ControlSeqParser::~ControlSeqParser()
{
if (m_values != NULL)
{
free(m_values);
}
freeLookup();
}
void makeLookup(int bitspersamp, int firstSampleIsMSB, int isSigned) {
unsigned char bitmask;
int negVal;
int negConv;
int i, j, k;
int x;
if (lookupTableValid[bitspersamp]) {
freeLookup(bitspersamp);
}
// make the lookup table...
switch (bitspersamp) {
case 1:
bitmask = 0x01;
negVal = 1;
negConv = 2;
break;
case 2:
bitmask = 0x03;
negVal = 2;
negConv = 4;
break;
case 4:
bitmask = 0x0F;
negVal = 8;
negConv = 16;
break;
case 8:
bitmask = 0xFF;
negVal = 128;
negConv = 256;
break;
default:
fprintf(stderr,"phx: Cannot deal with %d bit data!\n",bitspersamp);
exit(9);
}
x = 8/(bitspersamp) - 1;
lookupTable[bitspersamp] = malloc(sizeof(float*)* 8/(bitspersamp));
for (i = 0; i < 8/(bitspersamp); i++) {
lookupTable[bitspersamp][i] = malloc(256*sizeof(float));
for (j = 0; j < 256; j++) {//=bitspersamp){
k = j;
if (firstSampleIsMSB)
k = k >> ((x-i)*bitspersamp);
else
k = k >> ((i)*bitspersamp);
k = k & bitmask;
if (isSigned && k >= negVal)
k = k - negConv;
lookupTable[bitspersamp][i][j] = (float)k;
//printf("%02x\t%02x\t%d %d\n",i,j, k,negVal);
}
}
/**
* newLookup
* Initializes the lookup-table
**/
void
newLookup( int n, int m )
{
int i, j;
if ( lookup != NULL )
freeLookup();
lookup = (int **) malloc( (lookup_n = n) * sizeof(int *));
for ( i = 0; i < lookup_n; i++ )
{
lookup[i] = (int *) malloc( m * sizeof(int) );
for ( j = 0; j < m; j++ )
lookup[i][j] = -1;
}
lookup[0][0] = pointDistance(0, 0);
for ( j = 1; j < m; j++ )
lookup[0][j] = lookup[0][j-1] + pointDistance(0, j);
for ( i = 1; i < n; i++ )
lookup[i][0] = lookup[i-1][0] + pointDistance(i, 0);
}
