2 * consumer_sdl_still.c -- A Simple DirectMedia Layer consumer
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates
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.
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.
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.
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>
31 #include <SDL/SDL_syswm.h>
34 /** This classes definition.
37 typedef struct consumer_sdl_s *consumer_sdl;
41 struct mlt_consumer_s parent;
42 mlt_properties properties;
52 SDL_Surface *sdl_screen;
56 mlt_producer last_producer;
60 /** Forward references to static functions.
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 );
71 /** This is what will be called by the factory - anything can be passed in
72 via the argument, but keep it simple.
75 mlt_consumer consumer_sdl_still_init( char *arg )
77 // Create the consumer object
78 consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
80 // If no malloc'd and consumer init ok
81 if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
83 // Get the parent consumer object
84 mlt_consumer parent = &this->parent;
86 // get a handle on properties
87 mlt_service service = MLT_CONSUMER_SERVICE( parent );
88 this->properties = MLT_SERVICE_PROPERTIES( service );
90 // Get the default display ratio
91 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
93 // We have stuff to clean up, so override the close method
94 parent->close = consumer_close;
96 // Default scaler (for now we'll use nearest)
97 mlt_properties_set( this->properties, "rescale", "nearest" );
99 // We're always going to run this in non-realtime mode
100 mlt_properties_set( this->properties, "real_time", "0" );
102 // Default progressive true
103 mlt_properties_set_int( this->properties, "progressive", 1 );
105 // Ensure we don't join on a non-running object
108 // process actual param
109 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
111 this->width = mlt_properties_get_int( this->properties, "width" );
112 this->height = mlt_properties_get_int( this->properties, "height" );
115 // Default window size
116 this->window_width = ( double )this->height * display_ratio;
117 this->window_height = this->height;
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;
124 // Allow thread to be started/stopped
125 parent->start = consumer_start;
126 parent->stop = consumer_stop;
127 parent->is_stopped = consumer_is_stopped;
129 // Register specific events
130 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
132 // Return the consumer produced
136 // malloc or consumer init failed
143 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
145 if ( listener != NULL )
146 listener( owner, this, ( SDL_Event * )args[ 0 ] );
149 static int consumer_start( mlt_consumer parent )
151 consumer_sdl this = parent->child;
153 if ( !this->running )
155 // Attach a colour space converter
156 if ( !this->filtered )
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 );
165 consumer_stop( parent );
167 this->last_position = -1;
171 // Allow the user to force resizing to window size
172 if ( mlt_properties_get_int( this->properties, "resize" ) )
174 mlt_properties_set_int( this->properties, "width", this->width );
175 mlt_properties_set_int( this->properties, "height", this->height );
178 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
180 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
182 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
186 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
187 SDL_EnableUNICODE( 1 );
191 mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( parent ), "changed", 2 );
192 if ( SDL_GetVideoSurface( ) != NULL )
194 this->sdl_screen = SDL_GetVideoSurface( );
195 consumer_get_dimensions( &this->window_width, &this->window_height );
196 mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( parent ), "changed", 0 );
200 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
202 pthread_create( &this->thread, NULL, consumer_thread, this );
208 static int consumer_stop( mlt_consumer parent )
210 // Get the actual object
211 consumer_sdl this = parent->child;
213 if ( this->joined == 0 )
215 // Kill the thread and clean up
218 pthread_join( this->thread, NULL );
221 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
224 this->sdl_screen = NULL;
230 static int consumer_is_stopped( mlt_consumer parent )
232 consumer_sdl this = parent->child;
233 return !this->running;
236 static int sdl_lock_display( )
238 SDL_Surface *screen = SDL_GetVideoSurface( );
239 return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
242 static void sdl_unlock_display( )
244 SDL_Surface *screen = SDL_GetVideoSurface( );
245 if ( screen != NULL && SDL_MUSTLOCK( screen ) )
246 SDL_UnlockSurface( screen );
249 static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
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;
258 // Constants defined for clarity and optimisation
259 int scanlength = screen->pitch;
260 uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
263 // Iterate through the screen using a very basic scaling algorithm
264 for ( y = 0; y < rect.h; y ++ )
267 row_index = ( scale_height * y ) >> 16;
268 row = image + stride * row_index;
269 for ( x = 0; x < rect.w; x ++ )
271 q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
272 *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
278 static inline void display_2( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
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;
287 // Constants defined for clarity and optimisation
288 int scanlength = screen->pitch / 2;
289 uint16_t *start = ( uint16_t * )screen->pixels + rect.y * scanlength + rect.x;
292 // Iterate through the screen using a very basic scaling algorithm
293 for ( y = 0; y < rect.h; y ++ )
296 row_index = ( scale_height * y ) >> 16;
297 row = image + stride * row_index;
298 for ( x = 0; x < rect.w; x ++ )
300 q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
301 *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
307 static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
309 // Generate the affine transform scaling values
310 int scale_width = ( width << 16 ) / rect.w;
311 int scale_height = ( height << 16 ) / rect.h;
312 int stride = width * 3;
316 // Constants defined for clarity and optimisation
317 int scanlength = screen->pitch;
318 uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
322 // Iterate through the screen using a very basic scaling algorithm
323 for ( y = 0; y < rect.h; y ++ )
326 row_index = ( scale_height * y ) >> 16;
327 row = image + stride * row_index;
328 for ( x = 0; x < rect.w; x ++ )
330 q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
331 pixel = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
332 *p ++ = (pixel & 0xFF0000) >> 16;
333 *p ++ = (pixel & 0x00FF00) >> 8;
334 *p ++ = (pixel & 0x0000FF);
340 static inline void display_4( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
342 // Generate the affine transform scaling values
343 int scale_width = ( width << 16 ) / rect.w;
344 int scale_height = ( height << 16 ) / rect.h;
345 int stride = width * 3;
349 // Constants defined for clarity and optimisation
350 int scanlength = screen->pitch / 4;
351 uint32_t *start = ( uint32_t * )screen->pixels + rect.y * scanlength + rect.x;
354 // Iterate through the screen using a very basic scaling algorithm
355 for ( y = 0; y < rect.h; y ++ )
358 row_index = ( scale_height * y ) >> 16;
359 row = image + stride * row_index;
360 for ( x = 0; x < rect.w; x ++ )
362 q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
363 *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
369 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
371 // Get the properties of this consumer
372 mlt_properties properties = this->properties;
374 mlt_image_format vfmt = mlt_image_rgb24;
375 int height = this->height;
376 int width = this->width;
377 uint8_t *image = NULL;
379 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
381 void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
382 void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
384 if ( lock != NULL ) lock( );
389 if ( this->sdl_screen != NULL )
393 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
395 while ( SDL_PollEvent( &event ) )
397 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
401 case SDL_VIDEORESIZE:
402 this->window_width = event.resize.w;
403 this->window_height = event.resize.h;
411 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
412 char keyboard[ 2 ] = " ";
413 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
414 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
416 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
417 callback( producer, keyboard );
425 if ( this->sdl_screen == NULL || changed || mlt_properties_get_int( properties, "changed" ) == 2 )
428 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
429 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
430 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
433 mlt_properties_set_int( properties, "changed", 0 );
438 mlt_properties_set_int( properties, "changed", 0 );
442 this->last_position == mlt_frame_get_position( frame ) &&
443 this->last_producer == mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL ) )
445 sdl_unlock_display( );
446 if ( unlock != NULL )
451 // Update last frame shown info
452 this->last_position = mlt_frame_get_position( frame );
453 this->last_producer = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL );
455 // Get the image, width and height
456 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
457 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
461 char *rescale = mlt_properties_get( properties, "rescale" );
462 if ( rescale != NULL && strcmp( rescale, "none" ) )
464 double this_aspect = display_ratio / ( ( double )this->window_width / ( double )this->window_height );
465 this->rect.w = this_aspect * this->window_width;
466 this->rect.h = this->window_height;
467 if ( this->rect.w > this->window_width )
469 this->rect.w = this->window_width;
470 this->rect.h = ( 1.0 / this_aspect ) * this->window_height;
475 double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
476 this->rect.w = frame_aspect * this->window_height;
477 this->rect.h = this->window_height;
478 if ( this->rect.w > this->window_width )
480 this->rect.w = this->window_width;
481 this->rect.h = ( 1.0 / frame_aspect ) * this->window_width;
485 this->rect.x = ( this->window_width - this->rect.w ) / 2;
486 this->rect.y = ( this->window_height - this->rect.h ) / 2;
488 mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
489 mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
490 mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
491 mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
494 if ( !mlt_consumer_is_stopped( &this->parent ) && SDL_GetVideoSurface( ) != NULL && this->sdl_screen != NULL && this->sdl_screen->pixels != NULL )
496 memset( this->sdl_screen->pixels, 0, this->window_width * this->window_height * this->sdl_screen->format->BytesPerPixel );
498 switch( this->sdl_screen->format->BytesPerPixel )
501 display_1( this->sdl_screen, this->rect, image, width, height );
504 display_2( this->sdl_screen, this->rect, image, width, height );
507 display_3( this->sdl_screen, this->rect, image, width, height );
510 display_4( this->sdl_screen, this->rect, image, width, height );
513 fprintf( stderr, "Unsupported video depth %d\n", this->sdl_screen->format->BytesPerPixel );
517 // Flip it into sight
518 SDL_Flip( this->sdl_screen );
521 sdl_unlock_display();
523 if ( unlock != NULL ) unlock( );
528 /** Threaded wrapper for pipe.
531 static void *consumer_thread( void *arg )
534 consumer_sdl this = arg;
537 mlt_consumer consumer = &this->parent;
539 // internal intialization
540 mlt_frame frame = NULL;
542 // Loop until told not to
543 while( this->running )
545 // Get a frame from the attached producer
546 frame = mlt_consumer_rt_frame( consumer );
548 // Ensure that we have a frame
549 if ( this->running && frame != NULL )
551 consumer_play_video( this, frame );
552 mlt_frame_close( frame );
556 if ( frame ) mlt_frame_close( frame );
564 static int consumer_get_dimensions( int *width, int *height )
568 // SDL windows manager structure
571 // Specify the SDL Version
572 SDL_VERSION( &wm.version );
574 // Get the wm structure
575 if ( SDL_GetWMInfo( &wm ) == 1 )
578 // Check that we have the X11 wm
579 if ( wm.subsystem == SDL_SYSWM_X11 )
581 // Get the SDL window
582 Window window = wm.info.x11.window;
584 // Get the display session
585 Display *display = wm.info.x11.display;
587 // Get the window attributes
588 XWindowAttributes attr;
589 XGetWindowAttributes( display, window, &attr );
591 // Determine whether window has changed
592 changed = *width != attr.width || *height != attr.height;
594 // Return width and height
596 *height = attr.height;
604 /** Callback to allow override of the close method.
607 static void consumer_close( mlt_consumer parent )
609 // Get the actual object
610 consumer_sdl this = parent->child;
613 mlt_consumer_stop( parent );
615 // Now clean up the rest
616 mlt_consumer_close( parent );
618 // Finally clean up this