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DPL2Decoder: Make constant variables const in DesignFIR

This commit is contained in:
MerryMage 2017-04-22 09:51:26 +01:00
parent 751351fd20
commit 71dc810418
1 changed files with 8 additions and 10 deletions
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16
Source/Core/AudioCommon/DPL2Decoder.cpp
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@ -122,13 +122,15 @@ returns 0 if OK, -1 if fail
*/ */
static float* DesignFIR(unsigned int n, float fc, float opt) static float* DesignFIR(unsigned int n, float fc, float opt)
{ {
unsigned int o = n & 1; // Indicator for odd filter length const unsigned int o = n & 1; // Indicator for odd filter length
unsigned int end = ((n + 1) >> 1) - o; // Loop end const unsigned int end = ((n + 1) >> 1) - o; // Loop end
float k1 = 2 * float(M_PI); // 2*pi*fc1 // Cutoff frequency must be < 0.5 where 0.5 <=> Fs/2
float k2 = 0.5f * (float)(1 - o); // Constant used if the filter has even length const float fc1 = MathUtil::Clamp(fc, 0.001f, 1.0f) / 2;
const float k1 = 2 * static_cast<float>(M_PI) * fc1; // Cutoff frequency in rad/s
const float k2 = 0.5f * static_cast<float>(1 - o); // Time offset if filter has even length
float g = 0.0f; // Gain float g = 0.0f; // Gain
float fc1; // Cutoff frequencies
// Sanity check // Sanity check
if (n == 0) if (n == 0)
@ -139,10 +141,6 @@ static float* DesignFIR(unsigned int n, float fc, float opt)
// Get window coefficients // Get window coefficients
Hamming(n, w); Hamming(n, w);
// Cutoff frequency must be < 0.5 where 0.5 <=> Fs/2
fc1 = MathUtil::Clamp(fc, 0.001f, 1.0f) / 2;
k1 *= fc1;
// Low pass filter // Low pass filter
// If the filter length is odd, there is one point which is exactly // If the filter length is odd, there is one point which is exactly