/**
 *
 * \section COPYRIGHT
 *
 * Copyright 2013-2015 Software Radio Systems Limited
 *
 * \section LICENSE
 *
 * This file is part of the srsLTE library.
 *
 * srsLTE is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * srsLTE 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 Affero General Public License for more details.
 *
 * A copy of the GNU Affero General Public License can be found in
 * the LICENSE file in the top-level directory of this distribution
 * and at http://www.gnu.org/licenses/.
 *
 */
  
#ifndef RF_H 
#define RF_H

#include <sys/time.h>
#include <stdbool.h>
#include <stdint.h>
#include <pthread.h>

#include "srslte/config.h"

typedef struct {
  void *handler;
  void *dev;
  
  // The following variables are for threaded RX gain control 
  pthread_t thread_gain; 
  pthread_cond_t  cond; 
  pthread_mutex_t mutex; 
  double cur_rx_gain; 
  double new_rx_gain;   
  bool   tx_gain_same_rx; 
  float  tx_rx_gain_offset; 
} srslte_rf_t;

typedef struct {
  float dc_gain;
  float dc_phase;
  float iq_i;
  float iq_q; 
} srslte_rf_cal_t; 

typedef struct {
  enum { 
    SRSLTE_RF_ERROR_LATE,
    SRSLTE_RF_ERROR_UNDERFLOW,
    SRSLTE_RF_ERROR_OVERFLOW,
    SRSLTE_RF_ERROR_OTHER
  } type;
  int opt;
  const char *msg; 
} srslte_rf_error_t;

typedef void (*srslte_rf_error_handler_t)(srslte_rf_error_t error);

SRSLTE_API int srslte_rf_open(srslte_rf_t *h, 
                       char *args);

SRSLTE_API int srslte_rf_open_multi(srslte_rf_t *h, 
                                    char *args, 
                                    uint32_t nof_rx_antennas);

SRSLTE_API int srslte_rf_open_devname(srslte_rf_t *h,
                                      char *devname, 
                                      char *args);

SRSLTE_API int srslte_rf_open_devname_multi(srslte_rf_t *h, 
                                            char *devname, 
                                            char *args, 
                                            uint32_t nof_rx_antennas);

SRSLTE_API const char *srslte_rf_name(srslte_rf_t *h); 

SRSLTE_API int srslte_rf_start_gain_thread(srslte_rf_t *rf, 
                                           bool tx_gain_same_rx); 

SRSLTE_API int srslte_rf_close(srslte_rf_t *h);

SRSLTE_API void srslte_rf_set_tx_cal(srslte_rf_t *h, srslte_rf_cal_t *cal);

SRSLTE_API void srslte_rf_set_rx_cal(srslte_rf_t *h, srslte_rf_cal_t *cal);

SRSLTE_API int srslte_rf_start_rx_stream(srslte_rf_t *h, bool now);

SRSLTE_API int srslte_rf_stop_rx_stream(srslte_rf_t *h);

SRSLTE_API void srslte_rf_flush_buffer(srslte_rf_t *h);

SRSLTE_API bool srslte_rf_has_rssi(srslte_rf_t *h);

SRSLTE_API float srslte_rf_get_rssi(srslte_rf_t *h); 

SRSLTE_API bool srslte_rf_rx_wait_lo_locked(srslte_rf_t *h);

SRSLTE_API void srslte_rf_set_master_clock_rate(srslte_rf_t *h, 
                                         double rate); 

SRSLTE_API bool srslte_rf_is_master_clock_dynamic(srslte_rf_t *h); 

SRSLTE_API double srslte_rf_set_rx_srate(srslte_rf_t *h, 
                                  double freq);

SRSLTE_API double srslte_rf_set_rx_gain(srslte_rf_t *h, 
                                 double gain);

SRSLTE_API void srslte_rf_set_tx_rx_gain_offset(srslte_rf_t *h, 
                                         double offset); 

SRSLTE_API double srslte_rf_set_rx_gain_th(srslte_rf_t *h, 
                                    double gain);

SRSLTE_API double srslte_rf_get_rx_gain(srslte_rf_t *h);

SRSLTE_API double srslte_rf_get_tx_gain(srslte_rf_t *h);

SRSLTE_API void srslte_rf_suppress_stdout(srslte_rf_t *h);

SRSLTE_API void srslte_rf_register_error_handler(srslte_rf_t *h, 
                                                 srslte_rf_error_handler_t error_handler);

SRSLTE_API double srslte_rf_set_rx_freq(srslte_rf_t *h, 
                                 double freq);

SRSLTE_API int srslte_rf_recv(srslte_rf_t *h, 
                       void *data, 
                       uint32_t nsamples, 
                       bool blocking);

SRSLTE_API int srslte_rf_recv_with_time(srslte_rf_t *h,
                                 void *data,
                                 uint32_t nsamples,
                                 bool blocking,
                                 time_t *secs,
                                 double *frac_secs);

SRSLTE_API int srslte_rf_recv_with_time_multi(srslte_rf_t *h,
                                              void **data,
                                              uint32_t nsamples,
                                              bool blocking,
                                              time_t *secs,
                                              double *frac_secs);

SRSLTE_API double srslte_rf_set_tx_srate(srslte_rf_t *h, 
                                  double freq);

SRSLTE_API double srslte_rf_set_tx_gain(srslte_rf_t *h, 
                                 double gain);

SRSLTE_API double srslte_rf_set_tx_freq(srslte_rf_t *h,
                                 double freq);

SRSLTE_API void srslte_rf_get_time(srslte_rf_t *h, 
                            time_t *secs, 
                            double *frac_secs); 

SRSLTE_API int srslte_rf_send(srslte_rf_t *h, 
                       void *data, 
                       uint32_t nsamples, 
                       bool blocking);

SRSLTE_API int srslte_rf_send2(srslte_rf_t *h, 
                        void *data, 
                        uint32_t nsamples, 
                        bool blocking, 
                        bool start_of_burst, 
                        bool end_of_burst); 

SRSLTE_API int srslte_rf_send(srslte_rf_t *h, 
                       void *data, 
                       uint32_t nsamples, 
                       bool blocking);


SRSLTE_API int srslte_rf_send_timed(srslte_rf_t *h,
                             void *data,
                             int nsamples,
                             time_t secs,
                             double frac_secs);

SRSLTE_API int srslte_rf_send_timed2(srslte_rf_t *h,
                              void *data,
                              int nsamples,
                              time_t secs,
                              double frac_secs,                      
                              bool is_start_of_burst,
                              bool is_end_of_burst);

SRSLTE_API int srslte_rf_send_timed_multi(srslte_rf_t *rf,
                                          void *data[4],
                                          int nsamples,
                                          time_t secs,
                                          double frac_secs,
                                          bool blocking,
                                          bool is_start_of_burst,
                                          bool is_end_of_burst);

SRSLTE_API int srslte_rf_send_multi(srslte_rf_t *rf,
                                    void *data[4],
                                    int nsamples,
                                    bool blocking,
                                    bool is_start_of_burst,
                                    bool is_end_of_burst);

#endif