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 library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, 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 "mlt_profile.h"
  27
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <sys/time.h>
  32
  33 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  34 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  35 static void mlt_consumer_property_changed( mlt_service owner, mlt_consumer this, char *name );
  36 static void apply_profile_properties( mlt_profile profile, mlt_properties properties );
  37
  38 static mlt_event g_event_listener = NULL;
  39
  40 /** Public final methods
  41 */
  42
  43 int mlt_consumer_init( mlt_consumer this, void *child )
  44 {
  45         int error = 0;
  46         memset( this, 0, sizeof( struct mlt_consumer_s ) );
  47         this->child = child;
  48         error = mlt_service_init( &this->parent, this );
  49         if ( error == 0 )
  50         {
  51                 // Get the properties from the service
  52                 mlt_properties properties = MLT_SERVICE_PROPERTIES( &this->parent );
  53
  54                 // Apply the profile to properties for legacy integration
  55                 apply_profile_properties( mlt_profile_get(), properties );
  56
  57                 // Default rescaler for all consumers
  58                 mlt_properties_set( properties, "rescale", "bilinear" );
  59
  60                 // Default read ahead buffer size
  61                 mlt_properties_set_int( properties, "buffer", 25 );
  62
  63                 // Default audio frequency and channels
  64                 mlt_properties_set_int( properties, "frequency", 48000 );
  65                 mlt_properties_set_int( properties, "channels", 2 );
  66
  67                 // Default of all consumers is real time
  68                 mlt_properties_set_int( properties, "real_time", 1 );
  69
  70                 // Default to environment test card
  71                 mlt_properties_set( properties, "test_card", mlt_environment( "MLT_TEST_CARD" ) );
  72
  73                 // Hmm - default all consumers to yuv422 :-/
  74                 this->format = mlt_image_yuv422;
  75
  76                 mlt_events_register( properties, "consumer-frame-show", ( mlt_transmitter )mlt_consumer_frame_show );
  77                 mlt_events_register( properties, "consumer-frame-render", ( mlt_transmitter )mlt_consumer_frame_render );
  78                 mlt_events_register( properties, "consumer-stopped", NULL );
  79
  80                 // Register a property-changed listener to handle the profile property -
  81                 // subsequent properties can override the profile
  82                 g_event_listener = mlt_events_listen( properties, this, "property-changed", ( mlt_listener )mlt_consumer_property_changed );
  83
  84                 // Create the push mutex and condition
  85                 pthread_mutex_init( &this->put_mutex, NULL );
  86                 pthread_cond_init( &this->put_cond, NULL );
  87
  88         }
  89         return error;
  90 }
  91
  92 static void apply_profile_properties( mlt_profile profile, mlt_properties properties )
  93 {
  94         mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
  95         mlt_properties_set_int( properties, "frame_rate_num", profile->frame_rate_num );
  96         mlt_properties_set_int( properties, "frame_rate_den", profile->frame_rate_den );
  97         mlt_properties_set_int( properties, "width", profile->width );
  98         mlt_properties_set_int( properties, "height", profile->height );
  99         mlt_properties_set_int( properties, "progressive", profile->progressive );
 100         mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile )  );
 101         mlt_properties_set_int( properties, "sample_aspect_num", profile->sample_aspect_num );
 102         mlt_properties_set_int( properties, "sample_aspect_den", profile->sample_aspect_den );
 103         mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile )  );
 104         mlt_properties_set_int( properties, "display_aspect_num", profile->display_aspect_num );
 105         mlt_properties_set_int( properties, "display_aspect_num", profile->display_aspect_num );
 106 }
 107
 108 static void mlt_consumer_property_changed( mlt_service owner, mlt_consumer this, char *name )
 109 {
 110         if ( !strcmp( name, "profile" ) )
 111         {
 112                 // Get the properies
 113                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 114
 115                 // Locate the profile
 116                 mlt_profile_select( mlt_properties_get( properties, "profile" ) );
 117
 118                 // Stop listening to this
 119                 mlt_event_block( g_event_listener );
 120
 121                 // Apply to properties
 122                 apply_profile_properties( mlt_profile_get(), properties );
 123         }
 124 }
 125
 126 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 127 {
 128         if ( listener != NULL )
 129                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 130 }
 131
 132 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 133 {
 134         if ( listener != NULL )
 135                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 136 }
 137
 138 /** Create a new consumer.
 139 */
 140
 141 mlt_consumer mlt_consumer_new( )
 142 {
 143         // Create the memory for the structure
 144         mlt_consumer this = malloc( sizeof( struct mlt_consumer_s ) );
 145
 146         // Initialise it
 147         if ( this != NULL )
 148                 mlt_consumer_init( this, NULL );
 149
 150         // Return it
 151         return this;
 152 }
 153
 154 /** Get the parent service object.
 155 */
 156
 157 mlt_service mlt_consumer_service( mlt_consumer this )
 158 {
 159         return this != NULL ? &this->parent : NULL;
 160 }
 161
 162 /** Get the consumer properties.
 163 */
 164
 165 mlt_properties mlt_consumer_properties( mlt_consumer this )
 166 {
 167         return this != NULL ? MLT_SERVICE_PROPERTIES( &this->parent ) : NULL;
 168 }
 169
 170 /** Connect the consumer to the producer.
 171 */
 172
 173 int mlt_consumer_connect( mlt_consumer this, mlt_service producer )
 174 {
 175         return mlt_service_connect_producer( &this->parent, producer, 0 );
 176 }
 177
 178 /** Start the consumer.
 179 */
 180
 181 int mlt_consumer_start( mlt_consumer this )
 182 {
 183         // Get the properies
 184         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 185
 186         // Determine if there's a test card producer
 187         char *test_card = mlt_properties_get( properties, "test_card" );
 188
 189         // Just to make sure nothing is hanging around...
 190         mlt_frame_close( this->put );
 191         this->put = NULL;
 192         this->put_active = 1;
 193
 194         // Deal with it now.
 195         if ( test_card != NULL )
 196         {
 197                 if ( mlt_properties_get_data( properties, "test_card_producer", NULL ) == NULL )
 198                 {
 199                         // Create a test card producer
 200                         mlt_producer producer = mlt_factory_producer( NULL, test_card );
 201
 202                         // Do we have a producer
 203                         if ( producer != NULL )
 204                         {
 205                                 // Test card should loop I guess...
 206                                 mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
 207                                 //mlt_producer_set_speed( producer, 0 );
 208                                 //mlt_producer_set_in_and_out( producer, 0, 0 );
 209
 210                                 // Set the test card on the consumer
 211                                 mlt_properties_set_data( properties, "test_card_producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
 212                         }
 213                 }
 214         }
 215         else
 216         {
 217                 // Allow the hash table to speed things up
 218                 mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 219         }
 220
 221         // Check and run an ante command
 222         if ( mlt_properties_get( properties, "ante" ) )
 223                 system( mlt_properties_get( properties, "ante" ) );
 224
 225         // Set the real_time preference
 226         this->real_time = mlt_properties_get_int( properties, "real_time" );
 227
 228         // Start the service
 229         if ( this->start != NULL )
 230                 return this->start( this );
 231
 232         return 0;
 233 }
 234
 235 /** An alternative method to feed frames into the consumer - only valid if
 236         the consumer itself is not connected.
 237 */
 238
 239 int mlt_consumer_put_frame( mlt_consumer this, mlt_frame frame )
 240 {
 241         int error = 1;
 242
 243         // Get the service assoicated to the consumer
 244         mlt_service service = MLT_CONSUMER_SERVICE( this );
 245
 246         if ( mlt_service_producer( service ) == NULL )
 247         {
 248                 struct timeval now;
 249                 struct timespec tm;
 250                 pthread_mutex_lock( &this->put_mutex );
 251                 while ( this->put_active && this->put != NULL )
 252                 {
 253                         gettimeofday( &now, NULL );
 254                         tm.tv_sec = now.tv_sec + 1;
 255                         tm.tv_nsec = now.tv_usec * 1000;
 256                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 257                 }
 258                 if ( this->put_active && this->put == NULL )
 259                         this->put = frame;
 260                 else
 261                         mlt_frame_close( frame );
 262                 pthread_cond_broadcast( &this->put_cond );
 263                 pthread_mutex_unlock( &this->put_mutex );
 264         }
 265         else
 266         {
 267                 mlt_frame_close( frame );
 268         }
 269
 270         return error;
 271 }
 272
 273 /** Protected method for consumer to get frames from connected service
 274 */
 275
 276 mlt_frame mlt_consumer_get_frame( mlt_consumer this )
 277 {
 278         // Frame to return
 279         mlt_frame frame = NULL;
 280
 281         // Get the service assoicated to the consumer
 282         mlt_service service = MLT_CONSUMER_SERVICE( this );
 283
 284         // Get the consumer properties
 285         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 286
 287         // Get the frame
 288         if ( mlt_service_producer( service ) == NULL && mlt_properties_get_int( properties, "put_mode" ) )
 289         {
 290                 struct timeval now;
 291                 struct timespec tm;
 292                 pthread_mutex_lock( &this->put_mutex );
 293                 while ( this->put_active && this->put == NULL )
 294                 {
 295                         gettimeofday( &now, NULL );
 296                         tm.tv_sec = now.tv_sec + 1;
 297                         tm.tv_nsec = now.tv_usec * 1000;
 298                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 299                 }
 300                 frame = this->put;
 301                 this->put = NULL;
 302                 pthread_cond_broadcast( &this->put_cond );
 303                 pthread_mutex_unlock( &this->put_mutex );
 304                 if ( frame != NULL )
 305                         mlt_service_apply_filters( service, frame, 0 );
 306         }
 307         else if ( mlt_service_producer( service ) != NULL )
 308         {
 309                 mlt_service_get_frame( service, &frame, 0 );
 310         }
 311         else
 312         {
 313                 frame = mlt_frame_init( );
 314         }
 315
 316         if ( frame != NULL )
 317         {
 318                 // Get the frame properties
 319                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
 320
 321                 // Get the test card producer
 322                 mlt_producer test_card = mlt_properties_get_data( properties, "test_card_producer", NULL );
 323
 324                 // Attach the test frame producer to it.
 325                 if ( test_card != NULL )
 326                         mlt_properties_set_data( frame_properties, "test_card_producer", test_card, 0, NULL, NULL );
 327
 328                 // Attach the rescale property
 329                 mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale" ) );
 330
 331                 // Aspect ratio and other jiggery pokery
 332                 mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
 333                 mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" ) );
 334                 mlt_properties_set( frame_properties, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
 335         }
 336
 337         // Return the frame
 338         return frame;
 339 }
 340
 341 static inline long time_difference( struct timeval *time1 )
 342 {
 343         struct timeval time2;
 344         time2.tv_sec = time1->tv_sec;
 345         time2.tv_usec = time1->tv_usec;
 346         gettimeofday( time1, NULL );
 347         return time1->tv_sec * 1000000 + time1->tv_usec - time2.tv_sec * 1000000 - time2.tv_usec;
 348 }
 349
 350 int mlt_consumer_profile( mlt_properties properties, char *profile )
 351 {
 352         mlt_profile p = mlt_profile_select( profile );
 353         if ( p )
 354         {
 355                 apply_profile_properties( p, properties );
 356                 return 1;
 357         }
 358         else
 359         {
 360                 return 0;
 361         }
 362 }
 363
 364 static void *consumer_read_ahead_thread( void *arg )
 365 {
 366         // The argument is the consumer
 367         mlt_consumer this = arg;
 368
 369         // Get the properties of the consumer
 370         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 371
 372         // Get the width and height
 373         int width = mlt_properties_get_int( properties, "width" );
 374         int height = mlt_properties_get_int( properties, "height" );
 375
 376         // See if video is turned off
 377         int video_off = mlt_properties_get_int( properties, "video_off" );
 378         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 379         int preview_format = mlt_properties_get_int( properties, "preview_format" );
 380
 381         // Get the audio settings
 382         mlt_audio_format afmt = mlt_audio_pcm;
 383         int counter = 0;
 384         double fps = mlt_properties_get_double( properties, "fps" );
 385         int channels = mlt_properties_get_int( properties, "channels" );
 386         int frequency = mlt_properties_get_int( properties, "frequency" );
 387         int samples = 0;
 388         int16_t *pcm = NULL;
 389
 390         // See if audio is turned off
 391         int audio_off = mlt_properties_get_int( properties, "audio_off" );
 392
 393         // Get the maximum size of the buffer
 394         int buffer = mlt_properties_get_int( properties, "buffer" ) + 1;
 395
 396         // General frame variable
 397         mlt_frame frame = NULL;
 398         uint8_t *image = NULL;
 399
 400         // Time structures
 401         struct timeval ante;
 402
 403         // Average time for get_frame and get_image
 404         int count = 1;
 405         int skipped = 0;
 406         int64_t time_wait = 0;
 407         int64_t time_frame = 0;
 408         int64_t time_process = 0;
 409         int skip_next = 0;
 410         mlt_service lock_object = NULL;
 411
 412         if ( preview_off && preview_format != 0 )
 413                 this->format = preview_format;
 414
 415         // Get the first frame
 416         frame = mlt_consumer_get_frame( this );
 417
 418         // Get the lock object
 419         lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 420
 421         // Lock it
 422         if ( lock_object ) mlt_service_lock( lock_object );
 423
 424         // Get the image of the first frame
 425         if ( !video_off )
 426         {
 427                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 428                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 429         }
 430
 431         if ( !audio_off )
 432         {
 433                 samples = mlt_sample_calculator( fps, frequency, counter++ );
 434                 mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 435         }
 436
 437         // Unlock the lock object
 438         if ( lock_object ) mlt_service_unlock( lock_object );
 439
 440         // Mark as rendered
 441         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 442
 443         // Get the starting time (can ignore the times above)
 444         gettimeofday( &ante, NULL );
 445
 446         // Continue to read ahead
 447         while ( this->ahead )
 448         {
 449                 // Fetch width/height again
 450                 width = mlt_properties_get_int( properties, "width" );
 451                 height = mlt_properties_get_int( properties, "height" );
 452
 453                 // Put the current frame into the queue
 454                 pthread_mutex_lock( &this->mutex );
 455                 while( this->ahead && mlt_deque_count( this->queue ) >= buffer )
 456                         pthread_cond_wait( &this->cond, &this->mutex );
 457                 mlt_deque_push_back( this->queue, frame );
 458                 pthread_cond_broadcast( &this->cond );
 459                 pthread_mutex_unlock( &this->mutex );
 460
 461                 time_wait += time_difference( &ante );
 462
 463                 // Get the next frame
 464                 frame = mlt_consumer_get_frame( this );
 465                 time_frame += time_difference( &ante );
 466
 467                 // If there's no frame, we're probably stopped...
 468                 if ( frame == NULL )
 469                         continue;
 470
 471                 // Attempt to fetch the lock object
 472                 lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 473
 474                 // Increment the count
 475                 count ++;
 476
 477                 // Lock if there's a lock object
 478                 if ( lock_object ) mlt_service_lock( lock_object );
 479
 480                 // All non normal playback frames should be shown
 481                 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "_speed" ) != 1 )
 482                 {
 483                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "consumer_deinterlace", 1 );
 484                         skipped = 0;
 485                         time_frame = 0;
 486                         time_process = 0;
 487                         time_wait = 0;
 488                         count = 1;
 489                         skip_next = 0;
 490                 }
 491
 492                 // Get the image
 493                 if ( !skip_next )
 494                 {
 495                         // Get the image, mark as rendered and time it
 496                         if ( !video_off )
 497                         {
 498                                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 499                                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 500                         }
 501                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 502                 }
 503                 else
 504                 {
 505                         // Increment the number of sequentially skipped frames
 506                         skipped ++;
 507                         skip_next = 0;
 508
 509                         // If we've reached an unacceptable level, reset everything
 510                         if ( skipped > 5 )
 511                         {
 512                                 skipped = 0;
 513                                 time_frame = 0;
 514                                 time_process = 0;
 515                                 time_wait = 0;
 516                                 count = 1;
 517                         }
 518                 }
 519
 520                 // Always process audio
 521                 if ( !audio_off )
 522                 {
 523                         samples = mlt_sample_calculator( fps, frequency, counter++ );
 524                         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 525                 }
 526
 527                 // Increment the time take for this frame
 528                 time_process += time_difference( &ante );
 529
 530                 // Determine if the next frame should be skipped
 531                 if ( mlt_deque_count( this->queue ) <= 5 && ( ( time_wait + time_frame + time_process ) / count ) > 40000 )
 532                         skip_next = 1;
 533
 534                 // Unlock if there's a lock object
 535                 if ( lock_object ) mlt_service_unlock( lock_object );
 536         }
 537
 538         // Remove the last frame
 539         mlt_frame_close( frame );
 540
 541         return NULL;
 542 }
 543
 544 static void consumer_read_ahead_start( mlt_consumer this )
 545 {
 546         // We're running now
 547         this->ahead = 1;
 548
 549         // Create the frame queue
 550         this->queue = mlt_deque_init( );
 551
 552         // Create the mutex
 553         pthread_mutex_init( &this->mutex, NULL );
 554
 555         // Create the condition
 556         pthread_cond_init( &this->cond, NULL );
 557
 558         // Create the read ahead
 559         pthread_create( &this->ahead_thread, NULL, consumer_read_ahead_thread, this );
 560 }
 561
 562 static void consumer_read_ahead_stop( mlt_consumer this )
 563 {
 564         // Make sure we're running
 565         if ( this->ahead )
 566         {
 567                 // Inform thread to stop
 568                 this->ahead = 0;
 569
 570                 // Broadcast to the condition in case it's waiting
 571                 pthread_mutex_lock( &this->mutex );
 572                 pthread_cond_broadcast( &this->cond );
 573                 pthread_mutex_unlock( &this->mutex );
 574
 575                 // Broadcast to the put condition in case it's waiting
 576                 pthread_mutex_lock( &this->put_mutex );
 577                 pthread_cond_broadcast( &this->put_cond );
 578                 pthread_mutex_unlock( &this->put_mutex );
 579
 580                 // Join the thread
 581                 pthread_join( this->ahead_thread, NULL );
 582
 583                 // Destroy the mutex
 584                 pthread_mutex_destroy( &this->mutex );
 585
 586                 // Destroy the condition
 587                 pthread_cond_destroy( &this->cond );
 588
 589                 // Wipe the queue
 590                 while ( mlt_deque_count( this->queue ) )
 591                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 592
 593                 // Close the queue
 594                 mlt_deque_close( this->queue );
 595         }
 596 }
 597
 598 void mlt_consumer_purge( mlt_consumer this )
 599 {
 600         if ( this->ahead )
 601         {
 602                 pthread_mutex_lock( &this->mutex );
 603                 while ( mlt_deque_count( this->queue ) )
 604                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 605                 pthread_cond_broadcast( &this->cond );
 606                 pthread_mutex_unlock( &this->mutex );
 607         }
 608 }
 609
 610 mlt_frame mlt_consumer_rt_frame( mlt_consumer this )
 611 {
 612         // Frame to return
 613         mlt_frame frame = NULL;
 614
 615         // Get the properties
 616         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 617
 618         // Check if the user has requested real time or not
 619         if ( this->real_time )
 620         {
 621                 int size = 1;
 622
 623                 // Is the read ahead running?
 624                 if ( this->ahead == 0 )
 625                 {
 626                         int buffer = mlt_properties_get_int( properties, "buffer" );
 627                         int prefill = mlt_properties_get_int( properties, "prefill" );
 628                         consumer_read_ahead_start( this );
 629                         if ( buffer > 1 )
 630                                 size = prefill > 0 && prefill < buffer ? prefill : buffer;
 631                 }
 632
 633                 // Get frame from queue
 634                 pthread_mutex_lock( &this->mutex );
 635                 while( this->ahead && mlt_deque_count( this->queue ) < size )
 636                         pthread_cond_wait( &this->cond, &this->mutex );
 637                 frame = mlt_deque_pop_front( this->queue );
 638                 pthread_cond_broadcast( &this->cond );
 639                 pthread_mutex_unlock( &this->mutex );
 640         }
 641         else
 642         {
 643                 // Get the frame in non real time
 644                 frame = mlt_consumer_get_frame( this );
 645
 646                 // This isn't true, but from the consumers perspective it is
 647                 if ( frame != NULL )
 648                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 649         }
 650
 651         return frame;
 652 }
 653
 654 /** Callback for the implementation to indicate a stopped condition.
 655 */
 656
 657 void mlt_consumer_stopped( mlt_consumer this )
 658 {
 659         mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( this ), "running", 0 );
 660         mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-stopped", NULL );
 661 }
 662
 663 /** Stop the consumer.
 664 */
 665
 666 int mlt_consumer_stop( mlt_consumer this )
 667 {
 668         // Get the properies
 669         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 670         char *debug = mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "debug" );
 671
 672         // Just in case...
 673         if ( debug ) fprintf( stderr, "%s: stopping put waiting\n", debug );
 674         pthread_mutex_lock( &this->put_mutex );
 675         this->put_active = 0;
 676         pthread_cond_broadcast( &this->put_cond );
 677         pthread_mutex_unlock( &this->put_mutex );
 678
 679         // Stop the consumer
 680         if ( debug ) fprintf( stderr, "%s: stopping consumer\n", debug );
 681         if ( this->stop != NULL )
 682                 this->stop( this );
 683
 684         // Check if the user has requested real time or not and stop if necessary
 685         if ( debug ) fprintf( stderr, "%s: stopping read_ahead\n", debug );
 686         if ( mlt_properties_get_int( properties, "real_time" ) )
 687                 consumer_read_ahead_stop( this );
 688
 689         // Kill the test card
 690         mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 691
 692         // Check and run a post command
 693         if ( mlt_properties_get( properties, "post" ) )
 694                 system( mlt_properties_get( properties, "post" ) );
 695
 696         if ( debug ) fprintf( stderr, "%s: stopped\n", debug );
 697
 698         return 0;
 699 }
 700
 701 /** Determine if the consumer is stopped.
 702 */
 703
 704 int mlt_consumer_is_stopped( mlt_consumer this )
 705 {
 706         // Check if the consumer is stopped
 707         if ( this->is_stopped != NULL )
 708                 return this->is_stopped( this );
 709
 710         return 0;
 711 }
 712
 713 /** Close the consumer.
 714 */
 715
 716 void mlt_consumer_close( mlt_consumer this )
 717 {
 718         if ( this != NULL && mlt_properties_dec_ref( MLT_CONSUMER_PROPERTIES( this ) ) <= 0 )
 719         {
 720                 // Get the childs close function
 721                 void ( *consumer_close )( ) = this->close;
 722
 723                 if ( consumer_close )
 724                 {
 725                         // Just in case...
 726                         //mlt_consumer_stop( this );
 727
 728                         this->close = NULL;
 729                         consumer_close( this );
 730                 }
 731                 else
 732                 {
 733                         // Make sure it only gets called once
 734                         this->parent.close = NULL;
 735
 736                         // Destroy the push mutex and condition
 737                         pthread_mutex_destroy( &this->put_mutex );
 738                         pthread_cond_destroy( &this->put_cond );
 739
 740                         mlt_service_close( &this->parent );
 741                 }
 742         }
 743 }