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/* -*- c++ -*- */
/*
 * Copyright 2012 Dimitri Stolnikov <horiz0n@gmx.net>
 *
 * GNU Radio 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, or (at your option)
 * any later version.
 *
 * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef OSMOSDR_SRC_IFACE_H
#define OSMOSDR_SRC_IFACE_H

#include <osmosdr/osmosdr_ranges.h>
#include <gr_basic_block.h>

class osmosdr_src_iface;

typedef boost::shared_ptr<osmosdr_src_iface> osmosdr_src_iface_sptr;

/*!
 * TODO: document
 *
 */
class osmosdr_src_iface
{
public:
  /*!
   * Get the number of channels the underlying radio hardware offers.
   * \return the number of available channels
   */
  virtual size_t get_num_channels( void ) = 0;

  /*!
   * Get the possible sample rates for the underlying radio hardware.
   * \return a range of rates in Sps
   */
  virtual osmosdr::meta_range_t get_sample_rates( void ) = 0;

  /*!
   * Set the sample rate for the underlying radio hardware.
   * This also will select the appropriate IF bandpass, if applicable.
   * \param rate a new rate in Sps
   */
  virtual double set_sample_rate( double rate ) = 0;

  /*!
   * Get the sample rate for the underlying radio hardware.
   * This is the actual sample rate and may differ from the rate set.
   * \return the actual rate in Sps
   */
  virtual double get_sample_rate( void ) = 0;

  /*!
   * Get the tunable frequency range for the underlying radio hardware.
   * \param chan the channel index 0 to N-1
   * \return the frequency range in Hz
   */
  virtual osmosdr::freq_range_t get_freq_range( size_t chan = 0 ) = 0;

  /*!
   * Tune the underlying radio hardware to the desired center frequency.
   * This also will select the appropriate RF bandpass.
   * \param freq the desired frequency in Hz
   * \param chan the channel index 0 to N-1
   * \return the actual frequency in Hz
   */
  virtual double set_center_freq( double freq, size_t chan = 0 ) = 0;

  /*!
   * Get the center frequency the underlying radio hardware is tuned to.
   * This is the actual frequency and may differ from the frequency set.
   * \param chan the channel index 0 to N-1
   * \return the frequency in Hz
   */
  virtual double get_center_freq( size_t chan = 0 ) = 0;

  /*!
   * Set the frequency correction value in parts per million.
   * \param ppm the desired correction value in parts per million
   * \param chan the channel index 0 to N-1
   * \return correction value in parts per million
   */
  virtual double set_freq_corr( double ppm, size_t chan = 0 ) = 0;

  /*!
   * Get the frequency correction value.
   * \param chan the channel index 0 to N-1
   * \return correction value in parts per million
   */
  virtual double get_freq_corr( size_t chan = 0 ) = 0;

  /*!
   * Get the gain stage names of the underlying radio hardware.
   * \param chan the channel index 0 to N-1
   * \return a vector of strings containing the names of gain stages
   */
  virtual std::vector<std::string> get_gain_names( size_t chan = 0 ) = 0;

  /*!
   * Get the settable overall gain range for the underlying radio hardware.
   * \param chan the channel index 0 to N-1
   * \return the gain range in dB
   */
  virtual osmosdr::gain_range_t get_gain_range( size_t chan = 0 ) = 0;

  /*!
   * Get the settable gain range for a specific gain stage.
   * \param name the name of the gain stage
   * \param chan the channel index 0 to N-1
   * \return the gain range in dB
   */
  virtual osmosdr::gain_range_t get_gain_range( const std::string & name,
                                                size_t chan = 0 ) = 0;

  /*!
   * Set the gain mode for the underlying radio hardware.
   * This might be supported only for certain hardware types.
   * \param automatic the gain mode (true means automatic gain mode)
   * \param chan the channel index 0 to N-1
   * \return the actual gain mode
   */
  virtual bool set_gain_mode( bool automatic, size_t chan = 0 ) { return false; }

  /*!
   * Get the gain mode selected for the underlying radio hardware.
   * \param chan the channel index 0 to N-1
   * \return the actual gain mode (true means automatic gain mode)
   */
  virtual bool get_gain_mode( size_t chan = 0 ) { return false; }

  /*!
   * Set the gain for the underlying radio hardware.
   * This function will automatically distribute the desired gain value over
   * available gain stages in an appropriate way and return the actual value.
   * \param gain the gain in dB
   * \param chan the channel index 0 to N-1
   * \return the actual gain in dB
   */
  virtual double set_gain( double gain, size_t chan = 0 ) = 0;

  /*!
   * Set the named gain on the underlying radio hardware.
   * \param gain the gain in dB
   * \param name the name of the gain stage
   * \param chan the channel index 0 to N-1
   * \return the actual gain in dB
   */
  virtual double set_gain( double gain,
                           const std::string & name,
                           size_t chan = 0 ) = 0;

  /*!
   * Get the actual gain setting of the underlying radio hardware.
   * \param chan the channel index 0 to N-1
   * \return the actual gain in dB
   */
  virtual double get_gain( size_t chan = 0 ) = 0;

  /*!
   * Get the actual gain setting of a named stage.
   * \param name the name of the gain stage
   * \param chan the channel index 0 to N-1
   * \return the actual gain in dB
   */
  virtual double get_gain( const std::string & name, size_t chan = 0 ) = 0;

  /*!
   * Set the IF gain for the underlying radio hardware.
   * This function will automatically distribute the desired gain value over
   * available IF gain stages in an appropriate way and return the actual value.
   * \param gain the gain in dB
   * \param chan the channel index 0 to N-1
   * \return the actual gain in dB
   */
  virtual double set_if_gain( double gain, size_t chan = 0 ) { return 0; }

  /*!
   * Set the BB gain for the underlying radio hardware.
   * This function will automatically distribute the desired gain value over
   * available BB gain stages in an appropriate way and return the actual value.
   * \param gain the gain in dB
   * \param chan the channel index 0 to N-1
   * \return the actual gain in dB
   */
  virtual double set_bb_gain( double gain, size_t chan = 0 ) { return 0; }

  /*!
   * Get the available antennas of the underlying radio hardware.
   * \param chan the channel index 0 to N-1
   * \return a vector of strings containing the names of available antennas
   */
  virtual std::vector< std::string > get_antennas( size_t chan = 0 ) = 0;

  /*!
   * Select the active antenna of the underlying radio hardware.
   * \param chan the channel index 0 to N-1
   * \return the actual antenna's name
   */
  virtual std::string set_antenna( const std::string & antenna,
                                   size_t chan = 0 ) = 0;

  /*!
   * Get the actual underlying radio hardware antenna setting.
   * \param chan the channel index 0 to N-1
   * \return the actual antenna's name
   */
  virtual std::string get_antenna( size_t chan = 0 ) = 0;

  /*!
   * Set the RX frontend DC correction mode.
   * The automatic correction subtracts out the long-run average.
   *
   * When disabled, the averaging option operation is reset.
   * Once in Manual mode, the average value will be held constant until
   * the user re-enables the automatic correction or overrides the
   * value by manually setting the offset.
   *
   * \param mode dc offset correction mode: 0 = Off, 1 = Manual, 2 = Automatic
   * \param chan the channel index 0 to N-1
   */
  virtual void set_dc_offset_mode( int mode, size_t chan = 0 ) { }

  /*!
   * Set a constant DC offset value.
   * The value is complex to control both I and Q.
   * Only set this when automatic correction is disabled.
   *
   * \param offset the dc offset (1.0 is full-scale)
   * \param chan the channel index 0 to N-1
   */
  virtual void set_dc_offset( const std::complex<double> &offset, size_t chan = 0 ) { }

  /*!
   * Set the RX frontend IQ balance mode.
   *
   * \param mode iq balance correction mode: 0 = Off, 1 = Manual, 2 = Automatic
   * \param chan the channel index 0 to N-1
   */
  virtual void set_iq_balance_mode( int mode, size_t chan = 0 ) { }

  /*!
   * Set the RX frontend IQ balance correction.
   * Use this to adjust the magnitude and phase of I and Q.
   *
   * \param balance the complex correction value
   * \param chan the channel index 0 to N-1
   */
  virtual void set_iq_balance( const std::complex<double> &balance, size_t chan = 0 ) { }

  /*!
   * Set the bandpass filter on the radio frontend.
   * \param bandwidth the filter bandwidth in Hz
   * \param chan the channel index 0 to N-1
   * \return the actual filter bandwidth in Hz
   */
  virtual double set_bandwidth( double bandwidth, size_t chan = 0 ) { return 0; }

  /*!
   * Get the actual bandpass filter setting on the radio frontend.
   * \param chan the channel index 0 to N-1
   * \return the actual filter bandwidth in Hz
   */
  virtual double get_bandwidth( size_t chan = 0 ) { return 0; }

  /*!
   * Get the possible bandpass filter settings on the radio frontend.
   * \param chan the channel index 0 to N-1
   * \return a range of bandwidths in Hz
   */
  virtual osmosdr::freq_range_t get_bandwidth_range( size_t chan = 0 )
    { return osmosdr::freq_range_t(); }
};

#endif // OSMOSDR_SRC_IFACE_H