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Diffstat (limited to 'libs/qm-dsp/base/Window.h')
-rw-r--r--libs/qm-dsp/base/Window.h16
1 files changed, 8 insertions, 8 deletions
diff --git a/libs/qm-dsp/base/Window.h b/libs/qm-dsp/base/Window.h
index 5d6168e7ee..686d023c6b 100644
--- a/libs/qm-dsp/base/Window.h
+++ b/libs/qm-dsp/base/Window.h
@@ -46,7 +46,7 @@ public:
return *this;
}
virtual ~Window() { delete[] m_cache; }
-
+
void cut(T *src) const { cut(src, src); }
void cut(const T *src, T *dst) const {
for (size_t i = 0; i < m_size; ++i) dst[i] = src[i] * m_cache[i];
@@ -59,7 +59,7 @@ protected:
WindowType m_type;
size_t m_size;
T *m_cache;
-
+
void encache();
};
@@ -78,40 +78,40 @@ void Window<T>::encache()
mult[i] = mult[i] * 0.5;
}
break;
-
+
case BartlettWindow:
for (i = 0; i < n/2; ++i) {
mult[i] = mult[i] * (i / T(n/2));
mult[i + n/2] = mult[i + n/2] * (1.0 - (i / T(n/2)));
}
break;
-
+
case HammingWindow:
for (i = 0; i < n; ++i) {
mult[i] = mult[i] * (0.54 - 0.46 * cos(2 * M_PI * i / n));
}
break;
-
+
case HanningWindow:
for (i = 0; i < n; ++i) {
mult[i] = mult[i] * (0.50 - 0.50 * cos(2 * M_PI * i / n));
}
break;
-
+
case BlackmanWindow:
for (i = 0; i < n; ++i) {
mult[i] = mult[i] * (0.42 - 0.50 * cos(2 * M_PI * i / n)
+ 0.08 * cos(4 * M_PI * i / n));
}
break;
-
+
case GaussianWindow:
for (i = 0; i < n; ++i) {
mult[i] = mult[i] * exp((-1.0 / (n*n)) * ((T(2*i) - n) *
(T(2*i) - n)));
}
break;
-
+
case ParzenWindow:
for (i = 0; i < n; ++i) {
mult[i] = mult[i] * (1.0 - fabs((T(2*i) - n) / T(n + 1)));