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-rw-r--r--core/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp30
-rw-r--r--core/fxcodec/jbig2/JBig2_HuffmanTable.cpp28
-rw-r--r--core/fxcodec/jbig2/JBig2_HuffmanTable.h7
3 files changed, 32 insertions, 33 deletions
diff --git a/core/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp b/core/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp
index c6dd3924b8..cdb6fbe752 100644
--- a/core/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp
+++ b/core/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp
@@ -25,20 +25,22 @@ int CJBig2_HuffmanDecoder::DecodeAValue(CJBig2_HuffmanTable* pTable,
nVal = (nVal << 1) | nTmp;
++nBits;
for (uint32_t i = 0; i < pTable->Size(); ++i) {
- if (pTable->GetPREFLEN()[i] == nBits && pTable->GetCODES()[i] == nVal) {
- if (pTable->IsHTOOB() && i == pTable->Size() - 1)
- return JBIG2_OOB;
-
- if (m_pStream->readNBits(pTable->GetRANGELEN()[i], &nTmp) == -1)
- return -1;
-
- uint32_t offset = pTable->IsHTOOB() ? 3 : 2;
- if (i == pTable->Size() - offset)
- *nResult = pTable->GetRANGELOW()[i] - nTmp;
- else
- *nResult = pTable->GetRANGELOW()[i] + nTmp;
- return 0;
- }
+ const JBig2HuffmanCode& code = pTable->GetCODES()[i];
+ if (code.codelen != nBits || code.code != nVal)
+ continue;
+
+ if (pTable->IsHTOOB() && i == pTable->Size() - 1)
+ return JBIG2_OOB;
+
+ if (m_pStream->readNBits(pTable->GetRANGELEN()[i], &nTmp) == -1)
+ return -1;
+
+ uint32_t offset = pTable->IsHTOOB() ? 3 : 2;
+ if (i == pTable->Size() - offset)
+ *nResult = pTable->GetRANGELOW()[i] - nTmp;
+ else
+ *nResult = pTable->GetRANGELOW()[i] + nTmp;
+ return 0;
}
}
return -1;
diff --git a/core/fxcodec/jbig2/JBig2_HuffmanTable.cpp b/core/fxcodec/jbig2/JBig2_HuffmanTable.cpp
index 5a49e1e4be..aa3cd0be10 100644
--- a/core/fxcodec/jbig2/JBig2_HuffmanTable.cpp
+++ b/core/fxcodec/jbig2/JBig2_HuffmanTable.cpp
@@ -11,7 +11,6 @@
#include <vector>
#include "core/fxcodec/jbig2/JBig2_BitStream.h"
-#include "core/fxcodec/jbig2/JBig2_Define.h"
#include "core/fxcodec/jbig2/JBig2_HuffmanTable_Standard.h"
#include "core/fxcrt/fx_memory.h"
#include "third_party/base/numerics/safe_math.h"
@@ -31,11 +30,11 @@ CJBig2_HuffmanTable::CJBig2_HuffmanTable(CJBig2_BitStream* pStream)
CJBig2_HuffmanTable::~CJBig2_HuffmanTable() {}
void CJBig2_HuffmanTable::ParseFromStandardTable(const JBig2TableLine* pTable) {
- PREFLEN.resize(NTEMP);
+ CODES.resize(NTEMP);
RANGELEN.resize(NTEMP);
RANGELOW.resize(NTEMP);
for (uint32_t i = 0; i < NTEMP; ++i) {
- PREFLEN[i] = pTable[i].PREFLEN;
+ CODES[i].codelen = pTable[i].PREFLEN;
RANGELEN[i] = pTable[i].RANDELEN;
RANGELOW[i] = pTable[i].RANGELOW;
}
@@ -65,7 +64,7 @@ bool CJBig2_HuffmanTable::ParseFromCodedBuffer(CJBig2_BitStream* pStream) {
ExtendBuffers(false);
pdfium::base::CheckedNumeric<int> cur_low = low;
do {
- if ((pStream->readNBits(HTPS, &PREFLEN[NTEMP]) == -1) ||
+ if ((pStream->readNBits(HTPS, &CODES[NTEMP].codelen) == -1) ||
(pStream->readNBits(HTRS, &RANGELEN[NTEMP]) == -1) ||
(static_cast<size_t>(RANGELEN[NTEMP]) >= 8 * sizeof(cur_low))) {
return false;
@@ -81,7 +80,7 @@ bool CJBig2_HuffmanTable::ParseFromCodedBuffer(CJBig2_BitStream* pStream) {
ExtendBuffers(true);
} while (cur_low.ValueOrDie() < high);
- if (pStream->readNBits(HTPS, &PREFLEN[NTEMP]) == -1)
+ if (pStream->readNBits(HTPS, &CODES[NTEMP].codelen) == -1)
return false;
RANGELEN[NTEMP] = 32;
@@ -91,7 +90,7 @@ bool CJBig2_HuffmanTable::ParseFromCodedBuffer(CJBig2_BitStream* pStream) {
RANGELOW[NTEMP] = low - 1;
ExtendBuffers(true);
- if (pStream->readNBits(HTPS, &PREFLEN[NTEMP]) == -1)
+ if (pStream->readNBits(HTPS, &CODES[NTEMP].codelen) == -1)
return false;
RANGELEN[NTEMP] = 32;
@@ -99,7 +98,7 @@ bool CJBig2_HuffmanTable::ParseFromCodedBuffer(CJBig2_BitStream* pStream) {
ExtendBuffers(true);
if (HTOOB) {
- if (pStream->readNBits(HTPS, &PREFLEN[NTEMP]) == -1)
+ if (pStream->readNBits(HTPS, &CODES[NTEMP].codelen) == -1)
return false;
++NTEMP;
@@ -111,13 +110,12 @@ bool CJBig2_HuffmanTable::ParseFromCodedBuffer(CJBig2_BitStream* pStream) {
bool CJBig2_HuffmanTable::InitCodes() {
int lenmax = 0;
for (uint32_t i = 0; i < NTEMP; ++i)
- lenmax = std::max(PREFLEN[i], lenmax);
+ lenmax = std::max(CODES[i].codelen, lenmax);
- CODES.resize(NTEMP);
std::vector<int> LENCOUNT(lenmax + 1);
std::vector<int> FIRSTCODE(lenmax + 1);
- for (int len : PREFLEN)
- ++LENCOUNT[len];
+ for (uint32_t i = 0; i < NTEMP; ++i)
+ ++LENCOUNT[CODES[i].codelen];
FIRSTCODE[0] = 0;
LENCOUNT[0] = 0;
@@ -131,8 +129,8 @@ bool CJBig2_HuffmanTable::InitCodes() {
FIRSTCODE[i] = shifted.ValueOrDie();
int CURCODE = FIRSTCODE[i];
for (uint32_t j = 0; j < NTEMP; ++j) {
- if (PREFLEN[j] == i)
- CODES[j] = CURCODE++;
+ if (CODES[j].codelen == i)
+ CODES[j].code = CURCODE++;
}
}
@@ -143,13 +141,13 @@ void CJBig2_HuffmanTable::ExtendBuffers(bool increment) {
if (increment)
++NTEMP;
- size_t size = PREFLEN.size();
+ size_t size = CODES.size();
if (NTEMP < size)
return;
size += 16;
ASSERT(NTEMP < size);
- PREFLEN.resize(size);
+ CODES.resize(size);
RANGELEN.resize(size);
RANGELOW.resize(size);
}
diff --git a/core/fxcodec/jbig2/JBig2_HuffmanTable.h b/core/fxcodec/jbig2/JBig2_HuffmanTable.h
index 4f75fba873..cdfb53f4fc 100644
--- a/core/fxcodec/jbig2/JBig2_HuffmanTable.h
+++ b/core/fxcodec/jbig2/JBig2_HuffmanTable.h
@@ -9,6 +9,7 @@
#include <vector>
+#include "core/fxcodec/jbig2/JBig2_Define.h"
#include "core/fxcrt/fx_system.h"
class CJBig2_BitStream;
@@ -24,8 +25,7 @@ class CJBig2_HuffmanTable {
bool IsHTOOB() const { return HTOOB; }
uint32_t Size() const { return NTEMP; }
- const std::vector<int>& GetCODES() const { return CODES; }
- const std::vector<int>& GetPREFLEN() const { return PREFLEN; }
+ const std::vector<JBig2HuffmanCode>& GetCODES() const { return CODES; }
const std::vector<int>& GetRANGELEN() const { return RANGELEN; }
const std::vector<int>& GetRANGELOW() const { return RANGELOW; }
bool IsOK() const { return m_bOK; }
@@ -39,8 +39,7 @@ class CJBig2_HuffmanTable {
bool m_bOK;
bool HTOOB;
uint32_t NTEMP;
- std::vector<int> CODES;
- std::vector<int> PREFLEN;
+ std::vector<JBig2HuffmanCode> CODES;
std::vector<int> RANGELEN;
std::vector<int> RANGELOW;
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 19:08:00 +0000