diff options
Diffstat (limited to 'Source/Core/AudioCommon/DPL2Decoder.cpp')
| -rw-r--r-- | Source/Core/AudioCommon/DPL2Decoder.cpp | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/Source/Core/AudioCommon/DPL2Decoder.cpp b/Source/Core/AudioCommon/DPL2Decoder.cpp index 6c8be523bf..9ac95a26d1 100644 --- a/Source/Core/AudioCommon/DPL2Decoder.cpp +++ b/Source/Core/AudioCommon/DPL2Decoder.cpp @@ -122,13 +122,15 @@ returns 0 if OK, -1 if fail */ static float* DesignFIR(unsigned int n, float fc, float opt) { - unsigned int o = n & 1; // Indicator for odd filter length - unsigned int end = ((n + 1) >> 1) - o; // Loop end + const unsigned int o = n & 1; // Indicator for odd filter length + const unsigned int end = ((n + 1) >> 1) - o; // Loop end - float k1 = 2 * float(M_PI); // 2*pi*fc1 - float k2 = 0.5f * (float)(1 - o); // Constant used if the filter has even length - float g = 0.0f; // Gain - float fc1; // Cutoff frequencies + // Cutoff frequency must be < 0.5 where 0.5 <=> Fs/2 + 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 // Sanity check if (n == 0) @@ -139,10 +141,6 @@ static float* DesignFIR(unsigned int n, float fc, float opt) // Get window coefficients 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 // If the filter length is odd, there is one point which is exactly |