2 * producer_decklink.c -- input from Blackmagic Design DeckLink
3 * Copyright (C) 2011 Dan Dennedy <dan@dennedy.org>
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.
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.
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
20 #include <framework/mlt.h>
27 #include "DeckLinkAPI.h"
29 class DeckLinkProducer
30 : public IDeckLinkInputCallback
33 mlt_producer_s m_producer;
34 IDeckLink* m_decklink;
35 IDeckLinkInput* m_decklinkInput;
37 pthread_mutex_t m_mutex;
38 pthread_cond_t m_condition;
42 BMDDisplayMode getDisplayMode( mlt_profile profile )
44 IDeckLinkDisplayModeIterator* iter;
45 IDeckLinkDisplayMode* mode;
46 BMDDisplayMode result = bmdDisplayModeNotSupported;
48 if ( m_decklinkInput->GetDisplayModeIterator( &iter ) == S_OK )
50 while ( !result && iter->Next( &mode ) == S_OK )
52 int width = mode->GetWidth();
53 int height = mode->GetHeight();
54 BMDTimeValue duration;
55 BMDTimeScale timescale;
56 mode->GetFrameRate( &duration, ×cale );
57 double fps = (double) timescale / duration;
58 int p = mode->GetFieldDominance() == bmdProgressiveFrame;
59 mlt_log_verbose( getProducer(), "BMD mode %dx%d %.3f fps prog %d\n", width, height, fps, p );
61 if ( width == profile->width && height == profile->height && p == profile->progressive
62 && fps == mlt_profile_fps( profile ) )
63 result = mode->GetDisplayMode();
72 mlt_producer getProducer()
73 { return &m_producer; }
77 if ( m_decklinkInput )
78 m_decklinkInput->Release();
80 m_decklink->Release();
84 mlt_deque_close( m_queue );
85 pthread_mutex_destroy( &m_mutex );
86 pthread_cond_destroy( &m_condition );
90 bool open( mlt_profile profile, unsigned card = 0 )
92 IDeckLinkIterator* decklinkIterator = CreateDeckLinkIteratorInstance();
95 if ( !decklinkIterator )
96 throw "The DeckLink drivers are not installed.";
98 // Connect to the Nth DeckLink instance
101 if ( decklinkIterator->Next( &m_decklink ) != S_OK )
102 throw "DeckLink card not found.";
103 } while ( ++i <= card );
104 decklinkIterator->Release();
106 // Get the input interface
107 if ( m_decklink->QueryInterface( IID_IDeckLinkInput, (void**) &m_decklinkInput ) != S_OK )
108 throw "No DeckLink cards support input.";
110 // Provide this class as a delegate to the input callback
111 m_decklinkInput->SetCallback( this );
113 // Initialize other members
114 pthread_mutex_init( &m_mutex, NULL );
115 pthread_cond_init( &m_condition, NULL );
116 m_queue = mlt_deque_init();
120 catch ( const char *error )
122 if ( decklinkIterator )
123 decklinkIterator->Release();
124 mlt_log_error( getProducer(), "%s\n", error );
130 bool start( mlt_profile profile = 0 )
137 profile = mlt_service_profile( MLT_PRODUCER_SERVICE( getProducer() ) );
139 // Get the display mode
140 BMDDisplayMode displayMode = getDisplayMode( profile );
141 if ( displayMode == bmdDisplayModeNotSupported )
142 throw "Profile is not compatible with decklink.";
144 // Enable video capture
145 BMDPixelFormat pixelFormat = bmdFormat8BitYUV;
146 BMDVideoInputFlags flags = bmdVideoInputFlagDefault;
147 if ( S_OK != m_decklinkInput->EnableVideoInput( displayMode, pixelFormat, flags ) )
148 throw "Failed to enable video capture.";
150 // Enable audio capture
151 BMDAudioSampleRate sampleRate = bmdAudioSampleRate48kHz;
152 BMDAudioSampleType sampleType = bmdAudioSampleType16bitInteger;
153 int channels = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "channels" );
154 if ( S_OK != m_decklinkInput->EnableAudioInput( sampleRate, sampleType, channels ) )
155 throw "Failed to enable audio capture.";
159 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "dropped", m_dropped );
160 m_started = m_decklinkInput->StartStreams() == S_OK;
162 throw "Failed to start capture.";
164 catch ( const char *error )
166 m_decklinkInput->DisableVideoInput();
167 mlt_log_error( getProducer(), "%s\n", error );
178 // Release the wait in getFrame
179 pthread_mutex_lock( &m_mutex );
180 pthread_cond_broadcast( &m_condition );
181 pthread_mutex_unlock( &m_mutex );
183 m_decklinkInput->StopStreams();
186 pthread_mutex_lock( &m_mutex );
187 while ( mlt_frame frame = (mlt_frame) mlt_deque_pop_back( m_queue ) )
188 mlt_frame_close( frame );
189 pthread_mutex_unlock( &m_mutex );
196 mlt_frame frame = NULL;
200 // Wait if queue is empty
201 pthread_mutex_lock( &m_mutex );
202 while ( mlt_deque_count( m_queue ) < 1 )
204 // Wait up to twice frame duration
205 gettimeofday( &now, NULL );
206 tm.tv_sec = now.tv_sec;
207 now.tv_usec += 2000000 / mlt_producer_get_fps( getProducer() );
208 tm.tv_nsec = now.tv_usec * 1000;
209 if ( pthread_cond_timedwait( &m_condition, &m_mutex, &tm ) )
210 // Stop waiting if error (timed out)
214 // Get the first frame from the queue
215 frame = ( mlt_frame ) mlt_deque_pop_front( m_queue );
216 pthread_mutex_unlock( &m_mutex );
218 // Set frame timestamp and properties
221 mlt_profile profile = mlt_service_profile( MLT_PRODUCER_SERVICE( getProducer() ) );
222 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
223 mlt_properties_set_int( properties, "progressive", profile->progressive );
224 mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile ) );
225 mlt_properties_set_int( properties, "width", profile->width );
226 mlt_properties_set_int( properties, "real_width", profile->width );
227 mlt_properties_set_int( properties, "height", profile->height );
228 mlt_properties_set_int( properties, "real_height", profile->height );
229 mlt_properties_set_int( properties, "format", mlt_image_yuv422 );
230 mlt_properties_set_int( properties, "audio_frequency", 48000 );
231 mlt_properties_set_int( properties, "audio_channels",
232 mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "channels" ) );
237 // *** DeckLink API implementation of IDeckLinkInputCallback *** //
239 // IUnknown needs only a dummy implementation
240 virtual HRESULT STDMETHODCALLTYPE QueryInterface( REFIID iid, LPVOID *ppv )
241 { return E_NOINTERFACE; }
242 virtual ULONG STDMETHODCALLTYPE AddRef()
244 virtual ULONG STDMETHODCALLTYPE Release()
247 /************************* DeckLink API Delegate Methods *****************************/
249 virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(
250 IDeckLinkVideoInputFrame* video,
251 IDeckLinkAudioInputPacket* audio )
254 mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( getProducer() ) );
259 if ( !( video->GetFlags() & bmdFrameHasNoInputSource ) )
261 int size = video->GetRowBytes() * video->GetHeight();
262 void* image = mlt_pool_alloc( size );
265 video->GetBytes( &buffer );
266 if ( image && buffer )
268 swab( buffer, image, size );
269 mlt_frame_set_image( frame, (uint8_t*) image, size, mlt_pool_release );
273 mlt_log_verbose( getProducer(), "no video\n" );
274 mlt_pool_release( image );
279 mlt_log_verbose( getProducer(), "no signal\n" );
280 mlt_frame_close( frame );
286 mlt_log_verbose( getProducer(), "no video\n" );
287 mlt_frame_close( frame );
292 if ( frame && audio )
294 int channels = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "channels" );
295 int size = audio->GetSampleFrameCount() * channels * sizeof(int16_t);
296 mlt_audio_format format = mlt_audio_s16;
297 void* pcm = mlt_pool_alloc( size );
300 audio->GetBytes( &buffer );
303 memcpy( pcm, buffer, size );
304 mlt_frame_set_audio( frame, pcm, format, size, mlt_pool_release );
305 mlt_properties_set_int( MLT_FRAME_PROPERTIES(frame), "audio_samples", audio->GetSampleFrameCount() );
309 mlt_log_verbose( getProducer(), "no audio\n" );
310 mlt_pool_release( pcm );
315 mlt_log_verbose( getProducer(), "no audio\n" );
318 // Put frame in queue
321 int queueMax = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "buffer" );
322 pthread_mutex_lock( &m_mutex );
323 if ( mlt_deque_count( m_queue ) < queueMax )
325 mlt_deque_push_back( m_queue, frame );
326 pthread_cond_broadcast( &m_condition );
330 mlt_frame_close( frame );
331 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "dropped", ++m_dropped );
332 mlt_log_warning( getProducer(), "frame dropped %d\n", m_dropped );
334 pthread_mutex_unlock( &m_mutex );
340 virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(
341 BMDVideoInputFormatChangedEvents events,
342 IDeckLinkDisplayMode* mode,
343 BMDDetectedVideoInputFormatFlags flags )
349 static int get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
351 return mlt_frame_get_audio( frame, (void**) buffer, format, frequency, channels, samples );
354 static int get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
356 return mlt_frame_get_image( frame, buffer, format, width, height, writable );
359 static int get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
361 DeckLinkProducer* decklink = (DeckLinkProducer*) producer->child;
363 // Get the next frame from the decklink object
364 *frame = decklink->getFrame();
366 *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
368 // Calculate the next timecode
369 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
370 mlt_producer_prepare_next( producer );
372 // Add audio and video getters
373 mlt_frame_push_audio( *frame, (void*) get_audio );
374 mlt_frame_push_get_image( *frame, get_image );
379 static void producer_close( mlt_producer producer )
381 producer->close = NULL;
382 mlt_producer_close( producer );
383 delete (DeckLinkProducer*) producer->child;
388 /** Initialise the producer.
391 mlt_producer producer_decklink_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
393 // Allocate the producer
394 DeckLinkProducer* decklink = new DeckLinkProducer();
395 mlt_producer producer = NULL;
397 // If allocated and initializes
398 if ( decklink && !mlt_producer_init( decklink->getProducer(), decklink ) )
400 if ( decklink->open( profile, arg? atoi( arg ) : 0 ) )
402 producer = decklink->getProducer();
403 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
406 producer->close = (mlt_destructor) producer_close;
407 producer->get_frame = get_frame;
410 mlt_properties_set( properties, "resource", arg? arg : "0" );
411 mlt_properties_set_int( properties, "channels", 2 );
412 mlt_properties_set_int( properties, "buffer", 25 );
413 mlt_properties_set_int( properties, "length", INT_MAX );
414 mlt_properties_set_int( properties, "out", INT_MAX - 1 );
415 mlt_properties_set( properties, "eof", "loop" );
418 if ( !decklink->start( profile ) )
420 producer_close( producer );