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74 lines
1.8 KiB
74 lines
1.8 KiB
/*
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* Copyright (C) 2009,2010 by Jonathan Naylor G4KLX
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*
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* This program 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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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "Bleeper.h"
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#include <cmath>
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CBleeper::CBleeper(unsigned int sampleRate, unsigned int hz, unsigned int ms, float amplitude) :
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m_audio(NULL),
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m_length(0U),
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m_total(0U),
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m_position(0U)
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{
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wxASSERT(sampleRate > 0U);
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wxASSERT(hz > 0U);
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wxASSERT(ms > 0U);
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wxASSERT(amplitude > 0.0F);
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m_length = sampleRate / hz;
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m_total = (sampleRate * ms) / 1000U;
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m_audio = new wxFloat32[m_length];
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for (unsigned int i = 0U; i < m_length; i++) {
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if (i < m_length / 2U)
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m_audio[i] = amplitude;
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else
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m_audio[i] = -amplitude;
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}
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}
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CBleeper::~CBleeper()
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{
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delete[] m_audio;
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}
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unsigned int CBleeper::getAudio(wxFloat32* audio, unsigned int length)
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{
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wxASSERT(audio != NULL);
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wxASSERT(length > 0U);
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unsigned int n = 0U;
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while (n < length && m_position < m_total) {
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unsigned int pos = m_position % m_length;
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audio[n] = m_audio[pos];
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m_position++;
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n++;
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}
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return n;
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}
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void CBleeper::reset()
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{
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m_position = 0U;
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}
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