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                 // Experimental settings
 128                 this->sdl_flags = SDL_RESIZABLE | SDL_DOUBLEBUF;
 129
 130                 // Allow thread to be started/stopped
 131                 parent->start = consumer_start;
 132                 parent->stop = consumer_stop;
 133                 parent->is_stopped = consumer_is_stopped;
 134
 135                 // Register specific events
 136                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 137
 138                 // Return the consumer produced
 139                 return parent;
 140         }
 141
 142         // malloc or consumer init failed
 143         free( this );
 144
 145         // Indicate failure
 146         return NULL;
 147 }
 148
 149 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 150 {
 151         if ( listener != NULL )
 152                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 153 }
 154
 155 static int consumer_start( mlt_consumer parent )
 156 {
 157         consumer_sdl this = parent->child;
 158
 159         if ( !this->running )
 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( 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                 pthread_create( &this->thread, NULL, consumer_thread, this );
 187         }
 188
 189         return 0;
 190 }
 191
 192 static int consumer_stop( mlt_consumer parent )
 193 {
 194         // Get the actual object
 195         consumer_sdl this = parent->child;
 196
 197         if ( this->joined == 0 )
 198         {
 199                 // Kill the thread and clean up
 200                 this->running = 0;
 201
 202                 pthread_join( this->thread, NULL );
 203                 this->joined = 1;
 204         }
 205
 206         return 0;
 207 }
 208
 209 static int consumer_is_stopped( mlt_consumer parent )
 210 {
 211         consumer_sdl this = parent->child;
 212         return !this->running;
 213 }
 214
 215 static int sdl_lock_display( )
 216 {
 217         SDL_Surface *screen = SDL_GetVideoSurface( );
 218         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 219 }
 220
 221 static void sdl_unlock_display( )
 222 {
 223         SDL_Surface *screen = SDL_GetVideoSurface( );
 224         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 225                 SDL_UnlockSurface( screen );
 226 }
 227
 228 static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 229 {
 230         // Generate the affine transform scaling values
 231         int scale_width = ( width << 16 ) / rect.w;
 232         int scale_height = ( height << 16 ) / rect.h;
 233         int stride = width * 3;
 234         int x, y, row_index;
 235         uint8_t *q, *row;
 236
 237         // Constants defined for clarity and optimisation
 238         int scanlength = screen->pitch;
 239         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 240         uint8_t *p;
 241
 242         // Iterate through the screen using a very basic scaling algorithm
 243         for ( y = 0; y < rect.h; y ++ )
 244         {
 245                 p = start;
 246                 row_index = ( scale_height * y ) >> 16;
 247                 row = image + stride * row_index;
 248                 for ( x = 0; x < rect.w; x ++ )
 249                 {
 250                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 251                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 252                 }
 253                 start += scanlength;
 254         }
 255 }
 256
 257 static inline void display_2( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 258 {
 259         // Generate the affine transform scaling values
 260         int scale_width = ( width << 16 ) / rect.w;
 261         int scale_height = ( height << 16 ) / rect.h;
 262         int stride = width * 3;
 263         int x, y, row_index;
 264         uint8_t *q, *row;
 265
 266         // Constants defined for clarity and optimisation
 267         int scanlength = screen->pitch / 2;
 268         uint16_t *start = ( uint16_t * )screen->pixels + rect.y * scanlength + rect.x;
 269         uint16_t *p;
 270
 271         // Iterate through the screen using a very basic scaling algorithm
 272         for ( y = 0; y < rect.h; y ++ )
 273         {
 274                 p = start;
 275                 row_index = ( scale_height * y ) >> 16;
 276                 row = image + stride * row_index;
 277                 for ( x = 0; x < rect.w; x ++ )
 278                 {
 279                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 280                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 281                 }
 282                 start += scanlength;
 283         }
 284 }
 285
 286 static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 287 {
 288         // Generate the affine transform scaling values
 289         int scale_width = ( width << 16 ) / rect.w;
 290         int scale_height = ( height << 16 ) / rect.h;
 291         int stride = width * 3;
 292         int x, y, row_index;
 293         uint8_t *q, *row;
 294
 295         // Constants defined for clarity and optimisation
 296         int scanlength = screen->pitch;
 297         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 298         uint8_t *p;
 299         uint32_t pixel;
 300
 301         // Iterate through the screen using a very basic scaling algorithm
 302         for ( y = 0; y < rect.h; y ++ )
 303         {
 304                 p = start;
 305                 row_index = ( scale_height * y ) >> 16;
 306                 row = image + stride * row_index;
 307                 for ( x = 0; x < rect.w; x ++ )
 308                 {
 309                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 310                         pixel = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 311                         *p ++ = (pixel & 0xFF0000) >> 16;
 312                         *p ++ = (pixel & 0x00FF00) >> 8;
 313                         *p ++ = (pixel & 0x0000FF);
 314                 }
 315                 start += scanlength;
 316         }
 317 }
 318
 319 static inline void display_4( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 320 {
 321         // Generate the affine transform scaling values
 322         int scale_width = ( width << 16 ) / rect.w;
 323         int scale_height = ( height << 16 ) / rect.h;
 324         int stride = width * 3;
 325         int x, y, row_index;
 326         uint8_t *q, *row;
 327
 328         // Constants defined for clarity and optimisation
 329         int scanlength = screen->pitch / 4;
 330         uint32_t *start = ( uint32_t * )screen->pixels + rect.y * scanlength + rect.x;
 331         uint32_t *p;
 332
 333         // Iterate through the screen using a very basic scaling algorithm
 334         for ( y = 0; y < rect.h; y ++ )
 335         {
 336                 p = start;
 337                 row_index = ( scale_height * y ) >> 16;
 338                 row = image + stride * row_index;
 339                 for ( x = 0; x < rect.w; x ++ )
 340                 {
 341                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 342                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 343                 }
 344                 start += scanlength;
 345         }
 346 }
 347
 348 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 349 {
 350         // Get the properties of this consumer
 351         mlt_properties properties = this->properties;
 352
 353         mlt_image_format vfmt = mlt_image_rgb24;
 354         int height = this->height;
 355         int width = this->width;
 356         uint8_t *image = NULL;
 357         int changed = 0;
 358
 359         void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 360         void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 361
 362         if ( lock != NULL ) lock( );
 363
 364         sdl_lock_display();
 365
 366         // Handle events
 367         if ( this->sdl_screen != NULL )
 368         {
 369                 SDL_Event event;
 370
 371                 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 372
 373                 while ( SDL_PollEvent( &event ) )
 374                 {
 375                         mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 376
 377                         switch( event.type )
 378                         {
 379                                 case SDL_VIDEORESIZE:
 380                                         this->window_width = event.resize.w;
 381                                         this->window_height = event.resize.h;
 382                                         changed = 1;
 383                                         break;
 384                                 case SDL_QUIT:
 385                                         this->running = 0;
 386                                         break;
 387                                 case SDL_KEYDOWN:
 388                                         {
 389                                                 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 390                                                 char keyboard[ 2 ] = " ";
 391                                                 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 392                                                 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 393                                                 {
 394                                                         keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 395                                                         callback( producer, keyboard );
 396                                                 }
 397                                         }
 398                                         break;
 399                         }
 400                 }
 401         }
 402
 403         if ( this->sdl_screen == NULL || changed || mlt_properties_get_int( properties, "changed" ) == 2 )
 404         {
 405                 // open SDL window
 406                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 407                 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 408                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 409
 410                 changed = 1;
 411                 mlt_properties_set_int( properties, "changed", 0 );
 412         }
 413         else
 414         {
 415                 changed = 1;
 416                 mlt_properties_set_int( properties, "changed", 0 );
 417         }
 418
 419         if ( changed == 0 &&
 420                  this->last_position == mlt_frame_get_position( frame ) &&
 421                  this->last_producer == mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL ) )
 422         {
 423                 sdl_unlock_display( );
 424                 if ( unlock != NULL )
 425                         unlock( );
 426                 return 0;
 427         }
 428
 429         // Update last frame shown info
 430         this->last_position = mlt_frame_get_position( frame );
 431         this->last_producer = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL );
 432
 433         // Get the image, width and height
 434         if ( image == NULL )
 435         {
 436                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 437
 438                 // I would like to provide upstream scaling here, but this is incorrect
 439                 // Something? (or everything?) is too sensitive to aspect ratio
 440                 //width = this->rect.w;
 441                 //height = this->rect.h;
 442                 //mlt_properties_set( MLT_FRAME_PROPERTIES( frame ), "distort", "true" );
 443                 //mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "normalised_width", width );
 444                 //mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "normalised_height", height );
 445
 446                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 447         }
 448
 449         if ( image != NULL )
 450         {
 451                 char *rescale = mlt_properties_get( properties, "rescale" );
 452                 if ( rescale != NULL && strcmp( rescale, "none" ) )
 453                 {
 454                         float this_aspect = this->display_aspect / ( ( float )this->window_width / ( float )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                         float 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                 memset( this->sdl_screen->pixels, 0, this->window_width * this->window_height * this->sdl_screen->format->BytesPerPixel );
 487
 488                 switch( this->sdl_screen->format->BytesPerPixel )
 489                 {
 490                         case 1:
 491                                 display_1( this->sdl_screen, this->rect, image, width, height );
 492                                 break;
 493                         case 2:
 494                                 display_2( this->sdl_screen, this->rect, image, width, height );
 495                                 break;
 496                         case 3:
 497                                 display_3( this->sdl_screen, this->rect, image, width, height );
 498                                 break;
 499                         case 4:
 500                                 display_4( this->sdl_screen, this->rect, image, width, height );
 501                                 break;
 502                         default:
 503                                 fprintf( stderr, "Unsupported video depth %d\n", this->sdl_screen->format->BytesPerPixel );
 504                                 break;
 505                 }
 506
 507                 // Flip it into sight
 508                 SDL_Flip( this->sdl_screen );
 509         }
 510
 511         sdl_unlock_display();
 512
 513         if ( unlock != NULL ) unlock( );
 514
 515         return 1;
 516 }
 517
 518 /** Threaded wrapper for pipe.
 519 */
 520
 521 static void *consumer_thread( void *arg )
 522 {
 523         // Identify the arg
 524         consumer_sdl this = arg;
 525
 526         // Get the consumer
 527         mlt_consumer consumer = &this->parent;
 528
 529         // internal intialization
 530         mlt_frame frame = NULL;
 531
 532         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "sdl_started" ) == 0 )
 533         {
 534                 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 535                 {
 536                         fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 537                         return NULL;
 538                 }
 539
 540                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 541                 SDL_EnableUNICODE( 1 );
 542         }
 543         else
 544         {
 545                 mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( consumer ), "changed", 2 );
 546                 if ( SDL_GetVideoSurface( ) != NULL )
 547                 {
 548                         this->sdl_screen = SDL_GetVideoSurface( );
 549                         consumer_get_dimensions( &this->window_width, &this->window_height );
 550                         mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( consumer ), "changed", 0 );
 551                 }
 552         }
 553
 554         // Loop until told not to
 555         while( this->running )
 556         {
 557                 // Get a frame from the attached producer
 558                 frame = mlt_consumer_rt_frame( consumer );
 559
 560                 // Ensure that we have a frame
 561                 if ( frame != NULL )
 562                 {
 563                         consumer_play_video( this, frame );
 564                         mlt_frame_close( frame );
 565                 }
 566                 else
 567                 {
 568                         this->running = 0;
 569                 }
 570         }
 571
 572         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "sdl_started" ) == 0 )
 573                 SDL_Quit( );
 574
 575         this->sdl_screen = NULL;
 576
 577         return NULL;
 578 }
 579
 580 static int consumer_get_dimensions( int *width, int *height )
 581 {
 582         int changed = 0;
 583
 584         // SDL windows manager structure
 585         SDL_SysWMinfo wm;
 586
 587         // Specify the SDL Version
 588         SDL_VERSION( &wm.version );
 589
 590         // Get the wm structure
 591         if ( SDL_GetWMInfo( &wm ) == 1 )
 592         {
 593 #ifndef __DARWIN__
 594                 // Check that we have the X11 wm
 595                 if ( wm.subsystem == SDL_SYSWM_X11 )
 596                 {
 597                         // Get the SDL window
 598                         Window window = wm.info.x11.window;
 599
 600                         // Get the display session
 601                         Display *display = wm.info.x11.display;
 602
 603                         // Get the window attributes
 604                         XWindowAttributes attr;
 605                         XGetWindowAttributes( display, window, &attr );
 606
 607                         // Determine whether window has changed
 608                         changed = *width != attr.width || *height != attr.height;
 609
 610                         // Return width and height
 611                         *width = attr.width;
 612                         *height = attr.height;
 613                 }
 614 #endif
 615         }
 616
 617         return changed;
 618 }
 619
 620 /** Callback to allow override of the close method.
 621 */
 622
 623 static void consumer_close( mlt_consumer parent )
 624 {
 625         // Get the actual object
 626         consumer_sdl this = parent->child;
 627
 628         // Stop the consumer
 629         mlt_consumer_stop( parent );
 630
 631         // Now clean up the rest
 632         mlt_consumer_close( parent );
 633
 634         // Finally clean up this
 635         free( this );
 636 }