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SDRdaemon: sample buffer dedicated to channel source

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This commit is contained in:
f4exb 2018-08-27 18:27:09 +02:00
parent c1bd4f6b44
commit 083f31aed4
3 changed files with 129 additions and 0 deletions
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2
sdrdaemon/CMakeLists.txt
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@ -12,6 +12,7 @@ set(sdrdaemon_SOURCES
channel/sdrdaemonchannelsinksettings.cpp
channel/sdrdaemonchannelsourcesettings.cpp
channel/sdrdaemonchannelsourcethread.cpp
channel/sdrdaemonchannelsourcebuffer.cpp
webapi/webapiadapterdaemon.cpp
webapi/webapirequestmapper.cpp
webapi/webapiserver.cpp
@ -30,6 +31,7 @@ set(sdrdaemon_HEADERS
channel/sdrdaemonchannelsinksettings.h
channel/sdrdaemonchannelsourcesettings.h
channel/sdrdaemonchannelsourcethread.h
channel/sdrdaemonchannelsourcebuffer.h
webapi/webapiadapterdaemon.h
webapi/webapirequestmapper.h
webapi/webapiserver.h

85
sdrdaemon/channel/sdrdaemonchannelsourcebuffer.cpp Normal file
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@ -0,0 +1,85 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2018 Edouard Griffiths, F4EXB. //
// //
// SDRdaemon source channel (Tx). Samples buffer //
// //
// SDRdaemon is a detached SDR front end that handles the interface with a //
// physical device and sends or receives the I/Q samples stream to or from a //
// SDRangel instance via UDP. It is controlled via a Web REST API. //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#include "channel/sdrdaemonchannelsourcebuffer.h"
SDRDaemonChannelSourceBuffer::SDRDaemonChannelSourceBuffer(uint32_t nbSamples)
{
m_buffer = new Sample[nbSamples];
m_wp = nbSamples/2;
m_rp = 0;
m_size = nbSamples;
}
SDRDaemonChannelSourceBuffer::~SDRDaemonChannelSourceBuffer()
{
delete[] m_buffer;
}
void SDRDaemonChannelSourceBuffer::resize(uint32_t nbSamples)
{
if (nbSamples > m_size)
{
delete[] m_buffer;
m_buffer = new Sample[nbSamples];
}
m_wp = nbSamples/2;
m_rp = 0;
m_size = nbSamples;
}
void SDRDaemonChannelSourceBuffer::write(Sample *begin, uint32_t nbSamples)
{
if (m_wp + nbSamples < m_size)
{
std::copy(begin, begin+nbSamples, &m_buffer[m_wp]);
m_wp += nbSamples;
}
else // wrap
{
int first = m_size - m_wp;
std::copy(begin, begin+first, &m_buffer[m_wp]);
int second = nbSamples - first;
std::copy(begin+first, begin+nbSamples, m_buffer);
m_wp = second;
}
}
void SDRDaemonChannelSourceBuffer::readOne(Sample& sample)
{
sample = m_buffer[m_rp];
m_rp++;
if (m_rp == m_size) { // wrap
m_rp = 0;
}
}
int SDRDaemonChannelSourceBuffer::getRWBalancePercent()
{
if (m_wp > m_rp) {
return (((m_wp - m_rp) - (m_size/2))*100)/m_size;
} else {
return (((m_size/2) - (m_rp - m_wp))*100)/m_size;
}
}

42
sdrdaemon/channel/sdrdaemonchannelsourcebuffer.h Normal file
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@ -0,0 +1,42 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2018 Edouard Griffiths, F4EXB. //
// //
// SDRdaemon source channel (Tx). Samples buffer //
// //
// SDRdaemon is a detached SDR front end that handles the interface with a //
// physical device and sends or receives the I/Q samples stream to or from a //
// SDRangel instance via UDP. It is controlled via a Web REST API. //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#include <stdint.h>
#include "dsp/dsptypes.h"
class SDRDaemonChannelSourceBuffer
{
public:
SDRDaemonChannelSourceBuffer(uint32_t nbSamples);
~SDRDaemonChannelSourceBuffer();
void resize(uint32_t nbSamples);
void write(Sample *begin, uint32_t nbSamples);
void readOne(Sample& sample);
int getRWBalancePercent(); //!< positive write leads, negative read leads, balance = 0, percentage of buffer size
private:
Sample *m_buffer;
uint32_t m_size;
uint32_t m_rp;
uint32_t m_wp;
};