1 /*
2 * consumer_sdl_preview.c -- A Simple DirectMedia Layer consumer
3 * Copyright (C) 2004-2014 Meltytech, LLC
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 #include <framework/mlt_consumer.h>
21 #include <framework/mlt_frame.h>
22 #include <framework/mlt_factory.h>
23 #include <framework/mlt_producer.h>
24 #include <framework/mlt_log.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <pthread.h>
28 #include <SDL.h>
29 #include <SDL_syswm.h>
30 #include <sys/time.h>
31
32 extern pthread_mutex_t mlt_sdl_mutex;
33
34 typedef struct consumer_sdl_s *consumer_sdl;
35
36 struct consumer_sdl_s
37 {
38 struct mlt_consumer_s parent;
39 mlt_consumer active;
40 int ignore_change;
41 mlt_consumer play;
42 mlt_consumer still;
43 pthread_t thread;
44 int joined;
45 int running;
46 int sdl_flags;
47 double last_speed;
48 mlt_position last_position;
49
50 pthread_cond_t refresh_cond;
51 pthread_mutex_t refresh_mutex;
52 int refresh_count;
53 };
54
55 /** Forward references to static functions.
56 */
57
58 static int consumer_start( mlt_consumer parent );
59 static int consumer_stop( mlt_consumer parent );
60 static int consumer_is_stopped( mlt_consumer parent );
61 static void consumer_purge( mlt_consumer parent );
62 static void consumer_close( mlt_consumer parent );
63 static void *consumer_thread( void * );
64 static void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer self, mlt_frame frame );
65 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer self, SDL_Event *event );
66 static void consumer_refresh_cb( mlt_consumer sdl, mlt_consumer self, char *name );
67
consumer_sdl_preview_init(mlt_profile profile,mlt_service_type type,const char * id,char * arg)68 mlt_consumer consumer_sdl_preview_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
69 {
70 consumer_sdl self = calloc( 1, sizeof( struct consumer_sdl_s ) );
71 if ( self != NULL && mlt_consumer_init( &self->parent, self, profile ) == 0 )
72 {
73 // Get the parent consumer object
74 mlt_consumer parent = &self->parent;
75
76 // Get the properties
77 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
78
79 // Get the width and height
80 int width = mlt_properties_get_int( properties, "width" );
81 int height = mlt_properties_get_int( properties, "height" );
82
83 // Process actual param
84 if ( arg == NULL || sscanf( arg, "%dx%d", &width, &height ) == 2 )
85 {
86 mlt_properties_set_int( properties, "width", width );
87 mlt_properties_set_int( properties, "height", height );
88 }
89
90 // Create child consumers
91 self->play = mlt_factory_consumer( profile, "sdl", arg );
92 self->still = mlt_factory_consumer( profile, "sdl_still", arg );
93 mlt_properties_set( properties, "rescale", "nearest" );
94 mlt_properties_set( properties, "deinterlace_method", "onefield" );
95 mlt_properties_set_int( properties, "prefill", 1 );
96 mlt_properties_set_int( properties, "top_field_first", -1 );
97
98 parent->close = consumer_close;
99 parent->start = consumer_start;
100 parent->stop = consumer_stop;
101 parent->is_stopped = consumer_is_stopped;
102 parent->purge = consumer_purge;
103 self->joined = 1;
104 mlt_events_listen( MLT_CONSUMER_PROPERTIES( self->play ), self, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
105 mlt_events_listen( MLT_CONSUMER_PROPERTIES( self->still ), self, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
106 mlt_events_listen( MLT_CONSUMER_PROPERTIES( self->play ), self, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
107 mlt_events_listen( MLT_CONSUMER_PROPERTIES( self->still ), self, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
108 pthread_cond_init( &self->refresh_cond, NULL );
109 pthread_mutex_init( &self->refresh_mutex, NULL );
110 mlt_events_listen( MLT_CONSUMER_PROPERTIES( parent ), self, "property-changed", ( mlt_listener )consumer_refresh_cb );
111 mlt_events_register( properties, "consumer-sdl-paused", NULL );
112 return parent;
113 }
114 free( self );
115 return NULL;
116 }
117
consumer_frame_show_cb(mlt_consumer sdl,mlt_consumer parent,mlt_frame frame)118 void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer parent, mlt_frame frame )
119 {
120 consumer_sdl self = parent->child;
121 self->last_speed = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" );
122 self->last_position = mlt_frame_get_position( frame );
123 mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent ), "consumer-frame-show", frame, NULL );
124 }
125
consumer_sdl_event_cb(mlt_consumer sdl,mlt_consumer parent,SDL_Event * event)126 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer parent, SDL_Event *event )
127 {
128 mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent ), "consumer-sdl-event", event, NULL );
129 }
130
consumer_refresh_cb(mlt_consumer sdl,mlt_consumer parent,char * name)131 static void consumer_refresh_cb( mlt_consumer sdl, mlt_consumer parent, char *name )
132 {
133 if ( !strcmp( name, "refresh" ) )
134 {
135 consumer_sdl self = parent->child;
136 pthread_mutex_lock( &self->refresh_mutex );
137 self->refresh_count = self->refresh_count <= 0 ? 1 : self->refresh_count + 1;
138 pthread_cond_broadcast( &self->refresh_cond );
139 pthread_mutex_unlock( &self->refresh_mutex );
140 }
141 }
142
consumer_start(mlt_consumer parent)143 static int consumer_start( mlt_consumer parent )
144 {
145 consumer_sdl self = parent->child;
146
147 if ( !self->running )
148 {
149 // properties
150 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
151 mlt_properties play = MLT_CONSUMER_PROPERTIES( self->play );
152 mlt_properties still = MLT_CONSUMER_PROPERTIES( self->still );
153
154 char *window_id = mlt_properties_get( properties, "window_id" );
155 char *audio_driver = mlt_properties_get( properties, "audio_driver" );
156 char *video_driver = mlt_properties_get( properties, "video_driver" );
157 char *audio_device = mlt_properties_get( properties, "audio_device" );
158 char *output_display = mlt_properties_get( properties, "output_display" );
159 int progressive = mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" );
160
161 consumer_stop( parent );
162
163 self->running = 1;
164 self->joined = 0;
165 self->last_speed = 1;
166
167 if ( output_display != NULL )
168 setenv( "DISPLAY", output_display, 1 );
169
170 if ( window_id != NULL )
171 setenv( "SDL_WINDOWID", window_id, 1 );
172
173 if ( video_driver != NULL )
174 setenv( "SDL_VIDEODRIVER", video_driver, 1 );
175
176 if ( audio_driver != NULL )
177 setenv( "SDL_AUDIODRIVER", audio_driver, 1 );
178
179 if ( audio_device != NULL )
180 setenv( "AUDIODEV", audio_device, 1 );
181
182 pthread_mutex_lock( &mlt_sdl_mutex );
183 int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
184 pthread_mutex_unlock( &mlt_sdl_mutex );
185 if ( ret < 0 )
186 {
187 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
188 return -1;
189 }
190
191 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
192 SDL_EnableUNICODE( 1 );
193
194 // Pass properties down
195 mlt_properties_set_data( play, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
196 mlt_properties_set_data( still, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
197 mlt_properties_set_data( play, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
198 mlt_properties_set_data( still, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
199
200 mlt_properties_set_int( play, "progressive", progressive );
201 mlt_properties_set_int( still, "progressive", progressive );
202
203 mlt_properties_pass_list( play, properties,
204 "deinterlace_method,resize,rescale,width,height,aspect_ratio,display_ratio,preview_off,preview_format,window_background"
205 ",top_field_first,volume,real_time,buffer,prefill,audio_off,frequency,drop_max" );
206 mlt_properties_pass_list( still, properties,
207 "deinterlace_method,resize,rescale,width,height,aspect_ratio,display_ratio,preview_off,preview_format,window_background"
208 ",top_field_first");
209
210 mlt_properties_pass( play, properties, "play." );
211 mlt_properties_pass( still, properties, "still." );
212
213 mlt_properties_set_data( play, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
214 mlt_properties_set_data( still, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
215 mlt_properties_set_data( play, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
216 mlt_properties_set_data( still, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
217
218 mlt_properties_set_int( play, "put_mode", 1 );
219 mlt_properties_set_int( still, "put_mode", 1 );
220 mlt_properties_set_int( play, "terminate_on_pause", 1 );
221
222 // Start the still producer just to initialise the gui
223 mlt_consumer_start( self->still );
224 self->active = self->still;
225
226 // Inform child consumers that we control the sdl
227 mlt_properties_set_int( play, "sdl_started", 1 );
228 mlt_properties_set_int( still, "sdl_started", 1 );
229
230 pthread_create( &self->thread, NULL, consumer_thread, self );
231 }
232
233 return 0;
234 }
235
consumer_stop(mlt_consumer parent)236 static int consumer_stop( mlt_consumer parent )
237 {
238 // Get the actual object
239 consumer_sdl self = parent->child;
240
241 if ( self->joined == 0 )
242 {
243 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
244 int app_locked = mlt_properties_get_int( properties, "app_locked" );
245 void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
246 void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
247
248 if ( app_locked && unlock ) unlock( );
249
250 // Kill the thread and clean up
251 self->running = 0;
252
253 pthread_mutex_lock( &self->refresh_mutex );
254 pthread_cond_broadcast( &self->refresh_cond );
255 pthread_mutex_unlock( &self->refresh_mutex );
256 #ifndef _WIN32
257 if ( self->thread )
258 #endif
259 pthread_join( self->thread, NULL );
260 self->joined = 1;
261
262 if ( app_locked && lock ) lock( );
263
264 pthread_mutex_lock( &mlt_sdl_mutex );
265 SDL_Quit( );
266 pthread_mutex_unlock( &mlt_sdl_mutex );
267 }
268
269 return 0;
270 }
271
consumer_is_stopped(mlt_consumer parent)272 static int consumer_is_stopped( mlt_consumer parent )
273 {
274 consumer_sdl self = parent->child;
275 return !self->running;
276 }
277
consumer_purge(mlt_consumer parent)278 void consumer_purge( mlt_consumer parent )
279 {
280 consumer_sdl self = parent->child;
281 if ( self->running )
282 mlt_consumer_purge( self->play );
283 }
284
consumer_thread(void * arg)285 static void *consumer_thread( void *arg )
286 {
287 // Identify the arg
288 consumer_sdl self = arg;
289
290 // Get the consumer
291 mlt_consumer consumer = &self->parent;
292
293 // Get the properties
294 mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
295
296 // internal initialization
297 mlt_frame frame = NULL;
298 int last_position = -1;
299 int eos = 0;
300 int eos_threshold = 20;
301 if ( self->play )
302 eos_threshold = eos_threshold + mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( self->play ), "buffer" );
303
304 // Determine if the application is dealing with the preview
305 int preview_off = mlt_properties_get_int( properties, "preview_off" );
306
307 pthread_mutex_lock( &self->refresh_mutex );
308 self->refresh_count = 0;
309 pthread_mutex_unlock( &self->refresh_mutex );
310
311 // Loop until told not to
312 while( self->running )
313 {
314 // Get a frame from the attached producer
315 frame = mlt_consumer_get_frame( consumer );
316
317 // Ensure that we have a frame
318 if ( self->running && frame != NULL )
319 {
320 // Get the speed of the frame
321 double speed = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" );
322
323 // Lock during the operation
324 mlt_service_lock( MLT_CONSUMER_SERVICE( consumer ) );
325
326 // Get refresh request for the current frame
327 int refresh = mlt_properties_get_int( properties, "refresh" );
328
329 // Decrement refresh and clear changed
330 mlt_events_block( properties, properties );
331 mlt_properties_set_int( properties, "refresh", 0 );
332 mlt_events_unblock( properties, properties );
333
334 // Unlock after the operation
335 mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer ) );
336
337 // Set the changed property on this frame for the benefit of still
338 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "refresh", refresh );
339
340 // Make sure the recipient knows that this frame isn't really rendered
341 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 0 );
342
343 // Optimisation to reduce latency
344 if ( speed == 1.0 )
345 {
346 if ( last_position != -1 && last_position + 1 != mlt_frame_get_position( frame ) )
347 mlt_consumer_purge( self->play );
348 last_position = mlt_frame_get_position( frame );
349 }
350 else
351 {
352 //mlt_consumer_purge( self->play );
353 last_position = -1;
354 }
355
356 // If we aren't playing normally, then use the still
357 if ( speed != 1 )
358 {
359 mlt_producer producer = MLT_PRODUCER( mlt_service_get_producer( MLT_CONSUMER_SERVICE( consumer ) ) );
360 mlt_position duration = producer? mlt_producer_get_playtime( producer ) : -1;
361 int pause = 0;
362
363 #ifndef SKIP_WAIT_EOS
364 if ( self->active == self->play )
365 {
366 // Do not interrupt the play consumer near the end
367 if ( duration - self->last_position > eos_threshold )
368 {
369 // Get a new frame at the sought position
370 mlt_frame_close( frame );
371 if ( producer )
372 mlt_producer_seek( producer, self->last_position );
373 frame = mlt_consumer_get_frame( consumer );
374 pause = 1;
375 }
376 else
377 {
378 // Send frame with speed 0 to stop it
379 if ( frame && !mlt_consumer_is_stopped( self->play ) )
380 {
381 mlt_consumer_put_frame( self->play, frame );
382 frame = NULL;
383 eos = 1;
384 }
385
386 // Check for end of stream
387 if ( mlt_consumer_is_stopped( self->play ) )
388 {
389 // Stream has ended
390 mlt_log_verbose( MLT_CONSUMER_SERVICE( consumer ), "END OF STREAM\n" );
391 pause = 1;
392 eos = 0; // reset eos indicator
393 }
394 else
395 {
396 // Prevent a tight busy loop
397 struct timespec tm = { 0, 100000L }; // 100 usec
398 nanosleep( &tm, NULL );
399 }
400 }
401 }
402 #else
403 pause = self->active == self->play;
404 #endif
405 if ( pause )
406 {
407 // Start the still consumer
408 if ( !mlt_consumer_is_stopped( self->play ) )
409 mlt_consumer_stop( self->play );
410 self->last_speed = speed;
411 self->active = self->still;
412 self->ignore_change = 0;
413 mlt_consumer_start( self->still );
414 }
415 // Send the frame to the active child
416 if ( frame && !eos )
417 {
418 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "refresh", 1 );
419 if ( self->active )
420 mlt_consumer_put_frame( self->active, frame );
421 }
422 if ( pause && speed == 0.0 )
423 {
424 mlt_events_fire( properties, "consumer-sdl-paused", NULL );
425 }
426 }
427 // Allow a little grace time before switching consumers on speed changes
428 else if ( self->ignore_change -- > 0 && self->active != NULL && !mlt_consumer_is_stopped( self->active ) )
429 {
430 mlt_consumer_put_frame( self->active, frame );
431 }
432 // Otherwise use the normal player
433 else
434 {
435 if ( !mlt_consumer_is_stopped( self->still ) )
436 mlt_consumer_stop( self->still );
437 if ( mlt_consumer_is_stopped( self->play ) )
438 {
439 self->last_speed = speed;
440 self->active = self->play;
441 self->ignore_change = 0;
442 mlt_consumer_start( self->play );
443 }
444 if ( self->play )
445 mlt_consumer_put_frame( self->play, frame );
446 }
447
448 // Copy the rectangle info from the active consumer
449 if ( self->running && preview_off == 0 && self->active )
450 {
451 mlt_properties active = MLT_CONSUMER_PROPERTIES( self->active );
452 mlt_service_lock( MLT_CONSUMER_SERVICE( consumer ) );
453 mlt_properties_set_int( properties, "rect_x", mlt_properties_get_int( active, "rect_x" ) );
454 mlt_properties_set_int( properties, "rect_y", mlt_properties_get_int( active, "rect_y" ) );
455 mlt_properties_set_int( properties, "rect_w", mlt_properties_get_int( active, "rect_w" ) );
456 mlt_properties_set_int( properties, "rect_h", mlt_properties_get_int( active, "rect_h" ) );
457 mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer ) );
458 }
459
460 if ( self->active == self->still )
461 {
462 pthread_mutex_lock( &self->refresh_mutex );
463 if ( self->running && speed == 0 && self->refresh_count <= 0 )
464 {
465 mlt_events_fire( properties, "consumer-sdl-paused", NULL );
466 pthread_cond_wait( &self->refresh_cond, &self->refresh_mutex );
467 }
468 self->refresh_count --;
469 pthread_mutex_unlock( &self->refresh_mutex );
470 }
471 }
472 else
473 {
474 if ( frame ) mlt_frame_close( frame );
475 mlt_consumer_put_frame( self->active, NULL );
476 self->running = 0;
477 }
478 }
479
480 if ( self->play ) mlt_consumer_stop( self->play );
481 if ( self->still ) mlt_consumer_stop( self->still );
482
483 return NULL;
484 }
485
486 /** Callback to allow override of the close method.
487 */
488
consumer_close(mlt_consumer parent)489 static void consumer_close( mlt_consumer parent )
490 {
491 // Get the actual object
492 consumer_sdl self = parent->child;
493
494 // Stop the consumer
495 mlt_consumer_stop( parent );
496
497 // Close the child consumers
498 mlt_consumer_close( self->play );
499 mlt_consumer_close( self->still );
500
501 // Now clean up the rest
502 mlt_consumer_close( parent );
503
504 // Finally clean up self
505 free( self );
506 }
507