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 #include <pthread.h>
  29 #ifdef WIN32
  30 #include <objbase.h>
  31 #include "DeckLinkAPI_h.h"
  32 #else
  33 #include "DeckLinkAPI.h"
  34 #endif
  35
  36 #define SAFE_RELEASE(V) if (V) { V->Release(); V = NULL; }
  37
  38 static const unsigned PREROLL_MINIMUM = 3;
  39
  40 class DeckLinkConsumer
  41         : public IDeckLinkVideoOutputCallback
  42 {
  43 private:
  44         mlt_consumer_s              m_consumer;
  45         IDeckLink*                  m_deckLink;
  46         IDeckLinkOutput*            m_deckLinkOutput;
  47         IDeckLinkDisplayMode*       m_displayMode;
  48         int                         m_width;
  49         int                         m_height;
  50         BMDTimeValue                m_duration;
  51         BMDTimeScale                m_timescale;
  52         double                      m_fps;
  53         uint64_t                    m_count;
  54         int                         m_channels;
  55         unsigned                    m_dropped;
  56         IDeckLinkMutableVideoFrame* m_decklinkFrame;
  57         bool                        m_isAudio;
  58         int                         m_isKeyer;
  59         IDeckLinkKeyer*             m_deckLinkKeyer;
  60         bool                        m_terminate_on_pause;
  61         uint32_t                    m_preroll;
  62         uint32_t                    m_acnt;
  63         bool                        m_reprio;
  64         pthread_t                   m_prerollThread;
  65
  66         IDeckLinkDisplayMode* getDisplayMode()
  67         {
  68                 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( getConsumer() ) );
  69                 IDeckLinkDisplayModeIterator* iter = NULL;
  70                 IDeckLinkDisplayMode* mode = NULL;
  71                 IDeckLinkDisplayMode* result = 0;
  72
  73                 if ( m_deckLinkOutput->GetDisplayModeIterator( &iter ) == S_OK )
  74                 {
  75                         while ( !result && iter->Next( &mode ) == S_OK )
  76                         {
  77                                 m_width = mode->GetWidth();
  78                                 m_height = mode->GetHeight();
  79                                 mode->GetFrameRate( &m_duration, &m_timescale );
  80                                 m_fps = (double) m_timescale / m_duration;
  81                                 int p = mode->GetFieldDominance() == bmdProgressiveFrame;
  82                                 mlt_log_verbose( getConsumer(), "BMD mode %dx%d %.3f fps prog %d\n", m_width, m_height, m_fps, p );
  83
  84                                 if ( m_width == profile->width && p == profile->progressive
  85                                          && m_fps == mlt_profile_fps( profile )
  86                                          && ( m_height == profile->height || ( m_height == 486 && profile->height == 480 ) ) )
  87                                         result = mode;
  88                                 else
  89                                         SAFE_RELEASE( mode );
  90                         }
  91                         SAFE_RELEASE( iter );
  92                 }
  93
  94                 return result;
  95         }
  96
  97 public:
  98         mlt_consumer getConsumer()
  99                 { return &m_consumer; }
 100
 101         DeckLinkConsumer()
 102         {
 103                 m_displayMode = NULL;
 104                 m_deckLinkKeyer = NULL;
 105                 m_deckLinkOutput = NULL;
 106                 m_deckLink = NULL;
 107         }
 108
 109         ~DeckLinkConsumer()
 110         {
 111                 SAFE_RELEASE( m_displayMode );
 112                 SAFE_RELEASE( m_deckLinkKeyer );
 113                 SAFE_RELEASE( m_deckLinkOutput );
 114                 SAFE_RELEASE( m_deckLink );
 115         }
 116
 117         bool open( unsigned card = 0 )
 118         {
 119                 unsigned i = 0;
 120 #ifdef WIN32
 121                 IDeckLinkIterator* deckLinkIterator = NULL;
 122                 HRESULT result =  CoInitialize( NULL );
 123                 if ( FAILED( result ) )
 124                 {
 125                         mlt_log_error( getConsumer(), "COM initialization failed\n" );
 126                         return false;
 127                 }
 128                 result = CoCreateInstance( CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL, IID_IDeckLinkIterator, (void**) &deckLinkIterator );
 129                 if ( FAILED( result ) )
 130                 {
 131                         mlt_log_error( getConsumer(), "The DeckLink drivers not installed.\n" );
 132                         return false;
 133                 }
 134 #else
 135                 IDeckLinkIterator* deckLinkIterator = CreateDeckLinkIteratorInstance();
 136
 137                 if ( !deckLinkIterator )
 138                 {
 139                         mlt_log_error( getConsumer(), "The DeckLink drivers not installed.\n" );
 140                         return false;
 141                 }
 142 #endif
 143
 144                 // Connect to the Nth DeckLink instance
 145                 for ( i = 0; deckLinkIterator->Next( &m_deckLink ) == S_OK ; i++)
 146                 {
 147                         if( i == card )
 148                                 break;
 149                         else
 150                                 SAFE_RELEASE( m_deckLink );
 151                 }
 152                 SAFE_RELEASE( deckLinkIterator );
 153                 if ( !m_deckLink )
 154                 {
 155                         mlt_log_error( getConsumer(), "DeckLink card not found\n" );
 156                         return false;
 157                 }
 158
 159                 // Obtain the audio/video output interface (IDeckLinkOutput)
 160                 if ( m_deckLink->QueryInterface( IID_IDeckLinkOutput, (void**)&m_deckLinkOutput ) != S_OK )
 161                 {
 162                         mlt_log_error( getConsumer(), "No DeckLink cards support output\n" );
 163                         SAFE_RELEASE( m_deckLink );
 164                         return false;
 165                 }
 166
 167                 // Get the keyer interface
 168                 IDeckLinkAttributes *deckLinkAttributes = 0;
 169                 if ( m_deckLink->QueryInterface( IID_IDeckLinkAttributes, (void**) &deckLinkAttributes ) == S_OK )
 170                 {
 171 #ifdef WIN32
 172                         BOOL flag = FALSE;
 173 #else
 174                         bool flag = false;
 175 #endif
 176                         if ( deckLinkAttributes->GetFlag( BMDDeckLinkSupportsInternalKeying, &flag ) == S_OK && flag )
 177                         {
 178                                 if ( m_deckLink->QueryInterface( IID_IDeckLinkKeyer, (void**) &m_deckLinkKeyer ) != S_OK )
 179                                 {
 180                                         mlt_log_error( getConsumer(), "Failed to get keyer\n" );
 181                                         SAFE_RELEASE( m_deckLinkOutput );
 182                                         SAFE_RELEASE( m_deckLink );
 183                                         return false;
 184                                 }
 185                         }
 186                         SAFE_RELEASE( deckLinkAttributes );
 187                 }
 188
 189                 // Provide this class as a delegate to the audio and video output interfaces
 190                 m_deckLinkOutput->SetScheduledFrameCompletionCallback( this );
 191
 192                 return true;
 193         }
 194
 195
 196         void* preroll_thread()
 197         {
 198                 // preroll frames
 199                 for ( unsigned i = 0; i < m_preroll; i++ )
 200                         ScheduleNextFrame( true );
 201
 202                 // start scheduled playback
 203                 m_deckLinkOutput->StartScheduledPlayback( 0, m_timescale, 1.0 );
 204
 205                 return 0;
 206         }
 207
 208         static void* preroll_thread_proxy( void* arg )
 209         {
 210                 DeckLinkConsumer* self = static_cast< DeckLinkConsumer* >( arg );
 211                 return self->preroll_thread();
 212         }
 213
 214         bool start( unsigned preroll )
 215         {
 216                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( getConsumer() );
 217
 218                 // Initialize members
 219                 m_count = 0;
 220                 m_dropped = 0;
 221                 m_decklinkFrame = NULL;
 222                 preroll = preroll < PREROLL_MINIMUM ? PREROLL_MINIMUM : preroll;
 223                 m_channels = mlt_properties_get_int( properties, "channels" );
 224                 m_isAudio = !mlt_properties_get_int( properties, "audio_off" );
 225                 m_terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
 226
 227
 228                 m_displayMode = getDisplayMode();
 229                 if ( !m_displayMode )
 230                 {
 231                         mlt_log_error( getConsumer(), "Profile is not compatible with decklink.\n" );
 232                         return false;
 233                 }
 234
 235                 // Set the keyer
 236                 if ( m_deckLinkKeyer && ( m_isKeyer = mlt_properties_get_int( properties, "keyer" ) ) )
 237                 {
 238                         bool external = ( m_isKeyer == 2 );
 239                         double level = mlt_properties_get_double( properties, "keyer_level" );
 240
 241                         if ( m_deckLinkKeyer->Enable( external ) != S_OK )
 242                                 mlt_log_error( getConsumer(), "Failed to enable %s keyer\n",
 243                                         external ? "external" : "internal" );
 244                         m_deckLinkKeyer->SetLevel( level <= 1 ? ( level > 0 ? 255 * level : 255 ) : 255 );
 245                 }
 246                 else if ( m_deckLinkKeyer )
 247                 {
 248                         m_deckLinkKeyer->Disable();
 249                 }
 250
 251                 // Set the video output mode
 252                 if ( S_OK != m_deckLinkOutput->EnableVideoOutput( m_displayMode->GetDisplayMode(), bmdVideoOutputFlagDefault ) )
 253                 {
 254                         mlt_log_error( getConsumer(), "Failed to enable video output\n" );
 255                         return false;
 256                 }
 257
 258                 // Set the audio output mode
 259                 if ( !m_isAudio )
 260                 {
 261                         m_deckLinkOutput->DisableAudioOutput();
 262                         return true;
 263                 }
 264                 if ( S_OK != m_deckLinkOutput->EnableAudioOutput( bmdAudioSampleRate48kHz, bmdAudioSampleType16bitInteger,
 265                         m_channels, bmdAudioOutputStreamTimestamped ) )
 266                 {
 267                         mlt_log_error( getConsumer(), "Failed to enable audio output\n" );
 268                         stop();
 269                         return false;
 270                 }
 271
 272                 m_preroll = preroll;
 273                 m_reprio = false;
 274
 275                 // Do preroll in thread to ensure asynchronicity of mlt_consumer_start().
 276                 pthread_create( &m_prerollThread, NULL, preroll_thread_proxy, this );
 277
 278                 // Set the running state
 279                 mlt_properties_set_int( properties, "running", 1 );
 280
 281                 return true;
 282         }
 283
 284         bool stop()
 285         {
 286                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( getConsumer() );
 287                 bool wasRunning = !!mlt_properties_get_int( properties, "running" );
 288
 289                 // set running state is 0
 290                 mlt_properties_set_int( properties, "running", 0 );
 291                 mlt_consumer_stopped( getConsumer() );
 292
 293                 // Stop the audio and video output streams immediately
 294                 if ( m_deckLinkOutput )
 295                 {
 296                         m_deckLinkOutput->StopScheduledPlayback( 0, 0, 0 );
 297                         m_deckLinkOutput->DisableAudioOutput();
 298                         m_deckLinkOutput->DisableVideoOutput();
 299                 }
 300
 301                 // release decklink frame
 302                 SAFE_RELEASE( m_decklinkFrame );
 303
 304                 if ( wasRunning )
 305                         pthread_join( m_prerollThread, NULL );
 306
 307                 return true;
 308         }
 309
 310         void renderAudio( mlt_frame frame )
 311         {
 312                 mlt_audio_format format = mlt_audio_s16;
 313                 int frequency = bmdAudioSampleRate48kHz;
 314                 int samples = mlt_sample_calculator( m_fps, frequency, m_count );
 315                 int16_t *pcm = 0;
 316
 317                 if ( !mlt_frame_get_audio( frame, (void**) &pcm, &format, &frequency, &m_channels, &samples ) )
 318                 {
 319 #ifdef WIN32
 320                         unsigned long written = 0;
 321 #else
 322                         uint32_t written = 0;
 323 #endif
 324                         BMDTimeValue streamTime = m_count * frequency * m_duration / m_timescale;
 325                         m_deckLinkOutput->GetBufferedAudioSampleFrameCount( &written );
 326                         if ( written > (m_preroll + 1) * samples )
 327                         {
 328                                 mlt_log_verbose( getConsumer(), "renderAudio: will flush %lu audiosamples\n", written );
 329                                 m_deckLinkOutput->FlushBufferedAudioSamples();
 330                         };
 331 #ifdef WIN32
 332                         m_deckLinkOutput->ScheduleAudioSamples( pcm, samples, streamTime, frequency, (unsigned long*) &written );
 333 #else
 334                         m_deckLinkOutput->ScheduleAudioSamples( pcm, samples, streamTime, frequency, &written );
 335 #endif
 336
 337                         if ( written != (uint32_t) samples )
 338                                 mlt_log_verbose( getConsumer(), "renderAudio: samples=%d, written=%lu\n", samples, written );
 339                 }
 340         }
 341
 342         bool createFrame( IDeckLinkMutableVideoFrame** decklinkFrame )
 343         {
 344                 BMDPixelFormat format = m_isKeyer? bmdFormat8BitARGB : bmdFormat8BitYUV;
 345                 IDeckLinkMutableVideoFrame* frame = 0;
 346                 uint8_t *buffer = 0;
 347                 int stride = m_width * ( m_isKeyer? 4 : 2 );
 348
 349                 *decklinkFrame = NULL;
 350
 351                 // Generate a DeckLink video frame
 352                 if ( S_OK != m_deckLinkOutput->CreateVideoFrame( m_width, m_height,
 353                         stride, format, bmdFrameFlagDefault, &frame ) )
 354                 {
 355                         mlt_log_verbose( getConsumer(), "Failed to create video frame\n" );
 356                         stop();
 357                         return false;
 358                 }
 359
 360                 // Make the first line black for field order correction.
 361                 if ( S_OK == frame->GetBytes( (void**) &buffer ) && buffer )
 362                 {
 363                         if ( m_isKeyer )
 364                         {
 365                                 memset( buffer, 0, stride );
 366                         }
 367                         else for ( int i = 0; i < m_width; i++ )
 368                         {
 369                                 *buffer++ = 128;
 370                                 *buffer++ = 16;
 371                         }
 372                 }
 373
 374                 *decklinkFrame = frame;
 375
 376                 return true;
 377         }
 378
 379         void renderVideo( mlt_frame frame )
 380         {
 381                 mlt_image_format format = m_isKeyer? mlt_image_rgb24a : mlt_image_yuv422;
 382                 uint8_t* image = 0;
 383                 int rendered = mlt_properties_get_int( MLT_FRAME_PROPERTIES(frame), "rendered");
 384                 int height = m_height;
 385
 386                 if ( rendered && !mlt_frame_get_image( frame, &image, &format, &m_width, &height, 0 ) )
 387                 {
 388                         uint8_t* buffer = 0;
 389                         int stride = m_width * ( m_isKeyer? 4 : 2 );
 390
 391                         SAFE_RELEASE( m_decklinkFrame );
 392                         if ( createFrame( &m_decklinkFrame ) )
 393                                 m_decklinkFrame->GetBytes( (void**) &buffer );
 394
 395                         if ( buffer )
 396                         {
 397                                 int progressive = mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "progressive" );
 398
 399                                 // NTSC SDI is always 486 lines
 400                                 if ( m_height == 486 && height == 480 )
 401                                 {
 402                                         // blank first 6 lines
 403                                         if ( m_isKeyer )
 404                                         {
 405                                                 memset( buffer, 0, stride * 6 );
 406                                                 buffer += stride * 6;
 407                                         }
 408                                         else for ( int i = 0; i < m_width * 6; i++ )
 409                                         {
 410                                                 *buffer++ = 128;
 411                                                 *buffer++ = 16;
 412                                         }
 413                                 }
 414                                 if ( !m_isKeyer )
 415                                 {
 416                                         // Normal non-keyer playout - needs byte swapping
 417                                         if ( !progressive && m_displayMode->GetFieldDominance() == bmdUpperFieldFirst )
 418                                                 // convert lower field first to top field first
 419                                                 swab( (char*) image, (char*) buffer + stride, stride * ( height - 1 ) );
 420                                         else
 421                                                 swab( (char*) image, (char*) buffer, stride * height );
 422                                 }
 423                                 else if ( !mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "test_image" ) )
 424                                 {
 425                                         // Normal keyer output
 426                                         int y = height + 1;
 427                                         uint32_t* s = (uint32_t*) image;
 428                                         uint32_t* d = (uint32_t*) buffer;
 429
 430                                         if ( !progressive && m_displayMode->GetFieldDominance() == bmdUpperFieldFirst )
 431                                         {
 432                                                 // Correct field order
 433                                                 height--;
 434                                                 y--;
 435                                                 d += m_width;
 436                                         }
 437
 438                                         // Need to relocate alpha channel RGBA => ARGB
 439                                         while ( --y )
 440                                         {
 441                                                 int x = m_width + 1;
 442                                                 while ( --x )
 443                                                 {
 444                                                         *d++ = ( *s << 8 ) | ( *s >> 24 );
 445                                                         s++;
 446                                                 }
 447                                         }
 448                                 }
 449                                 else
 450                                 {
 451                                         // Keying blank frames - nullify alpha
 452                                         memset( buffer, 0, stride * height );
 453                                 }
 454                         }
 455                 }
 456                 if ( m_decklinkFrame )
 457                         m_deckLinkOutput->ScheduleVideoFrame( m_decklinkFrame, m_count * m_duration, m_duration, m_timescale );
 458
 459                 if ( !rendered )
 460                         mlt_log_verbose( getConsumer(), "dropped video frame %u\n", ++m_dropped );
 461         }
 462
 463         HRESULT render( mlt_frame frame )
 464         {
 465                 HRESULT result = S_OK;
 466
 467                 // Get the audio
 468                 double speed = mlt_properties_get_double( MLT_FRAME_PROPERTIES(frame), "_speed" );
 469                 if ( m_isAudio && speed == 1.0 )
 470                         renderAudio( frame );
 471
 472                 // Get the video
 473                 renderVideo( frame );
 474                 ++m_count;
 475
 476                 return result;
 477         }
 478
 479         // *** DeckLink API implementation of IDeckLinkVideoOutputCallback IDeckLinkAudioOutputCallback *** //
 480
 481         // IUnknown needs only a dummy implementation
 482         virtual HRESULT STDMETHODCALLTYPE QueryInterface( REFIID iid, LPVOID *ppv )
 483                 { return E_NOINTERFACE; }
 484         virtual ULONG STDMETHODCALLTYPE AddRef()
 485                 { return 1; }
 486         virtual ULONG STDMETHODCALLTYPE Release()
 487                 { return 1; }
 488
 489         /************************* DeckLink API Delegate Methods *****************************/
 490
 491         virtual HRESULT STDMETHODCALLTYPE ScheduledFrameCompleted( IDeckLinkVideoFrame* completedFrame, BMDOutputFrameCompletionResult completed )
 492         {
 493                 if( !m_reprio )
 494                 {
 495                         mlt_properties properties = MLT_CONSUMER_PROPERTIES( getConsumer() );
 496
 497                         if ( mlt_properties_get( properties, "priority" ) )
 498                         {
 499                                 int r;
 500                                 pthread_t thread;
 501                                 pthread_attr_t tattr;
 502                                 struct sched_param param;
 503
 504                                 pthread_attr_init(&tattr);
 505                                 pthread_attr_setschedpolicy(&tattr, SCHED_FIFO);
 506
 507                                 if ( !strcmp( "max", mlt_properties_get( properties, "priority" ) ) )
 508                                         param.sched_priority = sched_get_priority_max(SCHED_FIFO) - 1;
 509                                 else if ( !strcmp( "min", mlt_properties_get( properties, "priority" ) ) )
 510                                         param.sched_priority = sched_get_priority_min(SCHED_FIFO) + 1;
 511                                 else
 512                                         param.sched_priority = mlt_properties_get_int( properties, "priority" );
 513
 514                                 pthread_attr_setschedparam(&tattr, &param);
 515
 516                                 thread = pthread_self();
 517
 518                                 r = pthread_setschedparam(thread, SCHED_FIFO, &param);
 519                                 if( r )
 520                                         mlt_log_verbose( getConsumer(),
 521                                                 "ScheduledFrameCompleted: pthread_setschedparam returned %d\n", r);
 522                                 else
 523                                         mlt_log_verbose( getConsumer(),
 524                                                 "ScheduledFrameCompleted: param.sched_priority=%d\n", param.sched_priority);
 525                         };
 526
 527                         m_reprio = true;
 528                 };
 529
 530 #ifdef WIN32
 531                 unsigned long cnt;
 532 #else
 533                 uint32_t cnt;
 534 #endif
 535                 m_deckLinkOutput->GetBufferedAudioSampleFrameCount( &cnt );
 536                 if ( cnt != m_acnt )
 537                 {
 538                         mlt_log_debug( getConsumer(),
 539                                 "ScheduledFrameCompleted: GetBufferedAudioSampleFrameCount %u -> %lu, m_count=%"PRIu64"\n",
 540                                 m_acnt, cnt, m_count );
 541                         m_acnt = cnt;
 542                 }
 543
 544                 // When a video frame has been released by the API, schedule another video frame to be output
 545
 546                 // ignore handler if frame was flushed
 547                 if ( bmdOutputFrameFlushed == completed )
 548                         return S_OK;
 549
 550                 // schedule next frame
 551                 ScheduleNextFrame( false );
 552
 553                 // step forward frames counter if underrun
 554                 if ( bmdOutputFrameDisplayedLate == completed )
 555                 {
 556                         mlt_log_verbose( getConsumer(), "ScheduledFrameCompleted: bmdOutputFrameDisplayedLate == completed\n" );
 557                         m_count++;
 558                 }
 559                 if ( bmdOutputFrameDropped == completed )
 560                 {
 561                         mlt_log_verbose( getConsumer(), "ScheduledFrameCompleted: bmdOutputFrameDropped == completed\n" );
 562                         m_count++;
 563                 }
 564
 565                 return S_OK;
 566         }
 567
 568         virtual HRESULT STDMETHODCALLTYPE ScheduledPlaybackHasStopped()
 569         {
 570                 return mlt_consumer_is_stopped( getConsumer() ) ? S_FALSE : S_OK;
 571         }
 572
 573
 574         void ScheduleNextFrame( bool preroll )
 575         {
 576                 // get the consumer
 577                 mlt_consumer consumer = getConsumer();
 578
 579                 // Get the properties
 580                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 581
 582                 // Frame and size
 583                 mlt_frame frame = NULL;
 584
 585                 if( mlt_properties_get_int( properties, "running" ) || preroll )
 586                 {
 587                         frame = mlt_consumer_rt_frame( consumer );
 588                         if ( frame != NULL )
 589                         {
 590                                 render( frame );
 591
 592                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 593
 594                                 // terminate on pause
 595                                 if ( m_terminate_on_pause &&
 596                                         mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0 )
 597                                         stop();
 598
 599                                 mlt_frame_close( frame );
 600                         }
 601                 }
 602         }
 603 };
 604
 605 /** Start the consumer.
 606  */
 607
 608 static int start( mlt_consumer consumer )
 609 {
 610         // Get the properties
 611         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 612         DeckLinkConsumer* decklink = (DeckLinkConsumer*) consumer->child;
 613         return decklink->start( mlt_properties_get_int( properties, "preroll" ) ) ? 0 : 1;
 614 }
 615
 616 /** Stop the consumer.
 617  */
 618
 619 static int stop( mlt_consumer consumer )
 620 {
 621         // Get the properties
 622         DeckLinkConsumer* decklink = (DeckLinkConsumer*) consumer->child;
 623         return decklink->stop();
 624 }
 625
 626 /** Determine if the consumer is stopped.
 627  */
 628
 629 static int is_stopped( mlt_consumer consumer )
 630 {
 631         // Get the properties
 632         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 633         return !mlt_properties_get_int( properties, "running" );
 634 }
 635
 636 /** Close the consumer.
 637  */
 638
 639 static void close( mlt_consumer consumer )
 640 {
 641         // Stop the consumer
 642         mlt_consumer_stop( consumer );
 643
 644         // Close the parent
 645         consumer->close = NULL;
 646         mlt_consumer_close( consumer );
 647
 648         // Free the memory
 649         delete (DeckLinkConsumer*) consumer->child;
 650 }
 651
 652 extern "C" {
 653
 654 // Listen for the list_devices property to be set
 655 static void on_property_changed( void*, mlt_properties properties, const char *name )
 656 {
 657         IDeckLinkIterator* decklinkIterator = NULL;
 658         IDeckLink* decklink = NULL;
 659         IDeckLinkInput* decklinkOutput = NULL;
 660         int i = 0;
 661
 662         if ( name && !strcmp( name, "list_devices" ) )
 663                 mlt_event_block( (mlt_event) mlt_properties_get_data( properties, "list-devices-event", NULL ) );
 664         else
 665                 return;
 666
 667 #ifdef WIN32
 668         if ( FAILED( CoInitialize( NULL ) ) )
 669                 return;
 670         if ( FAILED( CoCreateInstance( CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL, IID_IDeckLinkIterator, (void**) &decklinkIterator ) ) )
 671                 return;
 672 #else
 673         if ( !( decklinkIterator = CreateDeckLinkIteratorInstance() ) )
 674                 return;
 675 #endif
 676         for ( ; decklinkIterator->Next( &decklink ) == S_OK; i++ )
 677         {
 678                 if ( decklink->QueryInterface( IID_IDeckLinkOutput, (void**) &decklinkOutput ) == S_OK )
 679                 {
 680                         char *name = NULL;
 681                         if ( decklink->GetModelName( (const char**) &name ) == S_OK )
 682                         {
 683                                 const char *format = "device.%d";
 684                                 char *key = (char*) calloc( 1, strlen( format ) + 1 );
 685
 686                                 sprintf( key, format, i );
 687                                 mlt_properties_set( properties, key, name );
 688                                 free( key );
 689                                 free( name );
 690                         }
 691                         SAFE_RELEASE( decklinkOutput );
 692                 }
 693                 SAFE_RELEASE( decklink );
 694         }
 695         SAFE_RELEASE( decklinkIterator );
 696         mlt_properties_set_int( properties, "devices", i );
 697 }
 698
 699 /** Initialise the consumer.
 700  */
 701
 702 mlt_consumer consumer_decklink_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
 703 {
 704         // Allocate the consumer
 705         DeckLinkConsumer* decklink = new DeckLinkConsumer();
 706         mlt_consumer consumer = NULL;
 707
 708         // If allocated
 709         if ( decklink && !mlt_consumer_init( decklink->getConsumer(), decklink, profile ) )
 710         {
 711                 // If initialises without error
 712                 if ( decklink->open( arg? atoi(arg) : 0 ) )
 713                 {
 714                         consumer = decklink->getConsumer();
 715                         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 716
 717                         // Setup callbacks
 718                         consumer->close = close;
 719                         consumer->start = start;
 720                         consumer->stop = stop;
 721                         consumer->is_stopped = is_stopped;
 722                         mlt_properties_set( properties, "deinterlace_method", "onefield" );
 723
 724                         mlt_event event = mlt_events_listen( properties, properties, "property-changed", (mlt_listener) on_property_changed );
 725                         mlt_properties_set_data( properties, "list-devices-event", event, 0, NULL, NULL );
 726                 }
 727         }
 728
 729         // Return consumer
 730         return consumer;
 731 }
 732
 733 extern mlt_producer producer_decklink_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg );
 734
 735 static mlt_properties metadata( mlt_service_type type, const char *id, void *data )
 736 {
 737         char file[ PATH_MAX ];
 738         const char *service_type = NULL;
 739         switch ( type )
 740         {
 741                 case consumer_type:
 742                         service_type = "consumer";
 743                         break;
 744                 case producer_type:
 745                         service_type = "producer";
 746                         break;
 747                 default:
 748                         return NULL;
 749         }
 750         snprintf( file, PATH_MAX, "%s/decklink/%s_%s.yml", mlt_environment( "MLT_DATA" ), service_type, id );
 751         return mlt_properties_parse_yaml( file );
 752 }
 753
 754 MLT_REPOSITORY
 755 {
 756         MLT_REGISTER( consumer_type, "decklink", consumer_decklink_init );
 757         MLT_REGISTER( producer_type, "decklink", producer_decklink_init );
 758         MLT_REGISTER_METADATA( consumer_type, "decklink", metadata, NULL );
 759         MLT_REGISTER_METADATA( producer_type, "decklink", metadata, NULL );
 760 }
 761
 762 } // extern C