forked from bartvdbraak/blender
137 lines
3.4 KiB
C++
137 lines
3.4 KiB
C++
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* Copyright 2009-2011 Jörg Hermann Müller
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*
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* This file is part of AudaSpace.
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*
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* Audaspace is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* AudaSpace is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Audaspace; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file audaspace/intern/AUD_ChannelMapperReader.h
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* \ingroup audaspaceintern
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*/
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#ifndef __AUD_CHANNELMAPPERREADER_H__
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#define __AUD_CHANNELMAPPERREADER_H__
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#include "AUD_EffectReader.h"
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#include "AUD_Buffer.h"
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/**
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* This class maps a sound source's channels to a specific output channel count.
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* \note The input sample format must be float.
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*/
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class AUD_ChannelMapperReader : public AUD_EffectReader
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{
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private:
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/**
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* The sound reading buffer.
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*/
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AUD_Buffer m_buffer;
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/**
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* The output specification.
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*/
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AUD_Channels m_target_channels;
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/**
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* The channel count of the reader.
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*/
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AUD_Channels m_source_channels;
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/**
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* The mapping specification.
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*/
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float* m_mapping;
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/**
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* The size of the mapping.
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*/
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int m_map_size;
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/**
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* The mono source angle.
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*/
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float m_mono_angle;
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static const AUD_Channel MONO_MAP[];
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static const AUD_Channel STEREO_MAP[];
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static const AUD_Channel STEREO_LFE_MAP[];
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static const AUD_Channel SURROUND4_MAP[];
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static const AUD_Channel SURROUND5_MAP[];
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static const AUD_Channel SURROUND51_MAP[];
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static const AUD_Channel SURROUND61_MAP[];
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static const AUD_Channel SURROUND71_MAP[];
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static const AUD_Channel* CHANNEL_MAPS[];
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static const float MONO_ANGLES[];
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static const float STEREO_ANGLES[];
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static const float STEREO_LFE_ANGLES[];
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static const float SURROUND4_ANGLES[];
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static const float SURROUND5_ANGLES[];
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static const float SURROUND51_ANGLES[];
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static const float SURROUND61_ANGLES[];
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static const float SURROUND71_ANGLES[];
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static const float* CHANNEL_ANGLES[];
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// hide copy constructor and operator=
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AUD_ChannelMapperReader(const AUD_ChannelMapperReader&);
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AUD_ChannelMapperReader& operator=(const AUD_ChannelMapperReader&);
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/**
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* Calculates the mapping matrix.
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*/
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void calculateMapping();
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/**
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* Calculates the distance between two angles.
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*/
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float angleDistance(float alpha, float beta);
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public:
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/**
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* Creates a channel mapper reader.
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* \param reader The reader to map.
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* \param mapping The mapping specification as two dimensional float array.
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*/
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AUD_ChannelMapperReader(boost::shared_ptr<AUD_IReader> reader, AUD_Channels channels);
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/**
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* Destroys the reader.
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*/
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~AUD_ChannelMapperReader();
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/**
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* Sets the requested channel output count.
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* \param channels The channel output count.
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*/
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void setChannels(AUD_Channels channels);
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/**
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* Sets the angle for mono sources.
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* \param angle The angle for mono sources.
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*/
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void setMonoAngle(float angle);
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virtual AUD_Specs getSpecs() const;
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virtual void read(int& length, bool& eos, sample_t* buffer);
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};
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#endif //__AUD_CHANNELMAPPERREADER_H__
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