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