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-rw-r--r--scumm/smush/codec47.cpp262
-rw-r--r--scumm/smush/codec47.h19
2 files changed, 133 insertions, 148 deletions
diff --git a/scumm/smush/codec47.cpp b/scumm/smush/codec47.cpp
index 99711909e1..04cf3419a0 100644
--- a/scumm/smush/codec47.cpp
+++ b/scumm/smush/codec47.cpp
@@ -223,28 +223,24 @@ static int16 codec47_table[] = {
-6, 43, 1, 43, 0, 0, 0, 0, 0, 0
};
-static byte smush_buf_big[99328];
-static byte smush_buf_small[32768];
-static int16 smush_table[256];
-
void Codec47Decoder::makeTables37(int32 param) {
int32 variable1, variable2;
int32 b1, b2;
int32 value_table37_1_2, value_table37_1_1, value_table37_2_2, value_table37_2_1;
- int32 table[64], tmp, s;
- int32 * table37_1 = 0, * table37_2 = 0, * table_ptr;
- int i, x, y;
+ int32 tableSmallBig[64], tmp, s;
+ int32 * table37_1 = 0, * table37_2 = 0, * ptr_small_big;
byte * ptr;
+ int i, x, y;
if (param == 8) {
table37_1 = &codec37_table[32];
table37_2 = &codec37_table[48];
- ptr = smush_buf_big + 384;
+ ptr = _tableBig + 384;
for (i = 0; i < 256; i++) {
*ptr = 0;
ptr += 388;
}
- ptr = smush_buf_big + 385;
+ ptr = _tableBig + 385;
for (i = 0; i < 256; i++) {
*ptr = 0;
ptr += 388;
@@ -252,12 +248,12 @@ void Codec47Decoder::makeTables37(int32 param) {
} else if (param == 4) {
table37_1 = &codec37_table[0];
table37_2 = &codec37_table[16];
- ptr = smush_buf_small + 96;
+ ptr = _tableSmall + 96;
for (i = 0; i < 256; i++) {
*ptr = 0;
ptr += 128;
}
- ptr = smush_buf_small + 97;
+ ptr = _tableSmall + 97;
for (i = 0; i < 256; i++) {
*ptr = 0;
ptr += 128;
@@ -278,7 +274,7 @@ void Codec47Decoder::makeTables37(int32 param) {
b1 = 0;
} else if (value_table37_2_1 == param - 1) {
b1 = 1;
- } else if (value_table37_1_1 == 0) {
+ } else if (value_table37_1_1 == 0) {
b1 = 2;
} else if (value_table37_1_1 == param - 1) {
b1 = 3;
@@ -298,7 +294,7 @@ void Codec47Decoder::makeTables37(int32 param) {
b2 = 4;
}
- memset(table, 0, param * param * 4);
+ memset(tableSmallBig, 0, param * param * 4);
variable2 = abs(value_table37_2_2 - value_table37_2_1);
tmp = abs(value_table37_1_2 - value_table37_1_1);
@@ -318,31 +314,31 @@ void Codec47Decoder::makeTables37(int32 param) {
variable4 = value_table37_1_1;
variable3 = value_table37_2_1;
}
- table_ptr = &table[param * variable3 + variable4];
- *table_ptr = 1;
+ ptr_small_big = &tableSmallBig[param * variable3 + variable4];
+ *ptr_small_big = 1;
if ((b1 == 2 && b2 == 3) || (b2 == 2 && b1 == 3) ||
(b1 == 0 && b2 != 1) || (b2 == 0 && b1 != 1)) {
if (variable3 >= 0) {
i = variable3 + 1;
while (i--) {
- *table_ptr = 1;
- table_ptr -= param;
+ *ptr_small_big = 1;
+ ptr_small_big -= param;
}
}
} else if ((b2 != 0 && b1 == 1) || (b1 != 0 && b2 == 1)) {
if (param > variable3) {
i = param - variable3;
while (i--) {
- *table_ptr = 1;
- table_ptr += param;
+ *ptr_small_big = 1;
+ ptr_small_big += param;
}
}
} else if ((b1 == 2 && b2 != 3) || (b2 == 2 && b1 != 3)) {
if (variable4 >= 0) {
i = variable4 + 1;
while(i--) {
- *(table_ptr--) = 1;
+ *(ptr_small_big--) = 1;
}
}
} else if ((b1 == 0 && b2 == 1) || (b2 == 0 && b1 == 1) ||
@@ -350,7 +346,7 @@ void Codec47Decoder::makeTables37(int32 param) {
if (param > variable4) {
i = param - variable4;
while(i--) {
- *(table_ptr++) = 1;
+ *(ptr_small_big++) = 1;
}
}
}
@@ -358,24 +354,24 @@ void Codec47Decoder::makeTables37(int32 param) {
if (param == 8) {
for (i = 64 - 1; i >= 0; i--) {
- if (table[i] != 0) {
- smush_buf_big[256 + s + smush_buf_big[384 + s]] = (byte)i;
- smush_buf_big[384 + s]++;
+ if (tableSmallBig[i] != 0) {
+ _tableBig[256 + s + _tableBig[384 + s]] = (byte)i;
+ _tableBig[384 + s]++;
} else {
- smush_buf_big[320 + s + smush_buf_big[385 + s]] = (byte)i;
- smush_buf_big[385 + s]++;
+ _tableBig[320 + s + _tableBig[385 + s]] = (byte)i;
+ _tableBig[385 + s]++;
}
}
s += 388;
}
if (param == 4) {
for (i = 16 - 1; i >= 0; i--) {
- if (table[i] != 0) {
- smush_buf_small[64 + s + smush_buf_small[96 + s]] = (byte)i;
- smush_buf_small[96 + s]++;
+ if (tableSmallBig[i] != 0) {
+ _tableSmall[64 + s + _tableSmall[96 + s]] = (byte)i;
+ _tableSmall[96 + s]++;
} else {
- smush_buf_small[80 + s + smush_buf_small[97 + s]] = (byte)i;
- smush_buf_small[97 + s]++;
+ _tableSmall[80 + s + _tableSmall[97 + s]] = (byte)i;
+ _tableSmall[97 + s]++;
}
}
s += 128;
@@ -393,38 +389,38 @@ void Codec47Decoder::makeTables47(int32 width) {
int32 a, c, d;
int16 tmp;
- int16 *tmp_ptr = smush_table;
+ int16 *tmp_ptr = _table;
int16 *ptr_table = codec47_table;
do {
*tmp_ptr++ = ptr_table[1] * width + ptr_table[0];
ptr_table += 2;
- } while (tmp_ptr < &smush_table[255]);
+ } while (tmp_ptr < &_table[255]);
a = 0;
c = 0;
do {
- for (d = 0; d < smush_buf_small[96 + c]; d++) {
- tmp = smush_buf_small[64 + c + d];
+ for (d = 0; d < _tableSmall[96 + c]; d++) {
+ tmp = _tableSmall[64 + c + d];
tmp = (byte)(tmp >> 2) * width + (tmp & 3);
- smush_buf_small[c + d * 2] = (byte)tmp;
- smush_buf_small[c + d * 2 + 1] = tmp >> 8;
+ _tableSmall[c + d * 2] = (byte)tmp;
+ _tableSmall[c + d * 2 + 1] = tmp >> 8;
}
- for (d = 0; d < smush_buf_small[97 + c]; d++) {
- tmp = smush_buf_small[80 + c + d];
+ for (d = 0; d < _tableSmall[97 + c]; d++) {
+ tmp = _tableSmall[80 + c + d];
tmp = (byte)(tmp >> 2) * width + (tmp & 3);
- smush_buf_small[32 + c + d * 2] = (byte)tmp;
- smush_buf_small[32 + c + d * 2 + 1] = tmp >> 8;
+ _tableSmall[32 + c + d * 2] = (byte)tmp;
+ _tableSmall[32 + c + d * 2 + 1] = tmp >> 8;
}
- for (d = 0; d < smush_buf_big[384 + a]; d++) {
- tmp = smush_buf_big[256 + a + d];
+ for (d = 0; d < _tableBig[384 + a]; d++) {
+ tmp = _tableBig[256 + a + d];
tmp = (byte)(tmp >> 3) * width + (tmp & 7);
- smush_buf_big[a + d * 2] = (byte)tmp;
- smush_buf_big[a + d * 2 + 1] = tmp >> 8;
+ _tableBig[a + d * 2] = (byte)tmp;
+ _tableBig[a + d * 2 + 1] = tmp >> 8;
}
- for (d = 0; d < smush_buf_big[385 + a]; d++) {
- tmp = smush_buf_big[320 + a + d];
+ for (d = 0; d < _tableBig[385 + a]; d++) {
+ tmp = _tableBig[320 + a + d];
tmp = (byte)(tmp >> 3) * width + (tmp & 7);
- smush_buf_big[128 + a + d * 2] = (byte)tmp;
- smush_buf_big[128 + a + d * 2 + 1] = tmp >> 8;
+ _tableBig[128 + a + d * 2] = (byte)tmp;
+ _tableBig[128 + a + d * 2 + 1] = tmp >> 8;
}
a += 388;
@@ -453,191 +449,176 @@ void Codec47Decoder::bompDecode(byte *dst, byte *src, int32 len) {
assert(len == 0);
}
-static int32 codec47_decode2_offset1;
-static int32 codec47_decode2_offset2;
-static byte * codec47_decode2_param_ptr;
-static int32 codec47_subgfx_width_blocks;
-static int32 codec47_subgfx_height_blocks;
-static int32 codec47_subgfx_width_pixels;
-static byte * d_src;
-
-static void codec47_subgfx_lev4(byte * d_dst, const int32 d_pitch) {
+void Codec47Decoder::level3(byte * d_dst) {
int32 tmp;
- byte code = *d_src++;
+ byte code = *_d_src++;
if (code < 0xF8) {
- tmp = smush_table[code] + codec47_decode2_offset1;
- *(uint16*)(d_dst + (d_pitch * 0)) = *(uint16*)(d_dst + (d_pitch * 0) + tmp);
- *(uint16*)(d_dst + (d_pitch * 1)) = *(uint16*)(d_dst + (d_pitch * 1) + tmp);
+ tmp = _table[code] + _offset1;
+ *(uint16*)(d_dst + (_d_pitch * 0)) = *(uint16*)(d_dst + (_d_pitch * 0) + tmp);
+ *(uint16*)(d_dst + (_d_pitch * 1)) = *(uint16*)(d_dst + (_d_pitch * 1) + tmp);
} else if (code == 0xFF) {
- *(uint16*)(d_dst + (d_pitch * 0)) = *(uint16*)(d_src + 0);
- *(uint16*)(d_dst + (d_pitch * 1)) = *(uint16*)(d_src + 2);
- d_src += 4;
+ *(uint16*)(d_dst + (_d_pitch * 0)) = *(uint16*)(_d_src + 0);
+ *(uint16*)(d_dst + (_d_pitch * 1)) = *(uint16*)(_d_src + 2);
+ _d_src += 4;
} else if (code == 0xFE) {
- byte t = *d_src++;
+ byte t = *_d_src++;
tmp = t | t << 8;
- *(uint16*)(d_dst + (d_pitch * 0)) = (uint16)tmp;
- *(uint16*)(d_dst + (d_pitch * 1)) = (uint16)tmp;
+ *(uint16*)(d_dst + (_d_pitch * 0)) = (uint16)tmp;
+ *(uint16*)(d_dst + (_d_pitch * 1)) = (uint16)tmp;
} else if (code == 0xFC) {
- tmp = codec47_decode2_offset2;
- *(uint16*)(d_dst + (d_pitch * 0)) = *(uint16*)(d_dst + (d_pitch * 0) + tmp);
- *(uint16*)(d_dst + (d_pitch * 1)) = *(uint16*)(d_dst + (d_pitch * 1) + tmp);
+ tmp = _offset2;
+ *(uint16*)(d_dst + (_d_pitch * 0)) = *(uint16*)(d_dst + (_d_pitch * 0) + tmp);
+ *(uint16*)(d_dst + (_d_pitch * 1)) = *(uint16*)(d_dst + (_d_pitch * 1) + tmp);
} else {
- byte t = codec47_decode2_param_ptr[code];
+ byte t = _paramPtr[code];
tmp = t | t << 8;
- *(uint16*)(d_dst + (d_pitch * 0)) = (uint16)tmp;
- *(uint16*)(d_dst + (d_pitch * 1)) = (uint16)tmp;
+ *(uint16*)(d_dst + (_d_pitch * 0)) = (uint16)tmp;
+ *(uint16*)(d_dst + (_d_pitch * 1)) = (uint16)tmp;
}
}
-static void codec47_subgfx_lev3(byte * d_dst, const int32 d_pitch) {
+void Codec47Decoder::level2(byte * d_dst) {
int32 tmp;
- byte code = *d_src++;
+ byte code = *_d_src++;
int i;
if (code < 0xF8) {
- tmp = smush_table[code] + codec47_decode2_offset1;
+ tmp = _table[code] + _offset1;
for (i = 0; i < 4; i++) {
*(uint32*)(d_dst) = *(uint32*)(d_dst + tmp);
- d_dst += d_pitch;
+ d_dst += _d_pitch;
}
} else if (code == 0xFF) {
byte * tmp_dst = d_dst;
- codec47_subgfx_lev4(d_dst, d_pitch);
+ level3(d_dst);
d_dst += 2;
- codec47_subgfx_lev4(d_dst, d_pitch);
- d_dst += d_pitch * 2 - 2;
- codec47_subgfx_lev4(d_dst, d_pitch);
+ level3(d_dst);
+ d_dst += _d_pitch * 2 - 2;
+ level3(d_dst);
d_dst += 2;
- codec47_subgfx_lev4(d_dst, d_pitch);
+ level3(d_dst);
d_dst = tmp_dst;
} else if (code == 0xFE) {
- byte t = *d_src++;
+ byte t = *_d_src++;
uint32 val = t << 24 | t << 16 | t << 8 | t;
for (i = 0; i < 4; i++) {
*(uint32*)(d_dst) = val;
- d_dst += d_pitch;
+ d_dst += _d_pitch;
}
} else if (code == 0xFD) {
- byte * tmp_ptr = (*d_src++ << 7) + smush_buf_small;
- int32 l = *(tmp_ptr + 96);
- byte val = *d_src++;
+ byte * tmp_ptr = _tableSmall + (*_d_src++ << 7);
+ int32 l = tmp_ptr[96];
+ byte val = *_d_src++;
int16 * tmp_ptr2 = (int16*)tmp_ptr;
while(l--) {
*(d_dst + READ_LE_UINT16(tmp_ptr2)) = val;
tmp_ptr2++;
}
- l = *(tmp_ptr + 97);
- val = *d_src++;
+ l = tmp_ptr[97];
+ val = *_d_src++;
tmp_ptr2 = (int16*)(tmp_ptr + 32);
while(l--) {
*(d_dst + READ_LE_UINT16(tmp_ptr2)) = val;
tmp_ptr2++;
}
} else if (code == 0xFC) {
- tmp = codec47_decode2_offset2;
+ tmp = _offset2;
for (i = 0; i < 4; i++) {
*(uint32*)(d_dst) = *(uint32*)(d_dst + tmp);
- d_dst += d_pitch;
+ d_dst += _d_pitch;
}
} else {
- byte t = codec47_decode2_param_ptr[code];
+ byte t = _paramPtr[code];
uint32 val = t << 24 | t << 16 | t << 8 | t;
for (i = 0; i < 4; i++) {
*(uint32*)(d_dst) = val;
- d_dst += d_pitch;
+ d_dst += _d_pitch;
}
}
}
-static void codec47_subgfx_lev2(byte * d_dst, const int32 d_pitch) {
+void Codec47Decoder::level1(byte * d_dst) {
int32 tmp, tmp2;
- byte code = *d_src++;
+ byte code = *_d_src++;
int i;
if (code < 0xF8) {
- tmp2 = smush_table[code] + codec47_decode2_offset1;
+ tmp2 = _table[code] + _offset1;
for (i = 0; i < 8; i++) {
*(uint32*)(d_dst + 0) = *(uint32*)(d_dst + tmp2);
*(uint32*)(d_dst + 4) = *(uint32*)(d_dst + tmp2 + 4);
- d_dst += d_pitch;
+ d_dst += _d_pitch;
}
} else if (code == 0xFF) {
byte * tmp_dst = d_dst;
- codec47_subgfx_lev3(d_dst, d_pitch);
+ level2(d_dst);
d_dst += 4;
- codec47_subgfx_lev3(d_dst, d_pitch);
- d_dst += d_pitch * 4 - 4;
- codec47_subgfx_lev3(d_dst, d_pitch);
+ level2(d_dst);
+ d_dst += _d_pitch * 4 - 4;
+ level2(d_dst);
d_dst += 4;
- codec47_subgfx_lev3(d_dst, d_pitch);
+ level2(d_dst);
d_dst = tmp_dst;
} else if (code == 0xFE) {
- byte t = *d_src++;
+ byte t = *_d_src++;
int32 val = t << 24 | t << 16 | t << 8 | t;
for (i = 0; i < 8; i++) {
*(uint32*)(d_dst) = val;
*(uint32*)(d_dst + 4) = val;
- d_dst += d_pitch;
+ d_dst += _d_pitch;
}
} else if (code == 0xFD) {
- tmp = *d_src++;
- tmp2 = tmp * 4;
- tmp <<= 7;
- int32 tmp3 = tmp2 + tmp * 2;
- byte * tmp_ptr = tmp + tmp3 + smush_buf_big;
- byte l = *(tmp_ptr + 384);
- byte val = *d_src++;
+ tmp = *_d_src++;
+ byte * tmp_ptr = _tableBig + (tmp << 2) + (tmp << 7) + (tmp << 8);
+ byte l = tmp_ptr[384];
+ byte val = *_d_src++;
int16 * tmp_ptr2 = (int16*)tmp_ptr;
while(l--) {
*(d_dst + READ_LE_UINT16(tmp_ptr2)) = val;
tmp_ptr2++;
}
- l = *(tmp_ptr + 385);
- val = *d_src++;
+ l = tmp_ptr[385];
+ val = *_d_src++;
tmp_ptr2 = (int16*)(tmp_ptr + 128);
while(l--) {
*(d_dst + READ_LE_UINT16(tmp_ptr2)) = val;
tmp_ptr2++;
}
} else if (code == 0xFC) {
- tmp2 = codec47_decode2_offset2;
+ tmp2 = _offset2;
for (i = 0; i < 8; i++) {
*(uint32*)(d_dst + 0) = *(uint32*)(d_dst + tmp2);
*(uint32*)(d_dst + 4) = *(uint32*)(d_dst + tmp2 + 4);
- d_dst += d_pitch;
+ d_dst += _d_pitch;
}
} else {
- byte t = *(codec47_decode2_param_ptr + code);
+ byte t = _paramPtr[code];
int32 val = t << 24 | t << 16 | t << 8 | t;
for (i = 0; i < 8; i++) {
*(uint32*)(d_dst) = val;
*(uint32*)(d_dst + 4) = val;
- d_dst += d_pitch;
+ d_dst += _d_pitch;
}
}
}
-void Codec47Decoder::decode2(byte * dst, byte * src, int32 offset1, int32 offset2, int32 pitch,
- int16 * tmp_table, byte * param_ptr, int32 height,
- byte * buf_small, byte * buf_big) {
- d_src = src;
- codec47_decode2_offset1 = offset1;
- codec47_decode2_offset2 = offset2;
- codec47_decode2_param_ptr = param_ptr - 0xf8;
- codec47_subgfx_height_blocks = (height + 7) >> 3;
- codec47_subgfx_width_blocks = (pitch + 7) >> 3;
- codec47_subgfx_width_pixels = pitch << 3;
- codec47_subgfx_width_pixels -= pitch;
+void Codec47Decoder::decode2(byte *dst, byte *src, int32 width, int32 height, byte *param_ptr) {
+ _d_src = src;
+ _paramPtr = param_ptr - 0xf8;
+ int32 bw = (width + 7) >> 3;
+ int32 bh = (height + 7) >> 3;
+ int32 next_line = width * 7;
+ _d_pitch = width;
do {
- int32 tmp_codec47_subgfx_width_blocks = codec47_subgfx_width_blocks;
+ int32 tmp_bw = bw;
do {
- codec47_subgfx_lev2(dst, pitch);
+ level1(dst);
dst += 8;
- } while (--tmp_codec47_subgfx_width_blocks);
- dst += codec47_subgfx_width_pixels;
- } while (--codec47_subgfx_height_blocks);
+ } while (--tmp_bw);
+ dst += next_line;
+ } while (--bh);
}
bool Codec47Decoder::initSize(const Point & p, const Rect & r) {
@@ -686,17 +667,17 @@ Codec47Decoder::~Codec47Decoder() {
bool Codec47Decoder::decode(Blitter & dst, Chunk & src) {
int32 width = getRect().width();
int32 height = getRect().height();
- int32 offset1 = _deltaBufs[1] - _curBuf;
- int32 offset2 = _deltaBufs[0] - _curBuf;
+ _offset1 = _deltaBufs[1] - _curBuf;
+ _offset2 = _deltaBufs[0] - _curBuf;
int32 chunk_size = src.getSize() - 14;
- byte * chunk_buffer = (byte*)malloc(chunk_size);
+ byte *chunk_buffer = (byte*)malloc(chunk_size);
src.read(chunk_buffer, chunk_size);
int32 seq_nb = READ_LE_UINT16(chunk_buffer + 0);
- byte * gfx_data = chunk_buffer + 26;
- byte * tmp_ptr;
+ byte *gfx_data = chunk_buffer + 26;
+ byte *tmp_ptr;
if (seq_nb == 0) {
makeTables47(width);
@@ -718,8 +699,7 @@ bool Codec47Decoder::decode(Blitter & dst, Chunk & src) {
break;
case 2:
if (seq_nb == _prevSeqNb + 1) {
- decode2(_curBuf, gfx_data, offset1, offset2, width, smush_table,
- chunk_buffer + 8, height, smush_buf_small, smush_buf_big);
+ decode2(_curBuf, gfx_data, width, height, chunk_buffer + 8);
}
break;
case 3:
diff --git a/scumm/smush/codec47.h b/scumm/smush/codec47.h
index 2ec8cd1018..0f67bef747 100644
--- a/scumm/smush/codec47.h
+++ b/scumm/smush/codec47.h
@@ -34,21 +34,26 @@ private:
byte * _curBuf;
int32 _prevSeqNb;
int32 _lastTableWidth;
+ byte * _d_src, * _paramPtr;
+ int32 _d_pitch;
+ int32 _offset1, _offset2;
+ byte _tableBig[99328];
+ byte _tableSmall[32768];
+ int16 _table[256];
void makeTables47(int32 width);
void makeTables37(int32 param);
void bompDecode(byte *dst, byte *src, int32 len);
- void decode2(byte * dst, byte * src, int32 offset1, int32 offset2, int32 pitch,
- int16 * tmp_table, byte * param_ptr, int32 height,
- byte * buf_small, byte * buf_big);
+ void level1(byte * d_dst);
+ void level2(byte * d_dst);
+ void level3(byte * d_dst);
+ void decode2(byte * dst, byte * src, int32 width, int32 height, byte * param_ptr);
public:
- bool initSize(const Point &, const Rect &);
Codec47Decoder();
- void clean();
virtual ~Codec47Decoder();
-
-public:
+ bool initSize(const Point &, const Rect &);
+ void clean();
bool decode(Blitter &, Chunk &);
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 05:38:22 +0000