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Viewing changes to intern/audaspace/FX/AUD_EnvelopeFactory.cpp

  • Committer: Package Import Robot
  • Author(s): Matteo F. Vescovi
  • Date: 2012-07-23 08:54:18 UTC
  • mfrom: (14.2.16 sid)
  • mto: (14.2.19 sid)
  • mto: This revision was merged to the branch mainline in revision 42.
  • Revision ID: package-import@ubuntu.com-20120723085418-9foz30v6afaf5ffs
Tags: 2.63a-2
http://bugs.debian.org/658075
* debian/: Cycles support added (Closes: #658075)
  For now, this top feature has been enabled only
  on [any-amd64 any-i386] architectures because
  of OpenImageIO failing on all others
* debian/: scripts installation path changed
  from /usr/lib to /usr/share:
  + debian/patches/: patchset re-worked for path changing
  + debian/control: "Breaks" field added on yafaray-exporter

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intern/audaspace/FX/AUD_EnvelopeFactory.cpp
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/*
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 * $Id: AUD_EnvelopeFactory.cpp 25643 2010-01-01 05:09:30Z nexyon $
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 *
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 * ***** BEGIN LGPL LICENSE BLOCK *****
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 *
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 * Copyright 2009 Jörg Hermann Müller
 
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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 Lesser General Public License as published by
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 * the Free Software Foundation, either version 3 of the License, or
 
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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 Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public License
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 * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
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 *
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 * ***** END LGPL LICENSE BLOCK *****
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 */
 
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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/FX/AUD_EnvelopeFactory.cpp
 
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 *  \ingroup audfx
 
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 */
 
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#include "AUD_EnvelopeFactory.h"
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#include "AUD_EnvelopeReader.h"
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AUD_EnvelopeFactory::AUD_EnvelopeFactory(AUD_IFactory* factory, float attack,
 
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#include "AUD_CallbackIIRFilterReader.h"
 
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#include <cmath>
 
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struct EnvelopeParameters
 
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{
 
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        float attack;
 
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        float release;
 
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        float threshold;
 
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        float arthreshold;
 
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};
 
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sample_t AUD_EnvelopeFactory::envelopeFilter(AUD_CallbackIIRFilterReader* reader, EnvelopeParameters* param)
 
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{
 
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        float in = fabs(reader->x(0));
 
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        float out = reader->y(-1);
 
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        if(in < param->threshold)
 
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                in = 0.0f;
 
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        return (in > out ? param->attack : param->release) * (out - in) + in;
 
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}
 
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void AUD_EnvelopeFactory::endEnvelopeFilter(EnvelopeParameters* param)
 
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{
 
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        delete param;
 
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}
 
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AUD_EnvelopeFactory::AUD_EnvelopeFactory(AUD_Reference<AUD_IFactory> factory, float attack,
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                                                                                 float release, float threshold,
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                                                                                 float arthreshold) :
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                AUD_EffectFactory(factory),
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                m_attack(attack),
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                m_release(release),
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                m_threshold(threshold),
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                m_arthreshold(arthreshold) {}
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AUD_EnvelopeFactory::AUD_EnvelopeFactory(float attack, float release,
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                                                                                 float threshold, float arthreshold) :
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                AUD_EffectFactory(0),
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                m_attack(attack),
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                m_release(release),
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                m_threshold(threshold),
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                m_arthreshold(arthreshold) {}
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AUD_IReader* AUD_EnvelopeFactory::createReader()
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{
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        AUD_IReader* reader = getReader();
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        if(reader != 0)
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        {
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                reader = new AUD_EnvelopeReader(reader, m_attack, m_release,
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                                                                                m_threshold, m_arthreshold);
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                AUD_NEW("reader")
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        }
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        return reader;
 
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                m_arthreshold(arthreshold)
 
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{
 
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}
 
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AUD_Reference<AUD_IReader> AUD_EnvelopeFactory::createReader()
 
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{
 
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        AUD_Reference<AUD_IReader> reader = getReader();
 
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        EnvelopeParameters* param = new EnvelopeParameters();
 
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        param->arthreshold = m_arthreshold;
 
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        param->attack = pow(m_arthreshold, 1.0f/(static_cast<float>(reader->getSpecs().rate) * m_attack));
 
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        param->release = pow(m_arthreshold, 1.0f/(static_cast<float>(reader->getSpecs().rate) * m_release));
 
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        param->threshold = m_threshold;
 
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        return new AUD_CallbackIIRFilterReader(reader, 1, 2,
 
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                                                                                   (doFilterIIR) envelopeFilter,
 
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                                                                                   (endFilterIIR) endEnvelopeFilter,
 
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                                                                                   param);
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}