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Replace NEXTPOW2() macros with constexpr (supported since VS2015)

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This commit is contained in:
Ken Cooke 2019-06-18 10:29:23 -07:00
parent fa4dfffd8e
commit ce7571dcc1
1 changed files with 12 additions and 10 deletions
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22
libraries/audio/src/AudioReverb.cpp
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@ -35,16 +35,6 @@ static const double SQRT2 = 1.41421356237309504880;
static const double FIXQ31 = 2147483648.0;
static const double FIXQ32 = 4294967296.0;
// Round an integer to the next power-of-two, at compile time.
// VS2013 does not support constexpr so macros are used instead.
#define SETBITS0(x) (x)
#define SETBITS1(x) (SETBITS0(x) | (SETBITS0(x) >> 1))
#define SETBITS2(x) (SETBITS1(x) | (SETBITS1(x) >> 2))
#define SETBITS3(x) (SETBITS2(x) | (SETBITS2(x) >> 4))
#define SETBITS4(x) (SETBITS3(x) | (SETBITS3(x) >> 8))
#define SETBITS5(x) (SETBITS4(x) | (SETBITS4(x) >> 16))
#define NEXTPOW2(x) (SETBITS5((x) - 1) + 1)
//
// Allpass delay modulation
//
@ -111,6 +101,18 @@ static const int M_AP19 = 113;
static const int M_AP20 = 107;
static const int M_AP21 = 127;
// Round an integer to the next power-of-two, at compile time
constexpr uint32_t NEXTPOW2(uint32_t n) {
n -= 1;
n |= (n >> 1);
n |= (n >> 2);
n |= (n >> 4);
n |= (n >> 8);
n |= (n >> 16);
n += 1;
return n;
}
//
// Filter design tools using analog-matched response.
// All filter types approximate the s-plane response, including cutoff > Nyquist.