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 );
80 void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer parent, mlt_frame frame )
82 consumer_sdl this = parent->child;
83 this->last_speed = mlt_properties_get_double( mlt_frame_properties( frame ), "_speed" );
84 mlt_events_fire( mlt_consumer_properties( parent ), "consumer-frame-show", frame, NULL );
87 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer parent, SDL_Event *event )
89 mlt_events_fire( mlt_consumer_properties( parent ), "consumer-sdl-event", event, NULL );
92 static int consumer_start( mlt_consumer parent )
94 consumer_sdl this = parent->child;
98 pthread_attr_t thread_attributes;
100 consumer_stop( parent );
104 this->last_speed = 1;
106 // Inherit the scheduling priority
107 pthread_attr_init( &thread_attributes );
108 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
110 pthread_create( &this->thread, &thread_attributes, consumer_thread, this );
116 static int consumer_stop( mlt_consumer parent )
118 // Get the actual object
119 consumer_sdl this = parent->child;
121 if ( this->joined == 0 )
123 // Kill the thread and clean up
126 pthread_join( this->thread, NULL );
133 static int consumer_is_stopped( mlt_consumer parent )
135 consumer_sdl this = parent->child;
136 return !this->running;
139 static void *consumer_thread( void *arg )
142 consumer_sdl this = arg;
145 mlt_consumer consumer = &this->parent;
147 // internal intialization
149 mlt_frame frame = NULL;
152 mlt_properties properties = mlt_consumer_properties( consumer );
153 mlt_properties play = mlt_consumer_properties( this->play );
154 mlt_properties still = mlt_consumer_properties( this->still );
156 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
158 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
162 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
163 SDL_EnableUNICODE( 1 );
165 // Inform child consumers that we control the sdl
166 mlt_properties_set_int( play, "sdl_started", 1 );
167 mlt_properties_set_int( still, "sdl_started", 1 );
169 // Pass properties down
170 mlt_properties_set_data( play, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
171 mlt_properties_set_data( still, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
172 mlt_properties_set_data( play, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
173 mlt_properties_set_data( still, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
174 mlt_properties_set( play, "rescale", mlt_properties_get( properties, "rescale" ) );
175 mlt_properties_set( still, "rescale", mlt_properties_get( properties, "rescale" ) );
176 mlt_properties_set( play, "width", mlt_properties_get( properties, "width" ) );
177 mlt_properties_set( still, "width", mlt_properties_get( properties, "width" ) );
178 mlt_properties_set( play, "height", mlt_properties_get( properties, "height" ) );
179 mlt_properties_set( still, "height", mlt_properties_get( properties, "height" ) );
181 mlt_properties_pass( play, mlt_consumer_properties( consumer ), "play." );
182 mlt_properties_pass( still, mlt_consumer_properties( consumer ), "still." );
184 mlt_properties_set_data( play, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
185 mlt_properties_set_data( still, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
186 mlt_properties_set_data( play, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
187 mlt_properties_set_data( still, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
189 mlt_properties_set_int( play, "put_mode", 1 );
190 mlt_properties_set_int( still, "put_mode", 1 );
192 // Loop until told not to
193 while( this->running )
195 // Get a frame from the attached producer
196 frame = mlt_consumer_get_frame( consumer );
198 // Ensure that we have a frame
201 // Get the speed of the frame
202 double speed = mlt_properties_get_double( mlt_frame_properties( frame ), "_speed" );
204 // Determine which speed to use
205 double use_speed = first ? speed : this->last_speed;
207 // Get changed requests to the preview
208 int changed = mlt_properties_get_int( properties, "changed" );
209 mlt_properties_set_int( properties, "changed", 0 );
211 // Make sure the recipient knows that this frame isn't really rendered
212 mlt_properties_set_int( mlt_frame_properties( frame ), "rendered", 0 );
214 if ( !first && mlt_consumer_is_stopped( this->play ) && mlt_consumer_is_stopped( this->still ) )
217 mlt_frame_close( frame );
219 else if ( this->ignore_change -- > 0 && this->active != NULL && !mlt_consumer_is_stopped( this->active ) )
221 mlt_consumer_put_frame( this->active, frame );
222 if ( this->active == this->still )
223 mlt_properties_set_int( still, "changed", changed );
225 else if ( use_speed != 1 )
227 if ( !mlt_consumer_is_stopped( this->play ) )
229 mlt_consumer_stop( this->play );
231 if ( mlt_consumer_is_stopped( this->still ) )
233 this->last_speed = use_speed;
234 this->active = this->still;
235 this->ignore_change = 5;
236 mlt_consumer_start( this->still );
238 mlt_properties_set_int( still, "changed", changed );
239 mlt_consumer_put_frame( this->still, frame );
243 if ( !mlt_consumer_is_stopped( this->still ) )
245 mlt_consumer_stop( this->still );
247 if ( mlt_consumer_is_stopped( this->play ) )
249 this->last_speed = use_speed;
250 this->active = this->play;
251 this->ignore_change = 25;
252 mlt_consumer_start( this->play );
254 mlt_consumer_put_frame( this->play, frame );
260 mlt_consumer_stop( this->play );
261 mlt_consumer_stop( this->still );
268 /** Callback to allow override of the close method.
271 static void consumer_close( mlt_consumer parent )
273 // Get the actual object
274 consumer_sdl this = parent->child;
277 mlt_consumer_stop( parent );
279 // Now clean up the rest
280 mlt_consumer_close( parent );
282 // Close the child consumers
283 mlt_consumer_close( this->play );
284 mlt_consumer_close( this->still );
286 // Finally clean up this