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SDRdaemonFEC plugin: check frame and block sequence

This commit is contained in:
f4exb 2016-07-15 19:44:02 +02:00
parent 806a3fb87d
commit 1b8199df89
2 changed files with 44 additions and 27 deletions
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70
plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.cpp
View File

@ -109,16 +109,16 @@ void SDRdaemonFECBuffer::rwCorrectionEstimate(int slotIndex)
float rwRatio = (float) (m_nbWrites * sizeof(BufferFrame)) / (float) (m_nbReads * m_readNbBytes);
qDebug() << "SDRdaemonFECBuffer::rwCorrectionEstimate: "
<< " m_nbReads: " << m_nbReads
<< " m_nbWrites: " << m_nbWrites
<< " rwDelta: " << rwDelta
<< " targetPivotSlot: " << targetPivotSlot
<< " targetPivotIndex: " << targetPivotIndex
<< " m_readIndex: " << m_readIndex
<< " normalizedReadIndex: " << normalizedReadIndex
<< " dBytes: " << dBytes
<< " m_balCorrection: " << m_balCorrection;
// qDebug() << "SDRdaemonFECBuffer::rwCorrectionEstimate: "
// << " m_nbReads: " << m_nbReads
// << " m_nbWrites: " << m_nbWrites
// << " rwDelta: " << rwDelta
// << " targetPivotSlot: " << targetPivotSlot
// << " targetPivotIndex: " << targetPivotIndex
// << " m_readIndex: " << m_readIndex
// << " normalizedReadIndex: " << normalizedReadIndex
// << " dBytes: " << dBytes
// << " m_balCorrection: " << m_balCorrection;
//m_balCorrection = dBytes / (int) (m_iqSampleSize * m_nbReads);
m_nbReads = 0;
@ -186,6 +186,7 @@ void SDRdaemonFECBuffer::writeData(char *array, uint32_t length)
{
SuperBlock *superBlock = (SuperBlock *) array;
int frameIndex = superBlock->header.frameIndex;
int blockIndex = superBlock->header.blockIndex;
int decoderIndex = frameIndex % nbDecoderSlots;
if (m_frameHead == -1) // initial state
@ -194,22 +195,34 @@ void SDRdaemonFECBuffer::writeData(char *array, uint32_t length)
m_frameHead = frameIndex;
initReadIndex(); // reset read index
initDecodeAllSlots(); // initialize all slots
m_blockIndex = 0;
}
else if (m_frameHead != frameIndex) // frame break => new frame starts
{
m_decoderIndexHead = decoderIndex; // new decoder slot head
m_frameHead = frameIndex; // new frame head
checkSlotData(decoderIndex); // check slot before re-init
rwCorrectionEstimate(decoderIndex);
initDecodeSlot(decoderIndex); // collect stats and re-initialize current slot
}
if (frameIndex != m_frameHead + 1)
{
qDebug() << "SDRdaemonFECBuffer::writeData: new frame problem start over: " << frameIndex << ":" << m_frameHead << ":" << blockIndex;
m_decoderIndexHead = decoderIndex; // new decoder slot head
m_frameHead = frameIndex;
initReadIndex(); // reset read index
initDecodeAllSlots(); // initialize all slots
}
else
{
m_decoderIndexHead = decoderIndex; // new decoder slot head
m_frameHead = frameIndex; // new frame head
checkSlotData(decoderIndex); // check slot before re-init
rwCorrectionEstimate(decoderIndex);
initDecodeSlot(decoderIndex); // collect stats and re-initialize current slot
}
m_blockIndex = 0;
}
if (m_decoderSlots[decoderIndex].m_blockCount < m_nbOriginalBlocks) // not enough blocks to decode -> store data
{
int blockCount = m_decoderSlots[decoderIndex].m_blockCount;
int recoveryCount = m_decoderSlots[decoderIndex].m_recoveryCount;
int blockIndex = superBlock->header.blockIndex;
m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks[blockCount].Index = blockIndex;
if (blockIndex == 0) // first block with meta
@ -241,24 +254,27 @@ void SDRdaemonFECBuffer::writeData(char *array, uint32_t length)
m_decoderSlots[decoderIndex].m_recoveryCount++;
}
m_decoderSlots[decoderIndex].m_blockCount++;
if ((blockIndex > 0) && (blockIndex <= m_blockIndex))
{
qDebug() << "SDRdaemonFECBuffer::writeData: block out of sequence: " << blockIndex << ":" << m_blockIndex;
}
}
m_decoderSlots[decoderIndex].m_blockCount++;
m_blockIndex = blockIndex;
if (m_decoderSlots[decoderIndex].m_blockCount == m_nbOriginalBlocks) // ready to decode
{
m_decoderSlots[decoderIndex].m_decoded = true;
if (m_decoderSlots[decoderIndex].m_metaRetrieved) // block zero with its meta data has been received
{
m_currentMeta = *((MetaDataFEC *) &m_decoderSlots[decoderIndex].m_blockZero);
}
if (m_decoderSlots[decoderIndex].m_recoveryCount > 0) // recovery data used => need to decode FEC
{
if (m_decoderSlots[decoderIndex].m_metaRetrieved) // block zero with its meta data has been received
{
MetaDataFEC *metaData = (MetaDataFEC *) &m_decoderSlots[decoderIndex].m_blockZero;
m_paramsCM256.RecoveryCount = metaData->m_nbFECBlocks;
}
else
{
m_paramsCM256.RecoveryCount = m_currentMeta.m_nbFECBlocks; // take last stored value for number of FEC blocks
}
m_paramsCM256.RecoveryCount = m_currentMeta.m_nbFECBlocks; // take last stored value for number of FEC blocks
if (cm256_decode(m_paramsCM256, m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks)) // failure to decode
{

1
plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.h
View File

@ -165,6 +165,7 @@ private:
int m_readIndex; //!< current byte read index in frames buffer
int m_wrDeltaEstimate; //!< Sampled estimate of write to read indexes difference
int m_readNbBytes; //!< Nominal number of bytes per read (50ms)
int m_blockIndex; //!< Stored block index for verification
uint32_t m_throttlemsNominal; //!< Initial throttle in ms
uint8_t* m_readBuffer; //!< Read buffer to hold samples when looping back to beginning of raw buffer