2 * consumer_sdl_preview.c -- A Simple DirectMedia Layer consumer
3 * Copyright (C) 2004-2005 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_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
;
51 /** Forward references to static functions.
54 static int consumer_start( mlt_consumer parent
);
55 static int consumer_stop( mlt_consumer parent
);
56 static int consumer_is_stopped( mlt_consumer parent
);
57 static void consumer_close( mlt_consumer parent
);
58 static void *consumer_thread( void * );
59 static void consumer_frame_show_cb( mlt_consumer sdl
, mlt_consumer
this, mlt_frame frame
);
60 static void consumer_sdl_event_cb( mlt_consumer sdl
, mlt_consumer
this, SDL_Event
*event
);
61 static void consumer_refresh_cb( mlt_consumer sdl
, mlt_consumer
this, char *name
);
63 mlt_consumer
consumer_sdl_preview_init( mlt_profile profile
, mlt_service_type type
, const char *id
, char *arg
)
65 consumer_sdl
this = calloc( sizeof( struct consumer_sdl_s
), 1 );
66 if ( this != NULL
&& mlt_consumer_init( &this->parent
, this, profile
) == 0 )
68 // Get the parent consumer object
69 mlt_consumer parent
= &this->parent
;
72 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( parent
);
74 // Get the width and height
75 int width
= mlt_properties_get_int( properties
, "width" );
76 int height
= mlt_properties_get_int( properties
, "height" );
78 // Process actual param
79 if ( arg
== NULL
|| sscanf( arg
, "%dx%d", &width
, &height
) == 2 )
81 mlt_properties_set_int( properties
, "width", width
);
82 mlt_properties_set_int( properties
, "height", height
);
85 // Create child consumers
86 this->play
= mlt_factory_consumer( profile
, "sdl", arg
);
87 this->still
= mlt_factory_consumer( profile
, "sdl_still", arg
);
88 mlt_properties_set( MLT_CONSUMER_PROPERTIES( parent
), "real_time", "0" );
89 mlt_properties_set( MLT_CONSUMER_PROPERTIES( parent
), "rescale", "nearest" );
90 parent
->close
= consumer_close
;
91 parent
->start
= consumer_start
;
92 parent
->stop
= consumer_stop
;
93 parent
->is_stopped
= consumer_is_stopped
;
95 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->play
), this, "consumer-frame-show", ( mlt_listener
)consumer_frame_show_cb
);
96 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->still
), this, "consumer-frame-show", ( mlt_listener
)consumer_frame_show_cb
);
97 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->play
), this, "consumer-sdl-event", ( mlt_listener
)consumer_sdl_event_cb
);
98 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->still
), this, "consumer-sdl-event", ( mlt_listener
)consumer_sdl_event_cb
);
99 pthread_cond_init( &this->refresh_cond
, NULL
);
100 pthread_mutex_init( &this->refresh_mutex
, NULL
);
101 mlt_events_listen( MLT_CONSUMER_PROPERTIES( parent
), this, "property-changed", ( mlt_listener
)consumer_refresh_cb
);
108 void consumer_frame_show_cb( mlt_consumer sdl
, mlt_consumer parent
, mlt_frame frame
)
110 consumer_sdl
this = parent
->child
;
111 this->last_speed
= mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame
), "_speed" );
112 mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent
), "consumer-frame-show", frame
, NULL
);
115 static void consumer_sdl_event_cb( mlt_consumer sdl
, mlt_consumer parent
, SDL_Event
*event
)
117 mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent
), "consumer-sdl-event", event
, NULL
);
120 static void consumer_refresh_cb( mlt_consumer sdl
, mlt_consumer parent
, char *name
)
122 if ( !strcmp( name
, "refresh" ) )
124 consumer_sdl
this = parent
->child
;
125 pthread_mutex_lock( &this->refresh_mutex
);
126 this->refresh_count
= this->refresh_count
<= 0 ?
1 : this->refresh_count
++;
127 pthread_cond_broadcast( &this->refresh_cond
);
128 pthread_mutex_unlock( &this->refresh_mutex
);
132 static int consumer_start( mlt_consumer parent
)
134 consumer_sdl
this = parent
->child
;
136 if ( !this->running
)
139 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( parent
);
140 mlt_properties play
= MLT_CONSUMER_PROPERTIES( this->play
);
141 mlt_properties still
= MLT_CONSUMER_PROPERTIES( this->still
);
143 char *window_id
= mlt_properties_get( properties
, "window_id" );
144 char *audio_driver
= mlt_properties_get( properties
, "audio_driver" );
145 char *video_driver
= mlt_properties_get( properties
, "video_driver" );
146 char *audio_device
= mlt_properties_get( properties
, "audio_device" );
147 char *output_display
= mlt_properties_get( properties
, "output_display" );
148 int progressive
= mlt_properties_get_int( properties
, "progressive" ) | mlt_properties_get_int( properties
, "deinterlace" );
150 consumer_stop( parent
);
154 this->last_speed
= 1;
156 if ( output_display
!= NULL
)
157 setenv( "DISPLAY", output_display
, 1 );
159 if ( window_id
!= NULL
)
160 setenv( "SDL_WINDOWID", window_id
, 1 );
162 if ( video_driver
!= NULL
)
163 setenv( "SDL_VIDEODRIVER", video_driver
, 1 );
165 if ( audio_driver
!= NULL
)
166 setenv( "SDL_AUDIODRIVER", audio_driver
, 1 );
168 if ( audio_device
!= NULL
)
169 setenv( "AUDIODEV", audio_device
, 1 );
171 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_NOPARACHUTE
) < 0 )
173 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
177 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
178 SDL_EnableUNICODE( 1 );
180 // Pass properties down
181 mlt_properties_set_data( play
, "transport_producer", mlt_properties_get_data( properties
, "transport_producer", NULL
), 0, NULL
, NULL
);
182 mlt_properties_set_data( still
, "transport_producer", mlt_properties_get_data( properties
, "transport_producer", NULL
), 0, NULL
, NULL
);
183 mlt_properties_set_data( play
, "transport_callback", mlt_properties_get_data( properties
, "transport_callback", NULL
), 0, NULL
, NULL
);
184 mlt_properties_set_data( still
, "transport_callback", mlt_properties_get_data( properties
, "transport_callback", NULL
), 0, NULL
, NULL
);
186 mlt_properties_set_int( play
, "progressive", progressive
);
187 mlt_properties_set_int( still
, "progressive", progressive
);
189 mlt_properties_pass_list( play
, properties
, "resize,rescale,width,height,aspect_ratio,display_ratio,volume" );
190 mlt_properties_pass_list( still
, properties
, "resize,rescale,width,height,aspect_ratio,display_ratio" );
191 mlt_properties_pass_list( play
, properties
, "deinterlace_method" );
192 mlt_properties_pass_list( still
, properties
, "deinterlace_method" );
193 mlt_properties_pass_list( play
, properties
, "preview_off,preview_format" );
194 mlt_properties_pass_list( still
, properties
, "preview_off,preview_format" );
196 mlt_properties_pass( play
, properties
, "play." );
197 mlt_properties_pass( still
, properties
, "still." );
199 mlt_properties_set_data( play
, "app_lock", mlt_properties_get_data( properties
, "app_lock", NULL
), 0, NULL
, NULL
);
200 mlt_properties_set_data( still
, "app_lock", mlt_properties_get_data( properties
, "app_lock", NULL
), 0, NULL
, NULL
);
201 mlt_properties_set_data( play
, "app_unlock", mlt_properties_get_data( properties
, "app_unlock", NULL
), 0, NULL
, NULL
);
202 mlt_properties_set_data( still
, "app_unlock", mlt_properties_get_data( properties
, "app_unlock", NULL
), 0, NULL
, NULL
);
204 mlt_properties_set_int( play
, "put_mode", 1 );
205 mlt_properties_set_int( still
, "put_mode", 1 );
207 // Start the still producer just to initialise the gui
208 mlt_consumer_start( this->still
);
209 this->active
= this->still
;
211 // Inform child consumers that we control the sdl
212 mlt_properties_set_int( play
, "sdl_started", 1 );
213 mlt_properties_set_int( still
, "sdl_started", 1 );
215 pthread_create( &this->thread
, NULL
, consumer_thread
, this );
221 static int consumer_stop( mlt_consumer parent
)
223 // Get the actual object
224 consumer_sdl
this = parent
->child
;
226 if ( this->joined
== 0 )
228 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( parent
);
229 int app_locked
= mlt_properties_get_int( properties
, "app_locked" );
230 void ( *lock
)( void ) = mlt_properties_get_data( properties
, "app_lock", NULL
);
231 void ( *unlock
)( void ) = mlt_properties_get_data( properties
, "app_unlock", NULL
);
233 if ( app_locked
&& unlock
) unlock( );
235 // Kill the thread and clean up
238 pthread_mutex_lock( &this->refresh_mutex
);
239 pthread_cond_broadcast( &this->refresh_cond
);
240 pthread_mutex_unlock( &this->refresh_mutex
);
242 pthread_join( this->thread
, NULL
);
245 if ( app_locked
&& lock
) lock( );
253 static int consumer_is_stopped( mlt_consumer parent
)
255 consumer_sdl
this = parent
->child
;
256 return !this->running
;
259 static void *consumer_thread( void *arg
)
262 consumer_sdl
this = arg
;
265 mlt_consumer consumer
= &this->parent
;
267 // Get the properties
268 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( consumer
);
270 // internal intialization
272 mlt_frame frame
= NULL
;
273 int last_position
= -1;
275 // Determine if the application is dealing with the preview
276 int preview_off
= mlt_properties_get_int( properties
, "preview_off" );
278 this->refresh_count
= 0;
280 // Loop until told not to
281 while( this->running
)
283 // Get a frame from the attached producer
284 frame
= mlt_consumer_get_frame( consumer
);
286 // Ensure that we have a frame
287 if ( this->running
&& frame
!= NULL
)
289 // Get the speed of the frame
290 double speed
= mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame
), "_speed" );
292 // Lock during the operation
293 mlt_service_lock( MLT_CONSUMER_SERVICE( consumer
) );
295 // Get refresh request for the current frame
296 int refresh
= mlt_properties_get_int( properties
, "refresh" );
298 // Decrement refresh and clear changed
299 mlt_events_block( properties
, properties
);
300 mlt_properties_set_int( properties
, "refresh", 0 );
301 mlt_events_unblock( properties
, properties
);
303 // Unlock after the operation
304 mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer
) );
306 // Set the changed property on this frame for the benefit of still
307 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame
), "refresh", refresh
);
309 // Make sure the recipient knows that this frame isn't really rendered
310 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame
), "rendered", 0 );
312 // Optimisation to reduce latency
315 if ( last_position
!= -1 && last_position
+ 1 != mlt_frame_get_position( frame
) )
316 mlt_consumer_purge( this->play
);
317 last_position
= mlt_frame_get_position( frame
);
321 //mlt_consumer_purge( this->play );
325 // If we're not the first frame and both consumers are stopped, then stop ourselves
326 if ( !first
&& mlt_consumer_is_stopped( this->play
) && mlt_consumer_is_stopped( this->still
) )
329 mlt_frame_close( frame
);
331 // Allow a little grace time before switching consumers on speed changes
332 else if ( this->ignore_change
-- > 0 && this->active
!= NULL
&& !mlt_consumer_is_stopped( this->active
) )
334 mlt_consumer_put_frame( this->active
, frame
);
336 // If we aren't playing normally, then use the still
337 else if ( speed
!= 1 )
339 if ( !mlt_consumer_is_stopped( this->play
) )
340 mlt_consumer_stop( this->play
);
341 if ( mlt_consumer_is_stopped( this->still
) )
343 this->last_speed
= speed
;
344 this->active
= this->still
;
345 this->ignore_change
= 0;
346 mlt_consumer_start( this->still
);
348 mlt_consumer_put_frame( this->still
, frame
);
350 // Otherwise use the normal player
353 if ( !mlt_consumer_is_stopped( this->still
) )
354 mlt_consumer_stop( this->still
);
355 if ( mlt_consumer_is_stopped( this->play
) )
357 this->last_speed
= speed
;
358 this->active
= this->play
;
359 this->ignore_change
= 25;
360 mlt_consumer_start( this->play
);
362 mlt_consumer_put_frame( this->play
, frame
);
365 // Copy the rectangle info from the active consumer
366 if ( this->running
&& preview_off
== 0 )
368 mlt_properties active
= MLT_CONSUMER_PROPERTIES( this->active
);
369 mlt_service_lock( MLT_CONSUMER_SERVICE( consumer
) );
370 mlt_properties_set_int( properties
, "rect_x", mlt_properties_get_int( active
, "rect_x" ) );
371 mlt_properties_set_int( properties
, "rect_y", mlt_properties_get_int( active
, "rect_y" ) );
372 mlt_properties_set_int( properties
, "rect_w", mlt_properties_get_int( active
, "rect_w" ) );
373 mlt_properties_set_int( properties
, "rect_h", mlt_properties_get_int( active
, "rect_h" ) );
374 mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer
) );
377 if ( this->active
== this->still
)
379 pthread_mutex_lock( &this->refresh_mutex
);
380 if ( this->running
&& speed
== 0 && this->refresh_count
<= 0 )
381 pthread_cond_wait( &this->refresh_cond
, &this->refresh_mutex
);
382 this->refresh_count
--;
383 pthread_mutex_unlock( &this->refresh_mutex
);
386 // We are definitely not waiting on the first frame any more
391 if ( frame
) mlt_frame_close( frame
);
392 mlt_consumer_put_frame( this->active
, NULL
);
397 if ( this->play
) mlt_consumer_stop( this->play
);
398 if ( this->still
) mlt_consumer_stop( this->still
);
403 /** Callback to allow override of the close method.
406 static void consumer_close( mlt_consumer parent
)
408 // Get the actual object
409 consumer_sdl
this = parent
->child
;
412 mlt_consumer_stop( parent
);
414 // Close the child consumers
415 mlt_consumer_close( this->play
);
416 mlt_consumer_close( this->still
);
418 // Now clean up the rest
419 mlt_consumer_close( parent
);
421 // Finally clean up this