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path: root/core/fxcodec/codec/ccodec_faxmodule.cpp
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Diffstat (limited to 'core/fxcodec/codec/ccodec_faxmodule.cpp')
-rw-r--r--core/fxcodec/codec/ccodec_faxmodule.cpp169
1 files changed, 85 insertions, 84 deletions
diff --git a/core/fxcodec/codec/ccodec_faxmodule.cpp b/core/fxcodec/codec/ccodec_faxmodule.cpp
index faa40da6bf..423dfe6857 100644
--- a/core/fxcodec/codec/ccodec_faxmodule.cpp
+++ b/core/fxcodec/codec/ccodec_faxmodule.cpp
@@ -555,25 +555,26 @@ uint32_t CCodec_FaxDecoder::GetSrcOffset() {
return std::min(static_cast<size_t>((m_bitpos + 7) / 8), m_SrcSpan.size());
}
-void FaxG4Decode(const uint8_t* src_buf,
- uint32_t src_size,
- int* pbitpos,
- uint8_t* dest_buf,
- int width,
- int height,
- int pitch) {
+// static
+int CCodec_FaxModule::FaxG4Decode(const uint8_t* src_buf,
+ uint32_t src_size,
+ int starting_bitpos,
+ int width,
+ int height,
+ int pitch,
+ uint8_t* dest_buf) {
if (pitch == 0)
pitch = (width + 7) / 8;
std::vector<uint8_t> ref_buf(pitch, 0xff);
- int bitpos = *pbitpos;
- for (int iRow = 0; iRow < height; iRow++) {
+ int bitpos = starting_bitpos;
+ for (int iRow = 0; iRow < height; ++iRow) {
uint8_t* line_buf = dest_buf + iRow * pitch;
memset(line_buf, 0xff, pitch);
FaxG4GetRow(src_buf, src_size << 3, &bitpos, line_buf, ref_buf, width);
memcpy(ref_buf.data(), line_buf, pitch);
}
- *pbitpos = bitpos;
+ return bitpos;
}
std::unique_ptr<CCodec_ScanlineDecoder> CCodec_FaxModule::CreateDecoder(
@@ -647,138 +648,138 @@ const uint8_t WhiteRunMarkup[80] = {
0x17, 12, 0x1c, 12, 0x1d, 12, 0x1e, 12, 0x1f, 12,
};
-void AddBitStream(uint8_t* dest_buf, int* dest_bitpos, int data, int bitlen) {
- for (int i = bitlen - 1; i >= 0; i--) {
+class CCodec_FaxEncoder {
+ public:
+ CCodec_FaxEncoder(const uint8_t* src_buf, int width, int height, int pitch);
+ ~CCodec_FaxEncoder();
+ void Encode(std::unique_ptr<uint8_t, FxFreeDeleter>* dest_buf,
+ uint32_t* dest_size);
+
+ private:
+ void FaxEncode2DLine(const uint8_t* src_buf);
+ void FaxEncodeRun(int run, bool bWhite);
+ void AddBitStream(int data, int bitlen);
+
+ CFX_BinaryBuf m_DestBuf;
+ std::vector<uint8_t> m_RefLine;
+ uint8_t* m_pLineBuf;
+ int m_DestBitpos;
+ const int m_Cols;
+ const int m_Rows;
+ const int m_Pitch;
+ const uint8_t* m_pSrcBuf;
+};
+
+CCodec_FaxEncoder::CCodec_FaxEncoder(const uint8_t* src_buf,
+ int width,
+ int height,
+ int pitch)
+ : m_Cols(width), m_Rows(height), m_Pitch(pitch), m_pSrcBuf(src_buf) {
+ m_RefLine.resize(m_Pitch);
+ memset(m_RefLine.data(), 0xff, m_Pitch);
+ m_pLineBuf = FX_Alloc2D(uint8_t, m_Pitch, 8);
+ m_DestBuf.SetAllocStep(10240);
+}
+
+CCodec_FaxEncoder::~CCodec_FaxEncoder() {
+ FX_Free(m_pLineBuf);
+}
+
+void CCodec_FaxEncoder::AddBitStream(int data, int bitlen) {
+ for (int i = bitlen - 1; i >= 0; --i, ++m_DestBitpos) {
if (data & (1 << i))
- dest_buf[*dest_bitpos / 8] |= 1 << (7 - *dest_bitpos % 8);
- (*dest_bitpos)++;
+ m_pLineBuf[m_DestBitpos / 8] |= 1 << (7 - m_DestBitpos % 8);
}
}
-void FaxEncodeRun(uint8_t* dest_buf, int* dest_bitpos, int run, bool bWhite) {
+void CCodec_FaxEncoder::FaxEncodeRun(int run, bool bWhite) {
while (run >= 2560) {
- AddBitStream(dest_buf, dest_bitpos, 0x1f, 12);
+ AddBitStream(0x1f, 12);
run -= 2560;
}
if (run >= 64) {
int markup = run - run % 64;
const uint8_t* p = bWhite ? WhiteRunMarkup : BlackRunMarkup;
p += (markup / 64 - 1) * 2;
- AddBitStream(dest_buf, dest_bitpos, *p, p[1]);
+ AddBitStream(*p, p[1]);
}
run %= 64;
const uint8_t* p = bWhite ? WhiteRunTerminator : BlackRunTerminator;
p += run * 2;
- AddBitStream(dest_buf, dest_bitpos, *p, p[1]);
+ AddBitStream(*p, p[1]);
}
-void FaxEncode2DLine(uint8_t* dest_buf,
- int* dest_bitpos,
- const uint8_t* src_buf,
- const std::vector<uint8_t>& ref_buf,
- int cols) {
+void CCodec_FaxEncoder::FaxEncode2DLine(const uint8_t* src_buf) {
int a0 = -1;
bool a0color = true;
while (1) {
- int a1 = FindBit(src_buf, cols, a0 + 1, !a0color);
+ int a1 = FindBit(src_buf, m_Cols, a0 + 1, !a0color);
int b1;
int b2;
- FaxG4FindB1B2(ref_buf, cols, a0, a0color, &b1, &b2);
+ FaxG4FindB1B2(m_RefLine, m_Cols, a0, a0color, &b1, &b2);
if (b2 < a1) {
- *dest_bitpos += 3;
- dest_buf[*dest_bitpos / 8] |= 1 << (7 - *dest_bitpos % 8);
- (*dest_bitpos)++;
+ m_DestBitpos += 3;
+ m_pLineBuf[m_DestBitpos / 8] |= 1 << (7 - m_DestBitpos % 8);
+ ++m_DestBitpos;
a0 = b2;
} else if (a1 - b1 <= 3 && b1 - a1 <= 3) {
int delta = a1 - b1;
switch (delta) {
case 0:
- dest_buf[*dest_bitpos / 8] |= 1 << (7 - *dest_bitpos % 8);
+ m_pLineBuf[m_DestBitpos / 8] |= 1 << (7 - m_DestBitpos % 8);
break;
case 1:
case 2:
case 3:
- *dest_bitpos += delta == 1 ? 1 : delta + 2;
- dest_buf[*dest_bitpos / 8] |= 1 << (7 - *dest_bitpos % 8);
- (*dest_bitpos)++;
- dest_buf[*dest_bitpos / 8] |= 1 << (7 - *dest_bitpos % 8);
+ m_DestBitpos += delta == 1 ? 1 : delta + 2;
+ m_pLineBuf[m_DestBitpos / 8] |= 1 << (7 - m_DestBitpos % 8);
+ ++m_DestBitpos;
+ m_pLineBuf[m_DestBitpos / 8] |= 1 << (7 - m_DestBitpos % 8);
break;
case -1:
case -2:
case -3:
- *dest_bitpos += delta == -1 ? 1 : -delta + 2;
- dest_buf[*dest_bitpos / 8] |= 1 << (7 - *dest_bitpos % 8);
- (*dest_bitpos)++;
+ m_DestBitpos += delta == -1 ? 1 : -delta + 2;
+ m_pLineBuf[m_DestBitpos / 8] |= 1 << (7 - m_DestBitpos % 8);
+ ++m_DestBitpos;
break;
}
- (*dest_bitpos)++;
+ ++m_DestBitpos;
a0 = a1;
a0color = !a0color;
} else {
- int a2 = FindBit(src_buf, cols, a1 + 1, a0color);
- (*dest_bitpos)++;
- (*dest_bitpos)++;
- dest_buf[*dest_bitpos / 8] |= 1 << (7 - *dest_bitpos % 8);
- (*dest_bitpos)++;
+ int a2 = FindBit(src_buf, m_Cols, a1 + 1, a0color);
+ ++m_DestBitpos;
+ ++m_DestBitpos;
+ m_pLineBuf[m_DestBitpos / 8] |= 1 << (7 - m_DestBitpos % 8);
+ ++m_DestBitpos;
if (a0 < 0)
a0 = 0;
- FaxEncodeRun(dest_buf, dest_bitpos, a1 - a0, a0color);
- FaxEncodeRun(dest_buf, dest_bitpos, a2 - a1, !a0color);
+ FaxEncodeRun(a1 - a0, a0color);
+ FaxEncodeRun(a2 - a1, !a0color);
a0 = a2;
}
- if (a0 >= cols)
+ if (a0 >= m_Cols)
return;
}
}
-class CCodec_FaxEncoder {
- public:
- CCodec_FaxEncoder(const uint8_t* src_buf, int width, int height, int pitch);
- ~CCodec_FaxEncoder();
- void Encode(std::unique_ptr<uint8_t, FxFreeDeleter>* dest_buf,
- uint32_t* dest_size);
-
- private:
- CFX_BinaryBuf m_DestBuf;
- std::vector<uint8_t> m_RefLine;
- uint8_t* m_pLineBuf;
- const int m_Cols;
- const int m_Rows;
- const int m_Pitch;
- const uint8_t* m_pSrcBuf;
-};
-
-CCodec_FaxEncoder::CCodec_FaxEncoder(const uint8_t* src_buf,
- int width,
- int height,
- int pitch)
- : m_Cols(width), m_Rows(height), m_Pitch(pitch), m_pSrcBuf(src_buf) {
- m_RefLine.resize(m_Pitch);
- memset(m_RefLine.data(), 0xff, m_Pitch);
- m_pLineBuf = FX_Alloc2D(uint8_t, m_Pitch, 8);
- m_DestBuf.SetAllocStep(10240);
-}
-
-CCodec_FaxEncoder::~CCodec_FaxEncoder() {
- FX_Free(m_pLineBuf);
-}
-
void CCodec_FaxEncoder::Encode(
std::unique_ptr<uint8_t, FxFreeDeleter>* dest_buf,
uint32_t* dest_size) {
- int dest_bitpos = 0;
+ m_DestBitpos = 0;
uint8_t last_byte = 0;
- for (int i = 0; i < m_Rows; i++) {
+ for (int i = 0; i < m_Rows; ++i) {
const uint8_t* scan_line = m_pSrcBuf + i * m_Pitch;
memset(m_pLineBuf, 0, m_Pitch * 8);
m_pLineBuf[0] = last_byte;
- FaxEncode2DLine(m_pLineBuf, &dest_bitpos, scan_line, m_RefLine, m_Cols);
- m_DestBuf.AppendBlock(m_pLineBuf, dest_bitpos / 8);
- last_byte = m_pLineBuf[dest_bitpos / 8];
- dest_bitpos %= 8;
+ FaxEncode2DLine(scan_line);
+ m_DestBuf.AppendBlock(m_pLineBuf, m_DestBitpos / 8);
+ last_byte = m_pLineBuf[m_DestBitpos / 8];
+ m_DestBitpos %= 8;
memcpy(m_RefLine.data(), scan_line, m_Pitch);
}
- if (dest_bitpos)
+ if (m_DestBitpos)
m_DestBuf.AppendByte(last_byte);
*dest_size = m_DestBuf.GetSize();
*dest_buf = m_DestBuf.DetachBuffer();
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 16:07:57 +0000