research.m1stereo.tv/gitweb/ - melted/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                 pthread_attr_t thread_attributes;
 162
 163                 // Attach a colour space converter
 164                 if ( !this->filtered )
 165                 {
 166                         mlt_filter filter = mlt_factory_filter( "avcolour_space", NULL );
 167                         mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "forced", mlt_image_yuv422 );
 168                         mlt_service_attach( MLT_CONSUMER_SERVICE( parent ), filter );
 169                         mlt_filter_close( filter );
 170                         this->filtered = 1;
 171                 }
 172
 173                 consumer_stop( parent );
 174
 175                 this->last_position = -1;
 176                 this->running = 1;
 177                 this->joined = 0;
 178
 179                 // Allow the user to force resizing to window size
 180                 if ( mlt_properties_get_int( this->properties, "resize" ) )
 181                 {
 182                         mlt_properties_set_int( this->properties, "width", this->width );
 183                         mlt_properties_set_int( this->properties, "height", this->height );
 184                 }
 185
 186                 //this->width = this->height * this->display_aspect;
 187
 188                 // Inherit the scheduling priority
 189                 pthread_attr_init( &thread_attributes );
 190                 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
 191
 192                 pthread_create( &this->thread, &thread_attributes, consumer_thread, this );
 193         }
 194
 195         return 0;
 196 }
 197
 198 static int consumer_stop( mlt_consumer parent )
 199 {
 200         // Get the actual object
 201         consumer_sdl this = parent->child;
 202
 203         if ( this->joined == 0 )
 204         {
 205                 // Kill the thread and clean up
 206                 this->running = 0;
 207
 208                 pthread_join( this->thread, NULL );
 209                 this->joined = 1;
 210         }
 211
 212         return 0;
 213 }
 214
 215 static int consumer_is_stopped( mlt_consumer parent )
 216 {
 217         consumer_sdl this = parent->child;
 218         return !this->running;
 219 }
 220
 221 static int sdl_lock_display( )
 222 {
 223         SDL_Surface *screen = SDL_GetVideoSurface( );
 224         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 225 }
 226
 227 static void sdl_unlock_display( )
 228 {
 229         SDL_Surface *screen = SDL_GetVideoSurface( );
 230         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 231                 SDL_UnlockSurface( screen );
 232 }
 233
 234 static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 235 {
 236         // Generate the affine transform scaling values
 237         int scale_width = ( width << 16 ) / rect.w;
 238         int scale_height = ( height << 16 ) / rect.h;
 239         int stride = width * 3;
 240         int x, y, row_index;
 241         uint8_t *q, *row;
 242
 243         // Constants defined for clarity and optimisation
 244         int scanlength = screen->pitch;
 245         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 246         uint8_t *p;
 247
 248         // Iterate through the screen using a very basic scaling algorithm
 249         for ( y = 0; y < rect.h; y ++ )
 250         {
 251                 p = start;
 252                 row_index = ( scale_height * y ) >> 16;
 253                 row = image + stride * row_index;
 254                 for ( x = 0; x < rect.w; x ++ )
 255                 {
 256                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 257                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 258                 }
 259                 start += scanlength;
 260         }
 261 }
 262
 263 static inline void display_2( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 264 {
 265         // Generate the affine transform scaling values
 266         int scale_width = ( width << 16 ) / rect.w;
 267         int scale_height = ( height << 16 ) / rect.h;
 268         int stride = width * 3;
 269         int x, y, row_index;
 270         uint8_t *q, *row;
 271
 272         // Constants defined for clarity and optimisation
 273         int scanlength = screen->pitch / 2;
 274         uint16_t *start = ( uint16_t * )screen->pixels + rect.y * scanlength + rect.x;
 275         uint16_t *p;
 276
 277         // Iterate through the screen using a very basic scaling algorithm
 278         for ( y = 0; y < rect.h; y ++ )
 279         {
 280                 p = start;
 281                 row_index = ( scale_height * y ) >> 16;
 282                 row = image + stride * row_index;
 283                 for ( x = 0; x < rect.w; x ++ )
 284                 {
 285                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 286                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 287                 }
 288                 start += scanlength;
 289         }
 290 }
 291
 292 static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 293 {
 294         // Generate the affine transform scaling values
 295         int scale_width = ( width << 16 ) / rect.w;
 296         int scale_height = ( height << 16 ) / rect.h;
 297         int stride = width * 3;
 298         int x, y, row_index;
 299         uint8_t *q, *row;
 300
 301         // Constants defined for clarity and optimisation
 302         int scanlength = screen->pitch;
 303         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 304         uint8_t *p;
 305         uint32_t pixel;
 306
 307         // Iterate through the screen using a very basic scaling algorithm
 308         for ( y = 0; y < rect.h; y ++ )
 309         {
 310                 p = start;
 311                 row_index = ( scale_height * y ) >> 16;
 312                 row = image + stride * row_index;
 313                 for ( x = 0; x < rect.w; x ++ )
 314                 {
 315                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 316                         pixel = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 317                         *p ++ = (pixel & 0xFF0000) >> 16;
 318                         *p ++ = (pixel & 0x00FF00) >> 8;
 319                         *p ++ = (pixel & 0x0000FF);
 320                 }
 321                 start += scanlength;
 322         }
 323 }
 324
 325 static inline void display_4( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 326 {
 327         // Generate the affine transform scaling values
 328         int scale_width = ( width << 16 ) / rect.w;
 329         int scale_height = ( height << 16 ) / rect.h;
 330         int stride = width * 3;
 331         int x, y, row_index;
 332         uint8_t *q, *row;
 333
 334         // Constants defined for clarity and optimisation
 335         int scanlength = screen->pitch / 4;
 336         uint32_t *start = ( uint32_t * )screen->pixels + rect.y * scanlength + rect.x;
 337         uint32_t *p;
 338
 339         // Iterate through the screen using a very basic scaling algorithm
 340         for ( y = 0; y < rect.h; y ++ )
 341         {
 342                 p = start;
 343                 row_index = ( scale_height * y ) >> 16;
 344                 row = image + stride * row_index;
 345                 for ( x = 0; x < rect.w; x ++ )
 346                 {
 347                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 348                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 349                 }
 350                 start += scanlength;
 351         }
 352 }
 353
 354 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 355 {
 356         // Get the properties of this consumer
 357         mlt_properties properties = this->properties;
 358
 359         mlt_image_format vfmt = mlt_image_rgb24;
 360         int height = this->height;
 361         int width = this->width;
 362         uint8_t *image = NULL;
 363         int changed = 0;
 364
 365         void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 366         void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 367
 368         if ( lock != NULL ) lock( );
 369
 370         sdl_lock_display();
 371
 372         // Handle events
 373         if ( this->sdl_screen != NULL )
 374         {
 375                 SDL_Event event;
 376
 377                 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 378
 379                 while ( SDL_PollEvent( &event ) )
 380                 {
 381                         mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 382
 383                         switch( event.type )
 384                         {
 385                                 case SDL_VIDEORESIZE:
 386                                         this->window_width = event.resize.w;
 387                                         this->window_height = event.resize.h;
 388                                         changed = 1;
 389                                         break;
 390                                 case SDL_QUIT:
 391                                         this->running = 0;
 392                                         break;
 393                                 case SDL_KEYDOWN:
 394                                         {
 395                                                 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 396                                                 char keyboard[ 2 ] = " ";
 397                                                 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 398                                                 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 399                                                 {
 400                                                         keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 401                                                         callback( producer, keyboard );
 402                                                 }
 403                                         }
 404                                         break;
 405                         }
 406                 }
 407         }
 408
 409         if ( this->sdl_screen == NULL || changed || mlt_properties_get_int( properties, "changed" ) == 2 )
 410         {
 411                 // open SDL window
 412                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 413                 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 414                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 415
 416                 changed = 1;
 417                 mlt_properties_set_int( properties, "changed", 0 );
 418         }
 419         else
 420         {
 421                 changed = 1;
 422                 mlt_properties_set_int( properties, "changed", 0 );
 423         }
 424
 425         if ( changed == 0 &&
 426                  this->last_position == mlt_frame_get_position( frame ) &&
 427                  this->last_producer == mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL ) )
 428         {
 429                 sdl_unlock_display( );
 430                 if ( unlock != NULL )
 431                         unlock( );
 432                 return 0;
 433         }
 434
 435         // Update last frame shown info
 436         this->last_position = mlt_frame_get_position( frame );
 437         this->last_producer = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL );
 438
 439         // Get the image, width and height
 440         if ( image == NULL )
 441         {
 442                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 443
 444                 // I would like to provide upstream scaling here, but this is incorrect
 445                 // Something? (or everything?) is too sensitive to aspect ratio
 446                 //width = this->rect.w;
 447                 //height = this->rect.h;
 448                 //mlt_properties_set( MLT_FRAME_PROPERTIES( frame ), "distort", "true" );
 449                 //mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "normalised_width", width );
 450                 //mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "normalised_height", height );
 451
 452                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 453         }
 454
 455         if ( image != NULL )
 456         {
 457                 char *rescale = mlt_properties_get( properties, "rescale" );
 458                 if ( rescale != NULL && strcmp( rescale, "none" ) )
 459                 {
 460                         float this_aspect = this->display_aspect / ( ( float )this->window_width / ( float )this->window_height );
 461                         this->rect.w = this_aspect * this->window_width;
 462                         this->rect.h = this->window_height;
 463                         if ( this->rect.w > this->window_width )
 464                         {
 465                                 this->rect.w = this->window_width;
 466                                 this->rect.h = ( 1.0 / this_aspect ) * this->window_height;
 467                         }
 468                 }
 469                 else
 470                 {
 471                         float frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 472                         this->rect.w = frame_aspect * this->window_height;
 473                         this->rect.h = this->window_height;
 474                         if ( this->rect.w > this->window_width )
 475                         {
 476                                 this->rect.w = this->window_width;
 477                                 this->rect.h = ( 1.0 / frame_aspect ) * this->window_width;
 478                         }
 479                 }
 480
 481                 this->rect.x = ( this->window_width - this->rect.w ) / 2;
 482                 this->rect.y = ( this->window_height - this->rect.h ) / 2;
 483
 484                 mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 485                 mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 486                 mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 487                 mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 488         }
 489
 490         if ( !mlt_consumer_is_stopped( &this->parent ) && SDL_GetVideoSurface( ) != NULL && this->sdl_screen != NULL && this->sdl_screen->pixels != NULL )
 491         {
 492                 memset( this->sdl_screen->pixels, 0, this->window_width * this->window_height * this->sdl_screen->format->BytesPerPixel );
 493
 494                 switch( this->sdl_screen->format->BytesPerPixel )
 495                 {
 496                         case 1:
 497                                 display_1( this->sdl_screen, this->rect, image, width, height );
 498                                 break;
 499                         case 2:
 500                                 display_2( this->sdl_screen, this->rect, image, width, height );
 501                                 break;
 502                         case 3:
 503                                 display_3( this->sdl_screen, this->rect, image, width, height );
 504                                 break;
 505                         case 4:
 506                                 display_4( this->sdl_screen, this->rect, image, width, height );
 507                                 break;
 508                         default:
 509                                 fprintf( stderr, "Unsupported video depth %d\n", this->sdl_screen->format->BytesPerPixel );
 510                                 break;
 511                 }
 512
 513                 // Flip it into sight
 514                 SDL_Flip( this->sdl_screen );
 515         }
 516
 517         sdl_unlock_display();
 518
 519         if ( unlock != NULL ) unlock( );
 520
 521         return 1;
 522 }
 523
 524 /** Threaded wrapper for pipe.
 525 */
 526
 527 static void *consumer_thread( void *arg )
 528 {
 529         // Identify the arg
 530         consumer_sdl this = arg;
 531
 532         // Get the consumer
 533         mlt_consumer consumer = &this->parent;
 534
 535         // internal intialization
 536         mlt_frame frame = NULL;
 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                         consumer_play_video( this, frame );
 570                         mlt_frame_close( frame );
 571                 }
 572                 else
 573                 {
 574                         this->running = 0;
 575                 }
 576         }
 577
 578         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "sdl_started" ) == 0 )
 579                 SDL_Quit( );
 580
 581         this->sdl_screen = NULL;
 582
 583         return NULL;
 584 }
 585
 586 static int consumer_get_dimensions( int *width, int *height )
 587 {
 588         int changed = 0;
 589
 590         // SDL windows manager structure
 591         SDL_SysWMinfo wm;
 592
 593         // Specify the SDL Version
 594         SDL_VERSION( &wm.version );
 595
 596         // Get the wm structure
 597         if ( SDL_GetWMInfo( &wm ) == 1 )
 598         {
 599                 // Check that we have the X11 wm
 600                 if ( wm.subsystem == SDL_SYSWM_X11 )
 601                 {
 602                         // Get the SDL window
 603                         Window window = wm.info.x11.window;
 604
 605                         // Get the display session
 606                         Display *display = wm.info.x11.display;
 607
 608                         // Get the window attributes
 609                         XWindowAttributes attr;
 610                         XGetWindowAttributes( display, window, &attr );
 611
 612                         // Determine whether window has changed
 613                         changed = *width != attr.width || *height != attr.height;
 614
 615                         // Return width and height
 616                         *width = attr.width;
 617                         *height = attr.height;
 618                 }
 619         }
 620
 621         return changed;
 622 }
 623
 624 /** Callback to allow override of the close method.
 625 */
 626
 627 static void consumer_close( mlt_consumer parent )
 628 {
 629         // Get the actual object
 630         consumer_sdl this = parent->child;
 631
 632         // Stop the consumer
 633         mlt_consumer_stop( parent );
 634
 635         // Now clean up the rest
 636         mlt_consumer_close( parent );
 637
 638         // Finally clean up this
 639         free( this );
 640 }