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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* Copyright 2009-2011 Jörg Hermann Müller
*
* This file is part of AudaSpace.
*
* Audaspace 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.
*
* AudaSpace 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 Audaspace; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file audaspace/intern/AUD_Mixer.h
* \ingroup audaspaceintern
*/
#ifndef __AUD_MIXER_H__
#define __AUD_MIXER_H__
#include "AUD_ConverterFunctions.h"
#include "AUD_Buffer.h"
#include "AUD_Reference.h"
class AUD_IReader;
/**
* This abstract class is able to mix audiosignals with same channel count
* and sample rate and convert it to a specific output format.
*/
class AUD_Mixer
{
protected:
/**
* The output specification.
*/
AUD_DeviceSpecs m_specs;
/**
* The length of the mixing buffer.
*/
int m_length;
/**
* The mixing buffer.
*/
AUD_Buffer m_buffer;
/**
* Converter function.
*/
AUD_convert_f m_convert;
public:
/**
* Creates the mixer.
*/
AUD_Mixer(AUD_DeviceSpecs specs);
/**
* Destroys the mixer.
*/
virtual ~AUD_Mixer() {}
/**
* Returns the target specification for superposing.
* \return The target specification.
*/
AUD_DeviceSpecs getSpecs() const;
/**
* Sets the target specification for superposing.
* \param specs The target specification.
*/
void setSpecs(AUD_Specs specs);
/**
* Mixes a buffer.
* \param buffer The buffer to superpose.
* \param start The start sample of the buffer.
* \param length The length of the buffer in samples.
* \param volume The mixing volume. Must be a value between 0.0 and 1.0.
*/
void mix(sample_t* buffer, int start, int length, float volume);
/**
* Writes the mixing buffer into an output buffer.
* \param buffer The target buffer for superposing.
* \param volume The mixing volume. Must be a value between 0.0 and 1.0.
*/
void read(data_t* buffer, float volume);
/**
* Clears the mixing buffer.
* \param length The length of the buffer in samples.
*/
void clear(int length);
};
#endif //__AUD_MIXER_H__
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