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_close( g_event_listener );
 120                 g_event_listener = NULL;
 121
 122                 // Apply to properties
 123                 apply_profile_properties( mlt_profile_get(), properties );
 124         }
 125 }
 126
 127 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 128 {
 129         if ( listener != NULL )
 130                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 131 }
 132
 133 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 134 {
 135         if ( listener != NULL )
 136                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 137 }
 138
 139 /** Create a new consumer.
 140 */
 141
 142 mlt_consumer mlt_consumer_new( )
 143 {
 144         // Create the memory for the structure
 145         mlt_consumer this = malloc( sizeof( struct mlt_consumer_s ) );
 146
 147         // Initialise it
 148         if ( this != NULL )
 149                 mlt_consumer_init( this, NULL );
 150
 151         // Return it
 152         return this;
 153 }
 154
 155 /** Get the parent service object.
 156 */
 157
 158 mlt_service mlt_consumer_service( mlt_consumer this )
 159 {
 160         return this != NULL ? &this->parent : NULL;
 161 }
 162
 163 /** Get the consumer properties.
 164 */
 165
 166 mlt_properties mlt_consumer_properties( mlt_consumer this )
 167 {
 168         return this != NULL ? MLT_SERVICE_PROPERTIES( &this->parent ) : NULL;
 169 }
 170
 171 /** Connect the consumer to the producer.
 172 */
 173
 174 int mlt_consumer_connect( mlt_consumer this, mlt_service producer )
 175 {
 176         return mlt_service_connect_producer( &this->parent, producer, 0 );
 177 }
 178
 179 /** Start the consumer.
 180 */
 181
 182 int mlt_consumer_start( mlt_consumer this )
 183 {
 184         // Get the properies
 185         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 186
 187         // Determine if there's a test card producer
 188         char *test_card = mlt_properties_get( properties, "test_card" );
 189
 190         // Just to make sure nothing is hanging around...
 191         mlt_frame_close( this->put );
 192         this->put = NULL;
 193         this->put_active = 1;
 194
 195         // Deal with it now.
 196         if ( test_card != NULL )
 197         {
 198                 if ( mlt_properties_get_data( properties, "test_card_producer", NULL ) == NULL )
 199                 {
 200                         // Create a test card producer
 201                         mlt_producer producer = mlt_factory_producer( NULL, test_card );
 202
 203                         // Do we have a producer
 204                         if ( producer != NULL )
 205                         {
 206                                 // Test card should loop I guess...
 207                                 mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
 208                                 //mlt_producer_set_speed( producer, 0 );
 209                                 //mlt_producer_set_in_and_out( producer, 0, 0 );
 210
 211                                 // Set the test card on the consumer
 212                                 mlt_properties_set_data( properties, "test_card_producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
 213                         }
 214                 }
 215         }
 216         else
 217         {
 218                 // Allow the hash table to speed things up
 219                 mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 220         }
 221
 222         // Check and run an ante command
 223         if ( mlt_properties_get( properties, "ante" ) )
 224                 system( mlt_properties_get( properties, "ante" ) );
 225
 226         // Set the real_time preference
 227         this->real_time = mlt_properties_get_int( properties, "real_time" );
 228
 229         // Start the service
 230         if ( this->start != NULL )
 231                 return this->start( this );
 232
 233         return 0;
 234 }
 235
 236 /** An alternative method to feed frames into the consumer - only valid if
 237         the consumer itself is not connected.
 238 */
 239
 240 int mlt_consumer_put_frame( mlt_consumer this, mlt_frame frame )
 241 {
 242         int error = 1;
 243
 244         // Get the service assoicated to the consumer
 245         mlt_service service = MLT_CONSUMER_SERVICE( this );
 246
 247         if ( mlt_service_producer( service ) == NULL )
 248         {
 249                 struct timeval now;
 250                 struct timespec tm;
 251                 pthread_mutex_lock( &this->put_mutex );
 252                 while ( this->put_active && this->put != NULL )
 253                 {
 254                         gettimeofday( &now, NULL );
 255                         tm.tv_sec = now.tv_sec + 1;
 256                         tm.tv_nsec = now.tv_usec * 1000;
 257                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 258                 }
 259                 if ( this->put_active && this->put == NULL )
 260                         this->put = frame;
 261                 else
 262                         mlt_frame_close( frame );
 263                 pthread_cond_broadcast( &this->put_cond );
 264                 pthread_mutex_unlock( &this->put_mutex );
 265         }
 266         else
 267         {
 268                 mlt_frame_close( frame );
 269         }
 270
 271         return error;
 272 }
 273
 274 /** Protected method for consumer to get frames from connected service
 275 */
 276
 277 mlt_frame mlt_consumer_get_frame( mlt_consumer this )
 278 {
 279         // Frame to return
 280         mlt_frame frame = NULL;
 281
 282         // Get the service assoicated to the consumer
 283         mlt_service service = MLT_CONSUMER_SERVICE( this );
 284
 285         // Get the consumer properties
 286         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 287
 288         // Get the frame
 289         if ( mlt_service_producer( service ) == NULL && mlt_properties_get_int( properties, "put_mode" ) )
 290         {
 291                 struct timeval now;
 292                 struct timespec tm;
 293                 pthread_mutex_lock( &this->put_mutex );
 294                 while ( this->put_active && this->put == NULL )
 295                 {
 296                         gettimeofday( &now, NULL );
 297                         tm.tv_sec = now.tv_sec + 1;
 298                         tm.tv_nsec = now.tv_usec * 1000;
 299                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 300                 }
 301                 frame = this->put;
 302                 this->put = NULL;
 303                 pthread_cond_broadcast( &this->put_cond );
 304                 pthread_mutex_unlock( &this->put_mutex );
 305                 if ( frame != NULL )
 306                         mlt_service_apply_filters( service, frame, 0 );
 307         }
 308         else if ( mlt_service_producer( service ) != NULL )
 309         {
 310                 mlt_service_get_frame( service, &frame, 0 );
 311         }
 312         else
 313         {
 314                 frame = mlt_frame_init( );
 315         }
 316
 317         if ( frame != NULL )
 318         {
 319                 // Get the frame properties
 320                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
 321
 322                 // Get the test card producer
 323                 mlt_producer test_card = mlt_properties_get_data( properties, "test_card_producer", NULL );
 324
 325                 // Attach the test frame producer to it.
 326                 if ( test_card != NULL )
 327                         mlt_properties_set_data( frame_properties, "test_card_producer", test_card, 0, NULL, NULL );
 328
 329                 // Attach the rescale property
 330                 mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale" ) );
 331
 332                 // Aspect ratio and other jiggery pokery
 333                 mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
 334                 mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" ) );
 335                 mlt_properties_set( frame_properties, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
 336         }
 337
 338         // Return the frame
 339         return frame;
 340 }
 341
 342 static inline long time_difference( struct timeval *time1 )
 343 {
 344         struct timeval time2;
 345         time2.tv_sec = time1->tv_sec;
 346         time2.tv_usec = time1->tv_usec;
 347         gettimeofday( time1, NULL );
 348         return time1->tv_sec * 1000000 + time1->tv_usec - time2.tv_sec * 1000000 - time2.tv_usec;
 349 }
 350
 351 int mlt_consumer_profile( mlt_properties properties, char *profile )
 352 {
 353         mlt_profile p = mlt_profile_select( profile );
 354         if ( p )
 355         {
 356                 apply_profile_properties( p, properties );
 357                 return 1;
 358         }
 359         else
 360         {
 361                 return 0;
 362         }
 363 }
 364
 365 static void *consumer_read_ahead_thread( void *arg )
 366 {
 367         // The argument is the consumer
 368         mlt_consumer this = arg;
 369
 370         // Get the properties of the consumer
 371         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 372
 373         // Get the width and height
 374         int width = mlt_properties_get_int( properties, "width" );
 375         int height = mlt_properties_get_int( properties, "height" );
 376
 377         // See if video is turned off
 378         int video_off = mlt_properties_get_int( properties, "video_off" );
 379         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 380         int preview_format = mlt_properties_get_int( properties, "preview_format" );
 381
 382         // Get the audio settings
 383         mlt_audio_format afmt = mlt_audio_pcm;
 384         int counter = 0;
 385         double fps = mlt_properties_get_double( properties, "fps" );
 386         int channels = mlt_properties_get_int( properties, "channels" );
 387         int frequency = mlt_properties_get_int( properties, "frequency" );
 388         int samples = 0;
 389         int16_t *pcm = NULL;
 390
 391         // See if audio is turned off
 392         int audio_off = mlt_properties_get_int( properties, "audio_off" );
 393
 394         // Get the maximum size of the buffer
 395         int buffer = mlt_properties_get_int( properties, "buffer" ) + 1;
 396
 397         // General frame variable
 398         mlt_frame frame = NULL;
 399         uint8_t *image = NULL;
 400
 401         // Time structures
 402         struct timeval ante;
 403
 404         // Average time for get_frame and get_image
 405         int count = 1;
 406         int skipped = 0;
 407         int64_t time_wait = 0;
 408         int64_t time_frame = 0;
 409         int64_t time_process = 0;
 410         int skip_next = 0;
 411         mlt_service lock_object = NULL;
 412
 413         if ( preview_off && preview_format != 0 )
 414                 this->format = preview_format;
 415
 416         // Get the first frame
 417         frame = mlt_consumer_get_frame( this );
 418
 419         // Get the lock object
 420         lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 421
 422         // Lock it
 423         if ( lock_object ) mlt_service_lock( lock_object );
 424
 425         // Get the image of the first frame
 426         if ( !video_off )
 427         {
 428                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 429                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 430         }
 431
 432         if ( !audio_off )
 433         {
 434                 samples = mlt_sample_calculator( fps, frequency, counter++ );
 435                 mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 436         }
 437
 438         // Unlock the lock object
 439         if ( lock_object ) mlt_service_unlock( lock_object );
 440
 441         // Mark as rendered
 442         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 443
 444         // Get the starting time (can ignore the times above)
 445         gettimeofday( &ante, NULL );
 446
 447         // Continue to read ahead
 448         while ( this->ahead )
 449         {
 450                 // Fetch width/height again
 451                 width = mlt_properties_get_int( properties, "width" );
 452                 height = mlt_properties_get_int( properties, "height" );
 453
 454                 // Put the current frame into the queue
 455                 pthread_mutex_lock( &this->mutex );
 456                 while( this->ahead && mlt_deque_count( this->queue ) >= buffer )
 457                         pthread_cond_wait( &this->cond, &this->mutex );
 458                 mlt_deque_push_back( this->queue, frame );
 459                 pthread_cond_broadcast( &this->cond );
 460                 pthread_mutex_unlock( &this->mutex );
 461
 462                 time_wait += time_difference( &ante );
 463
 464                 // Get the next frame
 465                 frame = mlt_consumer_get_frame( this );
 466                 time_frame += time_difference( &ante );
 467
 468                 // If there's no frame, we're probably stopped...
 469                 if ( frame == NULL )
 470                         continue;
 471
 472                 // Attempt to fetch the lock object
 473                 lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 474
 475                 // Increment the count
 476                 count ++;
 477
 478                 // Lock if there's a lock object
 479                 if ( lock_object ) mlt_service_lock( lock_object );
 480
 481                 // All non normal playback frames should be shown
 482                 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "_speed" ) != 1 )
 483                 {
 484                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "consumer_deinterlace", 1 );
 485                         skipped = 0;
 486                         time_frame = 0;
 487                         time_process = 0;
 488                         time_wait = 0;
 489                         count = 1;
 490                         skip_next = 0;
 491                 }
 492
 493                 // Get the image
 494                 if ( !skip_next )
 495                 {
 496                         // Get the image, mark as rendered and time it
 497                         if ( !video_off )
 498                         {
 499                                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 500                                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 501                         }
 502                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 503                 }
 504                 else
 505                 {
 506                         // Increment the number of sequentially skipped frames
 507                         skipped ++;
 508                         skip_next = 0;
 509
 510                         // If we've reached an unacceptable level, reset everything
 511                         if ( skipped > 5 )
 512                         {
 513                                 skipped = 0;
 514                                 time_frame = 0;
 515                                 time_process = 0;
 516                                 time_wait = 0;
 517                                 count = 1;
 518                         }
 519                 }
 520
 521                 // Always process audio
 522                 if ( !audio_off )
 523                 {
 524                         samples = mlt_sample_calculator( fps, frequency, counter++ );
 525                         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 526                 }
 527
 528                 // Increment the time take for this frame
 529                 time_process += time_difference( &ante );
 530
 531                 // Determine if the next frame should be skipped
 532                 if ( mlt_deque_count( this->queue ) <= 5 && ( ( time_wait + time_frame + time_process ) / count ) > 40000 )
 533                         skip_next = 1;
 534
 535                 // Unlock if there's a lock object
 536                 if ( lock_object ) mlt_service_unlock( lock_object );
 537         }
 538
 539         // Remove the last frame
 540         mlt_frame_close( frame );
 541
 542         return NULL;
 543 }
 544
 545 static void consumer_read_ahead_start( mlt_consumer this )
 546 {
 547         // We're running now
 548         this->ahead = 1;
 549
 550         // Create the frame queue
 551         this->queue = mlt_deque_init( );
 552
 553         // Create the mutex
 554         pthread_mutex_init( &this->mutex, NULL );
 555
 556         // Create the condition
 557         pthread_cond_init( &this->cond, NULL );
 558
 559         // Create the read ahead
 560         pthread_create( &this->ahead_thread, NULL, consumer_read_ahead_thread, this );
 561 }
 562
 563 static void consumer_read_ahead_stop( mlt_consumer this )
 564 {
 565         // Make sure we're running
 566         if ( this->ahead )
 567         {
 568                 // Inform thread to stop
 569                 this->ahead = 0;
 570
 571                 // Broadcast to the condition in case it's waiting
 572                 pthread_mutex_lock( &this->mutex );
 573                 pthread_cond_broadcast( &this->cond );
 574                 pthread_mutex_unlock( &this->mutex );
 575
 576                 // Broadcast to the put condition in case it's waiting
 577                 pthread_mutex_lock( &this->put_mutex );
 578                 pthread_cond_broadcast( &this->put_cond );
 579                 pthread_mutex_unlock( &this->put_mutex );
 580
 581                 // Join the thread
 582                 pthread_join( this->ahead_thread, NULL );
 583
 584                 // Destroy the mutex
 585                 pthread_mutex_destroy( &this->mutex );
 586
 587                 // Destroy the condition
 588                 pthread_cond_destroy( &this->cond );
 589
 590                 // Wipe the queue
 591                 while ( mlt_deque_count( this->queue ) )
 592                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 593
 594                 // Close the queue
 595                 mlt_deque_close( this->queue );
 596         }
 597 }
 598
 599 void mlt_consumer_purge( mlt_consumer this )
 600 {
 601         if ( this->ahead )
 602         {
 603                 pthread_mutex_lock( &this->mutex );
 604                 while ( mlt_deque_count( this->queue ) )
 605                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 606                 pthread_cond_broadcast( &this->cond );
 607                 pthread_mutex_unlock( &this->mutex );
 608         }
 609 }
 610
 611 mlt_frame mlt_consumer_rt_frame( mlt_consumer this )
 612 {
 613         // Frame to return
 614         mlt_frame frame = NULL;
 615
 616         // Get the properties
 617         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 618
 619         // Check if the user has requested real time or not
 620         if ( this->real_time )
 621         {
 622                 int size = 1;
 623
 624                 // Is the read ahead running?
 625                 if ( this->ahead == 0 )
 626                 {
 627                         int buffer = mlt_properties_get_int( properties, "buffer" );
 628                         int prefill = mlt_properties_get_int( properties, "prefill" );
 629                         consumer_read_ahead_start( this );
 630                         if ( buffer > 1 )
 631                                 size = prefill > 0 && prefill < buffer ? prefill : buffer;
 632                 }
 633
 634                 // Get frame from queue
 635                 pthread_mutex_lock( &this->mutex );
 636                 while( this->ahead && mlt_deque_count( this->queue ) < size )
 637                         pthread_cond_wait( &this->cond, &this->mutex );
 638                 frame = mlt_deque_pop_front( this->queue );
 639                 pthread_cond_broadcast( &this->cond );
 640                 pthread_mutex_unlock( &this->mutex );
 641         }
 642         else
 643         {
 644                 // Get the frame in non real time
 645                 frame = mlt_consumer_get_frame( this );
 646
 647                 // This isn't true, but from the consumers perspective it is
 648                 if ( frame != NULL )
 649                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 650         }
 651
 652         return frame;
 653 }
 654
 655 /** Callback for the implementation to indicate a stopped condition.
 656 */
 657
 658 void mlt_consumer_stopped( mlt_consumer this )
 659 {
 660         mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( this ), "running", 0 );
 661         mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-stopped", NULL );
 662 }
 663
 664 /** Stop the consumer.
 665 */
 666
 667 int mlt_consumer_stop( mlt_consumer this )
 668 {
 669         // Get the properies
 670         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 671         char *debug = mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "debug" );
 672
 673         // Just in case...
 674         if ( debug ) fprintf( stderr, "%s: stopping put waiting\n", debug );
 675         pthread_mutex_lock( &this->put_mutex );
 676         this->put_active = 0;
 677         pthread_cond_broadcast( &this->put_cond );
 678         pthread_mutex_unlock( &this->put_mutex );
 679
 680         // Stop the consumer
 681         if ( debug ) fprintf( stderr, "%s: stopping consumer\n", debug );
 682         if ( this->stop != NULL )
 683                 this->stop( this );
 684
 685         // Check if the user has requested real time or not and stop if necessary
 686         if ( debug ) fprintf( stderr, "%s: stopping read_ahead\n", debug );
 687         if ( mlt_properties_get_int( properties, "real_time" ) )
 688                 consumer_read_ahead_stop( this );
 689
 690         // Kill the test card
 691         mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 692
 693         // Check and run a post command
 694         if ( mlt_properties_get( properties, "post" ) )
 695                 system( mlt_properties_get( properties, "post" ) );
 696
 697         if ( debug ) fprintf( stderr, "%s: stopped\n", debug );
 698
 699         return 0;
 700 }
 701
 702 /** Determine if the consumer is stopped.
 703 */
 704
 705 int mlt_consumer_is_stopped( mlt_consumer this )
 706 {
 707         // Check if the consumer is stopped
 708         if ( this->is_stopped != NULL )
 709                 return this->is_stopped( this );
 710
 711         return 0;
 712 }
 713
 714 /** Close the consumer.
 715 */
 716
 717 void mlt_consumer_close( mlt_consumer this )
 718 {
 719         if ( this != NULL && mlt_properties_dec_ref( MLT_CONSUMER_PROPERTIES( this ) ) <= 0 )
 720         {
 721                 // Get the childs close function
 722                 void ( *consumer_close )( ) = this->close;
 723
 724                 if ( consumer_close )
 725                 {
 726                         // Just in case...
 727                         //mlt_consumer_stop( this );
 728
 729                         this->close = NULL;
 730                         consumer_close( this );
 731                 }
 732                 else
 733                 {
 734                         // Make sure it only gets called once
 735                         this->parent.close = NULL;
 736
 737                         // Destroy the push mutex and condition
 738                         pthread_mutex_destroy( &this->put_mutex );
 739                         pthread_cond_destroy( &this->put_cond );
 740
 741                         mlt_service_close( &this->parent );
 742                 }
 743         }
 744 }