53 lines
2.0 KiB
C++
53 lines
2.0 KiB
C++
/**
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* @author Bojan MARKOVIC
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* @author Edouard DUPIN
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* @copyright 2006, ChunkWare Music Software, OPEN-SOURCE
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* @license BSD-1 (see license file)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* * The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <audio/algo/chunkware/debug.h>
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#include <audio/algo/chunkware/EnvelopeDetector.h>
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audio::algo::chunkware::EnvelopeDetector::EnvelopeDetector(double _ms, double _sampleRate) {
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AA_CHUNK_ASSERT(_sampleRate > 0.0, "input function error");
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AA_CHUNK_ASSERT(_ms > 0.0, "input function error");
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m_sampleRate = _sampleRate;
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m_timeMs = _ms;
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setCoef();
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}
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void audio::algo::chunkware::EnvelopeDetector::setTc(double _ms) {
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AA_CHUNK_ASSERT(_ms > 0.0, "input function error");
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m_timeMs = _ms;
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setCoef();
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}
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void audio::algo::chunkware::EnvelopeDetector::setSampleRate(double _sampleRate) {
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AA_CHUNK_ASSERT(_sampleRate > 0.0, "input function error");
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m_sampleRate = _sampleRate;
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setCoef();
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}
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void audio::algo::chunkware::EnvelopeDetector::setCoef() {
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m_coefficient = exp(-1000.0 / (m_timeMs * m_sampleRate));
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}
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