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Diffstat (limited to 'libopenjpeg/mqc.c')
| -rw-r--r-- | libopenjpeg/mqc.c | 589 |
1 files changed, 0 insertions, 589 deletions
diff --git a/libopenjpeg/mqc.c b/libopenjpeg/mqc.c deleted file mode 100644 index 4e6c319c..00000000 --- a/libopenjpeg/mqc.c +++ /dev/null @@ -1,589 +0,0 @@ -/* - * Copyright (c) 2001-2002, David Janssens - * Copyright (c) 2002-2003, Yannick Verschueren - * Copyright (c) 2002-2003, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include "mqc.h" -#include <stdio.h> - -/* <summary> */ -/* This struct defines the state of a context. */ -/* </summary> */ -typedef struct mqc_state_s { - unsigned int qeval; /* the probability of the Least Probable Symbol (0.75->0x8000, 1.5->0xffff) */ - int mps; /* the Most Probable Symbol (0 or 1) */ - struct mqc_state_s *nmps; /* next state if the next encoded symbol is the MPS */ - struct mqc_state_s *nlps; /* next state if the next encoded symbol is the LPS */ -} mqc_state_t; - -/* <summary> */ -/* This array defines all the possible states for a context. */ -/* </summary> */ -mqc_state_t mqc_states[47 * 2] = { - {0x5601, 0, &mqc_states[2], &mqc_states[3]}, - {0x5601, 1, &mqc_states[3], &mqc_states[2]}, - {0x3401, 0, &mqc_states[4], &mqc_states[12]}, - {0x3401, 1, &mqc_states[5], &mqc_states[13]}, - {0x1801, 0, &mqc_states[6], &mqc_states[18]}, - {0x1801, 1, &mqc_states[7], &mqc_states[19]}, - {0x0ac1, 0, &mqc_states[8], &mqc_states[24]}, - {0x0ac1, 1, &mqc_states[9], &mqc_states[25]}, - {0x0521, 0, &mqc_states[10], &mqc_states[58]}, - {0x0521, 1, &mqc_states[11], &mqc_states[59]}, - {0x0221, 0, &mqc_states[76], &mqc_states[66]}, - {0x0221, 1, &mqc_states[77], &mqc_states[67]}, - {0x5601, 0, &mqc_states[14], &mqc_states[13]}, - {0x5601, 1, &mqc_states[15], &mqc_states[12]}, - {0x5401, 0, &mqc_states[16], &mqc_states[28]}, - {0x5401, 1, &mqc_states[17], &mqc_states[29]}, - {0x4801, 0, &mqc_states[18], &mqc_states[28]}, - {0x4801, 1, &mqc_states[19], &mqc_states[29]}, - {0x3801, 0, &mqc_states[20], &mqc_states[28]}, - {0x3801, 1, &mqc_states[21], &mqc_states[29]}, - {0x3001, 0, &mqc_states[22], &mqc_states[34]}, - {0x3001, 1, &mqc_states[23], &mqc_states[35]}, - {0x2401, 0, &mqc_states[24], &mqc_states[36]}, - {0x2401, 1, &mqc_states[25], &mqc_states[37]}, - {0x1c01, 0, &mqc_states[26], &mqc_states[40]}, - {0x1c01, 1, &mqc_states[27], &mqc_states[41]}, - {0x1601, 0, &mqc_states[58], &mqc_states[42]}, - {0x1601, 1, &mqc_states[59], &mqc_states[43]}, - {0x5601, 0, &mqc_states[30], &mqc_states[29]}, - {0x5601, 1, &mqc_states[31], &mqc_states[28]}, - {0x5401, 0, &mqc_states[32], &mqc_states[28]}, - {0x5401, 1, &mqc_states[33], &mqc_states[29]}, - {0x5101, 0, &mqc_states[34], &mqc_states[30]}, - {0x5101, 1, &mqc_states[35], &mqc_states[31]}, - {0x4801, 0, &mqc_states[36], &mqc_states[32]}, - {0x4801, 1, &mqc_states[37], &mqc_states[33]}, - {0x3801, 0, &mqc_states[38], &mqc_states[34]}, - {0x3801, 1, &mqc_states[39], &mqc_states[35]}, - {0x3401, 0, &mqc_states[40], &mqc_states[36]}, - {0x3401, 1, &mqc_states[41], &mqc_states[37]}, - {0x3001, 0, &mqc_states[42], &mqc_states[38]}, - {0x3001, 1, &mqc_states[43], &mqc_states[39]}, - {0x2801, 0, &mqc_states[44], &mqc_states[38]}, - {0x2801, 1, &mqc_states[45], &mqc_states[39]}, - {0x2401, 0, &mqc_states[46], &mqc_states[40]}, - {0x2401, 1, &mqc_states[47], &mqc_states[41]}, - {0x2201, 0, &mqc_states[48], &mqc_states[42]}, - {0x2201, 1, &mqc_states[49], &mqc_states[43]}, - {0x1c01, 0, &mqc_states[50], &mqc_states[44]}, - {0x1c01, 1, &mqc_states[51], &mqc_states[45]}, - {0x1801, 0, &mqc_states[52], &mqc_states[46]}, - {0x1801, 1, &mqc_states[53], &mqc_states[47]}, - {0x1601, 0, &mqc_states[54], &mqc_states[48]}, - {0x1601, 1, &mqc_states[55], &mqc_states[49]}, - {0x1401, 0, &mqc_states[56], &mqc_states[50]}, - {0x1401, 1, &mqc_states[57], &mqc_states[51]}, - {0x1201, 0, &mqc_states[58], &mqc_states[52]}, - {0x1201, 1, &mqc_states[59], &mqc_states[53]}, - {0x1101, 0, &mqc_states[60], &mqc_states[54]}, - {0x1101, 1, &mqc_states[61], &mqc_states[55]}, - {0x0ac1, 0, &mqc_states[62], &mqc_states[56]}, - {0x0ac1, 1, &mqc_states[63], &mqc_states[57]}, - {0x09c1, 0, &mqc_states[64], &mqc_states[58]}, - {0x09c1, 1, &mqc_states[65], &mqc_states[59]}, - {0x08a1, 0, &mqc_states[66], &mqc_states[60]}, - {0x08a1, 1, &mqc_states[67], &mqc_states[61]}, - {0x0521, 0, &mqc_states[68], &mqc_states[62]}, - {0x0521, 1, &mqc_states[69], &mqc_states[63]}, - {0x0441, 0, &mqc_states[70], &mqc_states[64]}, - {0x0441, 1, &mqc_states[71], &mqc_states[65]}, - {0x02a1, 0, &mqc_states[72], &mqc_states[66]}, - {0x02a1, 1, &mqc_states[73], &mqc_states[67]}, - {0x0221, 0, &mqc_states[74], &mqc_states[68]}, - {0x0221, 1, &mqc_states[75], &mqc_states[69]}, - {0x0141, 0, &mqc_states[76], &mqc_states[70]}, - {0x0141, 1, &mqc_states[77], &mqc_states[71]}, - {0x0111, 0, &mqc_states[78], &mqc_states[72]}, - {0x0111, 1, &mqc_states[79], &mqc_states[73]}, - {0x0085, 0, &mqc_states[80], &mqc_states[74]}, - {0x0085, 1, &mqc_states[81], &mqc_states[75]}, - {0x0049, 0, &mqc_states[82], &mqc_states[76]}, - {0x0049, 1, &mqc_states[83], &mqc_states[77]}, - {0x0025, 0, &mqc_states[84], &mqc_states[78]}, - {0x0025, 1, &mqc_states[85], &mqc_states[79]}, - {0x0015, 0, &mqc_states[86], &mqc_states[80]}, - {0x0015, 1, &mqc_states[87], &mqc_states[81]}, - {0x0009, 0, &mqc_states[88], &mqc_states[82]}, - {0x0009, 1, &mqc_states[89], &mqc_states[83]}, - {0x0005, 0, &mqc_states[90], &mqc_states[84]}, - {0x0005, 1, &mqc_states[91], &mqc_states[85]}, - {0x0001, 0, &mqc_states[90], &mqc_states[86]}, - {0x0001, 1, &mqc_states[91], &mqc_states[87]}, - {0x5601, 0, &mqc_states[92], &mqc_states[92]}, - {0x5601, 1, &mqc_states[93], &mqc_states[93]}, -}; - -#define MQC_NUMCTXS 32 - -unsigned int mqc_c; -unsigned int mqc_a; -unsigned int mqc_ct; -unsigned char *mqc_bp; -unsigned char *mqc_start; -unsigned char *mqc_end; -mqc_state_t *mqc_ctxs[MQC_NUMCTXS]; -mqc_state_t **mqc_curctx; - -/* <summary> */ -/* Return the number of bytes already encoded. */ -/* </summary> */ -int mqc_numbytes() -{ - return mqc_bp - mqc_start; -} - -/* <summary> */ -/* Output a byte, doing bit-stuffing if necessary. */ -/* After a 0xff byte, the next byte must be smaller than 0x90 */ -/* </summary> */ -void mqc_byteout() -{ - if (*mqc_bp == 0xff) { - mqc_bp++; - *mqc_bp = mqc_c >> 20; - mqc_c &= 0xfffff; - mqc_ct = 7; - } else { - if ((mqc_c & 0x8000000) == 0) { /* ((mqc_c&0x8000000)==0) CHANGE */ - mqc_bp++; - *mqc_bp = mqc_c >> 19; - mqc_c &= 0x7ffff; - mqc_ct = 8; - } else { - (*mqc_bp)++; - if (*mqc_bp == 0xff) { - mqc_c &= 0x7ffffff; - mqc_bp++; - *mqc_bp = mqc_c >> 20; - mqc_c &= 0xfffff; - mqc_ct = 7; - } else { - mqc_bp++; - *mqc_bp = mqc_c >> 19; - mqc_c &= 0x7ffff; - mqc_ct = 8; - } - } - } -} - -/* <summary> */ -/* Renormalize mqc_a and mqc_c while encoding, so that mqc_a stays between 0x8000 and 0x10000 */ -/* </summary> */ -void mqc_renorme() -{ - do { - mqc_a <<= 1; - mqc_c <<= 1; - mqc_ct--; - if (mqc_ct == 0) { - mqc_byteout(); - } - } while ((mqc_a & 0x8000) == 0); -} - -/* <summary> */ -/* Encode the most probable symbol. */ -/* </summary> */ -void mqc_codemps() -{ - mqc_a -= (*mqc_curctx)->qeval; - if ((mqc_a & 0x8000) == 0) { - if (mqc_a < (*mqc_curctx)->qeval) { - mqc_a = (*mqc_curctx)->qeval; - } else { - mqc_c += (*mqc_curctx)->qeval; - } - *mqc_curctx = (*mqc_curctx)->nmps; - mqc_renorme(); - } else { - mqc_c += (*mqc_curctx)->qeval; - } -} - -/* <summary> */ -/* Encode the most least symbol. */ -/* </summary> */ -void mqc_codelps() -{ - mqc_a -= (*mqc_curctx)->qeval; - if (mqc_a < (*mqc_curctx)->qeval) { - mqc_c += (*mqc_curctx)->qeval; - } else { - mqc_a = (*mqc_curctx)->qeval; - } - *mqc_curctx = (*mqc_curctx)->nlps; - mqc_renorme(); -} - -/* <summary> */ -/* Initialize encoder. */ -/* </summary> */ -/* <param name="bp">Output buffer.</param> */ -void mqc_init_enc(unsigned char *bp) -{ - mqc_setcurctx(0); - mqc_a = 0x8000; - mqc_c = 0; - mqc_bp = bp - 1; - mqc_ct = 12; - if (*mqc_bp == 0xff) { - mqc_ct = 13; - } - mqc_start = bp; -} - -/* <summary> */ -/* Set current context. */ -/* </summary> */ -/* <param name="ctxno">Context number.</param> */ -void mqc_setcurctx(int ctxno) -{ - mqc_curctx = &mqc_ctxs[ctxno]; -} - -/* <summary> */ -/* Encode a symbol using the MQ-coder. */ -/* </summary> */ -/* <param name="d"> The symbol to be encoded (0 or 1).</param> */ -void mqc_encode(int d) -{ - if ((*mqc_curctx)->mps == d) { - mqc_codemps(); - } else { - mqc_codelps(); - } -} - -/* <summary> */ -/* Fill mqc_c with 1's for flushing */ -/* </summary> */ -void mqc_setbits() -{ - unsigned int tempc = mqc_c + mqc_a; - mqc_c |= 0xffff; - if (mqc_c >= tempc) { - mqc_c -= 0x8000; - } -} - -/* <summary> */ -/* Flush encoded data. */ -/* </summary> */ -void mqc_flush() -{ - mqc_setbits(); - mqc_c <<= mqc_ct; - mqc_byteout(); - mqc_c <<= mqc_ct; - mqc_byteout(); - - if (*mqc_bp != 0xff) { - mqc_bp++; - } -} - -/* <summary> */ -/* not fully implemented and tested !! */ -/* BYPASS mode switch, initialization operation */ -/* JPEG 2000 p 505 */ -/* </summary> */ -void mqc_bypass_init_enc() -{ - mqc_c = 0; - mqc_ct = 8; - /*if (*mqc_bp == 0xff) { - mqc_ct = 7; - }*/ -} - -/* <summary> */ -/* not fully implemented and tested !! */ -/* BYPASS mode switch, coding operation */ -/* JPEG 2000 p 505 */ -/* </summary> */ -void mqc_bypass_enc(int d) -{ - mqc_ct--; - mqc_c = mqc_c + (d << mqc_ct); - if (mqc_ct == 0) - { - mqc_bp++; - *mqc_bp = mqc_c; - mqc_ct = 8; - if (*mqc_bp == 0xff) { - mqc_ct = 7; - } - mqc_c = 0; - } -} - -/* <summary> */ -/* not fully implemented and tested !! */ -/* BYPASS mode switch, flush operation */ -/* </summary> */ -int mqc_bypass_flush_enc() -{ - unsigned char bit_padding; - - bit_padding = 0; - - if (mqc_ct != 0) { - while (mqc_ct > 0) { - mqc_ct--; - mqc_c += bit_padding << mqc_ct; - bit_padding = (bit_padding + 1) & 0x01; - } - mqc_bp++; - *mqc_bp = mqc_c; - mqc_ct = 8; - mqc_c = 0; - } - - return 1; -} - -/* <summary> */ -/* RESET mode switch */ -/* </summary> */ -void mqc_reset_enc() -{ - mqc_resetstates(); - mqc_setstate(18, 0, 46); - mqc_setstate(0, 0, 3); - mqc_setstate(1, 0, 4); -} - -/* <summary> */ -/* mode switch RESTART (TERMALL) */ -/* </summary> */ -int mqc_restart_enc() -{ - int correction = 1; - - /* <flush part> */ - int n = 27 - 15 - mqc_ct; - mqc_c <<= mqc_ct; - while (n > 0) { - mqc_byteout(); - n -= mqc_ct; - mqc_c <<= mqc_ct; - } - mqc_byteout(); - - return correction; -} - -/* <summary> */ -/* mode switch RESTART (TERMALL) reinitialisation */ -/* </summary> */ -void mqc_restart_init_enc() -{ - /* <Re-init part> */ - mqc_setcurctx(0); - mqc_a = 0x8000; - mqc_c = 0; - mqc_ct = 12; - mqc_bp--; - if (*mqc_bp == 0xff) { - mqc_ct = 13; - } -} - - -/* <summary> */ -/* ERTERM mode switch */ -/* </summary> */ -void mqc_erterm_enc() -{ - int k = 11 - mqc_ct + 1; - - while (k > 0) { - mqc_c <<= mqc_ct; - mqc_ct = 0; - mqc_byteout(); - k -= mqc_ct; - } - - if (*mqc_bp != 0xff) { - mqc_byteout(); - } -} - -/* <summary> */ -/* SEGMARK mode switch (SEGSYM) */ -/* </summary> */ -void mqc_segmark_enc() -{ - int i; - mqc_setcurctx(18); - - for (i = 1; i < 5; i++) { - mqc_encode(i % 2); - } -} - -/* <summary> */ -/* </summary> */ -int mqc_mpsexchange() -{ - int d; - if (mqc_a < (*mqc_curctx)->qeval) { - d = 1 - (*mqc_curctx)->mps; - *mqc_curctx = (*mqc_curctx)->nlps; - } else { - d = (*mqc_curctx)->mps; - *mqc_curctx = (*mqc_curctx)->nmps; - } - return d; -} - -/* <summary> */ -/* </summary> */ -int mqc_lpsexchange() -{ - int d; - if (mqc_a < (*mqc_curctx)->qeval) { - mqc_a = (*mqc_curctx)->qeval; - d = (*mqc_curctx)->mps; - *mqc_curctx = (*mqc_curctx)->nmps; - } else { - mqc_a = (*mqc_curctx)->qeval; - d = 1 - (*mqc_curctx)->mps; - *mqc_curctx = (*mqc_curctx)->nlps; - } - return d; -} - -/* <summary> */ -/* Input a byte. */ -/* </summary> */ -void mqc_bytein() -{ - if (mqc_bp != mqc_end) { - unsigned int c; - if (mqc_bp + 1 != mqc_end) { - c = *(mqc_bp + 1); - } else { - c = 0xff; - } - if (*mqc_bp == 0xff) { - if (c > 0x8f) { - mqc_c += 0xff00; - mqc_ct = 8; - } else { - mqc_bp++; - mqc_c += c << 9; - mqc_ct = 7; - } - } else { - mqc_bp++; - mqc_c += c << 8; - mqc_ct = 8; - } - } else { - mqc_c += 0xff00; - mqc_ct = 8; - } -} - -/* <summary> */ -/* Renormalize mqc_a and mqc_c while decoding. */ -/* </summary> */ -void mqc_renormd() -{ - do { - if (mqc_ct == 0) { - mqc_bytein(); - } - mqc_a <<= 1; - mqc_c <<= 1; - mqc_ct--; - } while (mqc_a < 0x8000); -} - -/* <summary> */ -/* Initialize decoder. */ -/* </summary> */ -void mqc_init_dec(unsigned char *bp, int len) -{ - mqc_setcurctx(0); - mqc_start = bp; - mqc_end = bp + len; - mqc_bp = bp; - mqc_c = *mqc_bp << 16; - mqc_bytein(); - mqc_c <<= 7; - mqc_ct -= 7; - mqc_a = 0x8000; -} - -/* <summary> */ -/* Decode a symbol. */ -/* </summary> */ -int mqc_decode() -{ - int d; - mqc_a -= (*mqc_curctx)->qeval; - if ((mqc_c >> 16) < (*mqc_curctx)->qeval) { - d = mqc_lpsexchange(); - mqc_renormd(); - } else { - mqc_c -= (*mqc_curctx)->qeval << 16; - if ((mqc_a & 0x8000) == 0) { - d = mqc_mpsexchange(); - mqc_renormd(); - } else { - d = (*mqc_curctx)->mps; - } - } - return d; -} - -/* <summary> */ -/* Reset states of all contexts. */ -/* </summary> */ -void mqc_resetstates() -{ - int i; - for (i = 0; i < MQC_NUMCTXS; i++) { - mqc_ctxs[i] = mqc_states; - } -} - -/* <summary> */ -/* Set the state for a context. */ -/* </summary> */ -/* <param name="ctxno">Context number</param> */ -/* <param name="msb">Most significant bit</param> */ -/* <param name="prob">Index to the probability of symbols</param> */ -void mqc_setstate(int ctxno, int msb, int prob) -{ - mqc_ctxs[ctxno] = &mqc_states[msb + (prob << 1)]; -} |