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 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 /** This classes definition.
  36 */
  37
  38 typedef struct consumer_sdl_s *consumer_sdl;
  39
  40 struct consumer_sdl_s
  41 {
  42         struct mlt_consumer_s parent;
  43         mlt_properties properties;
  44         pthread_t thread;
  45         int joined;
  46         int running;
  47         int window_width;
  48         int window_height;
  49         int width;
  50         int height;
  51         int playing;
  52         int sdl_flags;
  53         SDL_Surface *sdl_screen;
  54         SDL_Rect rect;
  55         uint8_t *buffer;
  56         int last_position;
  57         mlt_producer last_producer;
  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( mlt_profile profile, mlt_service_type type, const char *id, 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, profile ) == 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                 // We have stuff to clean up, so override the close method
  91                 parent->close = consumer_close;
  92
  93                 // Default scaler (for now we'll use nearest)
  94                 mlt_properties_set( this->properties, "rescale", "nearest" );
  95
  96                 // We're always going to run this in non-realtime mode
  97                 mlt_properties_set( this->properties, "real_time", "0" );
  98
  99                 // Ensure we don't join on a non-running object
 100                 this->joined = 1;
 101
 102                 // process actual param
 103                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 104                 {
 105                         this->width = mlt_properties_get_int( this->properties, "width" );
 106                         this->height = mlt_properties_get_int( this->properties, "height" );
 107                 }
 108                 else
 109                 {
 110                         mlt_properties_set_int( this->properties, "width", this->width );
 111                         mlt_properties_set_int( this->properties, "height", this->height );
 112                 }
 113
 114                 // Set the sdl flags
 115                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 116
 117                 // Allow thread to be started/stopped
 118                 parent->start = consumer_start;
 119                 parent->stop = consumer_stop;
 120                 parent->is_stopped = consumer_is_stopped;
 121
 122                 // Register specific events
 123                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 124
 125                 // Return the consumer produced
 126                 return parent;
 127         }
 128
 129         // malloc or consumer init failed
 130         free( this );
 131
 132         // Indicate failure
 133         return NULL;
 134 }
 135
 136 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 137 {
 138         if ( listener != NULL )
 139                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 140 }
 141
 142 static int consumer_start( mlt_consumer parent )
 143 {
 144         consumer_sdl this = parent->child;
 145
 146         if ( !this->running )
 147         {
 148                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 149                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 150
 151                 consumer_stop( parent );
 152
 153                 this->last_position = -1;
 154                 this->running = 1;
 155                 this->joined = 0;
 156
 157                 // Allow the user to force resizing to window size
 158                 this->width = mlt_properties_get_int( this->properties, "width" );
 159                 this->height = mlt_properties_get_int( this->properties, "height" );
 160
 161                 // Default window size
 162                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 163                 this->window_width = ( double )this->height * display_ratio;
 164                 this->window_height = this->height;
 165
 166                 if ( sdl_started == 0 && preview_off == 0 )
 167                 {
 168                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 169                         {
 170                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 171                                 return -1;
 172                         }
 173
 174                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 175                         SDL_EnableUNICODE( 1 );
 176                 }
 177                 else if ( preview_off == 0 )
 178                 {
 179                         if ( SDL_GetVideoSurface( ) != NULL )
 180                         {
 181                                 this->sdl_screen = SDL_GetVideoSurface( );
 182                         }
 183                 }
 184
 185                 if ( this->sdl_screen == NULL && preview_off == 0 )
 186                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 187
 188                 pthread_create( &this->thread, NULL, consumer_thread, this );
 189         }
 190
 191         return 0;
 192 }
 193
 194 static int consumer_stop( mlt_consumer parent )
 195 {
 196         // Get the actual object
 197         consumer_sdl this = parent->child;
 198
 199         if ( this->joined == 0 )
 200         {
 201                 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
 202                 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
 203
 204                 // Kill the thread and clean up
 205                 this->running = 0;
 206
 207                 pthread_join( this->thread, NULL );
 208                 this->joined = 1;
 209
 210                 if ( sdl_started == 0 && preview_off == 0 )
 211                         SDL_Quit( );
 212
 213                 this->sdl_screen = NULL;
 214         }
 215
 216         return 0;
 217 }
 218
 219 static int consumer_is_stopped( mlt_consumer parent )
 220 {
 221         consumer_sdl this = parent->child;
 222         return !this->running;
 223 }
 224
 225 static int sdl_lock_display( )
 226 {
 227         SDL_Surface *screen = SDL_GetVideoSurface( );
 228         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 229 }
 230
 231 static void sdl_unlock_display( )
 232 {
 233         SDL_Surface *screen = SDL_GetVideoSurface( );
 234         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 235                 SDL_UnlockSurface( screen );
 236 }
 237
 238 static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 239 {
 240         // Generate the affine transform scaling values
 241         if ( rect.w == 0 || rect.h == 0 ) return;
 242         int scale_width = ( width << 16 ) / rect.w;
 243         int scale_height = ( height << 16 ) / rect.h;
 244         int stride = width * 3;
 245         int x, y, row_index;
 246         uint8_t *q, *row;
 247
 248         // Constants defined for clarity and optimisation
 249         int scanlength = screen->pitch;
 250         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 251         uint8_t *p;
 252
 253         // Iterate through the screen using a very basic scaling algorithm
 254         for ( y = 0; y < rect.h; y ++ )
 255         {
 256                 p = start;
 257                 row_index = ( 32768 + scale_height * y ) >> 16;
 258                 row = image + stride * row_index;
 259                 for ( x = 0; x < rect.w; x ++ )
 260                 {
 261                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 262                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 263                 }
 264                 start += scanlength;
 265         }
 266 }
 267
 268 static inline void display_2( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 269 {
 270         // Generate the affine transform scaling values
 271         if ( rect.w == 0 || rect.h == 0 ) return;
 272         int scale_width = ( width << 16 ) / rect.w;
 273         int scale_height = ( height << 16 ) / rect.h;
 274         int stride = width * 3;
 275         int x, y, row_index;
 276         uint8_t *q, *row;
 277
 278         // Constants defined for clarity and optimisation
 279         int scanlength = screen->pitch / 2;
 280         uint16_t *start = ( uint16_t * )screen->pixels + rect.y * scanlength + rect.x;
 281         uint16_t *p;
 282
 283         // Iterate through the screen using a very basic scaling algorithm
 284         for ( y = 0; y < rect.h; y ++ )
 285         {
 286                 p = start;
 287                 row_index = ( 32768 + scale_height * y ) >> 16;
 288                 row = image + stride * row_index;
 289                 for ( x = 0; x < rect.w; x ++ )
 290                 {
 291                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 292                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 293                 }
 294                 start += scanlength;
 295         }
 296 }
 297
 298 static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 299 {
 300         // Generate the affine transform scaling values
 301         if ( rect.w == 0 || rect.h == 0 ) return;
 302         int scale_width = ( width << 16 ) / rect.w;
 303         int scale_height = ( height << 16 ) / rect.h;
 304         int stride = width * 3;
 305         int x, y, row_index;
 306         uint8_t *q, *row;
 307
 308         // Constants defined for clarity and optimisation
 309         int scanlength = screen->pitch;
 310         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 311         uint8_t *p;
 312         uint32_t pixel;
 313
 314         // Iterate through the screen using a very basic scaling algorithm
 315         for ( y = 0; y < rect.h; y ++ )
 316         {
 317                 p = start;
 318                 row_index = ( 32768 + scale_height * y ) >> 16;
 319                 row = image + stride * row_index;
 320                 for ( x = 0; x < rect.w; x ++ )
 321                 {
 322                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 323                         pixel = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 324                         *p ++ = (pixel & 0xFF0000) >> 16;
 325                         *p ++ = (pixel & 0x00FF00) >> 8;
 326                         *p ++ = (pixel & 0x0000FF);
 327                 }
 328                 start += scanlength;
 329         }
 330 }
 331
 332 static inline void display_4( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 333 {
 334         // Generate the affine transform scaling values
 335         if ( rect.w == 0 || rect.h == 0 ) return;
 336         int scale_width = ( width << 16 ) / rect.w;
 337         int scale_height = ( height << 16 ) / rect.h;
 338         int stride = width * 3;
 339         int x, y, row_index;
 340         uint8_t *q, *row;
 341
 342         // Constants defined for clarity and optimisation
 343         int scanlength = screen->pitch / 4;
 344         uint32_t *start = ( uint32_t * )screen->pixels + rect.y * scanlength + rect.x;
 345         uint32_t *p;
 346
 347         // Iterate through the screen using a very basic scaling algorithm
 348         for ( y = 0; y < rect.h; y ++ )
 349         {
 350                 p = start;
 351                 row_index = ( 32768 + scale_height * y ) >> 16;
 352                 row = image + stride * row_index;
 353                 for ( x = 0; x < rect.w; x ++ )
 354                 {
 355                         q = row + ( ( ( 32768 + scale_width * x ) >> 16 ) * 3 );
 356                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 357                 }
 358                 start += scanlength;
 359         }
 360 }
 361
 362 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 363 {
 364         // Get the properties of this consumer
 365         mlt_properties properties = this->properties;
 366
 367         mlt_image_format vfmt = mlt_image_rgb24;
 368         int height = this->height;
 369         int width = this->width;
 370         uint8_t *image = NULL;
 371         int changed = 0;
 372         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 373
 374         void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 375         void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 376
 377         if ( lock != NULL ) lock( );
 378
 379         sdl_lock_display();
 380
 381         // Handle events
 382         if ( this->sdl_screen != NULL )
 383         {
 384                 SDL_Event event;
 385
 386                 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 387
 388                 while ( SDL_PollEvent( &event ) )
 389                 {
 390                         mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 391
 392                         switch( event.type )
 393                         {
 394                                 case SDL_VIDEORESIZE:
 395                                         this->window_width = event.resize.w;
 396                                         this->window_height = event.resize.h;
 397                                         changed = 1;
 398                                         break;
 399                                 case SDL_QUIT:
 400                                         this->running = 0;
 401                                         break;
 402                                 case SDL_KEYDOWN:
 403                                         {
 404                                                 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 405                                                 char keyboard[ 2 ] = " ";
 406                                                 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 407                                                 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 408                                                 {
 409                                                         keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 410                                                         callback( producer, keyboard );
 411                                                 }
 412                                         }
 413                                         break;
 414                         }
 415                 }
 416         }
 417
 418         if ( this->sdl_screen == NULL || changed )
 419         {
 420                 // open SDL window
 421                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 422                 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 423                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 424                 uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
 425                 SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
 426                 changed = 1;
 427         }
 428
 429         if ( changed == 0 &&
 430                  this->last_position == mlt_frame_get_position( frame ) &&
 431                  this->last_producer == mlt_frame_get_original_producer( frame ) &&
 432                  !mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "refresh" ) )
 433         {
 434                 sdl_unlock_display( );
 435                 if ( unlock != NULL ) unlock( );
 436                 struct timespec tm = { 0, 100000 };
 437                 nanosleep( &tm, NULL );
 438                 return 0;
 439         }
 440
 441         // Update last frame shown info
 442         this->last_position = mlt_frame_get_position( frame );
 443         this->last_producer = mlt_frame_get_original_producer( frame );
 444
 445         // Get the image, width and height
 446         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 447         mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 448
 449         if ( image != NULL )
 450         {
 451                 char *rescale = mlt_properties_get( properties, "rescale" );
 452                 if ( rescale != NULL && strcmp( rescale, "none" ) )
 453                 {
 454                         double this_aspect = display_ratio / ( ( double )this->window_width / ( double )this->window_height );
 455                         this->rect.w = this_aspect * this->window_width;
 456                         this->rect.h = this->window_height;
 457                         if ( this->rect.w > this->window_width )
 458                         {
 459                                 this->rect.w = this->window_width;
 460                                 this->rect.h = ( 1.0 / this_aspect ) * this->window_height;
 461                         }
 462                 }
 463                 else
 464                 {
 465                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 466                         this->rect.w = frame_aspect * this->window_height;
 467                         this->rect.h = this->window_height;
 468                         if ( this->rect.w > this->window_width )
 469                         {
 470                                 this->rect.w = this->window_width;
 471                                 this->rect.h = ( 1.0 / frame_aspect ) * this->window_width;
 472                         }
 473                 }
 474
 475                 this->rect.x = ( this->window_width - this->rect.w ) / 2;
 476                 this->rect.y = ( this->window_height - this->rect.h ) / 2;
 477
 478                 mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 479                 mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 480                 mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 481                 mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 482         }
 483
 484         if ( !mlt_consumer_is_stopped( &this->parent ) && SDL_GetVideoSurface( ) != NULL && this->sdl_screen != NULL && this->sdl_screen->pixels != NULL )
 485         {
 486                 switch( this->sdl_screen->format->BytesPerPixel )
 487                 {
 488                         case 1:
 489                                 display_1( this->sdl_screen, this->rect, image, width, height );
 490                                 break;
 491                         case 2:
 492                                 display_2( this->sdl_screen, this->rect, image, width, height );
 493                                 break;
 494                         case 3:
 495                                 display_3( this->sdl_screen, this->rect, image, width, height );
 496                                 break;
 497                         case 4:
 498                                 display_4( this->sdl_screen, this->rect, image, width, height );
 499                                 break;
 500                         default:
 501                                 fprintf( stderr, "Unsupported video depth %d\n", this->sdl_screen->format->BytesPerPixel );
 502                                 break;
 503                 }
 504
 505                 // Flip it into sight
 506                 SDL_Flip( this->sdl_screen );
 507         }
 508
 509         sdl_unlock_display();
 510
 511         if ( unlock != NULL ) unlock( );
 512
 513         return 1;
 514 }
 515
 516 /** Threaded wrapper for pipe.
 517 */
 518
 519 static void *consumer_thread( void *arg )
 520 {
 521         // Identify the arg
 522         consumer_sdl this = arg;
 523
 524         // Get the consumer
 525         mlt_consumer consumer = &this->parent;
 526         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 527         mlt_frame frame = NULL;
 528
 529         // Allow the hosting app to provide the preview
 530         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 531
 532         // Loop until told not to
 533         while( this->running )
 534         {
 535                 // Get a frame from the attached producer
 536                 frame = mlt_consumer_rt_frame( consumer );
 537
 538                 // Ensure that we have a frame
 539                 if ( this->running && frame != NULL )
 540                 {
 541                         if ( preview_off == 0 )
 542                         {
 543                                 consumer_play_video( this, frame );
 544                         }
 545                         else
 546                         {
 547                                 mlt_image_format vfmt = mlt_image_rgb24a;
 548                                 int height = this->height;
 549                                 int width = this->width;
 550                                 uint8_t *image = NULL;
 551                                 mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 552
 553                                 // Check if a specific colour space has been requested
 554                                 if ( preview_off && preview_format != mlt_image_none )
 555                                         vfmt = preview_format;
 556
 557                                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 558                                 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
 559                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 560                         }
 561                         mlt_frame_close( frame );
 562                 }
 563                 else
 564                 {
 565                         if ( frame ) mlt_frame_close( frame );
 566                         this->running = 0;
 567                 }
 568         }
 569
 570         return NULL;
 571 }
 572
 573 static int consumer_get_dimensions( int *width, int *height )
 574 {
 575         int changed = 0;
 576
 577         // SDL windows manager structure
 578         SDL_SysWMinfo wm;
 579
 580         // Specify the SDL Version
 581         SDL_VERSION( &wm.version );
 582
 583         // Get the wm structure
 584         if ( SDL_GetWMInfo( &wm ) == 1 )
 585         {
 586 #ifndef __DARWIN__
 587                 // Check that we have the X11 wm
 588                 if ( wm.subsystem == SDL_SYSWM_X11 )
 589                 {
 590                         // Get the SDL window
 591                         Window window = wm.info.x11.window;
 592
 593                         // Get the display session
 594                         Display *display = wm.info.x11.display;
 595
 596                         // Get the window attributes
 597                         XWindowAttributes attr;
 598                         XGetWindowAttributes( display, window, &attr );
 599
 600                         // Determine whether window has changed
 601                         changed = *width != attr.width || *height != attr.height;
 602
 603                         // Return width and height
 604                         *width = attr.width;
 605                         *height = attr.height;
 606                 }
 607 #endif
 608         }
 609
 610         return changed;
 611 }
 612
 613 /** Callback to allow override of the close method.
 614 */
 615
 616 static void consumer_close( mlt_consumer parent )
 617 {
 618         // Get the actual object
 619         consumer_sdl this = parent->child;
 620
 621         // Stop the consumer
 622         mlt_consumer_stop( parent );
 623
 624         // Now clean up the rest
 625         mlt_consumer_close( parent );
 626
 627         // Finally clean up this
 628         free( this );
 629 }