init

2026-10-24 14:03:52 +07:00
commit 4fe046de58
4790 changed files with 311146 additions and 0 deletions
@@ -0,0 +1,69 @@
+var VisioDTMF = {
+    context: null,
+    osc1: null,
+    osc2: null,
+    started: false,
+
+    setup: function () {
+        this.context = new window.AudioContext;
+        this.osc1 = this.context.createOscillator();
+        this.osc2 = this.context.createOscillator();
+
+        this.gainNode = this.context.createGain();
+        this.gainNode.gain.value = 0.25;
+
+        this.filter = this.context.createBiquadFilter();
+        this.filter.type = "lowpass";
+        this.filter.frequency = 8000;
+
+        this.osc1.connect(this.gainNode);
+        this.osc2.connect(this.gainNode);
+
+        this.gainNode.connect(this.filter);
+        this.filter.connect(this.context.destination);
+    },
+
+    pressButton(number) {
+        var dtmfFrequencies = {
+            "1": { f1: 697, f2: 1209 },
+            "2": { f1: 697, f2: 1336 },
+            "3": { f1: 697, f2: 1477 },
+            "4": { f1: 770, f2: 1209 },
+            "5": { f1: 770, f2: 1336 },
+            "6": { f1: 770, f2: 1477 },
+            "7": { f1: 852, f2: 1209 },
+            "8": { f1: 852, f2: 1336 },
+            "9": { f1: 852, f2: 1477 },
+            "*": { f1: 941, f2: 1209 },
+            "0": { f1: 941, f2: 1336 },
+            "#": { f1: 941, f2: 1477 }
+        }
+
+        let frequencies = dtmfFrequencies[number];
+
+        this.tone(frequencies.f1, frequencies.f2);
+    },
+
+    tone: function (freq1, freq2) {
+        if (this.started) this.stop();
+
+        this.setup();
+
+        this.osc1.frequency.value = freq1;
+        this.osc2.frequency.value = freq2;
+
+        this.osc1.start(0);
+        this.osc2.start(0);
+
+        this.started = true;
+    },
+
+    stop: function () {
+        this.osc1.stop(0);
+        this.osc2.stop(0);
+
+        this.started = false;
+    }
+}
+
+VisioDTMF.setup();