git.sesse.net Git - mlt/blob - src/modules/sdl/consumer_sdl_still.c

   1 /*
   2  * consumer_sdl_still.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "consumer_sdl.h"
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <framework/mlt_factory.h>
  25 #include <framework/mlt_filter.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <pthread.h>
  30 #include <SDL/SDL.h>
  31 #include <SDL/SDL_syswm.h>
  32 #include <sys/time.h>
  33
  34 /** This classes definition.
  35 */
  36
  37 typedef struct consumer_sdl_s *consumer_sdl;
  38
  39 struct consumer_sdl_s
  40 {
  41         struct mlt_consumer_s parent;
  42         mlt_properties properties;
  43         pthread_t thread;
  44         int joined;
  45         int running;
  46         int window_width;
  47         int window_height;
  48         float aspect_ratio;
  49         float display_aspect;
  50         double last_frame_aspect;
  51         int width;
  52         int height;
  53         int playing;
  54         int sdl_flags;
  55         SDL_Surface *sdl_screen;
  56         SDL_Rect rect;
  57         uint8_t *buffer;
  58         int last_position;
  59         mlt_producer last_producer;
  60         int filtered;
  61 };
  62
  63 /** Forward references to static functions.
  64 */
  65
  66 static int consumer_start( mlt_consumer parent );
  67 static int consumer_stop( mlt_consumer parent );
  68 static int consumer_is_stopped( mlt_consumer parent );
  69 static void consumer_close( mlt_consumer parent );
  70 static void *consumer_thread( void * );
  71 static int consumer_get_dimensions( int *width, int *height );
  72 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  73
  74 /** This is what will be called by the factory - anything can be passed in
  75         via the argument, but keep it simple.
  76 */
  77
  78 mlt_consumer consumer_sdl_still_init( char *arg )
  79 {
  80         // Create the consumer object
  81         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  82
  83         // If no malloc'd and consumer init ok
  84         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  85         {
  86                 // Get the parent consumer object
  87                 mlt_consumer parent = &this->parent;
  88
  89                 // We have stuff to clean up, so override the close method
  90                 parent->close = consumer_close;
  91
  92                 // get a handle on properties
  93                 mlt_service service = mlt_consumer_service( parent );
  94                 this->properties = mlt_service_properties( service );
  95
  96                 // Default scaler (for now we'll use nearest)
  97                 mlt_properties_set( this->properties, "rescale", "nearest" );
  98
  99                 // We're always going to run this in non-realtime mode
 100                 mlt_properties_set( this->properties, "real_time", "0" );
 101
 102                 // Default progressive true
 103                 mlt_properties_set_int( this->properties, "progressive", 1 );
 104
 105                 // Get sample aspect ratio
 106                 this->aspect_ratio = mlt_properties_get_double( this->properties, "aspect_ratio" );
 107
 108                 // Ensure we don't join on a non-running object
 109                 this->joined = 1;
 110
 111                 // Default display aspect ratio
 112                 this->display_aspect = 4.0 / 3.0;
 113
 114                 // process actual param
 115                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 116                 {
 117                         this->width = mlt_properties_get_int( this->properties, "width" );
 118                         this->height = mlt_properties_get_int( this->properties, "height" );
 119                 }
 120
 121                 // Default window size
 122                 this->window_width = ( float )this->height * this->display_aspect;
 123                 this->window_height = this->height;
 124
 125                 // Set the sdl flags
 126                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 127
 128                 // Allow thread to be started/stopped
 129                 parent->start = consumer_start;
 130                 parent->stop = consumer_stop;
 131                 parent->is_stopped = consumer_is_stopped;
 132
 133                 // Register specific events
 134                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 135
 136                 // Return the consumer produced
 137                 return parent;
 138         }
 139
 140         // malloc or consumer init failed
 141         free( this );
 142
 143         // Indicate failure
 144         return NULL;
 145 }
 146
 147 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 148 {
 149         if ( listener != NULL )
 150                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 151 }
 152
 153 static int consumer_start( mlt_consumer parent )
 154 {
 155         consumer_sdl this = parent->child;
 156
 157         if ( !this->running )
 158         {
 159                 pthread_attr_t thread_attributes;
 160
 161                 // Attach a colour space converter
 162                 if ( !this->filtered )
 163                 {
 164                         mlt_filter filter = mlt_factory_filter( "avcolour_space", NULL );
 165                         mlt_properties_set_int( mlt_filter_properties( filter ), "forced", mlt_image_yuv422 );
 166                         mlt_service_attach( mlt_consumer_service( &this->parent ), filter );
 167                         mlt_filter_close( filter );
 168                         this->filtered = 1;
 169                 }
 170
 171                 consumer_stop( parent );
 172
 173                 this->last_position = -1;
 174                 this->running = 1;
 175                 this->joined = 0;
 176
 177                 // Allow the user to force resizing to window size
 178                 if ( mlt_properties_get_int( this->properties, "resize" ) )
 179                 {
 180                         mlt_properties_set_int( this->properties, "width", this->width );
 181                         mlt_properties_set_int( this->properties, "height", this->height );
 182                 }
 183
 184                 //this->width = this->height * this->display_aspect;
 185
 186                 // Inherit the scheduling priority
 187                 pthread_attr_init( &thread_attributes );
 188                 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
 189
 190                 pthread_create( &this->thread, &thread_attributes, consumer_thread, this );
 191         }
 192
 193         return 0;
 194 }
 195
 196 static int consumer_stop( mlt_consumer parent )
 197 {
 198         // Get the actual object
 199         consumer_sdl this = parent->child;
 200
 201         if ( this->joined == 0 )
 202         {
 203                 // Kill the thread and clean up
 204                 this->running = 0;
 205
 206                 pthread_join( this->thread, NULL );
 207                 this->joined = 1;
 208         }
 209
 210         return 0;
 211 }
 212
 213 static int consumer_is_stopped( mlt_consumer parent )
 214 {
 215         consumer_sdl this = parent->child;
 216         return !this->running;
 217 }
 218
 219 static int sdl_lock_display( )
 220 {
 221         SDL_Surface *screen = SDL_GetVideoSurface( );
 222         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 223 }
 224
 225 static void sdl_unlock_display( )
 226 {
 227         SDL_Surface *screen = SDL_GetVideoSurface( );
 228         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 229                 SDL_UnlockSurface( screen );
 230 }
 231
 232 static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 233 {
 234         // Generate the affine transform scaling values
 235         int scale_width = ( width << 16 ) / rect.w;
 236         int scale_height = ( height << 16 ) / rect.h;
 237         int stride = width * 3;
 238         int x, y, row_index;
 239         uint8_t *q, *row;
 240
 241         // Constants defined for clarity and optimisation
 242         int scanlength = screen->pitch;
 243         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 244         uint8_t *p;
 245
 246         // Iterate through the screen using a very basic scaling algorithm
 247         for ( y = 0; y < rect.h; y ++ )
 248         {
 249                 p = start;
 250                 row_index = ( scale_height * y ) >> 16;
 251                 row = image + stride * row_index;
 252                 for ( x = 0; x < rect.w; x ++ )
 253                 {
 254                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 255                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 256                 }
 257                 start += scanlength;
 258         }
 259 }
 260
 261 static inline void display_2( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 262 {
 263         // Generate the affine transform scaling values
 264         int scale_width = ( width << 16 ) / rect.w;
 265         int scale_height = ( height << 16 ) / rect.h;
 266         int stride = width * 3;
 267         int x, y, row_index;
 268         uint8_t *q, *row;
 269
 270         // Constants defined for clarity and optimisation
 271         int scanlength = screen->pitch / 2;
 272         uint16_t *start = ( uint16_t * )screen->pixels + rect.y * scanlength + rect.x;
 273         uint16_t *p;
 274
 275         // Iterate through the screen using a very basic scaling algorithm
 276         for ( y = 0; y < rect.h; y ++ )
 277         {
 278                 p = start;
 279                 row_index = ( scale_height * y ) >> 16;
 280                 row = image + stride * row_index;
 281                 for ( x = 0; x < rect.w; x ++ )
 282                 {
 283                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 284                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 285                 }
 286                 start += scanlength;
 287         }
 288 }
 289
 290 static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 291 {
 292         // Generate the affine transform scaling values
 293         int scale_width = ( width << 16 ) / rect.w;
 294         int scale_height = ( height << 16 ) / rect.h;
 295         int stride = width * 3;
 296         int x, y, row_index;
 297         uint8_t *q, *row;
 298
 299         // Constants defined for clarity and optimisation
 300         int scanlength = screen->pitch;
 301         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 302         uint8_t *p;
 303         uint32_t pixel;
 304
 305         // Iterate through the screen using a very basic scaling algorithm
 306         for ( y = 0; y < rect.h; y ++ )
 307         {
 308                 p = start;
 309                 row_index = ( scale_height * y ) >> 16;
 310                 row = image + stride * row_index;
 311                 for ( x = 0; x < rect.w; x ++ )
 312                 {
 313                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 314                         pixel = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 315                         *p ++ = (pixel & 0xFF0000) >> 16;
 316                         *p ++ = (pixel & 0x00FF00) >> 8;
 317                         *p ++ = (pixel & 0x0000FF);
 318                 }
 319                 start += scanlength;
 320         }
 321 }
 322
 323 static inline void display_4( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 324 {
 325         // Generate the affine transform scaling values
 326         int scale_width = ( width << 16 ) / rect.w;
 327         int scale_height = ( height << 16 ) / rect.h;
 328         int stride = width * 3;
 329         int x, y, row_index;
 330         uint8_t *q, *row;
 331
 332         // Constants defined for clarity and optimisation
 333         int scanlength = screen->pitch / 4;
 334         uint32_t *start = ( uint32_t * )screen->pixels + rect.y * scanlength + rect.x;
 335         uint32_t *p;
 336
 337         // Iterate through the screen using a very basic scaling algorithm
 338         for ( y = 0; y < rect.h; y ++ )
 339         {
 340                 p = start;
 341                 row_index = ( scale_height * y ) >> 16;
 342                 row = image + stride * row_index;
 343                 for ( x = 0; x < rect.w; x ++ )
 344                 {
 345                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 346                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 347                 }
 348                 start += scanlength;
 349         }
 350 }
 351
 352 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 353 {
 354         // Get the properties of this consumer
 355         mlt_properties properties = this->properties;
 356
 357         mlt_image_format vfmt = mlt_image_rgb24;
 358         int height = this->height;
 359         int width = this->width;
 360         uint8_t *image = NULL;
 361         int changed = 0;
 362
 363         void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 364         void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 365
 366         if ( lock != NULL ) lock( );
 367
 368         sdl_lock_display();
 369
 370         // Handle events
 371         if ( this->sdl_screen != NULL )
 372         {
 373                 SDL_Event event;
 374
 375                 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 376
 377                 while ( SDL_PollEvent( &event ) )
 378                 {
 379                         mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 380
 381                         switch( event.type )
 382                         {
 383                                 case SDL_VIDEORESIZE:
 384                                         this->window_width = event.resize.w;
 385                                         this->window_height = event.resize.h;
 386                                         changed = 1;
 387                                         break;
 388                                 case SDL_QUIT:
 389                                         this->running = 0;
 390                                         break;
 391                                 case SDL_KEYDOWN:
 392                                         {
 393                                                 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 394                                                 char keyboard[ 2 ] = " ";
 395                                                 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 396                                                 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 397                                                 {
 398                                                         keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 399                                                         callback( producer, keyboard );
 400                                                 }
 401                                         }
 402                                         break;
 403                         }
 404                 }
 405         }
 406
 407         if ( this->sdl_screen == NULL || changed || mlt_properties_get_int( properties, "changed" ) == 2 )
 408         {
 409                 // open SDL window
 410                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 411                 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 412                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 413
 414                 changed = 1;
 415                 mlt_properties_set_int( properties, "changed", 0 );
 416         }
 417         else
 418         {
 419                 changed = mlt_properties_get_int( properties, "changed" ) | mlt_properties_get_int( mlt_frame_properties( frame ), "refresh" );
 420                 mlt_properties_set_int( properties, "changed", 0 );
 421         }
 422
 423
 424         if ( changed == 0 &&
 425                  this->last_position == mlt_frame_get_position( frame ) &&
 426                  this->last_producer == mlt_properties_get_data( mlt_frame_properties( frame ), "_producer", NULL ) )
 427         {
 428                 sdl_unlock_display( );
 429                 if ( unlock != NULL )
 430                         unlock( );
 431                 return 0;
 432         }
 433
 434         // Update last frame shown info
 435         this->last_position = mlt_frame_get_position( frame );
 436         this->last_producer = mlt_properties_get_data( mlt_frame_properties( frame ), "_producer", NULL );
 437
 438         // Get the image, width and height
 439         if ( image == NULL )
 440         {
 441                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 442
 443                 // I would like to provide upstream scaling here, but this is incorrect
 444                 // Something? (or everything?) is too sensitive to aspect ratio
 445                 //width = this->rect.w;
 446                 //height = this->rect.h;
 447                 //mlt_properties_set( mlt_frame_properties( frame ), "distort", "true" );
 448                 //mlt_properties_set_int( mlt_frame_properties( frame ), "normalised_width", width );
 449                 //mlt_properties_set_int( mlt_frame_properties( frame ), "normalised_height", height );
 450
 451                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 452         }
 453
 454         if ( image != NULL )
 455         {
 456                 char *rescale = mlt_properties_get( properties, "rescale" );
 457                 if ( rescale != NULL && strcmp( rescale, "none" ) )
 458                 {
 459                         float this_aspect = this->display_aspect / ( ( float )this->window_width / ( float )this->window_height );
 460                         this->rect.w = this_aspect * this->window_width;
 461                         this->rect.h = this->window_height;
 462                         if ( this->rect.w > this->window_width )
 463                         {
 464                                 this->rect.w = this->window_width;
 465                                 this->rect.h = ( 1.0 / this_aspect ) * this->window_height;
 466                         }
 467                 }
 468                 else
 469                 {
 470                         float frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 471                         this->rect.w = frame_aspect * this->window_height;
 472                         this->rect.h = this->window_height;
 473                         if ( this->rect.w > this->window_width )
 474                         {
 475                                 this->rect.w = this->window_width;
 476                                 this->rect.h = ( 1.0 / frame_aspect ) * this->window_width;
 477                         }
 478                 }
 479
 480                 this->rect.x = ( this->window_width - this->rect.w ) / 2;
 481                 this->rect.y = ( this->window_height - this->rect.h ) / 2;
 482
 483                 mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 484                 mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 485                 mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 486                 mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 487         }
 488
 489         if ( this->sdl_screen != NULL )
 490         {
 491                 memset( this->sdl_screen->pixels, 0, this->window_width * this->window_height * this->sdl_screen->format->BytesPerPixel );
 492
 493                 switch( this->sdl_screen->format->BytesPerPixel )
 494                 {
 495                         case 1:
 496                                 display_1( this->sdl_screen, this->rect, image, width, height );
 497                                 break;
 498                         case 2:
 499                                 display_2( this->sdl_screen, this->rect, image, width, height );
 500                                 break;
 501                         case 3:
 502                                 display_3( this->sdl_screen, this->rect, image, width, height );
 503                                 break;
 504                         case 4:
 505                                 display_4( this->sdl_screen, this->rect, image, width, height );
 506                                 break;
 507                         default:
 508                                 fprintf( stderr, "Unsupported video depth %d\n", this->sdl_screen->format->BytesPerPixel );
 509                                 break;
 510                 }
 511
 512                 // Flip it into sight
 513                 SDL_Flip( this->sdl_screen );
 514         }
 515
 516         sdl_unlock_display();
 517
 518         if ( unlock != NULL ) unlock( );
 519
 520         return 1;
 521 }
 522
 523 /** Threaded wrapper for pipe.
 524 */
 525
 526 static void *consumer_thread( void *arg )
 527 {
 528         // Identify the arg
 529         consumer_sdl this = arg;
 530
 531         // Get the consumer
 532         mlt_consumer consumer = &this->parent;
 533
 534         // internal intialization
 535         mlt_frame frame = NULL;
 536         struct timespec tm = { 0, 10000000 };
 537
 538         if ( mlt_properties_get_int( mlt_consumer_properties( consumer ), "sdl_started" ) == 0 )
 539         {
 540                 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 541                 {
 542                         fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 543                         return NULL;
 544                 }
 545
 546                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 547                 SDL_EnableUNICODE( 1 );
 548         }
 549         else
 550         {
 551                 mlt_properties_set_int( mlt_consumer_properties( consumer ), "changed", 2 );
 552                 if ( SDL_GetVideoSurface( ) != NULL )
 553                 {
 554                         this->sdl_screen = SDL_GetVideoSurface( );
 555                         consumer_get_dimensions( &this->window_width, &this->window_height );
 556                         mlt_properties_set_int( mlt_consumer_properties( consumer ), "changed", 0 );
 557                 }
 558         }
 559
 560         // Loop until told not to
 561         while( this->running )
 562         {
 563                 // Get a frame from the attached producer
 564                 frame = mlt_consumer_rt_frame( consumer );
 565
 566                 // Ensure that we have a frame
 567                 if ( frame != NULL )
 568                 {
 569                         if ( consumer_play_video( this, frame ) == 0 )
 570                                 nanosleep( &tm, NULL );
 571                         mlt_frame_close( frame );
 572                 }
 573         }
 574
 575         if ( mlt_properties_get_int( mlt_consumer_properties( consumer ), "sdl_started" ) == 0 )
 576                 SDL_Quit( );
 577
 578         this->sdl_screen = NULL;
 579
 580         return NULL;
 581 }
 582
 583 static int consumer_get_dimensions( int *width, int *height )
 584 {
 585         int changed = 0;
 586
 587         // SDL windows manager structure
 588         SDL_SysWMinfo wm;
 589
 590         // Specify the SDL Version
 591         SDL_VERSION( &wm.version );
 592
 593         // Get the wm structure
 594         if ( SDL_GetWMInfo( &wm ) == 1 )
 595         {
 596                 // Check that we have the X11 wm
 597                 if ( wm.subsystem == SDL_SYSWM_X11 )
 598                 {
 599                         // Get the SDL window
 600                         Window window = wm.info.x11.window;
 601
 602                         // Get the display session
 603                         Display *display = wm.info.x11.display;
 604
 605                         // Get the window attributes
 606                         XWindowAttributes attr;
 607                         XGetWindowAttributes( display, window, &attr );
 608
 609                         // Determine whether window has changed
 610                         changed = *width != attr.width || *height != attr.height;
 611
 612                         // Return width and height
 613                         *width = attr.width;
 614                         *height = attr.height;
 615                 }
 616         }
 617
 618         return changed;
 619 }
 620
 621 /** Callback to allow override of the close method.
 622 */
 623
 624 static void consumer_close( mlt_consumer parent )
 625 {
 626         // Get the actual object
 627         consumer_sdl this = parent->child;
 628
 629         // Stop the consumer
 630         mlt_consumer_stop( parent );
 631
 632         // Now clean up the rest
 633         mlt_consumer_close( parent );
 634
 635         // Finally clean up this
 636         free( this );
 637 }