2 * Copyright (c) 2002-2003, Antonin Descampe
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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9 * notice, this list of conditions and the following disclaimer.
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23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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31 unsigned int raw_ct, raw_lenmax, raw_len;
32 unsigned char *raw_bp;
33 unsigned char *raw_start;
34 unsigned char *raw_end;
37 /* Return the number of bytes already encoded. */
41 return raw_bp - raw_start;
45 /* Initialize raw-encoder. */
47 /* <param name="bp">Output buffer.</param> */
48 void raw_init_enc(unsigned char *bp)
57 /* Encode a symbol using the RAW-coder. */
59 /* <param name="d"> The symbol to be encoded (0 or 1).</param> */
60 void raw_encode(int d)
65 raw_c += (d << raw_ct);
84 /* Flush encoded data. */
91 raw_encode(first ? 0 : !(prev));
92 prev = first ? 0 : !(prev);
98 /* Initialize raw-decoder. */
100 void raw_init_dec(unsigned char *bp, int len)
110 /* Decode a symbol using raw-decoder. Cfr p.506 TAUBMAN */
117 if (raw_len == raw_lenmax)
122 raw_c = *(raw_start + raw_len);
127 d = (raw_c >> raw_ct) & 0x01;