From f3e30f3aa7d4cb83da52cccee616b6404a55191a Mon Sep 17 00:00:00 2001
From: Oleg Borodin <onborodin@gmail.com>
Date: Sat, 10 Sep 2022 22:29:22 +0200
Subject: [PATCH] added mixer0.c

---
 tests/mixer0.c | 104 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 tests/mixer0.c

diff --git a/tests/mixer0.c b/tests/mixer0.c
new file mode 100644
index 0000000..e4ef19c
--- /dev/null
+++ b/tests/mixer0.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2022 Oleg Borodin  <borodin@unix7.org>
+ */
+
+
+#include <stdio.h>
+#include <stdint.h>
+
+
+#define ICOUNT 16
+#define OCOUNT 16
+#define RCOUNT 16
+
+
+typedef struct {
+    int i;
+    int o;
+    double k;
+} rule_t;
+
+typedef struct {
+    double* i[ICOUNT];
+    double* o[OCOUNT];
+
+    rule_t r[RCOUNT];
+} mixer_t;
+
+
+void mixer_init(mixer_t* mix) {
+    for (int i = 0; i < ICOUNT; i++) {
+        mix->i[i] = NULL;
+    }
+    for (int i = 0; i < OCOUNT; i++) {
+        mix->o[i] = NULL;
+    }
+    for (int i = 0; i < RCOUNT; i++) {
+        mix->r[i].i = -1;
+        mix->r[i].o = -1;
+        mix->r[i].k = 0.0;
+    }
+}
+
+void mixer_iset(mixer_t* mix, int n, double* i) {
+    mix->i[n] = i;
+}
+
+void mixer_oset(mixer_t* mix, int n, double* o) {
+    mix->o[n] = o;
+}
+
+void mixer_rset(mixer_t* mix, int n, int i, int o, double k) {
+    mix->r[n].i = i;
+    mix->r[n].o = o;
+    mix->r[n].k = k;
+}
+
+void mixer_apply(mixer_t* mix) {
+    for (int ridx = 0; ridx < RCOUNT; ridx++) {
+
+        int iidx = mix->r[ridx].i;
+        int oidx = mix->r[ridx].o;
+
+        if (iidx < 0) continue;
+        if (oidx < 0) continue;
+
+        if (mix->i[iidx] == NULL) continue;
+        if (mix->o[oidx] == NULL) continue;
+
+
+        *(mix->o[oidx]) += *(mix->i[iidx]) * mix->r[ridx].k;
+    }
+}
+
+
+int main(int argc, char **argv) {
+
+    mixer_t mix;
+    mixer_init(&mix);
+
+    double ix =  10.0;
+    double iy =  -15.0;
+
+    double ox = 0.0;
+    double oy = 0.0;
+
+    mixer_iset(&mix, 0, &ix);
+    mixer_iset(&mix, 1, &iy);
+
+    mixer_oset(&mix, 0, &ox);
+    mixer_oset(&mix, 1, &oy);
+
+    mixer_rset(&mix, 0, 0, 0,  0.5);
+    mixer_rset(&mix, 1, 1, 1,  0.5);
+    mixer_rset(&mix, 2, 0, 1,  0.5);
+    mixer_rset(&mix, 3, 1, 0, -0.5);
+
+
+    mixer_apply(&mix);
+
+    printf("ox=%10.3f\n", ox);
+    printf("yx=%10.3f\n", oy);
+
+    return 0;
+}