C++ File::readStream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;
}

uint SoundChannel::play(uint soundNum, uint repeats, uint notify) {
	stop();
	if (repeats == 0)
		return 1;

	// Find a sound of the given name
	Audio::AudioStream *stream;
	Common::File f;
	Common::String nameSnd = Common::String::format("sound%u.snd", soundNum);
	Common::String nameWav = Common::String::format("sound%u.wav", soundNum);
	Common::String nameAiff = Common::String::format("sound%u.aiff", soundNum);
#ifdef USE_MAD
	Common::String nameMp3 = Common::String::format("sound%u.mp3", soundNum);
#endif

	if (f.exists(nameSnd) && f.open(nameSnd)) {
		if (f.readUint16BE() != (f.size() - 2))
			error("Invalid sound filesize");
		repeats = f.readByte();
		f.skip(1);
		uint freq = f.readUint16BE();
		f.skip(2);
		uint size = f.readUint16BE();

		Common::SeekableReadStream *s = f.readStream(size);
		stream = Audio::makeRawStream(s, freq, Audio::FLAG_UNSIGNED);

#ifdef USE_MAD
	} else if (f.exists(nameMp3) && f.open(nameMp3)) {
		Common::SeekableReadStream *s = f.readStream(f.size());
		stream = Audio::makeMP3Stream(s, DisposeAfterUse::YES);
#endif
	} else if (f.exists(nameWav) && f.open(nameWav)) {
		Common::SeekableReadStream *s = f.readStream(f.size());
		stream = Audio::makeWAVStream(s, DisposeAfterUse::YES);

	} else if (f.exists(nameAiff) && f.open(nameAiff)) {
		Common::SeekableReadStream *s = f.readStream(f.size());
		stream = Audio::makeAIFFStream(s, DisposeAfterUse::YES);

	} else {
		warning("Could not find sound %u", soundNum);
		return 1;
	}

	_soundNum = soundNum;
	_notify = notify;

	// Set up a repeat if multiple repeats are specified
	if (repeats > 1) {
		Audio::RewindableAudioStream *rwStream = dynamic_cast<Audio::RewindableAudioStream *>(stream);
		assert(rwStream);
		stream = new Audio::LoopingAudioStream(rwStream, repeats, DisposeAfterUse::YES);
	}

	// Start playing the audio
	g_vm->_mixer->playStream(Audio::Mixer::kPlainSoundType, &_handle, stream);
	return 0;
}

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);
	}
}

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);
	}
}

Common::SeekableReadStream *Resources::load(const Common::String &filename) {
	// First check if the file is directly in the cache
	if (_cache.isCached(filename))
		return _cache.get(filename);

	// Secondly, iterate through any loaded library file looking for a resource
	// that has the same name
	for (LibraryIndexes::iterator i = _indexes.begin(); i != _indexes.end(); ++i) {
		if (i->_value.contains(filename)) {
			// Get a stream reference to the given library file
			Common::SeekableReadStream *stream = load(i->_key);
			LibraryEntry &entry = i->_value[filename];
			_resourceIndex = entry._index;

			stream->seek(entry._offset);
			Common::SeekableReadStream *resStream = stream->readStream(entry._size);
			decompressIfNecessary(resStream);

			delete stream;
			return resStream;
		}
	}

	// At this point, fall back on a physical file with the given name
	Common::File f;
	if (!f.open(filename))
		error("Could not load file - %s", filename.c_str());

	Common::SeekableReadStream *stream = f.readStream(f.size());
	f.close();
	decompressIfNecessary(stream);

	return stream;
}

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);
	}
}

bool FPSfx::loadVoiceFromVDB(Common::File &vdbFP) {
	if (!_soundSupported)
		return true;

	switch (g_vm->_vdbCodec) {
	case FPCODEC_ADPCM: {
		uint32 size = vdbFP.readUint32LE();
		uint32 rate = vdbFP.readUint32LE();

		_rewindableStream = Audio::makeADPCMStream(vdbFP.readStream(size), DisposeAfterUse::YES, 0, Audio::kADPCMDVI, rate, 1);
		}
		break;
	case FPCODEC_MP3 : {
#ifdef USE_MAD
		uint32 size = vdbFP.readUint32LE();
		_rewindableStream = Audio::makeMP3Stream(vdbFP.readStream(size), DisposeAfterUse::YES);
#else
		return false;
#endif
		}
		break;
	case FPCODEC_OGG : {
#ifdef USE_VORBIS
		uint32 size = vdbFP.readUint32LE();
		_rewindableStream = Audio::makeVorbisStream(vdbFP.readStream(size), DisposeAfterUse::YES);
#else
		return false;
#endif
		}
		break;
	case FPCODEC_FLAC : {
#ifdef USE_FLAC
		uint32 size = vdbFP.readUint32LE();
		_rewindableStream = Audio::makeFLACStream(vdbFP.readStream(size), DisposeAfterUse::YES);
#else
		return false;
#endif
		}
		break;
	default:
		return false;
	}
	_isVoice = true;
	_fileLoaded = true;
	setVolume(62);
	return true;
}

void SoundManager::startVOCPlay(const Common::String &filename) {
	Common::File f;
	if (!f.open(filename))
		error("Could not find voc file - %s", filename.c_str());

	Audio::SeekableAudioStream *audioStream = Audio::makeVOCStream(f.readStream(f.size()),
		Audio::FLAG_UNSIGNED, DisposeAfterUse::YES);

	_mixer->playStream(Audio::Mixer::kSFXSoundType, &_soundHandle, audioStream);
	audioStream->seek(Audio::Timestamp(_vocOffset * 1000, 11025));
}

Common::SeekableReadStream *Blorb::createReadStreamForMember(const Common::String &name) const {
	for (uint idx = 0; idx < _chunks.size(); ++idx) {
		if (_chunks[idx]._filename.equalsIgnoreCase(name)) {
			Common::File f;
			if (!f.open(_filename))
				error("Reading failed");

			f.seek(_chunks[idx]._offset);
			Common::SeekableReadStream *result = f.readStream(_chunks[idx]._size);
			f.close();

			return result;
		}
	}

	return nullptr;
}

void Gui::loadBorder(Graphics::MacWindow *target, Common::String filename, bool active) {
	Common::File borderfile;

	if (!borderfile.open(filename)) {
		debug(1, "Cannot open border file");
		return;
	}

	Image::BitmapDecoder bmpDecoder;
	Common::SeekableReadStream *stream = borderfile.readStream(borderfile.size());
	if (stream) {

		target->loadBorder(*stream, active, 10, 10, 1, 1);

		borderfile.close();

		delete stream;
	}
}

Common::SeekableReadStream *NDSFile::getResource(uint32 index) const {
	const IResource &res = getIResource(index);
	if (res.size == 0)
		return new Common::MemoryReadStream(0, 0);

	Common::File nds;
	open(nds);

	if (!nds.seek(res.offset))
		throw Common::Exception(Common::kSeekError);

	Common::SeekableReadStream *resStream = nds.readStream(res.size);

	if (!resStream || (((uint32) resStream->size()) != res.size)) {
		delete resStream;
		throw Common::Exception(Common::kReadError);
	}

	return resStream;
}

Common::SeekableReadStream *InstallShieldCabinet::createReadStreamForMember(const Common::String &name) const {
	if (!_map.contains(name))
		return 0;

	const FileEntry &entry = _map[name];

	Common::File archiveFile;
	archiveFile.open(_installShieldFilename);
	archiveFile.seek(entry.offset);

	if (!(entry.flags & 0x04)) {
		// Not compressed
		return archiveFile.readStream(entry.uncompressedSize);
	}

#ifdef USE_ZLIB
	byte *src = (byte *)malloc(entry.compressedSize);
	byte *dst = (byte *)malloc(entry.uncompressedSize);

	archiveFile.read(src, entry.compressedSize);

	bool result = Common::inflateZlibHeaderless(dst, entry.uncompressedSize, src, entry.compressedSize);
	free(src);

	if (!result) {
		warning("failed to inflate CAB file '%s'", name.c_str());
		free(dst);
		return 0;
	}

	return new Common::MemoryReadStream(dst, entry.uncompressedSize, DisposeAfterUse::YES);
#else
	warning("zlib required to extract compressed CAB file '%s'", name.c_str());
	return 0;
#endif
}