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
;
122 // Allow thread to be started/stopped
123 parent
->start
= consumer_start
;
124 parent
->stop
= consumer_stop
;
125 parent
->is_stopped
= consumer_is_stopped
;
127 // Register specific events
128 mlt_events_register( this->properties
, "consumer-sdl-event", ( mlt_transmitter
)consumer_sdl_event
);
130 // Return the consumer produced
134 // malloc or consumer init failed
141 static void consumer_sdl_event( mlt_listener listener
, mlt_properties owner
, mlt_service
this, void **args
)
143 if ( listener
!= NULL
)
144 listener( owner
, this, ( SDL_Event
* )args
[ 0 ] );
147 static int consumer_start( mlt_consumer parent
)
149 consumer_sdl
this = parent
->child
;
151 if ( !this->running
)
153 // Attach a colour space converter
154 if ( !this->filtered
)
156 mlt_filter filter
= mlt_factory_filter( "avcolour_space", NULL
);
157 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter
), "forced", mlt_image_yuv422
);
158 mlt_service_attach( MLT_CONSUMER_SERVICE( parent
), filter
);
159 mlt_filter_close( filter
);
163 consumer_stop( parent
);
165 this->last_position
= -1;
169 // Allow the user to force resizing to window size
170 if ( mlt_properties_get_int( this->properties
, "resize" ) )
172 mlt_properties_set_int( this->properties
, "width", this->width
);
173 mlt_properties_set_int( this->properties
, "height", this->height
);
176 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent
), "sdl_started" ) == 0 )
178 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_NOPARACHUTE
) < 0 )
180 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
184 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
185 SDL_EnableUNICODE( 1 );
189 if ( SDL_GetVideoSurface( ) != NULL
)
191 this->sdl_screen
= SDL_GetVideoSurface( );
192 consumer_get_dimensions( &this->window_width
, &this->window_height
);
196 if ( this->sdl_screen
== NULL
)
197 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
199 pthread_create( &this->thread
, NULL
, consumer_thread
, this );
205 static int consumer_stop( mlt_consumer parent
)
207 // Get the actual object
208 consumer_sdl
this = parent
->child
;
210 if ( this->joined
== 0 )
212 // Kill the thread and clean up
215 pthread_join( this->thread
, NULL
);
218 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent
), "sdl_started" ) == 0 )
221 this->sdl_screen
= NULL
;
227 static int consumer_is_stopped( mlt_consumer parent
)
229 consumer_sdl
this = parent
->child
;
230 return !this->running
;
233 static int sdl_lock_display( )
235 SDL_Surface
*screen
= SDL_GetVideoSurface( );
236 return screen
!= NULL
&& ( !SDL_MUSTLOCK( screen
) || SDL_LockSurface( screen
) >= 0 );
239 static void sdl_unlock_display( )
241 SDL_Surface
*screen
= SDL_GetVideoSurface( );
242 if ( screen
!= NULL
&& SDL_MUSTLOCK( screen
) )
243 SDL_UnlockSurface( screen
);
246 static inline void display_1( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
248 // Generate the affine transform scaling values
249 int scale_width
= ( width
<< 16 ) / rect
.w
;
250 int scale_height
= ( height
<< 16 ) / rect
.h
;
251 int stride
= width
* 3;
255 // Constants defined for clarity and optimisation
256 int scanlength
= screen
->pitch
;
257 uint8_t *start
= ( uint8_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
260 // Iterate through the screen using a very basic scaling algorithm
261 for ( y
= 0; y
< rect
.h
; y
++ )
264 row_index
= ( scale_height
* y
) >> 16;
265 row
= image
+ stride
* row_index
;
266 for ( x
= 0; x
< rect
.w
; x
++ )
268 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
269 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
275 static inline void display_2( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
277 // Generate the affine transform scaling values
278 int scale_width
= ( width
<< 16 ) / rect
.w
;
279 int scale_height
= ( height
<< 16 ) / rect
.h
;
280 int stride
= width
* 3;
284 // Constants defined for clarity and optimisation
285 int scanlength
= screen
->pitch
/ 2;
286 uint16_t *start
= ( uint16_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
289 // Iterate through the screen using a very basic scaling algorithm
290 for ( y
= 0; y
< rect
.h
; y
++ )
293 row_index
= ( scale_height
* y
) >> 16;
294 row
= image
+ stride
* row_index
;
295 for ( x
= 0; x
< rect
.w
; x
++ )
297 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
298 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
304 static inline void display_3( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
306 // Generate the affine transform scaling values
307 int scale_width
= ( width
<< 16 ) / rect
.w
;
308 int scale_height
= ( height
<< 16 ) / rect
.h
;
309 int stride
= width
* 3;
313 // Constants defined for clarity and optimisation
314 int scanlength
= screen
->pitch
;
315 uint8_t *start
= ( uint8_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
319 // Iterate through the screen using a very basic scaling algorithm
320 for ( y
= 0; y
< rect
.h
; y
++ )
323 row_index
= ( scale_height
* y
) >> 16;
324 row
= image
+ stride
* row_index
;
325 for ( x
= 0; x
< rect
.w
; x
++ )
327 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
328 pixel
= SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
329 *p
++ = (pixel
& 0xFF0000) >> 16;
330 *p
++ = (pixel
& 0x00FF00) >> 8;
331 *p
++ = (pixel
& 0x0000FF);
337 static inline void display_4( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
339 // Generate the affine transform scaling values
340 int scale_width
= ( width
<< 16 ) / rect
.w
;
341 int scale_height
= ( height
<< 16 ) / rect
.h
;
342 int stride
= width
* 3;
346 // Constants defined for clarity and optimisation
347 int scanlength
= screen
->pitch
/ 4;
348 uint32_t *start
= ( uint32_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
351 // Iterate through the screen using a very basic scaling algorithm
352 for ( y
= 0; y
< rect
.h
; y
++ )
355 row_index
= ( scale_height
* y
) >> 16;
356 row
= image
+ stride
* row_index
;
357 for ( x
= 0; x
< rect
.w
; x
++ )
359 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
360 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
366 static int consumer_play_video( consumer_sdl
this, mlt_frame frame
)
368 // Get the properties of this consumer
369 mlt_properties properties
= this->properties
;
371 mlt_image_format vfmt
= mlt_image_rgb24
;
372 int height
= this->height
;
373 int width
= this->width
;
374 uint8_t *image
= NULL
;
376 double display_ratio
= mlt_properties_get_double( this->properties
, "display_ratio" );
378 void ( *lock
)( void ) = mlt_properties_get_data( properties
, "app_lock", NULL
);
379 void ( *unlock
)( void ) = mlt_properties_get_data( properties
, "app_unlock", NULL
);
381 if ( lock
!= NULL
) lock( );
386 if ( this->sdl_screen
!= NULL
)
390 changed
= consumer_get_dimensions( &this->window_width
, &this->window_height
);
392 while ( SDL_PollEvent( &event
) )
394 mlt_events_fire( this->properties
, "consumer-sdl-event", &event
, NULL
);
398 case SDL_VIDEORESIZE
:
399 this->window_width
= event
.resize
.w
;
400 this->window_height
= event
.resize
.h
;
408 mlt_producer producer
= mlt_properties_get_data( properties
, "transport_producer", NULL
);
409 char keyboard
[ 2 ] = " ";
410 void (*callback
)( mlt_producer
, char * ) = mlt_properties_get_data( properties
, "transport_callback", NULL
);
411 if ( callback
!= NULL
&& producer
!= NULL
&& event
.key
.keysym
.unicode
< 0x80 && event
.key
.keysym
.unicode
> 0 )
413 keyboard
[ 0 ] = ( char )event
.key
.keysym
.unicode
;
414 callback( producer
, keyboard
);
422 if ( this->sdl_screen
== NULL
|| changed
)
425 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
426 if ( consumer_get_dimensions( &this->window_width
, &this->window_height
) )
427 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
436 this->last_position
== mlt_frame_get_position( frame
) &&
437 this->last_producer
== mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame
), "_producer", NULL
) )
439 sdl_unlock_display( );
440 if ( unlock
!= NULL
)
445 // Update last frame shown info
446 this->last_position
= mlt_frame_get_position( frame
);
447 this->last_producer
= mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame
), "_producer", NULL
);
449 // Get the image, width and height
450 mlt_events_fire( properties
, "consumer-frame-show", frame
, NULL
);
451 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
455 char *rescale
= mlt_properties_get( properties
, "rescale" );
456 if ( rescale
!= NULL
&& strcmp( rescale
, "none" ) )
458 double this_aspect
= display_ratio
/ ( ( double )this->window_width
/ ( double )this->window_height
);
459 this->rect
.w
= this_aspect
* this->window_width
;
460 this->rect
.h
= this->window_height
;
461 if ( this->rect
.w
> this->window_width
)
463 this->rect
.w
= this->window_width
;
464 this->rect
.h
= ( 1.0 / this_aspect
) * this->window_height
;
469 double frame_aspect
= mlt_frame_get_aspect_ratio( frame
) * width
/ height
;
470 this->rect
.w
= frame_aspect
* this->window_height
;
471 this->rect
.h
= this->window_height
;
472 if ( this->rect
.w
> this->window_width
)
474 this->rect
.w
= this->window_width
;
475 this->rect
.h
= ( 1.0 / frame_aspect
) * this->window_width
;
479 this->rect
.x
= ( this->window_width
- this->rect
.w
) / 2;
480 this->rect
.y
= ( this->window_height
- this->rect
.h
) / 2;
482 mlt_properties_set_int( this->properties
, "rect_x", this->rect
.x
);
483 mlt_properties_set_int( this->properties
, "rect_y", this->rect
.y
);
484 mlt_properties_set_int( this->properties
, "rect_w", this->rect
.w
);
485 mlt_properties_set_int( this->properties
, "rect_h", this->rect
.h
);
488 if ( !mlt_consumer_is_stopped( &this->parent
) && SDL_GetVideoSurface( ) != NULL
&& this->sdl_screen
!= NULL
&& this->sdl_screen
->pixels
!= NULL
)
490 memset( this->sdl_screen
->pixels
, 0, this->window_width
* this->window_height
* this->sdl_screen
->format
->BytesPerPixel
);
492 switch( this->sdl_screen
->format
->BytesPerPixel
)
495 display_1( this->sdl_screen
, this->rect
, image
, width
, height
);
498 display_2( this->sdl_screen
, this->rect
, image
, width
, height
);
501 display_3( this->sdl_screen
, this->rect
, image
, width
, height
);
504 display_4( this->sdl_screen
, this->rect
, image
, width
, height
);
507 fprintf( stderr
, "Unsupported video depth %d\n", this->sdl_screen
->format
->BytesPerPixel
);
511 // Flip it into sight
512 SDL_Flip( this->sdl_screen
);
515 sdl_unlock_display();
517 if ( unlock
!= NULL
) unlock( );
522 /** Threaded wrapper for pipe.
525 static void *consumer_thread( void *arg
)
528 consumer_sdl
this = arg
;
531 mlt_consumer consumer
= &this->parent
;
533 // internal intialization
534 mlt_frame frame
= NULL
;
536 // Loop until told not to
537 while( this->running
)
539 // Get a frame from the attached producer
540 frame
= mlt_consumer_rt_frame( consumer
);
542 // Ensure that we have a frame
543 if ( this->running
&& frame
!= NULL
)
545 consumer_play_video( this, frame
);
546 mlt_frame_close( frame
);
550 if ( frame
) mlt_frame_close( frame
);
558 static int consumer_get_dimensions( int *width
, int *height
)
562 // SDL windows manager structure
565 // Specify the SDL Version
566 SDL_VERSION( &wm
.version
);
568 // Get the wm structure
569 if ( SDL_GetWMInfo( &wm
) == 1 )
572 // Check that we have the X11 wm
573 if ( wm
.subsystem
== SDL_SYSWM_X11
)
575 // Get the SDL window
576 Window window
= wm
.info
.x11
.window
;
578 // Get the display session
579 Display
*display
= wm
.info
.x11
.display
;
581 // Get the window attributes
582 XWindowAttributes attr
;
583 XGetWindowAttributes( display
, window
, &attr
);
585 // Determine whether window has changed
586 changed
= *width
!= attr
.width
|| *height
!= attr
.height
;
588 // Return width and height
590 *height
= attr
.height
;
598 /** Callback to allow override of the close method.
601 static void consumer_close( mlt_consumer parent
)
603 // Get the actual object
604 consumer_sdl
this = parent
->child
;
607 mlt_consumer_stop( parent
);
609 // Now clean up the rest
610 mlt_consumer_close( parent
);
612 // Finally clean up this