diff options
| author | Mathieu Malaterre <mathieu.malaterre@gmail.com> | 2013-01-02 18:19:56 +0000 |
|---|---|---|
| committer | Mathieu Malaterre <mathieu.malaterre@gmail.com> | 2013-01-02 18:19:56 +0000 |
| commit | caaec3bb05b3ecaa4cf6bc8b59b7abd401faa42c (patch) | |
| tree | e4b284d41e0d68e7aca58ad6bce301cd261c84b1 /src/lib/openjp3d/mqc.c | |
| parent | df47fae2872d726e7d8ca7b2ef4df0fbcc25cffc (diff) | |
[trunk] JP3D: convert from DOS to UNIX eol
Diffstat (limited to 'src/lib/openjp3d/mqc.c')
| -rw-r--r-- | src/lib/openjp3d/mqc.c | 1096 |
1 files changed, 548 insertions, 548 deletions
diff --git a/src/lib/openjp3d/mqc.c b/src/lib/openjp3d/mqc.c index 12ac90d6..874b7340 100644 --- a/src/lib/openjp3d/mqc.c +++ b/src/lib/openjp3d/mqc.c @@ -1,548 +1,548 @@ -/*
- * Copyright (c) 2001-2003, David Janssens
- * Copyright (c) 2002-2003, Yannick Verschueren
- * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
- * Copyright (c) 2005, Herve Drolon, FreeImage Team
- * Copyright (c) 2002-2005, 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 "opj_includes.h"
-
-/** @defgroup MQC MQC - Implementation of an MQ-Coder */
-/*@{*/
-
-/** @name Local static functions */
-/*@{*/
-
-/**
-Output a byte, doing bit-stuffing if necessary.
-After a 0xff byte, the next byte must be smaller than 0x90.
-@param mqc MQC handle
-*/
-static void mqc_byteout(opj_mqc_t *mqc);
-/**
-Renormalize mqc->a and mqc->c while encoding, so that mqc->a stays between 0x8000 and 0x10000
-@param mqc MQC handle
-*/
-static void mqc_renorme(opj_mqc_t *mqc);
-/**
-Encode the most probable symbol
-@param mqc MQC handle
-*/
-static void mqc_codemps(opj_mqc_t *mqc);
-/**
-Encode the most least symbol
-@param mqc MQC handle
-*/
-static void mqc_codelps(opj_mqc_t *mqc);
-/**
-Fill mqc->c with 1's for flushing
-@param mqc MQC handle
-*/
-static void mqc_setbits(opj_mqc_t *mqc);
-/**
-Exchange MPS with LPS
-@param mqc MQC handle
-@return
-*/
-static int mqc_mpsexchange(opj_mqc_t *mqc);
-/**
-Exchange LPS with MPS
-@param mqc MQC handle
-@return
-*/
-static int mqc_lpsexchange(opj_mqc_t *mqc);
-/**
-Input a byte
-@param mqc MQC handle
-*/
-static void mqc_bytein(opj_mqc_t *mqc);
-/**
-Renormalize mqc->a and mqc->c while decoding
-@param mqc MQC handle
-*/
-static void mqc_renormd(opj_mqc_t *mqc);
-
-/*@}*/
-
-/*@}*/
-
-/* <summary> */
-/* This array defines all the possible states for a context. */
-/* </summary> */
-static opj_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]},
-};
-
-/*
-==========================================================
- local functions
-==========================================================
-*/
-
-static void mqc_byteout(opj_mqc_t *mqc) {
- 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;
- }
- }
- }
-}
-
-static void mqc_renorme(opj_mqc_t *mqc) {
- do {
- mqc->a <<= 1;
- mqc->c <<= 1;
- mqc->ct--;
- if (mqc->ct == 0) {
- mqc_byteout(mqc);
- }
- } while ((mqc->a & 0x8000) == 0);
-}
-
-static void mqc_codemps(opj_mqc_t *mqc) {
- 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(mqc);
- } else {
- mqc->c += (*mqc->curctx)->qeval;
- }
-}
-
-static void mqc_codelps(opj_mqc_t *mqc) {
- 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(mqc);
-}
-
-static void mqc_setbits(opj_mqc_t *mqc) {
- unsigned int tempc = mqc->c + mqc->a;
- mqc->c |= 0xffff;
- if (mqc->c >= tempc) {
- mqc->c -= 0x8000;
- }
-}
-
-static int mqc_mpsexchange(opj_mqc_t *mqc) {
- 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;
-}
-
-static int mqc_lpsexchange(opj_mqc_t *mqc) {
- 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;
-}
-
-static void mqc_bytein(opj_mqc_t *mqc) {
- 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;
- }
-}
-
-static void mqc_renormd(opj_mqc_t *mqc) {
- do {
- if (mqc->ct == 0) {
- mqc_bytein(mqc);
- }
- mqc->a <<= 1;
- mqc->c <<= 1;
- mqc->ct--;
- } while (mqc->a < 0x8000);
-}
-
-/*
-==========================================================
- MQ-Coder interface
-==========================================================
-*/
-
-opj_mqc_t* mqc_create() {
- opj_mqc_t *mqc = (opj_mqc_t*)opj_malloc(sizeof(opj_mqc_t));
- return mqc;
-}
-
-void mqc_destroy(opj_mqc_t *mqc) {
- if(mqc) {
- opj_free(mqc);
- }
-}
-
-int mqc_numbytes(opj_mqc_t *mqc) {
- return mqc->bp - mqc->start;
-}
-
-void mqc_init_enc(opj_mqc_t *mqc, unsigned char *bp) {
- mqc_setcurctx(mqc, 0);
- mqc->a = 0x8000;
- mqc->c = 0;
- mqc->bp = bp - 1;
- mqc->ct = 12;
- if (*mqc->bp == 0xff) {
- mqc->ct = 13;
- }
- mqc->start = bp;
-}
-
-void mqc_setcurctx(opj_mqc_t *mqc, int ctxno) {
- mqc->curctx = &mqc->ctxs[ctxno];
-}
-
-void mqc_encode(opj_mqc_t *mqc, int d) {
- if ((*mqc->curctx)->mps == d) {
- mqc_codemps(mqc);
- } else {
- mqc_codelps(mqc);
- }
-}
-
-void mqc_flush(opj_mqc_t *mqc) {
- mqc_setbits(mqc);
- mqc->c <<= mqc->ct;
- mqc_byteout(mqc);
- mqc->c <<= mqc->ct;
- mqc_byteout(mqc);
-
- if (*mqc->bp != 0xff) {
- mqc->bp++;
- }
-}
-
-void mqc_bypass_init_enc(opj_mqc_t *mqc) {
- mqc->c = 0;
- mqc->ct = 8;
- /*if (*mqc->bp == 0xff) {
- mqc->ct = 7;
- } */
-}
-
-void mqc_bypass_enc(opj_mqc_t *mqc, 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;
- }
-}
-
-int mqc_bypass_flush_enc(opj_mqc_t *mqc) {
- 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;
-}
-
-void mqc_reset_enc(opj_mqc_t *mqc) {
- mqc_resetstates(mqc);
- mqc_setstate(mqc, 18, 0, 46);
- mqc_setstate(mqc, 0, 0, 3);
- mqc_setstate(mqc, 1, 0, 4);
-}
-
-void mqc_reset_enc_3(opj_mqc_t *mqc) {
- mqc_resetstates(mqc);
- mqc_setstate(mqc, T1_3D_CTXNO_UNI, 0, 46);
- mqc_setstate(mqc, T1_3D_CTXNO_AGG, 0, 3);
- mqc_setstate(mqc, T1_3D_CTXNO_ZC, 0, 4);
-}
-
-int mqc_restart_enc(opj_mqc_t *mqc) {
- int correction = 1;
-
- /* <flush part> */
- int n = 27 - 15 - mqc->ct;
- mqc->c <<= mqc->ct;
- while (n > 0) {
- mqc_byteout(mqc);
- n -= mqc->ct;
- mqc->c <<= mqc->ct;
- }
- mqc_byteout(mqc);
-
- return correction;
-}
-
-void mqc_restart_init_enc(opj_mqc_t *mqc) {
- /* <Re-init part> */
- mqc_setcurctx(mqc, 0);
- mqc->a = 0x8000;
- mqc->c = 0;
- mqc->ct = 12;
- mqc->bp--;
- if (*mqc->bp == 0xff) {
- mqc->ct = 13;
- }
-}
-
-void mqc_erterm_enc(opj_mqc_t *mqc) {
- int k = 11 - mqc->ct + 1;
-
- while (k > 0) {
- mqc->c <<= mqc->ct;
- mqc->ct = 0;
- mqc_byteout(mqc);
- k -= mqc->ct;
- }
-
- if (*mqc->bp != 0xff) {
- mqc_byteout(mqc);
- }
-}
-
-void mqc_segmark_enc(opj_mqc_t *mqc) {
- int i;
- mqc_setcurctx(mqc, 18);
-
- for (i = 1; i < 5; i++) {
- mqc_encode(mqc, i % 2);
- }
-}
-
-void mqc_init_dec(opj_mqc_t *mqc, unsigned char *bp, int len) {
- mqc_setcurctx(mqc, 0);
- mqc->start = bp;
- mqc->end = bp + len;
- mqc->bp = bp;
- if (len==0) mqc->c = 0xff << 16;
- else mqc->c = *mqc->bp << 16;
- mqc_bytein(mqc);
- mqc->c <<= 7;
- mqc->ct -= 7;
- mqc->a = 0x8000;
-}
-
-int mqc_decode(opj_mqc_t *mqc) {
- int d;
- mqc->a -= (*mqc->curctx)->qeval;
- if ((mqc->c >> 16) < (*mqc->curctx)->qeval) {
- d = mqc_lpsexchange(mqc);
- mqc_renormd(mqc);
- } else {
- mqc->c -= (*mqc->curctx)->qeval << 16;
- if ((mqc->a & 0x8000) == 0) {
- d = mqc_mpsexchange(mqc);
- mqc_renormd(mqc);
- } else {
- d = (*mqc->curctx)->mps;
- }
- }
-
- return d;
-}
-
-void mqc_resetstates(opj_mqc_t *mqc) {
- int i;
- for (i = 0; i < MQC_NUMCTXS; i++) {
- mqc->ctxs[i] = mqc_states;
- }
-}
-
-void mqc_setstate(opj_mqc_t *mqc, int ctxno, int msb, int prob) {
- mqc->ctxs[ctxno] = &mqc_states[msb + (prob << 1)];
-}
-
-
+/* + * Copyright (c) 2001-2003, David Janssens + * Copyright (c) 2002-2003, Yannick Verschueren + * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe + * Copyright (c) 2005, Herve Drolon, FreeImage Team + * Copyright (c) 2002-2005, 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 "opj_includes.h" + +/** @defgroup MQC MQC - Implementation of an MQ-Coder */ +/*@{*/ + +/** @name Local static functions */ +/*@{*/ + +/** +Output a byte, doing bit-stuffing if necessary. +After a 0xff byte, the next byte must be smaller than 0x90. +@param mqc MQC handle +*/ +static void mqc_byteout(opj_mqc_t *mqc); +/** +Renormalize mqc->a and mqc->c while encoding, so that mqc->a stays between 0x8000 and 0x10000 +@param mqc MQC handle +*/ +static void mqc_renorme(opj_mqc_t *mqc); +/** +Encode the most probable symbol +@param mqc MQC handle +*/ +static void mqc_codemps(opj_mqc_t *mqc); +/** +Encode the most least symbol +@param mqc MQC handle +*/ +static void mqc_codelps(opj_mqc_t *mqc); +/** +Fill mqc->c with 1's for flushing +@param mqc MQC handle +*/ +static void mqc_setbits(opj_mqc_t *mqc); +/** +Exchange MPS with LPS +@param mqc MQC handle +@return +*/ +static int mqc_mpsexchange(opj_mqc_t *mqc); +/** +Exchange LPS with MPS +@param mqc MQC handle +@return +*/ +static int mqc_lpsexchange(opj_mqc_t *mqc); +/** +Input a byte +@param mqc MQC handle +*/ +static void mqc_bytein(opj_mqc_t *mqc); +/** +Renormalize mqc->a and mqc->c while decoding +@param mqc MQC handle +*/ +static void mqc_renormd(opj_mqc_t *mqc); + +/*@}*/ + +/*@}*/ + +/* <summary> */ +/* This array defines all the possible states for a context. */ +/* </summary> */ +static opj_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]}, +}; + +/* +========================================================== + local functions +========================================================== +*/ + +static void mqc_byteout(opj_mqc_t *mqc) { + 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; + } + } + } +} + +static void mqc_renorme(opj_mqc_t *mqc) { + do { + mqc->a <<= 1; + mqc->c <<= 1; + mqc->ct--; + if (mqc->ct == 0) { + mqc_byteout(mqc); + } + } while ((mqc->a & 0x8000) == 0); +} + +static void mqc_codemps(opj_mqc_t *mqc) { + 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(mqc); + } else { + mqc->c += (*mqc->curctx)->qeval; + } +} + +static void mqc_codelps(opj_mqc_t *mqc) { + 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(mqc); +} + +static void mqc_setbits(opj_mqc_t *mqc) { + unsigned int tempc = mqc->c + mqc->a; + mqc->c |= 0xffff; + if (mqc->c >= tempc) { + mqc->c -= 0x8000; + } +} + +static int mqc_mpsexchange(opj_mqc_t *mqc) { + 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; +} + +static int mqc_lpsexchange(opj_mqc_t *mqc) { + 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; +} + +static void mqc_bytein(opj_mqc_t *mqc) { + 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; + } +} + +static void mqc_renormd(opj_mqc_t *mqc) { + do { + if (mqc->ct == 0) { + mqc_bytein(mqc); + } + mqc->a <<= 1; + mqc->c <<= 1; + mqc->ct--; + } while (mqc->a < 0x8000); +} + +/* +========================================================== + MQ-Coder interface +========================================================== +*/ + +opj_mqc_t* mqc_create() { + opj_mqc_t *mqc = (opj_mqc_t*)opj_malloc(sizeof(opj_mqc_t)); + return mqc; +} + +void mqc_destroy(opj_mqc_t *mqc) { + if(mqc) { + opj_free(mqc); + } +} + +int mqc_numbytes(opj_mqc_t *mqc) { + return mqc->bp - mqc->start; +} + +void mqc_init_enc(opj_mqc_t *mqc, unsigned char *bp) { + mqc_setcurctx(mqc, 0); + mqc->a = 0x8000; + mqc->c = 0; + mqc->bp = bp - 1; + mqc->ct = 12; + if (*mqc->bp == 0xff) { + mqc->ct = 13; + } + mqc->start = bp; +} + +void mqc_setcurctx(opj_mqc_t *mqc, int ctxno) { + mqc->curctx = &mqc->ctxs[ctxno]; +} + +void mqc_encode(opj_mqc_t *mqc, int d) { + if ((*mqc->curctx)->mps == d) { + mqc_codemps(mqc); + } else { + mqc_codelps(mqc); + } +} + +void mqc_flush(opj_mqc_t *mqc) { + mqc_setbits(mqc); + mqc->c <<= mqc->ct; + mqc_byteout(mqc); + mqc->c <<= mqc->ct; + mqc_byteout(mqc); + + if (*mqc->bp != 0xff) { + mqc->bp++; + } +} + +void mqc_bypass_init_enc(opj_mqc_t *mqc) { + mqc->c = 0; + mqc->ct = 8; + /*if (*mqc->bp == 0xff) { + mqc->ct = 7; + } */ +} + +void mqc_bypass_enc(opj_mqc_t *mqc, 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; + } +} + +int mqc_bypass_flush_enc(opj_mqc_t *mqc) { + 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; +} + +void mqc_reset_enc(opj_mqc_t *mqc) { + mqc_resetstates(mqc); + mqc_setstate(mqc, 18, 0, 46); + mqc_setstate(mqc, 0, 0, 3); + mqc_setstate(mqc, 1, 0, 4); +} + +void mqc_reset_enc_3(opj_mqc_t *mqc) { + mqc_resetstates(mqc); + mqc_setstate(mqc, T1_3D_CTXNO_UNI, 0, 46); + mqc_setstate(mqc, T1_3D_CTXNO_AGG, 0, 3); + mqc_setstate(mqc, T1_3D_CTXNO_ZC, 0, 4); +} + +int mqc_restart_enc(opj_mqc_t *mqc) { + int correction = 1; + + /* <flush part> */ + int n = 27 - 15 - mqc->ct; + mqc->c <<= mqc->ct; + while (n > 0) { + mqc_byteout(mqc); + n -= mqc->ct; + mqc->c <<= mqc->ct; + } + mqc_byteout(mqc); + + return correction; +} + +void mqc_restart_init_enc(opj_mqc_t *mqc) { + /* <Re-init part> */ + mqc_setcurctx(mqc, 0); + mqc->a = 0x8000; + mqc->c = 0; + mqc->ct = 12; + mqc->bp--; + if (*mqc->bp == 0xff) { + mqc->ct = 13; + } +} + +void mqc_erterm_enc(opj_mqc_t *mqc) { + int k = 11 - mqc->ct + 1; + + while (k > 0) { + mqc->c <<= mqc->ct; + mqc->ct = 0; + mqc_byteout(mqc); + k -= mqc->ct; + } + + if (*mqc->bp != 0xff) { + mqc_byteout(mqc); + } +} + +void mqc_segmark_enc(opj_mqc_t *mqc) { + int i; + mqc_setcurctx(mqc, 18); + + for (i = 1; i < 5; i++) { + mqc_encode(mqc, i % 2); + } +} + +void mqc_init_dec(opj_mqc_t *mqc, unsigned char *bp, int len) { + mqc_setcurctx(mqc, 0); + mqc->start = bp; + mqc->end = bp + len; + mqc->bp = bp; + if (len==0) mqc->c = 0xff << 16; + else mqc->c = *mqc->bp << 16; + mqc_bytein(mqc); + mqc->c <<= 7; + mqc->ct -= 7; + mqc->a = 0x8000; +} + +int mqc_decode(opj_mqc_t *mqc) { + int d; + mqc->a -= (*mqc->curctx)->qeval; + if ((mqc->c >> 16) < (*mqc->curctx)->qeval) { + d = mqc_lpsexchange(mqc); + mqc_renormd(mqc); + } else { + mqc->c -= (*mqc->curctx)->qeval << 16; + if ((mqc->a & 0x8000) == 0) { + d = mqc_mpsexchange(mqc); + mqc_renormd(mqc); + } else { + d = (*mqc->curctx)->mps; + } + } + + return d; +} + +void mqc_resetstates(opj_mqc_t *mqc) { + int i; + for (i = 0; i < MQC_NUMCTXS; i++) { + mqc->ctxs[i] = mqc_states; + } +} + +void mqc_setstate(opj_mqc_t *mqc, int ctxno, int msb, int prob) { + mqc->ctxs[ctxno] = &mqc_states[msb + (prob << 1)]; +} + + |
