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
;
50 double last_frame_aspect
;
55 SDL_Surface
*sdl_screen
;
59 mlt_producer last_producer
;
62 /** Forward references to static functions.
65 static int consumer_start( mlt_consumer parent
);
66 static int consumer_stop( mlt_consumer parent
);
67 static int consumer_is_stopped( mlt_consumer parent
);
68 static void consumer_close( mlt_consumer parent
);
69 static void *consumer_thread( void * );
70 static int consumer_get_dimensions( int *width
, int *height
);
71 static void consumer_sdl_event( mlt_listener listener
, mlt_properties owner
, mlt_service
this, void **args
);
73 /** This is what will be called by the factory - anything can be passed in
74 via the argument, but keep it simple.
77 mlt_consumer
consumer_sdl_still_init( char *arg
)
79 // Create the consumer object
80 consumer_sdl
this = calloc( sizeof( struct consumer_sdl_s
), 1 );
82 // If no malloc'd and consumer init ok
83 if ( this != NULL
&& mlt_consumer_init( &this->parent
, this ) == 0 )
85 // Get the parent consumer object
86 mlt_consumer parent
= &this->parent
;
88 // Attach a colour space converter
89 mlt_filter filter
= mlt_factory_filter( "avcolour_space", NULL
);
90 mlt_properties_set_int( mlt_filter_properties( filter
), "forced", mlt_image_yuv422
);
91 mlt_service_attach( mlt_consumer_service( &this->parent
), filter
);
92 mlt_filter_close( filter
);
94 // We have stuff to clean up, so override the close method
95 parent
->close
= consumer_close
;
97 // get a handle on properties
98 mlt_service service
= mlt_consumer_service( parent
);
99 this->properties
= mlt_service_properties( service
);
101 // Default scaler (for now we'll use nearest)
102 mlt_properties_set( this->properties
, "rescale", "nearest" );
104 // We're always going to run this in non-realtime mode
105 mlt_properties_set( this->properties
, "real_time", "0" );
107 // Default progressive true
108 mlt_properties_set_int( this->properties
, "progressive", 1 );
110 // Get sample aspect ratio
111 this->aspect_ratio
= mlt_properties_get_double( this->properties
, "aspect_ratio" );
113 // Ensure we don't join on a non-running object
116 // Default display aspect ratio
117 this->display_aspect
= 4.0 / 3.0;
119 // process actual param
120 if ( arg
== NULL
|| sscanf( arg
, "%dx%d", &this->width
, &this->height
) != 2 )
122 this->width
= mlt_properties_get_int( this->properties
, "width" );
123 this->height
= mlt_properties_get_int( this->properties
, "height" );
126 // Default window size
127 this->window_width
= ( float )this->height
* this->display_aspect
;
128 this->window_height
= this->height
;
131 this->sdl_flags
= SDL_HWSURFACE
| SDL_ASYNCBLIT
| SDL_HWACCEL
| SDL_RESIZABLE
| SDL_DOUBLEBUF
;
133 // Allow thread to be started/stopped
134 parent
->start
= consumer_start
;
135 parent
->stop
= consumer_stop
;
136 parent
->is_stopped
= consumer_is_stopped
;
138 // Register specific events
139 mlt_events_register( this->properties
, "consumer-sdl-event", ( mlt_transmitter
)consumer_sdl_event
);
141 // Return the consumer produced
145 // malloc or consumer init failed
152 static void consumer_sdl_event( mlt_listener listener
, mlt_properties owner
, mlt_service
this, void **args
)
154 if ( listener
!= NULL
)
155 listener( owner
, this, ( SDL_Event
* )args
[ 0 ] );
158 static int consumer_start( mlt_consumer parent
)
160 consumer_sdl
this = parent
->child
;
162 if ( !this->running
)
164 pthread_attr_t thread_attributes
;
166 consumer_stop( parent
);
168 this->last_position
= -1;
172 // Allow the user to force resizing to window size
173 if ( mlt_properties_get_int( this->properties
, "resize" ) )
175 mlt_properties_set_int( this->properties
, "width", this->width
);
176 mlt_properties_set_int( this->properties
, "height", this->height
);
179 //this->width = this->height * this->display_aspect;
181 // Inherit the scheduling priority
182 pthread_attr_init( &thread_attributes
);
183 pthread_attr_setinheritsched( &thread_attributes
, PTHREAD_INHERIT_SCHED
);
185 pthread_create( &this->thread
, &thread_attributes
, consumer_thread
, this );
191 static int consumer_stop( mlt_consumer parent
)
193 // Get the actual object
194 consumer_sdl
this = parent
->child
;
196 if ( this->joined
== 0 )
198 // Kill the thread and clean up
201 pthread_join( this->thread
, NULL
);
208 static int consumer_is_stopped( mlt_consumer parent
)
210 consumer_sdl
this = parent
->child
;
211 return !this->running
;
214 static int sdl_lock_display( )
216 SDL_Surface
*screen
= SDL_GetVideoSurface( );
217 return screen
!= NULL
&& ( !SDL_MUSTLOCK( screen
) || SDL_LockSurface( screen
) >= 0 );
220 static void sdl_unlock_display( )
222 SDL_Surface
*screen
= SDL_GetVideoSurface( );
223 if ( screen
!= NULL
&& SDL_MUSTLOCK( screen
) )
224 SDL_UnlockSurface( screen
);
227 static inline void display_1( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
229 // Generate the affine transform scaling values
230 int scale_width
= ( width
<< 16 ) / rect
.w
;
231 int scale_height
= ( height
<< 16 ) / rect
.h
;
232 int stride
= width
* 3;
236 // Constants defined for clarity and optimisation
237 int scanlength
= screen
->pitch
;
238 uint8_t *start
= ( uint8_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
241 // Iterate through the screen using a very basic scaling algorithm
242 for ( y
= 0; y
< rect
.h
; y
++ )
245 row_index
= ( scale_height
* y
) >> 16;
246 row
= image
+ stride
* row_index
;
247 for ( x
= 0; x
< rect
.w
; x
++ )
249 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
250 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
256 static inline void display_2( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
258 // Generate the affine transform scaling values
259 int scale_width
= ( width
<< 16 ) / rect
.w
;
260 int scale_height
= ( height
<< 16 ) / rect
.h
;
261 int stride
= width
* 3;
265 // Constants defined for clarity and optimisation
266 int scanlength
= screen
->pitch
/ 2;
267 uint16_t *start
= ( uint16_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
270 // Iterate through the screen using a very basic scaling algorithm
271 for ( y
= 0; y
< rect
.h
; y
++ )
274 row_index
= ( scale_height
* y
) >> 16;
275 row
= image
+ stride
* row_index
;
276 for ( x
= 0; x
< rect
.w
; x
++ )
278 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
279 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
285 static inline void display_3( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
287 // Generate the affine transform scaling values
288 int scale_width
= ( width
<< 16 ) / rect
.w
;
289 int scale_height
= ( height
<< 16 ) / rect
.h
;
290 int stride
= width
* 3;
294 // Constants defined for clarity and optimisation
295 int scanlength
= screen
->pitch
;
296 uint8_t *start
= ( uint8_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
300 // Iterate through the screen using a very basic scaling algorithm
301 for ( y
= 0; y
< rect
.h
; y
++ )
304 row_index
= ( scale_height
* y
) >> 16;
305 row
= image
+ stride
* row_index
;
306 for ( x
= 0; x
< rect
.w
; x
++ )
308 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
309 pixel
= SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
310 *p
++ = (pixel
& 0xFF0000) >> 16;
311 *p
++ = (pixel
& 0x00FF00) >> 8;
312 *p
++ = (pixel
& 0x0000FF);
318 static inline void display_4( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
320 // Generate the affine transform scaling values
321 int scale_width
= ( width
<< 16 ) / rect
.w
;
322 int scale_height
= ( height
<< 16 ) / rect
.h
;
323 int stride
= width
* 3;
327 // Constants defined for clarity and optimisation
328 int scanlength
= screen
->pitch
/ 4;
329 uint32_t *start
= ( uint32_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
332 // Iterate through the screen using a very basic scaling algorithm
333 for ( y
= 0; y
< rect
.h
; y
++ )
336 row_index
= ( scale_height
* y
) >> 16;
337 row
= image
+ stride
* row_index
;
338 for ( x
= 0; x
< rect
.w
; x
++ )
340 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
341 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
347 static int consumer_play_video( consumer_sdl
this, mlt_frame frame
)
349 // Get the properties of this consumer
350 mlt_properties properties
= this->properties
;
352 mlt_image_format vfmt
= mlt_image_rgb24
;
353 int height
= this->height
;
354 int width
= this->width
;
355 uint8_t *image
= NULL
;
358 void ( *lock
)( void ) = mlt_properties_get_data( properties
, "app_lock", NULL
);
359 void ( *unlock
)( void ) = mlt_properties_get_data( properties
, "app_unlock", NULL
);
361 if ( lock
!= NULL
) lock( );
366 if ( this->sdl_screen
!= NULL
)
370 changed
= consumer_get_dimensions( &this->window_width
, &this->window_height
);
372 while ( SDL_PollEvent( &event
) )
374 mlt_events_fire( this->properties
, "consumer-sdl-event", &event
, NULL
);
378 case SDL_VIDEORESIZE
:
379 this->window_width
= event
.resize
.w
;
380 this->window_height
= event
.resize
.h
;
388 mlt_producer producer
= mlt_properties_get_data( properties
, "transport_producer", NULL
);
389 char keyboard
[ 2 ] = " ";
390 void (*callback
)( mlt_producer
, char * ) = mlt_properties_get_data( properties
, "transport_callback", NULL
);
391 if ( callback
!= NULL
&& producer
!= NULL
&& event
.key
.keysym
.unicode
< 0x80 && event
.key
.keysym
.unicode
> 0 )
393 keyboard
[ 0 ] = ( char )event
.key
.keysym
.unicode
;
394 callback( producer
, keyboard
);
402 if ( this->sdl_screen
== NULL
|| changed
|| mlt_properties_get_int( properties
, "changed" ) == 2 )
405 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
406 if ( consumer_get_dimensions( &this->window_width
, &this->window_height
) )
407 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
410 mlt_properties_set_int( properties
, "changed", 0 );
414 changed
= mlt_properties_get_int( properties
, "changed" ) | mlt_properties_get_int( mlt_frame_properties( frame
), "refresh" );
415 mlt_properties_set_int( properties
, "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
) )
423 sdl_unlock_display( );
424 if ( unlock
!= NULL
)
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
);
433 // Get the image, width and height
436 mlt_events_fire( properties
, "consumer-frame-show", frame
, NULL
);
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 );
446 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
451 char *rescale
= mlt_properties_get( properties
, "rescale" );
452 if ( rescale
!= NULL
&& strcmp( rescale
, "none" ) )
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
)
459 this->rect
.w
= this->window_width
;
460 this->rect
.h
= ( 1.0 / this_aspect
) * this->window_height
;
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
)
470 this->rect
.w
= this->window_width
;
471 this->rect
.h
= ( 1.0 / frame_aspect
) * this->window_width
;
475 this->rect
.x
= ( this->window_width
- this->rect
.w
) / 2;
476 this->rect
.y
= ( this->window_height
- this->rect
.h
) / 2;
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
);
484 if ( this->sdl_screen
!= NULL
)
486 memset( this->sdl_screen
->pixels
, 0, this->window_width
* this->window_height
* this->sdl_screen
->format
->BytesPerPixel
);
488 switch( this->sdl_screen
->format
->BytesPerPixel
)
491 display_1( this->sdl_screen
, this->rect
, image
, width
, height
);
494 display_2( this->sdl_screen
, this->rect
, image
, width
, height
);
497 display_3( this->sdl_screen
, this->rect
, image
, width
, height
);
500 display_4( this->sdl_screen
, this->rect
, image
, width
, height
);
503 fprintf( stderr
, "Unsupported video depth %d\n", this->sdl_screen
->format
->BytesPerPixel
);
507 // Flip it into sight
508 SDL_Flip( this->sdl_screen
);
511 sdl_unlock_display();
513 if ( unlock
!= NULL
) unlock( );
518 /** Threaded wrapper for pipe.
521 static void *consumer_thread( void *arg
)
524 consumer_sdl
this = arg
;
527 mlt_consumer consumer
= &this->parent
;
529 // internal intialization
530 mlt_frame frame
= NULL
;
531 struct timespec tm
= { 0, 1000000 };
533 if ( mlt_properties_get_int( mlt_consumer_properties( consumer
), "sdl_started" ) == 0 )
535 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_NOPARACHUTE
) < 0 )
537 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
541 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
542 SDL_EnableUNICODE( 1 );
546 mlt_properties_set_int( mlt_consumer_properties( consumer
), "changed", 2 );
547 if ( SDL_GetVideoSurface( ) != NULL
)
549 this->sdl_screen
= SDL_GetVideoSurface( );
550 consumer_get_dimensions( &this->window_width
, &this->window_height
);
551 mlt_properties_set_int( mlt_consumer_properties( consumer
), "changed", 0 );
555 // Loop until told not to
556 while( this->running
)
558 // Get a frame from the attached producer
559 frame
= mlt_consumer_rt_frame( consumer
);
561 // Ensure that we have a frame
564 if ( consumer_play_video( this, frame
) == 0 )
565 nanosleep( &tm
, NULL
);
566 mlt_frame_close( frame
);
570 if ( mlt_properties_get_int( mlt_consumer_properties( consumer
), "sdl_started" ) == 0 )
573 this->sdl_screen
= NULL
;
578 static int consumer_get_dimensions( int *width
, int *height
)
582 // SDL windows manager structure
585 // Specify the SDL Version
586 SDL_VERSION( &wm
.version
);
588 // Get the wm structure
589 if ( SDL_GetWMInfo( &wm
) == 1 )
591 // Check that we have the X11 wm
592 if ( wm
.subsystem
== SDL_SYSWM_X11
)
594 // Get the SDL window
595 Window window
= wm
.info
.x11
.window
;
597 // Get the display session
598 Display
*display
= wm
.info
.x11
.display
;
600 // Get the window attributes
601 XWindowAttributes attr
;
602 XGetWindowAttributes( display
, window
, &attr
);
604 // Determine whether window has changed
605 changed
= *width
!= attr
.width
|| *height
!= attr
.height
;
607 // Return width and height
609 *height
= attr
.height
;
616 /** Callback to allow override of the close method.
619 static void consumer_close( mlt_consumer parent
)
621 // Get the actual object
622 consumer_sdl
this = parent
->child
;
625 mlt_consumer_stop( parent
);
627 // Now clean up the rest
628 mlt_consumer_close( parent
);
630 // Finally clean up this