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>
26 #include "DeckLinkAPI.h"
28 class DeckLinkProducer
29 : public IDeckLinkInputCallback
32 mlt_producer_s m_producer;
33 IDeckLink* m_decklink;
34 IDeckLinkInput* m_decklinkInput;
36 pthread_mutex_t m_mutex;
37 pthread_cond_t m_condition;
41 BMDDisplayMode getDisplayMode( mlt_profile profile )
43 IDeckLinkDisplayModeIterator* iter;
44 IDeckLinkDisplayMode* mode;
45 BMDDisplayMode result = bmdDisplayModeNotSupported;
47 if ( m_decklinkInput->GetDisplayModeIterator( &iter ) == S_OK )
49 while ( !result && iter->Next( &mode ) == S_OK )
51 int width = mode->GetWidth();
52 int height = mode->GetHeight();
53 BMDTimeValue duration;
54 BMDTimeScale timescale;
55 mode->GetFrameRate( &duration, ×cale );
56 double fps = (double) timescale / duration;
57 int p = mode->GetFieldDominance() == bmdProgressiveFrame;
58 mlt_log_verbose( getProducer(), "BMD mode %dx%d %.3f fps prog %d\n", width, height, fps, p );
60 if ( width == profile->width && height == profile->height && p == profile->progressive
61 && fps == mlt_profile_fps( profile ) )
62 result = mode->GetDisplayMode();
71 mlt_producer getProducer()
72 { return &m_producer; }
76 if ( m_decklinkInput )
77 m_decklinkInput->Release();
79 m_decklink->Release();
83 mlt_deque_close( m_queue );
84 pthread_mutex_destroy( &m_mutex );
85 pthread_cond_destroy( &m_condition );
89 bool open( mlt_profile profile, unsigned card = 0 )
91 IDeckLinkIterator* decklinkIterator = CreateDeckLinkIteratorInstance();
94 if ( !decklinkIterator )
95 throw "The DeckLink drivers are not installed.";
97 // Connect to the Nth DeckLink instance
100 if ( decklinkIterator->Next( &m_decklink ) != S_OK )
101 throw "DeckLink card not found.";
102 } while ( ++i <= card );
103 decklinkIterator->Release();
105 // Get the input interface
106 if ( m_decklink->QueryInterface( IID_IDeckLinkInput, (void**) &m_decklinkInput ) != S_OK )
107 throw "No DeckLink cards support input.";
109 // Provide this class as a delegate to the input callback
110 m_decklinkInput->SetCallback( this );
112 // Initialize other members
113 pthread_mutex_init( &m_mutex, NULL );
114 pthread_cond_init( &m_condition, NULL );
115 m_queue = mlt_deque_init();
119 catch ( const char *error )
121 if ( decklinkIterator )
122 decklinkIterator->Release();
123 mlt_log_error( getProducer(), "%s\n", error );
129 bool start( mlt_profile profile = 0 )
136 profile = mlt_service_profile( MLT_PRODUCER_SERVICE( getProducer() ) );
138 // Get the display mode
139 BMDDisplayMode displayMode = getDisplayMode( profile );
140 if ( displayMode == bmdDisplayModeNotSupported )
141 throw "Profile is not compatible with decklink.";
143 // Enable video capture
144 BMDPixelFormat pixelFormat = bmdFormat8BitYUV;
145 BMDVideoInputFlags flags = bmdVideoInputFlagDefault;
146 if ( S_OK != m_decklinkInput->EnableVideoInput( displayMode, pixelFormat, flags ) )
147 throw "Failed to enable video capture.";
149 // Enable audio capture
150 BMDAudioSampleRate sampleRate = bmdAudioSampleRate48kHz;
151 BMDAudioSampleType sampleType = bmdAudioSampleType16bitInteger;
152 int channels = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "channels" );
153 if ( S_OK != m_decklinkInput->EnableAudioInput( sampleRate, sampleType, channels ) )
154 throw "Failed to enable audio capture.";
158 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "dropped", m_dropped );
159 m_started = m_decklinkInput->StartStreams() == S_OK;
161 throw "Failed to start capture.";
163 catch ( const char *error )
165 m_decklinkInput->DisableVideoInput();
166 mlt_log_error( getProducer(), "%s\n", error );
177 // Release the wait in getFrame
178 pthread_mutex_lock( &m_mutex );
179 pthread_cond_broadcast( &m_condition );
180 pthread_mutex_unlock( &m_mutex );
182 m_decklinkInput->StopStreams();
185 pthread_mutex_lock( &m_mutex );
186 while ( mlt_frame frame = (mlt_frame) mlt_deque_pop_back( m_queue ) )
187 mlt_frame_close( frame );
188 pthread_mutex_unlock( &m_mutex );
195 mlt_frame frame = NULL;
197 // Wait if queue is empty
198 pthread_mutex_lock( &m_mutex );
199 while ( mlt_deque_count( m_queue ) < 1 )
200 pthread_cond_wait( &m_condition, &m_mutex );
202 // Get the first frame from the queue
203 frame = ( mlt_frame ) mlt_deque_pop_front( m_queue );
204 pthread_mutex_unlock( &m_mutex );
206 // Set frame timestamp and properties
207 mlt_profile profile = mlt_service_profile( MLT_PRODUCER_SERVICE( getProducer() ) );
208 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
209 mlt_properties_set_int( properties, "progressive", profile->progressive );
210 mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile ) );
211 mlt_properties_set_int( properties, "width", profile->width );
212 mlt_properties_set_int( properties, "real_width", profile->width );
213 mlt_properties_set_int( properties, "height", profile->height );
214 mlt_properties_set_int( properties, "real_height", profile->height );
215 mlt_properties_set_int( properties, "format", mlt_image_yuv422 );
216 mlt_properties_set_int( properties, "audio_frequency", 48000 );
217 mlt_properties_set_int( properties, "audio_channels",
218 mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "channels" ) );
223 // *** DeckLink API implementation of IDeckLinkInputCallback *** //
225 // IUnknown needs only a dummy implementation
226 virtual HRESULT STDMETHODCALLTYPE QueryInterface( REFIID iid, LPVOID *ppv )
227 { return E_NOINTERFACE; }
228 virtual ULONG STDMETHODCALLTYPE AddRef()
230 virtual ULONG STDMETHODCALLTYPE Release()
233 /************************* DeckLink API Delegate Methods *****************************/
235 virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(
236 IDeckLinkVideoInputFrame* video,
237 IDeckLinkAudioInputPacket* audio )
240 mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( getProducer() ) );
245 if ( !( video->GetFlags() & bmdFrameHasNoInputSource ) )
247 int size = video->GetRowBytes() * video->GetHeight();
248 void* image = mlt_pool_alloc( size );
251 video->GetBytes( &buffer );
252 if ( image && buffer )
254 swab( buffer, image, size );
255 mlt_frame_set_image( frame, (uint8_t*) image, size, mlt_pool_release );
259 mlt_log_verbose( getProducer(), "no video\n" );
260 mlt_pool_release( image );
265 mlt_log_verbose( getProducer(), "no signal\n" );
266 mlt_frame_close( frame );
272 mlt_log_verbose( getProducer(), "no video\n" );
273 mlt_frame_close( frame );
278 if ( frame && audio )
280 int channels = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "channels" );
281 int size = audio->GetSampleFrameCount() * channels * sizeof(int16_t);
282 mlt_audio_format format = mlt_audio_s16;
283 void* pcm = mlt_pool_alloc( size );
286 audio->GetBytes( &buffer );
289 memcpy( pcm, buffer, size );
290 mlt_frame_set_audio( frame, pcm, format, size, mlt_pool_release );
291 mlt_properties_set_int( MLT_FRAME_PROPERTIES(frame), "audio_samples", audio->GetSampleFrameCount() );
295 mlt_log_verbose( getProducer(), "no audio\n" );
296 mlt_pool_release( pcm );
301 mlt_log_verbose( getProducer(), "no audio\n" );
304 // Put frame in queue
307 int queueMax = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "buffer" );
308 pthread_mutex_lock( &m_mutex );
309 if ( mlt_deque_count( m_queue ) < queueMax )
311 mlt_deque_push_back( m_queue, frame );
312 pthread_cond_broadcast( &m_condition );
316 mlt_frame_close( frame );
317 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "dropped", ++m_dropped );
318 mlt_log_warning( getProducer(), "frame dropped %d\n", m_dropped );
320 pthread_mutex_unlock( &m_mutex );
326 virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(
327 BMDVideoInputFormatChangedEvents events,
328 IDeckLinkDisplayMode* mode,
329 BMDDetectedVideoInputFormatFlags flags )
335 static int get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
337 return mlt_frame_get_audio( frame, (void**) buffer, format, frequency, channels, samples );
340 static int get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
342 return mlt_frame_get_image( frame, buffer, format, width, height, writable );
345 static int get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
347 DeckLinkProducer* decklink = (DeckLinkProducer*) producer->child;
349 // Get the next frame from the decklink object
350 *frame = decklink->getFrame();
352 // Calculate the next timecode
353 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
354 mlt_producer_prepare_next( producer );
356 // Add audio and video getters
357 mlt_frame_push_audio( *frame, (void*) get_audio );
358 mlt_frame_push_get_image( *frame, get_image );
363 static void producer_close( mlt_producer producer )
365 producer->close = NULL;
366 mlt_producer_close( producer );
367 delete (DeckLinkProducer*) producer->child;
372 /** Initialise the producer.
375 mlt_producer producer_decklink_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
377 // Allocate the producer
378 DeckLinkProducer* decklink = new DeckLinkProducer();
379 mlt_producer producer = NULL;
381 // If allocated and initializes
382 if ( decklink && !mlt_producer_init( decklink->getProducer(), decklink ) )
384 if ( decklink->open( profile, arg? atoi( arg ) : 0 ) )
386 producer = decklink->getProducer();
387 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
390 producer->close = (mlt_destructor) producer_close;
391 producer->get_frame = get_frame;
394 mlt_properties_set( properties, "resource", arg? arg : "0" );
395 mlt_properties_set_int( properties, "channels", 2 );
396 mlt_properties_set_int( properties, "buffer", 25 );
397 mlt_properties_set_int( properties, "length", INT_MAX );
398 mlt_properties_set_int( properties, "out", INT_MAX - 1 );
399 mlt_properties_set( properties, "eof", "loop" );
402 if ( !decklink->start( profile ) )
404 producer_close( producer );