bool Bitmap::bitIsOn(int bitPos)
{
int bytePos = getBytePos(bitPos);
char c = bitmap[bytePos];
bitPos = std::abs((bytePos*8) - bitPos);
return (c & (1 << bitPos)) != 0;
}
uint8 Matrix::as_uint8At(uint16 row, uint16 column) const
{
//return the uint8 at the requested position
return m_data.read_uint8(getBytePos(row, column));
}
float Matrix::as_floatAt(uint16 row, uint16 column) const
{
//return the float at the requested position
return m_data.read_float(getBytePos(row, column));
}
void Bitmap::turnOffBit(int bitPos)
{
int bytePos = getBytePos(bitPos);
bitPos = std::abs((bytePos*8) - bitPos);
bitmap[bytePos] &= ~(1<<bitPos);
}
void Bitmap::toggleBit(int bitPos)
{
int bytePos = getBytePos(bitPos);
bitPos = std::abs((bytePos*8) - bitPos);
bitmap[bytePos] ^= (1<< bitPos);
}
bool DTSC::File::seek_time(unsigned int ms, unsigned int trackNo, bool forceSeek) {
seekPos tmpPos;
tmpPos.trackID = trackNo;
if (!forceSeek && myPack && ms >= myPack.getTime() && trackNo >= myPack.getTrackId()) {
tmpPos.seekTime = myPack.getTime();
tmpPos.bytePos = getBytePos();
} else {
tmpPos.seekTime = 0;
tmpPos.bytePos = 0;
}
if (reachedEOF()) {
clearerr(F);
seek_bpos(0);
tmpPos.bytePos = 0;
tmpPos.seekTime = 0;
}
DTSC::Track & trackRef = metadata.tracks[trackNo];
for (unsigned int i = 0; i < trackRef.keys.size(); i++) {
long keyTime = trackRef.keys[i].getTime();
if (keyTime > ms) {
break;
}
if ((long long unsigned int)keyTime > tmpPos.seekTime) {
tmpPos.seekTime = keyTime;
tmpPos.bytePos = trackRef.keys[i].getBpos();
}
}
bool foundPacket = false;
while (!foundPacket) {
lastreadpos = ftell(F);
if (reachedEOF()) {
DEBUG_MSG(DLVL_WARN, "Reached EOF during seek to %u in track %d - aborting @ %lld", ms, trackNo, lastreadpos);
return false;
}
//Seek to first packet after ms.
seek_bpos(tmpPos.bytePos);
//read the header
char header[20];
if (fread((void *)header, 20, 1, F) != 1){
DEBUG_MSG(DLVL_WARN, "Could not read header from file. Much sadface.");
return false;
}
//check if packetID matches, if not, skip size + 8 bytes.
int packSize = ntohl(((int *)header)[1]);
unsigned int packID = ntohl(((int *)header)[2]);
if (memcmp(header, Magic_Packet2, 4) != 0 || packID != trackNo) {
if (memcmp(header, "DT", 2) != 0) {
DEBUG_MSG(DLVL_WARN, "Invalid header during seek to %u in track %d @ %lld - resetting bytePos from %lld to zero", ms, trackNo, lastreadpos, tmpPos.bytePos);
tmpPos.bytePos = 0;
continue;
}
tmpPos.bytePos += 8 + packSize;
continue;
}
//get timestamp of packet, if too large, break, if not, skip size bytes.
long long unsigned int myTime = ((long long unsigned int)ntohl(((int *)header)[3]) << 32);
myTime += ntohl(((int *)header)[4]);
tmpPos.seekTime = myTime;
if (myTime >= ms) {
foundPacket = true;
} else {
tmpPos.bytePos += 8 + packSize;
continue;
}
}
//DEBUG_MSG(DLVL_HIGH, "Seek to %u:%d resulted in %lli", trackNo, ms, tmpPos.seekTime);
if (tmpPos.seekTime > 0xffffffffffffff00ll){
tmpPos.seekTime = 0;
}
currentPositions.insert(tmpPos);
return true;
}
/// Reads the packet available at the current file position.
/// If the packet could not be read for any reason, the reason is printed.
/// Reading the packet means the file position is increased to the next packet.
void DTSC::File::seekNext() {
if (!currentPositions.size()) {
DEBUG_MSG(DLVL_WARN, "No seek positions set - returning empty packet.");
myPack.null();
return;
}
seekPos thisPos = *currentPositions.begin();
fseek(F, thisPos.bytePos, SEEK_SET);
if (reachedEOF()) {
myPack.null();
return;
}
clearerr(F);
currentPositions.erase(currentPositions.begin());
lastreadpos = ftell(F);
if (fread(buffer, 4, 1, F) != 1) {
if (feof(F)) {
DEBUG_MSG(DLVL_DEVEL, "End of file reached while seeking @ %i", (int)lastreadpos);
} else {
DEBUG_MSG(DLVL_ERROR, "Could not seek to next @ %i", (int)lastreadpos);
}
myPack.null();
return;
}
if (memcmp(buffer, DTSC::Magic_Header, 4) == 0) {
seek_time(myPack.getTime(), myPack.getTrackId(), true);
return seekNext();
}
long long unsigned int version = 0;
if (memcmp(buffer, DTSC::Magic_Packet, 4) == 0) {
version = 1;
}
if (memcmp(buffer, DTSC::Magic_Packet2, 4) == 0) {
version = 2;
}
if (version == 0) {
DEBUG_MSG(DLVL_ERROR, "Invalid packet header @ %#x - %.4s != %.4s @ %d", (unsigned int)lastreadpos, (char *)buffer, DTSC::Magic_Packet2, (int)lastreadpos);
myPack.null();
return;
}
if (fread(buffer, 4, 1, F) != 1) {
DEBUG_MSG(DLVL_ERROR, "Could not read packet size @ %d", (int)lastreadpos);
myPack.null();
return;
}
long packSize = ntohl(((unsigned long *)buffer)[0]);
char * packBuffer = (char *)malloc(packSize + 8);
if (version == 1) {
memcpy(packBuffer, "DTPD", 4);
} else {
memcpy(packBuffer, "DTP2", 4);
}
memcpy(packBuffer + 4, buffer, 4);
if (fread((void *)(packBuffer + 8), packSize, 1, F) != 1) {
DEBUG_MSG(DLVL_ERROR, "Could not read packet @ %d", (int)lastreadpos);
myPack.null();
free(packBuffer);
return;
}
myPack.reInit(packBuffer, packSize + 8);
free(packBuffer);
if (metadata.merged) {
int tempLoc = getBytePos();
char newHeader[20];
bool insert = false;
seekPos tmpPos;
if (fread((void *)newHeader, 20, 1, F) == 1) {
if (memcmp(newHeader, DTSC::Magic_Packet2, 4) == 0) {
tmpPos.bytePos = tempLoc;
tmpPos.trackID = ntohl(((int *)newHeader)[2]);
tmpPos.seekTime = 0;
if (selectedTracks.find(tmpPos.trackID) != selectedTracks.end()) {
tmpPos.seekTime = ((long long unsigned int)ntohl(((int *)newHeader)[3])) << 32;
tmpPos.seekTime += ntohl(((int *)newHeader)[4]);
insert = true;
} else {
long tid = myPack.getTrackId();
for (unsigned int i = 0; i != metadata.tracks[tid].keys.size(); i++) {
if ((unsigned long long)metadata.tracks[tid].keys[i].getTime() > myPack.getTime()) {
tmpPos.seekTime = metadata.tracks[tid].keys[i].getTime();
tmpPos.bytePos = metadata.tracks[tid].keys[i].getBpos();
tmpPos.trackID = tid;
insert = true;
break;
}
}
}
if (currentPositions.size()) {
for (std::set<seekPos>::iterator curPosIter = currentPositions.begin(); curPosIter != currentPositions.end(); curPosIter++) {
if ((*curPosIter).trackID == tmpPos.trackID && (*curPosIter).seekTime >= tmpPos.seekTime) {
insert = false;
break;
}
}
}
}
}
if (insert){
if (tmpPos.seekTime > 0xffffffffffffff00ll){
tmpPos.seekTime = 0;
}
currentPositions.insert(tmpPos);
} else {
seek_time(myPack.getTime(), myPack.getTrackId(), true);
}
seek_bpos(tempLoc);
}else{
seek_time(thisPos.seekTime, thisPos.trackID);
fseek(F, thisPos.bytePos, SEEK_SET);
}
}
