Robin E.R. Davies
110 lines
2.7 KiB
C++
110 lines
2.7 KiB
C++
/*
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* Copyright (c) Robin E.R. Davies
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* All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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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 THE
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* 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 FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "DbDezipper.hpp"
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using namespace pipedal;
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static const int SEGMENT_SIZE = 64;
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void DbDezipper::SetSampleRate(double sampleRate)
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{
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this->sampleRate = sampleRate;
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this->dbPerSegment = 96/rate * SEGMENT_SIZE / sampleRate;
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}
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void DbDezipper::SetRate(float seconds)
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{
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this->rate = seconds;
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this->dbPerSegment = 96/rate * SEGMENT_SIZE / sampleRate;
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}
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void DbDezipper::SetMinDb(float minDb)
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{
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this->minDb = minDb;
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if (targetDb < minDb)
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{
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targetDb = minDb;
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count = 0;
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}
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if (currentDb < minDb)
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{
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currentDb = minDb;
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x = targetX = 0;
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dx = 0;
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count = 0;
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}
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}
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void DbDezipper::NextSegment()
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{
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if (targetDb == currentDb)
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{
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x = targetX;
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dx = 0;
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if (targetDb <= minDb)
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{
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x = 0;
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}
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count = -1;
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return;
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}
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else if (targetDb < currentDb)
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{
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currentDb -= dbPerSegment;
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if (currentDb < targetDb)
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{
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currentDb = targetDb;
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}
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}
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else
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{
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currentDb += dbPerSegment;
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if (currentDb > targetDb)
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{
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currentDb = targetDb;
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}
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}
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this->targetX = db2a(currentDb);
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this->dx = (targetX - x) / SEGMENT_SIZE;
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this->count = SEGMENT_SIZE;
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}
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void DbDezipper::Reset(float db)
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{
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float value;
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if (db <= minDb)
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{
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value = 0;
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} else {
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value = db2a(db);
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}
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x = targetX = value;
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dx = 0;
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currentDb = db;
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targetDb = db;
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count = -1;
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}
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