diff options
Diffstat (limited to 'core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp')
| -rw-r--r-- | core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp b/core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp new file mode 100644 index 0000000000..af4a54988d --- /dev/null +++ b/core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp @@ -0,0 +1,193 @@ +// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "JBig2_HuffmanTable.h"
+#include "JBig2_BitStream.h"
+#include <string.h>
+
+CJBig2_HuffmanTable::CJBig2_HuffmanTable(const JBig2TableLine *pTable, int nLines,
+ FX_BOOL bHTOOB)
+{
+ init();
+ m_bOK = parseFromStandardTable(pTable, nLines, bHTOOB);
+}
+
+CJBig2_HuffmanTable::CJBig2_HuffmanTable(CJBig2_BitStream *pStream)
+{
+ init();
+ m_bOK = parseFromCodedBuffer(pStream);
+}
+
+CJBig2_HuffmanTable::~CJBig2_HuffmanTable()
+{
+ if(CODES) {
+ m_pModule->JBig2_Free(CODES);
+ }
+ if(PREFLEN) {
+ m_pModule->JBig2_Free(PREFLEN);
+ }
+ if(RANGELEN) {
+ m_pModule->JBig2_Free(RANGELEN);
+ }
+ if(RANGELOW) {
+ m_pModule->JBig2_Free(RANGELOW);
+ }
+}
+void CJBig2_HuffmanTable::init()
+{
+ HTOOB = FALSE;
+ NTEMP = 0;
+ CODES = NULL;
+ PREFLEN = NULL;
+ RANGELEN = NULL;
+ RANGELOW = NULL;
+}
+int CJBig2_HuffmanTable::parseFromStandardTable(const JBig2TableLine *pTable, int nLines, FX_BOOL bHTOOB)
+{
+ int CURLEN, LENMAX, CURCODE, CURTEMP, i;
+ int *LENCOUNT;
+ int *FIRSTCODE;
+ HTOOB = bHTOOB;
+ NTEMP = nLines;
+ CODES = (int*)m_pModule->JBig2_Malloc2(sizeof(int), NTEMP);
+ PREFLEN = (int*)m_pModule->JBig2_Malloc2(sizeof(int), NTEMP);
+ RANGELEN = (int*)m_pModule->JBig2_Malloc2(sizeof(int), NTEMP);
+ RANGELOW = (int*)m_pModule->JBig2_Malloc2(sizeof(int), NTEMP);
+ LENMAX = 0;
+ for(i = 0; i < NTEMP; i++) {
+ PREFLEN[i] = pTable[i].PREFLEN;
+ RANGELEN[i] = pTable[i].RANDELEN;
+ RANGELOW[i] = pTable[i].RANGELOW;
+ if(PREFLEN[i] > LENMAX) {
+ LENMAX = PREFLEN[i];
+ }
+ }
+ LENCOUNT = (int*)m_pModule->JBig2_Malloc2(sizeof(int), (LENMAX + 1));
+ JBIG2_memset(LENCOUNT, 0, sizeof(int) * (LENMAX + 1));
+ FIRSTCODE = (int*)m_pModule->JBig2_Malloc2(sizeof(int), (LENMAX + 1));
+ for(i = 0; i < NTEMP; i++) {
+ LENCOUNT[PREFLEN[i]] ++;
+ }
+ CURLEN = 1;
+ FIRSTCODE[0] = 0;
+ LENCOUNT[0] = 0;
+ while(CURLEN <= LENMAX) {
+ FIRSTCODE[CURLEN] = (FIRSTCODE[CURLEN - 1] + LENCOUNT[CURLEN - 1]) << 1;
+ CURCODE = FIRSTCODE[CURLEN];
+ CURTEMP = 0;
+ while(CURTEMP < NTEMP) {
+ if(PREFLEN[CURTEMP] == CURLEN) {
+ CODES[CURTEMP] = CURCODE;
+ CURCODE = CURCODE + 1;
+ }
+ CURTEMP = CURTEMP + 1;
+ }
+ CURLEN = CURLEN + 1;
+ }
+ m_pModule->JBig2_Free(LENCOUNT);
+ m_pModule->JBig2_Free(FIRSTCODE);
+ return 1;
+}
+
+#define HT_CHECK_MEMORY_ADJUST \
+ if(NTEMP >= nSize) \
+ { \
+ nSize += 16; \
+ PREFLEN = (int*)m_pModule->JBig2_Realloc(PREFLEN,sizeof(int)*nSize); \
+ RANGELEN = (int*)m_pModule->JBig2_Realloc(RANGELEN,sizeof(int)*nSize); \
+ RANGELOW = (int*)m_pModule->JBig2_Realloc(RANGELOW,sizeof(int)*nSize); \
+ }
+int CJBig2_HuffmanTable::parseFromCodedBuffer(CJBig2_BitStream *pStream)
+{
+ unsigned char HTPS, HTRS;
+ int HTLOW, HTHIGH;
+ int CURRANGELOW;
+ int nSize = 16;
+ int CURLEN, LENMAX, CURCODE, CURTEMP, i;
+ int *LENCOUNT;
+ int *FIRSTCODE;
+ unsigned char cTemp;
+ if(pStream->read1Byte(&cTemp) == -1) {
+ goto failed;
+ }
+ HTOOB = cTemp & 0x01;
+ HTPS = ((cTemp >> 1) & 0x07) + 1;
+ HTRS = ((cTemp >> 4) & 0x07) + 1;
+ if(pStream->readInteger((FX_DWORD*)&HTLOW) == -1 ||
+ pStream->readInteger((FX_DWORD*)&HTHIGH) == -1) {
+ goto failed;
+ }
+ PREFLEN = (int*)m_pModule->JBig2_Malloc2(sizeof(int), nSize);
+ RANGELEN = (int*)m_pModule->JBig2_Malloc2(sizeof(int), nSize);
+ RANGELOW = (int*)m_pModule->JBig2_Malloc2(sizeof(int), nSize);
+ CURRANGELOW = HTLOW;
+ NTEMP = 0;
+ do {
+ HT_CHECK_MEMORY_ADJUST
+ if((pStream->readNBits(HTPS, &PREFLEN[NTEMP]) == -1)
+ || (pStream->readNBits(HTRS, &RANGELEN[NTEMP]) == -1)) {
+ goto failed;
+ }
+ RANGELOW[NTEMP] = CURRANGELOW;
+ CURRANGELOW = CURRANGELOW + (1 << RANGELEN[NTEMP]);
+ NTEMP = NTEMP + 1;
+ } while(CURRANGELOW < HTHIGH);
+ HT_CHECK_MEMORY_ADJUST
+ if(pStream->readNBits(HTPS, &PREFLEN[NTEMP]) == -1) {
+ goto failed;
+ }
+ RANGELEN[NTEMP] = 32;
+ RANGELOW[NTEMP] = HTLOW - 1;
+ NTEMP = NTEMP + 1;
+ HT_CHECK_MEMORY_ADJUST
+ if(pStream->readNBits(HTPS, &PREFLEN[NTEMP]) == -1) {
+ goto failed;
+ }
+ RANGELEN[NTEMP] = 32;
+ RANGELOW[NTEMP] = HTHIGH;
+ NTEMP = NTEMP + 1;
+ if(HTOOB) {
+ HT_CHECK_MEMORY_ADJUST
+ if(pStream->readNBits(HTPS, &PREFLEN[NTEMP]) == -1) {
+ goto failed;
+ }
+ NTEMP = NTEMP + 1;
+ }
+ CODES = (int*)m_pModule->JBig2_Malloc2(sizeof(int), NTEMP);
+ LENMAX = 0;
+ for(i = 0; i < NTEMP; i++) {
+ if(PREFLEN[i] > LENMAX) {
+ LENMAX = PREFLEN[i];
+ }
+ }
+ LENCOUNT = (int*)m_pModule->JBig2_Malloc2(sizeof(int), (LENMAX + 1));
+ JBIG2_memset(LENCOUNT, 0, sizeof(int) * (LENMAX + 1));
+ FIRSTCODE = (int*)m_pModule->JBig2_Malloc2(sizeof(int), (LENMAX + 1));
+ for(i = 0; i < NTEMP; i++) {
+ LENCOUNT[PREFLEN[i]] ++;
+ }
+ CURLEN = 1;
+ FIRSTCODE[0] = 0;
+ LENCOUNT[0] = 0;
+ while(CURLEN <= LENMAX) {
+ FIRSTCODE[CURLEN] = (FIRSTCODE[CURLEN - 1] + LENCOUNT[CURLEN - 1]) << 1;
+ CURCODE = FIRSTCODE[CURLEN];
+ CURTEMP = 0;
+ while(CURTEMP < NTEMP) {
+ if(PREFLEN[CURTEMP] == CURLEN) {
+ CODES[CURTEMP] = CURCODE;
+ CURCODE = CURCODE + 1;
+ }
+ CURTEMP = CURTEMP + 1;
+ }
+ CURLEN = CURLEN + 1;
+ }
+ m_pModule->JBig2_Free(LENCOUNT);
+ m_pModule->JBig2_Free(FIRSTCODE);
+ return TRUE;
+failed:
+ return FALSE;
+}
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