C++ File::readUint32LE方法代码示例

/**
 * Opens a file and loads a sound effect.
 *
 * @param fileName         Sfx filename
 *
 * @returns                True is everything is OK, False otherwise
 */
bool FPSfx::loadFile(const char *fileName) {
	if (!_soundSupported)
		return true;

	SoundCodecs codec = FPCODEC_UNKNOWN;

	Common::File file;
	if (file.open(fileName))
		codec = FPCODEC_ADPCM;
	else if (file.open(setExtension(fileName, ".MP3")))
		codec = FPCODEC_MP3;
	else if (file.open(setExtension(fileName, ".OGG")))
		codec = FPCODEC_OGG;
	else if (file.open(setExtension(fileName, ".FLA")))
		codec = FPCODEC_FLAC;
	else {
		warning("FPSfx::LoadFile(): Cannot open sfx file!");
		return false;
	}

	Common::SeekableReadStream *buffer;
	switch (codec) {
	case FPCODEC_ADPCM: {
		if (file.readUint32BE() != MKTAG('A', 'D', 'P', 0x10)) {
			warning("FPSfx::LoadFile(): Invalid ADP header!");
			return false;
		}

		uint32 rate = file.readUint32LE();
		uint32 channels = file.readUint32LE();

		buffer = file.readStream(file.size() - file.pos());
		_rewindableStream = Audio::makeADPCMStream(buffer, DisposeAfterUse::YES, 0, Audio::kADPCMDVI, rate, channels);
		}
		break;
	case FPCODEC_MP3:
#ifdef USE_MAD
		buffer = file.readStream(file.size());
		_rewindableStream = Audio::makeMP3Stream(buffer, DisposeAfterUse::YES);
#endif
		break;
	case FPCODEC_OGG:
#ifdef USE_VORBIS
		buffer = file.readStream(file.size());
		_rewindableStream = Audio::makeVorbisStream(buffer, DisposeAfterUse::YES);
#endif
		break;
	case FPCODEC_FLAC:
		buffer = file.readStream(file.size());
#ifdef USE_FLAC
		_rewindableStream = Audio::makeFLACStream(buffer, DisposeAfterUse::YES);
#endif
		break;
	default:
		return false;
	}

	_fileLoaded = true;
	return true;
}

void BIFFile::load() {
	Common::File bif;
	open(bif);

	readHeader(bif);

	if (_id != kBIFID)
		throw Common::Exception("Not a BIF file");

	if ((_version != kVersion1) && (_version != kVersion11))
		throw Common::Exception("Unsupported BIF file version %08X", _version);

	uint32 varResCount = bif.readUint32LE();
	uint32 fixResCount = bif.readUint32LE();

	if (fixResCount != 0)
		throw Common::Exception("TODO: Fixed BIF resources");

	_iResources.resize(varResCount);

	uint32 offVarResTable = bif.readUint32LE();

	try {

		readVarResTable(bif, offVarResTable);

		if (bif.err())
			throw Common::Exception(Common::kReadError);

	} catch (Common::Exception &e) {
		e.add("Failed reading BIF file");
		throw e;
	}

}

void MoviePlayerDXA::readSoundData(Common::SeekableReadStream *stream) {
	uint32 tag = stream->readUint32BE();

	if (tag == MKTAG('W','A','V','E')) {
		uint32 size = stream->readUint32BE();

		if (_sequenceNum) {
			Common::File in;

			stream->skip(size);

			in.open("audio.wav");
			if (!in.isOpen()) {
				error("Can't read offset file 'audio.wav'");
			}

			in.seek(_sequenceNum * 8, SEEK_SET);
			uint32 offset = in.readUint32LE();
			size = in.readUint32LE();

			in.seek(offset, SEEK_SET);
			_bgSoundStream = Audio::makeWAVStream(in.readStream(size), DisposeAfterUse::YES);
			in.close();
		} else {
			_bgSoundStream = Audio::makeWAVStream(stream->readStream(size), DisposeAfterUse::YES);
		}
	} else {
		_bgSoundStream = Audio::SeekableAudioStream::openStreamFile(baseName);
	}
}

void writeParrotLobbyLinkUpdaterEntries() {
	static const int OFFSETS[3] = { 0x5A5B38, 0x5A5320, 0x5A4360 };
	static const int COUNTS[5] = { 7, 5, 6, 9, 1 };
	static const int SKIP[5] = { 36, 36, 40, 36, 0 };
	uint recordOffset = OFFSETS[_version], linkOffset;
	byte vals[8];

	outputFile.seek(dataOffset);

	for (int groupNum = 0; groupNum < 4; ++groupNum) {
		for (int entryNum = 0; entryNum < COUNTS[groupNum];
				++entryNum, recordOffset += 36) {
			inputFile.seek(recordOffset - FILE_DIFF[_version]);
			linkOffset = inputFile.readUint32LE();
			for (int idx = 0; idx < 8; ++idx)
				vals[idx] = inputFile.readUint32LE();

			// Write out the entry
			inputFile.seek(linkOffset - FILE_DIFF[_version]);
			outputFile.writeString(inputFile);
			outputFile.write(vals, 8);
		}

		// Skip space between groups
		recordOffset += SKIP[groupNum];
	}

	uint size = outputFile.size() - dataOffset;
	writeEntryHeader("DATA/PARROT_LOBBY_LINK_UPDATOR", dataOffset, size);
	dataOffset += size;
}

void NDSFile::load() {
	Common::File nds;
	open(nds);

	if (!isNDS(nds))
		throw Common::Exception("Not a support NDS ROM file");

	nds.seek(0x40);

	uint32 fileNameTableOffset = nds.readUint32LE();
	uint32 fileNameTableLength = nds.readUint32LE();
	uint32 fatOffset           = nds.readUint32LE();
	//uint32 fatLength = nds.readUint32LE();

	try {

		readNames(nds, fileNameTableOffset, fileNameTableLength);
		readFAT(nds, fatOffset);

	if (nds.err())
		throw Common::Exception(Common::kReadError);

	} catch (Common::Exception &e) {
		e.add("Failed reading NDS file");
		throw;
	}

}

bool XARCArchive::open(const Common::String &filename) {
	Common::File stream;
	if (!stream.open(filename)) {
		return false;
	}

	_filename = filename;

	// Unknown: always 1? version?
	uint32 unknown = stream.readUint32LE();
	debugC(kDebugUnknown, "Stark::XARC: \"%s\" has unknown=%d", _filename.c_str(), unknown);
	if (unknown != 1) {
		warning("Stark::XARC: \"%s\" has unknown=%d with unknown meaning", _filename.c_str(), unknown);
	}

	// Read the number of contained files
	uint32 numFiles = stream.readUint32LE();
	debugC(20, kDebugArchive, "Stark::XARC: \"%s\" contains %d files", _filename.c_str(), numFiles);

	// Read the offset to the contents of the first file
	uint32 offset = stream.readUint32LE();
	debugC(20, kDebugArchive, "Stark::XARC: \"%s\"'s first file has offset=%d", _filename.c_str(), offset);

	for (uint32 i = 0; i < numFiles; i++) {
		XARCMember *member = new XARCMember(this, stream, offset);
		_members.push_back(Common::ArchiveMemberPtr(member));

		// Set the offset to the next member
		offset += member->getLength();
	}

	return true;
}

void writeSoundNames(const char *sourceFilename, Common::File &target, uint offset) {
	Common::File source;
	if (!source.open(sourceFilename)) {
		error("Unable to open '%s'", sourceFilename);
	}

	source.seek(offset);

	// Count the sounds
	uint count = 0;
	while (1) {
		uint32 id = source.readUint32LE();

		if (!id)
			break;

		source.skip(32);
		count++;
	}

	target.writeLong(count);

	source.seek(offset);
	for (uint i = 0; i < count; i++) {
		uint32 id = source.readUint32LE();
		char name[32];
		source.read(name, sizeof(name));

		target.writeLong(id);
		target.write(name, sizeof(name));
	}

	source.close();
}

void MoviePlayerDXA::startSound() {
	uint32 offset, size;

	if (getSoundTag() == MKID_BE('WAVE')) {
		size = _fileStream->readUint32BE();

		if (_sequenceNum) {
			Common::File in;

			_fileStream->seek(size, SEEK_CUR);

			in.open((const char *)"audio.wav");
			if (!in.isOpen()) {
				error("Can't read offset file 'audio.wav'");
			}

			in.seek(_sequenceNum * 8, SEEK_SET);
			offset = in.readUint32LE();
			size = in.readUint32LE();

			in.seek(offset, SEEK_SET);
			_bgSoundStream = Audio::makeWAVStream(in.readStream(size), DisposeAfterUse::YES);
			in.close();
		} else {
			_bgSoundStream = Audio::makeWAVStream(_fileStream->readStream(size), DisposeAfterUse::YES);
		}
	} else {
		_bgSoundStream = Audio::SeekableAudioStream::openStreamFile(baseName);
	}

	if (_bgSoundStream != NULL) {
		_vm->_mixer->stopHandle(_bgSound);
		_vm->_mixer->playStream(Audio::Mixer::kSFXSoundType, &_bgSound, _bgSoundStream);
	}
}

void SoundHE::setupHEMusicFile() {
	int i, total_size;
	Common::File musicFile;
	Common::String buf(_vm->generateFilename(-4));

	if (musicFile.open(buf) == true) {
		musicFile.seek(4, SEEK_SET);
		total_size = musicFile.readUint32BE();
		musicFile.seek(16, SEEK_SET);
		_heMusicTracks = musicFile.readUint32LE();
		debug(5, "Total music tracks %d", _heMusicTracks);

		int musicStart = (_vm->_game.heversion >= 80) ? 56 : 20;
		musicFile.seek(musicStart, SEEK_SET);

		_heMusic = (HEMusic *)malloc((_heMusicTracks + 1) * sizeof(HEMusic));
		for (i = 0; i < _heMusicTracks; i++) {
			_heMusic[i].id = musicFile.readUint32LE();
			_heMusic[i].offset = musicFile.readUint32LE();
			_heMusic[i].size = musicFile.readUint32LE();

			if (_vm->_game.heversion >= 80) {
				musicFile.seek(+9, SEEK_CUR);
			} else {
				musicFile.seek(+13, SEEK_CUR);
			}
		}

		musicFile.close();
	}
}

Common::SeekableReadStream *Hqr::createReadStreamForIndex(int index) const {
	if (index >= _numIndices)
		return 0;

	uint32 realSize;
	uint32 compressedSize;
	uint16 mode;

	Common::File *file = new Common::File();
	file->open(_hqrFileName);
	file->seek(_indices[index]);
	realSize = file->readUint32LE();
	compressedSize = file->readUint32LE();
	mode = file->readUint16LE();
	
	uint32 begin = _indices[index] + 10;
	uint32 end = 0;
	if (mode == 0) {
		end = begin + realSize;
	} else {
		end = begin + compressedSize;
	}
	Common::SeekableReadStream *stream = new Common::SeekableSubReadStream(file, begin, end, DisposeAfterUse::YES);

	if (mode != 0) {
		stream = new LzssReadStream(stream, mode, realSize);
	}

	return stream;
}

Common::SeekableReadStream *MADSResourceManager::loadResource(const char *resourceName, bool loadFlag) {
	Common::File hagFile;
	uint32 offset = 0, size = 0;

	// If the first character is a '@' then look for an external file

	if (*resourceName == '@') {
		++resourceName;

		hagFile.open(resourceName);
		if (loadFlag)
			return hagFile.readStream(hagFile.size());
		else
			return new Common::SeekableSubReadStream(&hagFile, 0, hagFile.size());
	}

	// If the first character is the wildcard (resource indicator), skip over it
	if (*resourceName == '*')
		++resourceName;

	char resName[20];
	strcpy(resName, resourceName);
	str_upper(resName);

	hagFile.open(getResourceFilename(resName));

	// Validate hag file header
	char headerBuffer[16];
	if ((hagFile.read(headerBuffer, 16) != 16) || (strncmp(headerBuffer, madsConcatString, 10) != 0))
		error("Invalid HAG file opened");

	int numEntries = hagFile.readUint16LE();

	int resIndex = -1;
	while (++resIndex < numEntries) {
		// Read in the details of the next resource
		char resourceBuffer[14];
		offset = hagFile.readUint32LE();
		size = hagFile.readUint32LE();
		hagFile.read(resourceBuffer, 14);

		if (!strcmp(resName, resourceBuffer))
			break;
	}

	if (resIndex == numEntries)
		error("Invalid resource '%s' specified", resourceName);

	// Get the resource, either loading it in it's entirely or getting a stream reference

	if (loadFlag) {
		hagFile.seek(offset);
		return hagFile.readStream(size);
	} else {
		return new Common::SeekableSubReadStream(&hagFile, offset, offset + size);
	}
}

bool SliceAnimations::open(const Common::String &name) {
	Common::File file;
	if (!file.open(_vm->getResourceStream(name), name))
		return false;

	_timestamp    = file.readUint32LE();
	_pageSize     = file.readUint32LE();
	_pageCount    = file.readUint32LE();
	_paletteCount = file.readUint32LE();

	if (_timestamp != 0x3457b6f6) // Timestamp: Wed, 29 Oct 1997 22:21:42 GMT
		return false;

	_palettes.resize(_paletteCount);

	for (uint32 i = 0; i != _paletteCount; ++i) {
		for (uint32 j = 0; j != 256; ++j) {
			uint8 color_r = file.readByte();
			uint8 color_g = file.readByte();
			uint8 color_b = file.readByte();

			_palettes[i].color[j].r = color_r;
			_palettes[i].color[j].g = color_g;
			_palettes[i].color[j].b = color_b;

			uint16 rgb555 = ((uint16)color_r << 10) |
			                ((uint16)color_g <<  5) |
			                 (uint16)color_b;

			_palettes[i].color555[j] = rgb555;
		}
	}

	uint32 animationCount = file.readUint32LE();
	_animations.resize(animationCount);

	for (uint32 i = 0; i != animationCount; ++i) {
		_animations[i].frameCount       = file.readUint32LE();
		_animations[i].frameSize        = file.readUint32LE();
		_animations[i].fps              = file.readFloatLE();
		_animations[i].positionChange.x = file.readFloatLE();
		_animations[i].positionChange.y = file.readFloatLE();
		_animations[i].positionChange.z = file.readFloatLE();
		_animations[i].facingChange     = file.readFloatLE();
		_animations[i].offset           = file.readUint32LE();
	}

	_pages.resize(_pageCount);
	for (uint32 i = 0; i != _pageCount; ++i)
		_pages[i]._data = nullptr;

	return true;
}

void Music::loadSoundEffect(const Common::String filename, bool loop, bool waitTillFinished) {
	stopSoundEffect();

	Common::File *file = _vm->_resource->openDataFile(filename, MKTAG('D', 'I', 'F', 'F'));
	if (!file)
		return;

	_vm->_anim->_doBlack = false;

	uint32 magicBytes = file->readUint32LE();
	if (magicBytes != 1219009121) {
		warning("readSound: Bad signature, skipping");
		return;
	}
	uint32 soundTag = file->readUint32LE();
	uint32 soundSize = file->readUint32LE();

	if (soundTag != 0)
		return;

	file->skip(soundSize);	// skip the header

	while (soundTag != 65535) {
		_vm->updateEvents();
		soundTag = file->readUint32LE();
		soundSize = file->readUint32LE() - 8;

		if ((soundTag == 30) || (soundTag == 31)) {
			if (waitTillFinished) {
				while (isSoundEffectActive()) {
					_vm->updateEvents();
					_vm->waitTOF();
				}
			}

			file->skip(4);

			uint16 sampleRate = file->readUint16LE();
			file->skip(2);
			playSoundEffect(sampleRate, soundSize, loop, file);
		} else if (soundTag == 65535) {
			if (waitTillFinished) {
				while (isSoundEffectActive()) {
					_vm->updateEvents();
					_vm->waitTOF();
				}
			}
		} else
			file->skip(soundSize);
	}
}

byte *Sword2Engine::fetchPsxBackground(uint32 location) {
	Common::File file;
	PSXScreensEntry header;
	uint32 screenOffset, dataOffset;
	uint32 totSize; // Total size of background, counting data, offset table and additional header
	byte *buffer;

	if (!file.open("screens.clu")) {
		GUIErrorMessage("Broken Sword 2: Cannot open screens.clu");
		return NULL;
	}

	file.seek(location * 4, SEEK_SET);
	screenOffset = file.readUint32LE();

	if (screenOffset == 0) { // We don't have screen data for this location number.
		file.close();
		return NULL;
	}

	// Get to the beginning of PSXScreensEntry
	file.seek(screenOffset + ResHeader::size(), SEEK_SET);

	buffer = (byte *)malloc(PSXScreensEntry::size());
	file.read(buffer, PSXScreensEntry::size());

	// Prepare the header
	header.read(buffer);
	free(buffer);

	file.seek(screenOffset + header.bgOffset + 4, SEEK_SET);
	dataOffset = file.readUint32LE();

	file.seek(screenOffset + header.bgOffset, SEEK_SET);

	totSize = header.bgSize + (dataOffset - header.bgOffset) + 8;
	buffer = (byte *)malloc(totSize);

	// Write some informations before background data
	WRITE_LE_UINT16(buffer, header.bgXres);
	WRITE_LE_UINT16(buffer + 2, header.bgYres);
	WRITE_LE_UINT32(buffer + 4, header.bgOffset);

	file.read(buffer + 8, totSize - 8); // Do not write on the header
	file.close();

	return buffer;
}

// AUDIOnnn.MAP contains 10-byte entries:
// Early format:
// w 5 bits resource type and 11 bits resource number
// dw 7 bits volume number and 25 bits offset
// dw size
// Later format:
// w nEntry
// dw offset+volume (as in resource.map)
// dw size
// ending with 10 0xFFs
int ResourceManager::readAudioMapSCI1(ResourceSource *map, bool unload) {
	Common::File file;

	if (!file.open(map->getLocationName()))
		return SCI_ERROR_RESMAP_NOT_FOUND;

	bool oldFormat = (file.readUint16LE() >> 11) == kResourceTypeAudio;
	file.seek(0);

	for (;;) {
		uint16 n = file.readUint16LE();
		uint32 offset = file.readUint32LE();
		uint32 size = file.readUint32LE();

		if (file.eos() || file.err()) {
			warning("Error while reading %s", map->getLocationName().c_str());
			return SCI_ERROR_RESMAP_NOT_FOUND;
		}

		if (n == 0xffff)
			break;

		byte volume_nr;

		if (oldFormat) {
			n &= 0x07ff; // Mask out resource type
			volume_nr = offset >> 25; // most significant 7 bits
			offset &= 0x01ffffff; // least significant 25 bits
		} else {
			volume_nr = offset >> 28; // most significant 4 bits
			offset &= 0x0fffffff; // least significant 28 bits
		}

		ResourceSource *src = findVolume(map, volume_nr);

		if (src) {
			const ResourceId resId(kResourceTypeAudio, n);

			if (unload)
				removeAudioResource(resId);
			else
				addResource(resId, src, offset, size, map->getLocationName());
		} else {
			warning("Failed to find audio volume %i", volume_nr);
			return SCI_ERROR_NO_RESOURCE_FILES_FOUND;
		}
	}