git.sesse.net Git - mlt/blob - src/framework/mlt_consumer.c

   1 /*
   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>
   5  *
   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.
  10  *
  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.
  15  *
  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.
  19  */
  20
  21 #include "config.h"
  22 #include "mlt_consumer.h"
  23 #include "mlt_factory.h"
  24 #include "mlt_producer.h"
  25 #include "mlt_frame.h"
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include <sys/time.h>
  30
  31 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  32 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  33
  34 /** Public final methods
  35 */
  36
  37 int mlt_consumer_init( mlt_consumer this, void *child )
  38 {
  39         int error = 0;
  40         memset( this, 0, sizeof( struct mlt_consumer_s ) );
  41         this->child = child;
  42         error = mlt_service_init( &this->parent, this );
  43         if ( error == 0 )
  44         {
  45                 // Get the properties from the service
  46                 mlt_properties properties = MLT_SERVICE_PROPERTIES( &this->parent );
  47
  48                 // Get the normalisation preference
  49                 char *normalisation = mlt_environment( "MLT_NORMALISATION" );
  50
  51                 // Deal with normalisation
  52                 if ( normalisation == NULL || strcmp( normalisation, "NTSC" ) )
  53                 {
  54                         mlt_properties_set( properties, "normalisation", "PAL" );
  55                         mlt_properties_set_double( properties, "fps", 25.0 );
  56                         mlt_properties_set_int( properties, "width", 720 );
  57                         mlt_properties_set_int( properties, "height", 576 );
  58                         mlt_properties_set_int( properties, "progressive", 0 );
  59                         mlt_properties_set_double( properties, "aspect_ratio", 59.0 / 54.0 );
  60                 }
  61                 else
  62                 {
  63                         mlt_properties_set( properties, "normalisation", "NTSC" );
  64                         mlt_properties_set_double( properties, "fps", 30000.0 / 1001.0 );
  65                         mlt_properties_set_int( properties, "width", 720 );
  66                         mlt_properties_set_int( properties, "height", 480 );
  67                         mlt_properties_set_int( properties, "progressive", 0 );
  68                         mlt_properties_set_double( properties, "aspect_ratio", 10.0 / 11.0 );
  69                 }
  70
  71                 // Default rescaler for all consumers
  72                 mlt_properties_set( properties, "rescale", "bilinear" );
  73
  74                 // Default read ahead buffer size
  75                 mlt_properties_set_int( properties, "buffer", 25 );
  76
  77                 // Default audio frequency and channels
  78                 mlt_properties_set_int( properties, "frequency", 48000 );
  79                 mlt_properties_set_int( properties, "channels", 2 );
  80
  81                 // Default of all consumers is real time
  82                 mlt_properties_set_int( properties, "real_time", 1 );
  83
  84                 // Default to environment test card
  85                 mlt_properties_set( properties, "test_card", mlt_environment( "MLT_TEST_CARD" ) );
  86
  87                 // Hmm - default all consumers to yuv422 :-/
  88                 this->format = mlt_image_yuv422;
  89
  90                 mlt_events_register( properties, "consumer-frame-show", ( mlt_transmitter )mlt_consumer_frame_show );
  91                 mlt_events_register( properties, "consumer-frame-render", ( mlt_transmitter )mlt_consumer_frame_render );
  92                 mlt_events_register( properties, "consumer-stopped", NULL );
  93
  94                 // Create the push mutex and condition
  95                 pthread_mutex_init( &this->put_mutex, NULL );
  96                 pthread_cond_init( &this->put_cond, NULL );
  97
  98         }
  99         return error;
 100 }
 101
 102 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 103 {
 104         if ( listener != NULL )
 105                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 106 }
 107
 108 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 109 {
 110         if ( listener != NULL )
 111                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 112 }
 113
 114 /** Create a new consumer.
 115 */
 116
 117 mlt_consumer mlt_consumer_new( )
 118 {
 119         // Create the memory for the structure
 120         mlt_consumer this = malloc( sizeof( struct mlt_consumer_s ) );
 121
 122         // Initialise it
 123         if ( this != NULL )
 124                 mlt_consumer_init( this, NULL );
 125
 126         // Return it
 127         return this;
 128 }
 129
 130 /** Get the parent service object.
 131 */
 132
 133 mlt_service mlt_consumer_service( mlt_consumer this )
 134 {
 135         return this != NULL ? &this->parent : NULL;
 136 }
 137
 138 /** Get the consumer properties.
 139 */
 140
 141 mlt_properties mlt_consumer_properties( mlt_consumer this )
 142 {
 143         return this != NULL ? MLT_SERVICE_PROPERTIES( &this->parent ) : NULL;
 144 }
 145
 146 /** Connect the consumer to the producer.
 147 */
 148
 149 int mlt_consumer_connect( mlt_consumer this, mlt_service producer )
 150 {
 151         return mlt_service_connect_producer( &this->parent, producer, 0 );
 152 }
 153
 154 /** Start the consumer.
 155 */
 156
 157 int mlt_consumer_start( mlt_consumer this )
 158 {
 159         // Get the properies
 160         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 161
 162         // Determine if there's a test card producer
 163         char *test_card = mlt_properties_get( properties, "test_card" );
 164
 165         // Just to make sure nothing is hanging around...
 166         mlt_frame_close( this->put );
 167         this->put = NULL;
 168         this->put_active = 1;
 169
 170         // Deal with it now.
 171         if ( test_card != NULL )
 172         {
 173                 if ( mlt_properties_get_data( properties, "test_card_producer", NULL ) == NULL )
 174                 {
 175                         // Create a test card producer
 176                         mlt_producer producer = mlt_factory_producer( NULL, test_card );
 177
 178                         // Do we have a producer
 179                         if ( producer != NULL )
 180                         {
 181                                 // Test card should loop I guess...
 182                                 mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
 183                                 //mlt_producer_set_speed( producer, 0 );
 184                                 //mlt_producer_set_in_and_out( producer, 0, 0 );
 185
 186                                 // Set the test card on the consumer
 187                                 mlt_properties_set_data( properties, "test_card_producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
 188                         }
 189                 }
 190         }
 191         else
 192         {
 193                 // Allow the hash table to speed things up
 194                 mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 195         }
 196
 197         // Check and run an ante command
 198         if ( mlt_properties_get( properties, "ante" ) )
 199                 system( mlt_properties_get( properties, "ante" ) );
 200
 201         // Set the real_time preference
 202         this->real_time = mlt_properties_get_int( properties, "real_time" );
 203
 204         // Start the service
 205         if ( this->start != NULL )
 206                 return this->start( this );
 207
 208         return 0;
 209 }
 210
 211 /** An alternative method to feed frames into the consumer - only valid if
 212         the consumer itself is not connected.
 213 */
 214
 215 int mlt_consumer_put_frame( mlt_consumer this, mlt_frame frame )
 216 {
 217         int error = 1;
 218
 219         // Get the service assoicated to the consumer
 220         mlt_service service = MLT_CONSUMER_SERVICE( this );
 221
 222         if ( mlt_service_producer( service ) == NULL )
 223         {
 224                 struct timeval now;
 225                 struct timespec tm;
 226                 pthread_mutex_lock( &this->put_mutex );
 227                 while ( this->put_active && this->put != NULL )
 228                 {
 229                         gettimeofday( &now, NULL );
 230                         tm.tv_sec = now.tv_sec + 1;
 231                         tm.tv_nsec = now.tv_usec * 1000;
 232                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 233                 }
 234                 if ( this->put_active && this->put == NULL )
 235                         this->put = frame;
 236                 else
 237                         mlt_frame_close( frame );
 238                 pthread_cond_broadcast( &this->put_cond );
 239                 pthread_mutex_unlock( &this->put_mutex );
 240         }
 241         else
 242         {
 243                 mlt_frame_close( frame );
 244         }
 245
 246         return error;
 247 }
 248
 249 /** Protected method for consumer to get frames from connected service
 250 */
 251
 252 mlt_frame mlt_consumer_get_frame( mlt_consumer this )
 253 {
 254         // Frame to return
 255         mlt_frame frame = NULL;
 256
 257         // Get the service assoicated to the consumer
 258         mlt_service service = MLT_CONSUMER_SERVICE( this );
 259
 260         // Get the consumer properties
 261         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 262
 263         // Get the frame
 264         if ( mlt_service_producer( service ) == NULL && mlt_properties_get_int( properties, "put_mode" ) )
 265         {
 266                 struct timeval now;
 267                 struct timespec tm;
 268                 pthread_mutex_lock( &this->put_mutex );
 269                 while ( this->put_active && this->put == NULL )
 270                 {
 271                         gettimeofday( &now, NULL );
 272                         tm.tv_sec = now.tv_sec + 1;
 273                         tm.tv_nsec = now.tv_usec * 1000;
 274                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 275                 }
 276                 frame = this->put;
 277                 this->put = NULL;
 278                 pthread_cond_broadcast( &this->put_cond );
 279                 pthread_mutex_unlock( &this->put_mutex );
 280                 if ( frame != NULL )
 281                         mlt_service_apply_filters( service, frame, 0 );
 282         }
 283         else if ( mlt_service_producer( service ) != NULL )
 284         {
 285                 mlt_service_get_frame( service, &frame, 0 );
 286         }
 287         else
 288         {
 289                 frame = mlt_frame_init( );
 290         }
 291
 292         if ( frame != NULL )
 293         {
 294                 // Get the frame properties
 295                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
 296
 297                 // Get the test card producer
 298                 mlt_producer test_card = mlt_properties_get_data( properties, "test_card_producer", NULL );
 299
 300                 // Attach the test frame producer to it.
 301                 if ( test_card != NULL )
 302                         mlt_properties_set_data( frame_properties, "test_card_producer", test_card, 0, NULL, NULL );
 303
 304                 // Attach the rescale property
 305                 mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale" ) );
 306
 307                 // Aspect ratio and other jiggery pokery
 308                 mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
 309                 mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" ) );
 310         }
 311
 312         // Return the frame
 313         return frame;
 314 }
 315
 316 static inline long time_difference( struct timeval *time1 )
 317 {
 318         struct timeval time2;
 319         time2.tv_sec = time1->tv_sec;
 320         time2.tv_usec = time1->tv_usec;
 321         gettimeofday( time1, NULL );
 322         return time1->tv_sec * 1000000 + time1->tv_usec - time2.tv_sec * 1000000 - time2.tv_usec;
 323 }
 324
 325 static void *consumer_read_ahead_thread( void *arg )
 326 {
 327         // The argument is the consumer
 328         mlt_consumer this = arg;
 329
 330         // Get the properties of the consumer
 331         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 332
 333         // Get the width and height
 334         int width = mlt_properties_get_int( properties, "width" );
 335         int height = mlt_properties_get_int( properties, "height" );
 336
 337         // See if video is turned off
 338         int video_off = mlt_properties_get_int( properties, "video_off" );
 339
 340         // Get the audio settings
 341         mlt_audio_format afmt = mlt_audio_pcm;
 342         int counter = 0;
 343         double fps = mlt_properties_get_double( properties, "fps" );
 344         int channels = mlt_properties_get_int( properties, "channels" );
 345         int frequency = mlt_properties_get_int( properties, "frequency" );
 346         int samples = 0;
 347         int16_t *pcm = NULL;
 348
 349         // See if audio is turned off
 350         int audio_off = mlt_properties_get_int( properties, "audio_off" );
 351
 352         // Get the maximum size of the buffer
 353         int buffer = mlt_properties_get_int( properties, "buffer" ) + 1;
 354
 355         // General frame variable
 356         mlt_frame frame = NULL;
 357         uint8_t *image = NULL;
 358
 359         // Time structures
 360         struct timeval ante;
 361
 362         // Average time for get_frame and get_image
 363         int count = 1;
 364         int skipped = 0;
 365         int64_t time_wait = 0;
 366         int64_t time_frame = 0;
 367         int64_t time_process = 0;
 368         int skip_next = 0;
 369         mlt_service lock_object = NULL;
 370
 371         // Get the first frame
 372         frame = mlt_consumer_get_frame( this );
 373
 374         // Get the lock object
 375         lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 376
 377         // Lock it
 378         if ( lock_object ) mlt_service_lock( lock_object );
 379
 380         // Get the image of the first frame
 381         if ( !video_off )
 382         {
 383                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 384                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 385         }
 386
 387         if ( !audio_off )
 388         {
 389                 samples = mlt_sample_calculator( fps, frequency, counter++ );
 390                 mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 391         }
 392
 393         // Unlock the lock object
 394         if ( lock_object ) mlt_service_unlock( lock_object );
 395
 396         // Mark as rendered
 397         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 398
 399         // Get the starting time (can ignore the times above)
 400         gettimeofday( &ante, NULL );
 401
 402         // Continue to read ahead
 403         while ( this->ahead )
 404         {
 405                 // Put the current frame into the queue
 406                 pthread_mutex_lock( &this->mutex );
 407                 while( this->ahead && mlt_deque_count( this->queue ) >= buffer )
 408                         pthread_cond_wait( &this->cond, &this->mutex );
 409                 mlt_deque_push_back( this->queue, frame );
 410                 pthread_cond_broadcast( &this->cond );
 411                 pthread_mutex_unlock( &this->mutex );
 412
 413                 time_wait += time_difference( &ante );
 414
 415                 // Get the next frame
 416                 frame = mlt_consumer_get_frame( this );
 417                 time_frame += time_difference( &ante );
 418
 419                 // If there's no frame, we're probably stopped...
 420                 if ( frame == NULL )
 421                         continue;
 422
 423                 // Attempt to fetch the lock object
 424                 lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 425
 426                 // Increment the count
 427                 count ++;
 428
 429                 // Lock if there's a lock object
 430                 if ( lock_object ) mlt_service_lock( lock_object );
 431
 432                 // All non normal playback frames should be shown
 433                 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "_speed" ) != 1 )
 434                 {
 435                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "consumer_deinterlace", 1 );
 436                         skipped = 0;
 437                         time_frame = 0;
 438                         time_process = 0;
 439                         time_wait = 0;
 440                         count = 1;
 441                         skip_next = 0;
 442                 }
 443
 444                 // Get the image
 445                 if ( !skip_next )
 446                 {
 447                         // Get the image, mark as rendered and time it
 448                         if ( !video_off )
 449                         {
 450                                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 451                                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 452                         }
 453                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 454                 }
 455                 else
 456                 {
 457                         // Increment the number of sequentially skipped frames
 458                         skipped ++;
 459                         skip_next = 0;
 460
 461                         // If we've reached an unacceptable level, reset everything
 462                         if ( skipped > 5 )
 463                         {
 464                                 skipped = 0;
 465                                 time_frame = 0;
 466                                 time_process = 0;
 467                                 time_wait = 0;
 468                                 count = 1;
 469                         }
 470                 }
 471
 472                 // Always process audio
 473                 if ( !audio_off )
 474                 {
 475                         samples = mlt_sample_calculator( fps, frequency, counter++ );
 476                         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 477                 }
 478
 479                 // Increment the time take for this frame
 480                 time_process += time_difference( &ante );
 481
 482                 // Determine if the next frame should be skipped
 483                 if ( mlt_deque_count( this->queue ) <= 5 && ( ( time_wait + time_frame + time_process ) / count ) > 40000 )
 484                         skip_next = 1;
 485
 486                 // Unlock if there's a lock object
 487                 if ( lock_object ) mlt_service_unlock( lock_object );
 488         }
 489
 490         // Remove the last frame
 491         mlt_frame_close( frame );
 492
 493         return NULL;
 494 }
 495
 496 static void consumer_read_ahead_start( mlt_consumer this )
 497 {
 498         // We're running now
 499         this->ahead = 1;
 500
 501         // Create the frame queue
 502         this->queue = mlt_deque_init( );
 503
 504         // Create the mutex
 505         pthread_mutex_init( &this->mutex, NULL );
 506
 507         // Create the condition
 508         pthread_cond_init( &this->cond, NULL );
 509
 510         // Create the read ahead
 511         pthread_create( &this->ahead_thread, NULL, consumer_read_ahead_thread, this );
 512 }
 513
 514 static void consumer_read_ahead_stop( mlt_consumer this )
 515 {
 516         // Make sure we're running
 517         if ( this->ahead )
 518         {
 519                 // Inform thread to stop
 520                 this->ahead = 0;
 521
 522                 // Broadcast to the condition in case it's waiting
 523                 pthread_mutex_lock( &this->mutex );
 524                 pthread_cond_broadcast( &this->cond );
 525                 pthread_mutex_unlock( &this->mutex );
 526
 527                 // Broadcast to the put condition in case it's waiting
 528                 pthread_mutex_lock( &this->put_mutex );
 529                 pthread_cond_broadcast( &this->put_cond );
 530                 pthread_mutex_unlock( &this->put_mutex );
 531
 532                 // Join the thread
 533                 pthread_join( this->ahead_thread, NULL );
 534
 535                 // Destroy the mutex
 536                 pthread_mutex_destroy( &this->mutex );
 537
 538                 // Destroy the condition
 539                 pthread_cond_destroy( &this->cond );
 540
 541                 // Wipe the queue
 542                 while ( mlt_deque_count( this->queue ) )
 543                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 544
 545                 // Close the queue
 546                 mlt_deque_close( this->queue );
 547         }
 548 }
 549
 550 void mlt_consumer_purge( mlt_consumer this )
 551 {
 552         if ( this->ahead )
 553         {
 554                 pthread_mutex_lock( &this->mutex );
 555                 while ( mlt_deque_count( this->queue ) )
 556                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 557                 pthread_cond_broadcast( &this->cond );
 558                 pthread_mutex_unlock( &this->mutex );
 559         }
 560 }
 561
 562 mlt_frame mlt_consumer_rt_frame( mlt_consumer this )
 563 {
 564         // Frame to return
 565         mlt_frame frame = NULL;
 566
 567         // Get the properties
 568         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 569
 570         // Check if the user has requested real time or not
 571         if ( this->real_time )
 572         {
 573                 int size = 1;
 574
 575                 // Is the read ahead running?
 576                 if ( this->ahead == 0 )
 577                 {
 578                         int buffer = mlt_properties_get_int( properties, "buffer" );
 579                         int prefill = mlt_properties_get_int( properties, "prefill" );
 580                         consumer_read_ahead_start( this );
 581                         if ( buffer > 1 )
 582                                 size = prefill > 0 && prefill < buffer ? prefill : buffer;
 583                 }
 584
 585                 // Get frame from queue
 586                 pthread_mutex_lock( &this->mutex );
 587                 while( this->ahead && mlt_deque_count( this->queue ) < size )
 588                         pthread_cond_wait( &this->cond, &this->mutex );
 589                 frame = mlt_deque_pop_front( this->queue );
 590                 pthread_cond_broadcast( &this->cond );
 591                 pthread_mutex_unlock( &this->mutex );
 592         }
 593         else
 594         {
 595                 // Get the frame in non real time
 596                 frame = mlt_consumer_get_frame( this );
 597
 598                 // This isn't true, but from the consumers perspective it is
 599                 if ( frame != NULL )
 600                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 601         }
 602
 603         return frame;
 604 }
 605
 606 /** Callback for the implementation to indicate a stopped condition.
 607 */
 608
 609 void mlt_consumer_stopped( mlt_consumer this )
 610 {
 611         mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( this ), "running", 0 );
 612         mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-stopped", NULL );
 613 }
 614
 615 /** Stop the consumer.
 616 */
 617
 618 int mlt_consumer_stop( mlt_consumer this )
 619 {
 620         // Get the properies
 621         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 622         char *debug = mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "debug" );
 623
 624         // Just in case...
 625         if ( debug ) fprintf( stderr, "%s: stopping put waiting\n", debug );
 626         pthread_mutex_lock( &this->put_mutex );
 627         this->put_active = 0;
 628         pthread_cond_broadcast( &this->put_cond );
 629         pthread_mutex_unlock( &this->put_mutex );
 630
 631         // Stop the consumer
 632         if ( debug ) fprintf( stderr, "%s: stopping consumer\n", debug );
 633         if ( this->stop != NULL )
 634                 this->stop( this );
 635
 636         // Check if the user has requested real time or not and stop if necessary
 637         if ( debug ) fprintf( stderr, "%s: stopping read_ahead\n", debug );
 638         if ( mlt_properties_get_int( properties, "real_time" ) )
 639                 consumer_read_ahead_stop( this );
 640
 641         // Kill the test card
 642         mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 643
 644         // Check and run a post command
 645         if ( mlt_properties_get( properties, "post" ) )
 646                 system( mlt_properties_get( properties, "post" ) );
 647
 648         if ( debug ) fprintf( stderr, "%s: stopped\n", debug );
 649
 650         return 0;
 651 }
 652
 653 /** Determine if the consumer is stopped.
 654 */
 655
 656 int mlt_consumer_is_stopped( mlt_consumer this )
 657 {
 658         // Check if the consumer is stopped
 659         if ( this->is_stopped != NULL )
 660                 return this->is_stopped( this );
 661
 662         return 0;
 663 }
 664
 665 /** Close the consumer.
 666 */
 667
 668 void mlt_consumer_close( mlt_consumer this )
 669 {
 670         if ( this != NULL && mlt_properties_dec_ref( MLT_CONSUMER_PROPERTIES( this ) ) <= 0 )
 671         {
 672                 // Get the childs close function
 673                 void ( *consumer_close )( ) = this->close;
 674
 675                 if ( consumer_close )
 676                 {
 677                         // Just in case...
 678                         //mlt_consumer_stop( this );
 679
 680                         this->close = NULL;
 681                         consumer_close( this );
 682                 }
 683                 else
 684                 {
 685                         // Make sure it only gets called once
 686                         this->parent.close = NULL;
 687
 688                         // Destroy the push mutex and condition
 689                         pthread_mutex_destroy( &this->put_mutex );
 690                         pthread_cond_destroy( &this->put_cond );
 691
 692                         mlt_service_close( &this->parent );
 693                 }
 694         }
 695 }