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 <stdio.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include <sys/time.h>
  30
  31 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  32 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  33
  34 /** Public final methods
  35 */
  36
  37 int mlt_consumer_init( mlt_consumer this, void *child )
  38 {
  39         int error = 0;
  40         memset( this, 0, sizeof( struct mlt_consumer_s ) );
  41         this->child = child;
  42         error = mlt_service_init( &this->parent, this );
  43         if ( error == 0 )
  44         {
  45                 // Get the properties from the service
  46                 mlt_properties properties = MLT_SERVICE_PROPERTIES( &this->parent );
  47
  48                 // Get the normalisation preference
  49                 char *normalisation = mlt_environment( "MLT_NORMALISATION" );
  50
  51                 // Deal with normalisation
  52                 if ( normalisation == NULL || strcmp( normalisation, "NTSC" ) )
  53                 {
  54                         mlt_properties_set( properties, "normalisation", "PAL" );
  55                         mlt_properties_set_double( properties, "fps", 25.0 );
  56                         mlt_properties_set_int( properties, "frame_rate_num", 25 );
  57                         mlt_properties_set_int( properties, "frame_rate_den", 1 );
  58                         mlt_properties_set_int( properties, "width", 720 );
  59                         mlt_properties_set_int( properties, "height", 576 );
  60                         mlt_properties_set_int( properties, "progressive", 0 );
  61                         mlt_properties_set_double( properties, "aspect_ratio", 59.0 / 54.0 );
  62                         mlt_properties_set_int( properties, "aspect_ratio_num", 59 );
  63                         mlt_properties_set_int( properties, "aspect_ratio_den", 54 );
  64                         mlt_properties_set_double( properties, "display_ratio", 4.0 / 3.0 );
  65                         mlt_properties_set_int( properties, "display_ratio_num", 4 );
  66                         mlt_properties_set_int( properties, "display_ratio_den", 3 );
  67                 }
  68                 else
  69                 {
  70                         mlt_properties_set( properties, "normalisation", "NTSC" );
  71                         mlt_properties_set_double( properties, "fps", 30000.0 / 1001.0 );
  72                         mlt_properties_set_int( properties, "frame_rate_num", 30000 );
  73                         mlt_properties_set_int( properties, "frame_rate_den", 1001 );
  74                         mlt_properties_set_int( properties, "width", 720 );
  75                         mlt_properties_set_int( properties, "height", 480 );
  76                         mlt_properties_set_int( properties, "progressive", 0 );
  77                         mlt_properties_set_double( properties, "aspect_ratio", 10.0 / 11.0 );
  78                         mlt_properties_set_int( properties, "aspect_ratio_num", 10 );
  79                         mlt_properties_set_int( properties, "aspect_ratio_den", 11 );
  80                         mlt_properties_set_double( properties, "display_ratio", 4.0 / 3.0 );
  81                         mlt_properties_set_int( properties, "display_ratio_num", 4 );
  82                         mlt_properties_set_int( properties, "display_ratio_den", 3 );
  83                 }
  84
  85                 // Default rescaler for all consumers
  86                 mlt_properties_set( properties, "rescale", "bilinear" );
  87
  88                 // Default read ahead buffer size
  89                 mlt_properties_set_int( properties, "buffer", 25 );
  90
  91                 // Default audio frequency and channels
  92                 mlt_properties_set_int( properties, "frequency", 48000 );
  93                 mlt_properties_set_int( properties, "channels", 2 );
  94
  95                 // Default of all consumers is real time
  96                 mlt_properties_set_int( properties, "real_time", 1 );
  97
  98                 // Default to environment test card
  99                 mlt_properties_set( properties, "test_card", mlt_environment( "MLT_TEST_CARD" ) );
 100
 101                 // Hmm - default all consumers to yuv422 :-/
 102                 this->format = mlt_image_yuv422;
 103
 104                 mlt_events_register( properties, "consumer-frame-show", ( mlt_transmitter )mlt_consumer_frame_show );
 105                 mlt_events_register( properties, "consumer-frame-render", ( mlt_transmitter )mlt_consumer_frame_render );
 106                 mlt_events_register( properties, "consumer-stopped", NULL );
 107
 108                 // Create the push mutex and condition
 109                 pthread_mutex_init( &this->put_mutex, NULL );
 110                 pthread_cond_init( &this->put_cond, NULL );
 111
 112         }
 113         return error;
 114 }
 115
 116 static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 117 {
 118         if ( listener != NULL )
 119                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 120 }
 121
 122 static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 123 {
 124         if ( listener != NULL )
 125                 listener( owner, this, ( mlt_frame )args[ 0 ] );
 126 }
 127
 128 /** Create a new consumer.
 129 */
 130
 131 mlt_consumer mlt_consumer_new( )
 132 {
 133         // Create the memory for the structure
 134         mlt_consumer this = malloc( sizeof( struct mlt_consumer_s ) );
 135
 136         // Initialise it
 137         if ( this != NULL )
 138                 mlt_consumer_init( this, NULL );
 139
 140         // Return it
 141         return this;
 142 }
 143
 144 /** Get the parent service object.
 145 */
 146
 147 mlt_service mlt_consumer_service( mlt_consumer this )
 148 {
 149         return this != NULL ? &this->parent : NULL;
 150 }
 151
 152 /** Get the consumer properties.
 153 */
 154
 155 mlt_properties mlt_consumer_properties( mlt_consumer this )
 156 {
 157         return this != NULL ? MLT_SERVICE_PROPERTIES( &this->parent ) : NULL;
 158 }
 159
 160 /** Connect the consumer to the producer.
 161 */
 162
 163 int mlt_consumer_connect( mlt_consumer this, mlt_service producer )
 164 {
 165         return mlt_service_connect_producer( &this->parent, producer, 0 );
 166 }
 167
 168 /** Start the consumer.
 169 */
 170
 171 int mlt_consumer_start( mlt_consumer this )
 172 {
 173         // Get the properies
 174         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 175
 176         // Determine if there's a test card producer
 177         char *test_card = mlt_properties_get( properties, "test_card" );
 178
 179         // Handle profiles
 180         char *profile = mlt_properties_get( properties, "profile" );
 181         int profile_ok = mlt_consumer_profile( properties, profile );
 182
 183         // Check that everything is OK
 184         if ( !profile_ok )
 185                 fprintf( stderr, "Unrecognised profile %s - continuing with defaults.\n", mlt_properties_get( properties, "profile" ) );
 186         else if ( profile_ok < 0 )
 187                 fprintf( stderr, "Recognised profile %s with warnings - trying to continue with some defaults.\n", mlt_properties_get( properties, "profile" ) );
 188
 189         // Just to make sure nothing is hanging around...
 190         mlt_frame_close( this->put );
 191         this->put = NULL;
 192         this->put_active = 1;
 193
 194         // Deal with it now.
 195         if ( test_card != NULL )
 196         {
 197                 if ( mlt_properties_get_data( properties, "test_card_producer", NULL ) == NULL )
 198                 {
 199                         // Create a test card producer
 200                         mlt_producer producer = mlt_factory_producer( NULL, test_card );
 201
 202                         // Do we have a producer
 203                         if ( producer != NULL )
 204                         {
 205                                 // Test card should loop I guess...
 206                                 mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
 207                                 //mlt_producer_set_speed( producer, 0 );
 208                                 //mlt_producer_set_in_and_out( producer, 0, 0 );
 209
 210                                 // Set the test card on the consumer
 211                                 mlt_properties_set_data( properties, "test_card_producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
 212                         }
 213                 }
 214         }
 215         else
 216         {
 217                 // Allow the hash table to speed things up
 218                 mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 219         }
 220
 221         // Check and run an ante command
 222         if ( mlt_properties_get( properties, "ante" ) )
 223                 system( mlt_properties_get( properties, "ante" ) );
 224
 225         // Set the real_time preference
 226         this->real_time = mlt_properties_get_int( properties, "real_time" );
 227
 228         // Start the service
 229         if ( this->start != NULL )
 230                 return this->start( this );
 231
 232         return 0;
 233 }
 234
 235 /** An alternative method to feed frames into the consumer - only valid if
 236         the consumer itself is not connected.
 237 */
 238
 239 int mlt_consumer_put_frame( mlt_consumer this, mlt_frame frame )
 240 {
 241         int error = 1;
 242
 243         // Get the service assoicated to the consumer
 244         mlt_service service = MLT_CONSUMER_SERVICE( this );
 245
 246         if ( mlt_service_producer( service ) == NULL )
 247         {
 248                 struct timeval now;
 249                 struct timespec tm;
 250                 pthread_mutex_lock( &this->put_mutex );
 251                 while ( this->put_active && this->put != NULL )
 252                 {
 253                         gettimeofday( &now, NULL );
 254                         tm.tv_sec = now.tv_sec + 1;
 255                         tm.tv_nsec = now.tv_usec * 1000;
 256                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 257                 }
 258                 if ( this->put_active && this->put == NULL )
 259                         this->put = frame;
 260                 else
 261                         mlt_frame_close( frame );
 262                 pthread_cond_broadcast( &this->put_cond );
 263                 pthread_mutex_unlock( &this->put_mutex );
 264         }
 265         else
 266         {
 267                 mlt_frame_close( frame );
 268         }
 269
 270         return error;
 271 }
 272
 273 /** Protected method for consumer to get frames from connected service
 274 */
 275
 276 mlt_frame mlt_consumer_get_frame( mlt_consumer this )
 277 {
 278         // Frame to return
 279         mlt_frame frame = NULL;
 280
 281         // Get the service assoicated to the consumer
 282         mlt_service service = MLT_CONSUMER_SERVICE( this );
 283
 284         // Get the consumer properties
 285         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 286
 287         // Get the frame
 288         if ( mlt_service_producer( service ) == NULL && mlt_properties_get_int( properties, "put_mode" ) )
 289         {
 290                 struct timeval now;
 291                 struct timespec tm;
 292                 pthread_mutex_lock( &this->put_mutex );
 293                 while ( this->put_active && this->put == NULL )
 294                 {
 295                         gettimeofday( &now, NULL );
 296                         tm.tv_sec = now.tv_sec + 1;
 297                         tm.tv_nsec = now.tv_usec * 1000;
 298                         pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
 299                 }
 300                 frame = this->put;
 301                 this->put = NULL;
 302                 pthread_cond_broadcast( &this->put_cond );
 303                 pthread_mutex_unlock( &this->put_mutex );
 304                 if ( frame != NULL )
 305                         mlt_service_apply_filters( service, frame, 0 );
 306         }
 307         else if ( mlt_service_producer( service ) != NULL )
 308         {
 309                 mlt_service_get_frame( service, &frame, 0 );
 310         }
 311         else
 312         {
 313                 frame = mlt_frame_init( );
 314         }
 315
 316         if ( frame != NULL )
 317         {
 318                 // Get the frame properties
 319                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
 320
 321                 // Get the test card producer
 322                 mlt_producer test_card = mlt_properties_get_data( properties, "test_card_producer", NULL );
 323
 324                 // Attach the test frame producer to it.
 325                 if ( test_card != NULL )
 326                         mlt_properties_set_data( frame_properties, "test_card_producer", test_card, 0, NULL, NULL );
 327
 328                 // Attach the rescale property
 329                 mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale" ) );
 330
 331                 // Aspect ratio and other jiggery pokery
 332                 mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
 333                 mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" ) );
 334                 mlt_properties_set( frame_properties, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
 335         }
 336
 337         // Return the frame
 338         return frame;
 339 }
 340
 341 static inline long time_difference( struct timeval *time1 )
 342 {
 343         struct timeval time2;
 344         time2.tv_sec = time1->tv_sec;
 345         time2.tv_usec = time1->tv_usec;
 346         gettimeofday( time1, NULL );
 347         return time1->tv_sec * 1000000 + time1->tv_usec - time2.tv_sec * 1000000 - time2.tv_usec;
 348 }
 349
 350 int mlt_consumer_profile( mlt_properties properties, char *profile )
 351 {
 352         double fps = mlt_properties_get_double( properties, "fps" );
 353         int recognised = 1;
 354         double display_num = 0;
 355         double display_den = 0;
 356         double pixel_num = 0;
 357         double pixel_den = 0;
 358         int width = 0;
 359         int height = 0;
 360
 361         if ( fps == 25.0 && profile != NULL )
 362         {
 363                 width = 720;
 364                 height = 576;
 365                 display_num = 4;
 366                 display_den = 3;
 367                 pixel_num = 59;
 368                 pixel_den = 54;
 369
 370                 if ( !strcmp( profile, "dv_wide" ) )
 371                 {
 372                         display_num = 16;
 373                         display_den = 9;
 374                         pixel_num = 118;
 375                         pixel_den = 81;
 376                 }
 377                 else if ( !strncmp( profile, "square_wide", 11 ) )
 378                 {
 379                         display_num = 16;
 380                         display_den = 9;
 381                         pixel_num = 1;
 382                         pixel_den = 1;
 383                         width = 1024;
 384                         height = 576;
 385                 }
 386                 else if ( !strncmp( profile, "square", 6 ) )
 387                 {
 388                         pixel_num = 1;
 389                         pixel_den = 1;
 390                         width = 768;
 391                         height = 576;
 392                 }
 393                 else if ( !strncmp( profile, "vcd", 3 ) )
 394                 {
 395                         width = 352;
 396                         height = 288;
 397                 }
 398                 else if ( !strncmp( profile, "cvd", 3 ) )
 399                 {
 400                         width = 352;
 401                         height = 576;
 402                         pixel_num = 59;
 403                         pixel_den = 27;
 404                 }
 405                 else if ( !strncmp( profile, "svcd_wide", 9 ) )
 406                 {
 407                         width = 480;
 408                         height = 576;
 409                         pixel_num = 59;
 410                         pixel_den = 27;
 411                         display_num = 16;
 412                         display_den = 9;
 413                 }
 414                 else if ( !strncmp( profile, "svcd", 4 ) )
 415                 {
 416                         width = 480;
 417                         height = 576;
 418                         pixel_num = 59;
 419                         pixel_den = 36;
 420                 }
 421                 else if ( strncmp( profile, "frame", 5 ) && strcmp( profile, "dv" ) )
 422                 {
 423                         recognised = 0;
 424                 }
 425         }
 426         else if ( profile != NULL )
 427         {
 428                 width = 720;
 429                 height = 480;
 430                 display_num = 4;
 431                 display_den = 3;
 432                 pixel_num = 10;
 433                 pixel_den = 11;
 434
 435                 if ( !strcmp( profile, "dv_wide" ) )
 436                 {
 437                         display_num = 16;
 438                         display_den = 9;
 439                         pixel_num = 40;
 440                         pixel_den = 33;
 441                 }
 442                 else if ( !strncmp( profile, "square_wide", 11 ) )
 443                 {
 444                         display_num = 16;
 445                         display_den = 9;
 446                         pixel_num = 1;
 447                         pixel_den = 1;
 448                         width = 854;
 449                         height = 480;
 450                 }
 451                 else if ( !strncmp( profile, "square", 6 ) )
 452                 {
 453                         pixel_num = 1;
 454                         pixel_den = 1;
 455                         width = 640;
 456                         height = 480;
 457                 }
 458                 else if ( !strncmp( profile, "vcd", 3 ) )
 459                 {
 460                         width = 352;
 461                         height = 240;
 462                 }
 463                 else if ( !strncmp( profile, "cvd", 3 ) )
 464                 {
 465                         width = 352;
 466                         height = 480;
 467                         pixel_num = 20;
 468                         pixel_den = 11;
 469                 }
 470                 else if ( !strncmp( profile, "svcd_wide", 9 ) )
 471                 {
 472                         width = 480;
 473                         height = 480;
 474                         pixel_num = 20;
 475                         pixel_den = 11;
 476                         display_num = 16;
 477                         display_den = 9;
 478                 }
 479                 else if ( !strncmp( profile, "svcd", 4 ) )
 480                 {
 481                         width = 480;
 482                         height = 480;
 483                         pixel_num = 15;
 484                         pixel_den = 11;
 485                 }
 486                 else if ( strncmp( profile, "frame", 5 ) && strcmp( profile, "dv" ) )
 487                 {
 488                         recognised = 0;
 489                 }
 490         }
 491
 492         // If width (or any of the above are 0), we use defaults otherwise we switch to recognised
 493         if ( width != 0 && recognised )
 494         {
 495                 if ( recognised && strchr( profile, ':' ) )
 496                         if ( sscanf( strchr( profile, ':' ) + 1, "%dx%d", &width, &height ) != 2 )
 497                                 recognised = -1;
 498
 499                 mlt_properties_set_int( properties, "width", width );
 500                 mlt_properties_set_int( properties, "height", height );
 501                 mlt_properties_set_double( properties, "aspect_ratio", pixel_num / pixel_den );
 502                 mlt_properties_set_int( properties, "aspect_ratio_num", pixel_num );
 503                 mlt_properties_set_int( properties, "aspect_ratio_den", pixel_den );
 504                 mlt_properties_set_double( properties, "display_ratio", display_num / display_den );
 505                 mlt_properties_set_int( properties, "display_ratio_num", display_num );
 506                 mlt_properties_set_int( properties, "display_ratio_den", display_den );
 507         }
 508
 509         return recognised;
 510 }
 511
 512 static void *consumer_read_ahead_thread( void *arg )
 513 {
 514         // The argument is the consumer
 515         mlt_consumer this = arg;
 516
 517         // Get the properties of the consumer
 518         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 519
 520         // Get the width and height
 521         int width = mlt_properties_get_int( properties, "width" );
 522         int height = mlt_properties_get_int( properties, "height" );
 523
 524         // See if video is turned off
 525         int video_off = mlt_properties_get_int( properties, "video_off" );
 526         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 527         int preview_format = mlt_properties_get_int( properties, "preview_format" );
 528
 529         // Get the audio settings
 530         mlt_audio_format afmt = mlt_audio_pcm;
 531         int counter = 0;
 532         double fps = mlt_properties_get_double( properties, "fps" );
 533         int channels = mlt_properties_get_int( properties, "channels" );
 534         int frequency = mlt_properties_get_int( properties, "frequency" );
 535         int samples = 0;
 536         int16_t *pcm = NULL;
 537
 538         // See if audio is turned off
 539         int audio_off = mlt_properties_get_int( properties, "audio_off" );
 540
 541         // Get the maximum size of the buffer
 542         int buffer = mlt_properties_get_int( properties, "buffer" ) + 1;
 543
 544         // General frame variable
 545         mlt_frame frame = NULL;
 546         uint8_t *image = NULL;
 547
 548         // Time structures
 549         struct timeval ante;
 550
 551         // Average time for get_frame and get_image
 552         int count = 1;
 553         int skipped = 0;
 554         int64_t time_wait = 0;
 555         int64_t time_frame = 0;
 556         int64_t time_process = 0;
 557         int skip_next = 0;
 558         mlt_service lock_object = NULL;
 559
 560         if ( preview_off && preview_format != 0 )
 561                 this->format = preview_format;
 562
 563         // Get the first frame
 564         frame = mlt_consumer_get_frame( this );
 565
 566         // Get the lock object
 567         lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 568
 569         // Lock it
 570         if ( lock_object ) mlt_service_lock( lock_object );
 571
 572         // Get the image of the first frame
 573         if ( !video_off )
 574         {
 575                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 576                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 577         }
 578
 579         if ( !audio_off )
 580         {
 581                 samples = mlt_sample_calculator( fps, frequency, counter++ );
 582                 mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 583         }
 584
 585         // Unlock the lock object
 586         if ( lock_object ) mlt_service_unlock( lock_object );
 587
 588         // Mark as rendered
 589         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 590
 591         // Get the starting time (can ignore the times above)
 592         gettimeofday( &ante, NULL );
 593
 594         // Continue to read ahead
 595         while ( this->ahead )
 596         {
 597                 // Fetch width/height again
 598                 width = mlt_properties_get_int( properties, "width" );
 599                 height = mlt_properties_get_int( properties, "height" );
 600
 601                 // Put the current frame into the queue
 602                 pthread_mutex_lock( &this->mutex );
 603                 while( this->ahead && mlt_deque_count( this->queue ) >= buffer )
 604                         pthread_cond_wait( &this->cond, &this->mutex );
 605                 mlt_deque_push_back( this->queue, frame );
 606                 pthread_cond_broadcast( &this->cond );
 607                 pthread_mutex_unlock( &this->mutex );
 608
 609                 time_wait += time_difference( &ante );
 610
 611                 // Get the next frame
 612                 frame = mlt_consumer_get_frame( this );
 613                 time_frame += time_difference( &ante );
 614
 615                 // If there's no frame, we're probably stopped...
 616                 if ( frame == NULL )
 617                         continue;
 618
 619                 // Attempt to fetch the lock object
 620                 lock_object = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "consumer_lock_service", NULL );
 621
 622                 // Increment the count
 623                 count ++;
 624
 625                 // Lock if there's a lock object
 626                 if ( lock_object ) mlt_service_lock( lock_object );
 627
 628                 // All non normal playback frames should be shown
 629                 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "_speed" ) != 1 )
 630                 {
 631                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "consumer_deinterlace", 1 );
 632                         skipped = 0;
 633                         time_frame = 0;
 634                         time_process = 0;
 635                         time_wait = 0;
 636                         count = 1;
 637                         skip_next = 0;
 638                 }
 639
 640                 // Get the image
 641                 if ( !skip_next )
 642                 {
 643                         // Get the image, mark as rendered and time it
 644                         if ( !video_off )
 645                         {
 646                                 mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
 647                                 mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
 648                         }
 649                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 650                 }
 651                 else
 652                 {
 653                         // Increment the number of sequentially skipped frames
 654                         skipped ++;
 655                         skip_next = 0;
 656
 657                         // If we've reached an unacceptable level, reset everything
 658                         if ( skipped > 5 )
 659                         {
 660                                 skipped = 0;
 661                                 time_frame = 0;
 662                                 time_process = 0;
 663                                 time_wait = 0;
 664                                 count = 1;
 665                         }
 666                 }
 667
 668                 // Always process audio
 669                 if ( !audio_off )
 670                 {
 671                         samples = mlt_sample_calculator( fps, frequency, counter++ );
 672                         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 673                 }
 674
 675                 // Increment the time take for this frame
 676                 time_process += time_difference( &ante );
 677
 678                 // Determine if the next frame should be skipped
 679                 if ( mlt_deque_count( this->queue ) <= 5 && ( ( time_wait + time_frame + time_process ) / count ) > 40000 )
 680                         skip_next = 1;
 681
 682                 // Unlock if there's a lock object
 683                 if ( lock_object ) mlt_service_unlock( lock_object );
 684         }
 685
 686         // Remove the last frame
 687         mlt_frame_close( frame );
 688
 689         return NULL;
 690 }
 691
 692 static void consumer_read_ahead_start( mlt_consumer this )
 693 {
 694         // We're running now
 695         this->ahead = 1;
 696
 697         // Create the frame queue
 698         this->queue = mlt_deque_init( );
 699
 700         // Create the mutex
 701         pthread_mutex_init( &this->mutex, NULL );
 702
 703         // Create the condition
 704         pthread_cond_init( &this->cond, NULL );
 705
 706         // Create the read ahead
 707         pthread_create( &this->ahead_thread, NULL, consumer_read_ahead_thread, this );
 708 }
 709
 710 static void consumer_read_ahead_stop( mlt_consumer this )
 711 {
 712         // Make sure we're running
 713         if ( this->ahead )
 714         {
 715                 // Inform thread to stop
 716                 this->ahead = 0;
 717
 718                 // Broadcast to the condition in case it's waiting
 719                 pthread_mutex_lock( &this->mutex );
 720                 pthread_cond_broadcast( &this->cond );
 721                 pthread_mutex_unlock( &this->mutex );
 722
 723                 // Broadcast to the put condition in case it's waiting
 724                 pthread_mutex_lock( &this->put_mutex );
 725                 pthread_cond_broadcast( &this->put_cond );
 726                 pthread_mutex_unlock( &this->put_mutex );
 727
 728                 // Join the thread
 729                 pthread_join( this->ahead_thread, NULL );
 730
 731                 // Destroy the mutex
 732                 pthread_mutex_destroy( &this->mutex );
 733
 734                 // Destroy the condition
 735                 pthread_cond_destroy( &this->cond );
 736
 737                 // Wipe the queue
 738                 while ( mlt_deque_count( this->queue ) )
 739                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 740
 741                 // Close the queue
 742                 mlt_deque_close( this->queue );
 743         }
 744 }
 745
 746 void mlt_consumer_purge( mlt_consumer this )
 747 {
 748         if ( this->ahead )
 749         {
 750                 pthread_mutex_lock( &this->mutex );
 751                 while ( mlt_deque_count( this->queue ) )
 752                         mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 753                 pthread_cond_broadcast( &this->cond );
 754                 pthread_mutex_unlock( &this->mutex );
 755         }
 756 }
 757
 758 mlt_frame mlt_consumer_rt_frame( mlt_consumer this )
 759 {
 760         // Frame to return
 761         mlt_frame frame = NULL;
 762
 763         // Get the properties
 764         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 765
 766         // Check if the user has requested real time or not
 767         if ( this->real_time )
 768         {
 769                 int size = 1;
 770
 771                 // Is the read ahead running?
 772                 if ( this->ahead == 0 )
 773                 {
 774                         int buffer = mlt_properties_get_int( properties, "buffer" );
 775                         int prefill = mlt_properties_get_int( properties, "prefill" );
 776                         consumer_read_ahead_start( this );
 777                         if ( buffer > 1 )
 778                                 size = prefill > 0 && prefill < buffer ? prefill : buffer;
 779                 }
 780
 781                 // Get frame from queue
 782                 pthread_mutex_lock( &this->mutex );
 783                 while( this->ahead && mlt_deque_count( this->queue ) < size )
 784                         pthread_cond_wait( &this->cond, &this->mutex );
 785                 frame = mlt_deque_pop_front( this->queue );
 786                 pthread_cond_broadcast( &this->cond );
 787                 pthread_mutex_unlock( &this->mutex );
 788         }
 789         else
 790         {
 791                 // Get the frame in non real time
 792                 frame = mlt_consumer_get_frame( this );
 793
 794                 // This isn't true, but from the consumers perspective it is
 795                 if ( frame != NULL )
 796                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
 797         }
 798
 799         return frame;
 800 }
 801
 802 /** Callback for the implementation to indicate a stopped condition.
 803 */
 804
 805 void mlt_consumer_stopped( mlt_consumer this )
 806 {
 807         mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( this ), "running", 0 );
 808         mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-stopped", NULL );
 809 }
 810
 811 /** Stop the consumer.
 812 */
 813
 814 int mlt_consumer_stop( mlt_consumer this )
 815 {
 816         // Get the properies
 817         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 818         char *debug = mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "debug" );
 819
 820         // Just in case...
 821         if ( debug ) fprintf( stderr, "%s: stopping put waiting\n", debug );
 822         pthread_mutex_lock( &this->put_mutex );
 823         this->put_active = 0;
 824         pthread_cond_broadcast( &this->put_cond );
 825         pthread_mutex_unlock( &this->put_mutex );
 826
 827         // Stop the consumer
 828         if ( debug ) fprintf( stderr, "%s: stopping consumer\n", debug );
 829         if ( this->stop != NULL )
 830                 this->stop( this );
 831
 832         // Check if the user has requested real time or not and stop if necessary
 833         if ( debug ) fprintf( stderr, "%s: stopping read_ahead\n", debug );
 834         if ( mlt_properties_get_int( properties, "real_time" ) )
 835                 consumer_read_ahead_stop( this );
 836
 837         // Kill the test card
 838         mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
 839
 840         // Check and run a post command
 841         if ( mlt_properties_get( properties, "post" ) )
 842                 system( mlt_properties_get( properties, "post" ) );
 843
 844         if ( debug ) fprintf( stderr, "%s: stopped\n", debug );
 845
 846         return 0;
 847 }
 848
 849 /** Determine if the consumer is stopped.
 850 */
 851
 852 int mlt_consumer_is_stopped( mlt_consumer this )
 853 {
 854         // Check if the consumer is stopped
 855         if ( this->is_stopped != NULL )
 856                 return this->is_stopped( this );
 857
 858         return 0;
 859 }
 860
 861 /** Close the consumer.
 862 */
 863
 864 void mlt_consumer_close( mlt_consumer this )
 865 {
 866         if ( this != NULL && mlt_properties_dec_ref( MLT_CONSUMER_PROPERTIES( this ) ) <= 0 )
 867         {
 868                 // Get the childs close function
 869                 void ( *consumer_close )( ) = this->close;
 870
 871                 if ( consumer_close )
 872                 {
 873                         // Just in case...
 874                         //mlt_consumer_stop( this );
 875
 876                         this->close = NULL;
 877                         consumer_close( this );
 878                 }
 879                 else
 880                 {
 881                         // Make sure it only gets called once
 882                         this->parent.close = NULL;
 883
 884                         // Destroy the push mutex and condition
 885                         pthread_mutex_destroy( &this->put_mutex );
 886                         pthread_cond_destroy( &this->put_cond );
 887
 888                         mlt_service_close( &this->parent );
 889                 }
 890         }
 891 }