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 dest_channels = channels;
 359         int frequency = mlt_properties_get_int( properties, "frequency" );
 360         static int counter = 0;
 361
 362         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 363
 364         int16_t *pcm;
 365         int bytes;
 366
 367         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 368         *duration = ( ( samples * 1000 ) / frequency );
 369         pcm += mlt_properties_get_int( properties, "audio_offset" );
 370
 371         if ( mlt_properties_get_int( properties, "audio_off" ) )
 372         {
 373                 this->playing = 1;
 374                 init_audio = 1;
 375                 return init_audio;
 376         }
 377
 378         if ( init_audio == 1 )
 379         {
 380                 SDL_AudioSpec request;
 381                 SDL_AudioSpec got;
 382
 383                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 384
 385                 // specify audio format
 386                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 387                 this->playing = 0;
 388                 request.freq = frequency;
 389                 request.format = AUDIO_S16SYS;
 390                 request.channels = dest_channels;
 391                 request.samples = audio_buffer;
 392                 request.callback = sdl_fill_audio;
 393                 request.userdata = (void *)this;
 394                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 395                 {
 396                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 397                         init_audio = 2;
 398                 }
 399                 else if ( got.size != 0 )
 400                 {
 401                         SDL_PauseAudio( 0 );
 402                         init_audio = 0;
 403                 }
 404         }
 405
 406         if ( init_audio == 0 )
 407         {
 408                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 409
 410                 bytes = samples * dest_channels * sizeof(*pcm);
 411                 pthread_mutex_lock( &this->audio_mutex );
 412                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 413                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 414                 if ( this->running )
 415                 {
 416                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 417                         {
 418                                 if ( channels == dest_channels )
 419                                 {
 420                                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 421                                 }
 422                                 else
 423                                 {
 424                                         int16_t *dest = (int16_t*) &this->audio_buffer[ this->audio_avail ];
 425                                         int i = samples + 1;
 426
 427                                         while ( --i )
 428                                         {
 429                                                 memcpy( dest, pcm, dest_channels * sizeof(*pcm) );
 430                                                 pcm += channels;
 431                                                 dest += dest_channels;
 432                                         }
 433                                 }
 434                         }
 435                         else
 436                         {
 437                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 438                         }
 439                         this->audio_avail += bytes;
 440                 }
 441                 pthread_cond_broadcast( &this->audio_cond );
 442                 pthread_mutex_unlock( &this->audio_mutex );
 443         }
 444         else
 445         {
 446                 this->playing = 1;
 447         }
 448
 449         return init_audio;
 450 }
 451
 452 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 453 {
 454         // Get the properties of this consumer
 455         mlt_properties properties = this->properties;
 456
 457         mlt_image_format vfmt = mlt_image_yuv422;
 458         int width = this->width, height = this->height;
 459         uint8_t *image;
 460         int changed = 0;
 461
 462         int video_off = mlt_properties_get_int( properties, "video_off" );
 463         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 464         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 465         int display_off = video_off | preview_off;
 466
 467         if ( this->running && display_off == 0 )
 468         {
 469                 // Get the image, width and height
 470                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 471                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 472                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 473
 474                 // Handle events
 475                 if ( this->sdl_screen != NULL )
 476                 {
 477                         SDL_Event event;
 478
 479                         sdl_lock_display( );
 480                         pthread_mutex_lock( &mlt_sdl_mutex );
 481                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 482                         pthread_mutex_unlock( &mlt_sdl_mutex );
 483                         sdl_unlock_display( );
 484
 485                         while ( SDL_PollEvent( &event ) )
 486                         {
 487                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 488
 489                                 switch( event.type )
 490                                 {
 491                                         case SDL_VIDEORESIZE:
 492                                                 this->window_width = event.resize.w;
 493                                                 this->window_height = event.resize.h;
 494                                                 changed = 1;
 495                                                 break;
 496                                         case SDL_QUIT:
 497                                                 this->running = 0;
 498                                                 break;
 499                                         case SDL_KEYDOWN:
 500                                                 {
 501                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 502                                                         char keyboard[ 2 ] = " ";
 503                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 504                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 505                                                         {
 506                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 507                                                                 callback( producer, keyboard );
 508                                                         }
 509                                                 }
 510                                                 break;
 511                                 }
 512                         }
 513                 }
 514
 515                 sdl_lock_display();
 516
 517                 if ( width != this->width || height != this->height )
 518                 {
 519                         if ( this->sdl_overlay != NULL )
 520                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 521                         this->sdl_overlay = NULL;
 522                 }
 523
 524                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 525                 {
 526                         // Force an overlay recreation
 527                         if ( this->sdl_overlay != NULL )
 528                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 529                         this->sdl_overlay = NULL;
 530
 531                         // open SDL window with video overlay, if possible
 532                         pthread_mutex_lock( &mlt_sdl_mutex );
 533                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 534                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 535                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 536                         pthread_mutex_unlock( &mlt_sdl_mutex );
 537
 538                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 539                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 540                         SDL_Flip( this->sdl_screen );
 541                 }
 542
 543                 if ( this->running )
 544                 {
 545                         // Determine window's new display aspect ratio
 546                         double this_aspect = ( double )this->window_width / this->window_height;
 547
 548                         // Get the display aspect ratio
 549                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 550
 551                         // Determine frame's display aspect ratio
 552                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 553
 554                         // Store the width and height received
 555                         this->width = width;
 556                         this->height = height;
 557
 558                         // If using hardware scaler
 559                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 560                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 561                         {
 562                                 // Use hardware scaler to normalise display aspect ratio
 563                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 564                                 this->rect.h = this->window_height;
 565                                 if ( this->rect.w > this->window_width )
 566                                 {
 567                                         this->rect.w = this->window_width;
 568                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 569                                 }
 570                         }
 571                         // Special case optimisation to negate odd effect of sample aspect ratio
 572                         // not corresponding exactly with image resolution.
 573                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 574                         {
 575                                 this->rect.w = this->window_width;
 576                                 this->rect.h = this->window_height;
 577                         }
 578                         // Use hardware scaler to normalise sample aspect ratio
 579                         else if ( this->window_height * display_ratio > this->window_width )
 580                         {
 581                                 this->rect.w = this->window_width;
 582                                 this->rect.h = this->window_width / display_ratio;
 583                         }
 584                         else
 585                         {
 586                                 this->rect.w = this->window_height * display_ratio;
 587                                 this->rect.h = this->window_height;
 588                         }
 589
 590                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 591                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 592                         this->rect.x -= this->rect.x % 2;
 593
 594                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 595                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 596                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 597                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 598
 599                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 600                 }
 601
 602                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 603                 {
 604                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 605                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 606                 }
 607
 608                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 609                 {
 610                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 611                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 612                         {
 613                                 if ( image != NULL )
 614                                         memcpy( this->buffer, image, width * height * 2 );
 615                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 616                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 617                         }
 618                 }
 619
 620                 sdl_unlock_display();
 621         }
 622         else if ( this->running )
 623         {
 624                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 625                 if ( !video_off )
 626                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 627                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 628                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 629         }
 630
 631         return 0;
 632 }
 633
 634 static void *video_thread( void *arg )
 635 {
 636         // Identify the arg
 637         consumer_sdl this = arg;
 638
 639         // Obtain time of thread start
 640         struct timeval now;
 641         int64_t start = 0;
 642         int64_t elapsed = 0;
 643         struct timespec tm;
 644         mlt_frame next = NULL;
 645         mlt_properties properties = NULL;
 646         double speed = 0;
 647
 648         // Get real time flag
 649         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 650
 651         // Get the current time
 652         gettimeofday( &now, NULL );
 653
 654         // Determine start time
 655         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 656
 657         while ( this->running )
 658         {
 659                 // Pop the next frame
 660                 pthread_mutex_lock( &this->video_mutex );
 661                 next = mlt_deque_pop_front( this->queue );
 662                 while ( next == NULL && this->running )
 663                 {
 664                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 665                         next = mlt_deque_pop_front( this->queue );
 666                 }
 667                 pthread_mutex_unlock( &this->video_mutex );
 668
 669                 if ( !this->running || next == NULL ) break;
 670
 671                 // Get the properties
 672                 properties =  MLT_FRAME_PROPERTIES( next );
 673
 674                 // Get the speed of the frame
 675                 speed = mlt_properties_get_double( properties, "_speed" );
 676
 677                 // Get the current time
 678                 gettimeofday( &now, NULL );
 679
 680                 // Get the elapsed time
 681                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 682
 683                 // See if we have to delay the display of the current frame
 684                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 685                 {
 686                         // Obtain the scheduled playout time
 687                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 688
 689                         // Determine the difference between the elapsed time and the scheduled playout time
 690                         int64_t difference = scheduled - elapsed;
 691
 692                         // Smooth playback a bit
 693                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 694                         {
 695                                 tm.tv_sec = difference / 1000000;
 696                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 697                                 nanosleep( &tm, NULL );
 698                         }
 699
 700                         // Show current frame if not too old
 701                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 702                                 consumer_play_video( this, next );
 703
 704                         // If the queue is empty, recalculate start to allow build up again
 705                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 706                         {
 707                                 gettimeofday( &now, NULL );
 708                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 709                         }
 710                 }
 711                 else
 712                 {
 713                         mlt_log_debug( MLT_CONSUMER_SERVICE(&this->parent), "dropped video frame\n" );
 714                 }
 715
 716                 // This frame can now be closed
 717                 mlt_frame_close( next );
 718                 next = NULL;
 719         }
 720
 721         if ( next != NULL )
 722                 mlt_frame_close( next );
 723
 724         mlt_consumer_stopped( &this->parent );
 725
 726         return NULL;
 727 }
 728
 729 /** Threaded wrapper for pipe.
 730 */
 731
 732 static void *consumer_thread( void *arg )
 733 {
 734         // Identify the arg
 735         consumer_sdl this = arg;
 736
 737         // Get the consumer
 738         mlt_consumer consumer = &this->parent;
 739
 740         // Convenience functionality
 741         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 742         int terminated = 0;
 743
 744         // Video thread
 745         pthread_t thread;
 746
 747         // internal intialization
 748         int init_audio = 1;
 749         int init_video = 1;
 750         mlt_frame frame = NULL;
 751         mlt_properties properties = NULL;
 752         int duration = 0;
 753         int64_t playtime = 0;
 754         struct timespec tm = { 0, 100000 };
 755
 756         // Loop until told not to
 757         while( !terminated && this->running )
 758         {
 759                 // Get a frame from the attached producer
 760                 frame = mlt_consumer_rt_frame( consumer );
 761
 762                 // Check for termination
 763                 if ( terminate_on_pause && frame != NULL )
 764                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 765
 766                 // Ensure that we have a frame
 767                 if ( frame != NULL )
 768                 {
 769                         // Get the frame properties
 770                         properties =  MLT_FRAME_PROPERTIES( frame );
 771
 772                         // Play audio
 773                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 774
 775                         // Determine the start time now
 776                         if ( this->playing && init_video )
 777                         {
 778                                 // Create the video thread
 779                                 pthread_create( &thread, NULL, video_thread, this );
 780
 781                                 // Video doesn't need to be initialised any more
 782                                 init_video = 0;
 783                         }
 784
 785                         // Set playtime for this frame
 786                         mlt_properties_set_int( properties, "playtime", playtime );
 787
 788                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 789                                 nanosleep( &tm, NULL );
 790
 791                         // Push this frame to the back of the queue
 792                         pthread_mutex_lock( &this->video_mutex );
 793                         mlt_deque_push_back( this->queue, frame );
 794                         pthread_cond_broadcast( &this->video_cond );
 795                         pthread_mutex_unlock( &this->video_mutex );
 796
 797                         // Calculate the next playtime
 798                         playtime += ( duration * 1000 );
 799                 }
 800         }
 801
 802         this->running = 0;
 803
 804         // Kill the video thread
 805         if ( init_video == 0 )
 806         {
 807                 pthread_mutex_lock( &this->video_mutex );
 808                 pthread_cond_broadcast( &this->video_cond );
 809                 pthread_mutex_unlock( &this->video_mutex );
 810                 pthread_join( thread, NULL );
 811         }
 812
 813         while( mlt_deque_count( this->queue ) )
 814                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 815
 816         this->sdl_screen = NULL;
 817         this->audio_avail = 0;
 818
 819         return NULL;
 820 }
 821
 822 static int consumer_get_dimensions( int *width, int *height )
 823 {
 824         int changed = 0;
 825
 826         // SDL windows manager structure
 827         SDL_SysWMinfo wm;
 828
 829         // Specify the SDL Version
 830         SDL_VERSION( &wm.version );
 831
 832         // Lock the display
 833         //sdl_lock_display();
 834
 835 #ifndef __DARWIN__
 836         // Get the wm structure
 837         if ( SDL_GetWMInfo( &wm ) == 1 )
 838         {
 839                 // Check that we have the X11 wm
 840                 if ( wm.subsystem == SDL_SYSWM_X11 )
 841                 {
 842                         // Get the SDL window
 843                         Window window = wm.info.x11.window;
 844
 845                         // Get the display session
 846                         Display *display = wm.info.x11.display;
 847
 848                         // Get the window attributes
 849                         XWindowAttributes attr;
 850                         XGetWindowAttributes( display, window, &attr );
 851
 852                         // Determine whether window has changed
 853                         changed = *width != attr.width || *height != attr.height;
 854
 855                         // Return width and height
 856                         *width = attr.width;
 857                         *height = attr.height;
 858                 }
 859         }
 860 #endif
 861
 862         // Unlock the display
 863         //sdl_unlock_display();
 864
 865         return changed;
 866 }
 867
 868 /** Callback to allow override of the close method.
 869 */
 870
 871 static void consumer_close( mlt_consumer parent )
 872 {
 873         // Get the actual object
 874         consumer_sdl this = parent->child;
 875         int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 876
 877         // Stop the consumer
 878         ///mlt_consumer_stop( parent );
 879
 880         // Now clean up the rest
 881         mlt_consumer_close( parent );
 882
 883         // Close the queue
 884         mlt_deque_close( this->queue );
 885
 886         // Destroy mutexes
 887         pthread_mutex_destroy( &this->audio_mutex );
 888         pthread_cond_destroy( &this->audio_cond );
 889
 890         if ( sdl_started == 0 )
 891         {
 892                 pthread_mutex_lock( &mlt_sdl_mutex );
 893                 SDL_Quit( );
 894                 pthread_mutex_unlock( &mlt_sdl_mutex );
 895         }
 896
 897         // Finally clean up this
 898         free( this );
 899 }