mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-30 03:38:55 -05:00
83 lines
3.3 KiB
C
83 lines
3.3 KiB
C
|
///////////////////////////////////////////////////////////////////////////////////
|
||
|
|
// Copyright (C) 2019 Edouard Griffiths, F4EXB //
|
||
|
|
// //
|
||
|
|
// 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 //
|
||
|
|
// (at your option) any later version. //
|
||
|
|
// //
|
||
|
|
// 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/>. //
|
||
|
|
///////////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
#ifndef SDRBASE_DSP_SAMPLESOURCEFIFO_H_
|
||
|
|
#define SDRBASE_DSP_SAMPLESOURCEFIFO_H_
|
||
|
|
|
||
|
|
#include <QObject>
|
||
|
|
#include <QMutex>
|
||
|
|
#include "dsp/dsptypes.h"
|
||
|
|
#include "export.h"
|
||
|
|
|
||
|
|
class SDRBASE_API SampleSourceFifo : public QObject {
|
||
|
|
Q_OBJECT
|
||
|
|
public:
|
||
|
|
SampleSourceFifo(QObject *parent = nullptr);
|
||
|
|
SampleSourceFifo(unsigned int size, QObject *parent = nullptr);
|
||
|
|
~SampleSourceFifo();
|
||
|
|
void resize(unsigned int size);
|
||
|
|
void reset();
|
||
|
|
|
||
|
|
SampleVector& getData() { return m_data; }
|
||
|
|
void read(
|
||
|
|
unsigned int amount,
|
||
|
|
unsigned int& ipart1Begin, unsigned int& ipart1End, // first part offsets where to read
|
||
|
|
unsigned int& ipart2Begin, unsigned int& ipart2End // second part offsets
|
||
|
|
);
|
||
|
|
void write( //!< in place write
|
||
|
|
unsigned int amount,
|
||
|
|
unsigned int& ipart1Begin, unsigned int& ipart1End, // first part offsets where to write
|
||
|
|
unsigned int& ipart2Begin, unsigned int& ipart2End // second part offsets
|
||
|
|
);
|
||
|
|
unsigned int remainder()
|
||
|
|
{
|
||
|
|
QMutexLocker mutexLocker(&m_mutex);
|
||
|
|
return m_readCount;
|
||
|
|
}
|
||
|
|
/** returns ratio of off center over buffer size with sign: negative read lags and positive read leads */
|
||
|
|
float getRWBalance() const
|
||
|
|
{
|
||
|
|
int delta;
|
||
|
|
if (m_writeHead > m_readHead) {
|
||
|
|
delta = (m_size/m_rwDivisor) - (m_writeHead - m_readHead);
|
||
|
|
} else {
|
||
|
|
delta = (m_readHead - m_writeHead) - (m_size/m_rwDivisor);
|
||
|
|
}
|
||
|
|
return delta / (float) m_size;
|
||
|
|
}
|
||
|
|
unsigned int size() const { return m_size; }
|
||
|
|
|
||
|
|
static unsigned int getSizePolicy(unsigned int sampleRate);
|
||
|
|
static const unsigned int m_rwDivisor;
|
||
|
|
static const unsigned int m_guardDivisor;
|
||
|
|
|
||
|
|
signals:
|
||
|
|
void dataRead();
|
||
|
|
|
||
|
|
private:
|
||
|
|
SampleVector m_data;
|
||
|
|
unsigned int m_size;
|
||
|
|
unsigned int m_lowGuard;
|
||
|
|
unsigned int m_highGuard;
|
||
|
|
unsigned int m_midPoint;
|
||
|
|
unsigned int m_readHead;
|
||
|
|
unsigned int m_writeHead;
|
||
|
|
unsigned int m_readCount;
|
||
|
|
QMutex m_mutex;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // SDRBASE_DSP_SAMPLESOURCEFIFO_H_
|