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 if ( this->play
) mlt_consumer_stop( this->play
);
153 if ( this->still
) mlt_consumer_stop( this->still
);
155 pthread_join( this->thread
, NULL
);
158 if ( app_locked
&& lock
) lock( );
164 static int consumer_is_stopped( mlt_consumer parent
)
166 consumer_sdl
this = parent
->child
;
167 return !this->running
;
170 static void *consumer_thread( void *arg
)
173 consumer_sdl
this = arg
;
176 mlt_consumer consumer
= &this->parent
;
178 // internal intialization
180 mlt_frame frame
= NULL
;
181 int last_position
= -1;
184 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( consumer
);
185 mlt_properties play
= MLT_CONSUMER_PROPERTIES( this->play
);
186 mlt_properties still
= MLT_CONSUMER_PROPERTIES( this->still
);
188 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_NOPARACHUTE
) < 0 )
190 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
194 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
195 SDL_EnableUNICODE( 1 );
197 // Inform child consumers that we control the sdl
198 mlt_properties_set_int( play
, "sdl_started", 1 );
199 mlt_properties_set_int( still
, "sdl_started", 1 );
201 // Pass properties down
202 mlt_properties_set_data( play
, "transport_producer", mlt_properties_get_data( properties
, "transport_producer", NULL
), 0, NULL
, NULL
);
203 mlt_properties_set_data( still
, "transport_producer", mlt_properties_get_data( properties
, "transport_producer", NULL
), 0, NULL
, NULL
);
204 mlt_properties_set_data( play
, "transport_callback", mlt_properties_get_data( properties
, "transport_callback", NULL
), 0, NULL
, NULL
);
205 mlt_properties_set_data( still
, "transport_callback", mlt_properties_get_data( properties
, "transport_callback", NULL
), 0, NULL
, NULL
);
206 mlt_properties_set_int( play
, "resize", mlt_properties_get_int( properties
, "resize" ) );
207 mlt_properties_set_int( still
, "resize", mlt_properties_get_int( properties
, "resize" ) );
208 mlt_properties_set( play
, "rescale", mlt_properties_get( properties
, "rescale" ) );
209 mlt_properties_set( still
, "rescale", mlt_properties_get( properties
, "rescale" ) );
210 mlt_properties_set_int( play
, "width", mlt_properties_get_int( properties
, "width" ) );
211 mlt_properties_set_int( still
, "width", mlt_properties_get_int( properties
, "width" ) );
212 mlt_properties_set_int( play
, "height", mlt_properties_get_int( properties
, "height" ) );
213 mlt_properties_set_int( still
, "height", mlt_properties_get_int( properties
, "height" ) );
215 mlt_properties_set_int( play
, "progressive", 1 );
216 mlt_properties_set_int( still
, "progressive", 1 );
218 mlt_properties_pass( play
, MLT_CONSUMER_PROPERTIES( consumer
), "play." );
219 mlt_properties_pass( still
, MLT_CONSUMER_PROPERTIES( consumer
), "still." );
221 mlt_properties_set_data( play
, "app_lock", mlt_properties_get_data( properties
, "app_lock", NULL
), 0, NULL
, NULL
);
222 mlt_properties_set_data( still
, "app_lock", mlt_properties_get_data( properties
, "app_lock", NULL
), 0, NULL
, NULL
);
223 mlt_properties_set_data( play
, "app_unlock", mlt_properties_get_data( properties
, "app_unlock", NULL
), 0, NULL
, NULL
);
224 mlt_properties_set_data( still
, "app_unlock", mlt_properties_get_data( properties
, "app_unlock", NULL
), 0, NULL
, NULL
);
226 mlt_properties_set_int( play
, "put_mode", 1 );
227 mlt_properties_set_int( still
, "put_mode", 1 );
229 // Loop until told not to
230 while( this->running
)
232 // Get a frame from the attached producer
233 frame
= mlt_consumer_get_frame( consumer
);
235 // Ensure that we have a frame
238 // Get the speed of the frame
239 double speed
= mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame
), "_speed" );
241 // Determine which speed to use
242 double use_speed
= first ? speed
: this->last_speed
;
244 // Get changed requests to the preview (focus changes)
245 int changed
= mlt_properties_get_int( properties
, "changed" );
247 // Get refresh request for the current frame (effect changes in still mode)
248 int refresh
= mlt_properties_get_int( properties
, "refresh" );
250 // Decrement refresh and clear changed
251 mlt_properties_set_int( properties
, "refresh", refresh
> 0 ? refresh
- 1 : 0 );
252 mlt_properties_set_int( properties
, "changed", 0 );
254 // Set the changed property on this frame for the benefit of still
255 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame
), "refresh", refresh
);
257 // Make sure the recipient knows that this frame isn't really rendered
258 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame
), "rendered", 0 );
260 // Optimisation to reduce latency
263 if ( last_position
!= -1 && last_position
+ 1 != mlt_frame_get_position( frame
) )
264 mlt_consumer_purge( this->play
);
265 last_position
= mlt_frame_get_position( frame
);
272 // If we're not the first frame and both consumers are stopped, then stop ourselves
273 if ( !first
&& mlt_consumer_is_stopped( this->play
) && mlt_consumer_is_stopped( this->still
) )
276 mlt_frame_close( frame
);
278 // Allow a little grace time before switching consumers on speed changes
279 else if ( this->ignore_change
-- > 0 && this->active
!= NULL
&& !mlt_consumer_is_stopped( this->active
) )
281 mlt_consumer_put_frame( this->active
, frame
);
282 mlt_properties_set_int( still
, "changed", changed
);
284 // If we aren't playing normally, then use the still
285 else if ( use_speed
!= 1 )
287 if ( !mlt_consumer_is_stopped( this->play
) )
288 mlt_consumer_stop( this->play
);
289 if ( mlt_consumer_is_stopped( this->still
) )
291 this->last_speed
= use_speed
;
292 this->active
= this->still
;
293 mlt_consumer_start( this->still
);
295 mlt_properties_set_int( still
, "changed", changed
);
296 mlt_consumer_put_frame( this->still
, frame
);
298 // Otherwise use the normal player
301 if ( !mlt_consumer_is_stopped( this->still
) )
302 mlt_consumer_stop( this->still
);
303 if ( mlt_consumer_is_stopped( this->play
) )
305 this->last_speed
= use_speed
;
306 this->active
= this->play
;
307 this->ignore_change
= 25;
308 mlt_consumer_start( this->play
);
310 mlt_properties_set_int( still
, "changed", changed
);
311 mlt_consumer_put_frame( this->play
, frame
);
314 // Copy the rectangle info from the active consumer
317 mlt_properties active
= MLT_CONSUMER_PROPERTIES( this->active
);
318 mlt_properties_set_int( properties
, "rect_x", mlt_properties_get_int( active
, "rect_x" ) );
319 mlt_properties_set_int( properties
, "rect_y", mlt_properties_get_int( active
, "rect_y" ) );
320 mlt_properties_set_int( properties
, "rect_w", mlt_properties_get_int( active
, "rect_w" ) );
321 mlt_properties_set_int( properties
, "rect_h", mlt_properties_get_int( active
, "rect_h" ) );
324 // We are definitely not waiting on the first frame any more
329 mlt_consumer_stop( this->play
);
330 mlt_consumer_stop( this->still
);
337 /** Callback to allow override of the close method.
340 static void consumer_close( mlt_consumer parent
)
342 // Get the actual object
343 consumer_sdl
this = parent
->child
;
346 mlt_consumer_stop( parent
);
348 // Now clean up the rest
349 mlt_consumer_close( parent
);
351 // Close the child consumers
352 mlt_consumer_close( this->play
);
353 mlt_consumer_close( this->still
);
355 // Finally clean up this