/*

 * 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;

}