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-rw-r--r--apps/codecs/libFLAC/crc.c149
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diff --git a/apps/codecs/libFLAC/crc.c b/apps/codecs/libFLAC/crc.c
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1/* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2000,2001,2002,2003,2004,2005 Josh Coalson
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include "private/crc.h"
33
34/* CRC-8, poly = x^8 + x^2 + x^1 + x^0, init = 0 */
35
36FLAC__byte const FLAC__crc8_table[256] = {
37 0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15,
38 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
39 0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65,
40 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
41 0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5,
42 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
43 0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85,
44 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
45 0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2,
46 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
47 0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2,
48 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
49 0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32,
50 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
51 0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42,
52 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
53 0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C,
54 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
55 0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC,
56 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
57 0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C,
58 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
59 0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C,
60 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
61 0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B,
62 0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
63 0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B,
64 0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
65 0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB,
66 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
67 0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB,
68 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
69};
70
71/* CRC-16, poly = x^16 + x^15 + x^2 + x^0, init = 0 */
72
73FLAC__uint16 FLAC__crc16_table[256] = {
74 0x0000, 0x8005, 0x800f, 0x000a, 0x801b, 0x001e, 0x0014, 0x8011,
75 0x8033, 0x0036, 0x003c, 0x8039, 0x0028, 0x802d, 0x8027, 0x0022,
76 0x8063, 0x0066, 0x006c, 0x8069, 0x0078, 0x807d, 0x8077, 0x0072,
77 0x0050, 0x8055, 0x805f, 0x005a, 0x804b, 0x004e, 0x0044, 0x8041,
78 0x80c3, 0x00c6, 0x00cc, 0x80c9, 0x00d8, 0x80dd, 0x80d7, 0x00d2,
79 0x00f0, 0x80f5, 0x80ff, 0x00fa, 0x80eb, 0x00ee, 0x00e4, 0x80e1,
80 0x00a0, 0x80a5, 0x80af, 0x00aa, 0x80bb, 0x00be, 0x00b4, 0x80b1,
81 0x8093, 0x0096, 0x009c, 0x8099, 0x0088, 0x808d, 0x8087, 0x0082,
82 0x8183, 0x0186, 0x018c, 0x8189, 0x0198, 0x819d, 0x8197, 0x0192,
83 0x01b0, 0x81b5, 0x81bf, 0x01ba, 0x81ab, 0x01ae, 0x01a4, 0x81a1,
84 0x01e0, 0x81e5, 0x81ef, 0x01ea, 0x81fb, 0x01fe, 0x01f4, 0x81f1,
85 0x81d3, 0x01d6, 0x01dc, 0x81d9, 0x01c8, 0x81cd, 0x81c7, 0x01c2,
86 0x0140, 0x8145, 0x814f, 0x014a, 0x815b, 0x015e, 0x0154, 0x8151,
87 0x8173, 0x0176, 0x017c, 0x8179, 0x0168, 0x816d, 0x8167, 0x0162,
88 0x8123, 0x0126, 0x012c, 0x8129, 0x0138, 0x813d, 0x8137, 0x0132,
89 0x0110, 0x8115, 0x811f, 0x011a, 0x810b, 0x010e, 0x0104, 0x8101,
90 0x8303, 0x0306, 0x030c, 0x8309, 0x0318, 0x831d, 0x8317, 0x0312,
91 0x0330, 0x8335, 0x833f, 0x033a, 0x832b, 0x032e, 0x0324, 0x8321,
92 0x0360, 0x8365, 0x836f, 0x036a, 0x837b, 0x037e, 0x0374, 0x8371,
93 0x8353, 0x0356, 0x035c, 0x8359, 0x0348, 0x834d, 0x8347, 0x0342,
94 0x03c0, 0x83c5, 0x83cf, 0x03ca, 0x83db, 0x03de, 0x03d4, 0x83d1,
95 0x83f3, 0x03f6, 0x03fc, 0x83f9, 0x03e8, 0x83ed, 0x83e7, 0x03e2,
96 0x83a3, 0x03a6, 0x03ac, 0x83a9, 0x03b8, 0x83bd, 0x83b7, 0x03b2,
97 0x0390, 0x8395, 0x839f, 0x039a, 0x838b, 0x038e, 0x0384, 0x8381,
98 0x0280, 0x8285, 0x828f, 0x028a, 0x829b, 0x029e, 0x0294, 0x8291,
99 0x82b3, 0x02b6, 0x02bc, 0x82b9, 0x02a8, 0x82ad, 0x82a7, 0x02a2,
100 0x82e3, 0x02e6, 0x02ec, 0x82e9, 0x02f8, 0x82fd, 0x82f7, 0x02f2,
101 0x02d0, 0x82d5, 0x82df, 0x02da, 0x82cb, 0x02ce, 0x02c4, 0x82c1,
102 0x8243, 0x0246, 0x024c, 0x8249, 0x0258, 0x825d, 0x8257, 0x0252,
103 0x0270, 0x8275, 0x827f, 0x027a, 0x826b, 0x026e, 0x0264, 0x8261,
104 0x0220, 0x8225, 0x822f, 0x022a, 0x823b, 0x023e, 0x0234, 0x8231,
105 0x8213, 0x0216, 0x021c, 0x8219, 0x0208, 0x820d, 0x8207, 0x0202
106};
107
108
109void FLAC__crc8_update(const FLAC__byte data, FLAC__uint8 *crc)
110{
111 *crc = FLAC__crc8_table[*crc ^ data];
112}
113
114void FLAC__crc8_update_block(const FLAC__byte *data, unsigned len, FLAC__uint8 *crc)
115{
116 while(len--)
117 *crc = FLAC__crc8_table[*crc ^ *data++];
118}
119
120FLAC__uint8 FLAC__crc8(const FLAC__byte *data, unsigned len)
121{
122 FLAC__uint8 crc = 0;
123
124 while(len--)
125 crc = FLAC__crc8_table[crc ^ *data++];
126
127 return crc;
128}
129
130void FLAC__crc16_update(const FLAC__byte data, FLAC__uint16 *crc)
131{
132 *crc = (*crc<<8) ^ FLAC__crc16_table[(*crc>>8) ^ data];
133}
134
135void FLAC__crc16_update_block(const FLAC__byte *data, unsigned len, FLAC__uint16 *crc)
136{
137 while(len--)
138 *crc = (*crc<<8) ^ FLAC__crc16_table[(*crc>>8) ^ *data++];
139}
140
141FLAC__uint16 FLAC__crc16(const FLAC__byte *data, unsigned len)
142{
143 FLAC__uint16 crc = 0;
144
145 while(len--)
146 crc = (crc<<8) ^ FLAC__crc16_table[(crc>>8) ^ *data++];
147
148 return crc;
149}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 01:42:14 +0000