+++ /dev/null
-/*
- * The copyright in this software is being made available under the 2-clauses
- * BSD License, included below. This software may be subject to other third
- * party and contributor rights, including patent rights, and no such rights
- * are granted under this license.
- *
- * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
- * Copyright (c) 2002-2014, Professor Benoit Macq
- * Copyright (c) 2001-2003, David Janssens
- * Copyright (c) 2002-2003, Yannick Verschueren
- * Copyright (c) 2003-2007, Francois-Olivier Devaux
- * Copyright (c) 2003-2014, Antonin Descampe
- * Copyright (c) 2005, Herve Drolon, FreeImage Team
- * 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);
-/**
-FIXME: documentation ???
-@param mqc MQC handle
-@return
-*/
-static INLINE int mqc_mpsexchange(opj_mqc_t *const mqc);
-/**
-FIXME: documentation ???
-@param mqc MQC handle
-@return
-*/
-static INLINE int mqc_lpsexchange(opj_mqc_t *const mqc);
-/**
-Input a byte
-@param mqc MQC handle
-*/
-static INLINE void mqc_bytein(opj_mqc_t *const mqc);
-/**
-Renormalize mqc->a and mqc->c while decoding
-@param mqc MQC handle
-*/
-static INLINE void mqc_renormd(opj_mqc_t *const 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 INLINE int mqc_mpsexchange(opj_mqc_t *const 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 INLINE int mqc_lpsexchange(opj_mqc_t *const 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;
-}
-
-#ifdef MQC_PERF_OPT
-static INLINE void mqc_bytein(opj_mqc_t *const mqc)
-{
- unsigned int i = *((unsigned int *) mqc->bp);
- mqc->c += i & 0xffff00;
- mqc->ct = i & 0x0f;
- mqc->bp += (i >> 2) & 0x04;
-}
-#else
-static void mqc_bytein(opj_mqc_t *const 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;
- }
-}
-#endif
-
-static INLINE void mqc_renormd(opj_mqc_t *const 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(void)
-{
- opj_mqc_t *mqc = (opj_mqc_t*)opj_malloc(sizeof(opj_mqc_t));
-#ifdef MQC_PERF_OPT
- mqc->buffer = NULL;
-#endif
- return mqc;
-}
-
-void mqc_destroy(opj_mqc_t *mqc)
-{
- if (mqc) {
-#ifdef MQC_PERF_OPT
- if (mqc->buffer) {
- opj_free(mqc->buffer);
- }
-#endif
- 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_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, T1_CTXNO_UNI, 0, 46);
- mqc_setstate(mqc, T1_CTXNO_AGG, 0, 3);
- mqc_setstate(mqc, T1_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;
- }
-
-#ifdef MQC_PERF_OPT
- {
- unsigned int c;
- unsigned int *ip;
- unsigned char *end = mqc->end - 1;
- mqc->buffer = opj_realloc(mqc->buffer, (len + 1) * sizeof(unsigned int));
- ip = (unsigned int *) mqc->buffer;
-
- while (bp < end) {
- c = *(bp + 1);
- if (*bp == 0xff) {
- if (c > 0x8f) {
- break;
- } else {
- *ip = 0x00000017 | (c << 9);
- }
- } else {
- *ip = 0x00000018 | (c << 8);
- }
- bp++;
- ip++;
- }
-
- /* Handle last byte of data */
- c = 0xff;
- if (*bp == 0xff) {
- *ip = 0x0000ff18;
- } else {
- bp++;
- *ip = 0x00000018 | (c << 8);
- }
- ip++;
-
- *ip = 0x0000ff08;
- mqc->bp = mqc->buffer;
- }
-#endif
- mqc_bytein(mqc);
- mqc->c <<= 7;
- mqc->ct -= 7;
- mqc->a = 0x8000;
-}
-
-int mqc_decode(opj_mqc_t *const 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)];
-}
-
-
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