28 #include "../include/DecklinkWriter.h" 33 : device(device), is_open(
false), g_videoModeIndex(video_mode), g_audioChannels(channels), g_audioSampleDepth(sample_depth)
37 selectedDisplayMode = bmdModeNTSC;
38 pixelFormat = bmdFormat8BitYUV;
41 foundDisplayMode =
false;
42 pthread_mutex_init(&sleepMutex, NULL);
43 pthread_cond_init(&sleepCond, NULL);
47 case 0: pixelFormat = bmdFormat8BitYUV;
break;
48 case 1: pixelFormat = bmdFormat10BitYUV;
break;
49 case 2: pixelFormat = bmdFormat10BitRGB;
break;
50 case 3: pixelFormat = bmdFormat8BitARGB;
break;
52 throw DecklinkError(
"Pixel format is not valid (must be 0,1,2,3).");
63 deckLinkIterator = CreateDeckLinkIteratorInstance();
65 if (!deckLinkIterator)
66 throw DecklinkError(
"This application requires the DeckLink drivers installed.");
69 for (
int device_count = 0; device_count <= device; device_count++)
72 result = deckLinkIterator->Next(&deckLink);
74 throw DecklinkError(
"No DeckLink PCI cards found.");
76 if (device_count == device)
80 if (deckLink->QueryInterface(IID_IDeckLinkOutput, (
void**)&deckLinkOutput) != S_OK)
81 throw DecklinkError(
"DeckLink QueryInterface Failed.");
84 result = deckLinkOutput->GetDisplayModeIterator(&displayModeIterator);
86 throw DecklinkError(
"Could not obtain the video output display mode iterator.");
88 if (g_videoModeIndex < 0)
89 throw DecklinkError(
"No video mode specified.");
92 const char *displayModeName;
93 BMDTimeValue frameRateDuration, frameRateScale;
95 while (displayModeIterator->Next(&displayMode) == S_OK)
97 if (g_videoModeIndex == displayModeCount)
99 BMDDisplayModeSupport result;
101 foundDisplayMode =
true;
102 displayMode->GetName(&displayModeName);
103 selectedDisplayMode = displayMode->GetDisplayMode();
107 displayMode->GetFrameRate(&frameRateDuration, &frameRateScale);
120 if (!foundDisplayMode)
121 throw DecklinkError(
"Invalid video mode. No matching ones found.");
124 unsigned long m_framesPerSecond = (
unsigned long)((frameRateScale + (frameRateDuration-1)) / frameRateDuration);
130 deckLinkOutput->SetScheduledFrameCompletionCallback(delegate);
134 if (deckLinkOutput->EnableVideoOutput(displayMode->GetDisplayMode(), bmdVideoOutputFlagDefault) != S_OK)
135 throw DecklinkError(
"Failed to enable video output. Is another application using the card?");
196 deckLinkOutput->StopScheduledPlayback(0, NULL, 0);
197 deckLinkOutput->DisableAudioOutput();
198 deckLinkOutput->DisableVideoOutput();
201 displayMode->Release();
203 if (displayModeIterator != NULL)
205 displayModeIterator->Release();
206 displayModeIterator = NULL;
209 if (deckLinkOutput != NULL)
211 deckLinkOutput->Release();
212 deckLinkOutput = NULL;
215 if (deckLink != NULL)
221 if (deckLinkIterator != NULL)
222 deckLinkIterator->Release();
234 throw WriterClosed(
"The DecklinkWriter is closed. Call Open() before calling this method.",
"");
243 for (
int number = start; number <= length; number++)
246 tr1::shared_ptr<Frame> f = reader->GetFrame(number);
int num
Numerator for the fraction.
WriterInfo info
Information about the current media file.
Implementation of the Blackmagic Decklink API (used by the DecklinkWriter)
Fraction pixel_ratio
The pixel ratio of the video stream as a fraction (i.e. some pixels are not square) ...
string vcodec
The name of the video codec used to encode / decode the video stream.
void WriteFrame(tr1::shared_ptr< openshot::Frame > frame)
Custom method to write new frames.
This abstract class is the base class, used by all readers in libopenshot.
int width
The width of the video (in pixels)
Fraction video_timebase
The video timebase determines how long each frame stays on the screen.
float duration
Length of time (in seconds)
Exception when accessing a blackmagic decklink card.
This class represents a fraction.
Fraction display_ratio
The ratio of width to height of the video stream (i.e. 640x480 has a ratio of 4/3) ...
DecklinkWriter(int device, int video_mode, int pixel_format, int channels, int sample_depth)
void WriteFrame(tr1::shared_ptr< Frame > frame)
This method is required for all derived classes of WriterBase. Write a Frame to the video file...
bool has_video
Determines if this file has a video stream.
Fraction fps
Frames per second, as a fraction (i.e. 24/1 = 24 fps)
void Open()
Open device and video stream - which is called by the constructor automatically.
This namespace is the default namespace for all code in the openshot library.
int file_size
Size of file (in bytes)
void Close()
Close the device and video stream.
bool has_audio
Determines if this file has an audio stream.
Exception when a writer is closed, and a frame is requested.
int height
The height of the video (in pixels)
int den
Denominator for the fraction.
long int video_length
The number of frames in the video stream.
double ToDouble()
Return this fraction as a double (i.e. 1/2 = 0.5)