feat: Add streaming handlers for live TV proxying and VOD HLS transcoding using FFmpeg.

windows/flutter/ephemeral/cpp_client_wrapper/flutter_view_controller.cc

@@ -0,0 +1,53 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "include/flutter/flutter_view_controller.h"
+
+#include <algorithm>
+#include <iostream>
+
+namespace flutter {
+
+FlutterViewController::FlutterViewController(int width,
+                                             int height,
+                                             const DartProject& project) {
+  engine_ = std::make_shared<FlutterEngine>(project);
+  controller_ = FlutterDesktopViewControllerCreate(width, height,
+                                                   engine_->RelinquishEngine());
+  if (!controller_) {
+    std::cerr << "Failed to create view controller." << std::endl;
+    return;
+  }
+  view_ = std::make_unique<FlutterView>(
+      FlutterDesktopViewControllerGetView(controller_));
+}
+
+FlutterViewController::~FlutterViewController() {
+  if (controller_) {
+    FlutterDesktopViewControllerDestroy(controller_);
+  }
+}
+
+FlutterViewId FlutterViewController::view_id() const {
+  auto view_id = FlutterDesktopViewControllerGetViewId(controller_);
+
+  return static_cast<FlutterViewId>(view_id);
+}
+
+void FlutterViewController::ForceRedraw() {
+  FlutterDesktopViewControllerForceRedraw(controller_);
+}
+
+std::optional<LRESULT> FlutterViewController::HandleTopLevelWindowProc(
+    HWND hwnd,
+    UINT message,
+    WPARAM wparam,
+    LPARAM lparam) {
+  LRESULT result;
+  bool handled = FlutterDesktopViewControllerHandleTopLevelWindowProc(
+      controller_, hwnd, message, wparam, lparam, &result);
+  return handled ? result : std::optional<LRESULT>(std::nullopt);
+}
+
+}  // namespace flutter