wip: filter (lp, hp, bp)

2023-09-07 23:53:29 +04:00
parent 868a59da0e
commit 5b97136f44
9 changed files with 168 additions and 0 deletions
--- a/src/BandPassFilter.cpp
+++ b/src/BandPassFilter.cpp
@@ -0,0 +1,17 @@
+#include "BandPassFilter.h"
+
+BandPassFilter::BandPassFilter(/* args */) {
+}
+
+BandPassFilter::~BandPassFilter() {
+}
+
+void BandPassFilter::calculate_coefficients() {
+    Filter::Normals base = calculate_normals();
+    m_norm = 1 / (1 + base.K / m_q + base.K * base.K);
+    m_a0 = base.K / m_q * m_norm;
+    m_a1 = 0;
+    m_a2 = -m_a0;
+    m_b1 = 2 * (base.K * base.K - 1) * m_norm;
+    m_b2 = (1 - base.K / m_q + base.K * base.K) * m_norm;
+}