/*
    This file is part of EqualizerAPO, a system-wide equalizer.
    Copyright (C) 2012  Jonas Thedering

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#pragma once

#include <Unknwn.h>
#include <audioenginebaseapo.h>
#include <BaseAudioProcessingObject.h>
#include "FilterEngine.h"

class INonDelegatingUnknown
{
	virtual HRESULT __stdcall NonDelegatingQueryInterface(const IID& iid, void** ppv) = 0;
	virtual ULONG __stdcall NonDelegatingAddRef() = 0;
	virtual ULONG __stdcall NonDelegatingRelease() = 0;
};

class EqualizerAPO : public CBaseAudioProcessingObject, public IAudioSystemEffects, public INonDelegatingUnknown
{
public:
	EqualizerAPO(IUnknown* pUnkOuter);
	virtual ~EqualizerAPO();

	// IUnknown
	virtual HRESULT __stdcall QueryInterface(const IID& iid, void** ppv);
	virtual ULONG __stdcall AddRef();
	virtual ULONG __stdcall Release();

	// IAudioProcessingObject
	virtual HRESULT __stdcall GetLatency(HNSTIME* pTime);
	virtual HRESULT __stdcall Initialize(UINT32 cbDataSize, BYTE* pbyData);
	virtual HRESULT __stdcall IsInputFormatSupported(IAudioMediaType* pOutputFormat,
		IAudioMediaType* pRequestedInputFormat, IAudioMediaType** ppSupportedInputFormat);

	// IAudioProcessingObjectConfiguration
	virtual HRESULT __stdcall LockForProcess(UINT32 u32NumInputConnections,
		APO_CONNECTION_DESCRIPTOR** ppInputConnections, UINT32 u32NumOutputConnections,
		APO_CONNECTION_DESCRIPTOR** ppOutputConnections);
	virtual HRESULT __stdcall UnlockForProcess(void);

	// IAudioProcessingObjectRT
	virtual void __stdcall APOProcess(UINT32 u32NumInputConnections,
		APO_CONNECTION_PROPERTY** ppInputConnections, UINT32 u32NumOutputConnections,
		APO_CONNECTION_PROPERTY** ppOutputConnections);

	// INonDelegatingUnknown
	virtual HRESULT __stdcall NonDelegatingQueryInterface(const IID& iid, void** ppv);
	virtual ULONG __stdcall NonDelegatingAddRef();
	virtual ULONG __stdcall NonDelegatingRelease();

	static long instCount;
	static const CRegAPOProperties<1> regPostMixProperties;
	static const CRegAPOProperties<1> regPreMixProperties;

private:
	long refCount;
	IUnknown* pUnkOuter;
	FilterEngine engine;
	bool allowSilentBufferModification;

	void resetChild();

	IAudioProcessingObject* childAPO;
	IAudioProcessingObjectRT* childRT;
	IAudioProcessingObjectConfiguration* childCfg;
};