fix: bug when autocall for cw keyer is on which was

autocalling no matter which macro now only on CQ
fix: ESC stop transmission but also autocall

internal/cwdecode/cwdecode_test.go

@@ -17,6 +17,10 @@ func charToMorse() map[byte]string {
 
 // keyMessage synthesizes a clean keyed tone for msg at the given WPM/pitch.
 func keyMessage(msg string, fs, wpm int, pitch float64) []int16 {
+	return keyMessageAmp(msg, fs, wpm, pitch, 9000)
+}
+
+func keyMessageAmp(msg string, fs, wpm int, pitch, amp float64) []int16 {
 	dot := fs * 1200 / (wpm * 1000) // samples per dot
 	c2m := charToMorse()
 	var out []int16
@@ -25,7 +29,7 @@ func keyMessage(msg string, fs, wpm int, pitch float64) []int16 {
 
 	tone := func(n int) {
 		for i := 0; i < n; i++ {
-			out = append(out, int16(9000*math.Sin(phase)))
+			out = append(out, int16(amp*math.Sin(phase)))
 			phase += dphi
 		}
 	}
@@ -79,6 +83,41 @@ func TestDecodeCleanSignal(t *testing.T) {
 	}
 }
 
+func TestDecodeWithQRM(t *testing.T) {
+	const fs = 16000
+	// Target at 700 Hz; a strong interfering keyed signal at 950 Hz, slightly
+	// quieter, sending different text. The pitch lock should hold on the target.
+	target := keyMessageAmp("PARIS PARIS PARIS", fs, 20, 700, 9000)
+	qrm := keyMessageAmp("BK DE QRZ QRZ TEST", fs, 26, 950, 6500)
+	mix := make([]int16, len(target))
+	for i := range target {
+		v := int(target[i])
+		if i < len(qrm) {
+			v += int(qrm[i])
+		}
+		if v > 32767 {
+			v = 32767
+		} else if v < -32768 {
+			v = -32768
+		}
+		mix[i] = int16(v)
+	}
+
+	var sb strings.Builder
+	d := New(fs, func(s string) { sb.WriteString(s) }, nil)
+	for i := 0; i < len(mix); i += 256 {
+		end := i + 256
+		if end > len(mix) {
+			end = len(mix)
+		}
+		d.Process(mix[i:end])
+	}
+	got := strings.ToUpper(sb.String())
+	if !strings.Contains(got, "PARIS") {
+		t.Fatalf("with QRM, decoded %q, want it to contain PARIS", got)
+	}
+}
+
 func TestDecodeNumbersAndProsign(t *testing.T) {
 	const fs = 16000
 	var sb strings.Builder