2 * mlt_consumer.c -- abstraction for all consumer services
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
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.
22 #include "mlt_consumer.h"
23 #include "mlt_factory.h"
24 #include "mlt_producer.h"
25 #include "mlt_frame.h"
31 static void mlt_consumer_frame_show( mlt_listener listener
, mlt_properties owner
, mlt_service
this, void **args
);
33 /** Public final methods
36 int mlt_consumer_init( mlt_consumer
this, void *child
)
39 memset( this, 0, sizeof( struct mlt_consumer_s
) );
41 error
= mlt_service_init( &this->parent
, this );
44 // Get the properties from the service
45 mlt_properties properties
= MLT_SERVICE_PROPERTIES( &this->parent
);
47 // Get the normalisation preference
48 char *normalisation
= mlt_environment( "MLT_NORMALISATION" );
50 // Deal with normalisation
51 if ( normalisation
== NULL
|| strcmp( normalisation
, "NTSC" ) )
53 mlt_properties_set( properties
, "normalisation", "PAL" );
54 mlt_properties_set_double( properties
, "fps", 25.0 );
55 mlt_properties_set_int( properties
, "width", 720 );
56 mlt_properties_set_int( properties
, "height", 576 );
57 mlt_properties_set_int( properties
, "progressive", 0 );
58 mlt_properties_set_double( properties
, "aspect_ratio", 59.0 / 54.0 );
62 mlt_properties_set( properties
, "normalisation", "NTSC" );
63 mlt_properties_set_double( properties
, "fps", 30000.0 / 1001.0 );
64 mlt_properties_set_int( properties
, "width", 720 );
65 mlt_properties_set_int( properties
, "height", 480 );
66 mlt_properties_set_int( properties
, "progressive", 0 );
67 mlt_properties_set_double( properties
, "aspect_ratio", 10.0 / 11.0 );
70 // Default rescaler for all consumers
71 mlt_properties_set( properties
, "rescale", "bilinear" );
73 // Default read ahead buffer size
74 mlt_properties_set_int( properties
, "buffer", 25 );
76 // Default audio frequency and channels
77 mlt_properties_set_int( properties
, "frequency", 48000 );
78 mlt_properties_set_int( properties
, "channels", 2 );
80 // Default of all consumers is real time
81 mlt_properties_set_int( properties
, "real_time", 1 );
83 // Default to environment test card
84 mlt_properties_set( properties
, "test_card", mlt_environment( "MLT_TEST_CARD" ) );
86 // Hmm - default all consumers to yuv422 :-/
87 this->format
= mlt_image_yuv422
;
89 mlt_events_register( properties
, "consumer-frame-show", ( mlt_transmitter
)mlt_consumer_frame_show
);
90 mlt_events_register( properties
, "consumer-stopped", NULL
);
92 // Create the push mutex and condition
93 pthread_mutex_init( &this->put_mutex
, NULL
);
94 pthread_cond_init( &this->put_cond
, NULL
);
100 static void mlt_consumer_frame_show( mlt_listener listener
, mlt_properties owner
, mlt_service
this, void **args
)
102 if ( listener
!= NULL
)
103 listener( owner
, this, ( mlt_frame
)args
[ 0 ] );
106 /** Create a new consumer.
109 mlt_consumer
mlt_consumer_new( )
111 // Create the memory for the structure
112 mlt_consumer
this = malloc( sizeof( struct mlt_consumer_s
) );
116 mlt_consumer_init( this, NULL
);
122 /** Get the parent service object.
125 mlt_service
mlt_consumer_service( mlt_consumer
this )
127 return this != NULL ?
&this->parent
: NULL
;
130 /** Get the consumer properties.
133 mlt_properties
mlt_consumer_properties( mlt_consumer
this )
135 return this != NULL ?
MLT_SERVICE_PROPERTIES( &this->parent
) : NULL
;
138 /** Connect the consumer to the producer.
141 int mlt_consumer_connect( mlt_consumer
this, mlt_service producer
)
143 return mlt_service_connect_producer( &this->parent
, producer
, 0 );
146 /** Start the consumer.
149 int mlt_consumer_start( mlt_consumer
this )
152 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
154 // Determine if there's a test card producer
155 char *test_card
= mlt_properties_get( properties
, "test_card" );
157 // Just to make sure nothing is hanging around...
158 mlt_frame_close( this->put
);
162 if ( test_card
!= NULL
)
164 if ( mlt_properties_get_data( properties
, "test_card_producer", NULL
) == NULL
)
166 // Create a test card producer
167 mlt_producer producer
= mlt_factory_producer( NULL
, test_card
);
169 // Do we have a producer
170 if ( producer
!= NULL
)
172 // Test card should loop I guess...
173 mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer
), "eof", "pause" );
174 mlt_producer_set_speed( producer
, 0 );
175 mlt_producer_set_in_and_out( producer
, 0, 0 );
177 // Set the test card on the consumer
178 mlt_properties_set_data( properties
, "test_card_producer", producer
, 0, ( mlt_destructor
)mlt_producer_close
, NULL
);
184 // Allow the hash table to speed things up
185 mlt_properties_set_data( properties
, "test_card_producer", NULL
, 0, NULL
, NULL
);
188 // Check and run an ante command
189 if ( mlt_properties_get( properties
, "ante" ) )
190 system( mlt_properties_get( properties
, "ante" ) );
192 // Set the real_time preference
193 this->real_time
= mlt_properties_get_int( properties
, "real_time" );
196 if ( this->start
!= NULL
)
197 return this->start( this );
202 /** An alternative method to feed frames into the consumer - only valid if
203 the consumer itself is not connected.
206 int mlt_consumer_put_frame( mlt_consumer
this, mlt_frame frame
)
210 // Get the service assoicated to the consumer
211 mlt_service service
= MLT_CONSUMER_SERVICE( this );
213 if ( mlt_service_producer( service
) == NULL
)
217 pthread_mutex_lock( &this->put_mutex
);
218 while ( !mlt_consumer_is_stopped( this ) && this->put
!= NULL
)
220 gettimeofday( &now
, NULL
);
221 tm
.tv_sec
= now
.tv_sec
+ 1;
222 tm
.tv_nsec
= now
.tv_usec
* 1000;
223 pthread_cond_timedwait( &this->put_cond
, &this->put_mutex
, &tm
);
225 if ( !mlt_consumer_is_stopped( this ) && this->put
== NULL
)
228 mlt_frame_close( frame
);
229 pthread_cond_broadcast( &this->put_cond
);
230 pthread_mutex_unlock( &this->put_mutex
);
234 mlt_frame_close( frame
);
240 /** Protected method for consumer to get frames from connected service
243 mlt_frame
mlt_consumer_get_frame( mlt_consumer
this )
246 mlt_frame frame
= NULL
;
248 // Get the service assoicated to the consumer
249 mlt_service service
= MLT_CONSUMER_SERVICE( this );
251 // Get the consumer properties
252 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
255 if ( mlt_service_producer( service
) == NULL
&& mlt_properties_get_int( properties
, "put_mode" ) )
259 pthread_mutex_lock( &this->put_mutex
);
260 while ( !mlt_consumer_is_stopped( this ) && this->put
== NULL
)
262 gettimeofday( &now
, NULL
);
263 tm
.tv_sec
= now
.tv_sec
+ 1;
264 tm
.tv_nsec
= now
.tv_usec
* 1000;
265 pthread_cond_timedwait( &this->put_cond
, &this->put_mutex
, &tm
);
269 pthread_cond_broadcast( &this->put_cond
);
270 pthread_mutex_unlock( &this->put_mutex
);
272 mlt_service_apply_filters( service
, frame
, 0 );
274 else if ( mlt_service_producer( service
) != NULL
)
276 mlt_service_get_frame( service
, &frame
, 0 );
281 // Get the frame properties
282 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES( frame
);
284 // Get the test card producer
285 mlt_producer test_card
= mlt_properties_get_data( properties
, "test_card_producer", NULL
);
287 // Attach the test frame producer to it.
288 if ( test_card
!= NULL
)
289 mlt_properties_set_data( frame_properties
, "test_card_producer", test_card
, 0, NULL
, NULL
);
291 // Attach the rescale property
292 mlt_properties_set( frame_properties
, "rescale.interp", mlt_properties_get( properties
, "rescale" ) );
294 // Aspect ratio and other jiggery pokery
295 mlt_properties_set_double( frame_properties
, "consumer_aspect_ratio", mlt_properties_get_double( properties
, "aspect_ratio" ) );
296 if ( mlt_properties_get_int( properties
, "progressive" ) || mlt_properties_get_int( properties
, "deinterlace" ) )
297 mlt_properties_set_int( frame_properties
, "consumer_deinterlace", 1 );
304 static inline long time_difference( struct timeval
*time1
)
306 struct timeval time2
;
307 time2
.tv_sec
= time1
->tv_sec
;
308 time2
.tv_usec
= time1
->tv_usec
;
309 gettimeofday( time1
, NULL
);
310 return time1
->tv_sec
* 1000000 + time1
->tv_usec
- time2
.tv_sec
* 1000000 - time2
.tv_usec
;
313 static void *consumer_read_ahead_thread( void *arg
)
315 // The argument is the consumer
316 mlt_consumer
this = arg
;
318 // Get the properties of the consumer
319 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
321 // Get the width and height
322 int width
= mlt_properties_get_int( properties
, "width" );
323 int height
= mlt_properties_get_int( properties
, "height" );
325 // See if video is turned off
326 int video_off
= mlt_properties_get_int( properties
, "video_off" );
328 // Get the audio settings
329 mlt_audio_format afmt
= mlt_audio_pcm
;
331 double fps
= mlt_properties_get_double( properties
, "fps" );
332 int channels
= mlt_properties_get_int( properties
, "channels" );
333 int frequency
= mlt_properties_get_int( properties
, "frequency" );
337 // See if audio is turned off
338 int audio_off
= mlt_properties_get_int( properties
, "audio_off" );
340 // Get the maximum size of the buffer
341 int buffer
= mlt_properties_get_int( properties
, "buffer" ) + 1;
343 // General frame variable
344 mlt_frame frame
= NULL
;
345 uint8_t *image
= NULL
;
350 // Average time for get_frame and get_image
353 int64_t time_wait
= 0;
354 int64_t time_frame
= 0;
355 int64_t time_process
= 0;
358 // Get the first frame
359 frame
= mlt_consumer_get_frame( this );
361 // Get the image of the first frame
363 mlt_frame_get_image( frame
, &image
, &this->format
, &width
, &height
, 0 );
367 samples
= mlt_sample_calculator( fps
, frequency
, counter
++ );
368 mlt_frame_get_audio( frame
, &pcm
, &afmt
, &frequency
, &channels
, &samples
);
371 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame
), "rendered", 1 );
373 // Get the starting time (can ignore the times above)
374 gettimeofday( &ante
, NULL
);
376 // Continue to read ahead
377 while ( this->ahead
)
379 // Put the current frame into the queue
380 pthread_mutex_lock( &this->mutex
);
381 while( this->ahead
&& mlt_deque_count( this->queue
) >= buffer
)
382 pthread_cond_wait( &this->cond
, &this->mutex
);
383 mlt_deque_push_back( this->queue
, frame
);
384 pthread_cond_broadcast( &this->cond
);
385 pthread_mutex_unlock( &this->mutex
);
387 time_wait
+= time_difference( &ante
);
389 // Get the next frame
390 frame
= mlt_consumer_get_frame( this );
391 time_frame
+= time_difference( &ante
);
393 // If there's no frame, we're probably stopped...
397 // Increment the count
400 // All non normal playback frames should be shown
401 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame
), "_speed" ) != 1 )
414 // Get the image, mark as rendered and time it
416 mlt_frame_get_image( frame
, &image
, &this->format
, &width
, &height
, 0 );
417 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame
), "rendered", 1 );
421 // Increment the number of sequentially skipped frames
425 // If we've reached an unacceptable level, reset everything
436 // Always process audio
439 samples
= mlt_sample_calculator( fps
, frequency
, counter
++ );
440 mlt_frame_get_audio( frame
, &pcm
, &afmt
, &frequency
, &channels
, &samples
);
443 // Increment the time take for this frame
444 time_process
+= time_difference( &ante
);
446 // Determine if the next frame should be skipped
447 if ( mlt_deque_count( this->queue
) <= 5 && ( ( time_wait
+ time_frame
+ time_process
) / count
) > 40000 )
451 // Remove the last frame
452 mlt_frame_close( frame
);
457 static void consumer_read_ahead_start( mlt_consumer
this )
459 pthread_attr_t thread_attributes
;
464 // Create the frame queue
465 this->queue
= mlt_deque_init( );
468 pthread_mutex_init( &this->mutex
, NULL
);
470 // Create the condition
471 pthread_cond_init( &this->cond
, NULL
);
473 // Inherit the scheduling priority
474 pthread_attr_init( &thread_attributes
);
475 pthread_attr_setinheritsched( &thread_attributes
, PTHREAD_INHERIT_SCHED
);
477 // Create the read ahead
478 pthread_create( &this->ahead_thread
, &thread_attributes
, consumer_read_ahead_thread
, this );
481 static void consumer_read_ahead_stop( mlt_consumer
this )
483 // Make sure we're running
486 // Inform thread to stop
489 // Broadcast to the condition in case it's waiting
490 pthread_mutex_lock( &this->mutex
);
491 pthread_cond_broadcast( &this->cond
);
492 pthread_mutex_unlock( &this->mutex
);
494 // Broadcast to the put condition in case it's waiting
495 pthread_mutex_lock( &this->put_mutex
);
496 pthread_cond_broadcast( &this->put_cond
);
497 pthread_mutex_unlock( &this->put_mutex
);
500 pthread_join( this->ahead_thread
, NULL
);
503 pthread_mutex_destroy( &this->mutex
);
505 // Destroy the condition
506 pthread_cond_destroy( &this->cond
);
509 while ( mlt_deque_count( this->queue
) )
510 mlt_frame_close( mlt_deque_pop_back( this->queue
) );
513 mlt_deque_close( this->queue
);
517 void mlt_consumer_purge( mlt_consumer
this )
521 pthread_mutex_lock( &this->mutex
);
522 while ( mlt_deque_count( this->queue
) )
523 mlt_frame_close( mlt_deque_pop_back( this->queue
) );
524 pthread_cond_broadcast( &this->cond
);
525 pthread_mutex_unlock( &this->mutex
);
529 mlt_frame
mlt_consumer_rt_frame( mlt_consumer
this )
532 mlt_frame frame
= NULL
;
534 // Get the properties
535 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
537 // Check if the user has requested real time or not
538 if ( this->real_time
)
542 // Is the read ahead running?
543 if ( this->ahead
== 0 )
545 int buffer
= mlt_properties_get_int( properties
, "buffer" );
546 int prefill
= mlt_properties_get_int( properties
, "prefill" );
547 consumer_read_ahead_start( this );
549 size
= prefill
> 0 && prefill
< buffer ? prefill
: buffer
;
552 // Get frame from queue
553 pthread_mutex_lock( &this->mutex
);
554 while( this->ahead
&& mlt_deque_count( this->queue
) < size
)
555 pthread_cond_wait( &this->cond
, &this->mutex
);
556 frame
= mlt_deque_pop_front( this->queue
);
557 pthread_cond_broadcast( &this->cond
);
558 pthread_mutex_unlock( &this->mutex
);
562 // Get the frame in non real time
563 frame
= mlt_consumer_get_frame( this );
565 // This isn't true, but from the consumers perspective it is
567 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame
), "rendered", 1 );
573 /** Callback for the implementation to indicate a stopped condition.
576 void mlt_consumer_stopped( mlt_consumer
this )
578 mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( this ), "running", 0 );
579 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-stopped", NULL
);
582 /** Stop the consumer.
585 int mlt_consumer_stop( mlt_consumer
this )
588 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
591 if ( this->stop
!= NULL
)
594 // Check if the user has requested real time or not and stop if necessary
595 if ( mlt_properties_get_int( properties
, "real_time" ) )
596 consumer_read_ahead_stop( this );
599 pthread_mutex_lock( &this->put_mutex
);
600 if ( this->put
!= NULL
)
602 mlt_frame_close( this->put
);
605 pthread_cond_broadcast( &this->put_cond
);
606 pthread_mutex_unlock( &this->put_mutex
);
608 // Kill the test card
609 mlt_properties_set_data( properties
, "test_card_producer", NULL
, 0, NULL
, NULL
);
611 // Check and run a post command
612 if ( mlt_properties_get( properties
, "post" ) )
613 system( mlt_properties_get( properties
, "post" ) );
618 /** Determine if the consumer is stopped.
621 int mlt_consumer_is_stopped( mlt_consumer
this )
623 // Check if the consumer is stopped
624 if ( this->is_stopped
!= NULL
)
625 return this->is_stopped( this );
630 /** Close the consumer.
633 void mlt_consumer_close( mlt_consumer
this )
635 if ( this != NULL
&& mlt_properties_dec_ref( MLT_CONSUMER_PROPERTIES( this ) ) <= 0 )
637 // Get the childs close function
638 void ( *consumer_close
)( ) = this->close
;
640 if ( consumer_close
)
643 mlt_consumer_stop( this );
646 consumer_close( this );
651 // Make sure it only gets called once
652 this->parent
.close
= NULL
;
654 // Destroy the push mutex and condition
655 pthread_cond_broadcast( &this->put_cond
);
656 pthread_mutex_destroy( &this->put_mutex
);
657 pthread_cond_destroy( &this->put_cond
);
659 mlt_service_close( &this->parent
);