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view miscutil/gsm0610.c @ 416:30f6d1c32c6f
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author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 26 Oct 2018 07:11:08 +0000 |
parents | 08804864172a |
children |
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/* * This code (lifted from OsmocomBB) facilitates the conversion of 33-byte * GSM 06.10 encoded speech frames between the bit order at the 06.10 interface * in the de facto standard libgsm implementation and the bit order at the * 05.03 channel encoder interface, as realized in TI's Calypso DSP. */ #include <sys/types.h> #include <string.h> #include <strings.h> /* GSM FR - subjective importance bit ordering */ /* This array encodes GSM 05.03 Table 2. * It's also GSM 06.10 Table A.2.1a * * It converts between serial parameter output by the encoder and the * order needed before channel encoding. */ const u_short gsm0610_bitorder[260] = { 0, /* LARc0:5 */ 47, /* Xmaxc0:5 */ 103, /* Xmaxc1:5 */ 159, /* Xmaxc2:5 */ 215, /* Xmaxc3:5 */ 1, /* LARc0:4 */ 6, /* LARc1:5 */ 12, /* LARc2:4 */ 2, /* LARc0:3 */ 7, /* LARc1:4 */ 13, /* LARc2:3 */ 17, /* LARc3:4 */ 36, /* Nc0:6 */ 92, /* Nc1:6 */ 148, /* Nc2:6 */ 204, /* Nc3:6 */ 48, /* Xmaxc0:4 */ 104, /* Xmaxc1:4 */ 160, /* Xmaxc2:4 */ 216, /* Xmaxc3:4 */ 8, /* LARc1:3 */ 22, /* LARc4:3 */ 26, /* LARc5:3 */ 37, /* Nc0:5 */ 93, /* Nc1:5 */ 149, /* Nc2:5 */ 205, /* Nc3:5 */ 38, /* Nc0:4 */ 94, /* Nc1:4 */ 150, /* Nc2:4 */ 206, /* Nc3:4 */ 39, /* Nc0:3 */ 95, /* Nc1:3 */ 151, /* Nc2:3 */ 207, /* Nc3:3 */ 40, /* Nc0:2 */ 96, /* Nc1:2 */ 152, /* Nc2:2 */ 208, /* Nc3:2 */ 49, /* Xmaxc0:3 */ 105, /* Xmaxc1:3 */ 161, /* Xmaxc2:3 */ 217, /* Xmaxc3:3 */ 3, /* LARc0:2 */ 18, /* LARc3:3 */ 30, /* LARc6:2 */ 41, /* Nc0:1 */ 97, /* Nc1:1 */ 153, /* Nc2:1 */ 209, /* Nc3:1 */ 23, /* LARc4:2 */ 27, /* LARc5:2 */ 43, /* bc0:1 */ 99, /* bc1:1 */ 155, /* bc2:1 */ 211, /* bc3:1 */ 42, /* Nc0:0 */ 98, /* Nc1:0 */ 154, /* Nc2:0 */ 210, /* Nc3:0 */ 45, /* Mc0:1 */ 101, /* Mc1:1 */ 157, /* Mc2:1 */ 213, /* Mc3:1 */ 4, /* LARc0:1 */ 9, /* LARc1:2 */ 14, /* LARc2:2 */ 33, /* LARc7:2 */ 19, /* LARc3:2 */ 24, /* LARc4:1 */ 31, /* LARc6:1 */ 44, /* bc0:0 */ 100, /* bc1:0 */ 156, /* bc2:0 */ 212, /* bc3:0 */ 50, /* Xmaxc0:2 */ 106, /* Xmaxc1:2 */ 162, /* Xmaxc2:2 */ 218, /* Xmaxc3:2 */ 53, /* xmc0_0:2 */ 56, /* xmc0_1:2 */ 59, /* xmc0_2:2 */ 62, /* xmc0_3:2 */ 65, /* xmc0_4:2 */ 68, /* xmc0_5:2 */ 71, /* xmc0_6:2 */ 74, /* xmc0_7:2 */ 77, /* xmc0_8:2 */ 80, /* xmc0_9:2 */ 83, /* xmc0_10:2 */ 86, /* xmc0_11:2 */ 89, /* xmc0_12:2 */ 109, /* xmc1_0:2 */ 112, /* xmc1_1:2 */ 115, /* xmc1_2:2 */ 118, /* xmc1_3:2 */ 121, /* xmc1_4:2 */ 124, /* xmc1_5:2 */ 127, /* xmc1_6:2 */ 130, /* xmc1_7:2 */ 133, /* xmc1_8:2 */ 136, /* xmc1_9:2 */ 139, /* xmc1_10:2 */ 142, /* xmc1_11:2 */ 145, /* xmc1_12:2 */ 165, /* xmc2_0:2 */ 168, /* xmc2_1:2 */ 171, /* xmc2_2:2 */ 174, /* xmc2_3:2 */ 177, /* xmc2_4:2 */ 180, /* xmc2_5:2 */ 183, /* xmc2_6:2 */ 186, /* xmc2_7:2 */ 189, /* xmc2_8:2 */ 192, /* xmc2_9:2 */ 195, /* xmc2_10:2 */ 198, /* xmc2_11:2 */ 201, /* xmc2_12:2 */ 221, /* xmc3_0:2 */ 224, /* xmc3_1:2 */ 227, /* xmc3_2:2 */ 230, /* xmc3_3:2 */ 233, /* xmc3_4:2 */ 236, /* xmc3_5:2 */ 239, /* xmc3_6:2 */ 242, /* xmc3_7:2 */ 245, /* xmc3_8:2 */ 248, /* xmc3_9:2 */ 251, /* xmc3_10:2 */ 254, /* xmc3_11:2 */ 257, /* xmc3_12:2 */ 46, /* Mc0:0 */ 102, /* Mc1:0 */ 158, /* Mc2:0 */ 214, /* Mc3:0 */ 51, /* Xmaxc0:1 */ 107, /* Xmaxc1:1 */ 163, /* Xmaxc2:1 */ 219, /* Xmaxc3:1 */ 54, /* xmc0_0:1 */ 57, /* xmc0_1:1 */ 60, /* xmc0_2:1 */ 63, /* xmc0_3:1 */ 66, /* xmc0_4:1 */ 69, /* xmc0_5:1 */ 72, /* xmc0_6:1 */ 75, /* xmc0_7:1 */ 78, /* xmc0_8:1 */ 81, /* xmc0_9:1 */ 84, /* xmc0_10:1 */ 87, /* xmc0_11:1 */ 90, /* xmc0_12:1 */ 110, /* xmc1_0:1 */ 113, /* xmc1_1:1 */ 116, /* xmc1_2:1 */ 119, /* xmc1_3:1 */ 122, /* xmc1_4:1 */ 125, /* xmc1_5:1 */ 128, /* xmc1_6:1 */ 131, /* xmc1_7:1 */ 134, /* xmc1_8:1 */ 137, /* xmc1_9:1 */ 140, /* xmc1_10:1 */ 143, /* xmc1_11:1 */ 146, /* xmc1_12:1 */ 166, /* xmc2_0:1 */ 169, /* xmc2_1:1 */ 172, /* xmc2_2:1 */ 175, /* xmc2_3:1 */ 178, /* xmc2_4:1 */ 181, /* xmc2_5:1 */ 184, /* xmc2_6:1 */ 187, /* xmc2_7:1 */ 190, /* xmc2_8:1 */ 193, /* xmc2_9:1 */ 196, /* xmc2_10:1 */ 199, /* xmc2_11:1 */ 202, /* xmc2_12:1 */ 222, /* xmc3_0:1 */ 225, /* xmc3_1:1 */ 228, /* xmc3_2:1 */ 231, /* xmc3_3:1 */ 234, /* xmc3_4:1 */ 237, /* xmc3_5:1 */ 240, /* xmc3_6:1 */ 243, /* xmc3_7:1 */ 246, /* xmc3_8:1 */ 249, /* xmc3_9:1 */ 252, /* xmc3_10:1 */ 255, /* xmc3_11:1 */ 258, /* xmc3_12:1 */ 5, /* LARc0:0 */ 10, /* LARc1:1 */ 15, /* LARc2:1 */ 28, /* LARc5:1 */ 32, /* LARc6:0 */ 34, /* LARc7:1 */ 35, /* LARc7:0 */ 16, /* LARc2:0 */ 20, /* LARc3:1 */ 21, /* LARc3:0 */ 25, /* LARc4:0 */ 52, /* Xmaxc0:0 */ 108, /* Xmaxc1:0 */ 164, /* Xmaxc2:0 */ 220, /* Xmaxc3:0 */ 55, /* xmc0_0:0 */ 58, /* xmc0_1:0 */ 61, /* xmc0_2:0 */ 64, /* xmc0_3:0 */ 67, /* xmc0_4:0 */ 70, /* xmc0_5:0 */ 73, /* xmc0_6:0 */ 76, /* xmc0_7:0 */ 79, /* xmc0_8:0 */ 82, /* xmc0_9:0 */ 85, /* xmc0_10:0 */ 88, /* xmc0_11:0 */ 91, /* xmc0_12:0 */ 111, /* xmc1_0:0 */ 114, /* xmc1_1:0 */ 117, /* xmc1_2:0 */ 120, /* xmc1_3:0 */ 123, /* xmc1_4:0 */ 126, /* xmc1_5:0 */ 129, /* xmc1_6:0 */ 132, /* xmc1_7:0 */ 135, /* xmc1_8:0 */ 138, /* xmc1_9:0 */ 141, /* xmc1_10:0 */ 144, /* xmc1_11:0 */ 147, /* xmc1_12:0 */ 167, /* xmc2_0:0 */ 170, /* xmc2_1:0 */ 173, /* xmc2_2:0 */ 176, /* xmc2_3:0 */ 179, /* xmc2_4:0 */ 182, /* xmc2_5:0 */ 185, /* xmc2_6:0 */ 188, /* xmc2_7:0 */ 191, /* xmc2_8:0 */ 194, /* xmc2_9:0 */ 197, /* xmc2_10:0 */ 200, /* xmc2_11:0 */ 203, /* xmc2_12:0 */ 223, /* xmc3_0:0 */ 226, /* xmc3_1:0 */ 229, /* xmc3_2:0 */ 232, /* xmc3_3:0 */ 235, /* xmc3_4:0 */ 238, /* xmc3_5:0 */ 241, /* xmc3_6:0 */ 244, /* xmc3_7:0 */ 247, /* xmc3_8:0 */ 250, /* xmc3_9:0 */ 253, /* xmc3_10:0 */ 256, /* xmc3_11:0 */ 259, /* xmc3_12:0 */ 11, /* LARc1:0 */ 29, /* LARc5:0 */ }; static int msb_get_bit(buf, bn) u_char *buf; { int pos_byte = bn >> 3; int pos_bit = 7 - (bn & 7); return (buf[pos_byte] >> pos_bit) & 1; } static void msb_set_bit(buf, bn, bit) u_char *buf; { int pos_byte = bn >> 3; int pos_bit = 7 - (bn & 7); buf[pos_byte] |= (bit << pos_bit); } void gsm0610_tidsp_to_libgsm(inbytes, outbytes) u_char *inbytes, *outbytes; { int i, di, si; bzero(outbytes, 33); outbytes[0] = 0xD0; for (i = 0; i < 260; i++) { di = gsm0610_bitorder[i]; si = (i > 181) ? i + 4 : i; msb_set_bit(outbytes, 4 + di, msb_get_bit(inbytes, si)); } } void gsm0610_libgsm_to_tidsp(inbytes, outbytes) u_char *inbytes, *outbytes; { int i, di, si; bzero(outbytes, 33); for (i = 0; i < 260; i++) { si = gsm0610_bitorder[i]; di = (i > 181) ? i + 4 : i; msb_set_bit(outbytes, di, msb_get_bit(inbytes, 4 + si)); } }