mirror of
https://github.com/libretro/scummvm.git
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112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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// RSC Resource file management module (SAGA 1, used in ITE)
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#include "saga/saga.h"
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#include "saga/resource.h"
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namespace Saga {
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#define ID_MIDI MKTAG('M','i','d','i')
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bool ResourceContext_RSC::loadMacMIDI() {
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// Sanity check
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if (_fileSize < RSC_MIN_FILESIZE + MAC_BINARY_HEADER_SIZE)
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return false;
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_file.seek(83);
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int macDataSize = _file.readSint32BE();
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int macResOffset = MAC_BINARY_HEADER_SIZE + (((macDataSize + 127) >> 7) << 7);
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_file.seek(macResOffset);
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uint32 macDataOffset = _file.readUint32BE() + macResOffset;
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uint32 macMapOffset = _file.readUint32BE() + macResOffset;
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_file.seek(macMapOffset + 22);
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_file.readUint16BE(); // resAttr
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int16 typeOffset = _file.readUint16BE();
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_file.readUint16BE(); // nameOffset
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uint16 numTypes = _file.readUint16BE() + 1;
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_file.seek(macMapOffset + typeOffset + 2);
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// Find the MIDI files
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for (uint16 i = 0; i < numTypes; i++) {
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uint32 id = _file.readUint32BE();
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uint16 items = _file.readUint16BE() + 1;
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uint16 offset = _file.readUint16BE();
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if (id == ID_MIDI) {
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for (uint16 curMidi = 0; curMidi < items; curMidi++) {
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// Jump to the header of the entry and read its fields
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_file.seek(offset + macMapOffset + typeOffset + curMidi * 12);
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uint16 midiID = _file.readUint16BE();
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_file.readUint16BE(); // nameOffset
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uint32 midiOffset = _file.readUint32BE() & 0xFFFFFF;
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_file.readUint32BE(); // macResSize
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// Jump to the actual data and read the file size
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_file.seek(macDataOffset + midiOffset);
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uint32 midiSize = _file.readUint32BE();
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// Add the entry
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if (_table.size() <= midiID)
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_table.resize(midiID + 1);
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_table[midiID].offset = macDataOffset + midiOffset + 4;
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_table[midiID].size = midiSize;
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}
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}
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}
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return true;
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}
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void ResourceContext_RSC::processPatches(Resource *resource, const GamePatchDescription *patchFiles) {
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const GamePatchDescription *patchDescription;
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ResourceData *resourceData;
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// Process external patch files
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for (patchDescription = patchFiles; patchDescription && patchDescription->fileName; ++patchDescription) {
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if ((patchDescription->fileType & _fileType) != 0) {
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if (patchDescription->resourceId < _table.size()) {
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resourceData = &_table[patchDescription->resourceId];
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// Check if we've already found a patch for this resource. One is enough.
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if (!resourceData->patchData) {
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resourceData->patchData = new PatchData(patchDescription->fileName);
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if (resourceData->patchData->_patchFile->open(patchDescription->fileName)) {
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resourceData->offset = 0;
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resourceData->size = resourceData->patchData->_patchFile->size();
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// The patched ITE file is in memory, so close the patch file
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resourceData->patchData->_patchFile->close();
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} else {
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delete resourceData->patchData;
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resourceData->patchData = NULL;
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}
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}
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}
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}
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}
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}
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} // End of namespace Saga
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