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

   1 /*
   2  * producer_decklink.c -- input from Blackmagic Design DeckLink
   3  * Copyright (C) 2011 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 #include <framework/mlt.h>
  21 #include <stdlib.h>
  22 #include <pthread.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include "DeckLinkAPI.h"
  26
  27 class DeckLinkProducer
  28         : public IDeckLinkInputCallback
  29 {
  30 private:
  31         mlt_producer_s   m_producer;
  32         IDeckLink*       m_decklink;
  33         IDeckLinkInput*  m_decklinkInput;
  34         mlt_deque        m_queue;
  35         pthread_mutex_t  m_mutex;
  36         pthread_cond_t   m_condition;
  37         bool             m_started;
  38         int              m_dropped;
  39
  40         BMDDisplayMode getDisplayMode( mlt_profile profile )
  41         {
  42                 IDeckLinkDisplayModeIterator* iter;
  43                 IDeckLinkDisplayMode* mode;
  44                 BMDDisplayMode result = bmdDisplayModeNotSupported;
  45
  46                 if ( m_decklinkInput->GetDisplayModeIterator( &iter ) == S_OK )
  47                 {
  48                         while ( !result && iter->Next( &mode ) == S_OK )
  49                         {
  50                                 int width = mode->GetWidth();
  51                                 int height = mode->GetHeight();
  52                                 BMDTimeValue duration;
  53                                 BMDTimeScale timescale;
  54                                 mode->GetFrameRate( &duration, &timescale );
  55                                 double fps = (double) timescale / duration;
  56                                 int p = mode->GetFieldDominance() == bmdProgressiveFrame;
  57                                 mlt_log_verbose( getProducer(), "BMD mode %dx%d %.3f fps prog %d\n", width, height, fps, p );
  58
  59                                 if ( width == profile->width && height == profile->height && p == profile->progressive
  60                                          && fps == mlt_profile_fps( profile ) )
  61                                         result = mode->GetDisplayMode();
  62                         }
  63                 }
  64
  65                 return result;
  66         }
  67
  68 public:
  69
  70         mlt_producer getProducer()
  71                 { return &m_producer; }
  72
  73         ~DeckLinkProducer()
  74         {
  75                 if ( m_decklinkInput )
  76                         m_decklinkInput->Release();
  77                 if ( m_decklink )
  78                         m_decklink->Release();
  79                 if ( m_queue )
  80                 {
  81                         stop();
  82                         mlt_deque_close( m_queue );
  83                         pthread_mutex_destroy( &m_mutex );
  84                         pthread_cond_destroy( &m_condition );
  85                 }
  86         }
  87
  88         bool open( mlt_profile profile, unsigned card =  0 )
  89         {
  90                 IDeckLinkIterator* decklinkIterator = CreateDeckLinkIteratorInstance();
  91                 try
  92                 {
  93                         if ( !decklinkIterator )
  94                                 throw "The DeckLink drivers are not installed.";
  95
  96                         // Connect to the Nth DeckLink instance
  97                         unsigned i = 0;
  98                         do {
  99                                 if ( decklinkIterator->Next( &m_decklink ) != S_OK )
 100                                         throw "DeckLink card not found.";
 101                         } while ( ++i <= card );
 102                         decklinkIterator->Release();
 103
 104                         // Get the input interface
 105                         if ( m_decklink->QueryInterface( IID_IDeckLinkInput, (void**) &m_decklinkInput ) != S_OK )
 106                                 throw "No DeckLink cards support input.";
 107
 108                         // Provide this class as a delegate to the input callback
 109                         m_decklinkInput->SetCallback( this );
 110
 111                         // Initialize other members
 112                         pthread_mutex_init( &m_mutex, NULL );
 113                         pthread_cond_init( &m_condition, NULL );
 114                         m_queue = mlt_deque_init();
 115                         m_started = false;
 116                         m_dropped = 0;
 117                 }
 118                 catch ( const char *error )
 119                 {
 120                         if ( decklinkIterator )
 121                                 decklinkIterator->Release();
 122                         mlt_log_error( getProducer(), "%s\n", error );
 123                         return false;
 124                 }
 125                 return true;
 126         }
 127
 128         bool start( mlt_profile profile = 0 )
 129         {
 130                 if ( m_started )
 131                         return false;
 132                 try
 133                 {
 134                         if ( !profile )
 135                                 profile = mlt_service_profile( MLT_PRODUCER_SERVICE( getProducer() ) );
 136
 137                         // Get the display mode
 138                         BMDDisplayMode displayMode = getDisplayMode( profile );
 139                         if ( displayMode == bmdDisplayModeNotSupported )
 140                                 throw "Profile is not compatible with decklink.";
 141
 142                         // Enable video capture
 143                         BMDPixelFormat pixelFormat = bmdFormat8BitYUV;
 144                         BMDVideoInputFlags flags = bmdVideoInputFlagDefault;
 145                         if ( S_OK != m_decklinkInput->EnableVideoInput( displayMode, pixelFormat, flags ) )
 146                                 throw "Failed to enable video capture.";
 147
 148                         // Enable audio capture
 149                         BMDAudioSampleRate sampleRate = bmdAudioSampleRate48kHz;
 150                         BMDAudioSampleType sampleType = bmdAudioSampleType16bitInteger;
 151                         int channels = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "channels" );
 152                         if ( S_OK != m_decklinkInput->EnableAudioInput( sampleRate, sampleType, channels ) )
 153                                 throw "Failed to enable audio capture.";
 154
 155                         // Start capture
 156                         m_dropped = 0;
 157                         mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "dropped", m_dropped );
 158                         m_started = m_decklinkInput->StartStreams() == S_OK;
 159                         if ( !m_started )
 160                                 throw "Failed to start capture.";
 161                 }
 162                 catch ( const char *error )
 163                 {
 164                         m_decklinkInput->DisableVideoInput();
 165                         mlt_log_error( getProducer(), "%s\n", error );
 166                         return false;
 167                 }
 168                 return true;
 169         }
 170
 171         void stop()
 172         {
 173                 if ( m_started )
 174                         return;
 175
 176                 // Release the wait in getFrame
 177                 pthread_mutex_lock( &m_mutex );
 178                 pthread_cond_broadcast( &m_condition );
 179                 pthread_mutex_unlock( &m_mutex );
 180
 181                 m_decklinkInput->StopStreams();
 182
 183                 // Cleanup queue
 184                 pthread_mutex_lock( &m_mutex );
 185                 while ( mlt_frame frame = (mlt_frame) mlt_deque_pop_back( m_queue ) )
 186                         mlt_frame_close( frame );
 187                 pthread_mutex_unlock( &m_mutex );
 188
 189                 m_started = false;
 190         }
 191
 192         mlt_frame getFrame()
 193         {
 194                 mlt_frame frame = NULL;
 195
 196                 // Wait if queue is empty
 197                 pthread_mutex_lock( &m_mutex );
 198                 while ( mlt_deque_count( m_queue ) < 1 )
 199                         pthread_cond_wait( &m_condition, &m_mutex );
 200
 201                 // Get the first frame from the queue
 202                 frame = ( mlt_frame ) mlt_deque_pop_front( m_queue );
 203                 pthread_mutex_unlock( &m_mutex );
 204
 205                 // Set frame timestamp and properties
 206                 mlt_profile profile = mlt_service_profile( MLT_PRODUCER_SERVICE( getProducer() ) );
 207                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 208                 mlt_properties_set_int( properties, "progressive", profile->progressive );
 209                 mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile ) );
 210                 mlt_properties_set_int( properties, "width", profile->width );
 211                 mlt_properties_set_int( properties, "real_width", profile->width );
 212                 mlt_properties_set_int( properties, "height", profile->height );
 213                 mlt_properties_set_int( properties, "real_height", profile->height );
 214                 mlt_properties_set_int( properties, "format", mlt_image_yuv422 );
 215                 mlt_properties_set_int( properties, "audio_frequency", 48000 );
 216                 mlt_properties_set_int( properties, "audio_channels",
 217                         mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "channels" ) );
 218
 219                 return frame;
 220         }
 221
 222         // *** DeckLink API implementation of IDeckLinkInputCallback *** //
 223
 224         // IUnknown needs only a dummy implementation
 225         virtual HRESULT STDMETHODCALLTYPE QueryInterface( REFIID iid, LPVOID *ppv )
 226                 { return E_NOINTERFACE; }
 227         virtual ULONG STDMETHODCALLTYPE AddRef()
 228                 { return 1; }
 229         virtual ULONG STDMETHODCALLTYPE Release()
 230                 { return 1; }
 231
 232         /************************* DeckLink API Delegate Methods *****************************/
 233
 234         virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(
 235                         IDeckLinkVideoInputFrame* video,
 236                         IDeckLinkAudioInputPacket* audio )
 237         {
 238                 // Create mlt_frame
 239                 mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( getProducer() ) );
 240
 241                 // Copy video
 242                 if ( video )
 243                 {
 244                         if ( !( video->GetFlags() & bmdFrameHasNoInputSource ) )
 245                         {
 246                                 int size = video->GetRowBytes() * video->GetHeight();
 247                                 void* image = mlt_pool_alloc( size );
 248                                 void* buffer = 0;
 249
 250                                 video->GetBytes( &buffer );
 251                                 if ( image && buffer )
 252                                 {
 253                                         swab( buffer, image, size );
 254                                         mlt_frame_set_image( frame, (uint8_t*) image, size, mlt_pool_release );
 255                                 }
 256                                 else if ( image )
 257                                 {
 258                                         mlt_log_verbose( getProducer(), "no video\n" );
 259                                         mlt_pool_release( image );
 260                                 }
 261                         }
 262                         else
 263                         {
 264                                 mlt_log_verbose( getProducer(), "no signal\n" );
 265                                 mlt_frame_close( frame );
 266                                 frame = 0;
 267                         }
 268                 }
 269                 else
 270                 {
 271                         mlt_log_verbose( getProducer(), "no video\n" );
 272                         mlt_frame_close( frame );
 273                         frame = 0;
 274                 }
 275
 276                 // Copy audio
 277                 if ( frame && audio )
 278                 {
 279                         int channels = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "channels" );
 280                         int size = audio->GetSampleFrameCount() * channels * sizeof(int16_t);
 281                         mlt_audio_format format = mlt_audio_s16;
 282                         void* pcm = mlt_pool_alloc( size );
 283                         void* buffer = 0;
 284
 285                         audio->GetBytes( &buffer );
 286                         if ( buffer )
 287                         {
 288                                 memcpy( pcm, buffer, size );
 289                                 mlt_frame_set_audio( frame, pcm, format, size, mlt_pool_release );
 290                                 mlt_properties_set_int( MLT_FRAME_PROPERTIES(frame), "audio_samples", audio->GetSampleFrameCount() );
 291                         }
 292                         else
 293                         {
 294                                 mlt_log_verbose( getProducer(), "no audio\n" );
 295                                 mlt_pool_release( pcm );
 296                         }
 297                 }
 298                 else
 299                 {
 300                         mlt_log_verbose( getProducer(), "no audio\n" );
 301                 }
 302
 303                 // Put frame in queue
 304                 if ( frame )
 305                 {
 306                         int queueMax = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "buffer" );
 307                         pthread_mutex_lock( &m_mutex );
 308                         if ( mlt_deque_count( m_queue ) < queueMax )
 309                         {
 310                                 mlt_deque_push_back( m_queue, frame );
 311                                 pthread_cond_broadcast( &m_condition );
 312                         }
 313                         else
 314                         {
 315                                 mlt_frame_close( frame );
 316                                 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "dropped", ++m_dropped );
 317                                 mlt_log_warning( getProducer(), "frame dropped %d\n", m_dropped );
 318                         }
 319                         pthread_mutex_unlock( &m_mutex );
 320                 }
 321
 322                 return S_OK;
 323         }
 324
 325         virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(
 326                         BMDVideoInputFormatChangedEvents events,
 327                         IDeckLinkDisplayMode* mode,
 328                         BMDDetectedVideoInputFormatFlags flags )
 329         {
 330                 return S_OK;
 331         }
 332 };
 333
 334 static int get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
 335 {
 336         return mlt_frame_get_audio( frame, (void**) buffer, format, frequency, channels, samples );
 337 }
 338
 339 static int get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 340 {
 341         return mlt_frame_get_image( frame, buffer, format, width, height, writable );
 342 }
 343
 344 static int get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 345 {
 346         DeckLinkProducer* decklink = (DeckLinkProducer*) producer->child;
 347
 348         // Get the next frame from the decklink object
 349         *frame = decklink->getFrame();
 350
 351         // Calculate the next timecode
 352         mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 353         mlt_producer_prepare_next( producer );
 354
 355         // Add audio and video getters
 356         mlt_frame_push_audio( *frame, (void*) get_audio );
 357         mlt_frame_push_get_image( *frame, get_image );
 358
 359         return 0;
 360 }
 361
 362 static void producer_close( mlt_producer producer )
 363 {
 364         producer->close = NULL;
 365         mlt_producer_close( producer );
 366         delete (DeckLinkProducer*) producer->child;
 367 }
 368
 369 extern "C" {
 370
 371 /** Initialise the producer.
 372  */
 373
 374 mlt_producer producer_decklink_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
 375 {
 376         // Allocate the producer
 377         DeckLinkProducer* decklink = new DeckLinkProducer();
 378         mlt_producer producer = NULL;
 379
 380         // If allocated and initializes
 381         if ( decklink && !mlt_producer_init( decklink->getProducer(), decklink ) )
 382         {
 383                 if ( decklink->open( profile, arg? atoi( arg ) : 0 ) )
 384                 {
 385                         producer = decklink->getProducer();
 386
 387                         // Set callbacks
 388                         producer->close = (mlt_destructor) producer_close;
 389                         producer->get_frame = get_frame;
 390
 391                         // Set properties
 392                         mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "resource", arg );
 393                         mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( producer ), "channels", 2 );
 394                         mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( producer ), "buffer", 25 );
 395
 396                         // Start immediately
 397                         if ( !decklink->start( profile ) )
 398                         {
 399                                 producer_close( producer );
 400                                 producer = NULL;
 401                         }
 402                 }
 403         }
 404
 405         return producer;
 406 }
 407
 408 }