2 * consumer_sdl_still.c -- A Simple DirectMedia Layer consumer
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, 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 // We have stuff to clean up, so override the close method
91 parent
->close
= consumer_close
;
93 // Default scaler (for now we'll use nearest)
94 mlt_properties_set( this->properties
, "rescale", "nearest" );
96 // We're always going to run this in non-realtime mode
97 mlt_properties_set( this->properties
, "real_time", "0" );
99 // Default progressive true
100 mlt_properties_set_int( this->properties
, "progressive", 1 );
102 // Ensure we don't join on a non-running object
105 // process actual param
106 if ( arg
== NULL
|| sscanf( arg
, "%dx%d", &this->width
, &this->height
) != 2 )
108 this->width
= mlt_properties_get_int( this->properties
, "width" );
109 this->height
= mlt_properties_get_int( this->properties
, "height" );
113 mlt_properties_set_int( this->properties
, "width", this->width
);
114 mlt_properties_set_int( this->properties
, "height", this->height
);
118 this->sdl_flags
= SDL_HWSURFACE
| SDL_ASYNCBLIT
| SDL_HWACCEL
| SDL_RESIZABLE
| SDL_DOUBLEBUF
;
120 // Allow thread to be started/stopped
121 parent
->start
= consumer_start
;
122 parent
->stop
= consumer_stop
;
123 parent
->is_stopped
= consumer_is_stopped
;
125 // Register specific events
126 mlt_events_register( this->properties
, "consumer-sdl-event", ( mlt_transmitter
)consumer_sdl_event
);
128 // Return the consumer produced
132 // malloc or consumer init failed
139 static void consumer_sdl_event( mlt_listener listener
, mlt_properties owner
, mlt_service
this, void **args
)
141 if ( listener
!= NULL
)
142 listener( owner
, this, ( SDL_Event
* )args
[ 0 ] );
145 static int consumer_start( mlt_consumer parent
)
147 consumer_sdl
this = parent
->child
;
149 if ( !this->running
)
151 int preview_off
= mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent
), "preview_off" );
152 int sdl_started
= mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent
), "sdl_started" );
154 // Attach a colour space converter
155 if ( !this->filtered
)
157 mlt_filter filter
= mlt_factory_filter( "avcolour_space", NULL
);
158 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter
), "forced", mlt_image_yuv422
);
159 mlt_service_attach( MLT_CONSUMER_SERVICE( parent
), filter
);
160 mlt_filter_close( filter
);
164 consumer_stop( parent
);
166 this->last_position
= -1;
170 // Allow the user to force resizing to window size
171 this->width
= mlt_properties_get_int( this->properties
, "width" );
172 this->height
= mlt_properties_get_int( this->properties
, "height" );
174 // Default window size
175 double display_ratio
= mlt_properties_get_double( this->properties
, "display_ratio" );
176 this->window_width
= ( double )this->height
* display_ratio
;
177 this->window_height
= this->height
;
179 if ( sdl_started
== 0 && preview_off
== 0 )
181 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_NOPARACHUTE
) < 0 )
183 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
187 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
188 SDL_EnableUNICODE( 1 );
190 else if ( preview_off
== 0 )
192 if ( SDL_GetVideoSurface( ) != NULL
)
194 this->sdl_screen
= SDL_GetVideoSurface( );
198 if ( this->sdl_screen
== NULL
&& preview_off
== 0 )
199 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
201 pthread_create( &this->thread
, NULL
, consumer_thread
, this );
207 static int consumer_stop( mlt_consumer parent
)
209 // Get the actual object
210 consumer_sdl
this = parent
->child
;
212 if ( this->joined
== 0 )
214 int preview_off
= mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent
), "preview_off" );
215 int sdl_started
= mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent
), "sdl_started" );
217 // Kill the thread and clean up
220 pthread_join( this->thread
, NULL
);
223 if ( sdl_started
== 0 && preview_off
== 0 )
226 this->sdl_screen
= NULL
;
232 static int consumer_is_stopped( mlt_consumer parent
)
234 consumer_sdl
this = parent
->child
;
235 return !this->running
;
238 static int sdl_lock_display( )
240 SDL_Surface
*screen
= SDL_GetVideoSurface( );
241 return screen
!= NULL
&& ( !SDL_MUSTLOCK( screen
) || SDL_LockSurface( screen
) >= 0 );
244 static void sdl_unlock_display( )
246 SDL_Surface
*screen
= SDL_GetVideoSurface( );
247 if ( screen
!= NULL
&& SDL_MUSTLOCK( screen
) )
248 SDL_UnlockSurface( screen
);
251 static inline void display_1( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
253 // Generate the affine transform scaling values
254 int scale_width
= ( width
<< 16 ) / rect
.w
;
255 int scale_height
= ( height
<< 16 ) / rect
.h
;
256 int stride
= width
* 3;
260 // Constants defined for clarity and optimisation
261 int scanlength
= screen
->pitch
;
262 uint8_t *start
= ( uint8_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
265 // Iterate through the screen using a very basic scaling algorithm
266 for ( y
= 0; y
< rect
.h
; y
++ )
269 row_index
= ( 32768 + scale_height
* y
) >> 16;
270 row
= image
+ stride
* row_index
;
271 for ( x
= 0; x
< rect
.w
; x
++ )
273 q
= row
+ ( ( ( 32768 + scale_width
* x
) >> 16 ) * 3 );
274 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
280 static inline void display_2( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
282 // Generate the affine transform scaling values
283 int scale_width
= ( width
<< 16 ) / rect
.w
;
284 int scale_height
= ( height
<< 16 ) / rect
.h
;
285 int stride
= width
* 3;
289 // Constants defined for clarity and optimisation
290 int scanlength
= screen
->pitch
/ 2;
291 uint16_t *start
= ( uint16_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
294 // Iterate through the screen using a very basic scaling algorithm
295 for ( y
= 0; y
< rect
.h
; y
++ )
298 row_index
= ( 32768 + scale_height
* y
) >> 16;
299 row
= image
+ stride
* row_index
;
300 for ( x
= 0; x
< rect
.w
; x
++ )
302 q
= row
+ ( ( ( 32768 + scale_width
* x
) >> 16 ) * 3 );
303 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
309 static inline void display_3( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
311 // Generate the affine transform scaling values
312 int scale_width
= ( width
<< 16 ) / rect
.w
;
313 int scale_height
= ( height
<< 16 ) / rect
.h
;
314 int stride
= width
* 3;
318 // Constants defined for clarity and optimisation
319 int scanlength
= screen
->pitch
;
320 uint8_t *start
= ( uint8_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
324 // Iterate through the screen using a very basic scaling algorithm
325 for ( y
= 0; y
< rect
.h
; y
++ )
328 row_index
= ( 32768 + scale_height
* y
) >> 16;
329 row
= image
+ stride
* row_index
;
330 for ( x
= 0; x
< rect
.w
; x
++ )
332 q
= row
+ ( ( ( 32768 + scale_width
* x
) >> 16 ) * 3 );
333 pixel
= SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
334 *p
++ = (pixel
& 0xFF0000) >> 16;
335 *p
++ = (pixel
& 0x00FF00) >> 8;
336 *p
++ = (pixel
& 0x0000FF);
342 static inline void display_4( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
344 // Generate the affine transform scaling values
345 int scale_width
= ( width
<< 16 ) / rect
.w
;
346 int scale_height
= ( height
<< 16 ) / rect
.h
;
347 int stride
= width
* 3;
351 // Constants defined for clarity and optimisation
352 int scanlength
= screen
->pitch
/ 4;
353 uint32_t *start
= ( uint32_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
356 // Iterate through the screen using a very basic scaling algorithm
357 for ( y
= 0; y
< rect
.h
; y
++ )
360 row_index
= ( 32768 + scale_height
* y
) >> 16;
361 row
= image
+ stride
* row_index
;
362 for ( x
= 0; x
< rect
.w
; x
++ )
364 q
= row
+ ( ( ( 32768 + scale_width
* x
) >> 16 ) * 3 );
365 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
371 static int consumer_play_video( consumer_sdl
this, mlt_frame frame
)
373 // Get the properties of this consumer
374 mlt_properties properties
= this->properties
;
376 mlt_image_format vfmt
= mlt_image_rgb24
;
377 int height
= this->height
;
378 int width
= this->width
;
379 uint8_t *image
= NULL
;
381 double display_ratio
= mlt_properties_get_double( this->properties
, "display_ratio" );
383 void ( *lock
)( void ) = mlt_properties_get_data( properties
, "app_lock", NULL
);
384 void ( *unlock
)( void ) = mlt_properties_get_data( properties
, "app_unlock", NULL
);
386 if ( lock
!= NULL
) lock( );
391 if ( this->sdl_screen
!= NULL
)
395 changed
= consumer_get_dimensions( &this->window_width
, &this->window_height
);
397 while ( SDL_PollEvent( &event
) )
399 mlt_events_fire( this->properties
, "consumer-sdl-event", &event
, NULL
);
403 case SDL_VIDEORESIZE
:
404 this->window_width
= event
.resize
.w
;
405 this->window_height
= event
.resize
.h
;
413 mlt_producer producer
= mlt_properties_get_data( properties
, "transport_producer", NULL
);
414 char keyboard
[ 2 ] = " ";
415 void (*callback
)( mlt_producer
, char * ) = mlt_properties_get_data( properties
, "transport_callback", NULL
);
416 if ( callback
!= NULL
&& producer
!= NULL
&& event
.key
.keysym
.unicode
< 0x80 && event
.key
.keysym
.unicode
> 0 )
418 keyboard
[ 0 ] = ( char )event
.key
.keysym
.unicode
;
419 callback( producer
, keyboard
);
427 if ( this->sdl_screen
== NULL
|| changed
)
430 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
431 if ( consumer_get_dimensions( &this->window_width
, &this->window_height
) )
432 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
441 this->last_position
== mlt_frame_get_position( frame
) &&
442 this->last_producer
== mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame
), "_producer", NULL
) )
444 sdl_unlock_display( );
445 if ( unlock
!= NULL
) unlock( );
449 // Update last frame shown info
450 this->last_position
= mlt_frame_get_position( frame
);
451 this->last_producer
= mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame
), "_producer", NULL
);
453 // Get the image, width and height
454 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
455 mlt_events_fire( properties
, "consumer-frame-show", frame
, NULL
);
459 char *rescale
= mlt_properties_get( properties
, "rescale" );
460 if ( rescale
!= NULL
&& strcmp( rescale
, "none" ) )
462 double this_aspect
= display_ratio
/ ( ( double )this->window_width
/ ( double )this->window_height
);
463 this->rect
.w
= this_aspect
* this->window_width
;
464 this->rect
.h
= this->window_height
;
465 if ( this->rect
.w
> this->window_width
)
467 this->rect
.w
= this->window_width
;
468 this->rect
.h
= ( 1.0 / this_aspect
) * this->window_height
;
473 double frame_aspect
= mlt_frame_get_aspect_ratio( frame
) * width
/ height
;
474 this->rect
.w
= frame_aspect
* this->window_height
;
475 this->rect
.h
= this->window_height
;
476 if ( this->rect
.w
> this->window_width
)
478 this->rect
.w
= this->window_width
;
479 this->rect
.h
= ( 1.0 / frame_aspect
) * this->window_width
;
483 this->rect
.x
= ( this->window_width
- this->rect
.w
) / 2;
484 this->rect
.y
= ( this->window_height
- this->rect
.h
) / 2;
486 mlt_properties_set_int( this->properties
, "rect_x", this->rect
.x
);
487 mlt_properties_set_int( this->properties
, "rect_y", this->rect
.y
);
488 mlt_properties_set_int( this->properties
, "rect_w", this->rect
.w
);
489 mlt_properties_set_int( this->properties
, "rect_h", this->rect
.h
);
492 if ( !mlt_consumer_is_stopped( &this->parent
) && SDL_GetVideoSurface( ) != NULL
&& this->sdl_screen
!= NULL
&& this->sdl_screen
->pixels
!= NULL
)
494 memset( this->sdl_screen
->pixels
, 0, this->window_width
* this->window_height
* this->sdl_screen
->format
->BytesPerPixel
);
496 switch( this->sdl_screen
->format
->BytesPerPixel
)
499 display_1( this->sdl_screen
, this->rect
, image
, width
, height
);
502 display_2( this->sdl_screen
, this->rect
, image
, width
, height
);
505 display_3( this->sdl_screen
, this->rect
, image
, width
, height
);
508 display_4( this->sdl_screen
, this->rect
, image
, width
, height
);
511 fprintf( stderr
, "Unsupported video depth %d\n", this->sdl_screen
->format
->BytesPerPixel
);
515 // Flip it into sight
516 SDL_Flip( this->sdl_screen
);
519 sdl_unlock_display();
521 if ( unlock
!= NULL
) unlock( );
526 /** Threaded wrapper for pipe.
529 static void *consumer_thread( void *arg
)
532 consumer_sdl
this = arg
;
535 mlt_consumer consumer
= &this->parent
;
536 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( consumer
);
538 // internal intialization
539 mlt_frame frame
= NULL
;
540 mlt_image_format vfmt
= mlt_image_rgb24a
;
541 int height
= this->height
;
542 int width
= this->width
;
543 uint8_t *image
= NULL
;
545 // Allow the hosting app to provide the preview
546 int preview_off
= mlt_properties_get_int( properties
, "preview_off" );
547 mlt_image_format preview_format
= mlt_properties_get_int( properties
, "preview_format" );
549 // Check if a specific colour space has been requested
550 if ( preview_off
&& preview_format
!= mlt_image_none
)
551 vfmt
= preview_format
;
553 // Loop until told not to
554 while( this->running
)
556 // Get a frame from the attached producer
557 frame
= mlt_consumer_rt_frame( consumer
);
559 // Ensure that we have a frame
560 if ( this->running
&& frame
!= NULL
)
562 if ( preview_off
== 0 )
564 consumer_play_video( this, frame
);
568 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
569 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame
), "format", vfmt
);
570 mlt_events_fire( properties
, "consumer-frame-show", frame
, NULL
);
572 mlt_frame_close( frame
);
576 if ( frame
) mlt_frame_close( frame
);
584 static int consumer_get_dimensions( int *width
, int *height
)
588 // SDL windows manager structure
591 // Specify the SDL Version
592 SDL_VERSION( &wm
.version
);
594 // Get the wm structure
595 if ( SDL_GetWMInfo( &wm
) == 1 )
598 // Check that we have the X11 wm
599 if ( wm
.subsystem
== SDL_SYSWM_X11
)
601 // Get the SDL window
602 Window window
= wm
.info
.x11
.window
;
604 // Get the display session
605 Display
*display
= wm
.info
.x11
.display
;
607 // Get the window attributes
608 XWindowAttributes attr
;
609 XGetWindowAttributes( display
, window
, &attr
);
611 // Determine whether window has changed
612 changed
= *width
!= attr
.width
|| *height
!= attr
.height
;
614 // Return width and height
616 *height
= attr
.height
;
624 /** Callback to allow override of the close method.
627 static void consumer_close( mlt_consumer parent
)
629 // Get the actual object
630 consumer_sdl
this = parent
->child
;
633 mlt_consumer_stop( parent
);
635 // Now clean up the rest
636 mlt_consumer_close( parent
);
638 // Finally clean up this