| /* |
| * 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; |
| } |
