C++ READ_LE_UINT32函数代码示例

/**
 * Initialize a multi-part object using a list of images to init
 * each object piece. One object is created for each image in the list.
 * All objects are given the same palette as the first image. A pointer
 * to the first (master) object created is returned.
 * @param pInitTbl			Pointer to multi-object initialisation table
 */
OBJECT *MultiInitObject(const MULTI_INIT *pInitTbl) {
	OBJ_INIT obj_init;	// object init table
	OBJECT *pFirst, *pObj;	// object pointers
	FRAME *pFrame;		// list of images for the multi-part object

	if (FROM_LE_32(pInitTbl->hMulFrame)) {
		// we have a frame handle
		pFrame = (FRAME *)LockMem(FROM_LE_32(pInitTbl->hMulFrame));

		obj_init.hObjImg  = READ_LE_UINT32(pFrame);	// first objects shape
	} else {	// this must be a animation list for a NULL object
		pFrame = NULL;
		obj_init.hObjImg = 0;	// first objects shape
	}

	// init the object init table
	obj_init.objFlags = (int)FROM_LE_32(pInitTbl->mulFlags);	// all objects have same flags
	obj_init.objID    = (int)FROM_LE_32(pInitTbl->mulID);	// all objects have same ID
	obj_init.objX     = (int)FROM_LE_32(pInitTbl->mulX);	// all objects have same X ani pos
	obj_init.objY     = (int)FROM_LE_32(pInitTbl->mulY);	// all objects have same Y ani pos
	obj_init.objZ     = (int)FROM_LE_32(pInitTbl->mulZ);	// all objects have same Z pos

	// create and init the first object
	pObj = pFirst = InitObject(&obj_init);

	if (pFrame) {
		// if we have any animation frames

		pFrame++;

		while (READ_LE_UINT32(pFrame) != 0) {
			// set next objects shape
			obj_init.hObjImg = READ_LE_UINT32(pFrame);

			// create next object and link to previous
			pObj = pObj->pSlave = InitObject(&obj_init);

			pFrame++;
		}
	}

	// null end of list for final object
	pObj->pSlave = NULL;

	// return master object
	return pFirst;
}

void Sound::playSoundData(Audio::SoundHandle *handle, byte *soundData, uint sound, int pan, int vol, bool loop) {
	byte *buffer, flags;
	uint16 compType;
	int blockAlign, rate;

	int size = READ_LE_UINT32(soundData + 4);
	Common::MemoryReadStream stream(soundData, size);
	if (!Audio::loadWAVFromStream(stream, size, rate, flags, &compType, &blockAlign)) {
		error("playSoundData: Not a valid WAV data");
	}

	// The Feeble Files originally used DirectSound, which specifies volume
	// and panning differently than ScummVM does, using a logarithmic scale
	// rather than a linear one.
	//
	// Volume is a value between -10,000 and 0.
	// Panning is a value between -10,000 and 10,000.
	//
	// In both cases, the -10,000 represents -100 dB. When panning, only
	// one speaker's volume is affected - just like in ScummVM - with
	// negative values affecting the left speaker, and positive values
	// affecting the right speaker. Thus -10,000 means the left speaker is
	// silent.

	int v, p;

	vol = CLIP(vol, -10000, 0);
	pan = CLIP(pan, -10000, 10000);

	if (vol) {
		v = (int)((double)Audio::Mixer::kMaxChannelVolume * pow(10.0, (double)vol / 2000.0) + 0.5);
	} else {
		v = Audio::Mixer::kMaxChannelVolume;
	}

	if (pan < 0) {
		p = (int)(255.0 * pow(10.0, (double)pan / 2000.0) + 127.5);
	} else if (pan > 0) {
		p = (int)(255.0 * pow(10.0, (double)pan / -2000.0) - 127.5);
	} else {
		p = 0;
	}

	if (loop == true)
		flags |= Audio::Mixer::FLAG_LOOP;
	
	if (compType == 2) {
		Audio::AudioStream *sndStream = Audio::makeADPCMStream(&stream, size, Audio::kADPCMMS, rate, (flags & Audio::Mixer::FLAG_STEREO) ? 2 : 1, blockAlign);
		buffer = (byte *)malloc(size * 4);
		size = sndStream->readBuffer((int16*)buffer, size * 2);
		size *= 2; // 16bits.
		delete sndStream;
	} else {
		buffer = (byte *)malloc(size);
		memcpy(buffer, soundData + stream.pos(), size);
	}

	_mixer->playRaw(handle, buffer, size, rate, flags | Audio::Mixer::FLAG_AUTOFREE, -1, v, p);
}

void InputPersistenceBlock::read(uint &value) {
	if (checkMarker(UINT_MARKER)) {
		value = READ_LE_UINT32(_iter);
		_iter += 4;
	} else {
		value = 0;
	}
}

uint32 convertSJIStoUTF32(uint8 fB, uint8 sB) {
	// For some reason iconv will refuse "0x81 0xAD" as valid
	// SJIS sequence, even though it is "FULLWIDTH APOSTROPHE",
	// thus we will short circuit iconv and convert it ourself
	// here.
	if (fB == 0x81 && sB == 0xAD)
		return 0x0000FF07;
	// SJIS uses "YEN SIGN" instead of "REVERSE SOLIDUS"
	else if (fB == 0x5C && sB == 0x00)
		return 0x000000A5;
	// SJIS uses "OVERLINE" instead of "TILDE"
	else if (fB == 0x7E && sB == 0x00)
		return 0x0000203E;

	char inBuf[3];

	inBuf[0] = fB;
	inBuf[1] = sB;
	inBuf[2] = 0;

	char outBuf[3 * sizeof(uint32)];
	memset(outBuf, 0, sizeof(outBuf));

	size_t inBufSize = ((fB >= 0x81 && fB <= 0x9F) || (fB >= 0xE0 && fB <= 0xEF)) ? 3 : 2;
	size_t outBufSize = sizeof(outBuf);
#ifdef ICONV_USES_CONST
	const char *inBufWrap = inBuf;
#else
	char *inBufWrap = inBuf;
#endif
	char *outBufWrap = outBuf;

	if (iconv(confSetup, &inBufWrap, &inBufSize, &outBufWrap, &outBufSize) == (size_t)-1)
		return (uint32)-1;

	const uint32 ret = READ_LE_UINT32(outBuf);

	// According to http://www.unicode.org/reports/tr19/tr19-9.html it is possible
	// that a "zero width no-break space" is added as first character (probably
	// to be consistent with the "byte order mark"). In case any iconv implementation
	// does that, we just skip over that bit.
	if (ret == 0x0000FEFF)
		return READ_LE_UINT32(outBuf + 4);
	else
		return ret;
}

	void load(uint32 offset) {
		byte *item = getData(offset);
		uint32 subItemOffset;
		x1 = READ_LE_UINT16(item + 0);
		y1 = READ_LE_UINT16(item + 2);
		x2 = READ_LE_UINT16(item + 4);
		y2 = READ_LE_UINT16(item + 6);
		subRectListCount = READ_LE_UINT32(item + 8);
		subRectListOffset = READ_LE_UINT32(item + 12);
		subItemOffset = subRectListOffset;
		for (uint32 j = 0; j < subRectListCount; j++) {
			SubRectItem subRectItem;
			subRectItem.load(subItemOffset);
			subItemOffset += 16;
			subRectItems.push_back(subRectItem);
		}
	}

void GfxPicture::drawSci11Vga() {
	byte *inbuffer = _resource->data;
	int size = _resource->size;
	int priorityBandsCount = inbuffer[3];
	int has_cel = inbuffer[4];
	int vector_dataPos = READ_LE_UINT32(inbuffer + 16);
	int vector_size = size - vector_dataPos;
	int palette_data_ptr = READ_LE_UINT32(inbuffer + 28);
	int cel_headerPos = READ_LE_UINT32(inbuffer + 32);
	int cel_RlePos = READ_LE_UINT32(inbuffer + cel_headerPos + 24);
	int cel_LiteralPos = READ_LE_UINT32(inbuffer + cel_headerPos + 28);
	Palette palette;

	// Header
	// [headerSize:WORD] [unknown:BYTE] [priorityBandCount:BYTE] [hasCel:BYTE] [unknown:BYTE]
	// [unknown:WORD] [unknown:WORD] [unknown:WORD] [unknown:WORD] [unknown:WORD]
	// Offset 16
	// [vectorDataOffset:DWORD] [unknown:DWORD] [unknown:DWORD] [paletteDataOffset:DWORD]
	// Offset 32
	// [celHeaderOffset:DWORD] [unknown:DWORD]
	// [priorityBandData:WORD] * priorityBandCount
	// [priority:BYTE] [unknown:BYTE]

	// priority bands are supposed to be 14 for sci1.1 pictures
	assert(priorityBandsCount == 14);

	if (_addToFlag) {
		_priority = inbuffer[40 + priorityBandsCount * 2] & 0xF;
	}

	// display Cel-data
	if (has_cel) {
		// Create palette and set it
		_palette->createFromData(inbuffer + palette_data_ptr, size - palette_data_ptr, &palette);
		_palette->set(&palette, true);

		drawCelData(inbuffer, size, cel_headerPos, cel_RlePos, cel_LiteralPos, 0, 0, 0);
	}

	// process vector data
	drawVectorData(inbuffer + vector_dataPos, vector_size);

	// Set priority band information
	_ports->priorityBandsInitSci11(inbuffer + 40);
}

void KeyframeAnim::loadBinary(const char *data, int len) {
	// First four bytes are the FYEK Keyframe identifier code
	// Next 36 bytes are the filename
	if (gDebugLevel == DEBUG_NORMAL || gDebugLevel == DEBUG_ALL) {
		char filebuf[37];

		memcpy(filebuf, data + 4, 36);
		filebuf[36] = 0;
		printf("Loading Keyframe '%s'.", filebuf);
	}
	// Next four bytes are the flags
	_flags = READ_LE_UINT32(data + 40);
	// Next four bytes are a duplicate of _numJoints (?)
	// Next four bytes are the type
	_type = READ_LE_UINT32(data + 48);
	// Next four bytes are the frames per second
	_fps = get_float(data + 52);
	// Next four bytes are the number of frames
	_numFrames = READ_LE_UINT32(data + 56);
	// Next four bytes are the number of joints
	_numJoints = READ_LE_UINT32(data + 60);
	// Next four bytes are unknown (?)
	// Next four bytes are the number of markers
	_numMarkers = READ_LE_UINT32(data + 68);
	_markers = new Marker[_numMarkers];
	for (int i = 0; i < _numMarkers; i++) {
		_markers[i].frame = get_float(data + 72 + 4 * i);
		_markers[i].val = READ_LE_UINT32(data + 104 + 4 * i);
	}

	_nodes = new KeyframeNode *[_numJoints];
	for (int i = 0; i < _numJoints; i++)
		_nodes[i] = NULL;
	const char *dataEnd = data + len;
	// The first 136 bytes are for the header, this was originally
	// listed as 180 bytes since the first operation is usually a
	// "null" key, however ma_card_hold.key showed that this is
	// not always the case so we should not skip this operation
	data += 136;
	while (data < dataEnd) {
		int nodeNum;
		// The first 32 bytes (of a keyframe) are the name handle
		// The next four bytes are the node number identifier
		nodeNum = READ_LE_UINT32(data + 32);

		// Because of the issue above ma_card_hold.key used to crash
		// at this part without checking to make sure nodeNum is a
		// valid number, we'll leave this in just in case something
		// else is still wrong but it should now load correctly in
		// all cases
		if (nodeNum >= _numJoints) {
			if (gDebugLevel == DEBUG_WARN || gDebugLevel == DEBUG_ALL) {
				warning("A node number was greater than the maximum number of nodes (%d/%d)", nodeNum, _numJoints);
			}
			return;
		}
		_nodes[nodeNum] = new KeyframeNode;
		_nodes[nodeNum]->loadBinary(data);
	}
}

uint32 Script::readUint32() {
	byte v[4] = {0, 0, 0, 0};
	uint32 n;

	n = read(v, 4);
	assert(n == 4);

	return READ_LE_UINT32(v);
}

void Sound::playMidi(int16_t objKey, int index) {
	if (index >= 0 && index < kMusicKeyPathsTableSize) {
		int16_t sndKey = _res->getKeyFromPath(_res->_musicKeyPathsTable[index]);
		const uint8_t *p_sndinfo = _res->getData(kResType_SND, sndKey, "SNDINFO");
		if (p_sndinfo && READ_LE_UINT32(p_sndinfo + 32) == 2) {
//			printf("play.midi '%s'\n", (const char *)p_sndinfo);
		}
	}
}

int32 SaveGame::readLESint32() {
	if (_saving)
		error("SaveGame::readBlock called when storing a savegame");
	if (_currentSection == 0)
		error("Tried to read a block without starting a section");
	int32 data = (int32)READ_LE_UINT32(&_sectionBuffer[_sectionPtr]);
	_sectionPtr += 4;
	return data;
}

void Sound::playSoundData(Audio::SoundHandle *handle, byte *soundData, uint sound, int pan, int vol, bool loop) {
	int size = READ_LE_UINT32(soundData + 4) + 8;
	Common::SeekableReadStream *stream = new Common::MemoryReadStream(soundData, size);
	Audio::RewindableAudioStream *sndStream = Audio::makeWAVStream(stream, DisposeAfterUse::YES);

	convertVolume(vol);
	convertPan(pan);

	_mixer->playStream(Audio::Mixer::kSFXSoundType, handle, Audio::makeLoopingAudioStream(sndStream, loop ? 0 : 1), -1, vol, pan);
}

Bitmap::Bitmap(const char *fname, const char *data, int len) :
		Object() {
	_fname = fname;

	if (len < 8 || memcmp(data, "BM  F\0\0\0", 8) != 0) {
		if (gDebugLevel == DEBUG_BITMAPS || gDebugLevel == DEBUG_ERROR || gDebugLevel == DEBUG_ALL)
			error("Invalid magic loading bitmap");
	}

	strcpy(_filename, fname);

	int codec = READ_LE_UINT32(data + 8);
//  _paletteIncluded = READ_LE_UINT32(data + 12);
	_numImages = READ_LE_UINT32(data + 16);
	_x = READ_LE_UINT32(data + 20);
	_y = READ_LE_UINT32(data + 24);
//  _transparentColor = READ_LE_UINT32(data + 28);
	_format = READ_LE_UINT32(data + 32);
//  _numBits = READ_LE_UINT32(data + 36);
//  _blueBits = READ_LE_UINT32(data + 40);
//  _greenBits = READ_LE_UINT32(data + 44);
//  _redBits = READ_LE_UINT32(data + 48);
//  _blueShift = READ_LE_UINT32(data + 52);
//  _greenShift = READ_LE_UINT32(data + 56);
//  _redShift = READ_LE_UINT32(data + 60);
	_width = READ_LE_UINT32(data + 128);
	_height = READ_LE_UINT32(data + 132);
	_currImage = 1;

	_data = new char *[_numImages];
	int pos = 0x88;
	for (int i = 0; i < _numImages; i++) {
		_data[i] = new char[2 * _width * _height];
		if (codec == 0) {
			memcpy(_data[i], data + pos, 2 * _width * _height);
			pos += 2 * _width * _height + 8;
		} else if (codec == 3) {
			int compressed_len = READ_LE_UINT32(data + pos);
			decompress_codec3(data + pos + 4, _data[i]);
			pos += compressed_len + 12;
		}

#ifdef SYSTEM_BIG_ENDIAN
		if (_format == 1)
			for (int j = 0; j < _width * _height; ++j) {
				((uint16 *)_data[i])[j] = SWAP_BYTES_16(((uint16 *)_data[i])[j]);
			}
#endif
	}

	g_driver->createBitmap(this);
}

static void MoverProcessHelper(int X, int Y, int id, PMOVER pMover) {
	const FILM *pfilm;
	const MULTI_INIT *pmi;
	const FRAME *pFrame;
	IMAGE *pim;


	assert(BgPal()); // Can't start actor without a background palette
	assert(pMover->walkReels[0][FORWARD]); // Starting actor process without walk reels

	InitMover(pMover);
	InitialPathChecks(pMover, X, Y);

	pfilm = (const FILM *)LockMem(pMover->walkReels[0][FORWARD]);
	pmi = (const MULTI_INIT *)LockMem(FROM_LE_32(pfilm->reels[0].mobj));

//---
	pFrame = (const FRAME *)LockMem(FROM_LE_32(pmi->hMulFrame));

	// get pointer to image
	pim = (IMAGE *)LockMem(READ_LE_UINT32(pFrame));	// handle to image
	pim->hImgPal = TO_LE_32(BgPal());
//---
	pMover->actorObj = MultiInitObject(pmi);

/**/	assert(pMover->actorID == id);
	pMover->actorID = id;

	// add it to display list
	MultiInsertObject(GetPlayfieldList(FIELD_WORLD), pMover->actorObj);
	storeActorReel(id, NULL, 0, pMover->actorObj, 0, 0, 0);

	InitStepAnimScript(&pMover->actorAnim, pMover->actorObj, FROM_LE_32(pfilm->reels[0].script), ONE_SECOND / FROM_LE_32(pfilm->frate));
	pMover->stepCount = 0;

	MultiSetAniXY(pMover->actorObj, pMover->objX, pMover->objY);

	// If no path, just use first path in the scene
	if (pMover->hCpath != NOPOLY)
		SetMoverZ(pMover, pMover->objY, GetPolyZfactor(pMover->hCpath));
	else
		SetMoverZ(pMover, pMover->objY, GetPolyZfactor(FirstPathPoly()));

	// Make him the right size
	SetMoverStanding(pMover);

//**** if added 18/11/94, am
	if (X != MAGICX && Y != MAGICY) {
		HideMover(pMover, 0);		// Allows a play to come in before this appears
		pMover->bHidden = false;	// ...but don't stay hidden
	}

	pMover->bActive = true;
}

void KeyframeAnim::KeyframeEntry::loadBinary(const char *data) {
	_frame = get_float(data);
	_flags = READ_LE_UINT32(data + 4);
	_pos = Math::Vector3d::get_vector3d(data + 8);
	_pitch = get_float(data + 20);
	_yaw = get_float(data + 24);
	_roll = get_float(data + 28);
	_dpos = Math::Vector3d::get_vector3d(data + 32);
	_dpitch = get_float(data + 44);
	_dyaw = get_float(data + 48);
	_droll = get_float(data + 52);
}

void CDROM::startTrack(const char *trackname) {
	byte *curPtr, *matchPtr;

	if (!_LICbuffer)
		return;

	debugC(1, DEBUG_MUSIC, "startTrack(%s)", trackname);

	matchPtr = 0;
	curPtr = _LICbuffer;

	for (int i = 0; i < _numTracks; i++) {
		if (!scumm_stricmp((char *)curPtr, trackname)) {
			matchPtr = curPtr;
			break;
		}
		curPtr += 22;
	}

	if (!matchPtr) {
		error("Track %s not found", trackname);
		return;
	}

	strcpy(_curTrack, trackname);

	stopPlaying();

	while (getTrackPos() != -1);

	uint32 start, end;

	start = READ_LE_UINT32(matchPtr + 12);
	end   = READ_LE_UINT32(matchPtr + 16);

	play(start, end);

	_startTime = _vm->_util->getTimeKey();
	_trackStop = _startTime + (end - start + 1 + 150) * 40 / 3;
}