void tiff::Header::deserialize(io::InputStream& input)
{
input.read((sys::byte *)&mByteOrder, sizeof(mByteOrder));
input.read((sys::byte *)&mId, sizeof(mId));
input.read((sys::byte *)&mIFDOffset, sizeof(mIFDOffset));
mDifferentByteOrdering = sys::isBigEndianSystem() ? \
getByteOrder() != tiff::Header::MM : getByteOrder() != tiff::Header::II;
if (mDifferentByteOrdering)
{
mId = sys::byteSwap(mId);
mIFDOffset = sys::byteSwap(mIFDOffset);
}
}
//-----------------------------------------------------------------------------
void PDCFileWriter::writePDCHeader(ofstream &outfile)
{
//create temporary versions of the variables to byte-swap
int temp_formatVersion = getFormatVersion();
int temp_byteOrder = getByteOrder();
int temp_extra1 = getExtra1();
int temp_extra2 = getExtra2();
int temp_numParticles = getParticleCount();
int temp_numAttributes = getAttributeCount();
//do swap of byte order
swapInt((char*) &temp_formatVersion);
swapInt((char*) &temp_byteOrder);
swapInt((char*) &temp_extra1);
swapInt((char*) &temp_extra2);
swapInt((char*) &temp_numParticles);
swapInt((char*) &temp_numAttributes);
//write out to file
for(int i=0;i<4;i++)
{
outfile.put( m_format[i]);
}
outfile.write((char*) &temp_formatVersion, sizeof(int));
outfile.write((char*) &temp_byteOrder, sizeof(int));
outfile.write((char*) &temp_extra1, sizeof(int));
outfile.write((char*) &temp_extra2, sizeof(int));
outfile.write((char*) &temp_numParticles, sizeof(int));
outfile.write((char*) &temp_numAttributes, sizeof(int));
}
unsigned SoundSourceOggVorbis::read(volatile unsigned long size, const SAMPLE * destination) {
if (size % 2 != 0) {
qDebug() << "SoundSourceOggVorbis got non-even size in read.";
size--;
}
char *pRead = (char*) destination;
SAMPLE *dest = (SAMPLE*) destination;
// 'needed' is size of buffer in bytes. 'size' is size in SAMPLEs,
// which is 2 bytes. If the stream is mono, we read 'size' bytes,
// so that half the buffer is full, then below we double each
// sample on the left and right channel. If the stream is stereo,
// then ov_read interleaves the samples into the full length of
// the buffer.
// ov_read speaks bytes, we speak words. needed is the bytes to
// read, not words to read.
// size is the maximum space in words that we have in
// destination. For stereo files, read the full buffer (size*2
// bytes). For mono files, only read half the buffer (size bytes),
// and we will double the buffer to be in stereo later.
unsigned int needed = size * channels;
unsigned int index=0,ret=0;
// loop until requested number of samples has been retrieved
while (needed > 0) {
// read samples into buffer
ret = ov_read(&vf, pRead+index, needed, getByteOrder(), 2, 1, ¤t_section);
if (ret <= 0) {
// An error or EOF occured, break out and return what we have sofar.
break;
}
index += ret;
needed -= ret;
}
// As of here, index is the total bytes read. (index/2/channels) is the
// total frames read.
// convert into stereo if file is mono
if (channels == 1) {
SampleUtil::doubleMonoToDualMono(dest, index / 2);
// Pretend we read twice as many bytes as we did, since we just repeated
// each pair of bytes.
index *= 2;
}
// index is the total bytes read, so the words read is index/2
return index / 2;
}
// Update digest with data of size len, do in blocks
void HASHwithTransform::Update(const byte* data, word32 len)
{
// do block size increments
word32 blockSz = getBlockSize();
byte* local = reinterpret_cast<byte*>(buffer_);
while (len) {
word32 add = min(len, blockSz - buffLen_);
memcpy(&local[buffLen_], data, add);
buffLen_ += add;
data += add;
len -= add;
if (buffLen_ == blockSz) {
ByteReverseIf(local, local, blockSz, getByteOrder());
Transform();
AddLength(blockSz);
buffLen_ = 0;
}
}
}
// Final process, place digest in hash
void HASHwithTransform::Final(byte* hash)
{
word32 blockSz = getBlockSize();
word32 digestSz = getDigestSize();
word32 padSz = getPadSize();
ByteOrder order = getByteOrder();
AddLength(buffLen_); // before adding pads
HashLengthType preLoLen = GetBitCountLo();
HashLengthType preHiLen = GetBitCountHi();
byte* local = reinterpret_cast<byte*>(buffer_);
local[buffLen_++] = 0x80; // add 1
// pad with zeros
if (buffLen_ > padSz) {
memset(&local[buffLen_], 0, blockSz - buffLen_);
buffLen_ += blockSz - buffLen_;
ByteReverseIf(local, local, blockSz, order);
Transform();
buffLen_ = 0;
}
memset(&local[buffLen_], 0, padSz - buffLen_);
ByteReverseIf(local, local, blockSz, order);
memcpy(&local[padSz], order ? &preHiLen : &preLoLen, sizeof(preLoLen));
memcpy(&local[padSz+4], order ? &preLoLen : &preHiLen, sizeof(preLoLen));
Transform();
ByteReverseIf(digest_, digest_, digestSz, order);
memcpy(hash, digest_, digestSz);
Init(); // reset state
}
unsigned SoundSourceOggVorbis::read(volatile unsigned long size, const SAMPLE * destination) {
if (size % 2 != 0) {
qDebug() << "SoundSourceOggVorbis got non-even size in read.";
size--;
}
char *pRead = (char*) destination;
SAMPLE *dest = (SAMPLE*) destination;
// 'needed' is size of buffer in bytes. 'size' is size in SAMPLEs,
// which is 2 bytes. If the stream is mono, we read 'size' bytes,
// so that half the buffer is full, then below we double each
// sample on the left and right channel. If the stream is stereo,
// then ov_read interleaves the samples into the full length of
// the buffer.
// ov_read speaks bytes, we speak words. needed is the bytes to
// read, not words to read.
// size is the maximum space in words that we have in
// destination. For stereo files, read the full buffer (size*2
// bytes). For mono files, only read half the buffer (size bytes),
// and we will double the buffer to be in stereo later.
unsigned int needed = size * channels;
unsigned int index=0,ret=0;
// loop until requested number of samples has been retrieved
while (needed > 0) {
// read samples into buffer
ret = ov_read(&vf, pRead+index, needed, getByteOrder(), 2, 1, ¤t_section);
if (ret <= 0) {
// An error or EOF occured, break out and return what we have sofar.
break;
}
index += ret;
needed -= ret;
}
// As of here, index is the total bytes read. (index/2/channels) is the
// total frames read.
// convert into stereo if file is mono
if (channels == 1) {
// rryan 2/2009
// Mini-proof of the below:
// size = 20, destination is a 20 element array 0-19
// readNo = 10 (or less, but 10 in this case)
// i = 10-1 = 9, so dest[9*2] and dest[9*2+1],
// so the first iteration touches the very ends of destination
// on the last iteration, dest[0] and dest[1] are assigned to dest[0]
for(int i=(index/2-1); i>=0; i--) {
dest[i*2] = dest[i];
dest[(i*2)+1] = dest[i];
}
// Pretend we read twice as many bytes as we did, since we just repeated
// each pair of bytes.
index *= 2;
}
// index is the total bytes read, so the words read is index/2
return index / 2;
}
inline bool Endianness::isPDP()
{
return (getByteOrder() == Endianness::PDP);
}
inline bool Endianness::isBig()
{
return (getByteOrder() == Endianness::BIG);
}
inline bool Endianness::isLittle()
{
return (getByteOrder() == Endianness::LITTLE);
}
