git.sesse.net Git - mlt/blob - src/framework/mlt_consumer.c

   1 /**
   2  * \file mlt_consumer.c
   3  * \brief abstraction for all consumer services
   4  *
   5  * Copyright (C) 2003-2008 Ushodaya Enterprises Limited
   6  * \author Charles Yates <charles.yates@pandora.be>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include "mlt_consumer.h"
  24 #include "mlt_factory.h"
  25 #include "mlt_producer.h"
  26 #include "mlt_frame.h"
  27 #include "mlt_profile.h"
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <sys/time.h>
  33
  34 #undef DEINTERLACE_ON_NOT_NORMAL_SPEED
  35
  36 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  37 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  38 static void mlt_consumer_property_changed( mlt_service owner, mlt_consumer this, char *name );
  39 static void apply_profile_properties( mlt_consumer this, mlt_profile profile, mlt_properties properties );
  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         // Set the frame duration in microseconds for the frame-dropping heuristic
 327         int frame_duration = 1000000 / mlt_properties_get_int( properties, "frame_rate_num" ) *
 328                         mlt_properties_get_int( properties, "frame_rate_den" );
 329         mlt_properties_set_int( properties, "frame_duration", frame_duration );
 330
 331         // Check and run an ante command
 332         if ( mlt_properties_get( properties, "ante" ) )
 333                 system( mlt_properties_get( properties, "ante" ) );
 334
 335         // Set the real_time preference
 336         this->real_time = mlt_properties_get_int( properties, "real_time" );
 337
 338         // Start the service
 339         if ( this->start != NULL )
 340                 return this->start( this );
 341
 342         return 0;
 343 }
 344
 345 /** An alternative method to feed frames into the consumer - only valid if
 346         the consumer itself is not connected.
 347 */
 348
 349 int mlt_consumer_put_frame( mlt_consumer this, mlt_frame frame )
 350 {
 351         int error = 1;
 352
 353         // Get the service assoicated to the consumer
 354         mlt_service service = MLT_CONSUMER_SERVICE( this );
 355
 356         if ( mlt_service_producer( service ) == NULL )
 357         {
 358                 struct timeval now;
 359                 struct timespec tm;
 360                 pthread_mutex_lock( &this->put_mutex );
 361                 while ( this->put_active && this->put != NULL )
 362                 {
 363                         gettimeofday( &now, NULL );
 364                         tm.tv_sec = now.tv_sec + 1;
 365                         tm.tv_nsec = now.tv_usec * 1000;
 366                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 367                 }
 368                 if ( this->put_active && this->put == NULL )
 369                         this->put = frame;
 370                 else
 371                         mlt_frame_close( frame );
 372                 pthread_cond_broadcast( &this->put_cond );
 373                 pthread_mutex_unlock( &this->put_mutex );
 374         }
 375         else
 376         {
 377                 mlt_frame_close( frame );
 378         }
 379
 380         return error;
 381 }
 382
 383 /** Protected method for consumer to get frames from connected service
 384 */
 385
 386 mlt_frame mlt_consumer_get_frame( mlt_consumer this )
 387 {
 388         // Frame to return
 389         mlt_frame frame = NULL;
 390
 391         // Get the service assoicated to the consumer
 392         mlt_service service = MLT_CONSUMER_SERVICE( this );
 393
 394         // Get the consumer properties
 395         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 396
 397         // Get the frame
 398         if ( mlt_service_producer( service ) == NULL && mlt_properties_get_int( properties, "put_mode" ) )
 399         {
 400                 struct timeval now;
 401                 struct timespec tm;
 402                 pthread_mutex_lock( &this->put_mutex );
 403                 while ( this->put_active && this->put == NULL )
 404                 {
 405                         gettimeofday( &now, NULL );
 406                         tm.tv_sec = now.tv_sec + 1;
 407                         tm.tv_nsec = now.tv_usec * 1000;
 408                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 409                 }
 410                 frame = this->put;
 411                 this->put = NULL;
 412                 pthread_cond_broadcast( &this->put_cond );
 413                 pthread_mutex_unlock( &this->put_mutex );
 414                 if ( frame != NULL )
 415                         mlt_service_apply_filters( service, frame, 0 );
 416         }
 417         else if ( mlt_service_producer( service ) != NULL )
 418         {
 419                 mlt_service_get_frame( service, &frame, 0 );
 420         }
 421         else
 422         {
 423                 frame = mlt_frame_init( service );
 424         }
 425
 426         if ( frame != NULL )
 427         {
 428                 // Get the frame properties
 429                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
 430
 431                 // Get the test card producer
 432                 mlt_producer test_card = mlt_properties_get_data( properties, "test_card_producer", NULL );
 433
 434                 // Attach the test frame producer to it.
 435                 if ( test_card != NULL )
 436                         mlt_properties_set_data( frame_properties, "test_card_producer", test_card, 0, NULL, NULL );
 437
 438                 // Attach the rescale property
 439                 mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale" ) );
 440
 441                 // Aspect ratio and other jiggery pokery
 442                 mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
 443                 mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" ) );
 444                 mlt_properties_set( frame_properties, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
 445         }
 446
 447         // Return the frame
 448         return frame;
 449 }
 450
 451 static inline long time_difference( struct timeval *time1 )
 452 {
 453         struct timeval time2;
 454         time2.tv_sec = time1->tv_sec;
 455         time2.tv_usec = time1->tv_usec;
 456         gettimeofday( time1, NULL );
 457         return time1->tv_sec * 1000000 + time1->tv_usec - time2.tv_sec * 1000000 - time2.tv_usec;
 458 }
 459
 460 static void *consumer_read_ahead_thread( void *arg )
 461 {
 462         // The argument is the consumer
 463         mlt_consumer this = arg;
 464
 465         // Get the properties of the consumer
 466         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 467
 468         // Get the width and height
 469         int width = mlt_properties_get_int( properties, "width" );
 470         int height = mlt_properties_get_int( properties, "height" );
 471
 472         // See if video is turned off
 473         int video_off = mlt_properties_get_int( properties, "video_off" );
 474         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 475         int preview_format = mlt_properties_get_int( properties, "preview_format" );
 476
 477         // Get the audio settings
 478         mlt_audio_format afmt = mlt_audio_pcm;
 479         int counter = 0;
 480         double fps = mlt_properties_get_double( properties, "fps" );
 481         int channels = mlt_properties_get_int( properties, "channels" );
 482         int frequency = mlt_properties_get_int( properties, "frequency" );
 483         int samples = 0;
 484         int16_t *pcm = NULL;
 485
 486         // See if audio is turned off
 487         int audio_off = mlt_properties_get_int( properties, "audio_off" );
 488
 489         // Get the maximum size of the buffer
 490         int buffer = mlt_properties_get_int( properties, "buffer" ) + 1;
 491
 492         // General frame variable
 493         mlt_frame frame = NULL;
 494         uint8_t *image = NULL;
 495
 496         // Time structures
 497         struct timeval ante;
 498
 499         // Average time for get_frame and get_image
 500         int count = 1;
 501         int skipped = 0;
 502         int64_t time_wait = 0;
 503         int64_t time_frame = 0;
 504         int64_t time_process = 0;
 505         int skip_next = 0;
 506         mlt_service lock_object = NULL;
 507
 508         if ( preview_off && preview_format != 0 )
 509                 this->format = preview_format;
 510
 511         // Get the first frame
 512         frame = mlt_consumer_get_frame( this );
 513
 514         // Get the lock object
 515         lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 516
 517         // Lock it
 518         if ( lock_object ) mlt_service_lock( lock_object );
 519
 520         // Get the image of the first frame
 521         if ( !video_off )
 522         {
 523                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 524                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 525         }
 526
 527         if ( !audio_off )
 528         {
 529                 samples = mlt_sample_calculator( fps, frequency, counter++ );
 530                 mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 531         }
 532
 533         // Unlock the lock object
 534         if ( lock_object ) mlt_service_unlock( lock_object );
 535
 536         // Mark as rendered
 537         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 538
 539         // Get the starting time (can ignore the times above)
 540         gettimeofday( &ante, NULL );
 541
 542         // Continue to read ahead
 543         while ( this->ahead )
 544         {
 545                 // Fetch width/height again
 546                 width = mlt_properties_get_int( properties, "width" );
 547                 height = mlt_properties_get_int( properties, "height" );
 548
 549                 // Put the current frame into the queue
 550                 pthread_mutex_lock( &this->mutex );
 551                 while( this->ahead && mlt_deque_count( this->queue ) >= buffer )
 552                         pthread_cond_wait( &this->cond, &this->mutex );
 553                 mlt_deque_push_back( this->queue, frame );
 554                 pthread_cond_broadcast( &this->cond );
 555                 pthread_mutex_unlock( &this->mutex );
 556
 557                 time_wait += time_difference( &ante );
 558
 559                 // Get the next frame
 560                 frame = mlt_consumer_get_frame( this );
 561                 time_frame += time_difference( &ante );
 562
 563                 // If there's no frame, we're probably stopped...
 564                 if ( frame == NULL )
 565                         continue;
 566
 567                 // Attempt to fetch the lock object
 568                 lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 569
 570                 // Increment the count
 571                 count ++;
 572
 573                 // Lock if there's a lock object
 574                 if ( lock_object ) mlt_service_lock( lock_object );
 575
 576                 // All non normal playback frames should be shown
 577                 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "_speed" ) != 1 )
 578                 {
 579 #ifdef DEINTERLACE_ON_NOT_NORMAL_SPEED
 580                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "consumer_deinterlace", 1 );
 581 #endif
 582                         skipped = 0;
 583                         time_frame = 0;
 584                         time_process = 0;
 585                         time_wait = 0;
 586                         count = 1;
 587                         skip_next = 0;
 588                 }
 589
 590                 // Get the image
 591                 if ( !skip_next || this->real_time == -1 )
 592                 {
 593                         // Get the image, mark as rendered and time it
 594                         if ( !video_off )
 595                         {
 596                                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 597                                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 598                         }
 599                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 600                 }
 601                 else
 602                 {
 603                         // Increment the number of sequentially skipped frames
 604                         skipped ++;
 605                         skip_next = 0;
 606
 607                         // If we've reached an unacceptable level, reset everything
 608                         if ( skipped > 5 )
 609                         {
 610                                 skipped = 0;
 611                                 time_frame = 0;
 612                                 time_process = 0;
 613                                 time_wait = 0;
 614                                 count = 1;
 615                         }
 616                 }
 617
 618                 // Always process audio
 619                 if ( !audio_off )
 620                 {
 621                         samples = mlt_sample_calculator( fps, frequency, counter++ );
 622                         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 623                 }
 624
 625                 // Increment the time take for this frame
 626                 time_process += time_difference( &ante );
 627
 628                 // Determine if the next frame should be skipped
 629                 if ( mlt_deque_count( this->queue ) <= 5 )
 630                 {
 631                         int frame_duration = mlt_properties_get_int( properties, "frame_duration" );
 632                         if ( ( ( time_wait + time_frame + time_process ) / count ) > frame_duration )
 633                                 skip_next = 1;
 634                 }
 635
 636                 // Unlock if there's a lock object
 637                 if ( lock_object ) mlt_service_unlock( lock_object );
 638         }
 639
 640         // Remove the last frame
 641         mlt_frame_close( frame );
 642
 643         return NULL;
 644 }
 645
 646 static void consumer_read_ahead_start( mlt_consumer this )
 647 {
 648         // We're running now
 649         this->ahead = 1;
 650
 651         // Create the frame queue
 652         this->queue = mlt_deque_init( );
 653
 654         // Create the mutex
 655         pthread_mutex_init( &this->mutex, NULL );
 656
 657         // Create the condition
 658         pthread_cond_init( &this->cond, NULL );
 659
 660         // Create the read ahead
 661         if ( mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "priority" ) )
 662         {
 663                 struct sched_param priority;
 664                 priority.sched_priority = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( this ), "priority" );
 665                 pthread_attr_t thread_attributes;
 666                 pthread_attr_init( &thread_attributes );
 667                 pthread_attr_setschedpolicy( &thread_attributes, SCHED_OTHER );
 668                 pthread_attr_setschedparam( &thread_attributes, &priority );
 669                 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_EXPLICIT_SCHED );
 670                 pthread_attr_setscope( &thread_attributes, PTHREAD_SCOPE_SYSTEM );
 671                 if ( pthread_create( &this->ahead_thread, &thread_attributes, consumer_read_ahead_thread, this ) < 0 )
 672                         pthread_create( &this->ahead_thread, NULL, consumer_read_ahead_thread, this );
 673                 pthread_attr_destroy( &thread_attributes );
 674         }
 675         else
 676         {
 677                 pthread_create( &this->ahead_thread, NULL, consumer_read_ahead_thread, this );
 678         }
 679 }
 680
 681 static void consumer_read_ahead_stop( mlt_consumer this )
 682 {
 683         // Make sure we're running
 684         if ( this->ahead )
 685         {
 686                 // Inform thread to stop
 687                 this->ahead = 0;
 688
 689                 // Broadcast to the condition in case it's waiting
 690                 pthread_mutex_lock( &this->mutex );
 691                 pthread_cond_broadcast( &this->cond );
 692                 pthread_mutex_unlock( &this->mutex );
 693
 694                 // Broadcast to the put condition in case it's waiting
 695                 pthread_mutex_lock( &this->put_mutex );
 696                 pthread_cond_broadcast( &this->put_cond );
 697                 pthread_mutex_unlock( &this->put_mutex );
 698
 699                 // Join the thread
 700                 pthread_join( this->ahead_thread, NULL );
 701
 702                 // Destroy the mutex
 703                 pthread_mutex_destroy( &this->mutex );
 704
 705                 // Destroy the condition
 706                 pthread_cond_destroy( &this->cond );
 707
 708                 // Wipe the queue
 709                 while ( mlt_deque_count( this->queue ) )
 710                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 711
 712                 // Close the queue
 713                 mlt_deque_close( this->queue );
 714         }
 715 }
 716
 717 void mlt_consumer_purge( mlt_consumer this )
 718 {
 719         if ( this->ahead )
 720         {
 721                 pthread_mutex_lock( &this->mutex );
 722                 while ( mlt_deque_count( this->queue ) )
 723                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 724                 pthread_cond_broadcast( &this->cond );
 725                 pthread_mutex_unlock( &this->mutex );
 726         }
 727 }
 728
 729 mlt_frame mlt_consumer_rt_frame( mlt_consumer this )
 730 {
 731         // Frame to return
 732         mlt_frame frame = NULL;
 733
 734         // Get the properties
 735         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 736
 737         // Check if the user has requested real time or not
 738         if ( this->real_time )
 739         {
 740                 int size = 1;
 741
 742                 // Is the read ahead running?
 743                 if ( this->ahead == 0 )
 744                 {
 745                         int buffer = mlt_properties_get_int( properties, "buffer" );
 746                         int prefill = mlt_properties_get_int( properties, "prefill" );
 747                         consumer_read_ahead_start( this );
 748                         if ( buffer > 1 )
 749                                 size = prefill > 0 && prefill < buffer ? prefill : buffer;
 750                 }
 751
 752                 // Get frame from queue
 753                 pthread_mutex_lock( &this->mutex );
 754                 while( this->ahead && mlt_deque_count( this->queue ) < size )
 755                         pthread_cond_wait( &this->cond, &this->mutex );
 756                 frame = mlt_deque_pop_front( this->queue );
 757                 pthread_cond_broadcast( &this->cond );
 758                 pthread_mutex_unlock( &this->mutex );
 759         }
 760         else
 761         {
 762                 // Get the frame in non real time
 763                 frame = mlt_consumer_get_frame( this );
 764
 765                 // This isn't true, but from the consumers perspective it is
 766                 if ( frame != NULL )
 767                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 768         }
 769
 770         return frame;
 771 }
 772
 773 /** Callback for the implementation to indicate a stopped condition.
 774 */
 775
 776 void mlt_consumer_stopped( mlt_consumer this )
 777 {
 778         mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( this ), "running", 0 );
 779         mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-stopped", NULL );
 780         mlt_event_unblock( this->event_listener );
 781 }
 782
 783 /** Stop the consumer.
 784 */
 785
 786 int mlt_consumer_stop( mlt_consumer this )
 787 {
 788         // Get the properies
 789         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 790         char *debug = mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "debug" );
 791
 792         // Just in case...
 793         if ( debug ) fprintf( stderr, "%s: stopping put waiting\n", debug );
 794         pthread_mutex_lock( &this->put_mutex );
 795         this->put_active = 0;
 796         pthread_cond_broadcast( &this->put_cond );
 797         pthread_mutex_unlock( &this->put_mutex );
 798
 799         // Stop the consumer
 800         if ( debug ) fprintf( stderr, "%s: stopping consumer\n", debug );
 801         if ( this->stop != NULL )
 802                 this->stop( this );
 803
 804         // Check if the user has requested real time or not and stop if necessary
 805         if ( debug ) fprintf( stderr, "%s: stopping read_ahead\n", debug );
 806         if ( mlt_properties_get_int( properties, "real_time" ) )
 807                 consumer_read_ahead_stop( this );
 808
 809         // Kill the test card
 810         mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 811
 812         // Check and run a post command
 813         if ( mlt_properties_get( properties, "post" ) )
 814                 system( mlt_properties_get( properties, "post" ) );
 815
 816         if ( debug ) fprintf( stderr, "%s: stopped\n", debug );
 817
 818         return 0;
 819 }
 820
 821 /** Determine if the consumer is stopped.
 822 */
 823
 824 int mlt_consumer_is_stopped( mlt_consumer this )
 825 {
 826         // Check if the consumer is stopped
 827         if ( this->is_stopped != NULL )
 828                 return this->is_stopped( this );
 829
 830         return 0;
 831 }
 832
 833 /** Close the consumer.
 834 */
 835
 836 void mlt_consumer_close( mlt_consumer this )
 837 {
 838         if ( this != NULL && mlt_properties_dec_ref( MLT_CONSUMER_PROPERTIES( this ) ) <= 0 )
 839         {
 840                 // Get the childs close function
 841                 void ( *consumer_close )( ) = this->close;
 842
 843                 if ( consumer_close )
 844                 {
 845                         // Just in case...
 846                         //mlt_consumer_stop( this );
 847
 848                         this->close = NULL;
 849                         consumer_close( this );
 850                 }
 851                 else
 852                 {
 853                         // Make sure it only gets called once
 854                         this->parent.close = NULL;
 855
 856                         // Destroy the push mutex and condition
 857                         pthread_mutex_destroy( &this->put_mutex );
 858                         pthread_cond_destroy( &this->put_cond );
 859
 860                         mlt_service_close( &this->parent );
 861                 }
 862         }
 863 }