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comparison trau-decode/parse-amr.c @ 81:9eff2af191d5

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trau-parse: AMR 10k2 CRC
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 08 Feb 2025 20:36:23 +0000
parents 58dfdb2fc6df
children 31a8d34b71ed
comparison
equal deleted inserted replaced
80:58dfdb2fc6df 81:9eff2af191d5
89 89
90 static void 90 static void
91 decode_mode_6(c_bits, d_bits) 91 decode_mode_6(c_bits, d_bits)
92 ubit_t *c_bits, *d_bits; 92 ubit_t *c_bits, *d_bits;
93 { 93 {
94 ubit_t crc_collect[82];
95 int crc1, crc2, crc3, crc4;
96
97 bcopy(c_bits, crc_collect, 25);
98 bcopy(d_bits, crc_collect + 25, 45);
99 bcopy(d_bits + 46, crc_collect + 70, 8);
100 bcopy(d_bits + 85, crc_collect + 78, 2);
101 bcopy(d_bits + 88, crc_collect + 80, 2);
102 crc1 = osmo_crc8gen_check_bits(&gsm0860_amr_crc3, crc_collect, 82,
103 d_bits + 92);
104 bcopy(d_bits + 95, crc_collect, 4);
105 bcopy(d_bits + 131, crc_collect + 4, 2);
106 bcopy(d_bits + 134, crc_collect + 6, 2);
107 crc2 = osmo_crc8gen_check_bits(&gsm0860_amr_crc3, crc_collect, 8,
108 d_bits + 138);
109 bcopy(d_bits + 141, crc_collect, 8);
110 bcopy(d_bits + 180, crc_collect + 8, 2);
111 bcopy(d_bits + 183, crc_collect + 10, 2);
112 crc3 = osmo_crc8gen_check_bits(&gsm0860_amr_crc3, crc_collect, 12,
113 d_bits + 187);
114 bcopy(d_bits + 190, crc_collect, 4);
115 bcopy(d_bits + 226, crc_collect + 4, 2);
116 bcopy(d_bits + 229, crc_collect + 6, 2);
117 bcopy(d_bits + 233, crc_collect + 8, 20);
118 crc4 = osmo_crc8gen_check_bits(&gsm0860_amr_crc3, crc_collect, 28,
119 d_bits + 253);
120 printf(" CRC %s %s %s %s\n",
121 crc1 ? "bad" : "good", crc2 ? "bad" : "good",
122 crc3 ? "bad" : "good", crc4 ? "bad" : "good");
94 } 123 }
95 124
96 static void 125 static void
97 decode_mode_7(c_bits, d_bits) 126 decode_mode_7(c_bits, d_bits)
98 ubit_t *c_bits, *d_bits; 127 ubit_t *c_bits, *d_bits;