Mercurial > otakunoraifu
annotate music2/koedec.cc @ 18:4d7486cb20a9
Sync with upstream
| author | thib |
|---|---|
| date | Tue, 16 Sep 2008 15:30:03 +0000 |
| parents | 422f3cb3614b |
| children | c9e218c2c3f1 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright (c) 2004-2006 Kazunori "jagarl" Ueno | |
| 3 * All rights reserved. | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions | |
| 7 * are met: | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer in the | |
| 12 * documentation and/or other materials provided with the distribution. | |
| 13 * 3. The name of the author may not be used to endorse or promote products | |
| 14 * derived from this software without specific prior written permission. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
| 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
| 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
| 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #include<stdio.h> | |
| 29 #include<stdlib.h> | |
| 30 #include<string.h> | |
| 31 #include <vector> | |
| 32 #include <list> | |
| 33 #include <algorithm> | |
| 34 #include"music.h" | |
| 35 #include"system/file.h" | |
|
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36 #include"system/file_impl.h" |
| 0 | 37 |
| 38 using namespace std; | |
| 39 | |
| 40 /********************************************* | |
| 41 ** | |
| 42 ** FindKoe -- RealLiveの音声アーカイブ処理 | |
| 43 ** | |
| 44 */ | |
| 45 | |
| 46 /* 声ファイルのアーカイブ用のキャッシュ */ | |
| 47 #define koe_cache_size 7 | |
| 48 struct AvgKoeTable { | |
| 49 int koe_num; | |
| 50 int length; | |
| 51 int offset; | |
| 52 AvgKoeTable(int _num, int _len, int _off) : | |
| 53 koe_num(_num), length(_len), offset(_off) {} | |
| 54 bool operator <(int number) const { | |
| 55 return koe_num < number; | |
| 56 } | |
| 57 bool operator <(const AvgKoeTable& to) const { | |
| 58 return koe_num < to.koe_num; | |
| 59 } | |
| 60 bool operator ==(const AvgKoeTable& to) const { | |
| 61 return koe_num == to.koe_num; | |
| 62 } | |
| 63 bool operator ==(const int to) const { | |
| 64 return koe_num == to; | |
| 65 } | |
| 66 }; | |
| 67 struct AvgKoeHead { | |
| 68 FILE* stream; | |
| 69 int file_number; | |
| 70 int rate; | |
| 71 KoeType type; | |
| 72 vector<AvgKoeTable> table; | |
| 73 AvgKoeHead(FILE* stream, int file_number, KoeType type); | |
| 74 AvgKoeHead(const AvgKoeHead& from); | |
| 75 ~AvgKoeHead(); | |
| 76 AvgKoeTable* Find(int koe_num); | |
| 77 bool operator !=(int num) const { return file_number != num; } | |
| 78 bool operator ==(int num) const { return file_number == num; } | |
| 79 }; | |
| 80 struct AvgKoeCache { | |
| 81 list<AvgKoeHead> cache; | |
| 82 AvgKoeInfo Find(int file_number, int index); | |
| 83 }; | |
| 84 static AvgKoeCache koe_cache; | |
| 85 | |
| 86 AvgKoeInfo FindKoe(int file_number, int index) { | |
| 87 return koe_cache.Find(file_number, index); | |
| 88 }; | |
|
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89 extern int ogg_get_rate(FILE*); |
| 0 | 90 AvgKoeInfo AvgKoeCache::Find(int file_number, int index) { |
| 91 AvgKoeInfo info; | |
| 92 info.stream = 0; info.length = 0; info.offset = 0; | |
| 93 | |
| 94 list<AvgKoeHead>::iterator it; | |
| 95 it = find(cache.begin(), cache.end(), file_number); | |
| 96 if (it == cache.end()) { | |
| 97 /* 新たに head を作る */ | |
| 98 char fname[100]; | |
| 99 KoeType type = koe_unknown; | |
| 100 sprintf(fname, "z%03d.koe", file_number); | |
| 101 ARCINFO* arcinfo = file_searcher.Find(FILESEARCH::KOE,fname,".koe"); | |
| 102 if (arcinfo == 0) { | |
| 103 type = koe_nwk; | |
| 104 sprintf(fname, "z%04d.nwk", file_number); | |
| 105 arcinfo = file_searcher.Find(FILESEARCH::KOE,fname,".nwk"); | |
| 106 } | |
| 107 if (arcinfo == 0) { | |
| 108 type = koe_ovk; | |
| 109 sprintf(fname, "z%04d.ovk", file_number); | |
| 110 arcinfo = file_searcher.Find(FILESEARCH::KOE,fname,".ovk"); | |
| 111 } | |
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112 if (arcinfo == 0) { |
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113 DIRFILE* koedir = (DIRFILE*) file_searcher.MakeARCFILE((FILESEARCH::ARCTYPE)0, "koe"); |
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114 sprintf(fname, "%04d", file_number); |
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115 koedir = new DIRFILE(koedir->SearchFile(fname)); |
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116 sprintf(fname, "z%04d%05d.ogg", file_number, index); |
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117 arcinfo = koedir->Find(fname, ".ogg"); |
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118 delete koedir; |
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119 |
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120 if (arcinfo == 0) return info; |
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121 FILE* stream = arcinfo->OpenFile(); |
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122 info.rate = ogg_get_rate(stream); |
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123 fseek(stream, 0L, SEEK_END); |
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124 info.length = ftell(stream); |
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125 fseek(stream, 0L, SEEK_CUR); |
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126 info.type = koe_ogg; |
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127 info.stream = stream; |
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128 return info; |
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129 } |
| 0 | 130 if (arcinfo == 0) return info; |
| 131 FILE* stream = arcinfo->OpenFile(); | |
| 132 delete arcinfo; | |
| 133 if (stream == 0) return info; | |
| 134 cache.push_front(AvgKoeHead(stream, file_number, type)); | |
| 135 if (cache.size() >= koe_cache_size) cache.pop_back(); | |
| 136 it = cache.begin(); | |
| 137 } | |
| 138 if (it->file_number != file_number) return info; // 番号がおかしい | |
| 139 AvgKoeTable* table = it->Find(index); | |
| 140 if (table == 0) return info; // index が見付からない | |
| 141 // info を作成する | |
| 142 info.length = table->length; | |
| 143 info.offset = table->offset; | |
| 144 info.rate = it->rate; | |
| 145 info.type = it->type; | |
| 146 int new_fd = dup(fileno(it->stream)); | |
| 147 if (new_fd == -1) info.stream = 0; | |
| 148 else info.stream = fdopen(new_fd, "rb"); | |
| 149 return info; | |
| 150 } | |
| 151 | |
| 152 AvgKoeHead::AvgKoeHead(const AvgKoeHead& from) { | |
| 153 if (from.stream) { | |
| 154 int new_fd = dup(fileno(from.stream)); | |
| 155 if (new_fd == -1) stream = 0; | |
| 156 else stream = fdopen(new_fd, "rb"); | |
| 157 } | |
| 158 file_number = from.file_number; | |
| 159 rate = from.rate; | |
| 160 table = from.table; | |
| 161 type = from.type; | |
| 162 } | |
|
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163 |
| 0 | 164 AvgKoeHead::AvgKoeHead(FILE* _s, int _file_number, KoeType _type) { |
| 165 char head[0x20]; | |
| 166 stream = _s; file_number = _file_number; | |
| 167 int offset = ftell(stream); | |
| 168 rate = 22050; | |
| 169 type = _type; | |
| 170 if (stream == 0) return; | |
| 171 /* header 読み込み */ | |
| 172 if (type == koe_nwk) { // 新しい形式 : .nwk file | |
| 173 rate = 44100; | |
| 174 fread(head, 4, 1, stream); | |
| 175 int table_len = read_little_endian_int(head); | |
| 176 table.reserve(table_len); | |
| 177 int i; | |
| 178 for (i=0; i<table_len; i++) { | |
| 179 fread(head, 12, 1, stream); | |
| 180 int sz = read_little_endian_int(head); | |
| 181 int off = read_little_endian_int(head+4); | |
| 182 int cnt = read_little_endian_int(head+8); | |
| 183 table.push_back(AvgKoeTable(cnt, sz, off)); | |
| 184 } | |
| 185 } else if (type == koe_ovk) { // Little Busters! : .ovk file | |
| 186 rate = 44100; | |
| 187 fread(head, 4, 1, stream); | |
| 188 int table_len = read_little_endian_int(head); | |
| 189 table.reserve(table_len); | |
| 190 int i; | |
| 191 for (i=0; i<table_len; i++) { | |
| 192 fread(head, 16, 1, stream); | |
| 193 int sz = read_little_endian_int(head); | |
| 194 int off = read_little_endian_int(head+4); | |
| 195 int cnt = read_little_endian_int(head+8); | |
| 196 table.push_back(AvgKoeTable(cnt, sz, off)); | |
| 197 } | |
| 198 } else { // .koe file | |
| 199 fread(head, 0x20, 1, stream); | |
| 200 if (strncmp(head, "KOEPAC", 7) != 0) { // invalid header | |
| 201 stream = 0; | |
| 202 return; | |
| 203 } | |
| 204 int table_len = read_little_endian_int(head+0x10); | |
| 205 rate = read_little_endian_int(head+0x18); | |
| 206 if (rate == 0) rate = 22050; | |
| 207 /* table 読み込み */ | |
| 208 table.reserve(table_len); | |
| 209 char* buf = new char[table_len*8]; | |
| 210 fread(buf, table_len, 8, stream); | |
| 211 int i; for (i=0; i<table_len; i++) { | |
| 212 int cnt = read_little_endian_short(buf+i*8); | |
| 213 int sz = read_little_endian_short(buf+i*8+2); | |
| 214 int off = read_little_endian_int(buf+i*8+4); | |
| 215 table.push_back(AvgKoeTable(cnt, sz, off)); | |
| 216 } | |
| 217 } | |
| 218 sort(table.begin(), table.end()); | |
| 219 } | |
| 220 | |
| 221 AvgKoeHead::~AvgKoeHead(void) { | |
| 222 if (stream) fclose(stream); | |
| 223 stream = 0; | |
| 224 } | |
| 225 AvgKoeTable* AvgKoeHead::Find(int koe_num) { | |
| 226 if (table.empty()) return 0; | |
| 227 vector<AvgKoeTable>::iterator it; | |
| 228 it = lower_bound(table.begin(), table.end(), koe_num); | |
| 229 if (it == table.end() || it->koe_num != koe_num) return 0; | |
| 230 return &table[it-table.begin()]; | |
| 231 } | |
| 232 | |
| 233 /********************************************* | |
| 234 ** | |
| 235 ** MakeWavHeader : koe ファイルに wave header を付ける | |
| 236 ** | |
| 237 */ | |
| 238 | |
| 239 static unsigned char orig_header[0x2c] = { | |
| 240 0x52, 0x49, 0x46, 0x46, /* +00 "RIFF" */ | |
| 241 0x00, 0x00, 0x00, 0x00, /* +04 file size - 8 */ | |
| 242 0x57, 0x41, 0x56, 0x45, 0x66, 0x6d, 0x74, 0x20, /* +08 "WAVEfmt " */ | |
| 243 0x10, 0x00, 0x00, 0x00, /* +10 fmt size */ | |
| 244 0x01, 0x00, /* +14 wFormatTag */ | |
| 245 0x02, 0x00, /* +16 Channels */ | |
| 246 0x44, 0xac, 0x00, 0x00, /* +18 rate */ | |
| 247 0x10, 0xb1, 0x02, 0x00, /* +1c BytesPerSec = rate * BlockAlign */ | |
| 248 0x04, 0x00, /* +20 BlockAlign = channels*BytesPerSample */ | |
| 249 0x10, 0x00, /* +22 BitsPerSample */ | |
| 250 0x64, 0x61, 0x74, 0x61, /* +24 "data" */ | |
| 251 0x00, 0x00, 0x00, 0x00 /* +28 filesize - 0x2c */ | |
| 252 }; | |
| 253 | |
| 254 const char* MakeWavHeader(int rate, int ch, int bps, int size) { | |
| 255 static char header[0x2c]; | |
| 256 memcpy(header, (const char*)orig_header, 0x2c); | |
| 257 write_little_endian_int(header+0x04, size-8); | |
| 258 write_little_endian_int(header+0x28, size-0x2c); | |
| 259 write_little_endian_int(header+0x18, rate); | |
| 260 write_little_endian_int(header+0x1c, rate*ch*bps); | |
| 261 header[0x16] = ch; | |
| 262 header[0x20] = ch*bps; | |
| 263 header[0x22] = bps*8; | |
| 264 return header; | |
| 265 } | |
| 266 | |
| 267 /********************************************* | |
| 268 ** | |
| 269 ** decode_koe -- 音声データ展開 | |
| 270 ** | |
| 271 */ | |
| 272 | |
| 273 extern char* decode_koe(AvgKoeInfo info, int* len); | |
| 274 | |
| 275 /* 8bit -> 16bit への変換テーブル。本来は signed short だが | |
| 276 ** とりあえず unsigned で扱っている | |
| 277 */ | |
| 278 | |
| 279 unsigned short koe_8bit_trans_tbl[256] = { | |
| 280 0x8000,0x81ff,0x83f9,0x85ef,0x87e1,0x89cf,0x8bb9,0x8d9f, | |
| 281 0x8f81,0x915f,0x9339,0x950f,0x96e1,0x98af,0x9a79,0x9c3f, | |
| 282 0x9e01,0x9fbf,0xa179,0xa32f,0xa4e1,0xa68f,0xa839,0xa9df, | |
| 283 0xab81,0xad1f,0xaeb9,0xb04f,0xb1e1,0xb36f,0xb4f9,0xb67f, | |
| 284 0xb801,0xb97f,0xbaf9,0xbc6f,0xbde1,0xbf4f,0xc0b9,0xc21f, | |
| 285 0xc381,0xc4df,0xc639,0xc78f,0xc8e1,0xca2f,0xcb79,0xccbf, | |
| 286 0xce01,0xcf3f,0xd079,0xd1af,0xd2e1,0xd40f,0xd539,0xd65f, | |
| 287 0xd781,0xd89f,0xd9b9,0xdacf,0xdbe1,0xdcef,0xddf9,0xdeff, | |
| 288 0xe001,0xe0ff,0xe1f9,0xe2ef,0xe3e1,0xe4cf,0xe5b9,0xe69f, | |
| 289 0xe781,0xe85f,0xe939,0xea0f,0xeae1,0xebaf,0xec79,0xed3f, | |
| 290 0xee01,0xeebf,0xef79,0xf02f,0xf0e1,0xf18f,0xf239,0xf2df, | |
| 291 0xf381,0xf41f,0xf4b9,0xf54f,0xf5e1,0xf66f,0xf6f9,0xf77f, | |
| 292 0xf801,0xf87f,0xf8f9,0xf96f,0xf9e1,0xfa4f,0xfab9,0xfb1f, | |
| 293 0xfb81,0xfbdf,0xfc39,0xfc8f,0xfce1,0xfd2f,0xfd79,0xfdbf, | |
| 294 0xfe01,0xfe3f,0xfe79,0xfeaf,0xfee1,0xff0f,0xff39,0xff5f, | |
| 295 0xff81,0xff9f,0xffb9,0xffcf,0xffe1,0xffef,0xfff9,0xffff, | |
| 296 0x0000,0x0001,0x0007,0x0011,0x001f,0x0031,0x0047,0x0061, | |
| 297 0x007f,0x00a1,0x00c7,0x00f1,0x011f,0x0151,0x0187,0x01c1, | |
| 298 0x01ff,0x0241,0x0287,0x02d1,0x031f,0x0371,0x03c7,0x0421, | |
| 299 0x047f,0x04e1,0x0547,0x05b1,0x061f,0x0691,0x0707,0x0781, | |
| 300 0x07ff,0x0881,0x0907,0x0991,0x0a1f,0x0ab1,0x0b47,0x0be1, | |
| 301 0x0c7f,0x0d21,0x0dc7,0x0e71,0x0f1f,0x0fd1,0x1087,0x1141, | |
| 302 0x11ff,0x12c1,0x1387,0x1451,0x151f,0x15f1,0x16c7,0x17a1, | |
| 303 0x187f,0x1961,0x1a47,0x1b31,0x1c1f,0x1d11,0x1e07,0x1f01, | |
| 304 0x1fff,0x2101,0x2207,0x2311,0x241f,0x2531,0x2647,0x2761, | |
| 305 0x287f,0x29a1,0x2ac7,0x2bf1,0x2d1f,0x2e51,0x2f87,0x30c1, | |
| 306 0x31ff,0x3341,0x3487,0x35d1,0x371f,0x3871,0x39c7,0x3b21, | |
| 307 0x3c7f,0x3de1,0x3f47,0x40b1,0x421f,0x4391,0x4507,0x4681, | |
| 308 0x47ff,0x4981,0x4b07,0x4c91,0x4e1f,0x4fb1,0x5147,0x52e1, | |
| 309 0x547f,0x5621,0x57c7,0x5971,0x5b1f,0x5cd1,0x5e87,0x6041, | |
| 310 0x61ff,0x63c1,0x6587,0x6751,0x691f,0x6af1,0x6cc7,0x6ea1, | |
| 311 0x707f,0x7261,0x7447,0x7631,0x781f,0x7a11,0x7c07,0x7fff | |
| 312 }; | |
| 313 | |
| 314 /* ADPCM・・・じゃないらしい。ただのDPCMのナめたテーブル。 | |
| 315 ** 自動生成すりゃいいんだけど256byteだったら | |
| 316 ** テーブルでも問題ないでしょ | |
| 317 */ | |
| 318 | |
| 319 char koe_ad_trans_tbl[256] = { | |
| 320 0x00,0xff,0x01,0xfe,0x02,0xfd,0x03,0xfc,0x04,0xfb,0x05,0xfa,0x06,0xf9,0x07,0xf8, | |
| 321 0x08,0xf7,0x09,0xf6,0x0a,0xf5,0x0b,0xf4,0x0c,0xf3,0x0d,0xf2,0x0e,0xf1,0x0f,0xf0, | |
| 322 0x10,0xef,0x11,0xee,0x12,0xed,0x13,0xec,0x14,0xeb,0x15,0xea,0x16,0xe9,0x17,0xe8, | |
| 323 0x18,0xe7,0x19,0xe6,0x1a,0xe5,0x1b,0xe4,0x1c,0xe3,0x1d,0xe2,0x1e,0xe1,0x1f,0xe0, | |
| 324 0x20,0xdf,0x21,0xde,0x22,0xdd,0x23,0xdc,0x24,0xdb,0x25,0xda,0x26,0xd9,0x27,0xd8, | |
| 325 0x28,0xd7,0x29,0xd6,0x2a,0xd5,0x2b,0xd4,0x2c,0xd3,0x2d,0xd2,0x2e,0xd1,0x2f,0xd0, | |
| 326 0x30,0xcf,0x31,0xce,0x32,0xcd,0x33,0xcc,0x34,0xcb,0x35,0xca,0x36,0xc9,0x37,0xc8, | |
| 327 0x38,0xc7,0x39,0xc6,0x3a,0xc5,0x3b,0xc4,0x3c,0xc3,0x3d,0xc2,0x3e,0xc1,0x3f,0xc0, | |
| 328 0x40,0xbf,0x41,0xbe,0x42,0xbd,0x43,0xbc,0x44,0xbb,0x45,0xba,0x46,0xb9,0x47,0xb8, | |
| 329 0x48,0xb7,0x49,0xb6,0x4a,0xb5,0x4b,0xb4,0x4c,0xb3,0x4d,0xb2,0x4e,0xb1,0x4f,0xb0, | |
| 330 0x50,0xaf,0x51,0xae,0x52,0xad,0x53,0xac,0x54,0xab,0x55,0xaa,0x56,0xa9,0x57,0xa8, | |
| 331 0x58,0xa7,0x59,0xa6,0x5a,0xa5,0x5b,0xa4,0x5c,0xa3,0x5d,0xa2,0x5e,0xa1,0x5f,0xa0, | |
| 332 0x60,0x9f,0x61,0x9e,0x62,0x9d,0x63,0x9c,0x64,0x9b,0x65,0x9a,0x66,0x99,0x67,0x98, | |
| 333 0x68,0x97,0x69,0x96,0x6a,0x95,0x6b,0x94,0x6c,0x93,0x6d,0x92,0x6e,0x91,0x6f,0x90, | |
| 334 0x70,0x8f,0x71,0x8e,0x72,0x8d,0x73,0x8c,0x74,0x8b,0x75,0x8a,0x76,0x89,0x77,0x88, | |
| 335 0x78,0x87,0x79,0x86,0x7a,0x85,0x7b,0x84,0x7c,0x83,0x7d,0x82,0x7e,0x81,0x7f,0x80 | |
| 336 }; | |
| 337 | |
| 338 extern int is_koe_ogg(char* head); | |
| 339 extern char* decode_koe_ogg(AvgKoeInfo info, int* dest_len); | |
| 340 | |
| 341 char* decode_koe(AvgKoeInfo info, int* dest_len) { | |
| 342 char buf[1024]; char* table; | |
| 343 unsigned char* src_orig, *src; | |
| 344 unsigned short* dest_orig, *dest; | |
| 345 int all_len; int i,j; | |
| 346 if (info.stream == NULL) { | |
| 347 return NULL; | |
| 348 } | |
| 349 fseek(info.stream, info.offset, 0); | |
| 350 if (info.type == koe_nwk) { | |
| 351 return decode_koe_nwa(info, dest_len); | |
| 352 } | |
| 353 fread(buf, 1, 0x20, info.stream); | |
| 354 if (is_koe_ogg(buf)) { | |
| 355 fseek(info.stream, -20, 1); | |
| 356 return decode_koe_ogg(info, dest_len); | |
| 357 } | |
| 358 /* avg32 の声データ展開 */ | |
| 359 table = (char*)malloc(info.length*2); | |
| 360 fseek(info.stream, info.offset, 0); | |
| 361 fread(table, 2, info.length, info.stream); | |
| 362 | |
| 363 all_len = 0; | |
| 364 for (i=0; i<info.length; i++) | |
| 365 all_len += read_little_endian_short(table + i*2); | |
| 366 /* データ読み込み */ | |
| 367 src_orig = (unsigned char*) malloc(all_len); | |
| 368 dest_orig = (unsigned short*)malloc(info.length * 0x1000 + 0x2c); | |
| 369 if (src_orig == NULL || dest_orig == NULL) return NULL; | |
| 370 src = src_orig; | |
| 371 fread(src, 1, all_len, info.stream); | |
| 372 *dest_len = info.length * 0x400 * 4; | |
| 373 const char* header = MakeWavHeader(info.rate, 2, 2, *dest_len); | |
| 374 memcpy(dest_orig, header, 0x2c); | |
| 375 dest = dest_orig + 0x2c; | |
| 376 /* memset(dest_data, 0, table_len * 0x1000); */ | |
| 377 | |
| 378 /* 展開 */ | |
| 379 for (i=0; i<info.length; i++) { | |
| 380 int slen = read_little_endian_short(table+i*2); | |
| 381 if (slen == 0) { // do nothing | |
| 382 memset(dest, 0, 0x1000); | |
| 383 dest += 0x800; src += 0; | |
| 384 } else if (slen == 0x400) { // table 変換 | |
| 385 for (j=0; j<0x400; j++) { | |
| 386 write_little_endian_short((char*)(dest+0), koe_8bit_trans_tbl[*src]); | |
| 387 write_little_endian_short((char*)(dest+1), koe_8bit_trans_tbl[*src]); | |
| 388 dest += 2; src++; | |
| 389 } | |
| 390 } else { // DPCM | |
| 391 char d = 0; short o2; | |
| 392 int k,j; for (j=0, k=0; j<slen && k < 0x800; j++) { | |
| 393 unsigned char s = src[j]; | |
| 394 if ( (s+1) & 0x0f) { | |
| 395 d -= koe_ad_trans_tbl[s & 0x0f]; | |
| 396 } else { | |
| 397 unsigned char s2; | |
| 398 s >>= 4; s &= 0x0f; s2 = s; | |
| 399 s = src[++j]; s2 |= (s<<4) & 0xf0; | |
| 400 d -= koe_ad_trans_tbl[s2]; | |
| 401 } | |
| 402 o2 = koe_8bit_trans_tbl[ (unsigned char)d]; | |
| 403 write_little_endian_short((char*)(dest+k), o2); | |
| 404 write_little_endian_short((char*)(dest+k+1), o2); | |
| 405 k+=2; | |
| 406 s >>= 4; | |
| 407 if ((s+1) & 0x0f) { | |
| 408 d -= koe_ad_trans_tbl[s & 0x0f]; | |
| 409 } else { | |
| 410 d -= koe_ad_trans_tbl[ src[++j] ]; | |
| 411 } | |
| 412 o2 = koe_8bit_trans_tbl[ (unsigned char)d]; | |
| 413 write_little_endian_short((char*)(dest+k), o2); | |
| 414 write_little_endian_short((char*)(dest+k+1), o2); | |
| 415 k+=2; | |
| 416 } | |
| 417 dest += 0x800; src += slen; | |
| 418 } | |
| 419 } | |
| 420 free( (void*) table); | |
| 421 free( (void*) src_orig); | |
| 422 return (char*)dest_orig; | |
| 423 } | |
| 424 | |
| 425 |