Implement audio mixing

src/AudioManager.h

@@ -0,0 +1,44 @@
+#pragma once
+
+#include "Common.h"
+
+#include "FileManager.h"
+#include <SDL2/SDL.h>
+
+namespace NGame {
+
+class TAudioManager {
+public:
+    TAudioManager(TFileManager& fileManager);
+    DELETE_COPY(TAudioManager)
+
+    void Run();
+    void Play(const std::string& sound);
+    void Paint(SDL_AudioStream* stream, std::uint32_t ticks);
+
+private:
+    struct TSound {
+        SDL_AudioSpec Spec;
+        std::uint8_t* Data;
+        std::uint32_t Size;
+    };
+
+    struct TSoundChannel {
+        bool InUse;
+        TSound* Sound;
+        std::uint32_t Position;
+    };
+
+private:
+    TSound* Load(const std::string& sound);
+
+private:
+    TFileManager& FileManager_;
+    TSoundChannel Channels_[16];
+    std::unordered_map<std::string, TSound*> Sounds_;
+    SDL_AudioDeviceID Device_;
+    SDL_AudioStream* Stream_;
+    std::uint32_t LastTick_;
+};
+
+} // namespace NGame