diff options
Diffstat (limited to 'Source/Core/AudioCommon/DPL2Decoder.cpp')
| -rw-r--r-- | Source/Core/AudioCommon/DPL2Decoder.cpp | 35 |
1 files changed, 18 insertions, 17 deletions
diff --git a/Source/Core/AudioCommon/DPL2Decoder.cpp b/Source/Core/AudioCommon/DPL2Decoder.cpp index 355d721e15..4025a073c5 100644 --- a/Source/Core/AudioCommon/DPL2Decoder.cpp +++ b/Source/Core/AudioCommon/DPL2Decoder.cpp @@ -80,9 +80,9 @@ static T FIRFilter(const T *buf, int pos, int len, int count, const float *coeff // high part of window const T *ptr = &buf[pos]; - float r1=DotProduct(count1,ptr,coefficients);coefficients+=count1; - float r2=DotProduct(count2,buf,coefficients); - return T(r1+r2); + float r1 = DotProduct(count1, ptr, coefficients); coefficients += count1; + float r2 = DotProduct(count2, buf, coefficients); + return T(r1 + r2); } /* @@ -96,7 +96,7 @@ static T FIRFilter(const T *buf, int pos, int len, int count, const float *coeff */ static void Hamming(int n, float* w) { - float k = float(2*M_PI/((float)(n-1))); // 2*pi/(N-1) + float k = float(2*M_PI/((float)(n - 1))); // 2*pi/(N-1) // Calculate window coefficients for (int i = 0; i < n; i++) @@ -122,27 +122,28 @@ 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 o = *n & 1; // Indicator for odd filter length 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 g = 0.0f; // Gain float t1; // Temporary variables float fc1; // Cutoff frequencies // Sanity check - if (*n==0) return nullptr; - MathUtil::Clamp(&fc[0],float(0.001),float(1)); + if (*n == 0) + return nullptr; + MathUtil::Clamp(&fc[0], float(0.001), float(1)); - float *w=(float*)calloc(sizeof(float),*n); + float *w = (float*)calloc(sizeof(float), *n); // Get window coefficients - Hamming(*n,w); + Hamming(*n, w); - fc1=*fc; + fc1 = *fc; // Cutoff frequency must be < 0.5 where 0.5 <=> Fs/2 - fc1 = ((fc1 <= 1.0) && (fc1 > 0.0)) ? fc1/2 : 0.25f; + fc1 = ((fc1 <= 1.0) && (fc1 > 0.0)) ? fc1 / 2 : 0.25f; k1 *= fc1; // Low pass filter @@ -154,20 +155,20 @@ static float* DesignFIR(unsigned int *n, float* fc, float opt) if (o) { w[end] = fc1 * w[end] * 2.0f; - g=w[end]; + g = w[end]; } // Create filter for (u32 i = 0; i < end; i++) { - t1 = (float)(i+1) - k2; - w[end-i-1] = w[*n-end+i] = float(w[end-i-1] * sin(k1 * t1)/(M_PI * t1)); // Sinc - g += 2*w[end-i-1]; // Total gain in filter + t1 = (float)(i + 1) - k2; + w[end - i - 1] = w[*n - end + i] = float(w[end - i - 1] * sin(k1 * t1)/(M_PI * t1)); // Sinc + g += 2*w[end - i - 1]; // Total gain in filter } // Normalize gain - g=1/g; + g = 1/g; for (u32 i = 0; i < *n; i++) w[i] *= g; |