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>
29 #include <SDL/SDL_syswm.h>
31 typedef struct consumer_sdl_s
*consumer_sdl
;
35 struct mlt_consumer_s parent
;
46 pthread_cond_t refresh_cond
;
47 pthread_mutex_t refresh_mutex
;
50 /** Forward references to static functions.
53 static int consumer_start( mlt_consumer parent
);
54 static int consumer_stop( mlt_consumer parent
);
55 static int consumer_is_stopped( mlt_consumer parent
);
56 static void consumer_close( mlt_consumer parent
);
57 static void *consumer_thread( void * );
58 static void consumer_frame_show_cb( mlt_consumer sdl
, mlt_consumer
this, mlt_frame frame
);
59 static void consumer_sdl_event_cb( mlt_consumer sdl
, mlt_consumer
this, SDL_Event
*event
);
60 static void consumer_refresh_cb( mlt_consumer sdl
, mlt_consumer
this, char *name
);
62 mlt_consumer
consumer_sdl_preview_init( char *arg
)
64 consumer_sdl
this = calloc( sizeof( struct consumer_sdl_s
), 1 );
65 if ( this != NULL
&& mlt_consumer_init( &this->parent
, this ) == 0 )
67 // Get the parent consumer object
68 mlt_consumer parent
= &this->parent
;
71 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( parent
);
73 // Get the width and height
74 int width
= mlt_properties_get_int( properties
, "width" );
75 int height
= mlt_properties_get_int( properties
, "height" );
77 // Process actual param
78 if ( arg
== NULL
|| sscanf( arg
, "%dx%d", &width
, &height
) == 2 )
80 mlt_properties_set_int( properties
, "width", width
);
81 mlt_properties_set_int( properties
, "height", height
);
84 // Create child consumers
85 this->play
= mlt_factory_consumer( "sdl", arg
);
86 this->still
= mlt_factory_consumer( "sdl_still", arg
);
87 mlt_properties_set( MLT_CONSUMER_PROPERTIES( parent
), "real_time", "0" );
88 mlt_properties_set( MLT_CONSUMER_PROPERTIES( parent
), "rescale", "nearest" );
89 parent
->close
= consumer_close
;
90 parent
->start
= consumer_start
;
91 parent
->stop
= consumer_stop
;
92 parent
->is_stopped
= consumer_is_stopped
;
94 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->play
), this, "consumer-frame-show", ( mlt_listener
)consumer_frame_show_cb
);
95 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->still
), this, "consumer-frame-show", ( mlt_listener
)consumer_frame_show_cb
);
96 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->play
), this, "consumer-sdl-event", ( mlt_listener
)consumer_sdl_event_cb
);
97 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->still
), this, "consumer-sdl-event", ( mlt_listener
)consumer_sdl_event_cb
);
98 pthread_cond_init( &this->refresh_cond
, NULL
);
99 pthread_mutex_init( &this->refresh_mutex
, NULL
);
100 mlt_events_listen( MLT_CONSUMER_PROPERTIES( parent
), this, "property-changed", ( mlt_listener
)consumer_refresh_cb
);
107 void consumer_frame_show_cb( mlt_consumer sdl
, mlt_consumer parent
, mlt_frame frame
)
109 consumer_sdl
this = parent
->child
;
110 this->last_speed
= mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame
), "_speed" );
111 mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent
), "consumer-frame-show", frame
, NULL
);
114 static void consumer_sdl_event_cb( mlt_consumer sdl
, mlt_consumer parent
, SDL_Event
*event
)
116 mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent
), "consumer-sdl-event", event
, NULL
);
119 static void consumer_refresh_cb( mlt_consumer sdl
, mlt_consumer parent
, char *name
)
121 if ( !strcmp( name
, "refresh" ) )
123 consumer_sdl
this = parent
->child
;
124 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent
), "refresh" ) )
126 pthread_mutex_lock( &this->refresh_mutex
);
127 pthread_cond_broadcast( &this->refresh_cond
);
128 pthread_mutex_unlock( &this->refresh_mutex
);
133 static int consumer_start( mlt_consumer parent
)
135 consumer_sdl
this = parent
->child
;
137 if ( !this->running
)
139 pthread_attr_t thread_attributes
;
141 consumer_stop( parent
);
145 this->last_speed
= 1;
147 // Inherit the scheduling priority
148 pthread_attr_init( &thread_attributes
);
149 pthread_attr_setinheritsched( &thread_attributes
, PTHREAD_INHERIT_SCHED
);
151 pthread_create( &this->thread
, &thread_attributes
, consumer_thread
, this );
157 static int consumer_stop( mlt_consumer parent
)
159 // Get the actual object
160 consumer_sdl
this = parent
->child
;
162 if ( this->joined
== 0 )
164 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( parent
);
165 int app_locked
= mlt_properties_get_int( properties
, "app_locked" );
166 void ( *lock
)( void ) = mlt_properties_get_data( properties
, "app_lock", NULL
);
167 void ( *unlock
)( void ) = mlt_properties_get_data( properties
, "app_unlock", NULL
);
169 if ( app_locked
&& unlock
) unlock( );
171 // Kill the thread and clean up
174 pthread_mutex_lock( &this->refresh_mutex
);
175 pthread_cond_broadcast( &this->refresh_cond
);
176 pthread_mutex_unlock( &this->refresh_mutex
);
178 if ( this->play
) mlt_consumer_stop( this->play
);
179 if ( this->still
) mlt_consumer_stop( this->still
);
181 pthread_join( this->thread
, NULL
);
184 if ( app_locked
&& lock
) lock( );
190 static int consumer_is_stopped( mlt_consumer parent
)
192 consumer_sdl
this = parent
->child
;
193 return !this->running
;
196 static void *consumer_thread( void *arg
)
199 consumer_sdl
this = arg
;
202 mlt_consumer consumer
= &this->parent
;
204 // internal intialization
206 mlt_frame frame
= NULL
;
207 int last_position
= -1;
210 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( consumer
);
211 mlt_properties play
= MLT_CONSUMER_PROPERTIES( this->play
);
212 mlt_properties still
= MLT_CONSUMER_PROPERTIES( this->still
);
214 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_NOPARACHUTE
) < 0 )
216 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
220 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
221 SDL_EnableUNICODE( 1 );
223 // Inform child consumers that we control the sdl
224 mlt_properties_set_int( play
, "sdl_started", 1 );
225 mlt_properties_set_int( still
, "sdl_started", 1 );
227 // Pass properties down
228 mlt_properties_set_data( play
, "transport_producer", mlt_properties_get_data( properties
, "transport_producer", NULL
), 0, NULL
, NULL
);
229 mlt_properties_set_data( still
, "transport_producer", mlt_properties_get_data( properties
, "transport_producer", NULL
), 0, NULL
, NULL
);
230 mlt_properties_set_data( play
, "transport_callback", mlt_properties_get_data( properties
, "transport_callback", NULL
), 0, NULL
, NULL
);
231 mlt_properties_set_data( still
, "transport_callback", mlt_properties_get_data( properties
, "transport_callback", NULL
), 0, NULL
, NULL
);
232 mlt_properties_set_int( play
, "resize", mlt_properties_get_int( properties
, "resize" ) );
233 mlt_properties_set_int( still
, "resize", mlt_properties_get_int( properties
, "resize" ) );
234 mlt_properties_set( play
, "rescale", mlt_properties_get( properties
, "rescale" ) );
235 mlt_properties_set( still
, "rescale", mlt_properties_get( properties
, "rescale" ) );
236 mlt_properties_set_int( play
, "width", mlt_properties_get_int( properties
, "width" ) );
237 mlt_properties_set_int( still
, "width", mlt_properties_get_int( properties
, "width" ) );
238 mlt_properties_set_int( play
, "height", mlt_properties_get_int( properties
, "height" ) );
239 mlt_properties_set_int( still
, "height", mlt_properties_get_int( properties
, "height" ) );
241 mlt_properties_set_int( play
, "progressive", 1 );
242 mlt_properties_set_int( still
, "progressive", 1 );
244 mlt_properties_pass( play
, MLT_CONSUMER_PROPERTIES( consumer
), "play." );
245 mlt_properties_pass( still
, MLT_CONSUMER_PROPERTIES( consumer
), "still." );
247 mlt_properties_set_data( play
, "app_lock", mlt_properties_get_data( properties
, "app_lock", NULL
), 0, NULL
, NULL
);
248 mlt_properties_set_data( still
, "app_lock", mlt_properties_get_data( properties
, "app_lock", NULL
), 0, NULL
, NULL
);
249 mlt_properties_set_data( play
, "app_unlock", mlt_properties_get_data( properties
, "app_unlock", NULL
), 0, NULL
, NULL
);
250 mlt_properties_set_data( still
, "app_unlock", mlt_properties_get_data( properties
, "app_unlock", NULL
), 0, NULL
, NULL
);
252 mlt_properties_set_int( play
, "put_mode", 1 );
253 mlt_properties_set_int( still
, "put_mode", 1 );
255 // Loop until told not to
256 while( this->running
)
258 // Get a frame from the attached producer
259 frame
= mlt_consumer_get_frame( consumer
);
262 // Ensure that we have a frame
265 // Get the speed of the frame
266 double speed
= mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame
), "_speed" );
268 // Determine which speed to use
269 double use_speed
= speed
;
271 // Lock during the operation
272 mlt_service_lock( MLT_CONSUMER_SERVICE( consumer
) );
274 // Get refresh request for the current frame (effect changes in still mode)
275 int refresh
= mlt_properties_get_int( properties
, "refresh" );
277 // Decrement refresh and clear changed
278 mlt_properties_set_int( properties
, "refresh", refresh
> 0 ? refresh
- 1 : 0 );
280 // Unlock after the operation
281 mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer
) );
283 // Set the changed property on this frame for the benefit of still
284 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame
), "refresh", refresh
);
286 // Make sure the recipient knows that this frame isn't really rendered
287 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame
), "rendered", 0 );
289 // Optimisation to reduce latency
292 //if ( last_position != -1 && last_position + 1 != mlt_frame_get_position( frame ) )
293 //mlt_consumer_purge( this->play );
294 last_position
= mlt_frame_get_position( frame
);
301 // If we're not the first frame and both consumers are stopped, then stop ourselves
302 if ( !first
&& mlt_consumer_is_stopped( this->play
) && mlt_consumer_is_stopped( this->still
) )
305 mlt_frame_close( frame
);
307 // Allow a little grace time before switching consumers on speed changes
308 else if ( this->ignore_change
-- > 0 && this->active
!= NULL
&& !mlt_consumer_is_stopped( this->active
) )
310 mlt_consumer_put_frame( this->active
, frame
);
312 // If we aren't playing normally, then use the still
313 else if ( use_speed
!= 1 )
315 if ( !mlt_consumer_is_stopped( this->play
) )
316 mlt_consumer_stop( this->play
);
317 if ( mlt_consumer_is_stopped( this->still
) )
319 this->last_speed
= use_speed
;
320 this->active
= this->still
;
321 this->ignore_change
= 0;
322 mlt_consumer_start( this->still
);
324 mlt_consumer_put_frame( this->still
, frame
);
326 // Otherwise use the normal player
329 if ( !mlt_consumer_is_stopped( this->still
) )
330 mlt_consumer_stop( this->still
);
331 if ( mlt_consumer_is_stopped( this->play
) )
333 this->last_speed
= use_speed
;
334 this->active
= this->play
;
335 this->ignore_change
= 25;
336 mlt_consumer_start( this->play
);
338 mlt_consumer_put_frame( this->play
, frame
);
341 // Copy the rectangle info from the active consumer
344 mlt_properties active
= MLT_CONSUMER_PROPERTIES( this->active
);
345 mlt_service_lock( MLT_CONSUMER_SERVICE( consumer
) );
346 mlt_properties_set_int( properties
, "rect_x", mlt_properties_get_int( active
, "rect_x" ) );
347 mlt_properties_set_int( properties
, "rect_y", mlt_properties_get_int( active
, "rect_y" ) );
348 mlt_properties_set_int( properties
, "rect_w", mlt_properties_get_int( active
, "rect_w" ) );
349 mlt_properties_set_int( properties
, "rect_h", mlt_properties_get_int( active
, "rect_h" ) );
350 mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer
) );
353 if ( this->active
== this->still
)
355 pthread_mutex_lock( &this->refresh_mutex
);
356 if ( speed
== 0 && mlt_properties_get_int( properties
, "refresh" ) == 0 )
357 pthread_cond_wait( &this->refresh_cond
, &this->refresh_mutex
);
358 pthread_mutex_unlock( &this->refresh_mutex
);
361 // We are definitely not waiting on the first frame any more
366 mlt_consumer_stop( this->play
);
367 mlt_consumer_stop( this->still
);
374 /** Callback to allow override of the close method.
377 static void consumer_close( mlt_consumer parent
)
379 // Get the actual object
380 consumer_sdl
this = parent
->child
;
383 mlt_consumer_stop( parent
);
385 // Now clean up the rest
386 mlt_consumer_close( parent
);
388 // Close the child consumers
389 mlt_consumer_close( this->play
);
390 mlt_consumer_close( this->still
);
392 // Finally clean up this