/*
|
* 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_decode.c,v 1.2 1996/07/02 09:59:05 jutta Exp $ */
|
|
#include "private.h"
|
|
#include "gsm.h"
|
#include "proto.h"
|
|
int gsm_decode P3((s, c, target), gsm s, gsm_byte * c, gsm_signal * target)
|
{
|
word LARc[8], Nc[4], Mc[4], bc[4], xmaxc[4], xmc[13*4];
|
|
#ifdef WAV49
|
if (s->wav_fmt) {
|
|
uword sr = 0;
|
|
s->frame_index = !s->frame_index;
|
if (s->frame_index) {
|
|
sr = *c++;
|
LARc[0] = sr & 0x3f; sr >>= 6;
|
sr |= (uword)*c++ << 2;
|
LARc[1] = sr & 0x3f; sr >>= 6;
|
sr |= (uword)*c++ << 4;
|
LARc[2] = sr & 0x1f; sr >>= 5;
|
LARc[3] = sr & 0x1f; sr >>= 5;
|
sr |= (uword)*c++ << 2;
|
LARc[4] = sr & 0xf; sr >>= 4;
|
LARc[5] = sr & 0xf; sr >>= 4;
|
sr |= (uword)*c++ << 2; /* 5 */
|
LARc[6] = sr & 0x7; sr >>= 3;
|
LARc[7] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 4;
|
Nc[0] = sr & 0x7f; sr >>= 7;
|
bc[0] = sr & 0x3; sr >>= 2;
|
Mc[0] = sr & 0x3; sr >>= 2;
|
sr |= (uword)*c++ << 1;
|
xmaxc[0] = sr & 0x3f; sr >>= 6;
|
xmc[0] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
xmc[1] = sr & 0x7; sr >>= 3;
|
xmc[2] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2;
|
xmc[3] = sr & 0x7; sr >>= 3;
|
xmc[4] = sr & 0x7; sr >>= 3;
|
xmc[5] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1; /* 10 */
|
xmc[6] = sr & 0x7; sr >>= 3;
|
xmc[7] = sr & 0x7; sr >>= 3;
|
xmc[8] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
xmc[9] = sr & 0x7; sr >>= 3;
|
xmc[10] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2;
|
xmc[11] = sr & 0x7; sr >>= 3;
|
xmc[12] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 4;
|
Nc[1] = sr & 0x7f; sr >>= 7;
|
bc[1] = sr & 0x3; sr >>= 2;
|
Mc[1] = sr & 0x3; sr >>= 2;
|
sr |= (uword)*c++ << 1;
|
xmaxc[1] = sr & 0x3f; sr >>= 6;
|
xmc[13] = sr & 0x7; sr >>= 3;
|
sr = *c++; /* 15 */
|
xmc[14] = sr & 0x7; sr >>= 3;
|
xmc[15] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2;
|
xmc[16] = sr & 0x7; sr >>= 3;
|
xmc[17] = sr & 0x7; sr >>= 3;
|
xmc[18] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1;
|
xmc[19] = sr & 0x7; sr >>= 3;
|
xmc[20] = sr & 0x7; sr >>= 3;
|
xmc[21] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
xmc[22] = sr & 0x7; sr >>= 3;
|
xmc[23] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2;
|
xmc[24] = sr & 0x7; sr >>= 3;
|
xmc[25] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 4; /* 20 */
|
Nc[2] = sr & 0x7f; sr >>= 7;
|
bc[2] = sr & 0x3; sr >>= 2;
|
Mc[2] = sr & 0x3; sr >>= 2;
|
sr |= (uword)*c++ << 1;
|
xmaxc[2] = sr & 0x3f; sr >>= 6;
|
xmc[26] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
xmc[27] = sr & 0x7; sr >>= 3;
|
xmc[28] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2;
|
xmc[29] = sr & 0x7; sr >>= 3;
|
xmc[30] = sr & 0x7; sr >>= 3;
|
xmc[31] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1;
|
xmc[32] = sr & 0x7; sr >>= 3;
|
xmc[33] = sr & 0x7; sr >>= 3;
|
xmc[34] = sr & 0x7; sr >>= 3;
|
sr = *c++; /* 25 */
|
xmc[35] = sr & 0x7; sr >>= 3;
|
xmc[36] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2;
|
xmc[37] = sr & 0x7; sr >>= 3;
|
xmc[38] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 4;
|
Nc[3] = sr & 0x7f; sr >>= 7;
|
bc[3] = sr & 0x3; sr >>= 2;
|
Mc[3] = sr & 0x3; sr >>= 2;
|
sr |= (uword)*c++ << 1;
|
xmaxc[3] = sr & 0x3f; sr >>= 6;
|
xmc[39] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
xmc[40] = sr & 0x7; sr >>= 3;
|
xmc[41] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2; /* 30 */
|
xmc[42] = sr & 0x7; sr >>= 3;
|
xmc[43] = sr & 0x7; sr >>= 3;
|
xmc[44] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1;
|
xmc[45] = sr & 0x7; sr >>= 3;
|
xmc[46] = sr & 0x7; sr >>= 3;
|
xmc[47] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
xmc[48] = sr & 0x7; sr >>= 3;
|
xmc[49] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2;
|
xmc[50] = sr & 0x7; sr >>= 3;
|
xmc[51] = sr & 0x7; sr >>= 3;
|
|
s->frame_chain = sr & 0xf;
|
}
|
else {
|
sr = s->frame_chain;
|
sr |= (uword)*c++ << 4; /* 1 */
|
LARc[0] = sr & 0x3f; sr >>= 6;
|
LARc[1] = sr & 0x3f; sr >>= 6;
|
sr = *c++;
|
LARc[2] = sr & 0x1f; sr >>= 5;
|
sr |= (uword)*c++ << 3;
|
LARc[3] = sr & 0x1f; sr >>= 5;
|
LARc[4] = sr & 0xf; sr >>= 4;
|
sr |= (uword)*c++ << 2;
|
LARc[5] = sr & 0xf; sr >>= 4;
|
LARc[6] = sr & 0x7; sr >>= 3;
|
LARc[7] = sr & 0x7; sr >>= 3;
|
sr = *c++; /* 5 */
|
Nc[0] = sr & 0x7f; sr >>= 7;
|
sr |= (uword)*c++ << 1;
|
bc[0] = sr & 0x3; sr >>= 2;
|
Mc[0] = sr & 0x3; sr >>= 2;
|
sr |= (uword)*c++ << 5;
|
xmaxc[0] = sr & 0x3f; sr >>= 6;
|
xmc[0] = sr & 0x7; sr >>= 3;
|
xmc[1] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1;
|
xmc[2] = sr & 0x7; sr >>= 3;
|
xmc[3] = sr & 0x7; sr >>= 3;
|
xmc[4] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
xmc[5] = sr & 0x7; sr >>= 3;
|
xmc[6] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2; /* 10 */
|
xmc[7] = sr & 0x7; sr >>= 3;
|
xmc[8] = sr & 0x7; sr >>= 3;
|
xmc[9] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1;
|
xmc[10] = sr & 0x7; sr >>= 3;
|
xmc[11] = sr & 0x7; sr >>= 3;
|
xmc[12] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
Nc[1] = sr & 0x7f; sr >>= 7;
|
sr |= (uword)*c++ << 1;
|
bc[1] = sr & 0x3; sr >>= 2;
|
Mc[1] = sr & 0x3; sr >>= 2;
|
sr |= (uword)*c++ << 5;
|
xmaxc[1] = sr & 0x3f; sr >>= 6;
|
xmc[13] = sr & 0x7; sr >>= 3;
|
xmc[14] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1; /* 15 */
|
xmc[15] = sr & 0x7; sr >>= 3;
|
xmc[16] = sr & 0x7; sr >>= 3;
|
xmc[17] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
xmc[18] = sr & 0x7; sr >>= 3;
|
xmc[19] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2;
|
xmc[20] = sr & 0x7; sr >>= 3;
|
xmc[21] = sr & 0x7; sr >>= 3;
|
xmc[22] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1;
|
xmc[23] = sr & 0x7; sr >>= 3;
|
xmc[24] = sr & 0x7; sr >>= 3;
|
xmc[25] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
Nc[2] = sr & 0x7f; sr >>= 7;
|
sr |= (uword)*c++ << 1; /* 20 */
|
bc[2] = sr & 0x3; sr >>= 2;
|
Mc[2] = sr & 0x3; sr >>= 2;
|
sr |= (uword)*c++ << 5;
|
xmaxc[2] = sr & 0x3f; sr >>= 6;
|
xmc[26] = sr & 0x7; sr >>= 3;
|
xmc[27] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1;
|
xmc[28] = sr & 0x7; sr >>= 3;
|
xmc[29] = sr & 0x7; sr >>= 3;
|
xmc[30] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
xmc[31] = sr & 0x7; sr >>= 3;
|
xmc[32] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2;
|
xmc[33] = sr & 0x7; sr >>= 3;
|
xmc[34] = sr & 0x7; sr >>= 3;
|
xmc[35] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1; /* 25 */
|
xmc[36] = sr & 0x7; sr >>= 3;
|
xmc[37] = sr & 0x7; sr >>= 3;
|
xmc[38] = sr & 0x7; sr >>= 3;
|
sr = *c++;
|
Nc[3] = sr & 0x7f; sr >>= 7;
|
sr |= (uword)*c++ << 1;
|
bc[3] = sr & 0x3; sr >>= 2;
|
Mc[3] = sr & 0x3; sr >>= 2;
|
sr |= (uword)*c++ << 5;
|
xmaxc[3] = sr & 0x3f; sr >>= 6;
|
xmc[39] = sr & 0x7; sr >>= 3;
|
xmc[40] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1;
|
xmc[41] = sr & 0x7; sr >>= 3;
|
xmc[42] = sr & 0x7; sr >>= 3;
|
xmc[43] = sr & 0x7; sr >>= 3;
|
sr = *c++; /* 30 */
|
xmc[44] = sr & 0x7; sr >>= 3;
|
xmc[45] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 2;
|
xmc[46] = sr & 0x7; sr >>= 3;
|
xmc[47] = sr & 0x7; sr >>= 3;
|
xmc[48] = sr & 0x7; sr >>= 3;
|
sr |= (uword)*c++ << 1;
|
xmc[49] = sr & 0x7; sr >>= 3;
|
xmc[50] = sr & 0x7; sr >>= 3;
|
xmc[51] = sr & 0x7; sr >>= 3;
|
}
|
}
|
else
|
#endif
|
{
|
/* GSM_MAGIC = (*c >> 4) & 0xF; */
|
|
if (((*c >> 4) & 0x0F) != GSM_MAGIC) return -1;
|
|
LARc[0] = (*c++ & 0xF) << 2; /* 1 */
|
LARc[0] |= (*c >> 6) & 0x3;
|
LARc[1] = *c++ & 0x3F;
|
LARc[2] = (*c >> 3) & 0x1F;
|
LARc[3] = (*c++ & 0x7) << 2;
|
LARc[3] |= (*c >> 6) & 0x3;
|
LARc[4] = (*c >> 2) & 0xF;
|
LARc[5] = (*c++ & 0x3) << 2;
|
LARc[5] |= (*c >> 6) & 0x3;
|
LARc[6] = (*c >> 3) & 0x7;
|
LARc[7] = *c++ & 0x7;
|
Nc[0] = (*c >> 1) & 0x7F;
|
bc[0] = (*c++ & 0x1) << 1;
|
bc[0] |= (*c >> 7) & 0x1;
|
Mc[0] = (*c >> 5) & 0x3;
|
xmaxc[0] = (*c++ & 0x1F) << 1;
|
xmaxc[0] |= (*c >> 7) & 0x1;
|
xmc[0] = (*c >> 4) & 0x7;
|
xmc[1] = (*c >> 1) & 0x7;
|
xmc[2] = (*c++ & 0x1) << 2;
|
xmc[2] |= (*c >> 6) & 0x3;
|
xmc[3] = (*c >> 3) & 0x7;
|
xmc[4] = *c++ & 0x7;
|
xmc[5] = (*c >> 5) & 0x7;
|
xmc[6] = (*c >> 2) & 0x7;
|
xmc[7] = (*c++ & 0x3) << 1; /* 10 */
|
xmc[7] |= (*c >> 7) & 0x1;
|
xmc[8] = (*c >> 4) & 0x7;
|
xmc[9] = (*c >> 1) & 0x7;
|
xmc[10] = (*c++ & 0x1) << 2;
|
xmc[10] |= (*c >> 6) & 0x3;
|
xmc[11] = (*c >> 3) & 0x7;
|
xmc[12] = *c++ & 0x7;
|
Nc[1] = (*c >> 1) & 0x7F;
|
bc[1] = (*c++ & 0x1) << 1;
|
bc[1] |= (*c >> 7) & 0x1;
|
Mc[1] = (*c >> 5) & 0x3;
|
xmaxc[1] = (*c++ & 0x1F) << 1;
|
xmaxc[1] |= (*c >> 7) & 0x1;
|
xmc[13] = (*c >> 4) & 0x7;
|
xmc[14] = (*c >> 1) & 0x7;
|
xmc[15] = (*c++ & 0x1) << 2;
|
xmc[15] |= (*c >> 6) & 0x3;
|
xmc[16] = (*c >> 3) & 0x7;
|
xmc[17] = *c++ & 0x7;
|
xmc[18] = (*c >> 5) & 0x7;
|
xmc[19] = (*c >> 2) & 0x7;
|
xmc[20] = (*c++ & 0x3) << 1;
|
xmc[20] |= (*c >> 7) & 0x1;
|
xmc[21] = (*c >> 4) & 0x7;
|
xmc[22] = (*c >> 1) & 0x7;
|
xmc[23] = (*c++ & 0x1) << 2;
|
xmc[23] |= (*c >> 6) & 0x3;
|
xmc[24] = (*c >> 3) & 0x7;
|
xmc[25] = *c++ & 0x7;
|
Nc[2] = (*c >> 1) & 0x7F;
|
bc[2] = (*c++ & 0x1) << 1; /* 20 */
|
bc[2] |= (*c >> 7) & 0x1;
|
Mc[2] = (*c >> 5) & 0x3;
|
xmaxc[2] = (*c++ & 0x1F) << 1;
|
xmaxc[2] |= (*c >> 7) & 0x1;
|
xmc[26] = (*c >> 4) & 0x7;
|
xmc[27] = (*c >> 1) & 0x7;
|
xmc[28] = (*c++ & 0x1) << 2;
|
xmc[28] |= (*c >> 6) & 0x3;
|
xmc[29] = (*c >> 3) & 0x7;
|
xmc[30] = *c++ & 0x7;
|
xmc[31] = (*c >> 5) & 0x7;
|
xmc[32] = (*c >> 2) & 0x7;
|
xmc[33] = (*c++ & 0x3) << 1;
|
xmc[33] |= (*c >> 7) & 0x1;
|
xmc[34] = (*c >> 4) & 0x7;
|
xmc[35] = (*c >> 1) & 0x7;
|
xmc[36] = (*c++ & 0x1) << 2;
|
xmc[36] |= (*c >> 6) & 0x3;
|
xmc[37] = (*c >> 3) & 0x7;
|
xmc[38] = *c++ & 0x7;
|
Nc[3] = (*c >> 1) & 0x7F;
|
bc[3] = (*c++ & 0x1) << 1;
|
bc[3] |= (*c >> 7) & 0x1;
|
Mc[3] = (*c >> 5) & 0x3;
|
xmaxc[3] = (*c++ & 0x1F) << 1;
|
xmaxc[3] |= (*c >> 7) & 0x1;
|
xmc[39] = (*c >> 4) & 0x7;
|
xmc[40] = (*c >> 1) & 0x7;
|
xmc[41] = (*c++ & 0x1) << 2;
|
xmc[41] |= (*c >> 6) & 0x3;
|
xmc[42] = (*c >> 3) & 0x7;
|
xmc[43] = *c++ & 0x7; /* 30 */
|
xmc[44] = (*c >> 5) & 0x7;
|
xmc[45] = (*c >> 2) & 0x7;
|
xmc[46] = (*c++ & 0x3) << 1;
|
xmc[46] |= (*c >> 7) & 0x1;
|
xmc[47] = (*c >> 4) & 0x7;
|
xmc[48] = (*c >> 1) & 0x7;
|
xmc[49] = (*c++ & 0x1) << 2;
|
xmc[49] |= (*c >> 6) & 0x3;
|
xmc[50] = (*c >> 3) & 0x7;
|
xmc[51] = *c & 0x7; /* 33 */
|
}
|
|
Gsm_Decoder(s, LARc, Nc, bc, Mc, xmaxc, xmc, target);
|
|
return 0;
|
}
|
