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