bool PEResources::loadFromEXE(File *stream) {
clear();
if (!stream)
return false;
if (stream->readUint16BE() != MKTAG16('M', 'Z'))
return false;
stream->skip(58);
uint32 peOffset = stream->readUint32LE();
if (!peOffset || peOffset >= (uint32)stream->size())
return false;
stream->seek(peOffset);
if (stream->readUint32BE() != MKTAG('P','E',0,0))
return false;
stream->skip(2);
uint16 sectionCount = stream->readUint16LE();
stream->skip(12);
uint16 optionalHeaderSize = stream->readUint16LE();
stream->skip(optionalHeaderSize + 2);
// Read in all the sections
for (uint16 i = 0; i < sectionCount; i++) {
char sectionName[9];
stream->read(sectionName, 8);
sectionName[8] = 0;
Section section;
stream->skip(4);
section.virtualAddress = stream->readUint32LE();
section.size = stream->readUint32LE();
section.offset = stream->readUint32LE();
stream->skip(16);
_sections[sectionName] = section;
}
// Currently, we require loading a resource section
if (!_sections.contains(".rsrc")) {
clear();
return false;
}
_exe = stream;
Section &resSection = _sections[".rsrc"];
parseResourceLevel(resSection, resSection.offset, 0);
return true;
}
void AVIDecoder::readNextPacket() {
uint32 nextTag = _fileStream->readUint32BE();
uint32 size = _fileStream->readUint32LE();
if (_fileStream->eos())
return;
if (nextTag == ID_LIST) {
// A list of audio/video chunks
int32 startPos = _fileStream->pos();
if (_fileStream->readUint32BE() != ID_REC)
error("Expected 'rec ' LIST");
size -= 4; // subtract list type
// Decode chunks in the list
while (_fileStream->pos() < startPos + (int32)size)
readNextPacket();
return;
} else if (nextTag == ID_JUNK || nextTag == ID_IDX1) {
skipChunk(size);
return;
}
Track *track = getTrack(getStreamIndex(nextTag));
if (!track)
error("Cannot get track from tag '%s'", tag2str(nextTag));
Common::SeekableReadStream *chunk = 0;
if (size != 0) {
chunk = _fileStream->readStream(size);
_fileStream->skip(size & 1);
}
if (track->getTrackType() == Track::kTrackTypeAudio) {
if (getStreamType(nextTag) != MKTAG16('w', 'b'))
error("Invalid audio track tag '%s'", tag2str(nextTag));
assert(chunk);
((AVIAudioTrack *)track)->queueSound(chunk);
} else {
AVIVideoTrack *videoTrack = (AVIVideoTrack *)track;
if (getStreamType(nextTag) == MKTAG16('p', 'c')) {
// Palette Change
assert(chunk);
byte firstEntry = chunk->readByte();
uint16 numEntries = chunk->readByte();
chunk->readUint16LE(); // Reserved
// 0 entries means all colors are going to be changed
if (numEntries == 0)
numEntries = 256;
byte *palette = const_cast<byte *>(videoTrack->getPalette());
for (uint16 i = firstEntry; i < numEntries + firstEntry; i++) {
palette[i * 3] = chunk->readByte();
palette[i * 3 + 1] = chunk->readByte();
palette[i * 3 + 2] = chunk->readByte();
chunk->readByte(); // Flags that don't serve us any purpose
}
delete chunk;
videoTrack->markPaletteDirty();
} else if (getStreamType(nextTag) == MKTAG16('d', 'b')) {
// TODO: Check if this really is uncompressed. Many videos
// falsely put compressed data in here.
error("Uncompressed AVI frame found");
} else {
// Otherwise, assume it's a compressed frame
videoTrack->decodeFrame(chunk);
}
}
}
