VE7UWU/sdrangel
1
0
Fork 0
mirror of https://github.com/f4exb/sdrangel.git synced 2025-05-28 05:02:25 -04:00
Code Issues Projects Releases Wiki Activity

SDRdaemon plugin: fix auto read/write balance correction

Browse Source
This commit is contained in:
f4exb 2016-03-19 03:49:38 +01:00
parent 8b22d2cbbc
commit 1c0ef544d3
2 changed files with 15 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
plugins/samplesource/sdrdaemon/sdrdaemonbuffer.cpp
View File

@ -64,9 +64,7 @@ SDRdaemonBuffer::SDRdaemonBuffer(uint32_t throttlems) :
m_readCount(0),
m_writeCount(0),
m_nbCycles(0),
m_readCountBal(0),
m_writeCountBal(0),
m_nbReadsBal(0)
m_nbReads(0)
{
m_currentMeta.init();
}
@ -260,13 +258,18 @@ uint8_t *SDRdaemonBuffer::readData(int32_t length)
m_skewCorrection = (dIndex < m_rawSize / 10); // close by 10%
m_nbCycles++;
// auto R/W balance calculation
if (m_nbReadsBal && m_autoCorrBuffer)
if (m_nbReads && m_autoCorrBuffer)
{
int32_t dBytes = (m_writeCountBal - m_readCountBal) / m_nbReadsBal;
m_balCorrection += dBytes / (int32_t) m_iqSampleSize;
m_readCountBal = 0;
m_writeCountBal = 0;
m_nbReadsBal = 0;
int32_t dBytes;
if (m_readIndex > m_writeIndex) { // write leads
dBytes = m_writeIndex; // positive from start of buffer
} else { // read leads
dBytes = m_writeIndex - (int32_t) m_rawSize; // negative from end of buffer
}
m_balCorrection += dBytes / (int32_t) (m_nbReads * m_iqSampleSize); // correction is in number of samples
m_nbReads = 0;
}
else
{
@ -277,8 +280,7 @@ uint8_t *SDRdaemonBuffer::readData(int32_t length)
}
m_readCount += length;
m_readCountBal += length;
m_nbReadsBal++;
m_nbReads++;
if (m_readIndex + length < m_rawSize)
{
@ -389,7 +391,6 @@ void SDRdaemonBuffer::writeToRawBufferUncompressed(const char *array, uint32_t l
}
m_writeCount += length;
m_writeCountBal += length;
}
void SDRdaemonBuffer::resetIndexes()
@ -401,9 +402,7 @@ void SDRdaemonBuffer::resetIndexes()
m_nbCycles = 0;
m_skewTest = false;
m_skewCorrection = false;
m_readCountBal = 0;
m_writeCountBal = 0;
m_nbReadsBal = 0;
m_nbReads = 0;
m_balCorrection = 0;
}

4
plugins/samplesource/sdrdaemon/sdrdaemonbuffer.h
View File

@ -166,9 +166,7 @@ private:
int64_t m_writeCount; //!< Number of bytes written for auto skew compensation
uint32_t m_nbCycles; //!< Number of buffer cycles since start of auto skew compensation byte counting
int64_t m_readCountBal; //!< Number of bytes read for auto R/W balance
int64_t m_writeCountBal; //!< Number of bytes written for auto R/W balance
uint32_t m_nbReadsBal; //!< Number of buffer reads since start of auto R/W balance byte counting
uint32_t m_nbReads; //!< Number of buffer reads since start of auto R/W balance correction period
int32_t m_balCorrection; //!< R/W balance correction in number of samples
};