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 <framework/mlt_consumer.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( mlt_profile profile
, mlt_service_type type
, const char *id
, 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, profile
) == 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_profile profile
= mlt_service_profile( MLT_CONSUMER_SERVICE( parent
) );
158 mlt_filter filter
= mlt_factory_filter( profile
, "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 this->width
= mlt_properties_get_int( this->properties
, "width" );
173 this->height
= mlt_properties_get_int( this->properties
, "height" );
175 // Default window size
176 double display_ratio
= mlt_properties_get_double( this->properties
, "display_ratio" );
177 this->window_width
= ( double )this->height
* display_ratio
;
178 this->window_height
= this->height
;
180 if ( sdl_started
== 0 && preview_off
== 0 )
182 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_NOPARACHUTE
) < 0 )
184 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
188 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
189 SDL_EnableUNICODE( 1 );
191 else if ( preview_off
== 0 )
193 if ( SDL_GetVideoSurface( ) != NULL
)
195 this->sdl_screen
= SDL_GetVideoSurface( );
199 if ( this->sdl_screen
== NULL
&& preview_off
== 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 int preview_off
= mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent
), "preview_off" );
216 int sdl_started
= mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent
), "sdl_started" );
218 // Kill the thread and clean up
221 pthread_join( this->thread
, NULL
);
224 if ( sdl_started
== 0 && preview_off
== 0 )
227 this->sdl_screen
= NULL
;
233 static int consumer_is_stopped( mlt_consumer parent
)
235 consumer_sdl
this = parent
->child
;
236 return !this->running
;
239 static int sdl_lock_display( )
241 SDL_Surface
*screen
= SDL_GetVideoSurface( );
242 return screen
!= NULL
&& ( !SDL_MUSTLOCK( screen
) || SDL_LockSurface( screen
) >= 0 );
245 static void sdl_unlock_display( )
247 SDL_Surface
*screen
= SDL_GetVideoSurface( );
248 if ( screen
!= NULL
&& SDL_MUSTLOCK( screen
) )
249 SDL_UnlockSurface( screen
);
252 static inline void display_1( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
254 // Generate the affine transform scaling values
255 int scale_width
= ( width
<< 16 ) / rect
.w
;
256 int scale_height
= ( height
<< 16 ) / rect
.h
;
257 int stride
= width
* 3;
261 // Constants defined for clarity and optimisation
262 int scanlength
= screen
->pitch
;
263 uint8_t *start
= ( uint8_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
266 // Iterate through the screen using a very basic scaling algorithm
267 for ( y
= 0; y
< rect
.h
; y
++ )
270 row_index
= ( 32768 + scale_height
* y
) >> 16;
271 row
= image
+ stride
* row_index
;
272 for ( x
= 0; x
< rect
.w
; x
++ )
274 q
= row
+ ( ( ( 32768 + scale_width
* x
) >> 16 ) * 3 );
275 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
281 static inline void display_2( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
283 // Generate the affine transform scaling values
284 int scale_width
= ( width
<< 16 ) / rect
.w
;
285 int scale_height
= ( height
<< 16 ) / rect
.h
;
286 int stride
= width
* 3;
290 // Constants defined for clarity and optimisation
291 int scanlength
= screen
->pitch
/ 2;
292 uint16_t *start
= ( uint16_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
295 // Iterate through the screen using a very basic scaling algorithm
296 for ( y
= 0; y
< rect
.h
; y
++ )
299 row_index
= ( 32768 + scale_height
* y
) >> 16;
300 row
= image
+ stride
* row_index
;
301 for ( x
= 0; x
< rect
.w
; x
++ )
303 q
= row
+ ( ( ( 32768 + scale_width
* x
) >> 16 ) * 3 );
304 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
310 static inline void display_3( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
312 // Generate the affine transform scaling values
313 int scale_width
= ( width
<< 16 ) / rect
.w
;
314 int scale_height
= ( height
<< 16 ) / rect
.h
;
315 int stride
= width
* 3;
319 // Constants defined for clarity and optimisation
320 int scanlength
= screen
->pitch
;
321 uint8_t *start
= ( uint8_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
325 // Iterate through the screen using a very basic scaling algorithm
326 for ( y
= 0; y
< rect
.h
; y
++ )
329 row_index
= ( 32768 + scale_height
* y
) >> 16;
330 row
= image
+ stride
* row_index
;
331 for ( x
= 0; x
< rect
.w
; x
++ )
333 q
= row
+ ( ( ( 32768 + scale_width
* x
) >> 16 ) * 3 );
334 pixel
= SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
335 *p
++ = (pixel
& 0xFF0000) >> 16;
336 *p
++ = (pixel
& 0x00FF00) >> 8;
337 *p
++ = (pixel
& 0x0000FF);
343 static inline void display_4( SDL_Surface
*screen
, SDL_Rect rect
, uint8_t *image
, int width
, int height
)
345 // Generate the affine transform scaling values
346 int scale_width
= ( width
<< 16 ) / rect
.w
;
347 int scale_height
= ( height
<< 16 ) / rect
.h
;
348 int stride
= width
* 3;
352 // Constants defined for clarity and optimisation
353 int scanlength
= screen
->pitch
/ 4;
354 uint32_t *start
= ( uint32_t * )screen
->pixels
+ rect
.y
* scanlength
+ rect
.x
;
357 // Iterate through the screen using a very basic scaling algorithm
358 for ( y
= 0; y
< rect
.h
; y
++ )
361 row_index
= ( 32768 + scale_height
* y
) >> 16;
362 row
= image
+ stride
* row_index
;
363 for ( x
= 0; x
< rect
.w
; x
++ )
365 q
= row
+ ( ( ( 32768 + scale_width
* x
) >> 16 ) * 3 );
366 *p
++ = SDL_MapRGB( screen
->format
, *q
, *( q
+ 1 ), *( q
+ 2 ) );
372 static int consumer_play_video( consumer_sdl
this, mlt_frame frame
)
374 // Get the properties of this consumer
375 mlt_properties properties
= this->properties
;
377 mlt_image_format vfmt
= mlt_image_rgb24
;
378 int height
= this->height
;
379 int width
= this->width
;
380 uint8_t *image
= NULL
;
382 double display_ratio
= mlt_properties_get_double( this->properties
, "display_ratio" );
384 void ( *lock
)( void ) = mlt_properties_get_data( properties
, "app_lock", NULL
);
385 void ( *unlock
)( void ) = mlt_properties_get_data( properties
, "app_unlock", NULL
);
387 if ( lock
!= NULL
) lock( );
392 if ( this->sdl_screen
!= NULL
)
396 changed
= consumer_get_dimensions( &this->window_width
, &this->window_height
);
398 while ( SDL_PollEvent( &event
) )
400 mlt_events_fire( this->properties
, "consumer-sdl-event", &event
, NULL
);
404 case SDL_VIDEORESIZE
:
405 this->window_width
= event
.resize
.w
;
406 this->window_height
= event
.resize
.h
;
414 mlt_producer producer
= mlt_properties_get_data( properties
, "transport_producer", NULL
);
415 char keyboard
[ 2 ] = " ";
416 void (*callback
)( mlt_producer
, char * ) = mlt_properties_get_data( properties
, "transport_callback", NULL
);
417 if ( callback
!= NULL
&& producer
!= NULL
&& event
.key
.keysym
.unicode
< 0x80 && event
.key
.keysym
.unicode
> 0 )
419 keyboard
[ 0 ] = ( char )event
.key
.keysym
.unicode
;
420 callback( producer
, keyboard
);
428 if ( this->sdl_screen
== NULL
|| changed
)
431 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
432 if ( consumer_get_dimensions( &this->window_width
, &this->window_height
) )
433 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
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
) unlock( );
450 // Update last frame shown info
451 this->last_position
= mlt_frame_get_position( frame
);
452 this->last_producer
= mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame
), "_producer", NULL
);
454 // Get the image, width and height
455 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
456 mlt_events_fire( properties
, "consumer-frame-show", frame
, NULL
);
460 char *rescale
= mlt_properties_get( properties
, "rescale" );
461 if ( rescale
!= NULL
&& strcmp( rescale
, "none" ) )
463 double this_aspect
= display_ratio
/ ( ( double )this->window_width
/ ( double )this->window_height
);
464 this->rect
.w
= this_aspect
* this->window_width
;
465 this->rect
.h
= this->window_height
;
466 if ( this->rect
.w
> this->window_width
)
468 this->rect
.w
= this->window_width
;
469 this->rect
.h
= ( 1.0 / this_aspect
) * this->window_height
;
474 double frame_aspect
= mlt_frame_get_aspect_ratio( frame
) * width
/ height
;
475 this->rect
.w
= frame_aspect
* this->window_height
;
476 this->rect
.h
= this->window_height
;
477 if ( this->rect
.w
> this->window_width
)
479 this->rect
.w
= this->window_width
;
480 this->rect
.h
= ( 1.0 / frame_aspect
) * this->window_width
;
484 this->rect
.x
= ( this->window_width
- this->rect
.w
) / 2;
485 this->rect
.y
= ( this->window_height
- this->rect
.h
) / 2;
487 mlt_properties_set_int( this->properties
, "rect_x", this->rect
.x
);
488 mlt_properties_set_int( this->properties
, "rect_y", this->rect
.y
);
489 mlt_properties_set_int( this->properties
, "rect_w", this->rect
.w
);
490 mlt_properties_set_int( this->properties
, "rect_h", this->rect
.h
);
493 if ( !mlt_consumer_is_stopped( &this->parent
) && SDL_GetVideoSurface( ) != NULL
&& this->sdl_screen
!= NULL
&& this->sdl_screen
->pixels
!= NULL
)
495 memset( this->sdl_screen
->pixels
, 0, this->window_width
* this->window_height
* this->sdl_screen
->format
->BytesPerPixel
);
497 switch( this->sdl_screen
->format
->BytesPerPixel
)
500 display_1( this->sdl_screen
, this->rect
, image
, width
, height
);
503 display_2( this->sdl_screen
, this->rect
, image
, width
, height
);
506 display_3( this->sdl_screen
, this->rect
, image
, width
, height
);
509 display_4( this->sdl_screen
, this->rect
, image
, width
, height
);
512 fprintf( stderr
, "Unsupported video depth %d\n", this->sdl_screen
->format
->BytesPerPixel
);
516 // Flip it into sight
517 SDL_Flip( this->sdl_screen
);
520 sdl_unlock_display();
522 if ( unlock
!= NULL
) unlock( );
527 /** Threaded wrapper for pipe.
530 static void *consumer_thread( void *arg
)
533 consumer_sdl
this = arg
;
536 mlt_consumer consumer
= &this->parent
;
537 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( consumer
);
539 // internal intialization
540 mlt_frame frame
= NULL
;
541 mlt_image_format vfmt
= mlt_image_rgb24a
;
542 int height
= this->height
;
543 int width
= this->width
;
544 uint8_t *image
= NULL
;
546 // Allow the hosting app to provide the preview
547 int preview_off
= mlt_properties_get_int( properties
, "preview_off" );
548 mlt_image_format preview_format
= mlt_properties_get_int( properties
, "preview_format" );
550 // Check if a specific colour space has been requested
551 if ( preview_off
&& preview_format
!= mlt_image_none
)
552 vfmt
= preview_format
;
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
561 if ( this->running
&& frame
!= NULL
)
563 if ( preview_off
== 0 )
565 consumer_play_video( this, frame
);
569 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
570 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame
), "format", vfmt
);
571 mlt_events_fire( properties
, "consumer-frame-show", frame
, NULL
);
573 mlt_frame_close( frame
);
577 if ( frame
) mlt_frame_close( frame
);
585 static int consumer_get_dimensions( int *width
, int *height
)
589 // SDL windows manager structure
592 // Specify the SDL Version
593 SDL_VERSION( &wm
.version
);
595 // Get the wm structure
596 if ( SDL_GetWMInfo( &wm
) == 1 )
599 // Check that we have the X11 wm
600 if ( wm
.subsystem
== SDL_SYSWM_X11
)
602 // Get the SDL window
603 Window window
= wm
.info
.x11
.window
;
605 // Get the display session
606 Display
*display
= wm
.info
.x11
.display
;
608 // Get the window attributes
609 XWindowAttributes attr
;
610 XGetWindowAttributes( display
, window
, &attr
);
612 // Determine whether window has changed
613 changed
= *width
!= attr
.width
|| *height
!= attr
.height
;
615 // Return width and height
617 *height
= attr
.height
;
625 /** Callback to allow override of the close method.
628 static void consumer_close( mlt_consumer parent
)
630 // Get the actual object
631 consumer_sdl
this = parent
->child
;
634 mlt_consumer_stop( parent
);
636 // Now clean up the rest
637 mlt_consumer_close( parent
);
639 // Finally clean up this