USRPRX.hxx

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#pragma once
/*
Copyright (c) 2012, Matthew H. Reilly (kb1vc)
All rights reserved.
 
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
 
    Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
    Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in
    the documentation and/or other materials provided with the
    distribution.
 
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
 
#include "RadioRX.hxx"
#include "SoDaBase.hxx"
#include "SoDaThread.hxx"
 
#include "Command.hxx"
#include "Params.hxx"
#include "UI.hxx"
#include "QuadratureOscillator.hxx"
#include <SoDa/ReSampler.hxx>
#include <vector>
#include <complex>
#include <uhd/usrp/multi_usrp.hpp>
#include <uhd/stream.hpp>
 
#include <SoDa/MailBox.hxx>
 
#include <memory>
 
namespace SoDa {
  class USRPRX;
  typedef std::shared_ptr<USRPRX> USRPRXPtr;
  
  class USRPRX : public SoDa::RadioRX {
  protected:
    USRPRX(ParamsPtr params, uhd::usrp::multi_usrp::sptr usrp);
  public:
    static USRPRXPtr make(ParamsPtr params, uhd::usrp::multi_usrp::sptr _usrp) {
      auto ret = std::shared_ptr<USRPRX>(new USRPRX(params, _usrp));
      ret->self = ret;
      ret->registerThread(ret);
      return ret;
    }

    void setNCOFreq(double freq);

    bool downConvert();

    void startStream();

    void stopStream();

    void closeStream();

    bool streamEnabled();
    
    void enableIFStreamer(bool enable);
 
  private:   
    void doMixer(SoDa::CBufPtr inout);
 
    void actualStartStream(); 
 
    // state for the USRP widget
    uhd::rx_streamer::sptr rx_bits;
    uhd::usrp::multi_usrp::sptr usrp; 
 
    unsigned int rx_buffer_size;
 
    // are we collecting?
    bool audio_rx_stream_enabled;
 
    SoDa::Command::ModulationType rx_modulation;
    
    // pointer to user interface box -- we send it FFT snapshots
    UI * ui;
 
    // IF tuner
    QuadratureOscillator IF_osc;
    double current_IF_tuning;
    double rx_sample_rate;
 
    // spectrum reporting
    bool enable_spectrum_report; 
    
    //debug hooks
    int outf[2];
    int scount;
 
    std::ofstream rf_dumpfile;
    std::ofstream if_dumpfile;
 
    std::weak_ptr<USRPRX> self;
 
    // Optional 4:1 downsampling — active when hw wire rate is 2.5 MS/s
    bool             needs_resample;
    SoDa::ReSamplerPtr hw_resampler;
    std::vector<std::complex<float>> hw_cf;    
    std::vector<std::complex<float>> rs_out;   
    std::vector<std::complex<float>> accu;     
    unsigned int     hw_buf_size;  
    unsigned int     rs_out_size;  
    unsigned int     rf_buf_size;  
  };
}