1 files changed, 53 insertions, 0 deletions
diff --git a/src/ui/audio/SequenceDriver.h b/src/ui/audio/SequenceDriver.h
new file mode 100644
index 0000000..9a34700
--- /dev/null
+++ b/src/ui/audio/SequenceDriver.h
@@ -0,0 +1,53 @@
+#pragma once
+
+#ifdef BUILD_UI
+
+#include <memory>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "Companion.h"
+#include "factories/BaseFactory.h"
+#include "ui/audio/SequenceSynth.h"
+
+// Sequence-format drivers: each game/library version interprets its own
+// sequence data into a RenderedAudio. Drivers register by asset type string;
+// SequencePreviewUI provides the playback controls for any registered type.
+namespace UI {
+
+class SequenceDriver {
+public:
+    virtual ~SequenceDriver() = default;
+    virtual bool Render(const ParseResultData& item, int option, RenderedAudio& out) = 0;
+    // Selectable render options (e.g. sound fonts); empty hides the picker.
+    virtual std::vector<std::string> Options(const ParseResultData& item) { return {}; }
+    // Initial option index (e.g. the font the game maps to this sequence).
+    virtual int DefaultOption(const ParseResultData& item) { return 0; }
+};
+
+inline std::unordered_map<std::string, std::shared_ptr<SequenceDriver>>& SequenceDrivers() {
+    static std::unordered_map<std::string, std::shared_ptr<SequenceDriver>> drivers;
+    return drivers;
+}
+
+inline void RegisterSequenceDriver(const std::string& type, std::shared_ptr<SequenceDriver> driver) {
+    SequenceDrivers()[type] = std::move(driver);
+}
+
+inline SequenceDriver* GetSequenceDriver(const std::string& type) {
+    auto& drivers = SequenceDrivers();
+    const auto it = drivers.find(type);
+    return it != drivers.end() ? it->second.get() : nullptr;
+}
+
+// Playback row (play/stop, volume, seek) for any asset type with a driver.
+class SequencePreviewUI : public BaseFactoryUI {
+public:
+    float GetItemHeight(const ParseResultData& data) override;
+    void DrawUI(const ParseResultData& data) override;
+};
+
+} // namespace UI
+
+#endif // BUILD_UI