M5: capture editor state -> preset_b64 khi đóng GUI native (JuceFxLoop ghi <job>.preset.json + /fx-gui/close poll)

2026-09-04 11:49:42 +07:00
parent 14fd794e6d
commit 014b9ac460
3 changed files with 88 additions and 1 deletions
@@ -21,6 +21,7 @@
 #include <algorithm>
 #include <chrono>
 #include <cstring>
+#include <cstdio>
 #include <fstream>
 #include <iostream>
 #include <iterator>
@@ -79,6 +80,23 @@ std::string extractChainJson(const std::string& s) {
    return s.substr(p, i - p + 1);
 }

+// M5: base64 encode (RFC 4648) cho editor state capture -> file preset.
+static std::string base64Encode(const std::string& in) {
+    static const char* tbl =
+        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    std::string out;
+    out.reserve(((in.size() + 2) / 3) * 4);
+    for (size_t i = 0; i < in.size(); i += 3) {
+        unsigned a = (unsigned char)in[i];
+        unsigned b = i + 1 < in.size() ? (unsigned char)in[i + 1] : 0;
+        unsigned c = i + 2 < in.size() ? (unsigned char)in[i + 2] : 0;
+        out += tbl[a >> 2];
+        out += tbl[((a & 3) << 4) | (b >> 4)];
+        out += i + 1 < in.size() ? tbl[((b & 15) << 2) | (c >> 6)] : '=';
+        out += i + 2 < in.size() ? tbl[c & 63] : '=';
+    }
+    return out;
+}
 }  // namespace

 int run_juce_fx_loop(const std::string& jobPath, const std::string& shmName,
@@ -232,6 +250,37 @@ int run_juce_fx_loop(const std::string& jobPath, const std::string& shmName,
                engine.requestEditor(slot, act, w, h);
                std::cerr << "[JuceFxLoop] ctrl " << key << " slot=" << slot
                          << " w=" << w << " h=" << h << std::endl;
+                // M5: capture state editor (GUI đóng → preset về project như
+                // WM_FXGUI_CAPTURE cũ). PumpEditorQueue (GUI tick 30ms) thực thi
+                // Capture → captured[slot] (raw). Ctrl thread đợi tối đa 3s rồi
+                // base64 + ghi file JSON cạnh job: <jobPath>.preset.json
+                // {slot, preset_b64}. Python /fx-gui/close poll file này (xoá file
+                // cũ trước — chỉ đọc file MỚI cho capture lần này).
+                if (act == JuceFxEngine::EditorAction::Capture) {
+                    const std::string capFile = jobPath + ".preset.json";
+                    std::remove(capFile.c_str());
+                    std::string raw;
+                    for (int i = 0; i < 300 && raw.empty(); ++i) {
+                        sleepMs(10);
+                        if (!ipc->h.running || ipc->h.state != FXRT_STATE_READY)
+                            break;
+                        raw = engine.takeCapturedState(slot);
+                    }
+                    if (!raw.empty()) {
+                        const std::string b64 = base64Encode(raw);
+                        std::ofstream f(capFile, std::ios::binary);
+                        f << "{\"slot\":" << slot << ",\"preset_b64\":\""
+                          << b64 << "\"}" << std::endl;
+                        std::cerr << "[JuceFxLoop] capture slot=" << slot
+                                  << " -> " << capFile << " (" << raw.size()
+                                  << " bytes, " << b64.size() << " b64)"
+                                  << std::endl;
+                    } else {
+                        std::cerr << "[JuceFxLoop] capture slot=" << slot
+                                  << " rỗng — plugin không có state" << std::endl;
+                    }
+                }
+
            }
            sleepMs(2);
        }