obs-studio/plugins/decklink/decklink-device-instance.hpp

#pragma once

#define LOG(level, message, ...) blog(level, "%s: " message, "decklink", ##__VA_ARGS__)

#include <obs-module.h>
#include "decklink-device.hpp"
#include "../../libobs/media-io/video-scaler.h"

class AudioRepacker;
class DecklinkBase;

class DeckLinkDeviceInstance : public IDeckLinkInputCallback {
protected:
	struct obs_source_frame currentFrame;
	struct obs_source_audio currentPacket;
	DecklinkBase            *decklink = nullptr;
	DeckLinkDevice          *device = nullptr;
	DeckLinkDeviceMode      *mode = nullptr;
	BMDDisplayMode          displayMode = bmdModeNTSC;
	BMDPixelFormat          pixelFormat = bmdFormat8BitYUV;
	video_colorspace        colorSpace = VIDEO_CS_DEFAULT;
	video_colorspace        activeColorSpace = VIDEO_CS_DEFAULT;
	video_range_type        colorRange = VIDEO_RANGE_DEFAULT;
	ComPtr<IDeckLinkInput>  input;
	ComPtr<IDeckLinkOutput> output;
	volatile long           refCount = 1;
	int64_t                 audioOffset = 0;
	uint64_t                nextAudioTS = 0;
	uint64_t                lastVideoTS = 0;
	AudioRepacker           *audioRepacker = nullptr;
	speaker_layout          channelFormat = SPEAKERS_STEREO;
	bool                    swap;

	IDeckLinkMutableVideoFrame *decklinkOutputFrame = nullptr;

	void FinalizeStream();
	void SetupVideoFormat(DeckLinkDeviceMode *mode_);

	void HandleAudioPacket(IDeckLinkAudioInputPacket *audioPacket,
			const uint64_t timestamp);
	void HandleVideoFrame(IDeckLinkVideoInputFrame *videoFrame,
			const uint64_t timestamp);

public:
	DeckLinkDeviceInstance(DecklinkBase *decklink, DeckLinkDevice *device);
	virtual ~DeckLinkDeviceInstance();

	inline DeckLinkDevice *GetDevice() const {return device;}
	inline long long GetActiveModeId() const
	{
		return mode ? mode->GetId() : 0;
	}

	inline BMDPixelFormat GetActivePixelFormat() const {return pixelFormat;}
	inline video_colorspace GetActiveColorSpace() const {return colorSpace;}
	inline video_range_type GetActiveColorRange() const {return colorRange;}
	inline speaker_layout GetActiveChannelFormat() const {return channelFormat;}
	inline bool GetActiveSwapState() const {return swap;}

	inline DeckLinkDeviceMode *GetMode() const {return mode;}

	bool StartCapture(DeckLinkDeviceMode *mode);
	bool StopCapture(void);

	bool StartOutput(DeckLinkDeviceMode *mode_);
	bool StopOutput(void);

	HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(
			IDeckLinkVideoInputFrame *videoFrame,
			IDeckLinkAudioInputPacket *audioPacket);
	HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(
			BMDVideoInputFormatChangedEvents events,
			IDeckLinkDisplayMode *newMode,
			BMDDetectedVideoInputFormatFlags detectedSignalFlags);

	ULONG STDMETHODCALLTYPE AddRef(void);
	HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv);
	ULONG STDMETHODCALLTYPE Release(void);

	void DisplayVideoFrame(video_data *frame);
	void WriteAudio(audio_data *frames);
};