up

internal/audio/recorder.go

@@ -5,11 +5,26 @@ package audio
 import (
 	"encoding/binary"
 	"fmt"
+	"runtime/debug"
 	"strings"
 	"sync"
 	"time"
 )
 
+// LogSink receives audio-subsystem diagnostics (set to applog.Printf at startup).
+// Defaults to a no-op so the package is usable without wiring.
+var LogSink = func(string, ...any) {}
+
+// recoverGoroutine turns a panic in a long-running audio goroutine into a logged
+// event with a stack trace instead of a silent process-killing crash. (It can't
+// catch a hard Windows access violation from the WASAPI layer — those are fatal
+// — but it catches any Go-level panic in capture/mix.)
+func recoverGoroutine(what string) {
+	if r := recover(); r != nil {
+		LogSink("audio: PANIC in %s: %v\n%s", what, r, debug.Stack())
+	}
+}
+
 // Recorder continuously captures audio into a rolling pre-roll buffer so a QSO
 // recording can begin a few seconds BEFORE the operator entered the callsign.
 // It optionally mixes two sources (the rig RX "From Radio" + your mic) into a
@@ -108,6 +123,7 @@ func (r *Recorder) Start(fromDev, micDev string, prerollSec int) error {
 	r.wg.Add(1)
 	go func() {
 		defer r.wg.Done()
+		defer recoverGoroutine("recorder capture (radio)")
 		_ = captureStream(fromDev, stop, func(chunk []byte) {
 			s := bytesToInt16(chunk)
 			r.srcMu.Lock()
@@ -119,6 +135,7 @@ func (r *Recorder) Start(fromDev, micDev string, prerollSec int) error {
 		r.wg.Add(1)
 		go func() {
 			defer r.wg.Done()
+			defer recoverGoroutine("recorder capture (mic)")
 			_ = captureStream(micDev, stop, func(chunk []byte) {
 				s := bytesToInt16(chunk)
 				r.srcMu.Lock()
@@ -132,6 +149,7 @@ func (r *Recorder) Start(fromDev, micDev string, prerollSec int) error {
 	r.wg.Add(1)
 	go func() {
 		defer r.wg.Done()
+		defer recoverGoroutine("recorder mixer")
 		t := time.NewTicker(40 * time.Millisecond)
 		defer t.Stop()
 		for {