/* -*- c++ -*- */
/*
 * gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
 *
 *  Copyright (C) 2019, Libre Space Foundation <http://libre.space>
 *
 *  This program 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 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef INCLUDED_SATNOGS_AMSAT_DUV_DECODER_H
#define INCLUDED_SATNOGS_AMSAT_DUV_DECODER_H

#include <satnogs/api.h>
#include <satnogs/decoder.h>
#include <string>
#include <deque>

namespace gr {
namespace satnogs {

/*!
 * \brief AMSAT 8b10b + CCSDS RS DUV decoder
 *
 */
class SATNOGS_API amsat_duv_decoder : public decoder {
public:

  static const size_t
  amsat_fox_duv_frame_size;

  static const uint8_t
  amsat_fox_spacecraft_id[];

  static decoder::decoder_sptr
  make(const std::string &control_symbol, size_t max_frame_len = 96);

  amsat_duv_decoder(const std::string &control_symbol, size_t max_frame_len);
  ~amsat_duv_decoder();

  decoder_status_t
  decode(const void *in, int len);

  void
  reset();

private:
  typedef enum {
    SEARCH_SYNC, DECODING
  } d_state_t;

  size_t d_erasure_cnt;
  uint16_t d_control_symbol_pos;
  uint16_t d_control_symbol_neg;
  uint16_t d_data_reg;
  uint16_t d_wrong_bits;
  uint16_t d_wrong_bits_neg;
  uint8_t d_nwrong;
  uint8_t d_nwrong_neg;
  size_t d_word_cnt;

  uint8_t *d_8b_words;
  int *d_erasures_indexes;
  d_state_t d_state;
  size_t d_bitstream_idx;
  std::deque<uint8_t> d_bitstream;

  bool
  set_access_code(const std::string &control_symbol);

  void
  process_10b(uint16_t word, size_t write_pos);

  inline uint16_t
  pack_10b_word(size_t idx);

  int d_lookup_8b10b[2][256] = {
    // RD = -1 cases
    {
      /* 00 */0x274,
      /* 01 */0x1d4,
      /* 02 */0x2d4,
      /* 03 */0x71b,
      /* 04 */0x354,
      /* 05 */0x69b,
      /* 06 */0x59b,
      /* 07 */0x78b,
      /* 08 */0x394,
      /* 09 */0x65b,
      /* 0a */0x55b,
      /* 0b */0x74b,
      /* 0c */0x4db,
      /* 0d */0x6cb,
      /* 0e */0x5cb,
      /* 0f */0x174,
      /* 10 */0x1b4,
      /* 11 */0x63b,
      /* 12 */0x53b,
      /* 13 */0x72b,
      /* 14 */0x4bb,
      /* 15 */0x6ab,
      /* 16 */0x5ab,
      /* 17 */0x3a4,
      /* 18 */0x334,
      /* 19 */0x66b,
      /* 1a */0x56b,
      /* 1b */0x364,
      /* 1c */0x4eb,
      /* 1d */0x2e4,
      /* 1e */0x1e4,
      /* 1f */0x2b4,
      /* 20 */0x679,
      /* 21 */0x5d9,
      /* 22 */0x6d9,
      /* 23 */0x319,
      /* 24 */0x759,
      /* 25 */0x299,
      /* 26 */0x199,
      /* 27 */0x389,
      /* 28 */0x799,
      /* 29 */0x259,
      /* 2a */0x159,
      /* 2b */0x349,
      /* 2c */0x0d9,
      /* 2d */0x2c9,
      /* 2e */0x1c9,
      /* 2f */0x579,
      /* 30 */0x5b9,
      /* 31 */0x239,
      /* 32 */0x139,
      /* 33 */0x329,
      /* 34 */0x0b9,
      /* 35 */0x2a9,
      /* 36 */0x1a9,
      /* 37 */0x7a9,
      /* 38 */0x739,
      /* 39 */0x269,
      /* 3a */0x169,
      /* 3b */0x769,
      /* 3c */0x0e9,
      /* 3d */0x6e9,
      /* 3e */0x5e9,
      /* 3f */0x6b9,
      /* 40 */0x675,
      /* 41 */0x5d5,
      /* 42 */0x6d5,
      /* 43 */0x315,
      /* 44 */0x755,
      /* 45 */0x295,
      /* 46 */0x195,
      /* 47 */0x385,
      /* 48 */0x795,
      /* 49 */0x255,
      /* 4a */0x155,
      /* 4b */0x345,
      /* 4c */0x0d5,
      /* 4d */0x2c5,
      /* 4e */0x1c5,
      /* 4f */0x575,
      /* 50 */0x5b5,
      /* 51 */0x235,
      /* 52 */0x135,
      /* 53 */0x325,
      /* 54 */0x0b5,
      /* 55 */0x2a5,
      /* 56 */0x1a5,
      /* 57 */0x7a5,
      /* 58 */0x735,
      /* 59 */0x265,
      /* 5a */0x165,
      /* 5b */0x765,
      /* 5c */0x0e5,
      /* 5d */0x6e5,
      /* 5e */0x5e5,
      /* 5f */0x6b5,
      /* 60 */0x673,
      /* 61 */0x5d3,
      /* 62 */0x6d3,
      /* 63 */0x31c,
      /* 64 */0x753,
      /* 65 */0x29c,
      /* 66 */0x19c,
      /* 67 */0x38c,
      /* 68 */0x793,
      /* 69 */0x25c,
      /* 6a */0x15c,
      /* 6b */0x34c,
      /* 6c */0x0dc,
      /* 6d */0x2cc,
      /* 6e */0x1cc,
      /* 6f */0x573,
      /* 70 */0x5b3,
      /* 71 */0x23c,
      /* 72 */0x13c,
      /* 73 */0x32c,
      /* 74 */0x0bc,
      /* 75 */0x2ac,
      /* 76 */0x1ac,
      /* 77 */0x7a3,
      /* 78 */0x733,
      /* 79 */0x26c,
      /* 7a */0x16c,
      /* 7b */0x763,
      /* 7c */0x0ec,
      /* 7d */0x6e3,
      /* 7e */0x5e3,
      /* 7f */0x6b3,
      /* 80 */0x272,
      /* 81 */0x1d2,
      /* 82 */0x2d2,
      /* 83 */0x71d,
      /* 84 */0x352,
      /* 85 */0x69d,
      /* 86 */0x59d,
      /* 87 */0x78d,
      /* 88 */0x392,
      /* 89 */0x65d,
      /* 8a */0x55d,
      /* 8b */0x74d,
      /* 8c */0x4dd,
      /* 8d */0x6cd,
      /* 8e */0x5cd,
      /* 8f */0x172,
      /* 90 */0x1b2,
      /* 91 */0x63d,
      /* 92 */0x53d,
      /* 93 */0x72d,
      /* 94 */0x4bd,
      /* 95 */0x6ad,
      /* 96 */0x5ad,
      /* 97 */0x3a2,
      /* 98 */0x332,
      /* 99 */0x66d,
      /* 9a */0x56d,
      /* 9b */0x362,
      /* 9c */0x4ed,
      /* 9d */0x2e2,
      /* 9e */0x1e2,
      /* 9f */0x2b2,
      /* a0 */0x67a,
      /* a1 */0x5da,
      /* a2 */0x6da,
      /* a3 */0x31a,
      /* a4 */0x75a,
      /* a5 */0x29a,
      /* a6 */0x19a,
      /* a7 */0x38a,
      /* a8 */0x79a,
      /* a9 */0x25a,
      /* aa */0x15a,
      /* ab */0x34a,
      /* ac */0x0da,
      /* ad */0x2ca,
      /* ae */0x1ca,
      /* af */0x57a,
      /* b0 */0x5ba,
      /* b1 */0x23a,
      /* b2 */0x13a,
      /* b3 */0x32a,
      /* b4 */0x0ba,
      /* b5 */0x2aa,
      /* b6 */0x1aa,
      /* b7 */0x7aa,
      /* b8 */0x73a,
      /* b9 */0x26a,
      /* ba */0x16a,
      /* bb */0x76a,
      /* bc */0x0ea,
      /* bd */0x6ea,
      /* be */0x5ea,
      /* bf */0x6ba,
      /* c0 */0x676,
      /* c1 */0x5d6,
      /* c2 */0x6d6,
      /* c3 */0x316,
      /* c4 */0x756,
      /* c5 */0x296,
      /* c6 */0x196,
      /* c7 */0x386,
      /* c8 */0x796,
      /* c9 */0x256,
      /* ca */0x156,
      /* cb */0x346,
      /* cc */0x0d6,
      /* cd */0x2c6,
      /* ce */0x1c6,
      /* cf */0x576,
      /* d0 */0x5b6,
      /* d1 */0x236,
      /* d2 */0x136,
      /* d3 */0x326,
      /* d4 */0x0b6,
      /* d5 */0x2a6,
      /* d6 */0x1a6,
      /* d7 */0x7a6,
      /* d8 */0x736,
      /* d9 */0x266,
      /* da */0x166,
      /* db */0x766,
      /* dc */0x0e6,
      /* dd */0x6e6,
      /* de */0x5e6,
      /* df */0x6b6,
      /* e0 */0x271,
      /* e1 */0x1d1,
      /* e2 */0x2d1,
      /* e3 */0x71e,
      /* e4 */0x351,
      /* e5 */0x69e,
      /* e6 */0x59e,
      /* e7 */0x78e,
      /* e8 */0x391,
      /* e9 */0x65e,
      /* ea */0x55e,
      /* eb */0x74e,
      /* ec */0x4de,
      /* ed */0x6ce,
      /* ee */0x5ce,
      /* ef */0x171,
      /* f0 */0x1b1,
      /* f1 */0x637,
      /* f2 */0x537,
      /* f3 */0x72e,
      /* f4 */0x4b7,
      /* f5 */0x6ae,
      /* f6 */0x5ae,
      /* f7 */0x3a1,
      /* f8 */0x331,
      /* f9 */0x66e,
      /* fa */0x56e,
      /* fb */0x361,
      /* fc */0x4ee,
      /* fd */0x2e1,
      /* fe */0x1e1,
      /* ff */0x2b1,
    },   // RD = +1 cases
    {
      /* 00 */0x58b,
      /* 01 */0x62b,
      /* 02 */0x52b,
      /* 03 */0x314,
      /* 04 */0x4ab,
      /* 05 */0x294,
      /* 06 */0x194,
      /* 07 */0x074,
      /* 08 */0x46b,
      /* 09 */0x254,
      /* 0a */0x154,
      /* 0b */0x344,
      /* 0c */0x0d4,
      /* 0d */0x2c4,
      /* 0e */0x1c4,
      /* 0f */0x68b,
      /* 10 */0x64b,
      /* 11 */0x234,
      /* 12 */0x134,
      /* 13 */0x324,
      /* 14 */0x0b4,
      /* 15 */0x2a4,
      /* 16 */0x1a4,
      /* 17 */0x45b,
      /* 18 */0x4cb,
      /* 19 */0x264,
      /* 1a */0x164,
      /* 1b */0x49b,
      /* 1c */0x0e4,
      /* 1d */0x51b,
      /* 1e */0x61b,
      /* 1f */0x54b,
      /* 20 */0x189,
      /* 21 */0x229,
      /* 22 */0x129,
      /* 23 */0x719,
      /* 24 */0x0a9,
      /* 25 */0x699,
      /* 26 */0x599,
      /* 27 */0x479,
      /* 28 */0x069,
      /* 29 */0x659,
      /* 2a */0x559,
      /* 2b */0x749,
      /* 2c */0x4d9,
      /* 2d */0x6c9,
      /* 2e */0x5c9,
      /* 2f */0x289,
      /* 30 */0x249,
      /* 31 */0x639,
      /* 32 */0x539,
      /* 33 */0x729,
      /* 34 */0x4b9,
      /* 35 */0x6a9,
      /* 36 */0x5a9,
      /* 37 */0x059,
      /* 38 */0x0c9,
      /* 39 */0x669,
      /* 3a */0x569,
      /* 3b */0x099,
      /* 3c */0x4e9,
      /* 3d */0x119,
      /* 3e */0x219,
      /* 3f */0x149,
      /* 40 */0x185,
      /* 41 */0x225,
      /* 42 */0x125,
      /* 43 */0x715,
      /* 44 */0x0a5,
      /* 45 */0x695,
      /* 46 */0x595,
      /* 47 */0x475,
      /* 48 */0x065,
      /* 49 */0x655,
      /* 4a */0x555,
      /* 4b */0x745,
      /* 4c */0x4d5,
      /* 4d */0x6c5,
      /* 4e */0x5c5,
      /* 4f */0x285,
      /* 50 */0x245,
      /* 51 */0x635,
      /* 52 */0x535,
      /* 53 */0x725,
      /* 54 */0x4b5,
      /* 55 */0x6a5,
      /* 56 */0x5a5,
      /* 57 */0x055,
      /* 58 */0x0c5,
      /* 59 */0x665,
      /* 5a */0x565,
      /* 5b */0x095,
      /* 5c */0x4e5,
      /* 5d */0x115,
      /* 5e */0x215,
      /* 5f */0x145,
      /* 60 */0x18c,
      /* 61 */0x22c,
      /* 62 */0x12c,
      /* 63 */0x713,
      /* 64 */0x0ac,
      /* 65 */0x693,
      /* 66 */0x593,
      /* 67 */0x473,
      /* 68 */0x06c,
      /* 69 */0x653,
      /* 6a */0x553,
      /* 6b */0x743,
      /* 6c */0x4d3,
      /* 6d */0x6c3,
      /* 6e */0x5c3,
      /* 6f */0x28c,
      /* 70 */0x24c,
      /* 71 */0x633,
      /* 72 */0x533,
      /* 73 */0x723,
      /* 74 */0x4b3,
      /* 75 */0x6a3,
      /* 76 */0x5a3,
      /* 77 */0x05c,
      /* 78 */0x0cc,
      /* 79 */0x663,
      /* 7a */0x563,
      /* 7b */0x09c,
      /* 7c */0x4e3,
      /* 7d */0x11c,
      /* 7e */0x21c,
      /* 7f */0x14c,
      /* 80 */0x58d,
      /* 81 */0x62d,
      /* 82 */0x52d,
      /* 83 */0x312,
      /* 84 */0x4ad,
      /* 85 */0x292,
      /* 86 */0x192,
      /* 87 */0x072,
      /* 88 */0x46d,
      /* 89 */0x252,
      /* 8a */0x152,
      /* 8b */0x342,
      /* 8c */0x0d2,
      /* 8d */0x2c2,
      /* 8e */0x1c2,
      /* 8f */0x68d,
      /* 90 */0x64d,
      /* 91 */0x232,
      /* 92 */0x132,
      /* 93 */0x322,
      /* 94 */0x0b2,
      /* 95 */0x2a2,
      /* 96 */0x1a2,
      /* 97 */0x45d,
      /* 98 */0x4cd,
      /* 99 */0x262,
      /* 9a */0x162,
      /* 9b */0x49d,
      /* 9c */0x0e2,
      /* 9d */0x51d,
      /* 9e */0x61d,
      /* 9f */0x54d,
      /* a0 */0x18a,
      /* a1 */0x22a,
      /* a2 */0x12a,
      /* a3 */0x71a,
      /* a4 */0x0aa,
      /* a5 */0x69a,
      /* a6 */0x59a,
      /* a7 */0x47a,
      /* a8 */0x06a,
      /* a9 */0x65a,
      /* aa */0x55a,
      /* ab */0x74a,
      /* ac */0x4da,
      /* ad */0x6ca,
      /* ae */0x5ca,
      /* af */0x28a,
      /* b0 */0x24a,
      /* b1 */0x63a,
      /* b2 */0x53a,
      /* b3 */0x72a,
      /* b4 */0x4ba,
      /* b5 */0x6aa,
      /* b6 */0x5aa,
      /* b7 */0x05a,
      /* b8 */0x0ca,
      /* b9 */0x66a,
      /* ba */0x56a,
      /* bb */0x09a,
      /* bc */0x4ea,
      /* bd */0x11a,
      /* be */0x21a,
      /* bf */0x14a,
      /* c0 */0x186,
      /* c1 */0x226,
      /* c2 */0x126,
      /* c3 */0x716,
      /* c4 */0x0a6,
      /* c5 */0x696,
      /* c6 */0x596,
      /* c7 */0x476,
      /* c8 */0x066,
      /* c9 */0x656,
      /* ca */0x556,
      /* cb */0x746,
      /* cc */0x4d6,
      /* cd */0x6c6,
      /* ce */0x5c6,
      /* cf */0x286,
      /* d0 */0x246,
      /* d1 */0x636,
      /* d2 */0x536,
      /* d3 */0x726,
      /* d4 */0x4b6,
      /* d5 */0x6a6,
      /* d6 */0x5a6,
      /* d7 */0x056,
      /* d8 */0x0c6,
      /* d9 */0x666,
      /* da */0x566,
      /* db */0x096,
      /* dc */0x4e6,
      /* dd */0x116,
      /* de */0x216,
      /* df */0x146,
      /* e0 */0x58e,
      /* e1 */0x62e,
      /* e2 */0x52e,
      /* e3 */0x311,
      /* e4 */0x4ae,
      /* e5 */0x291,
      /* e6 */0x191,
      /* e7 */0x071,
      /* e8 */0x46e,
      /* e9 */0x251,
      /* ea */0x151,
      /* eb */0x348,
      /* ec */0x0d1,
      /* ed */0x2c8,
      /* ee */0x1c8,
      /* ef */0x68e,
      /* f0 */0x64e,
      /* f1 */0x231,
      /* f2 */0x131,
      /* f3 */0x321,
      /* f4 */0x0b1,
      /* f5 */0x2a1,
      /* f6 */0x1a1,
      /* f7 */0x45e,
      /* f8 */0x4ce,
      /* f9 */0x261,
      /* fa */0x161,
      /* fb */0x49e,
      /* fc */0x0e1,
      /* fd */0x51e,
      /* fe */0x61e,
      /* ff */0x54e,
    }
  };
};

} // namespace satnogs
} // namespace gr

#endif /* INCLUDED_SATNOGS_AMSAT_DUV_DECODER_H */