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scummvm/blocky16.cpp

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// Residual - Virtual machine to run LucasArts' 3D adventure games
// Copyright (C) 2003 The ScummVM-Residual Team (www.scummvm.org)
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include "stdafx.h"
#include "bits.h"
#include "blocky16.h"
#include "debug.h"
static int8 codec47_table_small1[] = {
0, 1, 2, 3, 3, 3, 3, 2, 1, 0, 0, 0, 1, 2, 2, 1,
};
static int8 codec47_table_small2[] = {
0, 0, 0, 0, 1, 2, 3, 3, 3, 3, 2, 1, 1, 1, 2, 2,
};
static int8 codec47_table_big1[] = {
0, 2, 5, 7, 7, 7, 7, 7, 7, 5, 2, 0, 0, 0, 0, 0,
};
static int8 codec47_table_big2[] = {
0, 0, 0, 0, 1, 3, 4, 6, 7, 7, 7, 7, 6, 4, 3, 1,
};
static int8 codec47_table[] = {
0, 0, -1, -43, 6, -43, -9, -42, 13, -41,
-16, -40, 19, -39, -23, -36, 26, -34, -2, -33,
4, -33, -29, -32, -9, -32, 11, -31, -16, -29,
32, -29, 18, -28, -34, -26, -22, -25, -1, -25,
3, -25, -7, -24, 8, -24, 24, -23, 36, -23,
-12, -22, 13, -21, -38, -20, 0, -20, -27, -19,
-4, -19, 4, -19, -17, -18, -8, -17, 8, -17,
18, -17, 28, -17, 39, -17, -12, -15, 12, -15,
-21, -14, -1, -14, 1, -14, -41, -13, -5, -13,
5, -13, 21, -13, -31, -12, -15, -11, -8, -11,
8, -11, 15, -11, -2, -10, 1, -10, 31, -10,
-23, -9, -11, -9, -5, -9, 4, -9, 11, -9,
42, -9, 6, -8, 24, -8, -18, -7, -7, -7,
-3, -7, -1, -7, 2, -7, 18, -7, -43, -6,
-13, -6, -4, -6, 4, -6, 8, -6, -33, -5,
-9, -5, -2, -5, 0, -5, 2, -5, 5, -5,
13, -5, -25, -4, -6, -4, -3, -4, 3, -4,
9, -4, -19, -3, -7, -3, -4, -3, -2, -3,
-1, -3, 0, -3, 1, -3, 2, -3, 4, -3,
6, -3, 33, -3, -14, -2, -10, -2, -5, -2,
-3, -2, -2, -2, -1, -2, 0, -2, 1, -2,
2, -2, 3, -2, 5, -2, 7, -2, 14, -2,
19, -2, 25, -2, 43, -2, -7, -1, -3, -1,
-2, -1, -1, -1, 0, -1, 1, -1, 2, -1,
3, -1, 10, -1, -5, 0, -3, 0, -2, 0,
-1, 0, 1, 0, 2, 0, 3, 0, 5, 0,
7, 0, -10, 1, -7, 1, -3, 1, -2, 1,
-1, 1, 0, 1, 1, 1, 2, 1, 3, 1,
-43, 2, -25, 2, -19, 2, -14, 2, -5, 2,
-3, 2, -2, 2, -1, 2, 0, 2, 1, 2,
2, 2, 3, 2, 5, 2, 7, 2, 10, 2,
14, 2, -33, 3, -6, 3, -4, 3, -2, 3,
-1, 3, 0, 3, 1, 3, 2, 3, 4, 3,
19, 3, -9, 4, -3, 4, 3, 4, 7, 4,
25, 4, -13, 5, -5, 5, -2, 5, 0, 5,
2, 5, 5, 5, 9, 5, 33, 5, -8, 6,
-4, 6, 4, 6, 13, 6, 43, 6, -18, 7,
-2, 7, 0, 7, 2, 7, 7, 7, 18, 7,
-24, 8, -6, 8, -42, 9, -11, 9, -4, 9,
5, 9, 11, 9, 23, 9, -31, 10, -1, 10,
2, 10, -15, 11, -8, 11, 8, 11, 15, 11,
31, 12, -21, 13, -5, 13, 5, 13, 41, 13,
-1, 14, 1, 14, 21, 14, -12, 15, 12, 15,
-39, 17, -28, 17, -18, 17, -8, 17, 8, 17,
17, 18, -4, 19, 0, 19, 4, 19, 27, 19,
38, 20, -13, 21, 12, 22, -36, 23, -24, 23,
-8, 24, 7, 24, -3, 25, 1, 25, 22, 25,
34, 26, -18, 28, -32, 29, 16, 29, -11, 31,
9, 32, 29, 32, -4, 33, 2, 33, -26, 34,
23, 36, -19, 39, 16, 40, -13, 41, 9, 42,
-6, 43, 1, 43, 0, 0, 0, 0, 0, 0
};
void Blocky16::makeTablesInterpolation(int param) {
int32 variable1, variable2;
int32 b1, b2;
int32 value_table47_1_2, value_table47_1_1, value_table47_2_2, value_table47_2_1;
int32 tableSmallBig[64], tmp, s;
int8 *table47_1 = 0, *table47_2 = 0;
int32 *ptr_small_big;
byte *ptr;
int i, x, y;
if (param == 8) {
table47_1 = codec47_table_big1;
table47_2 = codec47_table_big2;
ptr = _tableBig + 384;
for (i = 0; i < 256; i++) {
*ptr = 0;
ptr += 388;
}
ptr = _tableBig + 385;
for (i = 0; i < 256; i++) {
*ptr = 0;
ptr += 388;
}
} else if (param == 4) {
table47_1 = codec47_table_small1;
table47_2 = codec47_table_small2;
ptr = _tableSmall + 96;
for (i = 0; i < 256; i++) {
*ptr = 0;
ptr += 128;
}
ptr = _tableSmall + 97;
for (i = 0; i < 256; i++) {
*ptr = 0;
ptr += 128;
}
} else {
error("Blocky16::makeTablesInterpolation: unknown param %d", param);
}
s = 0;
for (x = 0; x < 16; x++) {
value_table47_1_1 = table47_1[x];
value_table47_2_1 = table47_2[x];
for (y = 0; y < 16; y++) {
value_table47_1_2 = table47_1[y];
value_table47_2_2 = table47_2[y];
if (value_table47_2_1 == 0) {
b1 = 0;
} else if (value_table47_2_1 == param - 1) {
b1 = 1;
} else if (value_table47_1_1 == 0) {
b1 = 2;
} else if (value_table47_1_1 == param - 1) {
b1 = 3;
} else {
b1 = 4;
}
if (value_table47_2_2 == 0) {
b2 = 0;
} else if (value_table47_2_2 == param - 1) {
b2 = 1;
} else if (value_table47_1_2 == 0) {
b2 = 2;
} else if (value_table47_1_2 == param - 1) {
b2 = 3;
} else {
b2 = 4;
}
memset(tableSmallBig, 0, param * param * 4);
variable2 = abs(value_table47_2_2 - value_table47_2_1);
tmp = abs(value_table47_1_2 - value_table47_1_1);
if (variable2 <= tmp) {
variable2 = tmp;
}
for (variable1 = 0; variable1 <= variable2; variable1++) {
int32 variable3, variable4;
if (variable2 > 0) {
// Linearly interpolate between value_table47_1_1 and value_table47_1_2
// respectively value_table47_2_1 and value_table47_2_2.
variable4 = (value_table47_1_1 * variable1 + value_table47_1_2 * (variable2 - variable1) + variable2 / 2) / variable2;
variable3 = (value_table47_2_1 * variable1 + value_table47_2_2 * (variable2 - variable1) + variable2 / 2) / variable2;
} else {
variable4 = value_table47_1_1;
variable3 = value_table47_2_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--) {
*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--) {
*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--) {
*(ptr_small_big--) = 1;
}
}
} else if ((b1 == 0 && b2 == 1) || (b2 == 0 && b1 == 1) ||
(b1 == 3 && b2 != 2) || (b2 == 3 && b1 != 2)) {
if (param > variable4) {
i = param - variable4;
while (i--) {
*(ptr_small_big++) = 1;
}
}
}
}
if (param == 8) {
for (i = 64 - 1; i >= 0; i--) {
if (tableSmallBig[i] != 0) {
_tableBig[256 + s + _tableBig[384 + s]] = (byte)i;
_tableBig[384 + s]++;
} else {
_tableBig[320 + s + _tableBig[385 + s]] = (byte)i;
_tableBig[385 + s]++;
}
}
s += 388;
}
if (param == 4) {
for (i = 16 - 1; i >= 0; i--) {
if (tableSmallBig[i] != 0) {
_tableSmall[64 + s + _tableSmall[96 + s]] = (byte)i;
_tableSmall[96 + s]++;
} else {
_tableSmall[80 + s + _tableSmall[97 + s]] = (byte)i;
_tableSmall[97 + s]++;
}
}
s += 128;
}
}
}
}
void Blocky16::makeTables47(int width) {
if (_lastTableWidth == width)
return;
_lastTableWidth = width;
int32 a, c, d;
int16 tmp;
for (int l = 0; l < 512; l += 2) {
_table[l / 2] = (int16)(codec47_table[l + 1] * width + codec47_table[l]);
}
a = 0;
c = 0;
do {
for (d = 0; d < _tableSmall[96 + c]; d++) {
tmp = _tableSmall[64 + c + d];
tmp = (int16)((byte)(tmp >> 2) * width + (tmp & 3));
_tableSmall[c + d * 2] = (byte)tmp;
_tableSmall[c + d * 2 + 1] = tmp >> 8;
}
for (d = 0; d < _tableSmall[97 + c]; d++) {
tmp = _tableSmall[80 + c + d];
tmp = (int16)((byte)(tmp >> 2) * width + (tmp & 3));
_tableSmall[32 + c + d * 2] = (byte)tmp;
_tableSmall[32 + c + d * 2 + 1] = tmp >> 8;
}
for (d = 0; d < _tableBig[384 + a]; d++) {
tmp = _tableBig[256 + a + d];
tmp = (int16)((byte)(tmp >> 3) * width + (tmp & 7));
_tableBig[a + d * 2] = (byte)tmp;
_tableBig[a + d * 2 + 1] = tmp >> 8;
}
for (d = 0; d < _tableBig[385 + a]; d++) {
tmp = _tableBig[320 + a + d];
tmp = (int16)((byte)(tmp >> 3) * width + (tmp & 7));
_tableBig[128 + a + d * 2] = (byte)tmp;
_tableBig[128 + a + d * 2 + 1] = tmp >> 8;
}
a += 388;
c += 128;
} while (c < 32768);
}
void Blocky16::level3(byte *d_dst) {
int32 tmp2;
uint32 t, val;
byte code = *_d_src++;
int i;
if (code <= 0xF5) {
if (code == 0xF5) {
int16 tmp = READ_LE_UINT16(_d_src);
tmp2 = tmp * 2;
_d_src += 2;
} else {
tmp2 = _table[code] * 2;
}
tmp2 += _offset1;
for (i = 0; i < 2; i++) {
*(uint32 *)(d_dst + 0) = *(uint32 *)(d_dst + tmp2 + 0);
d_dst += _d_pitch;
}
} else if ((code == 0xFF) || (code == 0xF8)) {
*(uint32 *)(d_dst) = *(uint32 *)(_d_src);
d_dst += _d_pitch;
*(uint32 *)(d_dst) = *(uint32 *)(_d_src + 4);
_d_src += 8;
} else if (code == 0xFD) {
t = *_d_src++;
t = READ_LE_UINT16(_param6_7Ptr + t * 2);
t = ((t << 16) & 0xffff0000) | (t & 0xffff);
for (i = 0; i < 2; i++) {
*(uint32 *)(d_dst + 0) = t;
d_dst += _d_pitch;
}
} else if (code == 0xFE) {
t = READ_LE_UINT16(_d_src);
_d_src += 2;
t = ((t << 16) & 0xffff0000) | (t & 0xffff);
for (i = 0; i < 2; i++) {
*(uint32 *)(d_dst + 0) = t;
d_dst += _d_pitch;
}
} else if (code == 0xF6) {
tmp2 = _offset2;
for (i = 0; i < 2; i++) {
*(uint32 *)(d_dst + 0) = *(uint32 *)(d_dst + tmp2 + 0);
d_dst += _d_pitch;
}
} else if (code == 0xF7) {
tmp2 = READ_LE_UINT32(_d_src);
_d_src += 4;
val = READ_LE_UINT16(_param6_7Ptr + (tmp2 & 0xff) * 2);
*(uint16 *)(d_dst + 0) = val;
val = READ_LE_UINT16(_param6_7Ptr + ((tmp2 >> 8) & 0xff) * 2);
*(uint16 *)(d_dst + 2) = val;
tmp2 >>= 16;
d_dst += _d_pitch;
val = READ_LE_UINT16(_param6_7Ptr + (tmp2 & 0xff) * 2);
*(uint16 *)(d_dst + 0) = val;
val = READ_LE_UINT16(_param6_7Ptr + ((tmp2 >> 8) & 0xff) * 2);
*(uint16 *)(d_dst + 2) = val;
} else if ((code == 0xF9) || (code == 0xFA) || (code == 0xFB) || (code == 0xFC)) {
t = READ_LE_UINT16(_paramPtr + code * 2);
t = ((t << 16) & 0xffff0000) | (t & 0xffff);
for (i = 0; i < 2; i++) {
*(uint32 *)(d_dst + 0) = t;
d_dst += _d_pitch;
}
}
}
void Blocky16::level2(byte *d_dst) {
int32 tmp2;
uint32 t, val;
byte code = *_d_src++;
int i;
if (code <= 0xF5) {
if (code == 0xF5) {
int16 tmp = READ_LE_UINT16(_d_src);
tmp2 = tmp * 2;
_d_src += 2;
} else {
tmp2 = _table[code] * 2;
}
tmp2 += _offset1;
for (i = 0; i < 4; i++) {
*(uint32 *)(d_dst + 0) = *(uint32 *)(d_dst + tmp2 + 0);
*(uint32 *)(d_dst + 4) = *(uint32 *)(d_dst + tmp2 + 4);
d_dst += _d_pitch;
}
} else if (code == 0xFF) {
level3(d_dst);
d_dst += 4;
level3(d_dst);
d_dst += _d_pitch * 2 - 4;
level3(d_dst);
d_dst += 4;
level3(d_dst);
} else if (code == 0xF6) {
tmp2 = _offset2;
for (i = 0; i < 4; i++) {
*(uint32 *)(d_dst + 0) = *(uint32 *)(d_dst + tmp2 + 0);
*(uint32 *)(d_dst + 4) = *(uint32 *)(d_dst + tmp2 + 4);
d_dst += _d_pitch;
}
} else if ((code == 0xF7) || (code == 0xF8)) {
byte tmp = *_d_src++;
if (code == 0xF8) {
val = READ_LE_UINT32(_d_src);
_d_src += 4;
} else {
tmp2 = READ_LE_UINT16(_d_src);
val = READ_LE_UINT16(_param6_7Ptr + ((tmp2 >> 8) & 0xff) * 2) << 16;
val |= READ_LE_UINT16(_param6_7Ptr + (tmp2 & 0xff) * 2);
_d_src += 2;
}
byte *tmp_ptr = _tableSmall + (tmp << 7);
byte l = tmp_ptr[96];
int16 *tmp_ptr2 = (int16 *)tmp_ptr;
while (l--) {
*(uint16* )(d_dst + READ_LE_UINT16(tmp_ptr2) * 2) = val & 0xffff;
tmp_ptr2++;
}
l = tmp_ptr[97];
val >>= 16;
tmp_ptr2 = (int16 *)(tmp_ptr + 32);
while (l--) {
*(uint16* )(d_dst + READ_LE_UINT16(tmp_ptr2) * 2) = val;
tmp_ptr2++;
}
} else if (code >= 0xF9) {
if (code == 0xFD) {
t = *_d_src++;
t = READ_LE_UINT16(_param6_7Ptr + t * 2);
t = ((t << 16) & 0xffff0000) | (t & 0xffff);
} else if (code == 0xFE) {
t = READ_LE_UINT16(_d_src);
t = ((t << 16) & 0xffff0000) | (t & 0xffff);
_d_src += 2;
} else if ((code == 0xF9) || (code == 0xFA) || (code == 0xFB) || (code == 0xFC)) {
t = READ_LE_UINT16(_paramPtr + code * 2);
t = ((t << 16) & 0xffff0000) | (t & 0xffff);
}
for (i = 0; i < 4; i++) {
*(uint32 *)(d_dst + 0) = t;
*(uint32 *)(d_dst + 4) = t;
d_dst += _d_pitch;
}
}
}
void Blocky16::level1(byte *d_dst) {
int32 tmp2;
uint32 t, val;
byte code = *_d_src++;
int i;
if (code <= 0xF5) {
if (code == 0xF5) {
int16 tmp = READ_LE_UINT16(_d_src);
tmp2 = tmp * 2;
_d_src += 2;
} else {
tmp2 = _table[code] * 2;
}
tmp2 += _offset1;
for (i = 0; i < 8; i++) {
*(uint32 *)(d_dst + 0) = *(uint32 *)(d_dst + tmp2 + 0);
*(uint32 *)(d_dst + 4) = *(uint32 *)(d_dst + tmp2 + 4);
*(uint32 *)(d_dst + 8) = *(uint32 *)(d_dst + tmp2 + 8);
*(uint32 *)(d_dst + 12) = *(uint32 *)(d_dst + tmp2 + 12);
d_dst += _d_pitch;
}
} else if (code == 0xFF) {
level2(d_dst);
d_dst += 8;
level2(d_dst);
d_dst += _d_pitch * 4 - 8;
level2(d_dst);
d_dst += 8;
level2(d_dst);
} else if (code == 0xF6) {
tmp2 = _offset2;
for (i = 0; i < 8; i++) {
*(uint32 *)(d_dst + 0) = *(uint32 *)(d_dst + tmp2 + 0);
*(uint32 *)(d_dst + 4) = *(uint32 *)(d_dst + tmp2 + 4);
*(uint32 *)(d_dst + 8) = *(uint32 *)(d_dst + tmp2 + 8);
*(uint32 *)(d_dst + 12) = *(uint32 *)(d_dst + tmp2 + 12);
d_dst += _d_pitch;
}
} else if ((code == 0xF7) || (code == 0xF8)) {
byte tmp = *_d_src++;
if (code == 0xF8) {
val = READ_LE_UINT32(_d_src);
_d_src += 4;
} else {
tmp2 = READ_LE_UINT16(_d_src);
val = READ_LE_UINT16(_param6_7Ptr + ((tmp2 >> 8) & 0xff) * 2) << 16;
val |= READ_LE_UINT16(_param6_7Ptr + (tmp2 & 0xff) * 2);
_d_src += 2;
}
byte *tmp_ptr = _tableBig + (tmp * 4) + (tmp << 7) + (tmp << 7) + (tmp << 7);
byte l = tmp_ptr[384];
int16 *tmp_ptr2 = (int16 *)tmp_ptr;
while (l--) {
*(uint16* )(d_dst + READ_LE_UINT16(tmp_ptr2) * 2) = val & 0xffff;
tmp_ptr2++;
}
l = tmp_ptr[385];
val >>= 16;
tmp_ptr2 = (int16 *)(tmp_ptr + 128);
while (l--) {
*(uint16* )(d_dst + READ_LE_UINT16(tmp_ptr2) * 2) = val;
tmp_ptr2++;
}
} else if (code >= 0xF9) {
if (code == 0xFD) {
t = *_d_src++;
t = READ_LE_UINT16(_param6_7Ptr + t * 2);
t = ((t << 16) & 0xffff0000) | (t & 0xffff);
} else if (code == 0xFE) {
t = READ_LE_UINT16(_d_src);
t = ((t << 16) & 0xffff0000) | (t & 0xffff);
_d_src += 2;
} else if ((code == 0xF9) || (code == 0xFA) || (code == 0xFB) || (code == 0xFC)) {
t = READ_LE_UINT16(_paramPtr + code * 2);
t = ((t << 16) & 0xffff0000) | (t & 0xffff);
}
for (i = 0; i < 8; i++) {
*(uint32 *)(d_dst + 0) = t;
*(uint32 *)(d_dst + 4) = t;
*(uint32 *)(d_dst + 8) = t;
*(uint32 *)(d_dst + 12) = t;
d_dst += _d_pitch;
}
}
}
void Blocky16::decode2(byte *dst, const byte *src, int width, int height, const byte *param_ptr, const byte *param6_7_ptr) {
_d_src = src;
_paramPtr = param_ptr - 0xf9 - 0xf9;
_param6_7Ptr = param6_7_ptr;
int bw = (width + 7) / 8;
int bh = (height + 7) / 8;
int next_line = width * 2 * 7;
_d_pitch = width * 2;
do {
int tmp_bw = bw;
do {
level1(dst);
dst += 16;
} while (--tmp_bw);
dst += next_line;
} while (--bh);
}
void Blocky16::init(int width, int height) {
deinit();
_width = width;
_height = height;
makeTablesInterpolation(4);
makeTablesInterpolation(8);
_frameSize = _width * _height * 2;
_deltaSize = _frameSize * 3;
_deltaBuf = (byte *)malloc(_deltaSize);
_deltaBufs[0] = _deltaBuf;
_deltaBufs[1] = _deltaBuf + _frameSize;
_curBuf = _deltaBuf + _frameSize * 2;
}
Blocky16::Blocky16() {
_tableBig = (byte *)malloc(99328);
_tableSmall = (byte *)malloc(32768);
memset(_tableBig, 0, 99328);
memset(_tableSmall, 0, 32768);
_deltaBuf = NULL;
}
void Blocky16::deinit() {
_lastTableWidth = -1;
if (_deltaBuf) {
free(_deltaBuf);
_deltaSize = 0;
_deltaBuf = NULL;
_deltaBufs[0] = NULL;
_deltaBufs[1] = NULL;
}
}
Blocky16::~Blocky16() {
deinit();
if (_tableBig) {
free(_tableBig);
_tableBig = NULL;
}
if (_tableSmall) {
free(_tableSmall);
_tableSmall = NULL;
}
}
static int bomp_left;
static int bomp_num;
static int bomp_color;
static const byte *bomp_src;
static byte bompDecode() {
byte code, result;
const byte *src;
if (bomp_left == 2) {
src = bomp_src;
bomp_num = (*src >> 1) + 1;
code = *(src++) & 1;
bomp_src = src;
if (code != 0) {
bomp_left = 1;
bomp_color = *src++;
bomp_src = src;
} else {
bomp_left = 0;
}
} else {
src = bomp_src;
}
if (bomp_left != 0) {
if (bomp_left - 1 == 0) {
result = bomp_color;
} else {
result = 255;
}
} else {
result = *(src++);
bomp_src = src;
}
bomp_num--;
if (bomp_num == 0) {
bomp_left = 2;
}
return result;
}
static void bompInit(const byte *src) {
bomp_left = 2;
bomp_src = src;
}
static void bompDecodeMain(byte *dst, const byte *src, int size) {
bompInit(src);
while (size--) {
*dst++ = bompDecode();
}
}
void Blocky16::decode(byte *dst, const byte *src) {
_offset1 = ((_deltaBufs[1] - _curBuf) / 2) * 2;
_offset2 = ((_deltaBufs[0] - _curBuf) / 2) * 2;
int32 seq_nb = READ_LE_UINT16(src + 16);
const byte *gfx_data = src + 560;
if (seq_nb == 0) {
makeTables47(_width);
if (src[32] == src[33]) {
memset(_deltaBufs[0], src[32], _frameSize);
memset(_deltaBufs[1], src[32], _frameSize);
} else {
int count = _frameSize / 2;
byte *ptr1 = _deltaBufs[0];
byte *ptr2 = _deltaBufs[1];
uint16 val = READ_LE_UINT16(src + 32);
while (count--) {
*(uint16 *)(ptr1) = *(uint16 *)(ptr2) = val;
ptr1 += 2; ptr2 += 2;
};
}
_prevSeqNb = -1;
}
switch(src[18]) {
case 0:
memcpy(_curBuf, gfx_data, _frameSize);
break;
case 1:
error("codec47: not implemented decode1 proc");
break;
case 2:
if (seq_nb == _prevSeqNb + 1) {
decode2(_curBuf, gfx_data, _width, _height, src + 24, src + 40);
}
break;
case 3:
memcpy(_curBuf, _deltaBufs[1], _frameSize);
break;
case 4:
memcpy(_curBuf, _deltaBufs[0], _frameSize);
break;
case 5:
bompDecodeMain(_curBuf, gfx_data, READ_LE_UINT32(src + 36));
break;
case 6:
{
int count = _frameSize / 2;
byte *ptr = _curBuf;
while (count--) {
int offset = *gfx_data++ * 2;
*ptr++ = *(src + 40 + offset);
*ptr++ = *(src + 40 + offset + 1);
};
break;
}
case 7:
error("codec47: not implemented decode7 proc");
break;
case 8:
{
bompInit(gfx_data);
int count = _frameSize / 2;
byte *ptr = _curBuf;
while (count--) {
int offset = bompDecode() * 2;
*ptr++ = *(src + 40 + offset);
*ptr++ = *(src + 40 + offset + 1);
};
break;
}
}
memcpy(dst, _curBuf, _frameSize);
if (seq_nb == _prevSeqNb + 1) {
byte *tmp_ptr = NULL;
if (src[19] == 1) {
tmp_ptr = _curBuf;
_curBuf = _deltaBufs[1];
_deltaBufs[1] = tmp_ptr;
} else if (src[19] == 2) {
tmp_ptr = _deltaBufs[0];
_deltaBufs[0] = _deltaBufs[1];
_deltaBufs[1] = _curBuf;
_curBuf = tmp_ptr;
}
}
_prevSeqNb = seq_nb;
}
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