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                 else if ( display_off == 0 )
 199                 {
 200                         this->sdl_screen = SDL_GetVideoSurface( );
 201                 }
 202
 203                 if ( audio_off == 0 )
 204                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 205
 206                 // Default window size
 207                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 208                 this->window_width = ( double )this->height * display_ratio;
 209                 this->window_height = this->height;
 210
 211                 if ( this->sdl_screen == NULL && display_off == 0 )
 212                 {
 213                         if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
 214                         {
 215                                 const SDL_VideoInfo *vi = SDL_GetVideoInfo();
 216                                 this->window_width = vi->current_w;
 217                                 this->window_height = vi->current_h;
 218                                 this->sdl_flags |= SDL_FULLSCREEN;
 219                                 SDL_ShowCursor( SDL_DISABLE );
 220                         }
 221                         pthread_mutex_lock( &mlt_sdl_mutex );
 222                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 223                         pthread_mutex_unlock( &mlt_sdl_mutex );
 224                 }
 225
 226                 pthread_create( &this->thread, NULL, consumer_thread, this );
 227         }
 228
 229         return 0;
 230 }
 231
 232 int consumer_stop( mlt_consumer parent )
 233 {
 234         // Get the actual object
 235         consumer_sdl this = parent->child;
 236
 237         if ( this->joined == 0 )
 238         {
 239                 // Kill the thread and clean up
 240                 this->joined = 1;
 241                 this->running = 0;
 242                 if ( this->thread )
 243                         pthread_join( this->thread, NULL );
 244
 245                 // internal cleanup
 246                 if ( this->sdl_overlay != NULL )
 247                         SDL_FreeYUVOverlay( this->sdl_overlay );
 248                 this->sdl_overlay = NULL;
 249
 250                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 251                 {
 252                         pthread_mutex_lock( &this->audio_mutex );
 253                         pthread_cond_broadcast( &this->audio_cond );
 254                         pthread_mutex_unlock( &this->audio_mutex );
 255                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 256                 }
 257
 258                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 259                 {
 260                         pthread_mutex_lock( &mlt_sdl_mutex );
 261                         SDL_Quit( );
 262                         pthread_mutex_unlock( &mlt_sdl_mutex );
 263                 }
 264
 265                 this->sdl_screen = NULL;
 266         }
 267
 268         return 0;
 269 }
 270
 271 int consumer_is_stopped( mlt_consumer parent )
 272 {
 273         consumer_sdl this = parent->child;
 274         return !this->running;
 275 }
 276
 277 static int sdl_lock_display( )
 278 {
 279         pthread_mutex_lock( &mlt_sdl_mutex );
 280         SDL_Surface *screen = SDL_GetVideoSurface( );
 281         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 282         pthread_mutex_unlock( &mlt_sdl_mutex );
 283         return result;
 284 }
 285
 286 static void sdl_unlock_display( )
 287 {
 288         pthread_mutex_lock( &mlt_sdl_mutex );
 289         SDL_Surface *screen = SDL_GetVideoSurface( );
 290         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 291                 SDL_UnlockSurface( screen );
 292         pthread_mutex_unlock( &mlt_sdl_mutex );
 293 }
 294
 295 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 296 {
 297         consumer_sdl this = udata;
 298
 299         // Get the volume
 300         double volume = mlt_properties_get_double( this->properties, "volume" );
 301
 302         pthread_mutex_lock( &this->audio_mutex );
 303
 304         // Block until audio received
 305         while ( this->running && len > this->audio_avail )
 306                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 307
 308         if ( this->audio_avail >= len )
 309         {
 310                 // Place in the audio buffer
 311                 if ( volume != 1.0 )
 312                         SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 313                 else
 314                         memcpy( stream, this->audio_buffer, len );
 315
 316                 // Remove len from the audio available
 317                 this->audio_avail -= len;
 318
 319                 // Remove the samples
 320                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 321         }
 322         else
 323         {
 324                 // Just to be safe, wipe the stream first
 325                 memset( stream, 0, len );
 326
 327                 // Mix the audio
 328                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 329
 330                 // No audio left
 331                 this->audio_avail = 0;
 332         }
 333
 334         // We're definitely playing now
 335         this->playing = 1;
 336
 337         pthread_cond_broadcast( &this->audio_cond );
 338         pthread_mutex_unlock( &this->audio_mutex );
 339 }
 340
 341 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 342 {
 343         // Get the properties of this consumer
 344         mlt_properties properties = this->properties;
 345         mlt_audio_format afmt = mlt_audio_s16;
 346
 347         // Set the preferred params of the test card signal
 348         int channels = mlt_properties_get_int( properties, "channels" );
 349         int dest_channels = channels;
 350         int frequency = mlt_properties_get_int( properties, "frequency" );
 351         static int counter = 0;
 352
 353         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 354
 355         int16_t *pcm;
 356         int bytes;
 357
 358         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 359         *duration = ( ( samples * 1000 ) / frequency );
 360         pcm += mlt_properties_get_int( properties, "audio_offset" );
 361
 362         if ( mlt_properties_get_int( properties, "audio_off" ) )
 363         {
 364                 this->playing = 1;
 365                 init_audio = 1;
 366                 return init_audio;
 367         }
 368
 369         if ( init_audio == 1 )
 370         {
 371                 SDL_AudioSpec request;
 372                 SDL_AudioSpec got;
 373
 374                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 375
 376                 // specify audio format
 377                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 378                 this->playing = 0;
 379                 request.freq = frequency;
 380                 request.format = AUDIO_S16SYS;
 381                 request.channels = dest_channels;
 382                 request.samples = audio_buffer;
 383                 request.callback = sdl_fill_audio;
 384                 request.userdata = (void *)this;
 385                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 386                 {
 387                         mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
 388                         init_audio = 2;
 389                 }
 390                 else if ( got.size != 0 )
 391                 {
 392                         SDL_PauseAudio( 0 );
 393                         init_audio = 0;
 394                 }
 395         }
 396
 397         if ( init_audio == 0 )
 398         {
 399                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 400
 401                 bytes = samples * dest_channels * sizeof(*pcm);
 402                 pthread_mutex_lock( &this->audio_mutex );
 403                 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 404                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 405                 if ( this->running )
 406                 {
 407                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 408                         {
 409                                 if ( channels == dest_channels )
 410                                 {
 411                                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 412                                 }
 413                                 else
 414                                 {
 415                                         int16_t *dest = (int16_t*) &this->audio_buffer[ this->audio_avail ];
 416                                         int i = samples + 1;
 417
 418                                         while ( --i )
 419                                         {
 420                                                 memcpy( dest, pcm, dest_channels * sizeof(*pcm) );
 421                                                 pcm += channels;
 422                                                 dest += dest_channels;
 423                                         }
 424                                 }
 425                         }
 426                         else
 427                         {
 428                                 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 429                         }
 430                         this->audio_avail += bytes;
 431                 }
 432                 pthread_cond_broadcast( &this->audio_cond );
 433                 pthread_mutex_unlock( &this->audio_mutex );
 434         }
 435         else
 436         {
 437                 this->playing = 1;
 438         }
 439
 440         return init_audio;
 441 }
 442
 443 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 444 {
 445         // Get the properties of this consumer
 446         mlt_properties properties = this->properties;
 447
 448         mlt_image_format vfmt = mlt_image_yuv422;
 449         int width = this->width, height = this->height;
 450         uint8_t *image;
 451         int changed = 0;
 452
 453         int video_off = mlt_properties_get_int( properties, "video_off" );
 454         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 455         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 456         int display_off = video_off | preview_off;
 457
 458         if ( this->running && display_off == 0 )
 459         {
 460                 // Get the image, width and height
 461                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 462                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 463                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 464
 465                 // Handle events
 466                 if ( this->sdl_screen != NULL )
 467                 {
 468                         SDL_Event event;
 469
 470                         sdl_lock_display( );
 471                         pthread_mutex_lock( &mlt_sdl_mutex );
 472                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 473                         pthread_mutex_unlock( &mlt_sdl_mutex );
 474                         sdl_unlock_display( );
 475
 476                         while ( SDL_PollEvent( &event ) )
 477                         {
 478                                 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 479
 480                                 switch( event.type )
 481                                 {
 482                                         case SDL_VIDEORESIZE:
 483                                                 this->window_width = event.resize.w;
 484                                                 this->window_height = event.resize.h;
 485                                                 changed = 1;
 486                                                 break;
 487                                         case SDL_QUIT:
 488                                                 this->running = 0;
 489                                                 break;
 490                                         case SDL_KEYDOWN:
 491                                                 {
 492                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 493                                                         char keyboard[ 2 ] = " ";
 494                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 495                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 496                                                         {
 497                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 498                                                                 callback( producer, keyboard );
 499                                                         }
 500                                                 }
 501                                                 break;
 502                                 }
 503                         }
 504                 }
 505
 506                 sdl_lock_display();
 507
 508                 if ( width != this->width || height != this->height )
 509                 {
 510                         if ( this->sdl_overlay != NULL )
 511                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 512                         this->sdl_overlay = NULL;
 513                 }
 514
 515                 if ( this->running && ( this->sdl_screen == NULL || changed ) )
 516                 {
 517                         // Force an overlay recreation
 518                         if ( this->sdl_overlay != NULL )
 519                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 520                         this->sdl_overlay = NULL;
 521
 522                         // open SDL window with video overlay, if possible
 523                         pthread_mutex_lock( &mlt_sdl_mutex );
 524                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 525                         if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 526                                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
 527                         pthread_mutex_unlock( &mlt_sdl_mutex );
 528
 529                         uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 530                         SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 531                         SDL_Flip( this->sdl_screen );
 532                 }
 533
 534                 if ( this->running )
 535                 {
 536                         // Determine window's new display aspect ratio
 537                         double this_aspect = ( double )this->window_width / this->window_height;
 538
 539                         // Get the display aspect ratio
 540                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 541
 542                         // Determine frame's display aspect ratio
 543                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 544
 545                         // Store the width and height received
 546                         this->width = width;
 547                         this->height = height;
 548
 549                         // If using hardware scaler
 550                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 551                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 552                         {
 553                                 // Use hardware scaler to normalise display aspect ratio
 554                                 this->rect.w = frame_aspect / this_aspect * this->window_width;
 555                                 this->rect.h = this->window_height;
 556                                 if ( this->rect.w > this->window_width )
 557                                 {
 558                                         this->rect.w = this->window_width;
 559                                         this->rect.h = this_aspect / frame_aspect * this->window_height;
 560                                 }
 561                         }
 562                         // Special case optimisation to negate odd effect of sample aspect ratio
 563                         // not corresponding exactly with image resolution.
 564                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 565                         {
 566                                 this->rect.w = this->window_width;
 567                                 this->rect.h = this->window_height;
 568                         }
 569                         // Use hardware scaler to normalise sample aspect ratio
 570                         else if ( this->window_height * display_ratio > this->window_width )
 571                         {
 572                                 this->rect.w = this->window_width;
 573                                 this->rect.h = this->window_width / display_ratio;
 574                         }
 575                         else
 576                         {
 577                                 this->rect.w = this->window_height * display_ratio;
 578                                 this->rect.h = this->window_height;
 579                         }
 580
 581                         this->rect.x = ( this->window_width - this->rect.w ) / 2;
 582                         this->rect.y = ( this->window_height - this->rect.h ) / 2;
 583                         this->rect.x -= this->rect.x % 2;
 584
 585                         mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 586                         mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 587                         mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 588                         mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 589
 590                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 591                 }
 592
 593                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
 594                 {
 595                         SDL_SetClipRect( this->sdl_screen, &this->rect );
 596                         this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
 597                 }
 598
 599                 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
 600                 {
 601                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 602                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 603                         {
 604                                 if ( image != NULL )
 605                                         memcpy( this->buffer, image, width * height * 2 );
 606                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 607                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 608                         }
 609                 }
 610
 611                 sdl_unlock_display();
 612         }
 613         else if ( this->running )
 614         {
 615                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 616                 if ( !video_off )
 617                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 618                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 619                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 620         }
 621
 622         return 0;
 623 }
 624
 625 static void *video_thread( void *arg )
 626 {
 627         // Identify the arg
 628         consumer_sdl this = arg;
 629
 630         // Obtain time of thread start
 631         struct timeval now;
 632         int64_t start = 0;
 633         int64_t elapsed = 0;
 634         struct timespec tm;
 635         mlt_frame next = NULL;
 636         mlt_properties properties = NULL;
 637         double speed = 0;
 638
 639         // Get real time flag
 640         int real_time = mlt_properties_get_int( this->properties, "real_time" );
 641
 642         // Get the current time
 643         gettimeofday( &now, NULL );
 644
 645         // Determine start time
 646         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 647
 648         while ( this->running )
 649         {
 650                 // Pop the next frame
 651                 pthread_mutex_lock( &this->video_mutex );
 652                 next = mlt_deque_pop_front( this->queue );
 653                 while ( next == NULL && this->running )
 654                 {
 655                         pthread_cond_wait( &this->video_cond, &this->video_mutex );
 656                         next = mlt_deque_pop_front( this->queue );
 657                 }
 658                 pthread_mutex_unlock( &this->video_mutex );
 659
 660                 if ( !this->running || next == NULL ) break;
 661
 662                 // Get the properties
 663                 properties =  MLT_FRAME_PROPERTIES( next );
 664
 665                 // Get the speed of the frame
 666                 speed = mlt_properties_get_double( properties, "_speed" );
 667
 668                 // Get the current time
 669                 gettimeofday( &now, NULL );
 670
 671                 // Get the elapsed time
 672                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 673
 674                 // See if we have to delay the display of the current frame
 675                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
 676                 {
 677                         // Obtain the scheduled playout time
 678                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 679
 680                         // Determine the difference between the elapsed time and the scheduled playout time
 681                         int64_t difference = scheduled - elapsed;
 682
 683                         // Smooth playback a bit
 684                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 685                         {
 686                                 tm.tv_sec = difference / 1000000;
 687                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 688                                 nanosleep( &tm, NULL );
 689                         }
 690
 691                         // Show current frame if not too old
 692                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
 693                                 consumer_play_video( this, next );
 694
 695                         // If the queue is empty, recalculate start to allow build up again
 696                         if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
 697                         {
 698                                 gettimeofday( &now, NULL );
 699                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 700                         }
 701                 }
 702                 else
 703                 {
 704                         mlt_log_debug( MLT_CONSUMER_SERVICE(&this->parent), "dropped video frame\n" );
 705                 }
 706
 707                 // This frame can now be closed
 708                 mlt_frame_close( next );
 709                 next = NULL;
 710         }
 711
 712         if ( next != NULL )
 713                 mlt_frame_close( next );
 714
 715         mlt_consumer_stopped( &this->parent );
 716
 717         return NULL;
 718 }
 719
 720 /** Threaded wrapper for pipe.
 721 */
 722
 723 static void *consumer_thread( void *arg )
 724 {
 725         // Identify the arg
 726         consumer_sdl this = arg;
 727
 728         // Get the consumer
 729         mlt_consumer consumer = &this->parent;
 730
 731         // Convenience functionality
 732         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 733         int terminated = 0;
 734
 735         // Video thread
 736         pthread_t thread;
 737
 738         // internal intialization
 739         int init_audio = 1;
 740         int init_video = 1;
 741         mlt_frame frame = NULL;
 742         mlt_properties properties = NULL;
 743         int duration = 0;
 744         int64_t playtime = 0;
 745         struct timespec tm = { 0, 100000 };
 746
 747         // Loop until told not to
 748         while( !terminated && this->running )
 749         {
 750                 // Get a frame from the attached producer
 751                 frame = mlt_consumer_rt_frame( consumer );
 752
 753                 // Check for termination
 754                 if ( terminate_on_pause && frame != NULL )
 755                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 756
 757                 // Ensure that we have a frame
 758                 if ( frame != NULL )
 759                 {
 760                         // Get the frame properties
 761                         properties =  MLT_FRAME_PROPERTIES( frame );
 762
 763                         // Play audio
 764                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 765
 766                         // Determine the start time now
 767                         if ( this->playing && init_video )
 768                         {
 769                                 // Create the video thread
 770                                 pthread_create( &thread, NULL, video_thread, this );
 771
 772                                 // Video doesn't need to be initialised any more
 773                                 init_video = 0;
 774                         }
 775
 776                         // Set playtime for this frame
 777                         mlt_properties_set_int( properties, "playtime", playtime );
 778
 779                         while ( this->running && mlt_deque_count( this->queue ) > 15 )
 780                                 nanosleep( &tm, NULL );
 781
 782                         // Push this frame to the back of the queue
 783                         pthread_mutex_lock( &this->video_mutex );
 784                         mlt_deque_push_back( this->queue, frame );
 785                         pthread_cond_broadcast( &this->video_cond );
 786                         pthread_mutex_unlock( &this->video_mutex );
 787
 788                         // Calculate the next playtime
 789                         playtime += ( duration * 1000 );
 790                 }
 791         }
 792
 793         this->running = 0;
 794
 795         // Kill the video thread
 796         if ( init_video == 0 )
 797         {
 798                 pthread_mutex_lock( &this->video_mutex );
 799                 pthread_cond_broadcast( &this->video_cond );
 800                 pthread_mutex_unlock( &this->video_mutex );
 801                 pthread_join( thread, NULL );
 802         }
 803
 804         while( mlt_deque_count( this->queue ) )
 805                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 806
 807         this->sdl_screen = NULL;
 808         this->audio_avail = 0;
 809
 810         return NULL;
 811 }
 812
 813 static int consumer_get_dimensions( int *width, int *height )
 814 {
 815         int changed = 0;
 816
 817         // SDL windows manager structure
 818         SDL_SysWMinfo wm;
 819
 820         // Specify the SDL Version
 821         SDL_VERSION( &wm.version );
 822
 823         // Lock the display
 824         //sdl_lock_display();
 825
 826 #ifndef __DARWIN__
 827         // Get the wm structure
 828         if ( SDL_GetWMInfo( &wm ) == 1 )
 829         {
 830                 // Check that we have the X11 wm
 831                 if ( wm.subsystem == SDL_SYSWM_X11 )
 832                 {
 833                         // Get the SDL window
 834                         Window window = wm.info.x11.window;
 835
 836                         // Get the display session
 837                         Display *display = wm.info.x11.display;
 838
 839                         // Get the window attributes
 840                         XWindowAttributes attr;
 841                         XGetWindowAttributes( display, window, &attr );
 842
 843                         // Determine whether window has changed
 844                         changed = *width != attr.width || *height != attr.height;
 845
 846                         // Return width and height
 847                         *width = attr.width;
 848                         *height = attr.height;
 849                 }
 850         }
 851 #endif
 852
 853         // Unlock the display
 854         //sdl_unlock_display();
 855
 856         return changed;
 857 }
 858
 859 /** Callback to allow override of the close method.
 860 */
 861
 862 static void consumer_close( mlt_consumer parent )
 863 {
 864         // Get the actual object
 865         consumer_sdl this = parent->child;
 866
 867         // Stop the consumer
 868         ///mlt_consumer_stop( parent );
 869
 870         // Now clean up the rest
 871         mlt_consumer_close( parent );
 872
 873         // Close the queue
 874         mlt_deque_close( this->queue );
 875
 876         // Destroy mutexes
 877         pthread_mutex_destroy( &this->audio_mutex );
 878         pthread_cond_destroy( &this->audio_cond );
 879
 880         // Finally clean up this
 881         free( this );
 882 }