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SDRdaemonFEC support. auto R/W correction

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This commit is contained in:
f4exb
2016-07-13 03:31:19 +02:00
parent 95804345d5
commit c8785c94bb
4 changed files with 82 additions and 12 deletions
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plugins/samplesource/sdrdaemonfec/sdrdaemonfecbuffer.h
+11 -6
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@@ -24,9 +24,9 @@
#include "util/movingaverage.h"
#define SDRDAEMONFEC_UDPSIZE 512 // UDP payload size
#define SDRDAEMONFEC_NBORIGINALBLOCKS 128 // number of sample blocks per frame excluding FEC blocks
#define SDRDAEMONFEC_NBDECODERSLOTS 16 // power of two sub multiple of uint16_t size. A too large one is superfluous.
#define SDRDAEMONFEC_UDPSIZE 512 // UDP payload size
#define SDRDAEMONFEC_NBORIGINALBLOCKS 128 // number of sample blocks per frame excluding FEC blocks
#define SDRDAEMONFEC_NBDECODERSLOTS 16 // power of two sub multiple of uint16_t size. A too large one is superfluous.
class SDRdaemonFECBuffer
{
@@ -99,7 +99,7 @@ public:
float getAvgNbRecovery() const { return m_avgNbRecovery; }
float getBufferLengthInSecs() const { return m_bufferLenSec; }
int32_t getRWBalanceCorrection(int throttlems) const { return m_balCorrection; }
int32_t getRWBalanceCorrection() const { return m_balCorrection; }
/** Get buffer gauge value in % of buffer size ([-50:50])
* [-50:0] : write leads or read lags
@@ -164,17 +164,22 @@ private:
MovingAverage<int, int, 10> m_avgNbRecovery; //!< (stats) average number of recovery blocks used
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)
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
uint32_t m_readSize; //!< Read buffer size
int32_t m_balCorrection; //!< R/W balance correction in number of samples per nominal tick period
float m_bufferLenSec;
int m_nbReads; //!< Number of buffer reads since start of auto R/W balance correction period
int m_nbWrites; //!< Number of buffer writes since start of auto R/W balance correction period
int m_balCorrection; //!< R/W balance correction in number of samples
int m_balCorrLimit; //!< Correction absolute value limit in number of samples
void initDecodeAllSlots();
void initReadIndex();
void rwSkewEstimate(int slotIndex);
void rwCorrectionEstimate(int slotIndex);
void checkSlotData(int slotIndex);
void initDecodeSlot(int slotIndex);