lasp/cpp_src/dsp/lasp_rtsignalviewer.h

// lasp_threadedaps.h
//
// Author: J.A. de Jong - ASCEE
//
// Description: Real Time Signal Viewer.
#pragma once
#include "lasp_mathtypes.h"
#include "lasp_threadedindatahandler.h"
#include "lasp_timebuffer.h"
#include <mutex>

/**
 * \addtogroup dsp
 * @{
 *
 * \addtogroup rt
 * @{
 */

/**
 * @brief Real time signal viewer. Shows envelope of the signal based on amount
 * of history shown.
 */
class RtSignalViewer : public ThreadedInDataHandler<RtSignalViewer> {

  /**
   * @brief Storage for sensitivity values
   */
  vd _sens;

  /**
   * @brief Storage for time samples
   */
  TimeBuffer _tb;

  /**
   * @brief The amount of time history to show
   */
  const d _approx_time_hist;
  /**
   * @brief The number of points to show
   */
  const us _resolution;

  /**
   * @brief The channel to show
   */
  const us _channel;

  us _nsamples_per_point;
  d _fs;

  dmat _dat;

  /**
   * @brief Mutex only for _signalviewer.
   */
  mutable std::mutex _sv_mtx;

public:
  /**
   * @brief
   *
   * @param mgr Stream manager
   * @param approx_time_hist The *approximate* time history to show. The exact
   * time history will be calculated such that there fits an integer number of
   * samples in a single 'point'.
   * @param resolution Number of time points
   * @param channel The channel number
   */
  RtSignalViewer(SmgrHandle mgr, const d approx_time_hist, const us resolution,
                 const us channel);

  ~RtSignalViewer();

  /**
   * @brief Returns a 2D array, with:
   * - first column: time instances.
   * - second column: minimum value of signal
   * - third column: maximum value of signal
   *
   */
  dmat getCurrentValue() const;

  void inCallback(const DaqData &);
  void reset(const Daq *);
};

/** @} */
/** @} */