rotate.go
· 1.1 KiB · Go
Originalformat
var rotation90 = complex(tools.Cos(float32(math.Pi/2)), tools.Sin(float32(math.Pi/2)))
func rotateByte(v byte, n int, conj bool) byte {
byteData := make([]byte, 8)
outByteData := make([]byte, 8)
// region convert to bits in bytes
for i := 0; i < 8; i++ {
byteData[i] = -127
if v & (1 << uint(i)) > 0 {
byteData[i] = 127
}
}
// endregion
// region Rotate
for i := 0; i < 4; i++ {
// Sync Word
b0 := int(byteData[i*2])
b1 := int(byteData[i*2+1])
// 0 degrees
c := complex(float32(b0), float32(b1))
for z := 0; z < n; z++ {
c *= rotation90
}
outByteData[i*2] = f2b(real(c))
if conj {
outByteData[i*2+1] = -f2b(imag(c))
} else {
outByteData[i*2+1] = f2b(imag(c))
}
}
// endregion
// region Unmap to Byte
v = 0
for i := 0; i < 8; i++ {
t := 0
if outByteData[i] > 0 {
t = 1
}
v |= byte(t << uint(i))
}
// endregion
return v
}
| 1 | var rotation90 = complex(tools.Cos(float32(math.Pi/2)), tools.Sin(float32(math.Pi/2))) |
| 2 | func rotateByte(v byte, n int, conj bool) byte { |
| 3 | byteData := make([]byte, 8) |
| 4 | outByteData := make([]byte, 8) |
| 5 | |
| 6 | // region convert to bits in bytes |
| 7 | for i := 0; i < 8; i++ { |
| 8 | byteData[i] = -127 |
| 9 | if v & (1 << uint(i)) > 0 { |
| 10 | byteData[i] = 127 |
| 11 | } |
| 12 | } |
| 13 | // endregion |
| 14 | // region Rotate |
| 15 | for i := 0; i < 4; i++ { |
| 16 | // Sync Word |
| 17 | b0 := int(byteData[i*2]) |
| 18 | b1 := int(byteData[i*2+1]) |
| 19 | |
| 20 | // 0 degrees |
| 21 | c := complex(float32(b0), float32(b1)) |
| 22 | for z := 0; z < n; z++ { |
| 23 | c *= rotation90 |
| 24 | } |
| 25 | outByteData[i*2] = f2b(real(c)) |
| 26 | if conj { |
| 27 | outByteData[i*2+1] = -f2b(imag(c)) |
| 28 | } else { |
| 29 | outByteData[i*2+1] = f2b(imag(c)) |
| 30 | } |
| 31 | } |
| 32 | // endregion |
| 33 | // region Unmap to Byte |
| 34 | v = 0 |
| 35 | for i := 0; i < 8; i++ { |
| 36 | t := 0 |
| 37 | if outByteData[i] > 0 { |
| 38 | t = 1 |
| 39 | } |
| 40 | |
| 41 | v |= byte(t << uint(i)) |
| 42 | } |
| 43 | // endregion |
| 44 | |
| 45 | return v |
| 46 | } |
| 47 |