31 #include "../include/DecklinkWriter.h"
36 : device(device), is_open(false), g_videoModeIndex(video_mode), g_audioChannels(channels), g_audioSampleDepth(sample_depth)
40 selectedDisplayMode = bmdModeNTSC;
41 pixelFormat = bmdFormat8BitYUV;
44 foundDisplayMode =
false;
45 pthread_mutex_init(&sleepMutex, NULL);
46 pthread_cond_init(&sleepCond, NULL);
50 case 0: pixelFormat = bmdFormat8BitYUV;
break;
51 case 1: pixelFormat = bmdFormat10BitYUV;
break;
52 case 2: pixelFormat = bmdFormat10BitRGB;
break;
53 case 3: pixelFormat = bmdFormat8BitARGB;
break;
55 throw DecklinkError(
"Pixel format is not valid (must be 0,1,2,3).");
66 deckLinkIterator = CreateDeckLinkIteratorInstance();
68 if (!deckLinkIterator)
69 throw DecklinkError(
"This application requires the DeckLink drivers installed.");
72 for (
int device_count = 0; device_count <= device; device_count++)
75 result = deckLinkIterator->Next(&deckLink);
79 if (device_count == device)
83 if (deckLink->QueryInterface(IID_IDeckLinkOutput, (
void**)&deckLinkOutput) != S_OK)
87 result = deckLinkOutput->GetDisplayModeIterator(&displayModeIterator);
89 throw DecklinkError(
"Could not obtain the video output display mode iterator.");
91 if (g_videoModeIndex < 0)
95 const char *displayModeName;
96 BMDTimeValue frameRateDuration, frameRateScale;
98 while (displayModeIterator->Next(&displayMode) == S_OK)
100 if (g_videoModeIndex == displayModeCount)
102 BMDDisplayModeSupport result;
104 foundDisplayMode =
true;
105 displayMode->GetName(&displayModeName);
106 selectedDisplayMode = displayMode->GetDisplayMode();
110 displayMode->GetFrameRate(&frameRateDuration, &frameRateScale);
123 if (!foundDisplayMode)
124 throw DecklinkError(
"Invalid video mode. No matching ones found.");
127 unsigned long m_framesPerSecond = (
unsigned long)((frameRateScale + (frameRateDuration-1)) / frameRateDuration);
133 deckLinkOutput->SetScheduledFrameCompletionCallback(delegate);
137 if (deckLinkOutput->EnableVideoOutput(displayMode->GetDisplayMode(), bmdVideoOutputFlagDefault) != S_OK)
138 throw DecklinkError(
"Failed to enable video output. Is another application using the card?");
199 deckLinkOutput->StopScheduledPlayback(0, NULL, 0);
200 deckLinkOutput->DisableAudioOutput();
201 deckLinkOutput->DisableVideoOutput();
204 displayMode->Release();
206 if (displayModeIterator != NULL)
208 displayModeIterator->Release();
209 displayModeIterator = NULL;
212 if (deckLinkOutput != NULL)
214 deckLinkOutput->Release();
215 deckLinkOutput = NULL;
218 if (deckLink != NULL)
224 if (deckLinkIterator != NULL)
225 deckLinkIterator->Release();
237 throw WriterClosed(
"The DecklinkWriter is closed. Call Open() before calling this method.");
246 for (
int number = start; number <= length; number++)
249 std::shared_ptr<Frame> f = reader->
GetFrame(number);
Implementation of the Blackmagic Decklink API (used by the DecklinkWriter)
void WriteFrame(std::shared_ptr< openshot::Frame > frame)
Custom method to write new frames.
Exception when accessing a blackmagic decklink card.
void Close()
Close the device and video stream.
void WriteFrame(std::shared_ptr< Frame > frame)
This method is required for all derived classes of WriterBase. Write a Frame to the video file.
void Open()
Open device and video stream - which is called by the constructor automatically.
DecklinkWriter(int device, int video_mode, int pixel_format, int channels, int sample_depth)
This class represents a fraction.
int num
Numerator for the fraction.
double ToDouble()
Return this fraction as a double (i.e. 1/2 = 0.5)
void Reduce()
Reduce this fraction (i.e. 640/480 = 4/3)
int den
Denominator for the fraction.
This abstract class is the base class, used by all readers in libopenshot.
virtual std::shared_ptr< openshot::Frame > GetFrame(int64_t number)=0
WriterInfo info
Information about the current media file.
Exception when a writer is closed, and a frame is requested.
This namespace is the default namespace for all code in the openshot library.
int height
The height of the video (in pixels)
bool has_audio
Determines if this file has an audio stream.
int64_t video_length
The number of frames in the video stream.
float duration
Length of time (in seconds)
std::string vcodec
The name of the video codec used to encode / decode the video stream.
bool has_video
Determines if this file has a video stream.
openshot::Fraction fps
Frames per second, as a fraction (i.e. 24/1 = 24 fps)
openshot::Fraction video_timebase
The video timebase determines how long each frame stays on the screen.
openshot::Fraction display_ratio
The ratio of width to height of the video stream (i.e. 640x480 has a ratio of 4/3)
int width
The width of the video (in pixels)
openshot::Fraction pixel_ratio
The pixel ratio of the video stream as a fraction (i.e. some pixels are not square)
int64_t file_size
Size of file (in bytes)