl_screen;
  65         SDL_Overlay *sdl_overlay;
  66         SDL_Rect rect;
  67         uint8_t *buffer;
  68         int bpp;
  69 };
  70
  71 /** Forward references to static functions.
  72 */
  73
  74 static int consumer_start( mlt_consumer parent );
  75 static int consumer_stop( mlt_consumer parent );
  76 static int consumer_is_stopped( mlt_consumer parent );
  77 static void consumer_close( mlt_consumer parent );
  78 static void *consumer_thread( void * );
  79 static int consumer_get_dimensions( int *width, int *height );
  80 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  81
  82 /** This is what will be called by the factory - anything can be passed in
  83         via the argument, but keep it simple.
  84 */
  85
  86 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  87 {
  88         // Create the consumer object
  89         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  90
  91         // If no malloc'd and consumer init ok
  92         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  93         {
  94                 // Create the queue
  95                 this->queue = mlt_deque_init( );
  96
  97                 // Get the parent consumer object
  98                 mlt_consumer parent = &this->parent;
  99
 100                 // We have stuff to clean up, so override the close method
 101                 parent->close = consumer_close;
 102
 103                 // get a handle on properties
 104                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 105                 this->properties = MLT_SERVICE_PROPERTIES( service );
 106
 107                 // Set the default volume
 108                 mlt_properties_set_double( this->properties, "volume", 1.0 );
 109
 110                 // This is the initialisation of the consumer
 111                 pthread_mutex_init( &this->audio_mutex, NULL );
 112                 pthread_cond_init( &this->audio_cond, NULL);
 113                 pthread_mutex_init( &this->video_mutex, NULL );
 114                 pthread_cond_init( &this->video_cond, NULL);
 115
 116                 // Default scaler (for now we'll use nearest)
 117                 mlt_properties_set( this->properties, "rescale", "nearest" );
 118
 119                 // Default buffer for low latency
 120                 mlt_properties_set_int( this->properties, "buffer", 1 );
 121
 122                 // Default audio buffer
 123                 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
 124
 125                 // Ensure we don't join on a non-running object
 126                 this->joined = 1;
 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
 135                 // Set the sdl flags
 136                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 137
 138                 // Allow thread to be started/stopped
 139                 parent->start = consumer_start;
 140                 parent->stop = consumer_stop;
 141                 parent->is_stopped = consumer_is_stopped;
 142
 143                 // Register specific events
 144                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 145
 146                 // Return the consumer produced
 147                 return parent;
 148         }
 149
 150         // malloc or consumer init failed
 151         free( this );
 152
 153         // Indicate failure
 154         return NULL;
 155 }
 156
 157 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 158 {
 159         if ( listener != NULL )
 160                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 161 }
 162
 163 int consumer_start( mlt_consumer parent )
 164 {
 165         consumer_sdl this = parent->child;
 166
 167         if ( !this->running )
 168         {
 169                 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
 170                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 171                 int display_off = video_off | preview_off;
 172                 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
 173                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 174
 175                 consumer_stop( parent );
 176
 177                 this->running = 1;
 178                 this->joined = 0;
 179
 180                 if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
 181                         this->width = mlt_properties_get_int( this->properties, "width" );
 182                 if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
 183                         this->height = mlt_properties_get_int( this->properties, "height" );
 184
 185                 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
 186
 187                 if ( sdl_started == 0 && display_off == 0 )
 188                 {
 189                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 190                         {
 191                                 mlt_log_error( MLT_CONSUMER_SERVICE(parent), "Failed to initialize SDL: %s\n", SDL_GetError() );
 192                                 return -1;
 193                         }
 194
 195                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 196                         SDL_EnableUNICODE( 1 );
 197
 198 #ifndef __DARWIN__
 199                         // Get the wm structure
 200                         SDL_SysWMinfo wm;
 201                         SDL_VERSION( &wm.version );
 202                         // Only on X11
 203                         if ( SDL_GetWMInfo( &wm ) == 1 && wm.subsystem == SDL_SYSWM_X11 )
 204                         {
 205                                 // Set the x11_display property for use by VDPAU
 206                                 mlt_properties_set_int( this->properties, "x11_display", (int) wm.info.x11.display );
 207                                 mlt_log_verbose( MLT_CONSUMER_SERVICE(parent), "X11 Display = %p\n", wm.info.x11.display );
 208                                 char tmp[20];
 209                                 sprintf( tmp, "%p", wm.info.x11.display );
 210                                 mlt_environment_set( "x11_display", tmp );
 211                         }
 212 #endif
 213                 }
 214                 else if ( display_off == 0 )
 215                 {
 216                         this->sdl_screen = SDL_GetVideoSurface( );
 217                 }
 218
 219                 if ( audio_off == 0 )
 220                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 221
 222                 // Default window size
 223                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 224                 this->window_width = ( double )this->height * display_ratio;
 225                 this->window_height = this->height;
 226
 227                 if ( this->sdl_screen == NULL && display_off == 0 )
 228                 {
 229                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 230                         {
 231                                 const SDL_VideoInfo *vi = SDL_GetVideoInfo();
 232                                 this->window_width = vi->current_w;
 233                                 this->window_height = vi->current_h;
 234                                 this->sdl_flags |= SDL_FULLSCREEN;
 235                                 SDL_ShowCursor( SDL_DISABLE );
 236                         }
 237                         pthread_mutex_lock( &mlt_sdl_mutex );
 238                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 239                         pthread_mutex_unlock( &mlt_sdl_mutex );
 240                 }
 241
 242                 pthread_create( &this->thread, NULL, consumer_thread, this );
 243         }
 244
 245         return 0;
 246 }
 247
 248 int consumer_stop( mlt_consumer parent )
 249 {
 250         // Get the actual object
 251         consumer_sdl this = parent->child;
 252
 253         if ( this->joined == 0 )
 254         {
 255                 // Kill the thread and clean up
 256                 this->joined = 1;
 257                 this->running = 0;
 258                 if ( this->thread )
 259                         pthread_join( this->thread, NULL );
 260
 261                 // internal cleanup
 262                 if ( this->sdl_overlay != NULL )
 263                         SDL_FreeYUVOverlay( this->sdl_overlay );
 264                 this->sdl_overlay = NULL;
 265
 266                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 267                 {
 268                         pthread_mutex_lock( &this->audio_mutex );
 269                         pthread_cond_broadcast( &this->audio_cond );
 270                         pthread_mutex_unlock( &this->audio_mutex );
 271                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 272                 }
 273
 274                 this->sdl_screen = NULL;
 275         }
 276
 277         return 0;
 278 }
 279
 280 int consumer_is_stopped( mlt_consumer parent )
 281 {
 282         consumer_sdl this = parent->child;
 283         return !this->running;
 284 }
 285
 286 static int sdl_lock_display( )
 287 {
 288         pthread_mutex_lock( &mlt_sdl_mutex );
 289         SDL_Surface *screen = SDL_GetVideoSurface( );
 290         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 291         pthread_mutex_unlock( &mlt_sdl_mutex );
 292         return result;
 293 }
 294
 295 static void sdl_unlock_display( )
 296 {
 297         pthread_mutex_lock( &mlt_sdl_mutex );
 298         SDL_Surface *screen = SDL_GetVideoSurface( );
 299         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 300                 SDL_UnlockSurface( screen );
 301         pthread_mutex_unlock( &mlt_sdl_mutex );
 302 }
 303
 304 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 305 {
 306         consumer_sdl this = udata;
 307
 308         // Get the volume
 309         double volume = mlt_properties_get_double( this->properties, "volume" );
 310
 311         pthread_mutex_lock( &this->audio_mutex );
 312
 313         // Block until audio received
 314         while ( this->running && len > this->audio_avail )
 315                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 316
 317         if ( this->audio_avail >= len )
 318         {
 319                 // Place in the audio buffer
 320                 if ( volume != 1.0 )
 321                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 322                 else
 323                         memcpy( stream, this->audio_buffer, len );
 324
 325                 // Remove len from the audio available
 326                 this->audio_avail -= len;
 327
 328                 // Remove the samples
 329                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 330         }
 331         else
 332         {
 333                 // Just to be safe, wipe the stream first
 334                 memset( stream, 0, len );
 335
 336                 // Mix the audio
 337                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 338
 339                 // No audio left
 340                 this->audio_avail = 0;
 341         }
 342
 343         // We're definitely playing now
 344         this->playing = 1;
 345
 346         pthread_cond_broadcast( &this->audio_cond );
 347         pthread_mutex_unlock( &this->audio_mutex );
 348 }
 349
 350 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 351 {
 352         // Get the properties of this consumer
 353         mlt_properties properties = this->properties;
 354         mlt_audio_format afmt = mlt_audio_s16;
 355
 356         // Set the preferred params of the test card signal
 357         int channels = mlt_properties_get_int( properties, "channels" );
 358         int frequency = mlt_properties_get_int( properties, "frequency" );
 359         static int counter = 0;
 360
 361         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 362
 363         int16_t *pcm;
 364         int bytes;
 365
 366         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 367         *duration = ( ( samples * 1000 ) / frequency );
 368
 369         if ( mlt_properties_get_int( properties, "audio_off" ) )
 370         {
 371                 this->playing = 1;
 372                 init_audio = 1;
 373                 return init_audio;
 374         }
 375
 376         if ( init_audio == 1 )
 377         {
 378                 SDL_AudioSpec request;
 379                 SDL_AudioSpec got;
 380
 381                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 382
 383                 // specify audio format
 384                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 385                 this->playing = 0;
 386                 request.freq = frequency;
 387                 request.format = AUDIO_S16SYS;
 388                 request.channels = channels;
 389                 request.samples = audio_buffer;
 390                 request.callback = sdl_fill_audio;
 391                 request.userdata = (void *)this;
 392                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 393                 {
 394                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 395                         init_audio = 2;
 396                 }
 397                 else if ( got.size != 0 )
 398                 {
 399                         SDL_PauseAudio( 0 );
 400                         init_audio = 0;
 401                 }
 402         }
 403
 404         if ( init_audio == 0 )
 405         {
 406                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 407                 bytes = ( samples * channels * 2 );
 408                 pthread_mutex_lock( &this->audio_mutex );
 409                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 410                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 411                 if ( this->running )
 412                 {
 413                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 414                                 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 415                         else
 416                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 417                         this->audio_avail += bytes;
 418                 }
 419                 pthread_cond_broadcast( &this->audio_cond );
 420                 pthread_mutex_unlock( &this->audio_mutex );
 421         }
 422         else
 423         {
 424                 this->playing = 1;
 425         }
 426
 427         return init_audio;
 428 }
 429
 430 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 431 {
 432         // Get the properties of this consumer
 433         mlt_properties properties = this->properties;
 434
 435         mlt_image_format vfmt = mlt_image_yuv422;
 436         int width = this->width, height = this->height;
 437         uint8_t *image;
 438         int changed = 0;
 439
 440         int video_off = mlt_properties_get_int( properties, "video_off" );
 441         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 442         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 443         int display_off = video_off | preview_off;
 444
 445         if ( this->running && display_off == 0 )
 446         {
 447                 // Get the image, width and height
 448                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 449                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 450                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 451
 452                 // Handle events
 453                 if ( this->sdl_screen != NULL )
 454                 {
 455                         SDL_Event event;
 456
 457                         sdl_lock_display( );
 458                         pthread_mutex_lock( &mlt_sdl_mutex );
 459                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 460                         pthread_mutex_unlock( &mlt_sdl_mutex );
 461                         sdl_unlock_display( );
 462
 463                         while ( SDL_PollEvent( &event ) )
 464                         {
 465                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 466
 467                                 switch( event.type )
 468                                 {
 469                                         case SDL_VIDEORESIZE:
 470                                                 this->window_width = event.resize.w;
 471                                                 this->window_height = event.resize.h;
 472                                                 changed = 1;
 473                                                 break;
 474                                         case SDL_QUIT:
 475                                                 this->running = 0;
 476                                                 break;
 477                                         case SDL_KEYDOWN:
 478                                                 {
 479                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 480                                                         char keyboard[ 2 ] = " ";
 481                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 482                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 483                                                         {
 484                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 485                                                                 callback( producer, keyboard );
 486                                                         }
 487                                                 }
 488                                                 break;
 489                                 }
 490                         }
 491                 }
 492
 493                 sdl_lock_display();
 494
 495                 if ( width != this->width || height != this->height )
 496                 {
 497                         if ( this->sdl_overlay != NULL )
 498                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 499                         this->sdl_overlay = NULL;
 500                 }
 501
 502                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 503                 {
 504                         // Force an overlay recreation
 505                         if ( this->sdl_overlay != NULL )
 506                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 507                         this->sdl_overlay = NULL;
 508
 509                         // open SDL window with video overlay, if possible
 510                         pthread_mutex_lock( &mlt_sdl_mutex );
 511                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 512                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 513                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 514                         pthread_mutex_unlock( &mlt_sdl_mutex );
 515
 516                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 517                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 518                         SDL_Flip( this->sdl_screen );
 519                 }
 520
 521                 if ( this->running )
 522                 {
 523                         // Determine window's new display aspect ratio
 524                         double this_aspect = ( double )this->window_width / this->window_height;
 525
 526                         // Get the display aspect ratio
 527                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 528
 529                         // Determine frame's display aspect ratio
 530                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 531
 532                         // Store the width and height received
 533                         this->width = width;
 534                         this->height = height;
 535
 536                         // If using hardware scaler
 537                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 538                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 539                         {
 540                                 // Use hardware scaler to normalise display aspect ratio
 541                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 542                                 this->rect.h = this->window_height;
 543                                 if ( this->rect.w > this->window_width )
 544                                 {
 545                                         this->rect.w = this->window_width;
 546                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 547                                 }
 548                         }
 549                         // Special case optimisation to negate odd effect of sample aspect ratio
 550                         // not corresponding exactly with image resolution.
 551                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 552                         {
 553                                 this->rect.w = this->window_width;
 554                                 this->rect.h = this->window_height;
 555                         }
 556                         // Use hardware scaler to normalise sample aspect ratio
 557                         else if ( this->window_height * display_ratio > this->window_width )
 558                         {
 559                                 this->rect.w = this->window_width;
 560                                 this->rect.h = this->window_width / display_ratio;
 561                         }
 562                         else
 563                         {
 564                                 this->rect.w = this->window_height * display_ratio;
 565                                 this->rect.h = this->window_height;
 566                         }
 567
 568                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 569                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 570                         this->rect.x -= this->rect.x % 2;
 571
 572                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 573                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 574                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 575                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 576
 577                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 578                 }
 579
 580                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 581                 {
 582                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 583                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 584                 }
 585
 586                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 587                 {
 588                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 589                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 590                         {
 591                                 if ( image != NULL )
 592                                         memcpy( this->buffer, image, width * height * 2 );
 593                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 594                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 595                         }
 596                 }
 597
 598                 sdl_unlock_display();
 599         }
 600         else if ( this->running )
 601         {
 602                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 603                 if ( !video_off )
 604                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 605                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 606                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 607         }
 608
 609         return 0;
 610 }
 611
 612 static void *video_thread( void *arg )
 613 {
 614         // Identify the arg
 615         consumer_sdl this = arg;
 616
 617         // Obtain time of thread start
 618         struct timeval now;
 619         int64_t start = 0;
 620         int64_t elapsed = 0;
 621         struct timespec tm;
 622         mlt_frame next = NULL;
 623         mlt_properties properties = NULL;
 624         double speed = 0;
 625
 626         // Get real time flag
 627         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 628
 629         // Get the current time
 630         gettimeofday( &now, NULL );
 631
 632         // Determine start time
 633         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 634
 635         while ( this->running )
 636         {
 637                 // Pop the next frame
 638                 pthread_mutex_lock( &this->video_mutex );
 639                 next = mlt_deque_pop_front( this->queue );
 640                 while ( next == NULL && this->running )
 641                 {
 642                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 643                         next = mlt_deque_pop_front( this->queue );
 644                 }
 645                 pthread_mutex_unlock( &this->video_mutex );
 646
 647                 if ( !this->running || next == NULL ) break;
 648
 649                 // Get the properties
 650                 properties =  MLT_FRAME_PROPERTIES( next );
 651
 652                 // Get the speed of the frame
 653                 speed = mlt_properties_get_double( properties, "_speed" );
 654
 655                 // Get the current time
 656                 gettimeofday( &now, NULL );
 657
 658                 // Get the elapsed time
 659                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 660
 661                 // See if we have to delay the display of the current frame
 662                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 663                 {
 664                         // Obtain the scheduled playout time
 665                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 666
 667                         // Determine the difference between the elapsed time and the scheduled playout time
 668                         int64_t difference = scheduled - elapsed;
 669
 670                         // Smooth playback a bit
 671                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 672                         {
 673                                 tm.tv_sec = difference / 1000000;
 674                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 675                                 nanosleep( &tm, NULL );
 676                         }
 677
 678                         // Show current frame if not too old
 679                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 680                                 consumer_play_video( this, next );
 681
 682                         // If the queue is empty, recalculate start to allow build up again
 683                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 684                         {
 685                                 gettimeofday( &now, NULL );
 686                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 687                         }
 688                 }
 689                 else
 690                 {
 691                         mlt_log_debug( MLT_CONSUMER_SERVICE(&this->parent), "dropped video frame\n" );
 692                 }
 693
 694                 // This frame can now be closed
 695                 mlt_frame_close( next );
 696                 next = NULL;
 697         }
 698
 699         if ( next != NULL )
 700                 mlt_frame_close( next );
 701
 702         mlt_consumer_stopped( &this->parent );
 703
 704         return NULL;
 705 }
 706
 707 /** Threaded wrapper for pipe.
 708 */
 709
 710 static void *consumer_thread( void *arg )
 711 {
 712         // Identify the arg
 713         consumer_sdl this = arg;
 714
 715         // Get the consumer
 716         mlt_consumer consumer = &this->parent;
 717
 718         // Convenience functionality
 719         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 720         int terminated = 0;
 721
 722         // Video thread
 723         pthread_t thread;
 724
 725         // internal intialization
 726         int init_audio = 1;
 727         int init_video = 1;
 728         mlt_frame frame = NULL;
 729         mlt_properties properties = NULL;
 730         int duration = 0;
 731         int64_t playtime = 0;
 732         struct timespec tm = { 0, 100000 };
 733
 734         // Loop until told not to
 735         while( !terminated && this->running )
 736         {
 737                 // Get a frame from the attached producer
 738                 frame = mlt_consumer_rt_frame( consumer );
 739
 740                 // Check for termination
 741                 if ( terminate_on_pause && frame != NULL )
 742                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 743
 744                 // Ensure that we have a frame
 745                 if ( frame != NULL )
 746                 {
 747                         // Get the frame properties
 748                         properties =  MLT_FRAME_PROPERTIES( frame );
 749
 750                         // Play audio
 751                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 752
 753                         // Determine the start time now
 754                         if ( this->playing && init_video )
 755                         {
 756                                 // Create the video thread
 757                                 pthread_create( &thread, NULL, video_thread, this );
 758
 759                                 // Video doesn't need to be initialised any more
 760                                 init_video = 0;
 761                         }
 762
 763                         // Set playtime for this frame
 764                         mlt_properties_set_int( properties, "playtime", playtime );
 765
 766                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 767                                 nanosleep( &tm, NULL );
 768
 769                         // Push this frame to the back of the queue
 770                         pthread_mutex_lock( &this->video_mutex );
 771                         mlt_deque_push_back( this->queue, frame );
 772                         pthread_cond_broadcast( &this->video_cond );
 773                         pthread_mutex_unlock( &this->video_mutex );
 774
 775                         // Calculate the next playtime
 776                         playtime += ( duration * 1000 );
 777                 }
 778         }
 779
 780         this->running = 0;
 781
 782         // Kill the video thread
 783         if ( init_video == 0 )
 784         {
 785                 pthread_mutex_lock( &this->video_mutex );
 786                 pthread_cond_broadcast( &this->video_cond );
 787                 pthread_mutex_unlock( &this->video_mutex );
 788                 pthread_join( thread, NULL );
 789         }
 790
 791         while( mlt_deque_count( this->queue ) )
 792                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 793
 794         this->sdl_screen = NULL;
 795         this->audio_avail = 0;
 796
 797         return NULL;
 798 }
 799
 800 static int consumer_get_dimensions( int *width, int *height )
 801 {
 802         int changed = 0;
 803
 804         // SDL windows manager structure
 805         SDL_SysWMinfo wm;
 806
 807         // Specify the SDL Version
 808         SDL_VERSION( &wm.version );
 809
 810         // Lock the display
 811         //sdl_lock_display();
 812
 813 #ifndef __DARWIN__
 814         // Get the wm structure
 815         if ( SDL_GetWMInfo( &wm ) == 1 )
 816         {
 817                 // Check that we have the X11 wm
 818                 if ( wm.subsystem == SDL_SYSWM_X11 )
 819                 {
 820                         // Get the SDL window
 821                         Window window = wm.info.x11.window;
 822
 823                         // Get the display session
 824                         Display *display = wm.info.x11.display;
 825
 826                         // Get the window attributes
 827                         XWindowAttributes attr;
 828                         XGetWindowAttributes( display, window, &attr );
 829
 830                         // Determine whether window has changed
 831                         changed = *width != attr.width || *height != attr.height;
 832
 833                         // Return width and height
 834                         *width = attr.width;
 835                         *height = attr.height;
 836                 }
 837         }
 838 #endif
 839
 840         // Unlock the display
 841         //sdl_unlock_display();
 842
 843         return changed;
 844 }
 845
 846 /** Callback to allow override of the close method.
 847 */
 848
 849 static void consumer_close( mlt_consumer parent )
 850 {
 851         // Get the actual object
 852         consumer_sdl this = parent->child;
 853         int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 854
 855         // Stop the consumer
 856         ///mlt_consumer_stop( parent );
 857
 858         // Now clean up the rest
 859         mlt_consumer_close( parent );
 860
 861         // Close the queue
 862         mlt_deque_close( this->queue );
 863
 864         // Destroy mutexes
 865         pthread_mutex_destroy( &this->audio_mutex );
 866         pthread_cond_destroy( &this->audio_cond );
 867
 868         if ( sdl_started == 0 )
 869         {
 870                 pthread_mutex_lock( &mlt_sdl_mutex );
 871                 SDL_Quit( );
 872                 pthread_mutex_unlock( &mlt_sdl_mutex );
 873         }
 874
 875         // Finally clean up this
 876         free( this );
 877 }