mirror of
https://github.com/f4exb/sdrangel.git
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85 lines
3.1 KiB
C++
85 lines
3.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2018 Edouard Griffiths, F4EXB. //
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// //
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// SDRdaemon source channel (Tx). Samples buffer //
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// //
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// SDRdaemon is a detached SDR front end that handles the interface with a //
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// physical device and sends or receives the I/Q samples stream to or from a //
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// SDRangel instance via UDP. It is controlled via a Web REST API. //
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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 as version 3 of the License, or //
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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 V3 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, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include "channel/sdrdaemonchannelsourcebuffer.h"
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SDRDaemonChannelSourceBuffer::SDRDaemonChannelSourceBuffer(uint32_t nbSamples)
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{
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m_buffer = new Sample[nbSamples];
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m_wp = nbSamples/2;
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m_rp = 0;
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m_size = nbSamples;
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}
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SDRDaemonChannelSourceBuffer::~SDRDaemonChannelSourceBuffer()
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{
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delete[] m_buffer;
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}
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void SDRDaemonChannelSourceBuffer::resize(uint32_t nbSamples)
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{
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if (nbSamples > m_size)
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{
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delete[] m_buffer;
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m_buffer = new Sample[nbSamples];
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}
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m_wp = nbSamples/2;
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m_rp = 0;
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m_size = nbSamples;
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}
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void SDRDaemonChannelSourceBuffer::write(Sample *begin, uint32_t nbSamples)
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{
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if (m_wp + nbSamples < m_size)
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{
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std::copy(begin, begin+nbSamples, &m_buffer[m_wp]);
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m_wp += nbSamples;
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}
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else // wrap
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{
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int first = m_size - m_wp;
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std::copy(begin, begin+first, &m_buffer[m_wp]);
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int second = nbSamples - first;
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std::copy(begin+first, begin+nbSamples, m_buffer);
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m_wp = second;
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}
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}
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void SDRDaemonChannelSourceBuffer::readOne(Sample& sample)
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{
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sample = m_buffer[m_rp];
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m_rp++;
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if (m_rp == m_size) { // wrap
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m_rp = 0;
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}
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}
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int SDRDaemonChannelSourceBuffer::getRWBalancePercent()
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{
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if (m_wp > m_rp) {
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return (((m_wp - m_rp) - (m_size/2))*100)/m_size;
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} else {
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return (((m_size/2) - (m_rp - m_wp))*100)/m_size;
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}
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} |