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 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  33 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  34 static void mlt_consumer_property_changed( mlt_service owner, mlt_consumer this, char *name );
  35 static void apply_profile_properties( mlt_consumer this, mlt_profile profile, mlt_properties properties );
  36
  37 /** Public final methods
  38 */
  39
  40 int mlt_consumer_init( mlt_consumer this, void *child, mlt_profile profile )
  41 {
  42         int error = 0;
  43         memset( this, 0, sizeof( struct mlt_consumer_s ) );
  44         this->child = child;
  45         error = mlt_service_init( &this->parent, this );
  46         if ( error == 0 )
  47         {
  48                 // Get the properties from the service
  49                 mlt_properties properties = MLT_SERVICE_PROPERTIES( &this->parent );
  50
  51                 // Apply profile to properties
  52                 if ( profile == NULL )
  53                 {
  54                         // Normally the application creates the profile and controls its lifetime
  55                         // This is the fallback exception handling
  56                         profile = mlt_profile_init( NULL );
  57                         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
  58                         mlt_properties_set_data( properties, "_profile", profile, 0, (mlt_destructor)mlt_profile_close, NULL );
  59                 }
  60                 apply_profile_properties( this, profile, properties );
  61
  62                 // Default rescaler for all consumers
  63                 mlt_properties_set( properties, "rescale", "bilinear" );
  64
  65                 // Default read ahead buffer size
  66                 mlt_properties_set_int( properties, "buffer", 25 );
  67
  68                 // Default audio frequency and channels
  69                 mlt_properties_set_int( properties, "frequency", 48000 );
  70                 mlt_properties_set_int( properties, "channels", 2 );
  71
  72                 // Default of all consumers is real time
  73                 mlt_properties_set_int( properties, "real_time", 1 );
  74
  75                 // Default to environment test card
  76                 mlt_properties_set( properties, "test_card", mlt_environment( "MLT_TEST_CARD" ) );
  77
  78                 // Hmm - default all consumers to yuv422 :-/
  79                 this->format = mlt_image_yuv422;
  80
  81                 mlt_events_register( properties, "consumer-frame-show", ( mlt_transmitter )mlt_consumer_frame_show );
  82                 mlt_events_register( properties, "consumer-frame-render", ( mlt_transmitter )mlt_consumer_frame_render );
  83                 mlt_events_register( properties, "consumer-stopped", NULL );
  84
  85                 // Register a property-changed listener to handle the profile property -
  86                 // subsequent properties can override the profile
  87                 this->event_listener = mlt_events_listen( properties, this, "property-changed", ( mlt_listener )mlt_consumer_property_changed );
  88
  89                 // Create the push mutex and condition
  90                 pthread_mutex_init( &this->put_mutex, NULL );
  91                 pthread_cond_init( &this->put_cond, NULL );
  92
  93         }
  94         return error;
  95 }
  96
  97 static void apply_profile_properties( mlt_consumer this, mlt_profile profile, mlt_properties properties )
  98 {
  99         mlt_event_block( this->event_listener );
 100         mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
 101         mlt_properties_set_int( properties, "frame_rate_num", profile->frame_rate_num );
 102         mlt_properties_set_int( properties, "frame_rate_den", profile->frame_rate_den );
 103         mlt_properties_set_int( properties, "width", profile->width );
 104         mlt_properties_set_int( properties, "height", profile->height );
 105         mlt_properties_set_int( properties, "progressive", profile->progressive );
 106         mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile )  );
 107         mlt_properties_set_int( properties, "sample_aspect_num", profile->sample_aspect_num );
 108         mlt_properties_set_int( properties, "sample_aspect_den", profile->sample_aspect_den );
 109         mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile )  );
 110         mlt_properties_set_int( properties, "display_aspect_num", profile->display_aspect_num );
 111         mlt_properties_set_int( properties, "display_aspect_num", profile->display_aspect_num );
 112         mlt_event_unblock( this->event_listener );
 113 }
 114
 115 static void mlt_consumer_property_changed( mlt_service owner, mlt_consumer this, char *name )
 116 {
 117         if ( !strcmp( name, "profile" ) )
 118         {
 119                 // Get the properies
 120                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 121
 122                 // Get the current profile
 123                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 124
 125                 // Load the new profile
 126                 mlt_profile new_profile = mlt_profile_init( mlt_properties_get( properties, name ) );
 127
 128                 if ( new_profile )
 129                 {
 130                         // Copy the profile
 131                         if ( profile != NULL )
 132                         {
 133                                 free( profile->description );
 134                                 memcpy( profile, new_profile, sizeof( struct mlt_profile_s ) );
 135                                 profile->description = strdup( new_profile->description );
 136                                 mlt_profile_close( new_profile );
 137                         }
 138                         else
 139                         {
 140                                 profile = new_profile;
 141                         }
 142
 143                         // Apply to properties
 144                         apply_profile_properties( this, profile, properties );
 145                 }
 146         }
 147         else if ( !strcmp( name, "frame_rate_num" ) )
 148         {
 149                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 150                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 151                 if ( profile )
 152                 {
 153                         profile->frame_rate_num = mlt_properties_get_int( properties, "frame_rate_num" );
 154                         mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
 155                 }
 156         }
 157         else if ( !strcmp( name, "frame_rate_den" ) )
 158         {
 159                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 160                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 161                 if ( profile )
 162                 {
 163                         profile->frame_rate_den = mlt_properties_get_int( properties, "frame_rate_den" );
 164                         mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
 165                 }
 166         }
 167         else if ( !strcmp( name, "width" ) )
 168         {
 169                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 170                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 171                 if ( profile )
 172                         profile->width = mlt_properties_get_int( properties, "width" );
 173         }
 174         else if ( !strcmp( name, "height" ) )
 175         {
 176                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 177                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 178                 if ( profile )
 179                         profile->height = mlt_properties_get_int( properties, "height" );
 180         }
 181         else if ( !strcmp( name, "progressive" ) )
 182         {
 183                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 184                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 185                 if ( profile )
 186                         profile->progressive = mlt_properties_get_int( properties, "progressive" );
 187         }
 188         else if ( !strcmp( name, "sample_aspect_num" ) )
 189         {
 190                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 191                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 192                 profile->sample_aspect_num = mlt_properties_get_int( properties, "sample_aspect_num" );
 193                 if ( profile )
 194                         mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile )  );
 195         }
 196         else if ( !strcmp( name, "sample_aspect_den" ) )
 197         {
 198                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 199                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 200                 profile->sample_aspect_den = mlt_properties_get_int( properties, "sample_aspect_den" );
 201                 if ( profile )
 202                         mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile )  );
 203         }
 204         else if ( !strcmp( name, "display_aspect_num" ) )
 205         {
 206                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 207                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 208                 if ( profile )
 209                 {
 210                         profile->display_aspect_num = mlt_properties_get_int( properties, "display_aspect_num" );
 211                         mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile )  );
 212                 }
 213         }
 214         else if ( !strcmp( name, "display_aspect_den" ) )
 215         {
 216                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 217                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 218                 if ( profile )
 219                 {
 220                         profile->display_aspect_den = mlt_properties_get_int( properties, "display_aspect_den" );
 221                         mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile )  );
 222                 }
 223         }
 224 }
 225
 226 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 227 {
 228         if ( listener != NULL )
 229                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 230 }
 231
 232 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 233 {
 234         if ( listener != NULL )
 235                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 236 }
 237
 238 /** Create a new consumer.
 239 */
 240
 241 mlt_consumer mlt_consumer_new( mlt_profile profile )
 242 {
 243         // Create the memory for the structure
 244         mlt_consumer this = malloc( sizeof( struct mlt_consumer_s ) );
 245
 246         // Initialise it
 247         if ( this != NULL )
 248                 mlt_consumer_init( this, NULL, profile );
 249
 250         // Return it
 251         return this;
 252 }
 253
 254 /** Get the parent service object.
 255 */
 256
 257 mlt_service mlt_consumer_service( mlt_consumer this )
 258 {
 259         return this != NULL ? &this->parent : NULL;
 260 }
 261
 262 /** Get the consumer properties.
 263 */
 264
 265 mlt_properties mlt_consumer_properties( mlt_consumer this )
 266 {
 267         return this != NULL ? MLT_SERVICE_PROPERTIES( &this->parent ) : NULL;
 268 }
 269
 270 /** Connect the consumer to the producer.
 271 */
 272
 273 int mlt_consumer_connect( mlt_consumer this, mlt_service producer )
 274 {
 275         return mlt_service_connect_producer( &this->parent, producer, 0 );
 276 }
 277
 278 /** Start the consumer.
 279 */
 280
 281 int mlt_consumer_start( mlt_consumer this )
 282 {
 283         // Stop listening to the property-changed event
 284         mlt_event_block( this->event_listener );
 285
 286         // Get the properies
 287         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 288
 289         // Determine if there's a test card producer
 290         char *test_card = mlt_properties_get( properties, "test_card" );
 291
 292         // Just to make sure nothing is hanging around...
 293         mlt_frame_close( this->put );
 294         this->put = NULL;
 295         this->put_active = 1;
 296
 297         // Deal with it now.
 298         if ( test_card != NULL )
 299         {
 300                 if ( mlt_properties_get_data( properties, "test_card_producer", NULL ) == NULL )
 301                 {
 302                         // Create a test card producer
 303                         mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 304                         mlt_producer producer = mlt_factory_producer( profile, NULL, test_card );
 305
 306                         // Do we have a producer
 307                         if ( producer != NULL )
 308                         {
 309                                 // Test card should loop I guess...
 310                                 mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
 311                                 //mlt_producer_set_speed( producer, 0 );
 312                                 //mlt_producer_set_in_and_out( producer, 0, 0 );
 313
 314                                 // Set the test card on the consumer
 315                                 mlt_properties_set_data( properties, "test_card_producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
 316                         }
 317                 }
 318         }
 319         else
 320         {
 321                 // Allow the hash table to speed things up
 322                 mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 323         }
 324
 325         // Check and run an ante command
 326         if ( mlt_properties_get( properties, "ante" ) )
 327                 system( mlt_properties_get( properties, "ante" ) );
 328
 329         // Set the real_time preference
 330         this->real_time = mlt_properties_get_int( properties, "real_time" );
 331
 332         // Start the service
 333         if ( this->start != NULL )
 334                 return this->start( this );
 335
 336         return 0;
 337 }
 338
 339 /** An alternative method to feed frames into the consumer - only valid if
 340         the consumer itself is not connected.
 341 */
 342
 343 int mlt_consumer_put_frame( mlt_consumer this, mlt_frame frame )
 344 {
 345         int error = 1;
 346
 347         // Get the service assoicated to the consumer
 348         mlt_service service = MLT_CONSUMER_SERVICE( this );
 349
 350         if ( mlt_service_producer( service ) == NULL )
 351         {
 352                 struct timeval now;
 353                 struct timespec tm;
 354                 pthread_mutex_lock( &this->put_mutex );
 355                 while ( this->put_active && this->put != NULL )
 356                 {
 357                         gettimeofday( &now, NULL );
 358                         tm.tv_sec = now.tv_sec + 1;
 359                         tm.tv_nsec = now.tv_usec * 1000;
 360                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 361                 }
 362                 if ( this->put_active && this->put == NULL )
 363                         this->put = frame;
 364                 else
 365                         mlt_frame_close( frame );
 366                 pthread_cond_broadcast( &this->put_cond );
 367                 pthread_mutex_unlock( &this->put_mutex );
 368         }
 369         else
 370         {
 371                 mlt_frame_close( frame );
 372         }
 373
 374         return error;
 375 }
 376
 377 /** Protected method for consumer to get frames from connected service
 378 */
 379
 380 mlt_frame mlt_consumer_get_frame( mlt_consumer this )
 381 {
 382         // Frame to return
 383         mlt_frame frame = NULL;
 384
 385         // Get the service assoicated to the consumer
 386         mlt_service service = MLT_CONSUMER_SERVICE( this );
 387
 388         // Get the consumer properties
 389         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 390
 391         // Get the frame
 392         if ( mlt_service_producer( service ) == NULL && mlt_properties_get_int( properties, "put_mode" ) )
 393         {
 394                 struct timeval now;
 395                 struct timespec tm;
 396                 pthread_mutex_lock( &this->put_mutex );
 397                 while ( this->put_active && this->put == NULL )
 398                 {
 399                         gettimeofday( &now, NULL );
 400                         tm.tv_sec = now.tv_sec + 1;
 401                         tm.tv_nsec = now.tv_usec * 1000;
 402                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 403                 }
 404                 frame = this->put;
 405                 this->put = NULL;
 406                 pthread_cond_broadcast( &this->put_cond );
 407                 pthread_mutex_unlock( &this->put_mutex );
 408                 if ( frame != NULL )
 409                         mlt_service_apply_filters( service, frame, 0 );
 410         }
 411         else if ( mlt_service_producer( service ) != NULL )
 412         {
 413                 mlt_service_get_frame( service, &frame, 0 );
 414         }
 415         else
 416         {
 417                 frame = mlt_frame_init( service );
 418         }
 419
 420         if ( frame != NULL )
 421         {
 422                 // Get the frame properties
 423                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
 424
 425                 // Get the test card producer
 426                 mlt_producer test_card = mlt_properties_get_data( properties, "test_card_producer", NULL );
 427
 428                 // Attach the test frame producer to it.
 429                 if ( test_card != NULL )
 430                         mlt_properties_set_data( frame_properties, "test_card_producer", test_card, 0, NULL, NULL );
 431
 432                 // Attach the rescale property
 433                 mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale" ) );
 434
 435                 // Aspect ratio and other jiggery pokery
 436                 mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
 437                 mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" ) );
 438                 mlt_properties_set( frame_properties, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
 439         }
 440
 441         // Return the frame
 442         return frame;
 443 }
 444
 445 static inline long time_difference( struct timeval *time1 )
 446 {
 447         struct timeval time2;
 448         time2.tv_sec = time1->tv_sec;
 449         time2.tv_usec = time1->tv_usec;
 450         gettimeofday( time1, NULL );
 451         return time1->tv_sec * 1000000 + time1->tv_usec - time2.tv_sec * 1000000 - time2.tv_usec;
 452 }
 453
 454 static void *consumer_read_ahead_thread( void *arg )
 455 {
 456         // The argument is the consumer
 457         mlt_consumer this = arg;
 458
 459         // Get the properties of the consumer
 460         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 461
 462         // Get the width and height
 463         int width = mlt_properties_get_int( properties, "width" );
 464         int height = mlt_properties_get_int( properties, "height" );
 465
 466         // See if video is turned off
 467         int video_off = mlt_properties_get_int( properties, "video_off" );
 468         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 469         int preview_format = mlt_properties_get_int( properties, "preview_format" );
 470
 471         // Get the audio settings
 472         mlt_audio_format afmt = mlt_audio_pcm;
 473         int counter = 0;
 474         double fps = mlt_properties_get_double( properties, "fps" );
 475         int channels = mlt_properties_get_int( properties, "channels" );
 476         int frequency = mlt_properties_get_int( properties, "frequency" );
 477         int samples = 0;
 478         int16_t *pcm = NULL;
 479
 480         // See if audio is turned off
 481         int audio_off = mlt_properties_get_int( properties, "audio_off" );
 482
 483         // Get the maximum size of the buffer
 484         int buffer = mlt_properties_get_int( properties, "buffer" ) + 1;
 485
 486         // General frame variable
 487         mlt_frame frame = NULL;
 488         uint8_t *image = NULL;
 489
 490         // Time structures
 491         struct timeval ante;
 492
 493         // Average time for get_frame and get_image
 494         int count = 1;
 495         int skipped = 0;
 496         int64_t time_wait = 0;
 497         int64_t time_frame = 0;
 498         int64_t time_process = 0;
 499         int skip_next = 0;
 500         mlt_service lock_object = NULL;
 501
 502         if ( preview_off && preview_format != 0 )
 503                 this->format = preview_format;
 504
 505         // Get the first frame
 506         frame = mlt_consumer_get_frame( this );
 507
 508         // Get the lock object
 509         lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 510
 511         // Lock it
 512         if ( lock_object ) mlt_service_lock( lock_object );
 513
 514         // Get the image of the first frame
 515         if ( !video_off )
 516         {
 517                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 518                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 519         }
 520
 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         // Unlock the lock object
 528         if ( lock_object ) mlt_service_unlock( lock_object );
 529
 530         // Mark as rendered
 531         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 532
 533         // Get the starting time (can ignore the times above)
 534         gettimeofday( &ante, NULL );
 535
 536         // Continue to read ahead
 537         while ( this->ahead )
 538         {
 539                 // Fetch width/height again
 540                 width = mlt_properties_get_int( properties, "width" );
 541                 height = mlt_properties_get_int( properties, "height" );
 542
 543                 // Put the current frame into the queue
 544                 pthread_mutex_lock( &this->mutex );
 545                 while( this->ahead && mlt_deque_count( this->queue ) >= buffer )
 546                         pthread_cond_wait( &this->cond, &this->mutex );
 547                 mlt_deque_push_back( this->queue, frame );
 548                 pthread_cond_broadcast( &this->cond );
 549                 pthread_mutex_unlock( &this->mutex );
 550
 551                 time_wait += time_difference( &ante );
 552
 553                 // Get the next frame
 554                 frame = mlt_consumer_get_frame( this );
 555                 time_frame += time_difference( &ante );
 556
 557                 // If there's no frame, we're probably stopped...
 558                 if ( frame == NULL )
 559                         continue;
 560
 561                 // Attempt to fetch the lock object
 562                 lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 563
 564                 // Increment the count
 565                 count ++;
 566
 567                 // Lock if there's a lock object
 568                 if ( lock_object ) mlt_service_lock( lock_object );
 569
 570                 // All non normal playback frames should be shown
 571                 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "_speed" ) != 1 )
 572                 {
 573                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "consumer_deinterlace", 1 );
 574                         skipped = 0;
 575                         time_frame = 0;
 576                         time_process = 0;
 577                         time_wait = 0;
 578                         count = 1;
 579                         skip_next = 0;
 580                 }
 581
 582                 // Get the image
 583                 if ( !skip_next )
 584                 {
 585                         // Get the image, mark as rendered and time it
 586                         if ( !video_off )
 587                         {
 588                                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 589                                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 590                         }
 591                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 592                 }
 593                 else
 594                 {
 595                         // Increment the number of sequentially skipped frames
 596                         skipped ++;
 597                         skip_next = 0;
 598
 599                         // If we've reached an unacceptable level, reset everything
 600                         if ( skipped > 5 )
 601                         {
 602                                 skipped = 0;
 603                                 time_frame = 0;
 604                                 time_process = 0;
 605                                 time_wait = 0;
 606                                 count = 1;
 607                         }
 608                 }
 609
 610                 // Always process audio
 611                 if ( !audio_off )
 612                 {
 613                         samples = mlt_sample_calculator( fps, frequency, counter++ );
 614                         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 615                 }
 616
 617                 // Increment the time take for this frame
 618                 time_process += time_difference( &ante );
 619
 620                 // Determine if the next frame should be skipped
 621                 if ( mlt_deque_count( this->queue ) <= 5 && ( ( time_wait + time_frame + time_process ) / count ) > 40000 )
 622                         skip_next = 1;
 623
 624                 // Unlock if there's a lock object
 625                 if ( lock_object ) mlt_service_unlock( lock_object );
 626         }
 627
 628         // Remove the last frame
 629         mlt_frame_close( frame );
 630
 631         return NULL;
 632 }
 633
 634 static void consumer_read_ahead_start( mlt_consumer this )
 635 {
 636         // We're running now
 637         this->ahead = 1;
 638
 639         // Create the frame queue
 640         this->queue = mlt_deque_init( );
 641
 642         // Create the mutex
 643         pthread_mutex_init( &this->mutex, NULL );
 644
 645         // Create the condition
 646         pthread_cond_init( &this->cond, NULL );
 647
 648         // Create the read ahead
 649         pthread_create( &this->ahead_thread, NULL, consumer_read_ahead_thread, this );
 650 }
 651
 652 static void consumer_read_ahead_stop( mlt_consumer this )
 653 {
 654         // Make sure we're running
 655         if ( this->ahead )
 656         {
 657                 // Inform thread to stop
 658                 this->ahead = 0;
 659
 660                 // Broadcast to the condition in case it's waiting
 661                 pthread_mutex_lock( &this->mutex );
 662                 pthread_cond_broadcast( &this->cond );
 663                 pthread_mutex_unlock( &this->mutex );
 664
 665                 // Broadcast to the put condition in case it's waiting
 666                 pthread_mutex_lock( &this->put_mutex );
 667                 pthread_cond_broadcast( &this->put_cond );
 668                 pthread_mutex_unlock( &this->put_mutex );
 669
 670                 // Join the thread
 671                 pthread_join( this->ahead_thread, NULL );
 672
 673                 // Destroy the mutex
 674                 pthread_mutex_destroy( &this->mutex );
 675
 676                 // Destroy the condition
 677                 pthread_cond_destroy( &this->cond );
 678
 679                 // Wipe the queue
 680                 while ( mlt_deque_count( this->queue ) )
 681                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 682
 683                 // Close the queue
 684                 mlt_deque_close( this->queue );
 685         }
 686 }
 687
 688 void mlt_consumer_purge( mlt_consumer this )
 689 {
 690         if ( this->ahead )
 691         {
 692                 pthread_mutex_lock( &this->mutex );
 693                 while ( mlt_deque_count( this->queue ) )
 694                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 695                 pthread_cond_broadcast( &this->cond );
 696                 pthread_mutex_unlock( &this->mutex );
 697         }
 698 }
 699
 700 mlt_frame mlt_consumer_rt_frame( mlt_consumer this )
 701 {
 702         // Frame to return
 703         mlt_frame frame = NULL;
 704
 705         // Get the properties
 706         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 707
 708         // Check if the user has requested real time or not
 709         if ( this->real_time )
 710         {
 711                 int size = 1;
 712
 713                 // Is the read ahead running?
 714                 if ( this->ahead == 0 )
 715                 {
 716                         int buffer = mlt_properties_get_int( properties, "buffer" );
 717                         int prefill = mlt_properties_get_int( properties, "prefill" );
 718                         consumer_read_ahead_start( this );
 719                         if ( buffer > 1 )
 720                                 size = prefill > 0 && prefill < buffer ? prefill : buffer;
 721                 }
 722
 723                 // Get frame from queue
 724                 pthread_mutex_lock( &this->mutex );
 725                 while( this->ahead && mlt_deque_count( this->queue ) < size )
 726                         pthread_cond_wait( &this->cond, &this->mutex );
 727                 frame = mlt_deque_pop_front( this->queue );
 728                 pthread_cond_broadcast( &this->cond );
 729                 pthread_mutex_unlock( &this->mutex );
 730         }
 731         else
 732         {
 733                 // Get the frame in non real time
 734                 frame = mlt_consumer_get_frame( this );
 735
 736                 // This isn't true, but from the consumers perspective it is
 737                 if ( frame != NULL )
 738                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 739         }
 740
 741         return frame;
 742 }
 743
 744 /** Callback for the implementation to indicate a stopped condition.
 745 */
 746
 747 void mlt_consumer_stopped( mlt_consumer this )
 748 {
 749         mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( this ), "running", 0 );
 750         mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-stopped", NULL );
 751         mlt_event_unblock( this->event_listener );
 752 }
 753
 754 /** Stop the consumer.
 755 */
 756
 757 int mlt_consumer_stop( mlt_consumer this )
 758 {
 759         // Get the properies
 760         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 761         char *debug = mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "debug" );
 762
 763         // Just in case...
 764         if ( debug ) fprintf( stderr, "%s: stopping put waiting\n", debug );
 765         pthread_mutex_lock( &this->put_mutex );
 766         this->put_active = 0;
 767         pthread_cond_broadcast( &this->put_cond );
 768         pthread_mutex_unlock( &this->put_mutex );
 769
 770         // Stop the consumer
 771         if ( debug ) fprintf( stderr, "%s: stopping consumer\n", debug );
 772         if ( this->stop != NULL )
 773                 this->stop( this );
 774
 775         // Check if the user has requested real time or not and stop if necessary
 776         if ( debug ) fprintf( stderr, "%s: stopping read_ahead\n", debug );
 777         if ( mlt_properties_get_int( properties, "real_time" ) )
 778                 consumer_read_ahead_stop( this );
 779
 780         // Kill the test card
 781         mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 782
 783         // Check and run a post command
 784         if ( mlt_properties_get( properties, "post" ) )
 785                 system( mlt_properties_get( properties, "post" ) );
 786
 787         if ( debug ) fprintf( stderr, "%s: stopped\n", debug );
 788
 789         return 0;
 790 }
 791
 792 /** Determine if the consumer is stopped.
 793 */
 794
 795 int mlt_consumer_is_stopped( mlt_consumer this )
 796 {
 797         // Check if the consumer is stopped
 798         if ( this->is_stopped != NULL )
 799                 return this->is_stopped( this );
 800
 801         return 0;
 802 }
 803
 804 /** Close the consumer.
 805 */
 806
 807 void mlt_consumer_close( mlt_consumer this )
 808 {
 809         if ( this != NULL && mlt_properties_dec_ref( MLT_CONSUMER_PROPERTIES( this ) ) <= 0 )
 810         {
 811                 // Get the childs close function
 812                 void ( *consumer_close )( ) = this->close;
 813
 814                 if ( consumer_close )
 815                 {
 816                         // Just in case...
 817                         //mlt_consumer_stop( this );
 818
 819                         this->close = NULL;
 820                         consumer_close( this );
 821                 }
 822                 else
 823                 {
 824                         // Make sure it only gets called once
 825                         this->parent.close = NULL;
 826
 827                         // Destroy the push mutex and condition
 828                         pthread_mutex_destroy( &this->put_mutex );
 829                         pthread_cond_destroy( &this->put_cond );
 830
 831                         mlt_service_close( &this->parent );
 832                 }
 833         }
 834 }