/**
 *
 * \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/.
 *
 */

/******************************************************************************
 *  File:         pusch.h
 *
 *  Description:  Physical uplink shared channel.
 *
 *  Reference:    3GPP TS 36.211 version 10.0.0 Release 10 Sec. 5.3
 *****************************************************************************/

#ifndef SRSLTE_PUSCH_H
#define SRSLTE_PUSCH_H

#include "srslte/config.h"
#include "srslte/phy/common/phy_common.h"
#include "srslte/phy/mimo/precoding.h"
#include "srslte/phy/mimo/layermap.h"
#include "srslte/phy/modem/mod.h"
#include "srslte/phy/modem/demod_soft.h"
#include "srslte/phy/scrambling/scrambling.h"
#include "srslte/phy/phch/regs.h"
#include "srslte/phy/phch/dci.h"
#include "srslte/phy/phch/sch.h"
#include "srslte/phy/phch/pusch_cfg.h"
#include "srslte/phy/dft/dft_precoding.h"
#include "srslte/phy/ch_estimation/refsignal_ul.h"

typedef struct {
  srslte_sequence_t seq[SRSLTE_NOF_SF_X_FRAME];
  uint32_t          cell_id;
  bool              sequence_generated;
} srslte_pusch_user_t;

/* PUSCH object */
typedef struct SRSLTE_API {
  srslte_cell_t cell;

  bool     is_ue;
  uint16_t ue_rnti;
  uint32_t max_re;

  bool llr_is_8bit;

  srslte_dft_precoding_t dft_precoding;  
  
  /* buffers */
  // void buffers are shared for tx and rx
  cf_t *ce;
  cf_t *z;
  cf_t *d;

  void *q;
  void *g;

  /* tx & rx objects */
  srslte_modem_table_t mod[4];
  srslte_sch_t         ul_sch;

  // This is to generate the scrambling seq for multiple CRNTIs
  srslte_pusch_user_t **users;
  srslte_sequence_t tmp_seq;

} srslte_pusch_t;

typedef struct SRSLTE_API {
  uint8_t*           ptr;
  srslte_uci_value_t uci;
} srslte_pusch_data_t;

typedef struct SRSLTE_API {
  uint8_t*           data;
  srslte_uci_value_t uci;
  bool               crc;
  float              avg_iterations_block;
} srslte_pusch_res_t;

SRSLTE_API int srslte_pusch_init_ue(srslte_pusch_t *q,
                                    uint32_t max_prb);

SRSLTE_API int srslte_pusch_init_enb(srslte_pusch_t *q,
                                    uint32_t max_prb);

SRSLTE_API void srslte_pusch_free(srslte_pusch_t *q);

/* These functions modify the state of the object and may take some time */
SRSLTE_API int srslte_pusch_set_cell(srslte_pusch_t *q,
                                     srslte_cell_t cell);

SRSLTE_API int srslte_pusch_set_rnti(srslte_pusch_t* q, uint16_t rnti);

SRSLTE_API void srslte_pusch_free_rnti(srslte_pusch_t *q,
                                       uint16_t rnti);

/* These functions do not modify the state and run in real-time */
SRSLTE_API int srslte_pusch_encode(srslte_pusch_t* q,
                                   srslte_ul_sf_cfg_t* sf,
                                   srslte_pusch_cfg_t* cfg,
                                   srslte_pusch_data_t* data,
                                   cf_t* sf_symbols);

SRSLTE_API int srslte_pusch_decode(srslte_pusch_t*        q,
                                   srslte_ul_sf_cfg_t*    sf,
                                   srslte_pusch_cfg_t*    cfg,
                                   srslte_chest_ul_res_t* channel,
                                   cf_t*                  sf_symbols,
                                   srslte_pusch_res_t*    data);

SRSLTE_API uint32_t srslte_pusch_grant_tx_info(srslte_pusch_grant_t* grant,
                                               srslte_uci_cfg_t* uci_cfg,
                                               srslte_uci_value_t* uci_data,
                                               char* str,
                                               uint32_t str_len);

SRSLTE_API uint32_t srslte_pusch_tx_info(srslte_pusch_cfg_t* cfg,
                                         srslte_uci_value_t* uci_data,
                                         char*               str,
                                         uint32_t            str_len);

SRSLTE_API uint32_t srslte_pusch_rx_info(srslte_pusch_cfg_t* cfg, srslte_pusch_res_t* res, char* str, uint32_t str_len);

#endif // SRSLTE_PUSCH_H