BaseBandTX.hxx

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/*
Copyright (c) 2012,2013,2014,2025 Matthew H. Reilly (kb1vc)
All rights reserved.
 
  FM modulator features based on code contributed by and 
  Copyright (c) 2014, Aaron Yankey Antwi (aaronyan2001@gmail.com)
 
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.
*/
#pragma once
 
#include "SoDaBase.hxx"
#include "SoDaThread.hxx"
#include "Params.hxx"
#include "Command.hxx"
#include "HilbertTransformer.hxx"
#include "AudioIfc.hxx"
 
#include <SoDa/MailBox.hxx>
#include <SoDa/ReSampler.hxx>
#include <SoDa/OSFilter.hxx>
 
namespace SoDa {
  class BaseBandRX;
 
  class BaseBandTX;
  typedef std::shared_ptr<BaseBandTX> BaseBandTXPtr;
  typedef std::weak_ptr<BaseBandTX> BaseBandTXWeakPtr;
  
  class BaseBandTX : public SoDa::Thread {
  protected:
    BaseBandTX(ParamsPtr params,
           AudioIfcPtr audio_ifc
           );
 
  public:
    static BaseBandTXPtr make(ParamsPtr params,
           AudioIfcPtr audio_ifc
                  ) {
      auto ret = std::shared_ptr<BaseBandTX>(new BaseBandTX(params, audio_ifc));
      ret->registerThread(ret);      
      return ret; 
    }
    
    void subscribeToMailBoxes(const std::vector<MailBoxBasePtr> & mailboxes);    
    

    void run();
  private:
    void execGetCommand(CommandPtr cmd); 
    void execSetCommand(CommandPtr cmd); 
    void execRepCommand(CommandPtr cmd); 

    SoDa::CBufPtr modulateAM(std::vector<float> & audio_buf, 
                bool is_usb, bool is_lsb); 

    SoDa::CBufPtr modulateFM(std::vector<float> & audio_buf, 
                double deviation);
    
    double fm_phase;
    double nbfm_deviation; 
    double wbfm_deviation; 
    double fm_mic_gain; 
 
    
    CDatMBoxPtr tx_stream; 
    CmdMBoxPtr cmd_stream; 
    CmdMBox::Subscription cmd_subs; 
    
    // The interpolator
    SoDa::ReSamplerPtr interpolator;  
 
    // parameters
    unsigned int audio_buffer_size; 
    double audio_sample_rate; 
    unsigned int tx_buffer_size;  
 
    SoDa::Command::ModulationType tx_mode; 
    bool cw_tx_mode; 
    bool tx_on; 
    
 
    float af_gain; 
 
    // audio server state
    AudioIfcPtr audio_ifc; 
 
    bool tx_stream_on; 
 
    // we need some intermediate storage for things like
    // the IQ buffer
    std::vector<std::complex<float>> audio_IQ_buf; 

    std::vector<float> noise_buffer; 

    bool tx_noise_source_ena; 

    bool tx_audio_filter_ena; 
    
    SoDa::OSFilterPtr tx_audio_filter;

    SoDa::HilbertTransformerPtr hilbert;

    float mic_gain;
 
    bool debug_mode; 
    int debug_ctr; 
  }; 
}