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ogn-rf.cc
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ogn-rf.cc
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/*
OGN - Open Glider Network - http://glidernet.org/
Copyright (c) 2015 The OGN Project
A detailed list of copyright holders can be found in the file "AUTHORS".
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, either 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 for more details.
You should have received a copy of the GNU General Public License
along with this software. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <unistd.h>
#include <math.h>
#include <limits.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <libconfig.h>
#include <algorithm>
#include "thread.h" // multi-thread stuff
#include "fft.h" // Fast Fourier Transform
#include "rtlsdr.h" // SDR radio
#define QUOTE(name) #name
#define STR(macro) QUOTE(macro)
#ifndef VERSION
#define VERSION 0.0.0
#endif
#include "freqplan.h"
#include "jpeg.h"
#include "socket.h"
#include "sysmon.h"
#include "pulsefilter.h"
#include "tonefilter.h"
#include "dataserver.h"
// ==================================================================================================
template <class Float> // scale floating-point data to 8-bit gray scale image
void LogImage(SampleBuffer<uint8_t> &Image, SampleBuffer<Float> &Data, Float LogRef=0, Float Scale=1, Float Bias=0)
{ Image.Allocate(Data);
int Pixels=Data.Full;
for(int Idx=0; Idx<Pixels; Idx++)
{ Float Pixel=Data.Data[Idx];
if(LogRef)
{ if(Pixel) { Pixel=logf((Float)Pixel/LogRef); Pixel = Pixel*Scale + Bias; }
else { Pixel=0; } }
else
{ Pixel = Pixel*Scale + Bias; }
if(Pixel<0x00) Pixel=0x00;
else if(Pixel>0xFF) Pixel=0xFF;
Image.Data[Idx]=(uint8_t)Pixel;
}
Image.Full=Pixels;
}
// ==================================================================================================
class RF_Acq // acquire wideband (1MHz) RF data thus both OGN frequencies at same time
{ public:
int SampleRate; // [Hz] sampling rate
int OGN_GainMode; // 0=Auto, 1=Manual, 2=Linearity, 3=Sensitivity
int OGN_Gain; // [0.1dB] Rx gain for OGN reception
double OGN_StartTime; // [sec] when to start acquisition on the center frequency
int OGN_SamplesPerRead; // [samples] should correspond to about 800 ms of data and be a multiple of 256
// the goal is to listen on center frequency from 0.4 to 1.2 sec
FreqPlan HoppingPlan; // frequency hopping plan (depends on the world region)
int DeviceIndex; // rtl-sdr device index
char DeviceSerial[64]; // serial number of the rtl-sdr device to be selected
int OffsetTuning; // [bool] this option might be good for E4000 tuner
int BiasTee; // [bool] T-bias for external LNA power
int FreqCorr; // [ppm] frequency correction applied to the Rx chip
int FreqRaster; // [Hz] use only center frequencies on this raster to avoid tuning inaccuracies
RTLSDR SDR; // SDR receiver (DVB-T stick)
ReuseObjectQueue< SampleBuffer<uint8_t> > OutQueue; // OGN sample batches are sent there
Thread Thr; // acquisition thread
volatile int StopReq; // request to stop the acquisition thread
PulseFilter PulseFilt;
static const int GSM_GainMode = 1; // Manual gain mode for GSM
int GSM_Gain; // [0.1dB] Rx gain for GSM frequency calibration
int GSM_CenterFreq; // [Hz] should be selected to cover at lease one broadcast channel in the area
int GSM_Scan; // [bool] scan around the whole GSM band
int GSM_SamplesPerRead; // [samples] should cover one or more frequency correction bursts (100 ms should be enough ?)
volatile float GSM_FreqCorr; // [ppm] frequency correction measured by the GSM frequency calibration
static const int GSM_LowEdge = 925100000; // [Hz] E-GSM-900 band, excluding the guards of 100kHz
static const int GSM_UppEdge = 959900000; // [Hz]
static const int GSM_ScanStep = 800000; // [Hz]
ReuseObjectQueue< SampleBuffer<uint8_t> > GSM_OutQueue; // GSM sample batches are sent there
const static uint32_t OGN_RawDataSync = 0x254F7D01;
char FilePrefix[16];
int OGN_SaveRawData;
MessageQueue<Socket *> RawDataQueue; // sockets send to this queue should be written with a most recent raw data
MessageQueue<Socket *> SpectrogramQueue; // sockets send to this queue should be written with a most recent spectrogram
DFT1d<float> SpectrogramFFT; // FFT to create spectrograms
int SpectrogramFFTsize;
float *SpectrogramWindow;
SampleBuffer< std::complex<float> > SpectraBuffer;
SampleBuffer<float> SpectraPwr;
SampleBuffer<uint8_t> Image;
JPEG JpegImage;
time_t StartTime;
uint32_t CountAllTimeSlots;
uint32_t CountLifeTimeSlots;
public:
RF_Acq() { Config_Defaults();
GSM_FreqCorr=0;
// PulseBox.Preset(PulseBoxSize);
SpectrogramWindow=0;
StartTime=0; CountAllTimeSlots=0; CountLifeTimeSlots=0;
StopReq=0; Thr.setExec(ThreadExec); }
~RF_Acq() { if(SpectrogramWindow) free(SpectrogramWindow); }
double getLifeTime(void)
{ time_t Now; time(&Now); if(Now<=StartTime) return 0;
return 0.5*CountLifeTimeSlots/(Now-StartTime); }
void Config_Defaults(void)
{ SampleRate=1000000;
OGN_StartTime=0.375; OGN_SamplesPerRead=(850*SampleRate)/1000;
OGN_GainMode=1; OGN_Gain=600;
HoppingPlan.setPlan(0);
PulseFilt.Threshold=0;
DeviceIndex=0; DeviceSerial[0]=0;
OffsetTuning=0; FreqCorr=0; FreqRaster=28125; BiasTee=(-1);
// GSM_CenterFreq=GSM_LowEdge+GSM_ScanStep/2; GSM_Scan=1; GSM_SamplesPerRead=(250*SampleRate)/1000; GSM_Gain=200;
GSM_CenterFreq=0; GSM_Scan=0; GSM_Gain=200;
SpectrogramFFTsize=0;
OGN_SaveRawData=0;
FilePrefix[0]=0; }
int config_lookup_float_or_int(config_t *Config, const char *Path, double *Value)
{ int Ret = config_lookup_float(Config, Path, Value); if(Ret==CONFIG_TRUE) return Ret;
int IntValue; Ret = config_lookup_int(Config, Path, &IntValue); if(Ret==CONFIG_TRUE) { (*Value) = IntValue; return Ret; }
return Ret; }
int Config(config_t *Config)
{ const char *Call=0;
config_lookup_string(Config,"APRS.Call", &Call);
if(Call) strcpy(FilePrefix, Call);
double Corr=0.0;
config_lookup_float_or_int(Config, "RF.FreqCorr", &Corr); FreqCorr = (int)floor(Corr+0.5);
config_lookup_int(Config, "RF.FreqRaster", &FreqRaster);
config_lookup_int(Config, "RF.Device", &DeviceIndex);
const char *Serial = 0;
config_lookup_string(Config,"RF.DeviceSerial", &Serial);
if(Serial) { strncpy(DeviceSerial, Serial, 64); DeviceSerial[63]=0; }
config_lookup_int(Config, "RF.OfsTune", &OffsetTuning);
config_lookup_int(Config, "RF.BiasTee", &BiasTee);
config_lookup_int(Config, "RF.OGN.GainMode", &OGN_GainMode);
config_lookup_int(Config, "RF.OGN.SaveRawData", &OGN_SaveRawData);
SampleRate=1000000;
if(config_lookup_int(Config, "RF.OGN.SampleRate", &SampleRate)!=CONFIG_TRUE)
{ double Rate;
if(config_lookup_float(Config, "RF.OGN.SampleRate", &Rate)==CONFIG_TRUE) SampleRate=(int)floor(1e6*Rate+0.5);
else if(config_lookup_int(Config, "RF.SampleRate", &SampleRate)!=CONFIG_TRUE)
{ if(config_lookup_float(Config, "RF.SampleRate", &Rate)==CONFIG_TRUE) SampleRate=(int)floor(1e6*Rate+0.5); }
}
double InpGain= 60.0; config_lookup_float_or_int(Config, "RF.OGN.Gain", &InpGain); OGN_Gain=(int)floor(InpGain*10+0.5);
InpGain= 20.0; config_lookup_float_or_int(Config, "RF.GSM.Gain", &InpGain); GSM_Gain=(int)floor(InpGain*10+0.5);
double Freq = 0; config_lookup_float_or_int(Config, "RF.GSM.CenterFreq", &Freq); GSM_CenterFreq=(int)floor(Freq*1e6+0.5);
GSM_Scan = 0; config_lookup_int(Config, "RF.GSM.Scan", &GSM_Scan);
int PosOK=0;
int Latitude, Longitude;
if(config_lookup_int(Config, "Position.Latitude", &Latitude)!=CONFIG_TRUE)
{ double Lat;
if(config_lookup_float(Config, "Position.Latitude", &Lat)==CONFIG_TRUE)
{ Latitude=(int)floor(Lat*1e7+0.5); }
else PosOK=(-1); }
if(config_lookup_int(Config, "Position.Longitude", &Longitude)!=CONFIG_TRUE)
{ double Lon;
if(config_lookup_float(Config, "Position.Longitude", &Lon)==CONFIG_TRUE)
{ Longitude=(int)floor(Lon*1e7+0.5); }
else PosOK=(-1); }
int Plan=0;
config_lookup_int(Config, "RF.FreqPlan", &Plan);
if( (Plan==0) && (PosOK>=0) )
{ Plan=HoppingPlan.calcPlan(Latitude/50*3, Longitude/50*3); } // decide hopping plan from position
HoppingPlan.setPlan(Plan);
PulseFilt.Threshold=0;
config_lookup_int(Config, "RF.PulseFilter.Threshold", &PulseFilt.Threshold);
config_lookup_float(Config, "RF.OGN.StartTime", &OGN_StartTime);
double SensTime=0.850;
config_lookup_float(Config, "RF.OGN.SensTime", &SensTime);
OGN_SamplesPerRead=(int)floor(SensTime*SampleRate+0.5);
SensTime=0.250;
config_lookup_float(Config, "RF.GSM.SensTime", &SensTime);
GSM_SamplesPerRead=(int)floor(SensTime*SampleRate+0.5);
SpectrogramFFTsize=(8*SampleRate)/15625;
SpectrogramFFT.PresetForward(SpectrogramFFTsize);
SpectrogramWindow=(float *)realloc(SpectrogramWindow, SpectrogramFFTsize*sizeof(float));
SpectrogramFFT.SetSineWindow(SpectrogramWindow, SpectrogramFFTsize, (float)(1.0/sqrt(SpectrogramFFTsize)) );
return 0; }
int QueueSize(void) { return OutQueue.Size(); }
int Start(void) { StopReq=0; return Thr.Create(this); }
int Stop(void) { StopReq=1; return Thr.Join(); }
static void *ThreadExec(void *Context)
{ RF_Acq *This = (RF_Acq *)Context; return This->Exec(); }
void *Exec(void)
{ // printf("RF_Acq.Exec() ... Start\n");
time(&StartTime); CountAllTimeSlots=0; CountLifeTimeSlots=0;
char Header[256];
int Priority = Thr.getMaxPriority(); Thr.setPriority(Priority);
int CurrCenterFreq = calcCenterFreq(0);
while(!StopReq)
{ if(SDR.isOpen()) // if device is already open
{ double Now = SDR.getTime();
int IntTimeNow = (int)floor(Now);
int ReadGSM = (GSM_CenterFreq>0) && ((IntTimeNow%30) == 0); // do the GSM calibration every 30 seconds
int NextCenterFreq = calcCenterFreq(IntTimeNow+1); // next center frequency for OGN
double FracTimeNow = Now-IntTimeNow;
double WaitTime = OGN_StartTime-FracTimeNow; if(WaitTime<0) WaitTime+=1.0;
int SamplesToRead=OGN_SamplesPerRead;
int LifeSlots=2;
if( ReadGSM || (QueueSize()>1) ) { SamplesToRead/=2; LifeSlots=1; } // when GSM calibration or data is not being processed fast enough we only read half-time
if(WaitTime<0.200)
{ usleep((int)floor(1e6*WaitTime+0.5)); // wait right before the time slot starts
SampleBuffer<uint8_t> *Buffer = OutQueue.New(); // get the next buffer to fill with raw I/Q data
SDR.ResetBuffer(); // needed before every Read()
int Read=SDR.Read(*Buffer, SamplesToRead); // read the time slot raw RF data
if(Read>0) // RF data Read() successful
{ Buffer->Freq += Buffer->Freq * (1e-6*GSM_FreqCorr); // correct the frequency (sign ?)
if(OGN_SaveRawData>0)
{ time_t Time=(time_t)floor(Buffer->Time);
struct tm *TM = gmtime(&Time);
char FileName[32]; sprintf(FileName, "%s_%04d.%02d.%02d.u8", FilePrefix, 1900+TM->tm_year, TM->tm_mon+1, TM->tm_mday);
FILE *File=fopen(FileName, "ab");
if(File)
{ Serialize_WriteSync(File, OGN_RawDataSync);
Buffer->Serialize(File);
fclose(File);
OGN_SaveRawData--; }
}
PulseFilt.Process(*Buffer);
if(QueueSize()>1) printf("RF_Acq.Exec() ... Half time slot\n");
// printf("RF_Acq.Exec() ... SDR.Read() => %d, Time=%16.3f, Freq=%6.1fMHz\n", Read, Buffer->Time, 1e-6*Buffer->Freq);
while(RawDataQueue.Size()) // when a raw data for this slot was requested
{ Socket *Client; RawDataQueue.Pop(Client);
sprintf(Header, "HTTP/1.1 200 OK\r\nCache-Control: no-cache\r\nContent-Type: audio/basic\r\n\
Content-Disposition: attachment; filename=\"%s_%07.3fMHz_%03.1fMsps_%14.3fsec.u8\"\r\n\r\n", FilePrefix, 1e-6*Buffer->Freq, 1e-6*Buffer->Rate, Buffer->Time);
Client->Send(Header);
Client->Send(Buffer->Data, Buffer->Full);
Client->SendShutdown(); Client->Close(); delete Client; }
if(SpectrogramQueue.Size())
{ SlidingFFT(SpectraBuffer, *Buffer, SpectrogramFFT, SpectrogramWindow);
SpectraPower(SpectraPwr, SpectraBuffer); // calc. spectra power
float BkgNoise=0.33;
LogImage(Image, SpectraPwr, (float)BkgNoise, (float)32.0, (float)32.0); // make the image
JpegImage.Compress_MONO8(Image.Data, Image.Len, Image.Samples() ); } // and into JPEG
while(SpectrogramQueue.Size())
{ Socket *Client; SpectrogramQueue.Pop(Client);
sprintf(Header, "HTTP/1.1 200 OK\r\nCache-Control: no-cache\r\nContent-Type: image/jpeg\r\nRefresh: 5\r\n\
Content-Disposition: attachment; filename=\"%s_%07.3fMHz_%03.1fMsps_%10dsec.jpg\"\r\n\r\n",
FilePrefix, 1e-6*SpectraBuffer.Freq, 1e-6*SpectraBuffer.Rate*SpectraBuffer.Len/2, (uint32_t)floor(SpectraBuffer.Date+SpectraBuffer.Time));
Client->Send(Header);
Client->Send(JpegImage.Data, JpegImage.Size);
Client->SendShutdown(); Client->Close(); delete Client; }
if(OutQueue.Size()<4) { OutQueue.Push(Buffer); CountLifeTimeSlots+=LifeSlots; }
else { OutQueue.Recycle(Buffer); printf("RF_Acq.Exec() ... Dropped a slot\n"); }
} else // RF data Read() failed
{ SDR.Close(); printf("RF_Acq.Exec() ... SDR.Read() failed => SDR.Close()\n"); continue; }
if(ReadGSM) // if we are to read GSM in the second half-slot
{ SDR.setCenterFreq(GSM_CenterFreq); // setup for the GSM reception
SDR.setTunerGainMode(GSM_GainMode);
SDR.setTunerGain(GSM_Gain);
GSM_FreqCorr-=(FreqCorr-SDR.getFreqCorrection()); // this is just in case someone changed the frequency correction live
SDR.setFreqCorrection(FreqCorr);
SampleBuffer<uint8_t> *Buffer = GSM_OutQueue.New();
SDR.ResetBuffer();
int Read=SDR.Read(*Buffer, GSM_SamplesPerRead);
// printf("RF_Acq.Exec() ...(GSM) SDR.Read() => %d, Time=%16.3f, Freq=%6.1fMHz\n", Read, Buffer->Time, 1e-6*Buffer->Freq);
if(Read>0)
{ if(GSM_OutQueue.Size()<3) GSM_OutQueue.Push(Buffer);
else { GSM_OutQueue.Recycle(Buffer); printf("RF_Acq.Exec() ... Dropped a GSM batch\n"); }
}
SDR.setTunerGainMode(OGN_GainMode);
SDR.setTunerGain(OGN_Gain); // back to OGN reception setup
if(GSM_Scan)
{ GSM_CenterFreq+=GSM_ScanStep;
if(GSM_CenterFreq>=GSM_UppEdge) GSM_CenterFreq=GSM_LowEdge+GSM_ScanStep/2;
}
}
// if(ReadGSM | OGN_FreqHopChannels)
{ SDR.setCenterFreq(NextCenterFreq); CurrCenterFreq=NextCenterFreq; }
}
else usleep(100000);
}
else // if not open yet or was closed due to an error
{ int Index=(-1);
if(DeviceSerial[0]) Index=SDR.getDeviceIndexBySerial(DeviceSerial);
if(Index<0) Index=DeviceIndex;
SDR.FreqRaster = FreqRaster;
if(SDR.Open(Index, CurrCenterFreq, SampleRate)<0) // try to open it
{ printf("RF_Acq.Exec() ... SDR.Open(%d, , ) fails, retry after 1 sec\n", Index); usleep(1000000); }
else
{ SDR.setOffsetTuning(OffsetTuning);
if(BiasTee>=0) SDR.setBiasTee(BiasTee);
SDR.setTunerGainMode(OGN_GainMode);
SDR.setTunerGain(OGN_Gain);
SDR.setFreqCorrection(FreqCorr); }
}
}
SDR.Close();
// printf("RF_Acq.Exec() ... Stop\n");
return 0; }
int calcCenterFreq(uint32_t Time)
{ int HopFreq[4];
HopFreq[0] = HoppingPlan.getFrequency(Time, 0, 0);
HopFreq[1] = HoppingPlan.getFrequency(Time, 0, 1);
HopFreq[2] = HoppingPlan.getFrequency(Time, 1, 0);
HopFreq[3] = HoppingPlan.getFrequency(Time, 1, 1);
int MidFreq0 = (HopFreq[0]+HopFreq[1]+1)>>1;
// int MidFreq1 = (HopFreq[2]+HopFreq[3]+1)>>1;
// int MidFreq = (MidFreq0+MidFreq1+1)>>1;
// int FreqDiff = MidFreq1-MidFreq0;
int CenterFreq = MidFreq0;
int Band = SampleRate-150000;
std::sort(HopFreq, HopFreq+4);
// if(abs(FreqDiff)<HalfBand) CenterFreq = MidFreq;
if((HopFreq[3]-HopFreq[0])<Band) CenterFreq=(HopFreq[0]+HopFreq[3]+1)>>1;
else if((HopFreq[2]-HopFreq[0])<Band) CenterFreq=(HopFreq[0]+HopFreq[2]+1)>>1;
else if((HopFreq[3]-HopFreq[1])<Band) CenterFreq=(HopFreq[1]+HopFreq[3]+1)>>1;
// printf("calcCenterFreq(%d): %5.1f-%5.1f-%5.1f-%5.1f [%5.1f] => %5.1f [MHz] %c\n",
// Time, 1e-6*HopFreq[0], 1e-6*HopFreq[1], 1e-6*HopFreq[2], 1e-6*HopFreq[3], 1e-6*CenterFreq,
// 1e-6*(HopFreq[3]-HopFreq[0]), CenterFreq!=MidFreq0?'*':' ');
return CenterFreq; }
} ;
// ==================================================================================================
template <class Float>
class Inp_Filter
{ public:
Thread Thr; // processing thread
volatile int StopReq;
RF_Acq *RF;
int Enable;
ToneFilter<Float> ToneFilt;
ReuseObjectQueue< SampleBuffer< std::complex<Float> > > OutQueue;
public:
Inp_Filter(RF_Acq *RF)
{ this->RF=RF; Config_Defaults(); Preset(); }
void Config_Defaults(void)
{ Enable = 0; ToneFilt.FFTsize = 32768; ToneFilt.Threshold=32; }
int Config(config_t *Config)
{ config_lookup_int(Config, "RF.ToneFilter.Enable", &Enable);
config_lookup_int(Config, "RF.ToneFilter.FFTsize", &ToneFilt.FFTsize);
config_lookup_float(Config, "RF.ToneFilter.Threshold", &ToneFilt.Threshold);
return 0; }
int Preset(void) { return ToneFilt.Preset(); }
int QueueSize(void) { return OutQueue.Size(); }
void Start(void)
{ StopReq=0; Thr.setExec(ThreadExec); Thr.Create(this); }
~Inp_Filter()
{ Thr.Cancel(); }
double getCPU(void) // get CPU time for this thread
{
#if !defined(__MACH__)
struct timespec now; clock_gettime(CLOCK_THREAD_CPUTIME_ID, &now); return now.tv_sec + 1e-9*now.tv_nsec;
#else
return 0;
#endif
}
static void *ThreadExec(void *Context)
{ Inp_Filter<Float> *This = (Inp_Filter<Float> *)Context; return This->Exec(); }
void *Exec(void)
{ // printf("Inp_Filter.Exec() ... Start\n");
while(!StopReq)
{ if(!Enable) { sleep(1); continue; }
double ExecTime=getCPU();
SampleBuffer<uint8_t> *InpBuffer = RF->OutQueue.Pop(); // here we wait for a new data batch
// printf("Inp_Filter.Exec() ... Input(%5.3fMHz, %5.3fsec, %dsamples)\n", 1e-6*InpBuffer->Freq, InpBuffer->Time, InpBuffer->Full/2);
SampleBuffer< std::complex<Float> > *OutBuffer = OutQueue.New();
ToneFilt.Process(OutBuffer, InpBuffer);
RF->OutQueue.Recycle(InpBuffer); // let the input buffer go free
// printf("Inp_Filter.Exec() ... Output(%5.3fMHz, %5.3fsec, %dsamples)\n", 1e-6*OutBuffer->Freq, OutBuffer->Time, OutBuffer->Full/2);
if(OutQueue.Size()<4) { OutQueue.Push(OutBuffer); }
else { OutQueue.Recycle(OutBuffer); printf("Inp_Filter.Exec() ... Dropped a slot\n"); }
ExecTime=getCPU()-ExecTime; // printf("Inp_FFT.Exec() ... %5.3fsec\n", ExecTime);
}
// printf("Inp_FFT.Exec() ... Stop\n");
return 0; }
// classical sliding box filter - calc. the sum within box of 2*Radius+1
static void BoxSum(Float *Output, Float *Input, int Size, int Radius)
{ int BoxSize=2*Radius+1;
Float Sum=0; int InpIdx=0; int OutIdx=0;
for( ; InpIdx<Radius; InpIdx++)
{ Sum+=Input[InpIdx]; }
for( ; InpIdx<BoxSize; InpIdx++)
{ Sum+=Input[InpIdx]; Output[OutIdx++]=Sum; }
for( ; InpIdx<Size; InpIdx++)
{ Sum+=Input[InpIdx]-Input[InpIdx-BoxSize]; Output[OutIdx++]=Sum; }
for( ; OutIdx<Size; )
{ Sum-=Input[InpIdx-BoxSize]; Output[OutIdx++]=Sum; }
}
} ;
// ==================================================================================================
template <class Float>
class Inp_FFT // FFT of the RF data
{ public:
Thread Thr; // processing thread
volatile int StopReq;
RF_Acq *RF;
Inp_Filter<Float> *Filter;
int FFTsize;
#ifdef USE_RPI_GPU_FFT
RPI_GPU_FFT FFT;
#else
DFT1d<Float> FFT;
#endif
Float *Window;
SampleBuffer< std::complex<Float> > OutBuffer;
char OutPipeName[32]; // name of the pipe to send the RF data (as FFT) to the demodulator and decoder.
int OutPipe;
TCP_DataServer DataServer;
const static uint32_t OutPipeSync = 0x254F7D00 + sizeof(Float);
public:
Inp_FFT(RF_Acq *RF, Inp_Filter<Float> *Filter=0)
{ Window=0; this->RF=RF; this->Filter=Filter; Preset(); OutPipe=(-1); Config_Defaults(); }
void Config_Defaults(void)
{ strcpy(OutPipeName, "ogn-rf.fifo"); }
int Config(config_t *Config)
{ const char *PipeName = "ogn-rf.fifo";
config_lookup_string(Config, "RF.PipeName", &PipeName);
strcpy(OutPipeName, PipeName);
return 0; }
int Preset(void) { return Preset(RF->SampleRate); }
int Preset(int SampleRate)
{ FFTsize=(8*8*SampleRate)/15625;
FFT.PresetForward(FFTsize);
Window=(Float *)realloc(Window, FFTsize*sizeof(Float));
FFT.SetSineWindow(Window, FFTsize, (Float)(1.0/sqrt(FFTsize)) );
return 1; }
int SerializeSpectra(int OutPipe)
{ int Len=Serialize_WriteSync(OutPipe, OutPipeSync);
if(Len>=0) { Len=Serialize_WriteName(OutPipe, "FreqCorr"); }
if(Len>=0) { Len=Serialize_WriteData(OutPipe, (void *)&(RF->FreqCorr), sizeof(int) ); }
if(Len>=0) { Len=Serialize_WriteData(OutPipe, (void *)&(RF->GSM_FreqCorr), sizeof(float) ); }
if(Len>=0) { Len=Serialize_WriteSync(OutPipe, OutPipeSync); }
if(Len>=0) { Len=Serialize_WriteName(OutPipe, "Spectra"); }
if(Len>=0) { Len=OutBuffer.Serialize(OutPipe); }
return Len; }
int WriteToPipe(void) // write OutBuffer to the output pipe
{ if( (OutPipe<0) && (!DataServer.isListenning()) )
{ const char *Colon=strchr(OutPipeName, ':');
if(Colon)
{ int Port=atoi(Colon+1);
if(DataServer.Listen(Port)<0)
printf("Inp_FFT.Exec() ... cannot open data server on port %d\n", Port);
else
printf("Inp_FFT.Exec() ... data server listenning on port %d\n", Port);
}
else
{ OutPipe=open(OutPipeName, O_WRONLY);
if(OutPipe<0)
{ printf("Inp_FFT.Exec() ... Cannot open %s\n", OutPipeName);
// here we could try to create the missing pipe
if(mkfifo(OutPipeName, 0666)<0)
printf("Inp_FFT.Exec() ... Cannot create %s\n", OutPipeName);
else
{ printf("Inp_FFT.Exec() ... %s has been created\n", OutPipeName);
OutPipe=open(OutPipeName, O_WRONLY); }
}
}
if( (OutPipe<0) && (!DataServer.isListenning()) ) return -1;
}
if(DataServer.isListenning())
{ for(int Idx=0; Idx<DataServer.Clients(); Idx++) // loop over clients
{ int Len=SerializeSpectra(DataServer.Client[Idx]); // serialize same data to every client
if(Len<0)
{ printf("Inp_FFT.Exec() ... Dropped a client\n");
DataServer.Close(Idx); } // if anything goes wrong: close this client
}
int Ret=DataServer.RemoveClosed(); // remove closed clients from the list
Ret=DataServer.Accept(); // check for more clients who might be waiting to connect
if(Ret>0) printf("Inp_FFT.Exec() ... Accepted new client (%d clients now)\n", DataServer.Clients() );
}
if(OutPipe>=0)
{ int Len=SerializeSpectra(OutPipe);
if(Len<0) { printf("Inp_FFT.Exec() ... Error while writing to %s\n", OutPipeName); close(OutPipe); OutPipe=(-1); return -1; }
}
return 0; }
void Start(void)
{ StopReq=0; Thr.setExec(ThreadExec); Thr.Create(this); }
~Inp_FFT()
{ Thr.Cancel();
if(Window) free(Window); }
double getCPU(void) // get CPU time for this thread
{
#if !defined(__MACH__)
struct timespec now; clock_gettime(CLOCK_THREAD_CPUTIME_ID, &now); return now.tv_sec + 1e-9*now.tv_nsec;
#else
return 0;
#endif
}
static void *ThreadExec(void *Context)
{ Inp_FFT *This = (Inp_FFT *)Context; return This->Exec(); }
void *Exec(void)
{ // printf("Inp_FFT.Exec() ... Start\n");
while(!StopReq)
{ double ExecTime=getCPU();
#ifndef USE_RPI_GPU_FFT
if(Filter && Filter->Enable)
{ SampleBuffer< std::complex<Float> > *InpBuffer = Filter->OutQueue.Pop();
// printf("Inp_FFT.Exec() ... (%5.3fMHz, %5.3fsec, %dsamples)\n", 1e-6*InpBuffer->Freq, InpBuffer->Time, InpBuffer->Full/2);
SlidingFFT(OutBuffer, *InpBuffer, FFT, Window); // Process input samples, produce FFT spectra
Filter->OutQueue.Recycle(InpBuffer);
}
else
#endif
{ SampleBuffer<uint8_t> *InpBuffer = RF->OutQueue.Pop(); // here we wait for a new data batch
// printf("Inp_FFT.Exec() ... (%5.3fMHz, %5.3fsec, %dsamples)\n", 1e-6*InpBuffer->Freq, InpBuffer->Time, InpBuffer->Full/2);
SlidingFFT(OutBuffer, *InpBuffer, FFT, Window); // Process input samples, produce FFT spectra
RF->OutQueue.Recycle(InpBuffer);
}
WriteToPipe(); // here we send the FFT spectra in OutBuffer to the demodulator
ExecTime=getCPU()-ExecTime; // printf("Inp_FFT.Exec() ... %5.3fsec\n", ExecTime);
}
// printf("Inp_FFT.Exec() ... Stop\n");
if(OutPipe>=0) { close(OutPipe); OutPipe=(-1); }
return 0; }
} ;
// ==================================================================================================
template <class Float>
class GSM_FFT // FFT of the GSM RF data
{ public:
Thread Thr; // processing thread
volatile int StopReq;
RF_Acq *RF; // pointer to the RF acquisition
int FFTsize;
DFT1d<Float> FFT;
Float *Window;
SampleBuffer< std::complex<Float> > Spectra; // (complex) spectra
SampleBuffer< Float > Power; // spectra power (energy)
MessageQueue<Socket *> SpectrogramQueue; // sockets send to this queue should be written with a most recent spectrogram
SampleBuffer<uint8_t> Image;
JPEG JpegImage;
std::vector<Float> PPM_Values; // [ppm] measured frequency correction values (a vector of)
Float PPM_Aver; // [ppm] average frequency correction
Float PPM_RMS; // [ppm] RMS of the frequency correction
int PPM_Points; // number of measurements taken into the average
time_t PPM_Time; // time when correction measured
Float getPPM(void) const { Float Value=PPM_Aver; return Value; }
public:
GSM_FFT(RF_Acq *RF)
{ Window=0; this->RF=RF; Preset(); }
int Preset(void) { return Preset(RF->SampleRate); }
int Preset(int SampleRate)
{ FFTsize=(8*SampleRate)/15625;
FFT.PresetForward(FFTsize);
Window=(Float *)realloc(Window, FFTsize*sizeof(Float));
FFT.SetSineWindow(Window, FFTsize, (Float)(1.0/sqrt(FFTsize)) );
PPM_Values.clear(); PPM_Aver=0; PPM_RMS=0; PPM_Points=0; PPM_Time=0;
return 1; }
void Start(void)
{ StopReq=0; Thr.setExec(ThreadExec); Thr.Create(this); }
~GSM_FFT()
{ Thr.Cancel();
if(Window) free(Window); }
double getCPU(void) // get CPU time for this thread
{
#if !defined(__MACH__)
struct timespec now; clock_gettime(CLOCK_THREAD_CPUTIME_ID, &now); return now.tv_sec + 1e-9*now.tv_nsec;
#else
return 0.0;
#endif
}
static void *ThreadExec(void *Context)
{ GSM_FFT *This = (GSM_FFT *)Context; return This->Exec(); }
void *Exec(void)
{ // printf("GSM_FFT.Exec() ... Start\n");
while(!StopReq)
{ double ExecTime=getCPU();
SampleBuffer<uint8_t> *InpBuffer = RF->GSM_OutQueue.Pop(); // get data sample on a GSM frequency
// printf("GSM_FFT.Exec() ... (%5.3fMHz, %5.3fsec, %dsamples)\n", 1e-6*InpBuffer->Freq, InpBuffer->Time, InpBuffer->Full/2);
SlidingFFT(Spectra, *InpBuffer, FFT, Window); // perform sliding-FFT on the data
SpectraPower(Power, Spectra); // calculate power of the spectra
RF->GSM_OutQueue.Recycle(InpBuffer); // return the buffer to the queue for reuse
if(SpectrogramQueue.Size()) // of spectrogram was requested
{ LogImage(Image, Power, (Float)0.33, (Float)32.0, (Float)32.0); // create spectrogram image
JpegImage.Compress_MONO8(Image.Data, Image.Len, Image.Samples() ); }
while(SpectrogramQueue.Size()) // send the image to all requesters
{ Socket *Client; SpectrogramQueue.Pop(Client);
Client->Send("HTTP/1.1 200 OK\r\nCache-Control: no-cache\r\nContent-Type: image/jpeg\r\nRefresh: 10\r\n\r\n");
// printf("GSM_FFT.Exec() ... Request for (GSM)spectrogram\n");
Client->Send(JpegImage.Data, JpegImage.Size);
Client->SendShutdown(); Client->Close(); delete Client; }
Process(); // process the data to find frequency calibration markers
ExecTime=getCPU()-ExecTime; // printf("GSM_FFT.Exec() ... %5.3fsec\n", ExecTime);
}
// printf("GSM_FFT.Exec() ... Stop\n");
return 0; }
static const int ChanWidth = 200000; // [Hz] GSM channel width
static const int DataRate = 270833; // [Hz] GSM data rate
SampleBuffer<Float> Aver, Peak, PeakPos, Bkg;
void Process(void)
{ Float BinWidth=Power.Rate/2; // [Hz] FFT bin spectral width
int Bins = Power.Len; // [int] number of FFT bins
Float FirstBinFreq = Power.Freq-BinWidth*Bins/2; // [Hz] center frequency of the first FFT bin
Float LastBinFreq = Power.Freq+BinWidth*Bins/2; // [Hz] center frequency of the one-after-the-last FFT bin
int Chan = (int)ceil(FirstBinFreq/ChanWidth); // integer channel number corr. to the first FFT bin (GSM channels are on multiples of 200kHz)
for( ; ; Chan++) // loop over (possible) channels in this scan
{ Float CenterFreq=Chan*ChanWidth; if(CenterFreq>=LastBinFreq) break; // center frequency of the channel
Float LowFreq = CenterFreq-0.45*ChanWidth; // [Hz] lower frequency to measure the channel
Float UppFreq = CenterFreq+0.45*ChanWidth; // [Hz] upper frequency to measure the channel
int LowBin=(int)floor((LowFreq-FirstBinFreq)/BinWidth+0.5); // FFT bins corresponding to the channel frequency range
int UppBin=(int)floor((UppFreq-FirstBinFreq)/BinWidth+0.5);
if( (LowBin<0) || (LowBin>=Bins) ) continue; // skip this channel if range to measure
if( (UppBin<0) || (UppBin>=Bins) ) continue; // not contained completely in this scan
Float AverPower;
int Marks=ProcessChan(AverPower, LowBin, UppBin, (CenterFreq-FirstBinFreq)/BinWidth, BinWidth, CenterFreq);
if(Marks==1) PPM_Values.pop_back(); // if only one mark found, drop it - likely a false signal
printf("GSM_FFT::Process: Chan=%d, Freq=%8.3fMHz [%4d-%4d] %+6.1fdB %d marks\n", Chan, 1e-6*CenterFreq, LowBin, UppBin, 10*log10(AverPower), Marks);
// { char FileName[32]; sprintf(FileName, "GSM_%5.1fMHz.dat", 1e-6*CenterFreq);
// FILE *File=fopen(FileName, "wt");
// for(int Idx=0; Idx<Aver.Full; Idx++)
// { fprintf(File, "%5d %12.6f %12.6f %+10.6f %10.6f\n",
// Idx, Aver[Idx], Peak[Idx], PeakPos[Idx], Bkg[Idx]); }
// fclose(File); }
}
std::sort(PPM_Values.begin(), PPM_Values.end());
if(PPM_Values.size()>=16) // if at least 16 measured points
{ Float Aver, RMS; int Margin=PPM_Values.size()/4;
AverRMS(Aver, RMS, PPM_Values.data()+Margin, PPM_Values.size()-2*Margin);
// printf("PPM = %+7.3f (%5.3f) [%d]\n", Aver, RMS, PPM_Values.size()-2*Margin);
if(RMS<0.5)
{ PPM_Aver=Aver; PPM_RMS=RMS; PPM_Points=PPM_Values.size()-2*Margin; PPM_Time=(time_t)floor(Power.Time+0.5); PPM_Values.clear();
printf("GSM freq. calib. = %+7.3f +/- %5.3f ppm, %d points\n", PPM_Aver, PPM_RMS, PPM_Points);
Float Corr=RF->GSM_FreqCorr; Corr+=0.25*(PPM_Aver-Corr); RF->GSM_FreqCorr=Corr; }
PPM_Values.clear();
}
if(PPM_Values.size()>=8) // if at least 8 measured points
{ Float Aver, RMS;
AverRMS(Aver, RMS, PPM_Values.data()+1, PPM_Values.size()-2); // calc. the average excluding two extreme points
// printf("PPM = %+7.3f (%5.3f) [%d]\n", Aver, RMS, PPM_Values.size()-2);
if(RMS<0.5)
{ PPM_Aver=Aver; PPM_RMS=RMS; PPM_Points=PPM_Values.size()-2; PPM_Time=(time_t)floor(Power.Time+0.5); PPM_Values.clear();
printf("GSM freq. calib. = %+7.3f +/- %5.3f ppm, %d points\n", PPM_Aver, PPM_RMS, PPM_Points);
Float Corr=RF->GSM_FreqCorr; Corr+=0.25*(PPM_Aver-Corr); RF->GSM_FreqCorr=Corr; }
}
}
// Average, Peak (with Position) and Background = Average - values around the Peak
static void AverPeakBkg(Float &Aver, Float &Peak, Float &PeakPos, Float &Bkg, Float *Data, int Size)
{ Aver=0; Peak=0; PeakPos=0; int PeakIdx=0;
for(int Idx=0; Idx<Size; Idx++)
{ Float Dat=Data[Idx];
if(Dat>Peak) { Peak=Dat; PeakIdx=Idx; }
Aver+=Dat; }
if(PeakIdx==0) { Peak+=Data[ 1]; PeakPos=PeakIdx+Data[ 1]/Peak; Bkg=(Aver-Peak)/(Size-2); }
else if(PeakPos==(Size-1)) { Peak+=Data[Size-2]; PeakPos=PeakIdx-Data[Size-2]/Peak; Bkg=(Aver-Peak)/(Size-2); }
else { Peak+=Data[PeakIdx+1]+Data[PeakIdx-1]; PeakPos=PeakIdx+(Data[PeakIdx+1]-Data[PeakIdx-1])/Peak; Bkg=(Aver-Peak)/(Size-3); }
Aver/=Size; }
// average and RMS of a data series
static void AverRMS(Float &Aver, Float &RMS, Float *Data, int Size)
{ Aver=0; RMS=0;
for(int Idx=0; Idx<Size; Idx++)
{ Aver+=Data[Idx]; }
Aver/=Size;
for(int Idx=0; Idx<Size; Idx++)
{ Float Diff=Data[Idx]-Aver; RMS+=Diff*Diff; }
RMS=sqrt(RMS/Size); }
int ProcessChan(Float &AverPower, int LowBin, int UppBin, Float CenterBin, Float BinWidth, Float CenterFreq) // process a single GSM channel
{ int Slides = Power.Samples(); // [FFT slides] in the data
int Bins = Power.Len; // number of FFT bins
Aver.Allocate(1, Slides); Peak.Allocate(1, Slides); PeakPos.Allocate(1, Slides); Bkg.Allocate(1, Slides);
Float *Data = Power.Data;
for(int Idx=0; Idx<Slides; Idx++, Data+=Bins)
{ AverPeakBkg(Aver[Idx], Peak[Idx], PeakPos[Idx], Bkg[Idx], Data+LowBin, UppBin-LowBin+1);
PeakPos[Idx]+=LowBin-CenterBin; }
Aver.Full=Slides; Peak.Full=Slides; PeakPos.Full=Slides; Bkg.Full=Slides;
Float PowerRMS; AverRMS(AverPower, PowerRMS, Aver.Data, Slides);
// printf("AverPower=%3.1f, PowerRMS=%3.1f\n", AverPower, PowerRMS);
if(PowerRMS>(0.5*AverPower)) return 0; // skip pulsing channels
Float AverPeak, PeakRMS; AverRMS(AverPeak, PeakRMS, Peak.Data, Slides);
Float AverBkg, BkgRMS; AverRMS(AverBkg, BkgRMS, Bkg.Data, Slides);
// printf("AverPeak=%3.1f, PeakRMS=%3.1f, AverBkg=%5.3f, BkgRMS=%5.3f\n", AverPeak, PeakRMS, AverBkg, BkgRMS);
int Marks=0;
Float PeakThres = 4*PeakRMS;
Float BkgThres = 4*BkgRMS;
for(int Idx=1; Idx<(Slides-1); Idx++)
{ Float PeakL=Peak.Data[Idx-1]-AverPeak;
Float PeakM=Peak.Data[Idx ]-AverPeak;
Float PeakR=Peak.Data[Idx+1]-AverPeak;
Float PeakSum = PeakL+PeakM+PeakR;
if(PeakSum<=PeakThres) continue;
if(PeakM<PeakL) continue;
if(PeakM<=PeakR) continue;
if(PeakM<=((PeakL+PeakR)/2)) continue;
Float BkgSum = Bkg.Data[Idx-1]+Bkg.Data[Idx]+Bkg.Data[Idx+1];
if((3*AverBkg-BkgSum)<BkgThres) continue;
if(Peak.Data[Idx]<(40*Bkg.Data[Idx])) continue;
Float PPM = -1e6*(PeakPos.Data[Idx]*BinWidth-(Float)DataRate/4)/CenterFreq;
// printf("Mark: PeakSum[%5d]=%8.1f/%6.1f Bkg=%8.3f/%6.3f Peak/Bkg=%8.1f PeakPos=%+7.3f %+7.3fppm\n",
// Idx, PeakSum, PeakThres, 3*AverBkg-BkgSum, BkgThres, Peak.Data[Idx]/Bkg.Data[Idx], PeakPos.Data[Idx], PPM);
PPM_Values.push_back(PPM);
Marks++; }
return Marks; }
} ;
// ==================================================================================================
template <class Float>
class HTTP_Server
{ public:
int Port; // listenning port
Thread Thr; // processing thread
RF_Acq *RF; // pointer to RF acquisition
GSM_FFT<Float> *GSM;
char Host[32]; // Host name
char ConfigFileName[PATH_MAX];
public:
HTTP_Server(RF_Acq *RF, GSM_FFT<Float> *GSM)
{ this->RF=RF; this->GSM=GSM;
Host[0]=0; SocketAddress::getHostName(Host, 32);
Config_Defaults(); }
void Config_Defaults(void)
{ ConfigFileName[0]=0;
Port=8080; }
int Config(config_t *Config)
{ config_lookup_int(Config, "HTTP.Port", &Port); return 0; }
void Start(void)
{ if(Port<=0) return;
Thr.setExec(ThreadExec); Thr.Create(this); }
~HTTP_Server()
{ if(Port) Thr.Cancel(); }
static void *ThreadExec(void *Context)
{ HTTP_Server *This = (HTTP_Server *)Context; return This->Exec(); }
void *Exec(void)
{ printf("HTTP_Server.Exec() ... Start\n");
while(1)
{ Socket Listen;
// if(Listen.Create_STREAM()<0) { printf("HTTP_Server.Exec() ... Cannot Create_STREAM()\n"); sleep(1); continue; }
// if(Listen.setReuseAddress()<0) { printf("HTTP_Server.Exec() ... Cannot setReuseAddress()\n"); sleep(1); continue; }
if(Listen.Listen(Port)<0) { printf("HTTP_Server.Exec() ... Cannot listen() on port %d\n", Port); sleep(1); continue; }
printf("HTTP_Server.Exec() ... Listening on port %d\n", Port);
while(1)
{ Socket *Client = new Socket; SocketAddress ClientAddress;
if(Listen.Accept(*Client, ClientAddress)<0) { printf("HTTP_Server.Exec() ... Cannot accept()\n"); sleep(1); break; }
printf("HTTP_Server.Exec() ... Client from %s\n", ClientAddress.getIPColonPort());
Client->setReceiveTimeout(2.0); Client->setSendTimeout(20.0); Client->setLinger(1, 5);
SocketBuffer Request; time_t ConnectTime; time(&ConnectTime);
while(1)
{ if(Client->Receive(Request)<0) { printf("HTTP_Server.Exec() ... Cannot receive()\n"); Client->SendShutdown(); Client->Close(); delete Client; Client=0; break; }
if( Request.Len && strstr(Request.Data, "\r\n\r\n") ) break;
time_t Now; time(&Now);
if((Now-ConnectTime)>2) { printf("HTTP_Server.Exec() ... Request timeout\n"); Client->SendShutdown(); Client->Close(); delete Client; Client=0; break; }
}
if(Client)
{ // printf("HTTP_Server.Exec() ... Request[%d]:\n", Request.Len); Request.WriteToFile(stdout); fflush(stdout);
ProcessRequest(Client, Request); }
}
Listen.Close();
}
printf("HTTP_Server.Exec() ... Stop\n");
return 0; }
int CopyWord(char *Dst, char *Src, int MaxLen)
{ int Count=0; MaxLen-=1;
for( ; ; )
{ char ch = (*Src++); if(ch<=' ') break;
if(Count>=MaxLen) return -1;
(*Dst++) = ch; Count++; }
(*Dst++)=0;
return Count; }
void ProcessRequest(Socket *Client, SocketBuffer &Request)
{ if(memcmp(Request.Data, "GET ", 4)!=0) goto BadRequest;
char File[64]; if(CopyWord(File, Request.Data+4, 64)<0) goto BadRequest;
printf("HTTP_Server.Exec() ... Request for %s\n", File);
if(strcmp(File, "/")==0)
{ Status(Client); return; }
else if( (strcmp(File, "/status.html")==0) || (strcmp(File, "status.html")==0) )
{ Status(Client); return; }
else if( (strcmp(File, "/gsm-spectrogram.jpg")==0) || (strcmp(File, "gsm-spectrogram.jpg")==0) )
{ GSM->SpectrogramQueue.Push(Client); return; }
else if( (strcmp(File, "/spectrogram.jpg")==0) || (strcmp(File, "spectrogram.jpg")==0) )
{ RF->SpectrogramQueue.Push(Client); return; }
else if( (strcmp(File, "/time-slot-rf.u8")==0) || (strcmp(File, "time-slot-rf.u8")==0) )
{ RF->RawDataQueue.Push(Client); return; }
// NotFound:
Client->Send("HTTP/1.0 404 Not Found\r\n\r\n"); Client->SendShutdown(); Client->Close(); delete Client; return;
BadRequest:
Client->Send("HTTP/1.0 400 Bad Request\r\n\r\n"); Client->SendShutdown(); Client->Close(); delete Client; return;
}
void Status(Socket *Client)
{ Client->Send("\
HTTP/1.1 200 OK\r\n\
Cache-Control: no-cache\r\n\
Content-Type: text/html\r\n\
Refresh: 5\r\n\
\r\n\
<!DOCTYPE html>\r\n\
<html>\r\n\
");
// time_t Now; time(&Now);
dprintf(Client->SocketFile, "\
<title>%s RTLSDR-OGN RF processor " STR(VERSION) " status</title>\n\
<b>RTLSDR OGN RF processor " STR(VERSION) "/"__DATE__"</b><br /><br />\n\n", Host);
dprintf(Client->SocketFile, "<table>\n<tr><th>System</th><th></th></tr>\n");
dprintf(Client->SocketFile, "<tr><td>Host name</td><td align=right><b>%s</b></td></tr>\n", Host);
dprintf(Client->SocketFile, "<tr><td>Configuration file path+name</td><td align=right><b>%s</b></td></tr>\n", ConfigFileName);
time_t Now; time(&Now);
struct tm TM; localtime_r(&Now, &TM);
dprintf(Client->SocketFile, "<tr><td>Local time</td><td align=right><b>%02d:%02d:%02d</b></td></tr>\n", TM.tm_hour, TM.tm_min, TM.tm_sec);
dprintf(Client->SocketFile, "<tr><td>Software</td><td align=right><b>" STR(VERSION) "</b></td></tr>\n");
#ifndef __MACH__
struct sysinfo SysInfo;
if(sysinfo(&SysInfo)>=0)
{ dprintf(Client->SocketFile, "<tr><td>CPU load</td><td align=right><b>%3.1f/%3.1f/%3.1f</b></td></tr>\n",
SysInfo.loads[0]/65536.0, SysInfo.loads[1]/65536.0, SysInfo.loads[2]/65536.0);
dprintf(Client->SocketFile, "<tr><td>RAM [free/total]</td><td align=right><b>%3.1f/%3.1f MB</b></td></tr>\n",
1e-6*SysInfo.freeram*SysInfo.mem_unit, 1e-6*SysInfo.totalram*SysInfo.mem_unit);
}
#endif
float CPU_Temperature;
if(getCpuTemperature(CPU_Temperature)>=0)
dprintf(Client->SocketFile, "<tr><td>CPU temperature</td><td align=right><b>%+5.1f ℃</b></td></tr>\n", CPU_Temperature);
float SupplyVoltage=0;
if(getSupplyVoltage(SupplyVoltage)>=0)
dprintf(Client->SocketFile, "<tr><td>Supply voltage</td><td align=right><b>%5.3f V</b></td></tr>\n", SupplyVoltage);
float SupplyCurrent=0;
if(getSupplyCurrent(SupplyCurrent)>=0)
dprintf(Client->SocketFile, "<tr><td>Supply current</td><td align=right><b>%5.3f A</b></td></tr>\n", SupplyCurrent);
double NtpTime, EstError, RefFreqCorr;
if(getNTP(NtpTime, EstError, RefFreqCorr)>=0)
{ time_t Time = floor(NtpTime);
struct tm TM; gmtime_r(&Time, &TM);
dprintf(Client->SocketFile, "<tr><td>NTP UTC time</td><td align=right><b>%02d:%02d:%02d</b></td></tr>\n", TM.tm_hour, TM.tm_min, TM.tm_sec);
dprintf(Client->SocketFile, "<tr><td>NTP est. error</td><td align=right><b>%3.1f ms</b></td></tr>\n", 1e3*EstError);
dprintf(Client->SocketFile, "<tr><td>NTP freq. corr.</td><td align=right><b>%+5.2f ppm</b></td></tr>\n", RefFreqCorr);
}
if(RF->SDR.isOpen())
{ dprintf(Client->SocketFile, "<tr><th>RTL-SDR device #%d</th><th></th></tr>\n", RF->SDR.DeviceIndex);
dprintf(Client->SocketFile, "<tr><td>Name</td><td align=right><b>%s</b></td></tr>\n", RF->SDR.getDeviceName());
dprintf(Client->SocketFile, "<tr><td>Tuner type</td><td align=right><b>%s</b></td></tr>\n", RF->SDR.getTunerTypeName());
char Manuf[256], Product[256], Serial[256];
RF->SDR.getUsbStrings(Manuf, Product, Serial);
dprintf(Client->SocketFile, "<tr><td>Manufacturer</td><td align=right><b>%s</b></td></tr>\n", Manuf);
dprintf(Client->SocketFile, "<tr><td>Product</td><td align=right><b>%s</b></td></tr>\n", Product);
dprintf(Client->SocketFile, "<tr><td>Serial</td><td align=right><b>%s</b></td></tr>\n", Serial);
#ifdef NEW_RTLSDR_LIB
for(int Stage=0; Stage<8; Stage++)
{ char Descr[256]; int Gains=RF->SDR.getTunerStageGains(Stage, 0, Descr); if(Gains<=0) break;
dprintf(Client->SocketFile, "<tr><td>Tuner stage #%d</td><td align=right><b>%s [%2d]</b></td></tr>\n", Stage, Descr, Gains);
}
dprintf(Client->SocketFile, "<tr><td>Tuner bandwidths</td><td align=right><b>[%d]</b></td></tr>\n", RF->SDR.getTunerBandwidths());
dprintf(Client->SocketFile, "<tr><td>Tuner gains</td><td align=right><b>[%d]</b></td></tr>\n", RF->SDR.getTunerGains());
#endif
dprintf(Client->SocketFile, "<tr><td>Center frequency</td><td align=right><b>%7.3f MHz</b></td></tr>\n", 1e-6*RF->SDR.getCenterFreq());
dprintf(Client->SocketFile, "<tr><td>Sample rate</td><td align=right><b>%5.3f MHz</b></td></tr>\n", 1e-6*RF->SDR.getSampleRate());
dprintf(Client->SocketFile, "<tr><td>Frequency correction</td><td align=right><b>%+5.1f ppm</b></td></tr>\n", RF->FreqCorr + RF->GSM_FreqCorr);
dprintf(Client->SocketFile, "<tr><td>Live Time</td><td align=right><b>%5.1f%%</b></td></tr>\n", 100*RF->getLifeTime());
uint32_t RtlFreq, TunerFreq; RF->SDR.getXtalFreq(RtlFreq, TunerFreq);
dprintf(Client->SocketFile, "<tr><td>RTL Xtal</td><td align=right><b>%8.6f MHz</b></td></tr>\n", 1e-6*RtlFreq);
dprintf(Client->SocketFile, "<tr><td>Tuner Xtal</td><td align=right><b>%8.6f MHz</b></td></tr>\n", 1e-6*TunerFreq);
/*
dprintf(Client->SocketFile, "<tr><td>Gain[%d]</td><td align=right><b>", RF->SDR.Gains);
for(int Idx=0; Idx<RF->SDR.Gains; Idx++)
{ dprintf(Client->SocketFile, "%c%3.1f", Idx?',':' ', 0.1*RF->SDR.Gain[Idx]);
}
dprintf(Client->SocketFile, " [dB]</b></td></tr>\n");
*/
}
dprintf(Client->SocketFile, "<tr><th>RF</th><th></th></tr>\n");
dprintf(Client->SocketFile, "<tr><td>RF.FreqPlan</td><td align=right><b>%d: %s</b></td></tr>\n", RF->HoppingPlan.Plan, RF->HoppingPlan.getPlanName() );
dprintf(Client->SocketFile, "<tr><td>RF.Device</td><td align=right><b>%d</b></td></tr>\n", RF->DeviceIndex);
if(RF->DeviceSerial[0])
dprintf(Client->SocketFile, "<tr><td>RF.DeviceSerial</td><td align=right><b>%s</b></td></tr>\n", RF->DeviceSerial);
dprintf(Client->SocketFile, "<tr><td>RF.SampleRate</td><td align=right><b>%3.1f MHz</b></td></tr>\n", 1e-6*RF->SampleRate);
// dprintf(Client->SocketFile, "<tr><td>RF.PipeName</td><td align=right><b>%s</b></td></tr>\n", ??->OutPipeName );
dprintf(Client->SocketFile, "<tr><td>RF.FreqCorr</td><td align=right><b>%+3d ppm</b></td></tr>\n", RF->FreqCorr);
if(RF->FreqRaster)
dprintf(Client->SocketFile, "<tr><td>RF.FreqRaster</td><td align=right><b>%3d Hz</b></td></tr>\n", RF->FreqRaster);
if(RF->BiasTee>=0)