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/*******************************************************************************
* Copyright 2009-2016 Jörg Müller
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
#include "fx/Threshold.h"
#include "fx/CallbackIIRFilterReader.h"
AUD_NAMESPACE_BEGIN
sample_t Threshold::thresholdFilter(CallbackIIRFilterReader* reader, float* threshold)
{
float in = reader->x(0);
if(in >= *threshold)
return 1;
else if(in <= -*threshold)
return -1;
else
return 0;
}
void Threshold::endThresholdFilter(float* threshold)
{
delete threshold;
}
Threshold::Threshold(std::shared_ptr<ISound> sound, float threshold) :
Effect(sound),
m_threshold(threshold)
{
}
float Threshold::getThreshold() const
{
return m_threshold;
}
std::shared_ptr<IReader> Threshold::createReader()
{
return std::shared_ptr<IReader>(new CallbackIIRFilterReader(getReader(), 1, 0, doFilterIIR(thresholdFilter), endFilterIIR(endThresholdFilter), new float(m_threshold)));
}
AUD_NAMESPACE_END
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