summaryrefslogtreecommitdiff
path: root/core/src/fxcodec/jbig2
diff options
context:
space:
mode:
Diffstat (limited to 'core/src/fxcodec/jbig2')
-rw-r--r--core/src/fxcodec/jbig2/JBig2_ArithDecoder.h2
-rw-r--r--core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp162
-rw-r--r--core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.h25
-rw-r--r--core/src/fxcodec/jbig2/JBig2_SddProc.cpp16
-rw-r--r--core/src/fxcodec/jbig2/JBig2_TrdProc.cpp42
5 files changed, 117 insertions, 130 deletions
diff --git a/core/src/fxcodec/jbig2/JBig2_ArithDecoder.h b/core/src/fxcodec/jbig2/JBig2_ArithDecoder.h
index a1e891065c..3cb95acd95 100644
--- a/core/src/fxcodec/jbig2/JBig2_ArithDecoder.h
+++ b/core/src/fxcodec/jbig2/JBig2_ArithDecoder.h
@@ -10,6 +10,8 @@
class CJBig2_BitStream;
struct JBig2ArithCtx {
+ JBig2ArithCtx() : MPS(0), I(0) {}
+
unsigned int MPS;
unsigned int I;
};
diff --git a/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp b/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp
index b194faf4ee..49be941355 100644
--- a/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp
@@ -6,100 +6,92 @@
#include "JBig2_ArithIntDecoder.h"
-#include "../../../include/fxcrt/fx_memory.h"
-#include "JBig2_Define.h"
+#include "../../../include/fxcrt/fx_basic.h"
+
+namespace {
+
+int ShiftOr(int val, int bitwise_or_val) {
+ return (val << 1) | bitwise_or_val;
+}
+
+const struct ArithIntDecodeData {
+ int nNeedBits;
+ int nValue;
+} g_ArithIntDecodeData[] = {
+ {2, 0},
+ {4, 4},
+ {6, 20},
+ {8, 84},
+ {12, 340},
+ {32, 4436},
+};
+
+size_t RecursiveDecode(CJBig2_ArithDecoder* decoder,
+ std::vector<JBig2ArithCtx>* context,
+ int* prev,
+ size_t depth) {
+ static const size_t kDepthEnd = FX_ArraySize(g_ArithIntDecodeData) - 1;
+ if (depth == kDepthEnd)
+ return kDepthEnd;
+
+ JBig2ArithCtx* pCX = &(*context)[*prev];
+ int D = decoder->DECODE(pCX);
+ *prev = ShiftOr(*prev, D);
+ if (!D)
+ return depth;
+ return RecursiveDecode(decoder, context, prev, depth + 1);
+}
+
+} // namespace
CJBig2_ArithIntDecoder::CJBig2_ArithIntDecoder() {
- IAx = FX_Alloc(JBig2ArithCtx, 512);
- JBIG2_memset(IAx, 0, sizeof(JBig2ArithCtx) * 512);
+ m_IAx.resize(512);
}
+
CJBig2_ArithIntDecoder::~CJBig2_ArithIntDecoder() {
- FX_Free(IAx);
}
-int CJBig2_ArithIntDecoder::decode(CJBig2_ArithDecoder* pArithDecoder,
- int* nResult) {
- int PREV, V;
- int S, D;
- int nNeedBits, nTemp, i;
- PREV = 1;
- S = pArithDecoder->DECODE(IAx + PREV);
- PREV = (PREV << 1) | S;
- D = pArithDecoder->DECODE(IAx + PREV);
- PREV = (PREV << 1) | D;
- if (D) {
- D = pArithDecoder->DECODE(IAx + PREV);
- PREV = (PREV << 1) | D;
- if (D) {
- D = pArithDecoder->DECODE(IAx + PREV);
- PREV = (PREV << 1) | D;
- if (D) {
- D = pArithDecoder->DECODE(IAx + PREV);
- PREV = (PREV << 1) | D;
- if (D) {
- D = pArithDecoder->DECODE(IAx + PREV);
- PREV = (PREV << 1) | D;
- if (D) {
- nNeedBits = 32;
- V = 4436;
- } else {
- nNeedBits = 12;
- V = 340;
- }
- } else {
- nNeedBits = 8;
- V = 84;
- }
- } else {
- nNeedBits = 6;
- V = 20;
- }
- } else {
- nNeedBits = 4;
- V = 4;
- }
- } else {
- nNeedBits = 2;
- V = 0;
- }
- nTemp = 0;
- for (i = 0; i < nNeedBits; i++) {
- D = pArithDecoder->DECODE(IAx + PREV);
- if (PREV < 256) {
- PREV = (PREV << 1) | D;
- } else {
- PREV = (((PREV << 1) | D) & 511) | 256;
- }
- nTemp = (nTemp << 1) | D;
- }
- V += nTemp;
- if (S == 1 && V > 0) {
- V = -V;
- }
- *nResult = V;
- if (S == 1 && V == 0) {
- return JBIG2_OOB;
+
+bool CJBig2_ArithIntDecoder::decode(CJBig2_ArithDecoder* pArithDecoder,
+ int* nResult) {
+ int PREV = 1;
+ const int S = pArithDecoder->DECODE(&m_IAx[PREV]);
+ PREV = ShiftOr(PREV, S);
+
+ const size_t nDecodeDataIndex =
+ RecursiveDecode(pArithDecoder, &m_IAx, &PREV, 0);
+
+ int nTemp = 0;
+ for (int i = 0; i < g_ArithIntDecodeData[nDecodeDataIndex].nNeedBits; ++i) {
+ int D = pArithDecoder->DECODE(&m_IAx[PREV]);
+ PREV = ShiftOr(PREV, D);
+ if (PREV >= 256)
+ PREV = (PREV & 511) | 256;
+ nTemp = ShiftOr(nTemp, D);
}
- return 0;
+ int nValue = g_ArithIntDecodeData[nDecodeDataIndex].nValue;
+ nValue += nTemp;
+ if (S == 1 && nValue > 0)
+ nValue = -nValue;
+
+ *nResult = nValue;
+ return S != 1 || nValue != 0;
}
-CJBig2_ArithIaidDecoder::CJBig2_ArithIaidDecoder(unsigned char SBSYMCODELENA) {
- SBSYMCODELEN = SBSYMCODELENA;
- IAID = FX_Alloc(JBig2ArithCtx, 1 << SBSYMCODELEN);
- JBIG2_memset(IAID, 0, sizeof(JBig2ArithCtx) * (int)(1 << SBSYMCODELEN));
+
+CJBig2_ArithIaidDecoder::CJBig2_ArithIaidDecoder(unsigned char SBSYMCODELENA)
+ : SBSYMCODELEN(SBSYMCODELENA) {
+ m_IAID.resize(1 << SBSYMCODELEN);
}
+
CJBig2_ArithIaidDecoder::~CJBig2_ArithIaidDecoder() {
- FX_Free(IAID);
}
-int CJBig2_ArithIaidDecoder::decode(CJBig2_ArithDecoder* pArithDecoder,
- int* nResult) {
- int PREV;
- int D;
- int i;
- PREV = 1;
- for (i = 0; i < SBSYMCODELEN; i++) {
- D = pArithDecoder->DECODE(IAID + PREV);
- PREV = (PREV << 1) | D;
+
+void CJBig2_ArithIaidDecoder::decode(CJBig2_ArithDecoder* pArithDecoder,
+ FX_DWORD* nResult) {
+ int PREV = 1;
+ for (unsigned char i = 0; i < SBSYMCODELEN; ++i) {
+ JBig2ArithCtx* pCX = &m_IAID[PREV];
+ int D = pArithDecoder->DECODE(pCX);
+ PREV = ShiftOr(PREV, D);
}
- PREV = PREV - (1 << SBSYMCODELEN);
- *nResult = PREV;
- return 0;
+ *nResult = PREV - (1 << SBSYMCODELEN);
}
diff --git a/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.h b/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.h
index ca8e181da7..f31636b77c 100644
--- a/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.h
+++ b/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.h
@@ -4,33 +4,36 @@
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-#ifndef _JBIG2_ARITH_INT_DECODER_H_
-#define _JBIG2_ARITH_INT_DECODER_H_
+#ifndef CORE_SRC_FXCODEC_JBIG2_JBIG2_ARITHINTDECODER_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_ARITHINTDECODER_H_
+#include <vector>
+
+#include "../../../include/fxcrt/fx_system.h"
#include "JBig2_ArithDecoder.h"
class CJBig2_ArithIntDecoder {
public:
CJBig2_ArithIntDecoder();
-
~CJBig2_ArithIntDecoder();
- int decode(CJBig2_ArithDecoder* pArithDecoder, int* nResult);
+ bool decode(CJBig2_ArithDecoder* pArithDecoder, int* nResult);
private:
- JBig2ArithCtx* IAx;
+ std::vector<JBig2ArithCtx> m_IAx;
};
+
class CJBig2_ArithIaidDecoder {
public:
- CJBig2_ArithIaidDecoder(unsigned char SBSYMCODELENA);
-
+ explicit CJBig2_ArithIaidDecoder(unsigned char SBSYMCODELENA);
~CJBig2_ArithIaidDecoder();
- int decode(CJBig2_ArithDecoder* pArithDecoder, int* nResult);
+ void decode(CJBig2_ArithDecoder* pArithDecoder, FX_DWORD* nResult);
private:
- JBig2ArithCtx* IAID;
+ std::vector<JBig2ArithCtx> m_IAID;
- unsigned char SBSYMCODELEN;
+ const unsigned char SBSYMCODELEN;
};
-#endif
+
+#endif // CORE_SRC_FXCODEC_JBIG2_JBIG2_ARITHINTDECODER_H_
diff --git a/core/src/fxcodec/jbig2/JBig2_SddProc.cpp b/core/src/fxcodec/jbig2/JBig2_SddProc.cpp
index ae5635b462..afce6eb330 100644
--- a/core/src/fxcodec/jbig2/JBig2_SddProc.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_SddProc.cpp
@@ -35,7 +35,6 @@ CJBig2_SymbolDict* CJBig2_SDDProc::decode_Arith(
FX_DWORD nTmp;
FX_DWORD SBNUMSYMS;
uint8_t SBSYMCODELEN;
- FX_DWORD IDI;
int32_t RDXI, RDYI;
CJBig2_Image** SBSYMS;
nonstd::unique_ptr<CJBig2_ArithIaidDecoder> IAID;
@@ -65,7 +64,7 @@ CJBig2_SymbolDict* CJBig2_SDDProc::decode_Arith(
NSYMSDECODED = 0;
while (NSYMSDECODED < SDNUMNEWSYMS) {
BS = nullptr;
- if (IADH->decode(pArithDecoder, &HCDH) == -1) {
+ if (!IADH->decode(pArithDecoder, &HCDH)) {
goto failed;
}
HCHEIGHT = HCHEIGHT + HCDH;
@@ -116,7 +115,7 @@ CJBig2_SymbolDict* CJBig2_SDDProc::decode_Arith(
goto failed;
}
} else {
- if (IAAI->decode(pArithDecoder, (int*)&REFAGGNINST) == -1) {
+ if (!IAAI->decode(pArithDecoder, (int*)&REFAGGNINST)) {
goto failed;
}
if (REFAGGNINST > 1) {
@@ -209,11 +208,10 @@ CJBig2_SymbolDict* CJBig2_SDDProc::decode_Arith(
FX_Free(SBSYMS);
} else if (REFAGGNINST == 1) {
SBNUMSYMS = SDNUMINSYMS + NSYMSDECODED;
- if (IAID->decode(pArithDecoder, (int*)&IDI) == -1) {
- goto failed;
- }
- if ((IARDX->decode(pArithDecoder, &RDXI) == -1) ||
- (IARDY->decode(pArithDecoder, &RDYI) == -1)) {
+ FX_DWORD IDI;
+ IAID->decode(pArithDecoder, &IDI);
+ if (!IARDX->decode(pArithDecoder, &RDXI) ||
+ !IARDY->decode(pArithDecoder, &RDYI)) {
goto failed;
}
if (IDI >= SBNUMSYMS) {
@@ -256,7 +254,7 @@ CJBig2_SymbolDict* CJBig2_SDDProc::decode_Arith(
CUREXFLAG = 0;
EXFLAGS = FX_Alloc(FX_BOOL, SDNUMINSYMS + SDNUMNEWSYMS);
while (EXINDEX < SDNUMINSYMS + SDNUMNEWSYMS) {
- if (IAEX->decode(pArithDecoder, (int*)&EXRUNLENGTH) == -1) {
+ if (!IAEX->decode(pArithDecoder, (int*)&EXRUNLENGTH)) {
FX_Free(EXFLAGS);
goto failed;
}
diff --git a/core/src/fxcodec/jbig2/JBig2_TrdProc.cpp b/core/src/fxcodec/jbig2/JBig2_TrdProc.cpp
index afa3dba920..f26bdb6706 100644
--- a/core/src/fxcodec/jbig2/JBig2_TrdProc.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_TrdProc.cpp
@@ -17,9 +17,7 @@ CJBig2_Image* CJBig2_TRDProc::decode_Huffman(CJBig2_BitStream* pStream,
int32_t STRIPT, FIRSTS;
FX_DWORD NINSTANCES;
int32_t DT, DFS, CURS;
- uint8_t CURT;
int32_t SI, TI;
- FX_DWORD IDI;
CJBig2_Image* IBI;
FX_DWORD WI, HI;
int32_t IDS;
@@ -66,9 +64,8 @@ CJBig2_Image* CJBig2_TRDProc::decode_Huffman(CJBig2_BitStream* pStream,
CURS = CURS + IDS + SBDSOFFSET;
}
}
- if (SBSTRIPS == 1) {
- CURT = 0;
- } else {
+ uint8_t CURT = 0;
+ if (SBSTRIPS != 1) {
nTmp = 1;
while ((FX_DWORD)(1 << nTmp) < SBSTRIPS) {
nTmp++;
@@ -81,6 +78,7 @@ CJBig2_Image* CJBig2_TRDProc::decode_Huffman(CJBig2_BitStream* pStream,
TI = STRIPT + CURT;
nVal = 0;
nBits = 0;
+ FX_DWORD IDI;
for (;;) {
if (pStream->read1Bit(&nTmp) != 0)
return nullptr;
@@ -219,9 +217,7 @@ CJBig2_Image* CJBig2_TRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
int32_t STRIPT, FIRSTS;
FX_DWORD NINSTANCES;
int32_t DT, DFS, CURS;
- int32_t CURT;
int32_t SI, TI;
- FX_DWORD IDI;
CJBig2_Image* IBI;
FX_DWORD WI, HI;
int32_t IDS;
@@ -230,7 +226,7 @@ CJBig2_Image* CJBig2_TRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
CJBig2_Image* IBOI;
FX_DWORD WOI, HOI;
FX_BOOL bFirst;
- int32_t nRet, nVal;
+ int32_t nRet;
int32_t bRetained;
CJBig2_ArithIntDecoder* IADT, *IAFS, *IADS, *IAIT, *IARI, *IARDW, *IARDH,
*IARDX, *IARDY;
@@ -262,7 +258,7 @@ CJBig2_Image* CJBig2_TRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
}
nonstd::unique_ptr<CJBig2_Image> SBREG(new CJBig2_Image(SBW, SBH));
SBREG->fill(SBDEFPIXEL);
- if (IADT->decode(pArithDecoder, &STRIPT) == -1) {
+ if (!IADT->decode(pArithDecoder, &STRIPT)) {
goto failed;
}
STRIPT *= SBSTRIPS;
@@ -270,7 +266,7 @@ CJBig2_Image* CJBig2_TRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
FIRSTS = 0;
NINSTANCES = 0;
while (NINSTANCES < SBNUMINSTANCES) {
- if (IADT->decode(pArithDecoder, &DT) == -1) {
+ if (!IADT->decode(pArithDecoder, &DT)) {
goto failed;
}
DT *= SBSTRIPS;
@@ -278,7 +274,7 @@ CJBig2_Image* CJBig2_TRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
bFirst = TRUE;
for (;;) {
if (bFirst) {
- if (IAFS->decode(pArithDecoder, &DFS) == -1) {
+ if (!IAFS->decode(pArithDecoder, &DFS)) {
goto failed;
}
FIRSTS = FIRSTS + DFS;
@@ -297,26 +293,22 @@ CJBig2_Image* CJBig2_TRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
if (NINSTANCES >= SBNUMINSTANCES) {
break;
}
- if (SBSTRIPS == 1) {
- CURT = 0;
- } else {
- if (IAIT->decode(pArithDecoder, &nVal) == -1) {
+ int CURT = 0;
+ if (SBSTRIPS != 1) {
+ if (!IAIT->decode(pArithDecoder, &CURT)) {
goto failed;
}
- CURT = nVal;
}
TI = STRIPT + CURT;
- if (IAID->decode(pArithDecoder, &nVal) == -1) {
- goto failed;
- }
- IDI = nVal;
+ FX_DWORD IDI;
+ IAID->decode(pArithDecoder, &IDI);
if (IDI >= SBNUMSYMS) {
goto failed;
}
if (SBREFINE == 0) {
RI = 0;
} else {
- if (IARI->decode(pArithDecoder, &RI) == -1) {
+ if (!IARI->decode(pArithDecoder, &RI)) {
goto failed;
}
}
@@ -326,10 +318,10 @@ CJBig2_Image* CJBig2_TRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
if (RI == 0) {
IBI = SBSYMS[IDI];
} else {
- if ((IARDW->decode(pArithDecoder, &RDWI) == -1) ||
- (IARDH->decode(pArithDecoder, &RDHI) == -1) ||
- (IARDX->decode(pArithDecoder, &RDXI) == -1) ||
- (IARDY->decode(pArithDecoder, &RDYI) == -1)) {
+ if (!IARDW->decode(pArithDecoder, &RDWI) ||
+ !IARDH->decode(pArithDecoder, &RDHI) ||
+ !IARDX->decode(pArithDecoder, &RDXI) ||
+ !IARDY->decode(pArithDecoder, &RDYI)) {
goto failed;
}
IBOI = SBSYMS[IDI];
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 03:38:58 +0000