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

src/core/capture/capture_paths.cpp

@@ -45,16 +45,25 @@ std::string sanitizeStem(const std::string& baseName) {
     return out;
 }
 
-BankPaths deriveBankPaths(const std::string& projectDir,
-                          const std::string& baseName,
-                          const std::string& uniqueTag) {
-    const std::string dir = normalizeSlashes(projectDir);
-
+RenderPaths deriveRenderPaths(const std::string& absoluteDir,
+                              const std::string& baseName,
+                              const std::string& uniqueTag) {
     std::string stem = sanitizeStem(baseName);
     if (!uniqueTag.empty()) {
         stem += "_" + sanitizeStem(uniqueTag);
     }
-    const std::string fileName = stem + ".wav";
+
+    RenderPaths r;
+    r.fileStem    = stem;              // stem only — REAPER appends the extension
+    r.fileName    = stem + ".wav";
+    r.absoluteDir = normalizeSlashes(absoluteDir);
+    return r;
+}
+
+BankPaths deriveBankPaths(const std::string& projectDir,
+                          const std::string& baseName,
+                          const std::string& uniqueTag) {
+    const std::string dir = normalizeSlashes(projectDir);
 
     // Precondition: caller must resolve a non-empty project directory — an
     // empty one would otherwise fall back to a bare relative path (forbidden).
@@ -62,18 +71,19 @@ BankPaths deriveBankPaths(const std::string& projectDir,
     // ignores it fails at the render/stat step, not silently onto CWD.
     assert(!dir.empty() && "deriveBankPaths: projectDir must not be empty");
 
+    const RenderPaths r = deriveRenderPaths(
+        dir.empty() ? std::string{} : dir + "/" + kBankSubfolder, baseName, uniqueTag);
+
     BankPaths p;
-    p.fileStem     = stem;                                    // stem only — REAPER appends extension
-    p.fileName     = fileName;
-    p.relativePath = std::string(kBankSubfolder) + "/" + fileName;
-    p.absoluteDir  = dir.empty() ? std::string{}
-                                 : dir + "/" + kBankSubfolder;
+    p.fileStem     = r.fileStem;
+    p.fileName     = r.fileName;
+    p.relativePath = bankRelativeForName(r.fileName);
+    p.absoluteDir  = r.absoluteDir;
     return p;
 }
 
 std::string bankRelativeForName(const std::string& fileName) {
     if (fileName.empty()) return {};
-    // Same expression deriveBankPaths uses, so the two spellings can't drift.
     return std::string(kBankSubfolder) + "/" + fileName;
 }