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gsm_implode.c

/*
 * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
 * Universitaet Berlin.  See the accompanying file "COPYRIGHT" for
 * details.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
 */

/* $Header: /tmp_amd/presto/export/kbs/jutta/src/gsm/RCS/gsm_implode.c,v 1.2 1996/07/02 14:32:43 jutta Exp jutta $ */

#include "private.h"

#include "gsm.h"
#include "proto.h"

void gsm_implode P3((s, source, c), gsm s, gsm_signal * source, gsm_byte * c)
{
      /*    variable    size  index

            GSM_MAGIC   4     -

            LARc[0]           6     0
            LARc[1]           6     1
            LARc[2]           5     2
            LARc[3]           5     3
            LARc[4]           4     4
            LARc[5]           4     5
            LARc[6]           3     6
            LARc[7]           3     7

            Nc[0]       7     8
            bc[0]       2     9
            Mc[0]       2     10
            xmaxc[0]    6     11
            xmc[0]            3     12
            xmc[1]            3     13
            xmc[2]            3     14
            xmc[3]            3     15
            xmc[4]            3     16
            xmc[5]            3     17
            xmc[6]            3     18
            xmc[7]            3     19
            xmc[8]            3     20
            xmc[9]            3     21
            xmc[10]           3     22
            xmc[11]           3     23
            xmc[12]           3     24

            Nc[1]       7     25
            bc[1]       2     26
            Mc[1]       2     27
            xmaxc[1]    6     28
            xmc[13]           3     29
            xmc[14]           3     30
            xmc[15]           3     31
            xmc[16]           3     32
            xmc[17]           3     33
            xmc[18]           3     34
            xmc[19]           3     35
            xmc[20]           3     36
            xmc[21]           3     37
            xmc[22]           3     38
            xmc[23]           3     39
            xmc[24]           3     40
            xmc[25]           3     41

            Nc[2]       7     42
            bc[2]       2     43
            Mc[2]       2     44
            xmaxc[2]    6     45
            xmc[26]           3     46
            xmc[27]           3     47
            xmc[28]           3     48
            xmc[29]           3     49
            xmc[30]           3     50
            xmc[31]           3     51
            xmc[32]           3     52
            xmc[33]           3     53
            xmc[34]           3     54
            xmc[35]           3     55
            xmc[36]           3     56
            xmc[37]           3     57
            xmc[38]           3     58

            Nc[3]       7     59
            bc[3]       2     60
            Mc[3]       2     61
            xmaxc[3]    6     62
            xmc[39]           3     63
            xmc[40]           3     64
            xmc[41]           3     65
            xmc[42]           3     66
            xmc[43]           3     67
            xmc[44]           3     68
            xmc[45]           3     69
            xmc[46]           3     70
            xmc[47]           3     71
            xmc[48]           3     72
            xmc[49]           3     73
            xmc[50]           3     74
            xmc[51]           3     75
      */

      /*    There are 76 parameters per frame.  The first eight are
       *    unique.  The remaining 68 are four identical subframes of
       *    17 parameters each.  gsm_implode converts from a representation
       *    of these parameters as values in one array of signed words
       *    to the "packed" version of a GSM frame.
       */

#     define      LARc  source
#     define      Nc    *((gsm_signal (*) [17])(source + 8))
#     define      bc    *((gsm_signal (*) [17])(source + 9))
#     define      Mc    *((gsm_signal (*) [17])(source + 10))
#     define      xmaxc *((gsm_signal (*) [17])(source + 11))

#ifdef WAV49
      if (s->wav_fmt) {

            uword sr = 0;
            if (s->frame_index) {
                  sr = sr >> 6 | LARc[0] << 10;
                  sr = sr >> 6 | LARc[1] << 10;
                  *c++ = sr >> 4;
                  sr = sr >> 5 | LARc[2] << 11;
                  *c++ = sr >> 7;
                  sr = sr >> 5 | LARc[3] << 11;
                  sr = sr >> 4 | LARc[4] << 12;
                  *c++ = sr >> 6;
                  sr = sr >> 4 | LARc[5] << 12;
                  sr = sr >> 3 | LARc[6] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | LARc[7] << 13;
                  sr = sr >> 7 | Nc[0] << 9;
                  *c++ = sr >> 5;
                  sr = sr >> 2 | bc[0] << 14;
                  sr = sr >> 2 | Mc[0] << 14;
                  sr = sr >> 6 | xmaxc[0] << 10;
                  *c++ = sr >> 3;
#undef xmc
#define     xmc   (source + 12)

                  sr = sr >> 3 | xmc[0] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[1] << 13;
                  sr = sr >> 3 | xmc[2] << 13;
                  sr = sr >> 3 | xmc[3] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[4] << 13;
                  sr = sr >> 3 | xmc[5] << 13;
                  sr = sr >> 3 | xmc[6] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[7] << 13;
                  sr = sr >> 3 | xmc[8] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[9] << 13;
                  sr = sr >> 3 | xmc[10] << 13;
                  sr = sr >> 3 | xmc[11] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[12] << 13;
                  sr = sr >> 7 | Nc[1] << 9;
                  *c++ = sr >> 5;
                  sr = sr >> 2 | bc[1] << 14;
                  sr = sr >> 2 | Mc[1] << 14;
                  sr = sr >> 6 | xmaxc[1] << 10;
                  *c++ = sr >> 3;
#undef      xmc
#define     xmc   (source + 29 - 13)

                  sr = sr >> 3 | xmc[13] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[14] << 13;
                  sr = sr >> 3 | xmc[15] << 13;
                  sr = sr >> 3 | xmc[16] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[17] << 13;
                  sr = sr >> 3 | xmc[18] << 13;
                  sr = sr >> 3 | xmc[19] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[20] << 13;
                  sr = sr >> 3 | xmc[21] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[22] << 13;
                  sr = sr >> 3 | xmc[23] << 13;
                  sr = sr >> 3 | xmc[24] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[25] << 13;
                  sr = sr >> 7 | Nc[2] << 9;
                  *c++ = sr >> 5;
                  sr = sr >> 2 | bc[2] << 14;
                  sr = sr >> 2 | Mc[2] << 14;
                  sr = sr >> 6 | xmaxc[2] << 10;
                  *c++ = sr >> 3;
#undef      xmc
#define     xmc   (source + 46 - 26)

                  sr = sr >> 3 | xmc[26] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[27] << 13;
                  sr = sr >> 3 | xmc[28] << 13;
                  sr = sr >> 3 | xmc[29] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[30] << 13;
                  sr = sr >> 3 | xmc[31] << 13;
                  sr = sr >> 3 | xmc[32] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[33] << 13;
                  sr = sr >> 3 | xmc[34] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[35] << 13;
                  sr = sr >> 3 | xmc[36] << 13;
                  sr = sr >> 3 | xmc[37] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[38] << 13;
                  sr = sr >> 7 | Nc[3] << 9;
                  *c++ = sr >> 5;
                  sr = sr >> 2 | bc[3] << 14;
                  sr = sr >> 2 | Mc[3] << 14;
                  sr = sr >> 6 | xmaxc[3] << 10;
                  *c++ = sr >> 3;
#undef      xmc
#define     xmc   (source + 63 - 39)

                  sr = sr >> 3 | xmc[39] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[40] << 13;
                  sr = sr >> 3 | xmc[41] << 13;
                  sr = sr >> 3 | xmc[42] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[43] << 13;
                  sr = sr >> 3 | xmc[44] << 13;
                  sr = sr >> 3 | xmc[45] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[46] << 13;
                  sr = sr >> 3 | xmc[47] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[48] << 13;
                  sr = sr >> 3 | xmc[49] << 13;
                  sr = sr >> 3 | xmc[50] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[51] << 13;
                  sr = sr >> 4;
                  *c = sr >> 8;
                  s->frame_chain = *c;
            }
            else {
                  sr = sr >> 4 | s->frame_chain << 12;
                  sr = sr >> 6 | LARc[0] << 10;
                  *c++ = sr >> 6;
                  sr = sr >> 6 | LARc[1] << 10;
                  *c++ = sr >> 8;
                  sr = sr >> 5 | LARc[2] << 11;
                  sr = sr >> 5 | LARc[3] << 11;
                  *c++ = sr >> 6;
                  sr = sr >> 4 | LARc[4] << 12;
                  sr = sr >> 4 | LARc[5] << 12;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | LARc[6] << 13;
                  sr = sr >> 3 | LARc[7] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 7 | Nc[0] << 9;
                  sr = sr >> 2 | bc[0] << 14;
                  *c++ = sr >> 7;
                  sr = sr >> 2 | Mc[0] << 14;
                  sr = sr >> 6 | xmaxc[0] << 10;
                  *c++ = sr >> 7;
#undef xmc
#define     xmc   (source + 12)

                  sr = sr >> 3 | xmc[0] << 13;
                  sr = sr >> 3 | xmc[1] << 13;
                  sr = sr >> 3 | xmc[2] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[3] << 13;
                  sr = sr >> 3 | xmc[4] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[5] << 13;
                  sr = sr >> 3 | xmc[6] << 13;
                  sr = sr >> 3 | xmc[7] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[8] << 13;
                  sr = sr >> 3 | xmc[9] << 13;
                  sr = sr >> 3 | xmc[10] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[11] << 13;
                  sr = sr >> 3 | xmc[12] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 7 | Nc[1] << 9;
                  sr = sr >> 2 | bc[1] << 14;
                  *c++ = sr >> 7;
                  sr = sr >> 2 | Mc[1] << 14;
                  sr = sr >> 6 | xmaxc[1] << 10;
                  *c++ = sr >> 7;
#undef      xmc
#define     xmc   (source + 29 - 13)

                  sr = sr >> 3 | xmc[13] << 13;
                  sr = sr >> 3 | xmc[14] << 13;
                  sr = sr >> 3 | xmc[15] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[16] << 13;
                  sr = sr >> 3 | xmc[17] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[18] << 13;
                  sr = sr >> 3 | xmc[19] << 13;
                  sr = sr >> 3 | xmc[20] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[21] << 13;
                  sr = sr >> 3 | xmc[22] << 13;
                  sr = sr >> 3 | xmc[23] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[24] << 13;
                  sr = sr >> 3 | xmc[25] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 7 | Nc[2] << 9;
                  sr = sr >> 2 | bc[2] << 14;
                  *c++ = sr >> 7;
                  sr = sr >> 2 | Mc[2] << 14;
                  sr = sr >> 6 | xmaxc[2] << 10;
                  *c++ = sr >> 7;
#undef      xmc
#define     xmc   (source + 46 - 26)

                  sr = sr >> 3 | xmc[26] << 13;
                  sr = sr >> 3 | xmc[27] << 13;
                  sr = sr >> 3 | xmc[28] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[29] << 13;
                  sr = sr >> 3 | xmc[30] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[31] << 13;
                  sr = sr >> 3 | xmc[32] << 13;
                  sr = sr >> 3 | xmc[33] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[34] << 13;
                  sr = sr >> 3 | xmc[35] << 13;
                  sr = sr >> 3 | xmc[36] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[37] << 13;
                  sr = sr >> 3 | xmc[38] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 7 | Nc[3] << 9;
                  sr = sr >> 2 | bc[3] << 14;
                  *c++ = sr >> 7;
                  sr = sr >> 2 | Mc[3] << 14;
                  sr = sr >> 6 | xmaxc[3] << 10;
                  *c++ = sr >> 7;
#undef      xmc
#define     xmc   (source + 63 - 39)

                  sr = sr >> 3 | xmc[39] << 13;
                  sr = sr >> 3 | xmc[40] << 13;
                  sr = sr >> 3 | xmc[41] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[42] << 13;
                  sr = sr >> 3 | xmc[43] << 13;
                  *c++ = sr >> 8;
                  sr = sr >> 3 | xmc[44] << 13;
                  sr = sr >> 3 | xmc[45] << 13;
                  sr = sr >> 3 | xmc[46] << 13;
                  *c++ = sr >> 7;
                  sr = sr >> 3 | xmc[47] << 13;
                  sr = sr >> 3 | xmc[48] << 13;
                  sr = sr >> 3 | xmc[49] << 13;
                  *c++ = sr >> 6;
                  sr = sr >> 3 | xmc[50] << 13;
                  sr = sr >> 3 | xmc[51] << 13;
                  *c++ = sr >> 8;
            }
      }
      else
#endif 
      {

            *c++ =   ((GSM_MAGIC & 0xF) << 4)         /* 1 */
                   | ((LARc[0] >> 2) & 0xF);
            *c++ =   ((LARc[0] & 0x3) << 6)
                   | (LARc[1] & 0x3F);
            *c++ =   ((LARc[2] & 0x1F) << 3)
                   | ((LARc[3] >> 2) & 0x7);
            *c++ =   ((LARc[3] & 0x3) << 6)
                   | ((LARc[4] & 0xF) << 2)
                   | ((LARc[5] >> 2) & 0x3);
            *c++ =   ((LARc[5] & 0x3) << 6)
                   | ((LARc[6] & 0x7) << 3)
                   | (LARc[7] & 0x7);


            *c++ =   ((Nc[0] & 0x7F) << 1)


                   | ((bc[0] >> 1) & 0x1);
            *c++ =   ((bc[0] & 0x1) << 7)


                   | ((Mc[0] & 0x3) << 5)

                   | ((xmaxc[0] >> 1) & 0x1F);
            *c++ =   ((xmaxc[0] & 0x1) << 7)

#undef xmc
#define     xmc   (source + 12)

                   | ((xmc[0] & 0x7) << 4)
                   | ((xmc[1] & 0x7) << 1)
                   | ((xmc[2] >> 2) & 0x1);
            *c++ =   ((xmc[2] & 0x3) << 6)
                   | ((xmc[3] & 0x7) << 3)
                   | (xmc[4] & 0x7);
            *c++ =   ((xmc[5] & 0x7) << 5)                  /* 10 */
                   | ((xmc[6] & 0x7) << 2)
                   | ((xmc[7] >> 1) & 0x3);
            *c++ =   ((xmc[7] & 0x1) << 7)
                   | ((xmc[8] & 0x7) << 4)
                   | ((xmc[9] & 0x7) << 1)
                   | ((xmc[10] >> 2) & 0x1);
            *c++ =   ((xmc[10] & 0x3) << 6)
                   | ((xmc[11] & 0x7) << 3)
                   | (xmc[12] & 0x7);


            *c++ =   ((Nc[1] & 0x7F) << 1)


                   | ((bc[1] >> 1) & 0x1);
            *c++ =   ((bc[1] & 0x1) << 7)


                   | ((Mc[1] & 0x3) << 5)


                   | ((xmaxc[1] >> 1) & 0x1F);
            *c++ =   ((xmaxc[1] & 0x1) << 7)

#undef      xmc
#define     xmc   (source + 29 - 13)

                   | ((xmc[13] & 0x7) << 4)
                   | ((xmc[14] & 0x7) << 1)
                   | ((xmc[15] >> 2) & 0x1);
            *c++ =   ((xmc[15] & 0x3) << 6)
                   | ((xmc[16] & 0x7) << 3)
                   | (xmc[17] & 0x7);
            *c++ =   ((xmc[18] & 0x7) << 5)
                   | ((xmc[19] & 0x7) << 2)
                   | ((xmc[20] >> 1) & 0x3);
            *c++ =   ((xmc[20] & 0x1) << 7)
                   | ((xmc[21] & 0x7) << 4)
                   | ((xmc[22] & 0x7) << 1)
                   | ((xmc[23] >> 2) & 0x1);
            *c++ =   ((xmc[23] & 0x3) << 6)
                   | ((xmc[24] & 0x7) << 3)
                   | (xmc[25] & 0x7);


            *c++ =   ((Nc[2] & 0x7F) << 1)                  /* 20 */


                   | ((bc[2] >> 1) & 0x1);
            *c++ =   ((bc[2] & 0x1) << 7)


                   | ((Mc[2] & 0x3) << 5)


                   | ((xmaxc[2] >> 1) & 0x1F);
            *c++ =   ((xmaxc[2] & 0x1) << 7)

#undef      xmc
#define     xmc   (source + 46 - 26)

                   | ((xmc[26] & 0x7) << 4)
                   | ((xmc[27] & 0x7) << 1)
                   | ((xmc[28] >> 2) & 0x1);
            *c++ =   ((xmc[28] & 0x3) << 6)
                   | ((xmc[29] & 0x7) << 3)
                   | (xmc[30] & 0x7);
            *c++ =   ((xmc[31] & 0x7) << 5)
                   | ((xmc[32] & 0x7) << 2)
                   | ((xmc[33] >> 1) & 0x3);
            *c++ =   ((xmc[33] & 0x1) << 7)
                   | ((xmc[34] & 0x7) << 4)
                   | ((xmc[35] & 0x7) << 1)
                   | ((xmc[36] >> 2) & 0x1);
            *c++ =   ((xmc[36] & 0x3) << 6)
                   | ((xmc[37] & 0x7) << 3)
                   | (xmc[38] & 0x7);


            *c++ =   ((Nc[3] & 0x7F) << 1)


                   | ((bc[3] >> 1) & 0x1);
            *c++ =   ((bc[3] & 0x1) << 7)


                   | ((Mc[3] & 0x3) << 5)


                   | ((xmaxc[3] >> 1) & 0x1F);
            *c++ =   ((xmaxc[3] & 0x1) << 7)

#undef      xmc
#define     xmc   (source + 63 - 39)

                   | ((xmc[39] & 0x7) << 4)
                   | ((xmc[40] & 0x7) << 1)
                   | ((xmc[41] >> 2) & 0x1);
            *c++ =   ((xmc[41] & 0x3) << 6)                 /* 30 */
                   | ((xmc[42] & 0x7) << 3)
                   | (xmc[43] & 0x7);
            *c++ =   ((xmc[44] & 0x7) << 5)
                   | ((xmc[45] & 0x7) << 2)
                   | ((xmc[46] >> 1) & 0x3);
            *c++ =   ((xmc[46] & 0x1) << 7)
                   | ((xmc[47] & 0x7) << 4)
                   | ((xmc[48] & 0x7) << 1)
                   | ((xmc[49] >> 2) & 0x1);
            *c++ =   ((xmc[49] & 0x3) << 6)
                   | ((xmc[50] & 0x7) << 3)
                   | (xmc[51] & 0x7);
      }
}

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