summaryrefslogtreecommitdiff
path: root/core/fxcodec
diff options
context:
space:
mode:
Diffstat (limited to 'core/fxcodec')
-rw-r--r--core/fxcodec/jbig2/JBig2_GrdProc.cpp288
-rw-r--r--core/fxcodec/jbig2/JBig2_GrdProc.h11
2 files changed, 59 insertions, 240 deletions
diff --git a/core/fxcodec/jbig2/JBig2_GrdProc.cpp b/core/fxcodec/jbig2/JBig2_GrdProc.cpp
index 054bfc5c15..421cdddb79 100644
--- a/core/fxcodec/jbig2/JBig2_GrdProc.cpp
+++ b/core/fxcodec/jbig2/JBig2_GrdProc.cpp
@@ -17,6 +17,20 @@
#include "core/fxcrt/pauseindicator_iface.h"
#include "third_party/base/ptr_util.h"
+namespace {
+
+// TODO(npm): Name this constants better or merge some together.
+constexpr int kOptConstant1[] = {0x9b25, 0x0795, 0x00e5};
+constexpr int kOptConstant2[] = {6, 4, 1};
+constexpr int kOptConstant3[] = {0xf800, 0x1e00, 0x0380};
+constexpr int kOptConstant4[] = {0, 1, 3};
+constexpr int kOptConstant5[] = {0x07f0, 0x01f8, 0x007c};
+constexpr int kOptConstant6[] = {0x7bf7, 0x0efb, 0x01bd};
+constexpr int kOptConstant7[] = {0x0800, 0x0200, 0x0080};
+constexpr int kOptConstant8[] = {0x0010, 0x0008, 0x0004};
+
+} // namespace
+
CJBig2_GRDProc::CJBig2_GRDProc() {}
CJBig2_GRDProc::~CJBig2_GRDProc() {}
@@ -41,33 +55,30 @@ std::unique_ptr<CJBig2_Image> CJBig2_GRDProc::DecodeArith(
if (!CJBig2_Image::IsValidImageSize(GBW, GBH))
return pdfium::MakeUnique<CJBig2_Image>(GBW, GBH);
- using DecodeFunction = std::function<std::unique_ptr<CJBig2_Image>(
- CJBig2_GRDProc&, CJBig2_ArithDecoder*, JBig2ArithCtx*)>;
- DecodeFunction func;
switch (GBTEMPLATE) {
case 0:
- func = UseTemplate0Opt3() ? &CJBig2_GRDProc::DecodeArithTemplate0Opt3
- : &CJBig2_GRDProc::DecodeArithTemplate0Unopt;
- break;
+ return UseTemplate0Opt3()
+ ? DecodeArithOpt3(pArithDecoder, gbContext, 0)
+ : DecodeArithTemplate0Unopt(pArithDecoder, gbContext);
case 1:
- func = UseTemplate1Opt3() ? &CJBig2_GRDProc::DecodeArithTemplate1Opt3
- : &CJBig2_GRDProc::DecodeArithTemplate1Unopt;
- break;
+ return UseTemplate1Opt3()
+ ? DecodeArithOpt3(pArithDecoder, gbContext, 1)
+ : DecodeArithTemplate1Unopt(pArithDecoder, gbContext);
case 2:
- func = UseTemplate23Opt3() ? &CJBig2_GRDProc::DecodeArithTemplate2Opt3
- : &CJBig2_GRDProc::DecodeArithTemplate2Unopt;
- break;
+ return UseTemplate23Opt3()
+ ? DecodeArithOpt3(pArithDecoder, gbContext, 2)
+ : DecodeArithTemplate2Unopt(pArithDecoder, gbContext);
default:
- func = UseTemplate23Opt3() ? &CJBig2_GRDProc::DecodeArithTemplate3Opt3
- : &CJBig2_GRDProc::DecodeArithTemplate3Unopt;
- break;
+ return UseTemplate23Opt3()
+ ? DecodeArithTemplate3Opt3(pArithDecoder, gbContext)
+ : DecodeArithTemplate3Unopt(pArithDecoder, gbContext);
}
- return func(*this, pArithDecoder, gbContext);
}
-std::unique_ptr<CJBig2_Image> CJBig2_GRDProc::DecodeArithTemplate0Opt3(
+std::unique_ptr<CJBig2_Image> CJBig2_GRDProc::DecodeArithOpt3(
CJBig2_ArithDecoder* pArithDecoder,
- JBig2ArithCtx* gbContext) {
+ JBig2ArithCtx* gbContext,
+ int OPT) {
auto GBREG = pdfium::MakeUnique<CJBig2_Image>(GBW, GBH);
if (!GBREG->data())
return nullptr;
@@ -78,13 +89,14 @@ std::unique_ptr<CJBig2_Image> CJBig2_GRDProc::DecodeArithTemplate0Opt3(
int32_t nStride2 = nStride << 1;
int32_t nLineBytes = ((GBW + 7) >> 3) - 1;
int32_t nBitsLeft = GBW - (nLineBytes << 3);
- uint32_t height = GBH & 0x7fffffff;
- for (uint32_t h = 0; h < height; h++) {
+ // TODO(npm): Why is the height only trimmed when OPT is 0?
+ uint32_t height = OPT == 0 ? GBH & 0x7fffffff : GBH;
+ for (uint32_t h = 0; h < height; ++h) {
if (TPGDON) {
if (pArithDecoder->IsComplete())
return nullptr;
- LTP = LTP ^ pArithDecoder->Decode(&gbContext[0x9b25]);
+ LTP = LTP ^ pArithDecoder->Decode(&gbContext[kOptConstant1[OPT]]);
}
if (LTP) {
GBREG->CopyLine(h, h - 1);
@@ -92,68 +104,74 @@ std::unique_ptr<CJBig2_Image> CJBig2_GRDProc::DecodeArithTemplate0Opt3(
if (h > 1) {
uint8_t* pLine1 = pLine - nStride2;
uint8_t* pLine2 = pLine - nStride;
- uint32_t line1 = (*pLine1++) << 6;
+ uint32_t line1 = (*pLine1++) << kOptConstant2[OPT];
uint32_t line2 = *pLine2++;
- uint32_t CONTEXT = ((line1 & 0xf800) | (line2 & 0x07f0));
- for (int32_t cc = 0; cc < nLineBytes; cc++) {
- line1 = (line1 << 8) | ((*pLine1++) << 6);
+ uint32_t CONTEXT = (line1 & kOptConstant3[OPT]) |
+ ((line2 >> kOptConstant4[OPT]) & kOptConstant5[OPT]);
+ for (int32_t cc = 0; cc < nLineBytes; ++cc) {
+ line1 = (line1 << 8) | ((*pLine1++) << kOptConstant2[OPT]);
line2 = (line2 << 8) | (*pLine2++);
uint8_t cVal = 0;
- for (int32_t k = 7; k >= 0; k--) {
+ for (int32_t k = 7; k >= 0; --k) {
if (pArithDecoder->IsComplete())
return nullptr;
int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
cVal |= bVal << k;
- CONTEXT = (((CONTEXT & 0x7bf7) << 1) | bVal |
- ((line1 >> k) & 0x0800) | ((line2 >> k) & 0x0010));
+ CONTEXT =
+ (((CONTEXT & kOptConstant6[OPT]) << 1) | bVal |
+ ((line1 >> k) & kOptConstant7[OPT]) |
+ ((line2 >> (k + kOptConstant4[OPT])) & kOptConstant8[OPT]));
}
pLine[cc] = cVal;
}
line1 <<= 8;
line2 <<= 8;
uint8_t cVal1 = 0;
- for (int32_t k = 0; k < nBitsLeft; k++) {
+ for (int32_t k = 0; k < nBitsLeft; ++k) {
if (pArithDecoder->IsComplete())
return nullptr;
int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
cVal1 |= bVal << (7 - k);
CONTEXT =
- (((CONTEXT & 0x7bf7) << 1) | bVal |
- ((line1 >> (7 - k)) & 0x0800) | ((line2 >> (7 - k)) & 0x0010));
+ (((CONTEXT & kOptConstant6[OPT]) << 1) | bVal |
+ ((line1 >> (7 - k)) & kOptConstant7[OPT]) |
+ ((line2 >> (7 + kOptConstant4[OPT] - k)) & kOptConstant8[OPT]));
}
pLine[nLineBytes] = cVal1;
} else {
uint8_t* pLine2 = pLine - nStride;
uint32_t line2 = (h & 1) ? (*pLine2++) : 0;
- uint32_t CONTEXT = (line2 & 0x07f0);
- for (int32_t cc = 0; cc < nLineBytes; cc++) {
+ uint32_t CONTEXT = ((line2 >> kOptConstant4[OPT]) & kOptConstant5[OPT]);
+ for (int32_t cc = 0; cc < nLineBytes; ++cc) {
if (h & 1) {
line2 = (line2 << 8) | (*pLine2++);
}
uint8_t cVal = 0;
- for (int32_t k = 7; k >= 0; k--) {
+ for (int32_t k = 7; k >= 0; --k) {
if (pArithDecoder->IsComplete())
return nullptr;
int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
cVal |= bVal << k;
CONTEXT =
- (((CONTEXT & 0x7bf7) << 1) | bVal | ((line2 >> k) & 0x0010));
+ (((CONTEXT & kOptConstant6[OPT]) << 1) | bVal |
+ ((line2 >> (k + kOptConstant4[OPT])) & kOptConstant8[OPT]));
}
pLine[cc] = cVal;
}
line2 <<= 8;
uint8_t cVal1 = 0;
- for (int32_t k = 0; k < nBitsLeft; k++) {
+ for (int32_t k = 0; k < nBitsLeft; ++k) {
if (pArithDecoder->IsComplete())
return nullptr;
int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
cVal1 |= bVal << (7 - k);
- CONTEXT = (((CONTEXT & 0x7bf7) << 1) | bVal |
- (((line2 >> (7 - k))) & 0x0010));
+ CONTEXT = (((CONTEXT & kOptConstant6[OPT]) << 1) | bVal |
+ (((line2 >> (7 + kOptConstant4[OPT] - k))) &
+ kOptConstant8[OPT]));
}
pLine[nLineBytes] = cVal1;
}
@@ -217,103 +235,6 @@ std::unique_ptr<CJBig2_Image> CJBig2_GRDProc::DecodeArithTemplate0Unopt(
return GBREG;
}
-std::unique_ptr<CJBig2_Image> CJBig2_GRDProc::DecodeArithTemplate1Opt3(
- CJBig2_ArithDecoder* pArithDecoder,
- JBig2ArithCtx* gbContext) {
- auto GBREG = pdfium::MakeUnique<CJBig2_Image>(GBW, GBH);
- if (!GBREG->data())
- return nullptr;
-
- int LTP = 0;
- uint8_t* pLine = GBREG->data();
- int32_t nStride = GBREG->stride();
- int32_t nStride2 = nStride << 1;
- int32_t nLineBytes = ((GBW + 7) >> 3) - 1;
- int32_t nBitsLeft = GBW - (nLineBytes << 3);
- for (uint32_t h = 0; h < GBH; h++) {
- if (TPGDON) {
- if (pArithDecoder->IsComplete())
- return nullptr;
-
- LTP = LTP ^ pArithDecoder->Decode(&gbContext[0x0795]);
- }
- if (LTP) {
- GBREG->CopyLine(h, h - 1);
- } else {
- if (h > 1) {
- uint8_t* pLine1 = pLine - nStride2;
- uint8_t* pLine2 = pLine - nStride;
- uint32_t line1 = (*pLine1++) << 4;
- uint32_t line2 = *pLine2++;
- uint32_t CONTEXT = (line1 & 0x1e00) | ((line2 >> 1) & 0x01f8);
- for (int32_t cc = 0; cc < nLineBytes; cc++) {
- line1 = (line1 << 8) | ((*pLine1++) << 4);
- line2 = (line2 << 8) | (*pLine2++);
- uint8_t cVal = 0;
- for (int32_t k = 7; k >= 0; k--) {
- if (pArithDecoder->IsComplete())
- return nullptr;
-
- int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
- cVal |= bVal << k;
- CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
- ((line1 >> k) & 0x0200) | ((line2 >> (k + 1)) & 0x0008);
- }
- pLine[cc] = cVal;
- }
- line1 <<= 8;
- line2 <<= 8;
- uint8_t cVal1 = 0;
- for (int32_t k = 0; k < nBitsLeft; k++) {
- if (pArithDecoder->IsComplete())
- return nullptr;
-
- int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
- cVal1 |= bVal << (7 - k);
- CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
- ((line1 >> (7 - k)) & 0x0200) |
- ((line2 >> (8 - k)) & 0x0008);
- }
- pLine[nLineBytes] = cVal1;
- } else {
- uint8_t* pLine2 = pLine - nStride;
- uint32_t line2 = (h & 1) ? (*pLine2++) : 0;
- uint32_t CONTEXT = (line2 >> 1) & 0x01f8;
- for (int32_t cc = 0; cc < nLineBytes; cc++) {
- if (h & 1) {
- line2 = (line2 << 8) | (*pLine2++);
- }
- uint8_t cVal = 0;
- for (int32_t k = 7; k >= 0; k--) {
- if (pArithDecoder->IsComplete())
- return nullptr;
-
- int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
- cVal |= bVal << k;
- CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
- ((line2 >> (k + 1)) & 0x0008);
- }
- pLine[cc] = cVal;
- }
- line2 <<= 8;
- uint8_t cVal1 = 0;
- for (int32_t k = 0; k < nBitsLeft; k++) {
- if (pArithDecoder->IsComplete())
- return nullptr;
-
- int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
- cVal1 |= bVal << (7 - k);
- CONTEXT =
- ((CONTEXT & 0x0efb) << 1) | bVal | ((line2 >> (8 - k)) & 0x0008);
- }
- pLine[nLineBytes] = cVal1;
- }
- }
- pLine += nStride;
- }
- return GBREG;
-}
-
std::unique_ptr<CJBig2_Image> CJBig2_GRDProc::DecodeArithTemplate1Unopt(
CJBig2_ArithDecoder* pArithDecoder,
JBig2ArithCtx* gbContext) {
@@ -366,103 +287,6 @@ std::unique_ptr<CJBig2_Image> CJBig2_GRDProc::DecodeArithTemplate1Unopt(
return GBREG;
}
-std::unique_ptr<CJBig2_Image> CJBig2_GRDProc::DecodeArithTemplate2Opt3(
- CJBig2_ArithDecoder* pArithDecoder,
- JBig2ArithCtx* gbContext) {
- auto GBREG = pdfium::MakeUnique<CJBig2_Image>(GBW, GBH);
- if (!GBREG->data())
- return nullptr;
-
- int LTP = 0;
- uint8_t* pLine = GBREG->data();
- int32_t nStride = GBREG->stride();
- int32_t nStride2 = nStride << 1;
- int32_t nLineBytes = ((GBW + 7) >> 3) - 1;
- int32_t nBitsLeft = GBW - (nLineBytes << 3);
- for (uint32_t h = 0; h < GBH; h++) {
- if (TPGDON) {
- if (pArithDecoder->IsComplete())
- return nullptr;
-
- LTP = LTP ^ pArithDecoder->Decode(&gbContext[0x00e5]);
- }
- if (LTP) {
- GBREG->CopyLine(h, h - 1);
- } else {
- if (h > 1) {
- uint8_t* pLine1 = pLine - nStride2;
- uint8_t* pLine2 = pLine - nStride;
- uint32_t line1 = (*pLine1++) << 1;
- uint32_t line2 = *pLine2++;
- uint32_t CONTEXT = (line1 & 0x0380) | ((line2 >> 3) & 0x007c);
- for (int32_t cc = 0; cc < nLineBytes; cc++) {
- line1 = (line1 << 8) | ((*pLine1++) << 1);
- line2 = (line2 << 8) | (*pLine2++);
- uint8_t cVal = 0;
- for (int32_t k = 7; k >= 0; k--) {
- if (pArithDecoder->IsComplete())
- return nullptr;
-
- int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
- cVal |= bVal << k;
- CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
- ((line1 >> k) & 0x0080) | ((line2 >> (k + 3)) & 0x0004);
- }
- pLine[cc] = cVal;
- }
- line1 <<= 8;
- line2 <<= 8;
- uint8_t cVal1 = 0;
- for (int32_t k = 0; k < nBitsLeft; k++) {
- if (pArithDecoder->IsComplete())
- return nullptr;
-
- int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
- cVal1 |= bVal << (7 - k);
- CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
- ((line1 >> (7 - k)) & 0x0080) |
- ((line2 >> (10 - k)) & 0x0004);
- }
- pLine[nLineBytes] = cVal1;
- } else {
- uint8_t* pLine2 = pLine - nStride;
- uint32_t line2 = (h & 1) ? (*pLine2++) : 0;
- uint32_t CONTEXT = (line2 >> 3) & 0x007c;
- for (int32_t cc = 0; cc < nLineBytes; cc++) {
- if (h & 1) {
- line2 = (line2 << 8) | (*pLine2++);
- }
- uint8_t cVal = 0;
- for (int32_t k = 7; k >= 0; k--) {
- if (pArithDecoder->IsComplete())
- return nullptr;
-
- int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
- cVal |= bVal << k;
- CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
- ((line2 >> (k + 3)) & 0x0004);
- }
- pLine[cc] = cVal;
- }
- line2 <<= 8;
- uint8_t cVal1 = 0;
- for (int32_t k = 0; k < nBitsLeft; k++) {
- if (pArithDecoder->IsComplete())
- return nullptr;
-
- int bVal = pArithDecoder->Decode(&gbContext[CONTEXT]);
- cVal1 |= bVal << (7 - k);
- CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
- (((line2 >> (10 - k))) & 0x0004);
- }
- pLine[nLineBytes] = cVal1;
- }
- }
- pLine += nStride;
- }
- return GBREG;
-}
-
std::unique_ptr<CJBig2_Image> CJBig2_GRDProc::DecodeArithTemplate2Unopt(
CJBig2_ArithDecoder* pArithDecoder,
JBig2ArithCtx* gbContext) {
diff --git a/core/fxcodec/jbig2/JBig2_GrdProc.h b/core/fxcodec/jbig2/JBig2_GrdProc.h
index 67d83ddec6..fddb424415 100644
--- a/core/fxcodec/jbig2/JBig2_GrdProc.h
+++ b/core/fxcodec/jbig2/JBig2_GrdProc.h
@@ -73,21 +73,16 @@ class CJBig2_GRDProc {
FXCODEC_STATUS ProgressiveDecodeArithTemplate3Unopt(
ProgressiveArithDecodeState* pState);
- std::unique_ptr<CJBig2_Image> DecodeArithTemplate0Opt3(
+ std::unique_ptr<CJBig2_Image> DecodeArithOpt3(
CJBig2_ArithDecoder* pArithDecoder,
- JBig2ArithCtx* gbContext);
+ JBig2ArithCtx* gbContext,
+ int OPT);
std::unique_ptr<CJBig2_Image> DecodeArithTemplate0Unopt(
CJBig2_ArithDecoder* pArithDecoder,
JBig2ArithCtx* gbContext);
- std::unique_ptr<CJBig2_Image> DecodeArithTemplate1Opt3(
- CJBig2_ArithDecoder* pArithDecoder,
- JBig2ArithCtx* gbContext);
std::unique_ptr<CJBig2_Image> DecodeArithTemplate1Unopt(
CJBig2_ArithDecoder* pArithDecoder,
JBig2ArithCtx* gbContext);
- std::unique_ptr<CJBig2_Image> DecodeArithTemplate2Opt3(
- CJBig2_ArithDecoder* pArithDecoder,
- JBig2ArithCtx* gbContext);
std::unique_ptr<CJBig2_Image> DecodeArithTemplate2Unopt(
CJBig2_ArithDecoder* pArithDecoder,
JBig2ArithCtx* gbContext);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 16:10:38 +0000