2 * consumer_sdl_preview.c -- A Simple DirectMedia Layer consumer
3 * Copyright (C) 2004-2005 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_factory.h>
24 #include <framework/mlt_producer.h>
28 #include <SDL/SDL_syswm.h>
30 typedef struct consumer_sdl_s
*consumer_sdl
;
34 struct mlt_consumer_s parent
;
46 /** Forward references to static functions.
49 static int consumer_start( mlt_consumer parent
);
50 static int consumer_stop( mlt_consumer parent
);
51 static int consumer_is_stopped( mlt_consumer parent
);
52 static void consumer_close( mlt_consumer parent
);
53 static void *consumer_thread( void * );
54 static void consumer_frame_show_cb( mlt_consumer sdl
, mlt_consumer
this, mlt_frame frame
);
55 static void consumer_sdl_event_cb( mlt_consumer sdl
, mlt_consumer
this, SDL_Event
*event
);
57 mlt_consumer
consumer_sdl_preview_init( char *arg
)
59 consumer_sdl
this = calloc( sizeof( struct consumer_sdl_s
), 1 );
60 if ( this != NULL
&& mlt_consumer_init( &this->parent
, this ) == 0 )
62 // Get the parent consumer object
63 mlt_consumer parent
= &this->parent
;
66 mlt_properties properties
= mlt_consumer_properties( parent
);
68 // Get the width and height
69 int width
= mlt_properties_get_int( properties
, "width" );
70 int height
= mlt_properties_get_int( properties
, "height" );
72 // Process actual param
73 if ( arg
== NULL
|| sscanf( arg
, "%dx%d", &width
, &height
) == 2 )
75 mlt_properties_set_int( properties
, "width", width
);
76 mlt_properties_set_int( properties
, "height", height
);
79 // Create child consumers
80 this->play
= mlt_factory_consumer( "sdl", arg
);
81 this->still
= mlt_factory_consumer( "sdl_still", arg
);
82 mlt_properties_set( mlt_consumer_properties( parent
), "real_time", "0" );
83 mlt_properties_set( mlt_consumer_properties( parent
), "rescale", "nearest" );
84 parent
->close
= consumer_close
;
85 parent
->start
= consumer_start
;
86 parent
->stop
= consumer_stop
;
87 parent
->is_stopped
= consumer_is_stopped
;
89 mlt_events_listen( mlt_consumer_properties( this->play
), this, "consumer-frame-show", ( mlt_listener
)consumer_frame_show_cb
);
90 mlt_events_listen( mlt_consumer_properties( this->still
), this, "consumer-frame-show", ( mlt_listener
)consumer_frame_show_cb
);
91 mlt_events_listen( mlt_consumer_properties( this->play
), this, "consumer-sdl-event", ( mlt_listener
)consumer_sdl_event_cb
);
92 mlt_events_listen( mlt_consumer_properties( this->still
), this, "consumer-sdl-event", ( mlt_listener
)consumer_sdl_event_cb
);
99 void consumer_frame_show_cb( mlt_consumer sdl
, mlt_consumer parent
, mlt_frame frame
)
101 consumer_sdl
this = parent
->child
;
102 this->last_speed
= mlt_properties_get_double( mlt_frame_properties( frame
), "_speed" );
103 mlt_events_fire( mlt_consumer_properties( parent
), "consumer-frame-show", frame
, NULL
);
106 static void consumer_sdl_event_cb( mlt_consumer sdl
, mlt_consumer parent
, SDL_Event
*event
)
108 mlt_events_fire( mlt_consumer_properties( parent
), "consumer-sdl-event", event
, NULL
);
111 static int consumer_start( mlt_consumer parent
)
113 consumer_sdl
this = parent
->child
;
115 if ( !this->running
)
117 pthread_attr_t thread_attributes
;
119 consumer_stop( parent
);
123 this->last_speed
= 1;
125 // Inherit the scheduling priority
126 pthread_attr_init( &thread_attributes
);
127 pthread_attr_setinheritsched( &thread_attributes
, PTHREAD_INHERIT_SCHED
);
129 pthread_create( &this->thread
, &thread_attributes
, consumer_thread
, this );
135 static int consumer_stop( mlt_consumer parent
)
137 // Get the actual object
138 consumer_sdl
this = parent
->child
;
140 if ( this->joined
== 0 )
142 mlt_properties properties
= mlt_consumer_properties( parent
);
143 int app_locked
= mlt_properties_get_int( properties
, "app_locked" );
144 void ( *lock
)( void ) = mlt_properties_get_data( properties
, "app_lock", NULL
);
145 void ( *unlock
)( void ) = mlt_properties_get_data( properties
, "app_unlock", NULL
);
147 if ( app_locked
&& unlock
) unlock( );
149 // Kill the thread and clean up
152 pthread_join( this->thread
, NULL
);
155 if ( app_locked
&& lock
) lock( );
161 static int consumer_is_stopped( mlt_consumer parent
)
163 consumer_sdl
this = parent
->child
;
164 return !this->running
;
167 static void *consumer_thread( void *arg
)
170 consumer_sdl
this = arg
;
173 mlt_consumer consumer
= &this->parent
;
175 // internal intialization
177 mlt_frame frame
= NULL
;
180 mlt_properties properties
= mlt_consumer_properties( consumer
);
181 mlt_properties play
= mlt_consumer_properties( this->play
);
182 mlt_properties still
= mlt_consumer_properties( this->still
);
184 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_NOPARACHUTE
) < 0 )
186 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
190 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
191 SDL_EnableUNICODE( 1 );
193 // Inform child consumers that we control the sdl
194 mlt_properties_set_int( play
, "sdl_started", 1 );
195 mlt_properties_set_int( still
, "sdl_started", 1 );
197 // Pass properties down
198 mlt_properties_set_data( play
, "transport_producer", mlt_properties_get_data( properties
, "transport_producer", NULL
), 0, NULL
, NULL
);
199 mlt_properties_set_data( still
, "transport_producer", mlt_properties_get_data( properties
, "transport_producer", NULL
), 0, NULL
, NULL
);
200 mlt_properties_set_data( play
, "transport_callback", mlt_properties_get_data( properties
, "transport_callback", NULL
), 0, NULL
, NULL
);
201 mlt_properties_set_data( still
, "transport_callback", mlt_properties_get_data( properties
, "transport_callback", NULL
), 0, NULL
, NULL
);
202 mlt_properties_set_int( play
, "resize", mlt_properties_get_int( properties
, "resize" ) );
203 mlt_properties_set_int( still
, "resize", mlt_properties_get_int( properties
, "resize" ) );
204 mlt_properties_set( play
, "rescale", mlt_properties_get( properties
, "rescale" ) );
205 mlt_properties_set( still
, "rescale", mlt_properties_get( properties
, "rescale" ) );
206 mlt_properties_set_int( play
, "width", mlt_properties_get_int( properties
, "width" ) );
207 mlt_properties_set_int( still
, "width", mlt_properties_get_int( properties
, "width" ) );
208 mlt_properties_set_int( play
, "height", mlt_properties_get_int( properties
, "height" ) );
209 mlt_properties_set_int( still
, "height", mlt_properties_get_int( properties
, "height" ) );
211 mlt_properties_set_int( play
, "progressive", 1 );
212 mlt_properties_set_int( still
, "progressive", 1 );
214 mlt_properties_pass( play
, mlt_consumer_properties( consumer
), "play." );
215 mlt_properties_pass( still
, mlt_consumer_properties( consumer
), "still." );
217 mlt_properties_set_data( play
, "app_lock", mlt_properties_get_data( properties
, "app_lock", NULL
), 0, NULL
, NULL
);
218 mlt_properties_set_data( still
, "app_lock", mlt_properties_get_data( properties
, "app_lock", NULL
), 0, NULL
, NULL
);
219 mlt_properties_set_data( play
, "app_unlock", mlt_properties_get_data( properties
, "app_unlock", NULL
), 0, NULL
, NULL
);
220 mlt_properties_set_data( still
, "app_unlock", mlt_properties_get_data( properties
, "app_unlock", NULL
), 0, NULL
, NULL
);
222 mlt_properties_set_int( play
, "put_mode", 1 );
223 mlt_properties_set_int( still
, "put_mode", 1 );
225 // Loop until told not to
226 while( this->running
)
228 // Get a frame from the attached producer
229 frame
= mlt_consumer_get_frame( consumer
);
231 // Ensure that we have a frame
234 // Get the speed of the frame
235 double speed
= mlt_properties_get_double( mlt_frame_properties( frame
), "_speed" );
237 // Determine which speed to use
238 double use_speed
= first ? speed
: this->last_speed
;
240 // Get changed requests to the preview (focus changes)
241 int changed
= mlt_properties_get_int( properties
, "changed" );
243 // Get refresh request for the current frame (effect changes in still mode)
244 int refresh
= mlt_properties_get_int( properties
, "refresh" );
246 // Decrement refresh and clear changed
247 mlt_properties_set_int( properties
, "refresh", refresh
> 0 ? refresh
- 1 : 0 );
248 mlt_properties_set_int( properties
, "changed", 0 );
250 // Set the changed property on this frame for the benefit of still
251 mlt_properties_set_int( mlt_frame_properties( frame
), "refresh", refresh
);
253 // Make sure the recipient knows that this frame isn't really rendered
254 mlt_properties_set_int( mlt_frame_properties( frame
), "rendered", 0 );
256 // If we're not the first frame and both consumers are stopped, then stop ourselves
257 if ( !first
&& mlt_consumer_is_stopped( this->play
) && mlt_consumer_is_stopped( this->still
) )
260 mlt_frame_close( frame
);
262 // Allow a little grace time before switching consumers on speed changes
263 else if ( this->ignore_change
-- > 0 && this->active
!= NULL
&& !mlt_consumer_is_stopped( this->active
) )
265 mlt_consumer_put_frame( this->active
, frame
);
266 mlt_properties_set_int( still
, "changed", changed
);
268 // If we aren't playing normally, then use the still
269 else if ( use_speed
!= 1 )
271 if ( !mlt_consumer_is_stopped( this->play
) )
272 mlt_consumer_stop( this->play
);
273 if ( mlt_consumer_is_stopped( this->still
) )
275 this->last_speed
= use_speed
;
276 this->active
= this->still
;
277 mlt_consumer_start( this->still
);
279 mlt_properties_set_int( still
, "changed", changed
);
280 mlt_consumer_put_frame( this->still
, frame
);
282 // Otherwise use the normal player
285 if ( !mlt_consumer_is_stopped( this->still
) )
286 mlt_consumer_stop( this->still
);
287 if ( mlt_consumer_is_stopped( this->play
) )
289 this->last_speed
= use_speed
;
290 this->active
= this->play
;
291 this->ignore_change
= 25;
292 mlt_consumer_start( this->play
);
294 mlt_properties_set_int( still
, "changed", changed
);
295 mlt_consumer_put_frame( this->play
, frame
);
298 // Copy the rectangle info from the active consumer
301 mlt_properties active
= mlt_consumer_properties( this->active
);
302 mlt_properties_set_int( properties
, "rect_x", mlt_properties_get_int( active
, "rect_x" ) );
303 mlt_properties_set_int( properties
, "rect_y", mlt_properties_get_int( active
, "rect_y" ) );
304 mlt_properties_set_int( properties
, "rect_w", mlt_properties_get_int( active
, "rect_w" ) );
305 mlt_properties_set_int( properties
, "rect_h", mlt_properties_get_int( active
, "rect_h" ) );
308 // We are definitely not waiting on the first frame any more
313 mlt_consumer_stop( this->play
);
314 mlt_consumer_stop( this->still
);
321 /** Callback to allow override of the close method.
324 static void consumer_close( mlt_consumer parent
)
326 // Get the actual object
327 consumer_sdl
this = parent
->child
;
330 mlt_consumer_stop( parent
);
332 // Now clean up the rest
333 mlt_consumer_close( parent
);
335 // Close the child consumers
336 mlt_consumer_close( this->play
);
337 mlt_consumer_close( this->still
);
339 // Finally clean up this