public static byte[] compressFloatsArray(float[] data, float precision)
{
float recPrecision = 1.0f / precision;
int size = data.Length;
int maxIndex = size > 0 ? floatToInt(data[0], recPrecision, precision) : 0;
int minIndex = maxIndex;
for (int i = 0; i < size; i++)
{
int value = floatToInt(data[i], recPrecision, precision);
maxIndex = value < maxIndex ? maxIndex : value;
minIndex = value > minIndex ? minIndex : value;
}
int bitSize = CPShortArrayData.getBitSize(maxIndex - minIndex);
/* 7 bytes
* 3 for minIndex
* 1 for bitSize
* 3 for size
* 1 for rounding ((size * bitSize) >> 3)
*/
int bytesSize = ((size * bitSize) >> 3) + 8;
BitOutputStream bitOutputStream = new BitOutputStream(bytesSize);
bitOutputStream.WriteBits(24, minIndex);
bitOutputStream.WriteBits(8, bitSize);
bitOutputStream.WriteBits(24, size);
for (int i = 0; i < size; i++)
{
int value = floatToInt(data[i], recPrecision, precision);
bitOutputStream.WriteBits(bitSize, value - minIndex);
}
return(bitOutputStream.GetData());
}
