added discord game sdk

src/discord-game-sdk-cpp/voice_manager.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "types.h"
+
+namespace discord {
+
+class VoiceManager final {
+public:
+    ~VoiceManager() = default;
+
+    Result GetInputMode(InputMode* inputMode);
+    void SetInputMode(InputMode inputMode, std::function<void(Result)> callback);
+    Result IsSelfMute(bool* mute);
+    Result SetSelfMute(bool mute);
+    Result IsSelfDeaf(bool* deaf);
+    Result SetSelfDeaf(bool deaf);
+    Result IsLocalMute(Snowflake userId, bool* mute);
+    Result SetLocalMute(Snowflake userId, bool mute);
+    Result GetLocalVolume(Snowflake userId, std::uint8_t* volume);
+    Result SetLocalVolume(Snowflake userId, std::uint8_t volume);
+
+    Event<> OnSettingsUpdate;
+
+private:
+    friend class Core;
+
+    VoiceManager() = default;
+    VoiceManager(VoiceManager const& rhs) = delete;
+    VoiceManager& operator=(VoiceManager const& rhs) = delete;
+    VoiceManager(VoiceManager&& rhs) = delete;
+    VoiceManager& operator=(VoiceManager&& rhs) = delete;
+
+    IDiscordVoiceManager* internal_;
+    static IDiscordVoiceEvents events_;
+};
+
+} // namespace discord