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