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;
64 this->play = mlt_factory_consumer( "sdl", arg );
65 this->still = mlt_factory_consumer( "sdl_still", arg );
66 mlt_properties_set( mlt_consumer_properties( parent ), "real_time", "0" );
67 parent->close = consumer_close;
68 parent->start = consumer_start;
69 parent->stop = consumer_stop;
70 parent->is_stopped = consumer_is_stopped;
72 mlt_events_listen( mlt_consumer_properties( this->play ), this, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
73 mlt_events_listen( mlt_consumer_properties( this->still ), this, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
74 mlt_events_listen( mlt_consumer_properties( this->play ), this, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
75 mlt_events_listen( mlt_consumer_properties( this->still ), this, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
82 void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer parent, mlt_frame frame )
84 consumer_sdl this = parent->child;
85 this->last_speed = mlt_properties_get_double( mlt_frame_properties( frame ), "_speed" );
86 mlt_events_fire( mlt_consumer_properties( parent ), "consumer-frame-show", frame, NULL );
89 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer parent, SDL_Event *event )
91 mlt_events_fire( mlt_consumer_properties( parent ), "consumer-sdl-event", event, NULL );
94 static int consumer_start( mlt_consumer parent )
96 consumer_sdl this = parent->child;
100 pthread_attr_t thread_attributes;
102 consumer_stop( parent );
106 this->last_speed = 1;
108 // Inherit the scheduling priority
109 pthread_attr_init( &thread_attributes );
110 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
112 pthread_create( &this->thread, &thread_attributes, consumer_thread, this );
118 static int consumer_stop( mlt_consumer parent )
120 // Get the actual object
121 consumer_sdl this = parent->child;
123 if ( this->joined == 0 )
125 // Kill the thread and clean up
128 pthread_join( this->thread, NULL );
135 static int consumer_is_stopped( mlt_consumer parent )
137 consumer_sdl this = parent->child;
138 return !this->running;
141 static void *consumer_thread( void *arg )
144 consumer_sdl this = arg;
147 mlt_consumer consumer = &this->parent;
149 // internal intialization
151 mlt_frame frame = NULL;
154 mlt_properties properties = mlt_consumer_properties( consumer );
155 mlt_properties play = mlt_consumer_properties( this->play );
156 mlt_properties still = mlt_consumer_properties( this->still );
158 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
160 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
164 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
165 SDL_EnableUNICODE( 1 );
167 // Inform child consumers that we control the sdl
168 mlt_properties_set_int( play, "sdl_started", 1 );
169 mlt_properties_set_int( still, "sdl_started", 1 );
171 // Pass properties down
172 mlt_properties_set_data( play, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
173 mlt_properties_set_data( still, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
174 mlt_properties_set_data( play, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
175 mlt_properties_set_data( still, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
176 mlt_properties_set( play, "rescale", mlt_properties_get( properties, "rescale" ) );
177 mlt_properties_set( still, "rescale", mlt_properties_get( properties, "rescale" ) );
178 mlt_properties_set( play, "width", mlt_properties_get( properties, "width" ) );
179 mlt_properties_set( still, "width", mlt_properties_get( properties, "width" ) );
180 mlt_properties_set( play, "height", mlt_properties_get( properties, "height" ) );
181 mlt_properties_set( still, "height", mlt_properties_get( properties, "height" ) );
183 mlt_properties_pass( play, mlt_consumer_properties( consumer ), "play." );
184 mlt_properties_pass( still, mlt_consumer_properties( consumer ), "still." );
186 mlt_properties_set_data( play, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
187 mlt_properties_set_data( still, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
188 mlt_properties_set_data( play, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
189 mlt_properties_set_data( still, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
191 mlt_properties_set_int( play, "put_mode", 1 );
192 mlt_properties_set_int( still, "put_mode", 1 );
194 // Loop until told not to
195 while( this->running )
197 // Get a frame from the attached producer
198 frame = mlt_consumer_get_frame( consumer );
200 // Ensure that we have a frame
203 // Get the speed of the frame
204 double speed = mlt_properties_get_double( mlt_frame_properties( frame ), "_speed" );
206 // Determine which speed to use
207 double use_speed = first ? speed : this->last_speed;
209 // Get changed requests to the preview (focus changes)
210 int changed = mlt_properties_get_int( properties, "changed" );
212 // Get refresh request for the current frame (effect changes in still mode)
213 int refresh = mlt_properties_get_int( properties, "refresh" );
215 // Decrement refresh and clear changed
216 mlt_properties_set_int( properties, "refresh", refresh > 0 ? refresh - 1 : 0 );
217 mlt_properties_set_int( properties, "changed", 0 );
219 // Set the changed property on this frame for the benefit of still
220 mlt_properties_set_int( mlt_frame_properties( frame ), "refresh", refresh );
222 // Make sure the recipient knows that this frame isn't really rendered
223 mlt_properties_set_int( mlt_frame_properties( frame ), "rendered", 0 );
225 // If we're not the first frame and both consumers are stopped, then stop ourselves
226 if ( !first && mlt_consumer_is_stopped( this->play ) && mlt_consumer_is_stopped( this->still ) )
229 mlt_frame_close( frame );
231 // Allow a little grace time before switching consumers on speed changes
232 else if ( this->ignore_change -- > 0 && this->active != NULL && !mlt_consumer_is_stopped( this->active ) )
234 mlt_consumer_put_frame( this->active, frame );
235 mlt_properties_set_int( still, "changed", changed );
237 // If we aren't playing normally, then use the still
238 else if ( use_speed != 1 )
240 if ( !mlt_consumer_is_stopped( this->play ) )
241 mlt_consumer_stop( this->play );
242 if ( mlt_consumer_is_stopped( this->still ) )
244 this->last_speed = use_speed;
245 this->active = this->still;
246 this->ignore_change = 5;
247 mlt_consumer_start( this->still );
249 mlt_properties_set_int( still, "changed", changed );
250 mlt_consumer_put_frame( this->still, frame );
252 // Otherwise use the normal player
255 if ( !mlt_consumer_is_stopped( this->still ) )
256 mlt_consumer_stop( this->still );
257 if ( mlt_consumer_is_stopped( this->play ) )
259 this->last_speed = use_speed;
260 this->active = this->play;
261 this->ignore_change = 25;
262 mlt_consumer_start( this->play );
264 mlt_properties_set_int( still, "changed", changed );
265 mlt_consumer_put_frame( this->play, frame );
268 // Copy the rectangle info from the active consumer
271 mlt_properties active = mlt_consumer_properties( this->active );
272 mlt_properties_set_int( properties, "rect_x", mlt_properties_get_int( active, "rect_x" ) );
273 mlt_properties_set_int( properties, "rect_y", mlt_properties_get_int( active, "rect_y" ) );
274 mlt_properties_set_int( properties, "rect_w", mlt_properties_get_int( active, "rect_w" ) );
275 mlt_properties_set_int( properties, "rect_h", mlt_properties_get_int( active, "rect_h" ) );
278 // We are definitely not waiting on the first frame any more
283 mlt_consumer_stop( this->play );
284 mlt_consumer_stop( this->still );
291 /** Callback to allow override of the close method.
294 static void consumer_close( mlt_consumer parent )
296 // Get the actual object
297 consumer_sdl this = parent->child;
300 mlt_consumer_stop( parent );
302 // Now clean up the rest
303 mlt_consumer_close( parent );
305 // Close the child consumers
306 mlt_consumer_close( this->play );
307 mlt_consumer_close( this->still );
309 // Finally clean up this