aboutsummaryrefslogtreecommitdiff
path: root/engines/cine/part.cpp
blob: d605bdd623693a00cc5eb60a33a47c63280ee17b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program 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 General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#include "common/endian.h"

#include "cine/cine.h"
#include "cine/unpack.h"
#include "cine/various.h"

namespace Cine {

uint16 numElementInPart;

PartBuffer *partBuffer;

void loadPart(const char *partName) {
	memset(partBuffer, 0, sizeof(PartBuffer) * NUM_MAX_PARTDATA);
	numElementInPart = 0;

	g_cine->_partFileHandle.close();

	checkDataDisk(-1);

	if (!g_cine->_partFileHandle.open(partName))
		error("loadPart(): Cannot open file %s", partName);

	setMouseCursor(MOUSE_CURSOR_DISK);

	numElementInPart = g_cine->_partFileHandle.readUint16BE();
	g_cine->_partFileHandle.readUint16BE(); // entry size

	if (currentPartName != partName)
		strcpy(currentPartName, partName);

	for (uint16 i = 0; i < numElementInPart; i++) {
		g_cine->_partFileHandle.read(partBuffer[i].partName, 14);
		partBuffer[i].offset = g_cine->_partFileHandle.readUint32BE();
		partBuffer[i].packedSize = g_cine->_partFileHandle.readUint32BE();
		partBuffer[i].unpackedSize = g_cine->_partFileHandle.readUint32BE();
		g_cine->_partFileHandle.readUint32BE(); // unused
	}

	if (g_cine->getGameType() == Cine::GType_FW && g_cine->getPlatform() == Common::kPlatformPC && strcmp(partName, "BASESON.SND") != 0)
		loadPal(partName);
}

void closePart(void) {
	// TODO
}

static Common::String fixVolCnfFileName(const uint8 *src, uint len) {
	assert(len == 11 || len == 13);
	// Copy source to a temporary buffer and force a trailing zero for string manipulation
	char tmp[14];
	memcpy(tmp, src, len);
	tmp[len] = 0;

	if (len == 11) {
		// Filenames of length 11 have no separation of the extension and the basename
		// so that's why we have to convert them first. There's no trailing zero in them
		// either and they're always of the full length 11 with padding spaces. Extension
		// can be always found at offset 8 onwards.
		// 
		// Examples of filename mappings:
		// "AEROPORTMSG" -> "AEROPORT.MSG"
		// "MITRAILLHP " -> "MITRAILL.HP" (Notice the trailing space after the extension)
		// "BOND10     " -> "BOND10"
		// "GIRL    SET" -> "GIRL.SET"

		// Replace all space characters with zeroes
		for (uint i = 0; i < len; i++)
			if (tmp[i] == ' ')
				tmp[i] = 0;
		// Extract the filename's extension
		Common::String extension(tmp + 8);
		tmp[8] = 0; // Force separation of extension and basename
		Common::String basename(tmp);
		if (extension.empty()) {
			return basename;
		} else {
			return basename + "." + extension;
		}
	} else {
		// Filenames of length 13 are okay as they are, no need for conversion
		return Common::String(tmp);
	}
}

void CineEngine::readVolCnf() {
	Common::File f;
	if (!f.open("vol.cnf")) {
		error("Unable to open 'vol.cnf'");
	}
	uint32 unpackedSize, packedSize;
	char hdr[8];
	f.read(hdr, 8);
	bool compressed = (memcmp(hdr, "ABASECP", 7) == 0);
	if (compressed) {
		unpackedSize = f.readUint32BE();
		packedSize = f.readUint32BE();
	} else {
		f.seek(0);
		unpackedSize = packedSize = f.size();
	}
	uint8 *buf = new uint8[unpackedSize];
	f.read(buf, packedSize);
	if (packedSize != unpackedSize) {
		CineUnpacker cineUnpacker;
		if (!cineUnpacker.unpack(buf, packedSize, buf, unpackedSize)) {
			error("Error while unpacking 'vol.cnf' data");
		}
	}
	uint8 *p = buf;
	int resourceFilesCount = READ_BE_UINT16(p); p += 2;
	int entrySize = READ_BE_UINT16(p); p += 2;
	for (int i = 0; i < resourceFilesCount; ++i) {
		char volumeResourceFile[9];
		memcpy(volumeResourceFile, p, 8);
		volumeResourceFile[8] = 0;
		_volumeResourceFiles.push_back(volumeResourceFile);
		p += entrySize;
	}

	// Check file name blocks' sizes
	bool fileNameLenMod11, fileNameLenMod13;
	fileNameLenMod11 = fileNameLenMod13 = true;
	for (int i = 0; i < resourceFilesCount; ++i) {
		int size = READ_BE_UINT32(p); p += 4;
		fileNameLenMod11 &= ((size % 11) == 0);
		fileNameLenMod13 &= ((size % 13) == 0);
		p += size;
	}
	// Make sure at least one of the candidates for file name length fits the data
	assert(fileNameLenMod11 || fileNameLenMod13);

	// File name length used to be deduced from the fact whether the file
	// was compressed or not. Compressed files used file name length 11,
	// uncompressed files used file name length 13. It worked almost always,
	// but not with the game entry that's detected as the Operation Stealth's
	// US Amiga release. It uses a compressed 'vol.cnf' file but still uses
	// file names of length 13. So we try to deduce the file name length from
	// the data in the 'vol.cnf' file.
	int fileNameLength; 
	if (fileNameLenMod11 != fileNameLenMod13) {
		// All file name blocks' sizes were divisible by either 11 or 13, but not with both.
		fileNameLength = (fileNameLenMod11 ? 11 : 13);
	} else {
		warning("Couldn't deduce file name length from data in 'vol.cnf', using a backup deduction scheme.");
		// Here we use the former file name length detection method
		// if we couldn't deduce the file name length from the data.
		fileNameLength = (compressed ? 11 : 13);
	}

	p = buf + 4 + resourceFilesCount * entrySize;
	for (int i = 0; i < resourceFilesCount; ++i) {
		int count = READ_BE_UINT32(p) / fileNameLength; p += 4;
		while (count--) {
			Common::String volumeEntryName = fixVolCnfFileName(p, fileNameLength);
			_volumeEntriesMap.setVal(volumeEntryName, _volumeResourceFiles[i].c_str());
			debugC(5, kCineDebugPart, "Added volume entry name '%s' resource file '%s'", volumeEntryName.c_str(), _volumeResourceFiles[i].c_str());
			p += fileNameLength;
		}
	}

	delete[] buf;
}

int16 findFileInBundle(const char *fileName) {
	if (g_cine->getGameType() == Cine::GType_OS) {
		// look first in currently loaded resource file
		for (int i = 0; i < numElementInPart; i++) {
			if (!scumm_stricmp(fileName, partBuffer[i].partName)) {
				return i;
			}
		}
		// not found, open the required resource file
		StringPtrHashMap::const_iterator it = g_cine->_volumeEntriesMap.find(fileName);
		if (it == g_cine->_volumeEntriesMap.end()) {
			warning("Unable to find part file for filename '%s'", fileName);
			return -1;
		}
		const char *part = (*it)._value;
		loadPart(part);
	}
	for (int i = 0; i < numElementInPart; i++) {
		if (!scumm_stricmp(fileName, partBuffer[i].partName)) {
			return i;
		}
	}
	return -1;
}

void readFromPart(int16 idx, byte *dataPtr) {
	setMouseCursor(MOUSE_CURSOR_DISK);

	g_cine->_partFileHandle.seek(partBuffer[idx].offset, SEEK_SET);
	g_cine->_partFileHandle.read(dataPtr, partBuffer[idx].packedSize);
}

byte *readBundleFile(int16 foundFileIdx) {
	assert(foundFileIdx >= 0 && foundFileIdx < numElementInPart);
	byte *dataPtr = (byte *)calloc(partBuffer[foundFileIdx].unpackedSize, 1);
	if (partBuffer[foundFileIdx].unpackedSize != partBuffer[foundFileIdx].packedSize) {
		byte *unpackBuffer = (byte *)malloc(partBuffer[foundFileIdx].packedSize);
		readFromPart(foundFileIdx, unpackBuffer);
		CineUnpacker cineUnpacker;
		if (!cineUnpacker.unpack(unpackBuffer, partBuffer[foundFileIdx].packedSize, dataPtr, partBuffer[foundFileIdx].unpackedSize)) {
			warning("Error unpacking '%s' from bundle file '%s'", partBuffer[foundFileIdx].partName, currentPartName);
		}
		free(unpackBuffer);
	} else {
		readFromPart(foundFileIdx, dataPtr);
	}

	return dataPtr;
}

byte *readBundleSoundFile(const char *entryName, uint32 *size) {
	int16 index;
	byte *data = 0;
	char previousPartName[15] = "";

	if (g_cine->getGameType() == Cine::GType_FW) {
		strcpy(previousPartName, currentPartName);
		loadPart("BASESON.SND");
	}
	index = findFileInBundle((const char *)entryName);
	if (index != -1) {
		data = readBundleFile(index);
		if (size) {
			*size = partBuffer[index].unpackedSize;
		}
	}
	if (g_cine->getGameType() == Cine::GType_FW) {
		loadPart(previousPartName);
	}
	return data;
}

/*! \brief Rotate byte value to the left by n bits */
byte rolByte(byte value, uint n) {
	n %= 8;
	return (byte) ((value << n) | (value >> (8 - n)));
}

byte *readFile(const char *filename, bool crypted) {
	Common::File in;

	in.open(filename);

	if (!in.isOpen())
		error("readFile(): Cannot open file %s", filename);

	uint32 size = in.size();

	byte *dataPtr = (byte *)malloc(size);
	in.read(dataPtr, size);

	// The Sony published CD version of Future Wars has its
	// AUTO00.PRC file's bytes rotated to the right by one.
	// So we decode the so called crypting by rotating all
	// the bytes to the left by one.
	if (crypted) {
		for (uint index = 0; index < size; index++) {
			dataPtr[index] = rolByte(dataPtr[index], 1);
		}
	}

	return dataPtr;
}

void checkDataDisk(int16 param) {
}

void dumpBundle(const char *fileName) {
	char tmpPart[15];

	strcpy(tmpPart, currentPartName);

	loadPart(fileName);
	for (int i = 0; i < numElementInPart; i++) {
		byte *data = readBundleFile(i);

		debug(0, "%s", partBuffer[i].partName);

		Common::DumpFile out;
		if (out.open(Common::String("dumps/") + partBuffer[i].partName)) {
			out.write(data, partBuffer[i].unpackedSize);
			out.close();
		}

		free(data);
	}

	loadPart(tmpPart);
}

} // End of namespace Cine