Render in place: a track's output to a new sibling, source to the bench

src/core/capture/capture_name.cpp

@@ -86,4 +86,17 @@ CaptureName composeCaptureName(const CaptureNameInputs& in) {
     return out;
 }
 
+std::string captureTrackName(const std::string& sourceName) {
+    const std::string prefix(kCaptureTrackPrefix);
+    // A source with no readable name yields the bare word rather than a trailing
+    // space; both spellings are fixed points, which is what makes the whole function
+    // one (a track named exactly "Capture" must not become "Capture Capture").
+    const std::string bare = prefix.substr(0, prefix.size() - 1);
+
+    if (sourceName.empty()) return bare;
+    if (sourceName == bare) return sourceName;
+    if (sourceName.rfind(prefix, 0) == 0) return sourceName;
+    return prefix + sourceName;
+}
+
 } // namespace reasampler::capture