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 "mlt_consumer.h"
  22 #include "mlt_factory.h"
  23 #include "mlt_producer.h"
  24 #include "mlt_frame.h"
  25 #include "mlt_profile.h"
  26
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <sys/time.h>
  31
  32 #undef DEINTERLACE_ON_NOT_NORMAL_SPEED
  33
  34 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  35 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  36 static void mlt_consumer_property_changed( mlt_service owner, mlt_consumer this, char *name );
  37 static void apply_profile_properties( mlt_consumer this, mlt_profile profile, mlt_properties properties );
  38
  39 /** Public final methods
  40 */
  41
  42 int mlt_consumer_init( mlt_consumer this, void *child, mlt_profile profile )
  43 {
  44         int error = 0;
  45         memset( this, 0, sizeof( struct mlt_consumer_s ) );
  46         this->child = child;
  47         error = mlt_service_init( &this->parent, this );
  48         if ( error == 0 )
  49         {
  50                 // Get the properties from the service
  51                 mlt_properties properties = MLT_SERVICE_PROPERTIES( &this->parent );
  52
  53                 // Apply profile to properties
  54                 if ( profile == NULL )
  55                 {
  56                         // Normally the application creates the profile and controls its lifetime
  57                         // This is the fallback exception handling
  58                         profile = mlt_profile_init( NULL );
  59                         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
  60                         mlt_properties_set_data( properties, "_profile", profile, 0, (mlt_destructor)mlt_profile_close, NULL );
  61                 }
  62                 apply_profile_properties( this, profile, properties );
  63
  64                 // Default rescaler for all consumers
  65                 mlt_properties_set( properties, "rescale", "bilinear" );
  66
  67                 // Default read ahead buffer size
  68                 mlt_properties_set_int( properties, "buffer", 25 );
  69
  70                 // Default audio frequency and channels
  71                 mlt_properties_set_int( properties, "frequency", 48000 );
  72                 mlt_properties_set_int( properties, "channels", 2 );
  73
  74                 // Default of all consumers is real time
  75                 mlt_properties_set_int( properties, "real_time", 1 );
  76
  77                 // Default to environment test card
  78                 mlt_properties_set( properties, "test_card", mlt_environment( "MLT_TEST_CARD" ) );
  79
  80                 // Hmm - default all consumers to yuv422 :-/
  81                 this->format = mlt_image_yuv422;
  82
  83                 mlt_events_register( properties, "consumer-frame-show", ( mlt_transmitter )mlt_consumer_frame_show );
  84                 mlt_events_register( properties, "consumer-frame-render", ( mlt_transmitter )mlt_consumer_frame_render );
  85                 mlt_events_register( properties, "consumer-stopped", NULL );
  86
  87                 // Register a property-changed listener to handle the profile property -
  88                 // subsequent properties can override the profile
  89                 this->event_listener = mlt_events_listen( properties, this, "property-changed", ( mlt_listener )mlt_consumer_property_changed );
  90
  91                 // Create the push mutex and condition
  92                 pthread_mutex_init( &this->put_mutex, NULL );
  93                 pthread_cond_init( &this->put_cond, NULL );
  94
  95         }
  96         return error;
  97 }
  98
  99 static void apply_profile_properties( mlt_consumer this, mlt_profile profile, mlt_properties properties )
 100 {
 101         mlt_event_block( this->event_listener );
 102         mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
 103         mlt_properties_set_int( properties, "frame_rate_num", profile->frame_rate_num );
 104         mlt_properties_set_int( properties, "frame_rate_den", profile->frame_rate_den );
 105         mlt_properties_set_int( properties, "width", profile->width );
 106         mlt_properties_set_int( properties, "height", profile->height );
 107         mlt_properties_set_int( properties, "progressive", profile->progressive );
 108         mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile )  );
 109         mlt_properties_set_int( properties, "sample_aspect_num", profile->sample_aspect_num );
 110         mlt_properties_set_int( properties, "sample_aspect_den", profile->sample_aspect_den );
 111         mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile )  );
 112         mlt_properties_set_int( properties, "display_aspect_num", profile->display_aspect_num );
 113         mlt_properties_set_int( properties, "display_aspect_num", profile->display_aspect_num );
 114         mlt_event_unblock( this->event_listener );
 115 }
 116
 117 static void mlt_consumer_property_changed( mlt_service owner, mlt_consumer this, char *name )
 118 {
 119         if ( !strcmp( name, "profile" ) )
 120         {
 121                 // Get the properies
 122                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 123
 124                 // Get the current profile
 125                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 126
 127                 // Load the new profile
 128                 mlt_profile new_profile = mlt_profile_init( mlt_properties_get( properties, name ) );
 129
 130                 if ( new_profile )
 131                 {
 132                         // Copy the profile
 133                         if ( profile != NULL )
 134                         {
 135                                 free( profile->description );
 136                                 memcpy( profile, new_profile, sizeof( struct mlt_profile_s ) );
 137                                 profile->description = strdup( new_profile->description );
 138                                 mlt_profile_close( new_profile );
 139                         }
 140                         else
 141                         {
 142                                 profile = new_profile;
 143                         }
 144
 145                         // Apply to properties
 146                         apply_profile_properties( this, profile, properties );
 147                 }
 148         }
 149         else if ( !strcmp( name, "frame_rate_num" ) )
 150         {
 151                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 152                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 153                 if ( profile )
 154                 {
 155                         profile->frame_rate_num = mlt_properties_get_int( properties, "frame_rate_num" );
 156                         mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
 157                 }
 158         }
 159         else if ( !strcmp( name, "frame_rate_den" ) )
 160         {
 161                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 162                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 163                 if ( profile )
 164                 {
 165                         profile->frame_rate_den = mlt_properties_get_int( properties, "frame_rate_den" );
 166                         mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
 167                 }
 168         }
 169         else if ( !strcmp( name, "width" ) )
 170         {
 171                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 172                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 173                 if ( profile )
 174                         profile->width = mlt_properties_get_int( properties, "width" );
 175         }
 176         else if ( !strcmp( name, "height" ) )
 177         {
 178                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 179                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 180                 if ( profile )
 181                         profile->height = mlt_properties_get_int( properties, "height" );
 182         }
 183         else if ( !strcmp( name, "progressive" ) )
 184         {
 185                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 186                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 187                 if ( profile )
 188                         profile->progressive = mlt_properties_get_int( properties, "progressive" );
 189         }
 190         else if ( !strcmp( name, "sample_aspect_num" ) )
 191         {
 192                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 193                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 194                 profile->sample_aspect_num = mlt_properties_get_int( properties, "sample_aspect_num" );
 195                 if ( profile )
 196                         mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile )  );
 197         }
 198         else if ( !strcmp( name, "sample_aspect_den" ) )
 199         {
 200                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 201                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 202                 profile->sample_aspect_den = mlt_properties_get_int( properties, "sample_aspect_den" );
 203                 if ( profile )
 204                         mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile )  );
 205         }
 206         else if ( !strcmp( name, "display_aspect_num" ) )
 207         {
 208                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 209                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 210                 if ( profile )
 211                 {
 212                         profile->display_aspect_num = mlt_properties_get_int( properties, "display_aspect_num" );
 213                         mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile )  );
 214                 }
 215         }
 216         else if ( !strcmp( name, "display_aspect_den" ) )
 217         {
 218                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 219                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 220                 if ( profile )
 221                 {
 222                         profile->display_aspect_den = mlt_properties_get_int( properties, "display_aspect_den" );
 223                         mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile )  );
 224                 }
 225         }
 226 }
 227
 228 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 229 {
 230         if ( listener != NULL )
 231                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 232 }
 233
 234 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 235 {
 236         if ( listener != NULL )
 237                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 238 }
 239
 240 /** Create a new consumer.
 241 */
 242
 243 mlt_consumer mlt_consumer_new( mlt_profile profile )
 244 {
 245         // Create the memory for the structure
 246         mlt_consumer this = malloc( sizeof( struct mlt_consumer_s ) );
 247
 248         // Initialise it
 249         if ( this != NULL )
 250                 mlt_consumer_init( this, NULL, profile );
 251
 252         // Return it
 253         return this;
 254 }
 255
 256 /** Get the parent service object.
 257 */
 258
 259 mlt_service mlt_consumer_service( mlt_consumer this )
 260 {
 261         return this != NULL ? &this->parent : NULL;
 262 }
 263
 264 /** Get the consumer properties.
 265 */
 266
 267 mlt_properties mlt_consumer_properties( mlt_consumer this )
 268 {
 269         return this != NULL ? MLT_SERVICE_PROPERTIES( &this->parent ) : NULL;
 270 }
 271
 272 /** Connect the consumer to the producer.
 273 */
 274
 275 int mlt_consumer_connect( mlt_consumer this, mlt_service producer )
 276 {
 277         return mlt_service_connect_producer( &this->parent, producer, 0 );
 278 }
 279
 280 /** Start the consumer.
 281 */
 282
 283 int mlt_consumer_start( mlt_consumer this )
 284 {
 285         // Stop listening to the property-changed event
 286         mlt_event_block( this->event_listener );
 287
 288         // Get the properies
 289         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 290
 291         // Determine if there's a test card producer
 292         char *test_card = mlt_properties_get( properties, "test_card" );
 293
 294         // Just to make sure nothing is hanging around...
 295         mlt_frame_close( this->put );
 296         this->put = NULL;
 297         this->put_active = 1;
 298
 299         // Deal with it now.
 300         if ( test_card != NULL )
 301         {
 302                 if ( mlt_properties_get_data( properties, "test_card_producer", NULL ) == NULL )
 303                 {
 304                         // Create a test card producer
 305                         mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 306                         mlt_producer producer = mlt_factory_producer( profile, NULL, test_card );
 307
 308                         // Do we have a producer
 309                         if ( producer != NULL )
 310                         {
 311                                 // Test card should loop I guess...
 312                                 mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
 313                                 //mlt_producer_set_speed( producer, 0 );
 314                                 //mlt_producer_set_in_and_out( producer, 0, 0 );
 315
 316                                 // Set the test card on the consumer
 317                                 mlt_properties_set_data( properties, "test_card_producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
 318                         }
 319                 }
 320         }
 321         else
 322         {
 323                 // Allow the hash table to speed things up
 324                 mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 325         }
 326
 327         // Set the frame duration in microseconds for the frame-dropping heuristic
 328         int frame_duration = 1000000 / mlt_properties_get_int( properties, "frame_rate_num" ) *
 329                         mlt_properties_get_int( properties, "frame_rate_den" );
 330         mlt_properties_set_int( properties, "frame_duration", frame_duration );
 331
 332         // Check and run an ante command
 333         if ( mlt_properties_get( properties, "ante" ) )
 334                 system( mlt_properties_get( properties, "ante" ) );
 335
 336         // Set the real_time preference
 337         this->real_time = mlt_properties_get_int( properties, "real_time" );
 338
 339         // Start the service
 340         if ( this->start != NULL )
 341                 return this->start( this );
 342
 343         return 0;
 344 }
 345
 346 /** An alternative method to feed frames into the consumer - only valid if
 347         the consumer itself is not connected.
 348 */
 349
 350 int mlt_consumer_put_frame( mlt_consumer this, mlt_frame frame )
 351 {
 352         int error = 1;
 353
 354         // Get the service assoicated to the consumer
 355         mlt_service service = MLT_CONSUMER_SERVICE( this );
 356
 357         if ( mlt_service_producer( service ) == NULL )
 358         {
 359                 struct timeval now;
 360                 struct timespec tm;
 361                 pthread_mutex_lock( &this->put_mutex );
 362                 while ( this->put_active && this->put != NULL )
 363                 {
 364                         gettimeofday( &now, NULL );
 365                         tm.tv_sec = now.tv_sec + 1;
 366                         tm.tv_nsec = now.tv_usec * 1000;
 367                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 368                 }
 369                 if ( this->put_active && this->put == NULL )
 370                         this->put = frame;
 371                 else
 372                         mlt_frame_close( frame );
 373                 pthread_cond_broadcast( &this->put_cond );
 374                 pthread_mutex_unlock( &this->put_mutex );
 375         }
 376         else
 377         {
 378                 mlt_frame_close( frame );
 379         }
 380
 381         return error;
 382 }
 383
 384 /** Protected method for consumer to get frames from connected service
 385 */
 386
 387 mlt_frame mlt_consumer_get_frame( mlt_consumer this )
 388 {
 389         // Frame to return
 390         mlt_frame frame = NULL;
 391
 392         // Get the service assoicated to the consumer
 393         mlt_service service = MLT_CONSUMER_SERVICE( this );
 394
 395         // Get the consumer properties
 396         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 397
 398         // Get the frame
 399         if ( mlt_service_producer( service ) == NULL && mlt_properties_get_int( properties, "put_mode" ) )
 400         {
 401                 struct timeval now;
 402                 struct timespec tm;
 403                 pthread_mutex_lock( &this->put_mutex );
 404                 while ( this->put_active && this->put == NULL )
 405                 {
 406                         gettimeofday( &now, NULL );
 407                         tm.tv_sec = now.tv_sec + 1;
 408                         tm.tv_nsec = now.tv_usec * 1000;
 409                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 410                 }
 411                 frame = this->put;
 412                 this->put = NULL;
 413                 pthread_cond_broadcast( &this->put_cond );
 414                 pthread_mutex_unlock( &this->put_mutex );
 415                 if ( frame != NULL )
 416                         mlt_service_apply_filters( service, frame, 0 );
 417         }
 418         else if ( mlt_service_producer( service ) != NULL )
 419         {
 420                 mlt_service_get_frame( service, &frame, 0 );
 421         }
 422         else
 423         {
 424                 frame = mlt_frame_init( service );
 425         }
 426
 427         if ( frame != NULL )
 428         {
 429                 // Get the frame properties
 430                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
 431
 432                 // Get the test card producer
 433                 mlt_producer test_card = mlt_properties_get_data( properties, "test_card_producer", NULL );
 434
 435                 // Attach the test frame producer to it.
 436                 if ( test_card != NULL )
 437                         mlt_properties_set_data( frame_properties, "test_card_producer", test_card, 0, NULL, NULL );
 438
 439                 // Attach the rescale property
 440                 mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale" ) );
 441
 442                 // Aspect ratio and other jiggery pokery
 443                 mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
 444                 mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" ) );
 445                 mlt_properties_set( frame_properties, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
 446         }
 447
 448         // Return the frame
 449         return frame;
 450 }
 451
 452 static inline long time_difference( struct timeval *time1 )
 453 {
 454         struct timeval time2;
 455         time2.tv_sec = time1->tv_sec;
 456         time2.tv_usec = time1->tv_usec;
 457         gettimeofday( time1, NULL );
 458         return time1->tv_sec * 1000000 + time1->tv_usec - time2.tv_sec * 1000000 - time2.tv_usec;
 459 }
 460
 461 static void *consumer_read_ahead_thread( void *arg )
 462 {
 463         // The argument is the consumer
 464         mlt_consumer this = arg;
 465
 466         // Get the properties of the consumer
 467         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 468
 469         // Get the width and height
 470         int width = mlt_properties_get_int( properties, "width" );
 471         int height = mlt_properties_get_int( properties, "height" );
 472
 473         // See if video is turned off
 474         int video_off = mlt_properties_get_int( properties, "video_off" );
 475         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 476         int preview_format = mlt_properties_get_int( properties, "preview_format" );
 477
 478         // Get the audio settings
 479         mlt_audio_format afmt = mlt_audio_pcm;
 480         int counter = 0;
 481         double fps = mlt_properties_get_double( properties, "fps" );
 482         int channels = mlt_properties_get_int( properties, "channels" );
 483         int frequency = mlt_properties_get_int( properties, "frequency" );
 484         int samples = 0;
 485         int16_t *pcm = NULL;
 486
 487         // See if audio is turned off
 488         int audio_off = mlt_properties_get_int( properties, "audio_off" );
 489
 490         // Get the maximum size of the buffer
 491         int buffer = mlt_properties_get_int( properties, "buffer" ) + 1;
 492
 493         // General frame variable
 494         mlt_frame frame = NULL;
 495         uint8_t *image = NULL;
 496
 497         // Time structures
 498         struct timeval ante;
 499
 500         // Average time for get_frame and get_image
 501         int count = 1;
 502         int skipped = 0;
 503         int64_t time_wait = 0;
 504         int64_t time_frame = 0;
 505         int64_t time_process = 0;
 506         int skip_next = 0;
 507         mlt_service lock_object = NULL;
 508
 509         if ( preview_off && preview_format != 0 )
 510                 this->format = preview_format;
 511
 512         // Get the first frame
 513         frame = mlt_consumer_get_frame( this );
 514
 515         // Get the lock object
 516         lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 517
 518         // Lock it
 519         if ( lock_object ) mlt_service_lock( lock_object );
 520
 521         // Get the image of the first frame
 522         if ( !video_off )
 523         {
 524                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 525                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 526         }
 527
 528         if ( !audio_off )
 529         {
 530                 samples = mlt_sample_calculator( fps, frequency, counter++ );
 531                 mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 532         }
 533
 534         // Unlock the lock object
 535         if ( lock_object ) mlt_service_unlock( lock_object );
 536
 537         // Mark as rendered
 538         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 539
 540         // Get the starting time (can ignore the times above)
 541         gettimeofday( &ante, NULL );
 542
 543         // Continue to read ahead
 544         while ( this->ahead )
 545         {
 546                 // Fetch width/height again
 547                 width = mlt_properties_get_int( properties, "width" );
 548                 height = mlt_properties_get_int( properties, "height" );
 549
 550                 // Put the current frame into the queue
 551                 pthread_mutex_lock( &this->mutex );
 552                 while( this->ahead && mlt_deque_count( this->queue ) >= buffer )
 553                         pthread_cond_wait( &this->cond, &this->mutex );
 554                 mlt_deque_push_back( this->queue, frame );
 555                 pthread_cond_broadcast( &this->cond );
 556                 pthread_mutex_unlock( &this->mutex );
 557
 558                 time_wait += time_difference( &ante );
 559
 560                 // Get the next frame
 561                 frame = mlt_consumer_get_frame( this );
 562                 time_frame += time_difference( &ante );
 563
 564                 // If there's no frame, we're probably stopped...
 565                 if ( frame == NULL )
 566                         continue;
 567
 568                 // Attempt to fetch the lock object
 569                 lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 570
 571                 // Increment the count
 572                 count ++;
 573
 574                 // Lock if there's a lock object
 575                 if ( lock_object ) mlt_service_lock( lock_object );
 576
 577                 // All non normal playback frames should be shown
 578                 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "_speed" ) != 1 )
 579                 {
 580 #ifdef DEINTERLACE_ON_NOT_NORMAL_SPEED
 581                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "consumer_deinterlace", 1 );
 582 #endif
 583                         skipped = 0;
 584                         time_frame = 0;
 585                         time_process = 0;
 586                         time_wait = 0;
 587                         count = 1;
 588                         skip_next = 0;
 589                 }
 590
 591                 // Get the image
 592                 if ( !skip_next || this->real_time == -1 )
 593                 {
 594                         // Get the image, mark as rendered and time it
 595                         if ( !video_off )
 596                         {
 597                                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 598                                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 599                         }
 600                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 601                 }
 602                 else
 603                 {
 604                         // Increment the number of sequentially skipped frames
 605                         skipped ++;
 606                         skip_next = 0;
 607
 608                         // If we've reached an unacceptable level, reset everything
 609                         if ( skipped > 5 )
 610                         {
 611                                 skipped = 0;
 612                                 time_frame = 0;
 613                                 time_process = 0;
 614                                 time_wait = 0;
 615                                 count = 1;
 616                         }
 617                 }
 618
 619                 // Always process audio
 620                 if ( !audio_off )
 621                 {
 622                         samples = mlt_sample_calculator( fps, frequency, counter++ );
 623                         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 624                 }
 625
 626                 // Increment the time take for this frame
 627                 time_process += time_difference( &ante );
 628
 629                 // Determine if the next frame should be skipped
 630                 if ( mlt_deque_count( this->queue ) <= 5 )
 631                 {
 632                         int frame_duration = mlt_properties_get_int( properties, "frame_duration" );
 633                         if ( ( ( time_wait + time_frame + time_process ) / count ) > frame_duration )
 634                                 skip_next = 1;
 635                 }
 636
 637                 // Unlock if there's a lock object
 638                 if ( lock_object ) mlt_service_unlock( lock_object );
 639         }
 640
 641         // Remove the last frame
 642         mlt_frame_close( frame );
 643
 644         return NULL;
 645 }
 646
 647 static void consumer_read_ahead_start( mlt_consumer this )
 648 {
 649         // We're running now
 650         this->ahead = 1;
 651
 652         // Create the frame queue
 653         this->queue = mlt_deque_init( );
 654
 655         // Create the mutex
 656         pthread_mutex_init( &this->mutex, NULL );
 657
 658         // Create the condition
 659         pthread_cond_init( &this->cond, NULL );
 660
 661         // Create the read ahead
 662         pthread_create( &this->ahead_thread, NULL, consumer_read_ahead_thread, this );
 663 }
 664
 665 static void consumer_read_ahead_stop( mlt_consumer this )
 666 {
 667         // Make sure we're running
 668         if ( this->ahead )
 669         {
 670                 // Inform thread to stop
 671                 this->ahead = 0;
 672
 673                 // Broadcast to the condition in case it's waiting
 674                 pthread_mutex_lock( &this->mutex );
 675                 pthread_cond_broadcast( &this->cond );
 676                 pthread_mutex_unlock( &this->mutex );
 677
 678                 // Broadcast to the put condition in case it's waiting
 679                 pthread_mutex_lock( &this->put_mutex );
 680                 pthread_cond_broadcast( &this->put_cond );
 681                 pthread_mutex_unlock( &this->put_mutex );
 682
 683                 // Join the thread
 684                 pthread_join( this->ahead_thread, NULL );
 685
 686                 // Destroy the mutex
 687                 pthread_mutex_destroy( &this->mutex );
 688
 689                 // Destroy the condition
 690                 pthread_cond_destroy( &this->cond );
 691
 692                 // Wipe the queue
 693                 while ( mlt_deque_count( this->queue ) )
 694                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 695
 696                 // Close the queue
 697                 mlt_deque_close( this->queue );
 698         }
 699 }
 700
 701 void mlt_consumer_purge( mlt_consumer this )
 702 {
 703         if ( this->ahead )
 704         {
 705                 pthread_mutex_lock( &this->mutex );
 706                 while ( mlt_deque_count( this->queue ) )
 707                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 708                 pthread_cond_broadcast( &this->cond );
 709                 pthread_mutex_unlock( &this->mutex );
 710         }
 711 }
 712
 713 mlt_frame mlt_consumer_rt_frame( mlt_consumer this )
 714 {
 715         // Frame to return
 716         mlt_frame frame = NULL;
 717
 718         // Get the properties
 719         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 720
 721         // Check if the user has requested real time or not
 722         if ( this->real_time )
 723         {
 724                 int size = 1;
 725
 726                 // Is the read ahead running?
 727                 if ( this->ahead == 0 )
 728                 {
 729                         int buffer = mlt_properties_get_int( properties, "buffer" );
 730                         int prefill = mlt_properties_get_int( properties, "prefill" );
 731                         consumer_read_ahead_start( this );
 732                         if ( buffer > 1 )
 733                                 size = prefill > 0 && prefill < buffer ? prefill : buffer;
 734                 }
 735
 736                 // Get frame from queue
 737                 pthread_mutex_lock( &this->mutex );
 738                 while( this->ahead && mlt_deque_count( this->queue ) < size )
 739                         pthread_cond_wait( &this->cond, &this->mutex );
 740                 frame = mlt_deque_pop_front( this->queue );
 741                 pthread_cond_broadcast( &this->cond );
 742                 pthread_mutex_unlock( &this->mutex );
 743         }
 744         else
 745         {
 746                 // Get the frame in non real time
 747                 frame = mlt_consumer_get_frame( this );
 748
 749                 // This isn't true, but from the consumers perspective it is
 750                 if ( frame != NULL )
 751                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 752         }
 753
 754         return frame;
 755 }
 756
 757 /** Callback for the implementation to indicate a stopped condition.
 758 */
 759
 760 void mlt_consumer_stopped( mlt_consumer this )
 761 {
 762         mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( this ), "running", 0 );
 763         mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-stopped", NULL );
 764         mlt_event_unblock( this->event_listener );
 765 }
 766
 767 /** Stop the consumer.
 768 */
 769
 770 int mlt_consumer_stop( mlt_consumer this )
 771 {
 772         // Get the properies
 773         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 774         char *debug = mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "debug" );
 775
 776         // Just in case...
 777         if ( debug ) fprintf( stderr, "%s: stopping put waiting\n", debug );
 778         pthread_mutex_lock( &this->put_mutex );
 779         this->put_active = 0;
 780         pthread_cond_broadcast( &this->put_cond );
 781         pthread_mutex_unlock( &this->put_mutex );
 782
 783         // Stop the consumer
 784         if ( debug ) fprintf( stderr, "%s: stopping consumer\n", debug );
 785         if ( this->stop != NULL )
 786                 this->stop( this );
 787
 788         // Check if the user has requested real time or not and stop if necessary
 789         if ( debug ) fprintf( stderr, "%s: stopping read_ahead\n", debug );
 790         if ( mlt_properties_get_int( properties, "real_time" ) )
 791                 consumer_read_ahead_stop( this );
 792
 793         // Kill the test card
 794         mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 795
 796         // Check and run a post command
 797         if ( mlt_properties_get( properties, "post" ) )
 798                 system( mlt_properties_get( properties, "post" ) );
 799
 800         if ( debug ) fprintf( stderr, "%s: stopped\n", debug );
 801
 802         return 0;
 803 }
 804
 805 /** Determine if the consumer is stopped.
 806 */
 807
 808 int mlt_consumer_is_stopped( mlt_consumer this )
 809 {
 810         // Check if the consumer is stopped
 811         if ( this->is_stopped != NULL )
 812                 return this->is_stopped( this );
 813
 814         return 0;
 815 }
 816
 817 /** Close the consumer.
 818 */
 819
 820 void mlt_consumer_close( mlt_consumer this )
 821 {
 822         if ( this != NULL && mlt_properties_dec_ref( MLT_CONSUMER_PROPERTIES( this ) ) <= 0 )
 823         {
 824                 // Get the childs close function
 825                 void ( *consumer_close )( ) = this->close;
 826
 827                 if ( consumer_close )
 828                 {
 829                         // Just in case...
 830                         //mlt_consumer_stop( this );
 831
 832                         this->close = NULL;
 833                         consumer_close( this );
 834                 }
 835                 else
 836                 {
 837                         // Make sure it only gets called once
 838                         this->parent.close = NULL;
 839
 840                         // Destroy the push mutex and condition
 841                         pthread_mutex_destroy( &this->put_mutex );
 842                         pthread_cond_destroy( &this->put_cond );
 843
 844                         mlt_service_close( &this->parent );
 845                 }
 846         }
 847 }