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_consumer this, mlt_profile profile, mlt_properties properties );
  37
  38 /** Public final methods
  39 */
  40
  41 int mlt_consumer_init( mlt_consumer this, void *child, mlt_profile profile )
  42 {
  43         int error = 0;
  44         memset( this, 0, sizeof( struct mlt_consumer_s ) );
  45         this->child = child;
  46         error = mlt_service_init( &this->parent, this );
  47         if ( error == 0 )
  48         {
  49                 // Get the properties from the service
  50                 mlt_properties properties = MLT_SERVICE_PROPERTIES( &this->parent );
  51
  52                 // Apply profile to properties
  53                 if ( profile == NULL )
  54                 {
  55                         // Normally the application creates the profile and controls its lifetime
  56                         // This is the fallback exception handling
  57                         profile = mlt_profile_init( NULL );
  58                         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
  59                         mlt_properties_set_data( properties, "_profile", profile, 0, (mlt_destructor)mlt_profile_close, NULL );
  60                 }
  61                 apply_profile_properties( this, profile, properties );
  62
  63                 // Default rescaler for all consumers
  64                 mlt_properties_set( properties, "rescale", "bilinear" );
  65
  66                 // Default read ahead buffer size
  67                 mlt_properties_set_int( properties, "buffer", 25 );
  68
  69                 // Default audio frequency and channels
  70                 mlt_properties_set_int( properties, "frequency", 48000 );
  71                 mlt_properties_set_int( properties, "channels", 2 );
  72
  73                 // Default of all consumers is real time
  74                 mlt_properties_set_int( properties, "real_time", 1 );
  75
  76                 // Default to environment test card
  77                 mlt_properties_set( properties, "test_card", mlt_environment( "MLT_TEST_CARD" ) );
  78
  79                 // Hmm - default all consumers to yuv422 :-/
  80                 this->format = mlt_image_yuv422;
  81
  82                 mlt_events_register( properties, "consumer-frame-show", ( mlt_transmitter )mlt_consumer_frame_show );
  83                 mlt_events_register( properties, "consumer-frame-render", ( mlt_transmitter )mlt_consumer_frame_render );
  84                 mlt_events_register( properties, "consumer-stopped", NULL );
  85
  86                 // Register a property-changed listener to handle the profile property -
  87                 // subsequent properties can override the profile
  88                 this->event_listener = mlt_events_listen( properties, this, "property-changed", ( mlt_listener )mlt_consumer_property_changed );
  89
  90                 // Create the push mutex and condition
  91                 pthread_mutex_init( &this->put_mutex, NULL );
  92                 pthread_cond_init( &this->put_cond, NULL );
  93
  94         }
  95         return error;
  96 }
  97
  98 static void apply_profile_properties( mlt_consumer this, mlt_profile profile, mlt_properties properties )
  99 {
 100         mlt_event_block( this->event_listener );
 101         mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
 102         mlt_properties_set_int( properties, "frame_rate_num", profile->frame_rate_num );
 103         mlt_properties_set_int( properties, "frame_rate_den", profile->frame_rate_den );
 104         mlt_properties_set_int( properties, "width", profile->width );
 105         mlt_properties_set_int( properties, "height", profile->height );
 106         mlt_properties_set_int( properties, "progressive", profile->progressive );
 107         mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile )  );
 108         mlt_properties_set_int( properties, "sample_aspect_num", profile->sample_aspect_num );
 109         mlt_properties_set_int( properties, "sample_aspect_den", profile->sample_aspect_den );
 110         mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile )  );
 111         mlt_properties_set_int( properties, "display_aspect_num", profile->display_aspect_num );
 112         mlt_properties_set_int( properties, "display_aspect_num", profile->display_aspect_num );
 113         mlt_event_unblock( this->event_listener );
 114 }
 115
 116 static void mlt_consumer_property_changed( mlt_service owner, mlt_consumer this, char *name )
 117 {
 118         if ( !strcmp( name, "profile" ) )
 119         {
 120                 // Get the properies
 121                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 122
 123                 // Get the current profile
 124                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 125
 126                 // Load the new profile
 127                 mlt_profile new_profile = mlt_profile_init( mlt_properties_get( properties, name ) );
 128
 129                 if ( new_profile )
 130                 {
 131                         // Copy the profile
 132                         if ( profile != NULL )
 133                         {
 134                                 free( profile->description );
 135                                 memcpy( profile, new_profile, sizeof( struct mlt_profile_s ) );
 136                                 profile->description = strdup( new_profile->description );
 137                                 mlt_profile_close( new_profile );
 138                         }
 139                         else
 140                         {
 141                                 profile = new_profile;
 142                         }
 143
 144                         // Apply to properties
 145                         apply_profile_properties( this, profile, properties );
 146                 }
 147         }
 148         else if ( !strcmp( name, "frame_rate_num" ) )
 149         {
 150                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 151                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 152                 if ( profile )
 153                 {
 154                         profile->frame_rate_num = mlt_properties_get_int( properties, "frame_rate_num" );
 155                         mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
 156                 }
 157         }
 158         else if ( !strcmp( name, "frame_rate_den" ) )
 159         {
 160                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 161                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 162                 if ( profile )
 163                 {
 164                         profile->frame_rate_den = mlt_properties_get_int( properties, "frame_rate_den" );
 165                         mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
 166                 }
 167         }
 168         else if ( !strcmp( name, "width" ) )
 169         {
 170                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 171                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 172                 if ( profile )
 173                         profile->width = mlt_properties_get_int( properties, "width" );
 174         }
 175         else if ( !strcmp( name, "height" ) )
 176         {
 177                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 178                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 179                 if ( profile )
 180                         profile->height = mlt_properties_get_int( properties, "height" );
 181         }
 182         else if ( !strcmp( name, "progressive" ) )
 183         {
 184                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 185                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 186                 if ( profile )
 187                         profile->progressive = mlt_properties_get_int( properties, "progressive" );
 188         }
 189         else if ( !strcmp( name, "sample_aspect_num" ) )
 190         {
 191                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 192                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 193                 profile->sample_aspect_num = mlt_properties_get_int( properties, "sample_aspect_num" );
 194                 if ( profile )
 195                         mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile )  );
 196         }
 197         else if ( !strcmp( name, "sample_aspect_den" ) )
 198         {
 199                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 200                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 201                 profile->sample_aspect_den = mlt_properties_get_int( properties, "sample_aspect_den" );
 202                 if ( profile )
 203                         mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile )  );
 204         }
 205         else if ( !strcmp( name, "display_aspect_num" ) )
 206         {
 207                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 208                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 209                 if ( profile )
 210                 {
 211                         profile->display_aspect_num = mlt_properties_get_int( properties, "display_aspect_num" );
 212                         mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile )  );
 213                 }
 214         }
 215         else if ( !strcmp( name, "display_aspect_den" ) )
 216         {
 217                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 218                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 219                 if ( profile )
 220                 {
 221                         profile->display_aspect_den = mlt_properties_get_int( properties, "display_aspect_den" );
 222                         mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile )  );
 223                 }
 224         }
 225 }
 226
 227 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 228 {
 229         if ( listener != NULL )
 230                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 231 }
 232
 233 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 234 {
 235         if ( listener != NULL )
 236                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 237 }
 238
 239 /** Create a new consumer.
 240 */
 241
 242 mlt_consumer mlt_consumer_new( mlt_profile profile )
 243 {
 244         // Create the memory for the structure
 245         mlt_consumer this = malloc( sizeof( struct mlt_consumer_s ) );
 246
 247         // Initialise it
 248         if ( this != NULL )
 249                 mlt_consumer_init( this, NULL, profile );
 250
 251         // Return it
 252         return this;
 253 }
 254
 255 /** Get the parent service object.
 256 */
 257
 258 mlt_service mlt_consumer_service( mlt_consumer this )
 259 {
 260         return this != NULL ? &this->parent : NULL;
 261 }
 262
 263 /** Get the consumer properties.
 264 */
 265
 266 mlt_properties mlt_consumer_properties( mlt_consumer this )
 267 {
 268         return this != NULL ? MLT_SERVICE_PROPERTIES( &this->parent ) : NULL;
 269 }
 270
 271 /** Connect the consumer to the producer.
 272 */
 273
 274 int mlt_consumer_connect( mlt_consumer this, mlt_service producer )
 275 {
 276         return mlt_service_connect_producer( &this->parent, producer, 0 );
 277 }
 278
 279 /** Start the consumer.
 280 */
 281
 282 int mlt_consumer_start( mlt_consumer this )
 283 {
 284         // Stop listening to the property-changed event
 285         mlt_event_block( this->event_listener );
 286
 287         // Get the properies
 288         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 289
 290         // Determine if there's a test card producer
 291         char *test_card = mlt_properties_get( properties, "test_card" );
 292
 293         // Just to make sure nothing is hanging around...
 294         mlt_frame_close( this->put );
 295         this->put = NULL;
 296         this->put_active = 1;
 297
 298         // Deal with it now.
 299         if ( test_card != NULL )
 300         {
 301                 if ( mlt_properties_get_data( properties, "test_card_producer", NULL ) == NULL )
 302                 {
 303                         // Create a test card producer
 304                         mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
 305                         mlt_producer producer = mlt_factory_producer( profile, NULL, test_card );
 306
 307                         // Do we have a producer
 308                         if ( producer != NULL )
 309                         {
 310                                 // Test card should loop I guess...
 311                                 mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
 312                                 //mlt_producer_set_speed( producer, 0 );
 313                                 //mlt_producer_set_in_and_out( producer, 0, 0 );
 314
 315                                 // Set the test card on the consumer
 316                                 mlt_properties_set_data( properties, "test_card_producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
 317                         }
 318                 }
 319         }
 320         else
 321         {
 322                 // Allow the hash table to speed things up
 323                 mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 324         }
 325
 326         // Check and run an ante command
 327         if ( mlt_properties_get( properties, "ante" ) )
 328                 system( mlt_properties_get( properties, "ante" ) );
 329
 330         // Set the real_time preference
 331         this->real_time = mlt_properties_get_int( properties, "real_time" );
 332
 333         // Start the service
 334         if ( this->start != NULL )
 335                 return this->start( this );
 336
 337         return 0;
 338 }
 339
 340 /** An alternative method to feed frames into the consumer - only valid if
 341         the consumer itself is not connected.
 342 */
 343
 344 int mlt_consumer_put_frame( mlt_consumer this, mlt_frame frame )
 345 {
 346         int error = 1;
 347
 348         // Get the service assoicated to the consumer
 349         mlt_service service = MLT_CONSUMER_SERVICE( this );
 350
 351         if ( mlt_service_producer( service ) == NULL )
 352         {
 353                 struct timeval now;
 354                 struct timespec tm;
 355                 pthread_mutex_lock( &this->put_mutex );
 356                 while ( this->put_active && this->put != NULL )
 357                 {
 358                         gettimeofday( &now, NULL );
 359                         tm.tv_sec = now.tv_sec + 1;
 360                         tm.tv_nsec = now.tv_usec * 1000;
 361                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 362                 }
 363                 if ( this->put_active && this->put == NULL )
 364                         this->put = frame;
 365                 else
 366                         mlt_frame_close( frame );
 367                 pthread_cond_broadcast( &this->put_cond );
 368                 pthread_mutex_unlock( &this->put_mutex );
 369         }
 370         else
 371         {
 372                 mlt_frame_close( frame );
 373         }
 374
 375         return error;
 376 }
 377
 378 /** Protected method for consumer to get frames from connected service
 379 */
 380
 381 mlt_frame mlt_consumer_get_frame( mlt_consumer this )
 382 {
 383         // Frame to return
 384         mlt_frame frame = NULL;
 385
 386         // Get the service assoicated to the consumer
 387         mlt_service service = MLT_CONSUMER_SERVICE( this );
 388
 389         // Get the consumer properties
 390         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 391
 392         // Get the frame
 393         if ( mlt_service_producer( service ) == NULL && mlt_properties_get_int( properties, "put_mode" ) )
 394         {
 395                 struct timeval now;
 396                 struct timespec tm;
 397                 pthread_mutex_lock( &this->put_mutex );
 398                 while ( this->put_active && this->put == NULL )
 399                 {
 400                         gettimeofday( &now, NULL );
 401                         tm.tv_sec = now.tv_sec + 1;
 402                         tm.tv_nsec = now.tv_usec * 1000;
 403                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 404                 }
 405                 frame = this->put;
 406                 this->put = NULL;
 407                 pthread_cond_broadcast( &this->put_cond );
 408                 pthread_mutex_unlock( &this->put_mutex );
 409                 if ( frame != NULL )
 410                         mlt_service_apply_filters( service, frame, 0 );
 411         }
 412         else if ( mlt_service_producer( service ) != NULL )
 413         {
 414                 mlt_service_get_frame( service, &frame, 0 );
 415         }
 416         else
 417         {
 418                 frame = mlt_frame_init( service );
 419         }
 420
 421         if ( frame != NULL )
 422         {
 423                 // Get the frame properties
 424                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
 425
 426                 // Get the test card producer
 427                 mlt_producer test_card = mlt_properties_get_data( properties, "test_card_producer", NULL );
 428
 429                 // Attach the test frame producer to it.
 430                 if ( test_card != NULL )
 431                         mlt_properties_set_data( frame_properties, "test_card_producer", test_card, 0, NULL, NULL );
 432
 433                 // Attach the rescale property
 434                 mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale" ) );
 435
 436                 // Aspect ratio and other jiggery pokery
 437                 mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
 438                 mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" ) );
 439                 mlt_properties_set( frame_properties, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
 440         }
 441
 442         // Return the frame
 443         return frame;
 444 }
 445
 446 static inline long time_difference( struct timeval *time1 )
 447 {
 448         struct timeval time2;
 449         time2.tv_sec = time1->tv_sec;
 450         time2.tv_usec = time1->tv_usec;
 451         gettimeofday( time1, NULL );
 452         return time1->tv_sec * 1000000 + time1->tv_usec - time2.tv_sec * 1000000 - time2.tv_usec;
 453 }
 454
 455 static void *consumer_read_ahead_thread( void *arg )
 456 {
 457         // The argument is the consumer
 458         mlt_consumer this = arg;
 459
 460         // Get the properties of the consumer
 461         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 462
 463         // Get the width and height
 464         int width = mlt_properties_get_int( properties, "width" );
 465         int height = mlt_properties_get_int( properties, "height" );
 466
 467         // See if video is turned off
 468         int video_off = mlt_properties_get_int( properties, "video_off" );
 469         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 470         int preview_format = mlt_properties_get_int( properties, "preview_format" );
 471
 472         // Get the audio settings
 473         mlt_audio_format afmt = mlt_audio_pcm;
 474         int counter = 0;
 475         double fps = mlt_properties_get_double( properties, "fps" );
 476         int channels = mlt_properties_get_int( properties, "channels" );
 477         int frequency = mlt_properties_get_int( properties, "frequency" );
 478         int samples = 0;
 479         int16_t *pcm = NULL;
 480
 481         // See if audio is turned off
 482         int audio_off = mlt_properties_get_int( properties, "audio_off" );
 483
 484         // Get the maximum size of the buffer
 485         int buffer = mlt_properties_get_int( properties, "buffer" ) + 1;
 486
 487         // General frame variable
 488         mlt_frame frame = NULL;
 489         uint8_t *image = NULL;
 490
 491         // Time structures
 492         struct timeval ante;
 493
 494         // Average time for get_frame and get_image
 495         int count = 1;
 496         int skipped = 0;
 497         int64_t time_wait = 0;
 498         int64_t time_frame = 0;
 499         int64_t time_process = 0;
 500         int skip_next = 0;
 501         mlt_service lock_object = NULL;
 502
 503         if ( preview_off && preview_format != 0 )
 504                 this->format = preview_format;
 505
 506         // Get the first frame
 507         frame = mlt_consumer_get_frame( this );
 508
 509         // Get the lock object
 510         lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 511
 512         // Lock it
 513         if ( lock_object ) mlt_service_lock( lock_object );
 514
 515         // Get the image of the first frame
 516         if ( !video_off )
 517         {
 518                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 519                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 520         }
 521
 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         // Unlock the lock object
 529         if ( lock_object ) mlt_service_unlock( lock_object );
 530
 531         // Mark as rendered
 532         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 533
 534         // Get the starting time (can ignore the times above)
 535         gettimeofday( &ante, NULL );
 536
 537         // Continue to read ahead
 538         while ( this->ahead )
 539         {
 540                 // Fetch width/height again
 541                 width = mlt_properties_get_int( properties, "width" );
 542                 height = mlt_properties_get_int( properties, "height" );
 543
 544                 // Put the current frame into the queue
 545                 pthread_mutex_lock( &this->mutex );
 546                 while( this->ahead && mlt_deque_count( this->queue ) >= buffer )
 547                         pthread_cond_wait( &this->cond, &this->mutex );
 548                 mlt_deque_push_back( this->queue, frame );
 549                 pthread_cond_broadcast( &this->cond );
 550                 pthread_mutex_unlock( &this->mutex );
 551
 552                 time_wait += time_difference( &ante );
 553
 554                 // Get the next frame
 555                 frame = mlt_consumer_get_frame( this );
 556                 time_frame += time_difference( &ante );
 557
 558                 // If there's no frame, we're probably stopped...
 559                 if ( frame == NULL )
 560                         continue;
 561
 562                 // Attempt to fetch the lock object
 563                 lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 564
 565                 // Increment the count
 566                 count ++;
 567
 568                 // Lock if there's a lock object
 569                 if ( lock_object ) mlt_service_lock( lock_object );
 570
 571                 // All non normal playback frames should be shown
 572                 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "_speed" ) != 1 )
 573                 {
 574                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "consumer_deinterlace", 1 );
 575                         skipped = 0;
 576                         time_frame = 0;
 577                         time_process = 0;
 578                         time_wait = 0;
 579                         count = 1;
 580                         skip_next = 0;
 581                 }
 582
 583                 // Get the image
 584                 if ( !skip_next )
 585                 {
 586                         // Get the image, mark as rendered and time it
 587                         if ( !video_off )
 588                         {
 589                                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 590                                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 591                         }
 592                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 593                 }
 594                 else
 595                 {
 596                         // Increment the number of sequentially skipped frames
 597                         skipped ++;
 598                         skip_next = 0;
 599
 600                         // If we've reached an unacceptable level, reset everything
 601                         if ( skipped > 5 )
 602                         {
 603                                 skipped = 0;
 604                                 time_frame = 0;
 605                                 time_process = 0;
 606                                 time_wait = 0;
 607                                 count = 1;
 608                         }
 609                 }
 610
 611                 // Always process audio
 612                 if ( !audio_off )
 613                 {
 614                         samples = mlt_sample_calculator( fps, frequency, counter++ );
 615                         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 616                 }
 617
 618                 // Increment the time take for this frame
 619                 time_process += time_difference( &ante );
 620
 621                 // Determine if the next frame should be skipped
 622                 if ( mlt_deque_count( this->queue ) <= 5 && ( ( time_wait + time_frame + time_process ) / count ) > 40000 )
 623                         skip_next = 1;
 624
 625                 // Unlock if there's a lock object
 626                 if ( lock_object ) mlt_service_unlock( lock_object );
 627         }
 628
 629         // Remove the last frame
 630         mlt_frame_close( frame );
 631
 632         return NULL;
 633 }
 634
 635 static void consumer_read_ahead_start( mlt_consumer this )
 636 {
 637         // We're running now
 638         this->ahead = 1;
 639
 640         // Create the frame queue
 641         this->queue = mlt_deque_init( );
 642
 643         // Create the mutex
 644         pthread_mutex_init( &this->mutex, NULL );
 645
 646         // Create the condition
 647         pthread_cond_init( &this->cond, NULL );
 648
 649         // Create the read ahead
 650         pthread_create( &this->ahead_thread, NULL, consumer_read_ahead_thread, this );
 651 }
 652
 653 static void consumer_read_ahead_stop( mlt_consumer this )
 654 {
 655         // Make sure we're running
 656         if ( this->ahead )
 657         {
 658                 // Inform thread to stop
 659                 this->ahead = 0;
 660
 661                 // Broadcast to the condition in case it's waiting
 662                 pthread_mutex_lock( &this->mutex );
 663                 pthread_cond_broadcast( &this->cond );
 664                 pthread_mutex_unlock( &this->mutex );
 665
 666                 // Broadcast to the put condition in case it's waiting
 667                 pthread_mutex_lock( &this->put_mutex );
 668                 pthread_cond_broadcast( &this->put_cond );
 669                 pthread_mutex_unlock( &this->put_mutex );
 670
 671                 // Join the thread
 672                 pthread_join( this->ahead_thread, NULL );
 673
 674                 // Destroy the mutex
 675                 pthread_mutex_destroy( &this->mutex );
 676
 677                 // Destroy the condition
 678                 pthread_cond_destroy( &this->cond );
 679
 680                 // Wipe the queue
 681                 while ( mlt_deque_count( this->queue ) )
 682                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 683
 684                 // Close the queue
 685                 mlt_deque_close( this->queue );
 686         }
 687 }
 688
 689 void mlt_consumer_purge( mlt_consumer this )
 690 {
 691         if ( this->ahead )
 692         {
 693                 pthread_mutex_lock( &this->mutex );
 694                 while ( mlt_deque_count( this->queue ) )
 695                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 696                 pthread_cond_broadcast( &this->cond );
 697                 pthread_mutex_unlock( &this->mutex );
 698         }
 699 }
 700
 701 mlt_frame mlt_consumer_rt_frame( mlt_consumer this )
 702 {
 703         // Frame to return
 704         mlt_frame frame = NULL;
 705
 706         // Get the properties
 707         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 708
 709         // Check if the user has requested real time or not
 710         if ( this->real_time )
 711         {
 712                 int size = 1;
 713
 714                 // Is the read ahead running?
 715                 if ( this->ahead == 0 )
 716                 {
 717                         int buffer = mlt_properties_get_int( properties, "buffer" );
 718                         int prefill = mlt_properties_get_int( properties, "prefill" );
 719                         consumer_read_ahead_start( this );
 720                         if ( buffer > 1 )
 721                                 size = prefill > 0 && prefill < buffer ? prefill : buffer;
 722                 }
 723
 724                 // Get frame from queue
 725                 pthread_mutex_lock( &this->mutex );
 726                 while( this->ahead && mlt_deque_count( this->queue ) < size )
 727                         pthread_cond_wait( &this->cond, &this->mutex );
 728                 frame = mlt_deque_pop_front( this->queue );
 729                 pthread_cond_broadcast( &this->cond );
 730                 pthread_mutex_unlock( &this->mutex );
 731         }
 732         else
 733         {
 734                 // Get the frame in non real time
 735                 frame = mlt_consumer_get_frame( this );
 736
 737                 // This isn't true, but from the consumers perspective it is
 738                 if ( frame != NULL )
 739                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 740         }
 741
 742         return frame;
 743 }
 744
 745 /** Callback for the implementation to indicate a stopped condition.
 746 */
 747
 748 void mlt_consumer_stopped( mlt_consumer this )
 749 {
 750         mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( this ), "running", 0 );
 751         mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-stopped", NULL );
 752         mlt_event_unblock( this->event_listener );
 753 }
 754
 755 /** Stop the consumer.
 756 */
 757
 758 int mlt_consumer_stop( mlt_consumer this )
 759 {
 760         // Get the properies
 761         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 762         char *debug = mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "debug" );
 763
 764         // Just in case...
 765         if ( debug ) fprintf( stderr, "%s: stopping put waiting\n", debug );
 766         pthread_mutex_lock( &this->put_mutex );
 767         this->put_active = 0;
 768         pthread_cond_broadcast( &this->put_cond );
 769         pthread_mutex_unlock( &this->put_mutex );
 770
 771         // Stop the consumer
 772         if ( debug ) fprintf( stderr, "%s: stopping consumer\n", debug );
 773         if ( this->stop != NULL )
 774                 this->stop( this );
 775
 776         // Check if the user has requested real time or not and stop if necessary
 777         if ( debug ) fprintf( stderr, "%s: stopping read_ahead\n", debug );
 778         if ( mlt_properties_get_int( properties, "real_time" ) )
 779                 consumer_read_ahead_stop( this );
 780
 781         // Kill the test card
 782         mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 783
 784         // Check and run a post command
 785         if ( mlt_properties_get( properties, "post" ) )
 786                 system( mlt_properties_get( properties, "post" ) );
 787
 788         if ( debug ) fprintf( stderr, "%s: stopped\n", debug );
 789
 790         return 0;
 791 }
 792
 793 /** Determine if the consumer is stopped.
 794 */
 795
 796 int mlt_consumer_is_stopped( mlt_consumer this )
 797 {
 798         // Check if the consumer is stopped
 799         if ( this->is_stopped != NULL )
 800                 return this->is_stopped( this );
 801
 802         return 0;
 803 }
 804
 805 /** Close the consumer.
 806 */
 807
 808 void mlt_consumer_close( mlt_consumer this )
 809 {
 810         if ( this != NULL && mlt_properties_dec_ref( MLT_CONSUMER_PROPERTIES( this ) ) <= 0 )
 811         {
 812                 // Get the childs close function
 813                 void ( *consumer_close )( ) = this->close;
 814
 815                 if ( consumer_close )
 816                 {
 817                         // Just in case...
 818                         //mlt_consumer_stop( this );
 819
 820                         this->close = NULL;
 821                         consumer_close( this );
 822                 }
 823                 else
 824                 {
 825                         // Make sure it only gets called once
 826                         this->parent.close = NULL;
 827
 828                         // Destroy the push mutex and condition
 829                         pthread_mutex_destroy( &this->put_mutex );
 830                         pthread_cond_destroy( &this->put_cond );
 831
 832                         mlt_service_close( &this->parent );
 833                 }
 834         }
 835 }