git.sesse.net Git - mlt/blob - src/modules/decklink/consumer_decklink.cpp

   1 /*
   2  * consumer_decklink.c -- output through Blackmagic Design DeckLink
   3  * Copyright (C) 2010 Dan Dennedy <dan@dennedy.org>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with consumer library; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #define __STDC_FORMAT_MACROS  /* see inttypes.h */
  21 #include <framework/mlt.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <pthread.h>
  25 #include <unistd.h>
  26 #include <sys/time.h>
  27 #include <limits.h>
  28 #ifdef WIN32
  29 #include <objbase.h>
  30 #include "DeckLinkAPI_h.h"
  31 #else
  32 #include "DeckLinkAPI.h"
  33 #endif
  34
  35 static const unsigned PREROLL_MINIMUM = 3;
  36
  37 class DeckLinkConsumer
  38         : public IDeckLinkVideoOutputCallback
  39 {
  40 private:
  41         mlt_consumer_s              m_consumer;
  42         IDeckLink*                  m_deckLink;
  43         IDeckLinkOutput*            m_deckLinkOutput;
  44         IDeckLinkDisplayMode*       m_displayMode;
  45         int                         m_width;
  46         int                         m_height;
  47         BMDTimeValue                m_duration;
  48         BMDTimeScale                m_timescale;
  49         double                      m_fps;
  50         uint64_t                    m_count;
  51         int                         m_channels;
  52         unsigned                    m_dropped;
  53         IDeckLinkMutableVideoFrame* m_decklinkFrame;
  54         bool                        m_isAudio;
  55         int                         m_isKeyer;
  56         IDeckLinkKeyer*             m_deckLinkKeyer;
  57         bool                        m_terminate_on_pause;
  58         uint32_t                    m_preroll;
  59         uint32_t                    m_acnt;
  60         bool                        m_reprio;
  61
  62         IDeckLinkDisplayMode* getDisplayMode()
  63         {
  64                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( getConsumer() ) );
  65                 IDeckLinkDisplayModeIterator* iter;
  66                 IDeckLinkDisplayMode* mode;
  67                 IDeckLinkDisplayMode* result = 0;
  68
  69                 if ( m_deckLinkOutput->GetDisplayModeIterator( &iter ) == S_OK )
  70                 {
  71                         while ( !result && iter->Next( &mode ) == S_OK )
  72                         {
  73                                 m_width = mode->GetWidth();
  74                                 m_height = mode->GetHeight();
  75                                 mode->GetFrameRate( &m_duration, &m_timescale );
  76                                 m_fps = (double) m_timescale / m_duration;
  77                                 int p = mode->GetFieldDominance() == bmdProgressiveFrame;
  78                                 mlt_log_verbose( getConsumer(), "BMD mode %dx%d %.3f fps prog %d\n", m_width, m_height, m_fps, p );
  79
  80                                 if ( m_width == profile->width && p == profile->progressive
  81                                          && m_fps == mlt_profile_fps( profile )
  82                                          && ( m_height == profile->height || ( m_height == 486 && profile->height == 480 ) ) )
  83                                         result = mode;
  84                         }
  85                 }
  86
  87                 return result;
  88         }
  89
  90 public:
  91         mlt_consumer getConsumer()
  92                 { return &m_consumer; }
  93
  94         ~DeckLinkConsumer()
  95         {
  96                 if ( m_deckLinkKeyer )
  97                         m_deckLinkKeyer->Release();
  98                 if ( m_deckLinkOutput )
  99                         m_deckLinkOutput->Release();
 100                 if ( m_deckLink )
 101                         m_deckLink->Release();
 102         }
 103
 104         bool open( unsigned card = 0 )
 105         {
 106                 unsigned i = 0;
 107 #ifdef WIN32
 108                 IDeckLinkIterator* deckLinkIterator = NULL;
 109                 HRESULT result =  CoInitialize( NULL );
 110                 if ( FAILED( result ) )
 111                 {
 112                         mlt_log_error( getConsumer(), "COM initialization failed\n" );
 113                         return false;
 114                 }
 115                 result = CoCreateInstance( CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL, IID_IDeckLinkIterator, (void**) &deckLinkIterator );
 116                 if ( FAILED( result ) )
 117                 {
 118                         mlt_log_error( getConsumer(), "The DeckLink drivers not installed.\n" );
 119                         return false;
 120                 }
 121 #else
 122                 IDeckLinkIterator* deckLinkIterator = CreateDeckLinkIteratorInstance();
 123
 124                 if ( !deckLinkIterator )
 125                 {
 126                         mlt_log_error( getConsumer(), "The DeckLink drivers not installed.\n" );
 127                         return false;
 128                 }
 129 #endif
 130
 131                 // Connect to the Nth DeckLink instance
 132                 do {
 133                         if ( deckLinkIterator->Next( &m_deckLink ) != S_OK )
 134                         {
 135                                 mlt_log_error( getConsumer(), "DeckLink card not found\n" );
 136                                 deckLinkIterator->Release();
 137                                 return false;
 138                         }
 139                 } while ( ++i <= card );
 140                 deckLinkIterator->Release();
 141
 142                 // Obtain the audio/video output interface (IDeckLinkOutput)
 143                 if ( m_deckLink->QueryInterface( IID_IDeckLinkOutput, (void**)&m_deckLinkOutput ) != S_OK )
 144                 {
 145                         mlt_log_error( getConsumer(), "No DeckLink cards support output\n" );
 146                         m_deckLink->Release();
 147                         m_deckLink = 0;
 148                         return false;
 149                 }
 150
 151                 // Get the keyer interface
 152                 IDeckLinkAttributes *deckLinkAttributes = 0;
 153                 m_deckLinkKeyer = 0;
 154                 if ( m_deckLink->QueryInterface( IID_IDeckLinkAttributes, (void**) &deckLinkAttributes ) == S_OK )
 155                 {
 156 #ifdef WIN32
 157                         BOOL flag = FALSE;
 158 #else
 159                         bool flag = false;
 160 #endif
 161                         if ( deckLinkAttributes->GetFlag( BMDDeckLinkSupportsInternalKeying, &flag ) == S_OK && flag )
 162                         {
 163                                 if ( m_deckLink->QueryInterface( IID_IDeckLinkKeyer, (void**) &m_deckLinkKeyer ) != S_OK )
 164                                 {
 165                                         mlt_log_error( getConsumer(), "Failed to get keyer\n" );
 166                                         m_deckLinkOutput->Release();
 167                                         m_deckLinkOutput = 0;
 168                                         m_deckLink->Release();
 169                                         m_deckLink = 0;
 170                                         return false;
 171                                 }
 172                         }
 173                         deckLinkAttributes->Release();
 174                 }
 175
 176                 // Provide this class as a delegate to the audio and video output interfaces
 177                 m_deckLinkOutput->SetScheduledFrameCompletionCallback( this );
 178
 179                 return true;
 180         }
 181
 182         bool start( unsigned preroll )
 183         {
 184                 unsigned i;
 185                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( getConsumer() );
 186
 187                 // Initialize members
 188                 m_count = 0;
 189                 m_dropped = 0;
 190                 m_decklinkFrame = NULL;
 191                 preroll = preroll < PREROLL_MINIMUM ? PREROLL_MINIMUM : preroll;
 192                 m_channels = mlt_properties_get_int( properties, "channels" );
 193                 m_isAudio = !mlt_properties_get_int( properties, "audio_off" );
 194                 m_terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
 195
 196
 197                 m_displayMode = getDisplayMode();
 198                 if ( !m_displayMode )
 199                 {
 200                         mlt_log_error( getConsumer(), "Profile is not compatible with decklink.\n" );
 201                         return false;
 202                 }
 203
 204                 // Set the keyer
 205                 if ( m_deckLinkKeyer && ( m_isKeyer = mlt_properties_get_int( properties, "keyer" ) ) )
 206                 {
 207                         bool external = ( m_isKeyer == 2 );
 208                         double level = mlt_properties_get_double( properties, "keyer_level" );
 209
 210                         if ( m_deckLinkKeyer->Enable( external ) != S_OK )
 211                                 mlt_log_error( getConsumer(), "Failed to enable %s keyer\n",
 212                                         external ? "external" : "internal" );
 213                         m_deckLinkKeyer->SetLevel( level <= 1 ? ( level > 0 ? 255 * level : 255 ) : 255 );
 214                 }
 215                 else if ( m_deckLinkKeyer )
 216                 {
 217                         m_deckLinkKeyer->Disable();
 218                 }
 219
 220                 // Set the video output mode
 221                 if ( S_OK != m_deckLinkOutput->EnableVideoOutput( m_displayMode->GetDisplayMode(), bmdVideoOutputFlagDefault ) )
 222                 {
 223                         mlt_log_error( getConsumer(), "Failed to enable video output\n" );
 224                         return false;
 225                 }
 226
 227                 // Set the audio output mode
 228                 if ( !m_isAudio )
 229                 {
 230                         m_deckLinkOutput->DisableAudioOutput();
 231                         return true;
 232                 }
 233                 if ( S_OK != m_deckLinkOutput->EnableAudioOutput( bmdAudioSampleRate48kHz, bmdAudioSampleType16bitInteger,
 234                         m_channels, bmdAudioOutputStreamTimestamped ) )
 235                 {
 236                         mlt_log_error( getConsumer(), "Failed to enable audio output\n" );
 237                         stop();
 238                         return false;
 239                 }
 240
 241                 m_preroll = preroll;
 242                 m_reprio = false;
 243
 244                 // preroll frames
 245                 for( i = 0; i < preroll; i++ )
 246                         ScheduleNextFrame( true );
 247
 248                 // start scheduled playback
 249                 m_deckLinkOutput->StartScheduledPlayback( 0, m_timescale, 1.0 );
 250
 251                 // Set the running state
 252                 mlt_properties_set_int( properties, "running", 1 );
 253
 254                 return true;
 255         }
 256
 257         bool stop()
 258         {
 259                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( getConsumer() );
 260
 261                 // set running state is 0
 262                 mlt_properties_set_int( properties, "running", 0 );
 263                 mlt_consumer_stopped( getConsumer() );
 264
 265                 // release decklink frame
 266                 if ( m_decklinkFrame )
 267                         m_decklinkFrame->Release();
 268                 m_decklinkFrame = NULL;
 269
 270                 // Stop the audio and video output streams immediately
 271                 if ( m_deckLinkOutput )
 272                 {
 273                         m_deckLinkOutput->StopScheduledPlayback( 0, 0, 0 );
 274                         m_deckLinkOutput->DisableAudioOutput();
 275                         m_deckLinkOutput->DisableVideoOutput();
 276                 }
 277
 278                 return true;
 279         }
 280
 281         void renderAudio( mlt_frame frame )
 282         {
 283                 mlt_audio_format format = mlt_audio_s16;
 284                 int frequency = bmdAudioSampleRate48kHz;
 285                 int samples = mlt_sample_calculator( m_fps, frequency, m_count );
 286                 int16_t *pcm = 0;
 287
 288                 if ( !mlt_frame_get_audio( frame, (void**) &pcm, &format, &frequency, &m_channels, &samples ) )
 289                 {
 290 #ifdef WIN32
 291                         unsigned long written = 0;
 292 #else
 293                         uint32_t written = 0;
 294 #endif
 295                         BMDTimeValue streamTime = m_count * frequency * m_duration / m_timescale;
 296                         m_deckLinkOutput->GetBufferedAudioSampleFrameCount( &written );
 297                         if ( written > (m_preroll + 1) * samples )
 298                         {
 299                                 mlt_log_verbose( getConsumer(), "renderAudio: will flush %lu audiosamples\n", written );
 300                                 m_deckLinkOutput->FlushBufferedAudioSamples();
 301                         };
 302 #ifdef WIN32
 303                         m_deckLinkOutput->ScheduleAudioSamples( pcm, samples, streamTime, frequency, (unsigned long*) &written );
 304 #else
 305                         m_deckLinkOutput->ScheduleAudioSamples( pcm, samples, streamTime, frequency, &written );
 306 #endif
 307
 308                         if ( written != (uint32_t) samples )
 309                                 mlt_log_verbose( getConsumer(), "renderAudio: samples=%d, written=%lu\n", samples, written );
 310                 }
 311         }
 312
 313         bool createFrame( IDeckLinkMutableVideoFrame** decklinkFrame )
 314         {
 315                 BMDPixelFormat format = m_isKeyer? bmdFormat8BitARGB : bmdFormat8BitYUV;
 316                 IDeckLinkMutableVideoFrame* frame = 0;
 317                 uint8_t *buffer = 0;
 318                 int stride = m_width * ( m_isKeyer? 4 : 2 );
 319
 320                 *decklinkFrame = NULL;
 321
 322                 // Generate a DeckLink video frame
 323                 if ( S_OK != m_deckLinkOutput->CreateVideoFrame( m_width, m_height,
 324                         stride, format, bmdFrameFlagDefault, &frame ) )
 325                 {
 326                         mlt_log_verbose( getConsumer(), "Failed to create video frame\n" );
 327                         stop();
 328                         return false;
 329                 }
 330
 331                 // Make the first line black for field order correction.
 332                 if ( S_OK == frame->GetBytes( (void**) &buffer ) && buffer )
 333                 {
 334                         if ( m_isKeyer )
 335                         {
 336                                 memset( buffer, 0, stride );
 337                         }
 338                         else for ( int i = 0; i < m_width; i++ )
 339                         {
 340                                 *buffer++ = 128;
 341                                 *buffer++ = 16;
 342                         }
 343                 }
 344
 345                 *decklinkFrame = frame;
 346
 347                 return true;
 348         }
 349
 350         void renderVideo( mlt_frame frame )
 351         {
 352                 mlt_image_format format = m_isKeyer? mlt_image_rgb24a : mlt_image_yuv422;
 353                 uint8_t* image = 0;
 354                 int rendered = mlt_properties_get_int( MLT_FRAME_PROPERTIES(frame), "rendered");
 355                 int height = m_height;
 356
 357                 if ( rendered && !mlt_frame_get_image( frame, &image, &format, &m_width, &height, 0 ) )
 358                 {
 359                         uint8_t* buffer = 0;
 360                         int stride = m_width * ( m_isKeyer? 4 : 2 );
 361
 362                         if ( m_decklinkFrame )
 363                                 m_decklinkFrame->Release();
 364                         if ( createFrame( &m_decklinkFrame ) )
 365                                 m_decklinkFrame->GetBytes( (void**) &buffer );
 366
 367                         if ( buffer )
 368                         {
 369                                 int progressive = mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "progressive" );
 370
 371                                 // NTSC SDI is always 486 lines
 372                                 if ( m_height == 486 && height == 480 )
 373                                 {
 374                                         // blank first 6 lines
 375                                         if ( m_isKeyer )
 376                                         {
 377                                                 memset( buffer, 0, stride * 6 );
 378                                                 buffer += stride * 6;
 379                                         }
 380                                         else for ( int i = 0; i < m_width * 6; i++ )
 381                                         {
 382                                                 *buffer++ = 128;
 383                                                 *buffer++ = 16;
 384                                         }
 385                                 }
 386                                 if ( !m_isKeyer )
 387                                 {
 388                                         // Normal non-keyer playout - needs byte swapping
 389                                         if ( !progressive && m_displayMode->GetFieldDominance() == bmdUpperFieldFirst )
 390                                                 // convert lower field first to top field first
 391                                                 swab( (char*) image, (char*) buffer + stride, stride * ( height - 1 ) );
 392                                         else
 393                                                 swab( (char*) image, (char*) buffer, stride * height );
 394                                 }
 395                                 else if ( !mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "test_image" ) )
 396                                 {
 397                                         // Normal keyer output
 398                                         int y = height + 1;
 399                                         uint32_t* s = (uint32_t*) image;
 400                                         uint32_t* d = (uint32_t*) buffer;
 401
 402                                         if ( !progressive && m_displayMode->GetFieldDominance() == bmdUpperFieldFirst )
 403                                         {
 404                                                 // Correct field order
 405                                                 height--;
 406                                                 y--;
 407                                                 d += m_width;
 408                                         }
 409
 410                                         // Need to relocate alpha channel RGBA => ARGB
 411                                         while ( --y )
 412                                         {
 413                                                 int x = m_width + 1;
 414                                                 while ( --x )
 415                                                 {
 416                                                         *d++ = ( *s << 8 ) | ( *s >> 24 );
 417                                                         s++;
 418                                                 }
 419                                         }
 420                                 }
 421                                 else
 422                                 {
 423                                         // Keying blank frames - nullify alpha
 424                                         memset( buffer, 0, stride * height );
 425                                 }
 426                         }
 427                 }
 428                 if ( m_decklinkFrame )
 429                         m_deckLinkOutput->ScheduleVideoFrame( m_decklinkFrame, m_count * m_duration, m_duration, m_timescale );
 430
 431                 if ( !rendered )
 432                         mlt_log_verbose( getConsumer(), "dropped video frame %u\n", ++m_dropped );
 433         }
 434
 435         HRESULT render( mlt_frame frame )
 436         {
 437                 HRESULT result = S_OK;
 438
 439                 // Get the audio
 440                 double speed = mlt_properties_get_double( MLT_FRAME_PROPERTIES(frame), "_speed" );
 441                 if ( m_isAudio && speed == 1.0 )
 442                         renderAudio( frame );
 443
 444                 // Get the video
 445                 renderVideo( frame );
 446                 ++m_count;
 447
 448                 return result;
 449         }
 450
 451         // *** DeckLink API implementation of IDeckLinkVideoOutputCallback IDeckLinkAudioOutputCallback *** //
 452
 453         // IUnknown needs only a dummy implementation
 454         virtual HRESULT STDMETHODCALLTYPE QueryInterface( REFIID iid, LPVOID *ppv )
 455                 { return E_NOINTERFACE; }
 456         virtual ULONG STDMETHODCALLTYPE AddRef()
 457                 { return 1; }
 458         virtual ULONG STDMETHODCALLTYPE Release()
 459                 { return 1; }
 460
 461         /************************* DeckLink API Delegate Methods *****************************/
 462
 463         virtual HRESULT STDMETHODCALLTYPE ScheduledFrameCompleted( IDeckLinkVideoFrame* completedFrame, BMDOutputFrameCompletionResult completed )
 464         {
 465                 if( !m_reprio )
 466                 {
 467                         mlt_properties properties = MLT_CONSUMER_PROPERTIES( getConsumer() );
 468
 469                         if ( mlt_properties_get( properties, "priority" ) )
 470                         {
 471                                 int r;
 472                                 pthread_t thread;
 473                                 pthread_attr_t tattr;
 474                                 struct sched_param param;
 475
 476                                 pthread_attr_init(&tattr);
 477                                 pthread_attr_setschedpolicy(&tattr, SCHED_FIFO);
 478
 479                                 if ( !strcmp( "max", mlt_properties_get( properties, "priority" ) ) )
 480                                         param.sched_priority = sched_get_priority_max(SCHED_FIFO) - 1;
 481                                 else if ( !strcmp( "min", mlt_properties_get( properties, "priority" ) ) )
 482                                         param.sched_priority = sched_get_priority_min(SCHED_FIFO) + 1;
 483                                 else
 484                                         param.sched_priority = mlt_properties_get_int( properties, "priority" );
 485
 486                                 pthread_attr_setschedparam(&tattr, &param);
 487
 488                                 thread = pthread_self();
 489
 490                                 r = pthread_setschedparam(thread, SCHED_FIFO, &param);
 491                                 if( r )
 492                                         mlt_log_verbose( getConsumer(),
 493                                                 "ScheduledFrameCompleted: pthread_setschedparam retured %d\n", r);
 494                                 else
 495                                         mlt_log_verbose( getConsumer(),
 496                                                 "ScheduledFrameCompleted: param.sched_priority=%d\n", param.sched_priority);
 497                         };
 498
 499                         m_reprio = true;
 500                 };
 501
 502 #ifdef WIN32
 503                 unsigned long cnt;
 504 #else
 505                 uint32_t cnt;
 506 #endif
 507                 m_deckLinkOutput->GetBufferedAudioSampleFrameCount( &cnt );
 508                 if ( cnt != m_acnt )
 509                 {
 510                         mlt_log_verbose( getConsumer(),
 511                                 "ScheduledFrameCompleted: GetBufferedAudioSampleFrameCount %u -> %lu, m_count=%"PRIu64"\n",
 512                                 m_acnt, cnt, m_count );
 513                         m_acnt = cnt;
 514                 }
 515
 516                 // When a video frame has been released by the API, schedule another video frame to be output
 517
 518                 // ignore handler if frame was flushed
 519                 if ( bmdOutputFrameFlushed == completed )
 520                         return S_OK;
 521
 522                 // schedule next frame
 523                 ScheduleNextFrame( false );
 524
 525                 // step forward frames counter if underrun
 526                 if ( bmdOutputFrameDisplayedLate == completed )
 527                 {
 528                         mlt_log_verbose( getConsumer(), "ScheduledFrameCompleted: bmdOutputFrameDisplayedLate == completed\n" );
 529                         m_count++;
 530                 }
 531                 if ( bmdOutputFrameDropped == completed )
 532                 {
 533                         mlt_log_verbose( getConsumer(), "ScheduledFrameCompleted: bmdOutputFrameDropped == completed\n" );
 534                         m_count++;
 535                 }
 536
 537                 return S_OK;
 538         }
 539
 540         virtual HRESULT STDMETHODCALLTYPE ScheduledPlaybackHasStopped()
 541         {
 542                 return mlt_consumer_is_stopped( getConsumer() ) ? S_FALSE : S_OK;
 543         }
 544
 545
 546         void ScheduleNextFrame( bool preroll )
 547         {
 548                 // get the consumer
 549                 mlt_consumer consumer = getConsumer();
 550
 551                 // Get the properties
 552                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 553
 554                 // Frame and size
 555                 mlt_frame frame = NULL;
 556
 557                 if( mlt_properties_get_int( properties, "running" ) || preroll )
 558                 {
 559                         frame = mlt_consumer_rt_frame( consumer );
 560                         if ( frame != NULL )
 561                         {
 562                                 render( frame );
 563
 564                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 565
 566                                 // terminate on pause
 567                                 if ( m_terminate_on_pause &&
 568                                         mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0 )
 569                                         stop();
 570
 571                                 mlt_frame_close( frame );
 572                         }
 573                 }
 574         }
 575 };
 576
 577 /** Start the consumer.
 578  */
 579
 580 static int start( mlt_consumer consumer )
 581 {
 582         // Get the properties
 583         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 584         DeckLinkConsumer* decklink = (DeckLinkConsumer*) consumer->child;
 585         return decklink->start( mlt_properties_get_int( properties, "preroll" ) ) ? 0 : 1;
 586 }
 587
 588 /** Stop the consumer.
 589  */
 590
 591 static int stop( mlt_consumer consumer )
 592 {
 593         // Get the properties
 594         DeckLinkConsumer* decklink = (DeckLinkConsumer*) consumer->child;
 595         return decklink->stop();
 596 }
 597
 598 /** Determine if the consumer is stopped.
 599  */
 600
 601 static int is_stopped( mlt_consumer consumer )
 602 {
 603         // Get the properties
 604         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 605         return !mlt_properties_get_int( properties, "running" );
 606 }
 607
 608 /** Close the consumer.
 609  */
 610
 611 static void close( mlt_consumer consumer )
 612 {
 613         // Stop the consumer
 614         mlt_consumer_stop( consumer );
 615
 616         // Close the parent
 617         consumer->close = NULL;
 618         mlt_consumer_close( consumer );
 619
 620         // Free the memory
 621         delete (DeckLinkConsumer*) consumer->child;
 622 }
 623
 624 extern "C" {
 625
 626 /** Initialise the consumer.
 627  */
 628
 629 mlt_consumer consumer_decklink_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
 630 {
 631         // Allocate the consumer
 632         DeckLinkConsumer* decklink = new DeckLinkConsumer();
 633         mlt_consumer consumer = NULL;
 634
 635         // If allocated
 636         if ( decklink && !mlt_consumer_init( decklink->getConsumer(), decklink, profile ) )
 637         {
 638                 // If initialises without error
 639                 if ( decklink->open( arg? atoi(arg) : 0 ) )
 640                 {
 641                         consumer = decklink->getConsumer();
 642
 643                         // Setup callbacks
 644                         consumer->close = close;
 645                         consumer->start = start;
 646                         consumer->stop = stop;
 647                         consumer->is_stopped = is_stopped;
 648                         mlt_properties_set( MLT_CONSUMER_PROPERTIES(consumer), "deinterlace_method", "onefield" );
 649                 }
 650         }
 651
 652         // Return consumer
 653         return consumer;
 654 }
 655
 656 extern mlt_producer producer_decklink_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg );
 657
 658 static mlt_properties metadata( mlt_service_type type, const char *id, void *data )
 659 {
 660         char file[ PATH_MAX ];
 661         const char *service_type = NULL;
 662         switch ( type )
 663         {
 664                 case consumer_type:
 665                         service_type = "consumer";
 666                         break;
 667                 case producer_type:
 668                         service_type = "producer";
 669                         break;
 670                 default:
 671                         return NULL;
 672         }
 673         snprintf( file, PATH_MAX, "%s/decklink/%s_%s.yml", mlt_environment( "MLT_DATA" ), service_type, id );
 674         return mlt_properties_parse_yaml( file );
 675 }
 676
 677 MLT_REPOSITORY
 678 {
 679         MLT_REGISTER( consumer_type, "decklink", consumer_decklink_init );
 680         MLT_REGISTER( producer_type, "decklink", producer_decklink_init );
 681         MLT_REGISTER_METADATA( consumer_type, "decklink", metadata, NULL );
 682         MLT_REGISTER_METADATA( producer_type, "decklink", metadata, NULL );
 683 }
 684
 685 } // extern C