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 parent->close = consumer_close;
84 parent->start = consumer_start;
85 parent->stop = consumer_stop;
86 parent->is_stopped = consumer_is_stopped;
88 mlt_events_listen( mlt_consumer_properties( this->play ), this, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
89 mlt_events_listen( mlt_consumer_properties( this->still ), this, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
90 mlt_events_listen( mlt_consumer_properties( this->play ), this, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
91 mlt_events_listen( mlt_consumer_properties( this->still ), this, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
98 void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer parent, mlt_frame frame )
100 consumer_sdl this = parent->child;
101 this->last_speed = mlt_properties_get_double( mlt_frame_properties( frame ), "_speed" );
102 mlt_events_fire( mlt_consumer_properties( parent ), "consumer-frame-show", frame, NULL );
105 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer parent, SDL_Event *event )
107 mlt_events_fire( mlt_consumer_properties( parent ), "consumer-sdl-event", event, NULL );
110 static int consumer_start( mlt_consumer parent )
112 consumer_sdl this = parent->child;
114 if ( !this->running )
116 pthread_attr_t thread_attributes;
118 consumer_stop( parent );
122 this->last_speed = 1;
124 // Inherit the scheduling priority
125 pthread_attr_init( &thread_attributes );
126 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
128 pthread_create( &this->thread, &thread_attributes, consumer_thread, this );
134 static int consumer_stop( mlt_consumer parent )
136 // Get the actual object
137 consumer_sdl this = parent->child;
139 if ( this->joined == 0 )
141 // Kill the thread and clean up
144 pthread_join( this->thread, NULL );
151 static int consumer_is_stopped( mlt_consumer parent )
153 consumer_sdl this = parent->child;
154 return !this->running;
157 static void *consumer_thread( void *arg )
160 consumer_sdl this = arg;
163 mlt_consumer consumer = &this->parent;
165 // internal intialization
167 mlt_frame frame = NULL;
170 mlt_properties properties = mlt_consumer_properties( consumer );
171 mlt_properties play = mlt_consumer_properties( this->play );
172 mlt_properties still = mlt_consumer_properties( this->still );
174 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
176 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
180 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
181 SDL_EnableUNICODE( 1 );
183 // Inform child consumers that we control the sdl
184 mlt_properties_set_int( play, "sdl_started", 1 );
185 mlt_properties_set_int( still, "sdl_started", 1 );
187 // Pass properties down
188 mlt_properties_set_data( play, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
189 mlt_properties_set_data( still, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
190 mlt_properties_set_data( play, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
191 mlt_properties_set_data( still, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
192 mlt_properties_set( play, "rescale", mlt_properties_get( properties, "rescale" ) );
193 mlt_properties_set( still, "rescale", mlt_properties_get( properties, "rescale" ) );
194 mlt_properties_set( play, "width", mlt_properties_get( properties, "width" ) );
195 mlt_properties_set( still, "width", mlt_properties_get( properties, "width" ) );
196 mlt_properties_set( play, "height", mlt_properties_get( properties, "height" ) );
197 mlt_properties_set( still, "height", mlt_properties_get( properties, "height" ) );
199 mlt_properties_pass( play, mlt_consumer_properties( consumer ), "play." );
200 mlt_properties_pass( still, mlt_consumer_properties( consumer ), "still." );
202 mlt_properties_set_data( play, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
203 mlt_properties_set_data( still, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
204 mlt_properties_set_data( play, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
205 mlt_properties_set_data( still, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
207 mlt_properties_set_int( play, "progressive", 1 );
208 mlt_properties_set_int( still, "progressive", 1 );
210 mlt_properties_set_int( play, "put_mode", 1 );
211 mlt_properties_set_int( still, "put_mode", 1 );
213 // Loop until told not to
214 while( this->running )
216 // Get a frame from the attached producer
217 frame = mlt_consumer_get_frame( consumer );
219 // Ensure that we have a frame
222 // Get the speed of the frame
223 double speed = mlt_properties_get_double( mlt_frame_properties( frame ), "_speed" );
225 // Determine which speed to use
226 double use_speed = first ? speed : this->last_speed;
228 // Get changed requests to the preview (focus changes)
229 int changed = mlt_properties_get_int( properties, "changed" );
231 // Get refresh request for the current frame (effect changes in still mode)
232 int refresh = mlt_properties_get_int( properties, "refresh" );
234 // Decrement refresh and clear changed
235 mlt_properties_set_int( properties, "refresh", refresh > 0 ? refresh - 1 : 0 );
236 mlt_properties_set_int( properties, "changed", 0 );
238 // Set the changed property on this frame for the benefit of still
239 mlt_properties_set_int( mlt_frame_properties( frame ), "refresh", refresh );
241 // Make sure the recipient knows that this frame isn't really rendered
242 mlt_properties_set_int( mlt_frame_properties( frame ), "rendered", 0 );
244 // If we're not the first frame and both consumers are stopped, then stop ourselves
245 if ( !first && mlt_consumer_is_stopped( this->play ) && mlt_consumer_is_stopped( this->still ) )
248 mlt_frame_close( frame );
250 // Allow a little grace time before switching consumers on speed changes
251 else if ( this->ignore_change -- > 0 && this->active != NULL && !mlt_consumer_is_stopped( this->active ) )
253 mlt_consumer_put_frame( this->active, frame );
254 mlt_properties_set_int( still, "changed", changed );
256 // If we aren't playing normally, then use the still
257 else if ( use_speed != 1 )
259 if ( !mlt_consumer_is_stopped( this->play ) )
260 mlt_consumer_stop( this->play );
261 if ( mlt_consumer_is_stopped( this->still ) )
263 this->last_speed = use_speed;
264 this->active = this->still;
265 mlt_consumer_start( this->still );
267 mlt_properties_set_int( still, "changed", changed );
268 mlt_consumer_put_frame( this->still, frame );
270 // Otherwise use the normal player
273 if ( !mlt_consumer_is_stopped( this->still ) )
274 mlt_consumer_stop( this->still );
275 if ( mlt_consumer_is_stopped( this->play ) )
277 this->last_speed = use_speed;
278 this->active = this->play;
279 this->ignore_change = 25;
280 mlt_consumer_start( this->play );
282 mlt_properties_set_int( still, "changed", changed );
283 mlt_consumer_put_frame( this->play, frame );
286 // Copy the rectangle info from the active consumer
289 mlt_properties active = mlt_consumer_properties( this->active );
290 mlt_properties_set_int( properties, "rect_x", mlt_properties_get_int( active, "rect_x" ) );
291 mlt_properties_set_int( properties, "rect_y", mlt_properties_get_int( active, "rect_y" ) );
292 mlt_properties_set_int( properties, "rect_w", mlt_properties_get_int( active, "rect_w" ) );
293 mlt_properties_set_int( properties, "rect_h", mlt_properties_get_int( active, "rect_h" ) );
296 // We are definitely not waiting on the first frame any more
301 mlt_consumer_stop( this->play );
302 mlt_consumer_stop( this->still );
309 /** Callback to allow override of the close method.
312 static void consumer_close( mlt_consumer parent )
314 // Get the actual object
315 consumer_sdl this = parent->child;
318 mlt_consumer_stop( parent );
320 // Now clean up the rest
321 mlt_consumer_close( parent );
323 // Close the child consumers
324 mlt_consumer_close( this->play );
325 mlt_consumer_close( this->still );
327 // Finally clean up this