S4 Tier 0: the bank plays — VST3 marshals MIDI to the S3 core, reads the live bank + resolves WAV the M4 way, mono downmix, lock-free load handoff, LICE sample-pick

src/vst/bridge_marshal.cpp

@@ -13,66 +13,4 @@ std::optional<std::string> decodeGetProjExtState(int apiReturn,
     return buffer;
 }
 
-std::optional<std::string> extractJsonStringField(const std::string& json,
-                                                  const std::string& key) {
-    // Find the member token: "key" followed (after optional whitespace) by ':' then a
-    // quoted string. Scan for each candidate occurrence of the quoted key so a value
-    // that happens to contain the key text can't produce a false match.
-    const std::string needle = "\"" + key + "\"";
-    size_t searchFrom = 0;
-
-    while (true) {
-        const size_t keyPos = json.find(needle, searchFrom);
-        if (keyPos == std::string::npos) return std::nullopt;
-
-        size_t i = keyPos + needle.size();
-        searchFrom = i;  // next candidate starts after this key token
-
-        // Skip whitespace to the ':'.
-        while (i < json.size() &&
-               (json[i] == ' ' || json[i] == '\t' || json[i] == '\n' ||
-                json[i] == '\r')) {
-            ++i;
-        }
-        if (i >= json.size() || json[i] != ':') continue;  // not a member — keep looking
-        ++i;
-
-        // Skip whitespace to the value.
-        while (i < json.size() &&
-               (json[i] == ' ' || json[i] == '\t' || json[i] == '\n' ||
-                json[i] == '\r')) {
-            ++i;
-        }
-        if (i >= json.size() || json[i] != '"') return std::nullopt;  // value not a string
-        ++i;
-
-        // Read the string body, honoring the common JSON escapes.
-        std::string out;
-        while (i < json.size()) {
-            const char c = json[i];
-            if (c == '\\') {
-                if (i + 1 >= json.size()) return std::nullopt;  // dangling escape
-                const char e = json[i + 1];
-                switch (e) {
-                    case '"': out.push_back('"'); break;
-                    case '\\': out.push_back('\\'); break;
-                    case '/': out.push_back('/'); break;
-                    case 'n': out.push_back('\n'); break;
-                    case 't': out.push_back('\t'); break;
-                    case 'r': out.push_back('\r'); break;
-                    case 'b': out.push_back('\b'); break;
-                    case 'f': out.push_back('\f'); break;
-                    default: out.push_back(e); break;  // pass through unknown escapes
-                }
-                i += 2;
-                continue;
-            }
-            if (c == '"') return out;  // closing quote — done
-            out.push_back(c);
-            ++i;
-        }
-        return std::nullopt;  // unterminated string
-    }
-}
-
 }  // namespace reasampler::vst