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
;
63 /** Forward references to static functions.
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
);
74 /** This is what will be called by the factory - anything can be passed in
75 via the argument, but keep it simple.
78 mlt_consumer
consumer_sdl_still_init( char *arg
)
80 // Create the consumer object
81 consumer_sdl
this = calloc( sizeof( struct consumer_sdl_s
), 1 );
83 // If no malloc'd and consumer init ok
84 if ( this != NULL
&& mlt_consumer_init( &this->parent
, this ) == 0 )
86 // Get the parent consumer object
87 mlt_consumer parent
= &this->parent
;
89 // We have stuff to clean up, so override the close method
90 parent
->close
= consumer_close
;
92 // get a handle on properties
93 mlt_service service
= MLT_CONSUMER_SERVICE( parent
);
94 this->properties
= MLT_SERVICE_PROPERTIES( service
);
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 // Get sample aspect ratio
106 this->aspect_ratio
= mlt_properties_get_double( this->properties
, "aspect_ratio" );
108 // Ensure we don't join on a non-running object
111 // Default display aspect ratio
112 this->display_aspect
= 4.0 / 3.0;
114 // process actual param
115 if ( arg
== NULL
|| sscanf( arg
, "%dx%d", &this->width
, &this->height
) != 2 )
117 this->width
= mlt_properties_get_int( this->properties
, "width" );
118 this->height
= mlt_properties_get_int( this->properties
, "height" );
121 // Default window size
122 this->window_width
= ( float )this->height
* this->display_aspect
;
123 this->window_height
= this->height
;
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
;
130 // Allow thread to be started/stopped
131 parent
->start
= consumer_start
;
132 parent
->stop
= consumer_stop
;
133 parent
->is_stopped
= consumer_is_stopped
;
135 // Register specific events
136 mlt_events_register( this->properties
, "consumer-sdl-event", ( mlt_transmitter
)consumer_sdl_event
);
138 // Return the consumer produced
142 // malloc or consumer init failed
149 static void consumer_sdl_event( mlt_listener listener
, mlt_properties owner
, mlt_service
this, void **args
)
151 if ( listener
!= NULL
)
152 listener( owner
, this, ( SDL_Event
* )args
[ 0 ] );
155 static int consumer_start( mlt_consumer parent
)
157 consumer_sdl
this = parent
->child
;
159 if ( !this->running
)
161 // Attach a colour space converter
162 if ( !this->filtered
)
164 mlt_filter filter
= mlt_factory_filter( "avcolour_space", NULL
);
165 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter
), "forced", mlt_image_yuv422
);
166 mlt_service_attach( MLT_CONSUMER_SERVICE( parent
), filter
);
167 mlt_filter_close( filter
);
171 consumer_stop( parent
);
173 this->last_position
= -1;
177 // Allow the user to force resizing to window size
178 if ( mlt_properties_get_int( this->properties
, "resize" ) )
180 mlt_properties_set_int( this->properties
, "width", this->width
);
181 mlt_properties_set_int( this->properties
, "height", this->height
);
184 //this->width = this->height * this->display_aspect;
186 pthread_create( &this->thread
, NULL
, consumer_thread
, this );
192 static int consumer_stop( mlt_consumer parent
)
194 // Get the actual object
195 consumer_sdl
this = parent
->child
;
197 if ( this->joined
== 0 )
199 // Kill the thread and clean up
202 pthread_join( this->thread
, NULL
);
209 static int consumer_is_stopped( mlt_consumer parent
)
211 consumer_sdl
this = parent
->child
;
212 return !this->running
;
215 static int sdl_lock_display( )
217 SDL_Surface
*screen
= SDL_GetVideoSurface( );
218 return screen
!= NULL
&& ( !SDL_MUSTLOCK( screen
) || SDL_LockSurface( screen
) >= 0 );
221 static void sdl_unlock_display( )
223 SDL_Surface
*screen
= SDL_GetVideoSurface( );
224 if ( screen
!= NULL
&& SDL_MUSTLOCK( screen
) )
225 SDL_UnlockSurface( screen
);
228 static inline void display_1( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
230 // Generate the affine transform scaling values
231 int scale_width
= ( width
<< 16 ) / rect
.w
;
232 int scale_height
= ( height
<< 16 ) / rect
.h
;
233 int stride
= width
* 3;
237 // Constants defined for clarity and optimisation
238 int scanlength
= screen
->pitch
;
239 uint8_t *start
= ( uint8_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
242 // Iterate through the screen using a very basic scaling algorithm
243 for ( y
= 0; y
< rect
.h
; y
++ )
246 row_index
= ( scale_height
* y
) >> 16;
247 row
= image
+ stride
* row_index
;
248 for ( x
= 0; x
< rect
.w
; x
++ )
250 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
251 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
257 static inline void display_2( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
259 // Generate the affine transform scaling values
260 int scale_width
= ( width
<< 16 ) / rect
.w
;
261 int scale_height
= ( height
<< 16 ) / rect
.h
;
262 int stride
= width
* 3;
266 // Constants defined for clarity and optimisation
267 int scanlength
= screen
->pitch
/ 2;
268 uint16_t *start
= ( uint16_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
271 // Iterate through the screen using a very basic scaling algorithm
272 for ( y
= 0; y
< rect
.h
; y
++ )
275 row_index
= ( scale_height
* y
) >> 16;
276 row
= image
+ stride
* row_index
;
277 for ( x
= 0; x
< rect
.w
; x
++ )
279 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
280 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
286 static inline void display_3( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
288 // Generate the affine transform scaling values
289 int scale_width
= ( width
<< 16 ) / rect
.w
;
290 int scale_height
= ( height
<< 16 ) / rect
.h
;
291 int stride
= width
* 3;
295 // Constants defined for clarity and optimisation
296 int scanlength
= screen
->pitch
;
297 uint8_t *start
= ( uint8_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
301 // Iterate through the screen using a very basic scaling algorithm
302 for ( y
= 0; y
< rect
.h
; y
++ )
305 row_index
= ( scale_height
* y
) >> 16;
306 row
= image
+ stride
* row_index
;
307 for ( x
= 0; x
< rect
.w
; x
++ )
309 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
310 pixel
= SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
311 *p
++ = (pixel
& 0xFF0000) >> 16;
312 *p
++ = (pixel
& 0x00FF00) >> 8;
313 *p
++ = (pixel
& 0x0000FF);
319 static inline void display_4( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
321 // Generate the affine transform scaling values
322 int scale_width
= ( width
<< 16 ) / rect
.w
;
323 int scale_height
= ( height
<< 16 ) / rect
.h
;
324 int stride
= width
* 3;
328 // Constants defined for clarity and optimisation
329 int scanlength
= screen
->pitch
/ 4;
330 uint32_t *start
= ( uint32_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
333 // Iterate through the screen using a very basic scaling algorithm
334 for ( y
= 0; y
< rect
.h
; y
++ )
337 row_index
= ( scale_height
* y
) >> 16;
338 row
= image
+ stride
* row_index
;
339 for ( x
= 0; x
< rect
.w
; x
++ )
341 q
= row
+ ( ( ( scale_width
* x
) >> 16 ) * 3 );
342 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
348 static int consumer_play_video( consumer_sdl
this, mlt_frame frame
)
350 // Get the properties of this consumer
351 mlt_properties properties
= this->properties
;
353 mlt_image_format vfmt
= mlt_image_rgb24
;
354 int height
= this->height
;
355 int width
= this->width
;
356 uint8_t *image
= NULL
;
359 void ( *lock
)( void ) = mlt_properties_get_data( properties
, "app_lock", NULL
);
360 void ( *unlock
)( void ) = mlt_properties_get_data( properties
, "app_unlock", NULL
);
362 if ( lock
!= NULL
) lock( );
367 if ( this->sdl_screen
!= NULL
)
371 changed
= consumer_get_dimensions( &this->window_width
, &this->window_height
);
373 while ( SDL_PollEvent( &event
) )
375 mlt_events_fire( this->properties
, "consumer-sdl-event", &event
, NULL
);
379 case SDL_VIDEORESIZE
:
380 this->window_width
= event
.resize
.w
;
381 this->window_height
= event
.resize
.h
;
389 mlt_producer producer
= mlt_properties_get_data( properties
, "transport_producer", NULL
);
390 char keyboard
[ 2 ] = " ";
391 void (*callback
)( mlt_producer
, char * ) = mlt_properties_get_data( properties
, "transport_callback", NULL
);
392 if ( callback
!= NULL
&& producer
!= NULL
&& event
.key
.keysym
.unicode
< 0x80 && event
.key
.keysym
.unicode
> 0 )
394 keyboard
[ 0 ] = ( char )event
.key
.keysym
.unicode
;
395 callback( producer
, keyboard
);
403 if ( this->sdl_screen
== NULL
|| changed
|| mlt_properties_get_int( properties
, "changed" ) == 2 )
406 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
407 if ( consumer_get_dimensions( &this->window_width
, &this->window_height
) )
408 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
411 mlt_properties_set_int( properties
, "changed", 0 );
416 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 ( !mlt_consumer_is_stopped( &this->parent
) && SDL_GetVideoSurface( ) != NULL
&& this->sdl_screen
!= NULL
&& this->sdl_screen
->pixels
!= 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
;
532 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer
), "sdl_started" ) == 0 )
534 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_NOPARACHUTE
) < 0 )
536 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
540 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
541 SDL_EnableUNICODE( 1 );
545 mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( consumer
), "changed", 2 );
546 if ( SDL_GetVideoSurface( ) != NULL
)
548 this->sdl_screen
= SDL_GetVideoSurface( );
549 consumer_get_dimensions( &this->window_width
, &this->window_height
);
550 mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( consumer
), "changed", 0 );
554 // Loop until told not to
555 while( this->running
)
557 // Get a frame from the attached producer
558 frame
= mlt_consumer_rt_frame( consumer
);
560 // Ensure that we have a frame
563 consumer_play_video( this, frame
);
564 mlt_frame_close( frame
);
572 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer
), "sdl_started" ) == 0 )
575 this->sdl_screen
= NULL
;
580 static int consumer_get_dimensions( int *width
, int *height
)
584 // SDL windows manager structure
587 // Specify the SDL Version
588 SDL_VERSION( &wm
.version
);
590 // Get the wm structure
591 if ( SDL_GetWMInfo( &wm
) == 1 )
593 // Check that we have the X11 wm
594 if ( wm
.subsystem
== SDL_SYSWM_X11
)
596 // Get the SDL window
597 Window window
= wm
.info
.x11
.window
;
599 // Get the display session
600 Display
*display
= wm
.info
.x11
.display
;
602 // Get the window attributes
603 XWindowAttributes attr
;
604 XGetWindowAttributes( display
, window
, &attr
);
606 // Determine whether window has changed
607 changed
= *width
!= attr
.width
|| *height
!= attr
.height
;
609 // Return width and height
611 *height
= attr
.height
;
618 /** Callback to allow override of the close method.
621 static void consumer_close( mlt_consumer parent
)
623 // Get the actual object
624 consumer_sdl
this = parent
->child
;
627 mlt_consumer_stop( parent
);
629 // Now clean up the rest
630 mlt_consumer_close( parent
);
632 // Finally clean up this