signal_generator.h

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#ifndef FASTCAT_SIGNAL_GENERATOR_H_
#define FASTCAT_SIGNAL_GENERATOR_H_
 
// Include related header (for cc files)
 
// Include c then c++ libraries
#include <random>
 
// Include external then project includes
#include "fastcat/device_base.h"
#include "fastcat/types.h"
 
namespace fastcat
{
enum SignalGeneratorType {
  SINE_WAVE,
  SAW_TOOTH,
  GAUSSIAN_RANDOM,
  UNIFORM_RANDOM,
  BAD_SIGNAL_GENERATOR_TYPE
};
 
SignalGeneratorType SignalGeneratorTypeFromString(const std::string&);
 
typedef struct {
  double angular_frequency;
  double phase;
  double amplitude;
  double offset;
} SineWaveParams;
 
typedef struct {
  double slope;
  double max;
  double min;
  double range;  // derived
  double modulo;
} SawToothParams;
 
typedef struct {
  uint32_t                         seed = 1;
  double                           mean;
  double                           sigma;
  std::normal_distribution<double> distribution;
} GaussianRandomParams;
 
typedef struct {
  uint32_t                               seed = 1;
  double                                 min;
  double                                 max;
  std::uniform_real_distribution<double> distribution;
} UniformRandomParams;
 
class SignalGenerator : public DeviceBase
{
 public:
  SignalGenerator();
  bool ConfigFromYaml(const YAML::Node& node) override;
  bool Read() override;
 
 protected:
  std::string                signal_generator_type_string_;
  enum SignalGeneratorType   signal_generator_type_;
  double                     start_time_ = 0;
  std::default_random_engine generator_;
 
  union {
    SineWaveParams       sine_wave_;
    SawToothParams       saw_tooth_;
    GaussianRandomParams gaussian_random_;
    UniformRandomParams  uniform_random_;
  };
};
 
}  // namespace fastcat
 
#endif