DeckLinkDeviceDiscovery.h

/* -LICENSE-START-
** Copyright (c) 2018 Blackmagic Design
**
** Permission is hereby granted, free of charge, to any person or organization
** obtaining a copy of the software and accompanying documentation covered by
** this license (the "Software") to use, reproduce, display, distribute,
** execute, and transmit the Software, and to prepare derivative works of the
** Software, and to permit third-parties to whom the Software is furnished to
** do so, all subject to the following:
**
** The copyright notices in the Software and this entire statement, including
** the above license grant, this restriction and the following disclaimer,
** must be included in all copies of the Software, in whole or in part, and
** all derivative works of the Software, unless such copies or derivative
** works are solely in the form of machine-executable object code generated by
** a source language processor.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
** FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
** SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
** FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
** ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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** -LICENSE-END-
*/
//
// DeckLinkDeviceDiscovery.h
// DeckLink Device Discovery Callback
//

#pragma once

#include "MyDeckLinkAPI.h"
#include <QEvent>

class DeckLinkCapture;

class DeckLinkDeviceDiscovery : public IDeckLinkDeviceNotificationCallback {
private:
	IDeckLinkDiscovery *decklink_discovery_;
	DeckLinkCapture *delegate_;
	QAtomicInt refcount_;

public:
	DeckLinkDeviceDiscovery(DeckLinkCapture *owner);
	virtual ~DeckLinkDeviceDiscovery();

	bool enable();
	void disable();

	// IDeckLinkDeviceArrivalNotificationCallback interface
	virtual HRESULT STDMETHODCALLTYPE DeckLinkDeviceArrived(/* in */ IDeckLink *decklink);
	virtual HRESULT STDMETHODCALLTYPE DeckLinkDeviceRemoved(/* in */ IDeckLink *decklink);

	// IUnknown needs only a dummy implementation
	virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void **ppv);
	virtual ULONG STDMETHODCALLTYPE AddRef();
	virtual ULONG STDMETHODCALLTYPE Release();
};

class DeckLinkDeviceDiscoveryEvent : public QEvent {
private:
	IDeckLink *decklink_;
public:
	DeckLinkDeviceDiscoveryEvent(QEvent::Type type, IDeckLink *deckLinkDevice)
		: QEvent(type)
		, decklink_(deckLinkDevice)
	{
		decklink_->AddRef();
	}

	virtual ~DeckLinkDeviceDiscoveryEvent()
	{
		decklink_->Release();
	}

	IDeckLink *decklink() const
	{
		return decklink_;
	}
};