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

windows/flutter/ephemeral/cpp_client_wrapper/binary_messenger_impl.h

@@ -0,0 +1,50 @@
+// 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.
+
+#ifndef FLUTTER_SHELL_PLATFORM_COMMON_CLIENT_WRAPPER_BINARY_MESSENGER_IMPL_H_
+#define FLUTTER_SHELL_PLATFORM_COMMON_CLIENT_WRAPPER_BINARY_MESSENGER_IMPL_H_
+
+#include <flutter_messenger.h>
+
+#include <map>
+#include <string>
+
+#include "include/flutter/binary_messenger.h"
+
+namespace flutter {
+
+// Wrapper around a FlutterDesktopMessengerRef that implements the
+// BinaryMessenger API.
+class BinaryMessengerImpl : public BinaryMessenger {
+ public:
+  explicit BinaryMessengerImpl(FlutterDesktopMessengerRef core_messenger);
+
+  virtual ~BinaryMessengerImpl();
+
+  // Prevent copying.
+  BinaryMessengerImpl(BinaryMessengerImpl const&) = delete;
+  BinaryMessengerImpl& operator=(BinaryMessengerImpl const&) = delete;
+
+  // |flutter::BinaryMessenger|
+  void Send(const std::string& channel,
+            const uint8_t* message,
+            size_t message_size,
+            BinaryReply reply) const override;
+
+  // |flutter::BinaryMessenger|
+  void SetMessageHandler(const std::string& channel,
+                         BinaryMessageHandler handler) override;
+
+ private:
+  // Handle for interacting with the C API.
+  FlutterDesktopMessengerRef messenger_;
+
+  // A map from channel names to the BinaryMessageHandler that should be called
+  // for incoming messages on that channel.
+  std::map<std::string, BinaryMessageHandler> handlers_;
+};
+
+}  // namespace flutter
+
+#endif  // FLUTTER_SHELL_PLATFORM_COMMON_CLIENT_WRAPPER_BINARY_MESSENGER_IMPL_H_