Implement proper microphone support (#251)

src/audio/IAudioInputAPI.h

@@ -0,0 +1,71 @@
+#pragma once
+
+class IAudioInputAPI
+{
+	friend class GeneralSettings2;
+
+public:
+	class DeviceDescription
+	{
+	public:
+		explicit DeviceDescription(std::wstring name)
+			: m_name(std::move(name)) { }
+
+		virtual ~DeviceDescription() = default;
+		virtual std::wstring GetIdentifier() const = 0;
+		const std::wstring& GetName() const { return m_name; }
+
+		bool operator==(const DeviceDescription& o) const
+		{
+			return GetIdentifier() == o.GetIdentifier();
+		}
+
+	private:
+		std::wstring m_name;
+	};
+
+	using DeviceDescriptionPtr = std::shared_ptr<DeviceDescription>;
+
+	enum AudioInputAPI
+	{
+		Cubeb,
+
+		AudioInputAPIEnd,
+	};
+	static constexpr uint32 kBlockCount = 24;
+
+	IAudioInputAPI(uint32 samplerate, uint32 channels, uint32 samples_per_block, uint32 bits_per_sample);
+	virtual ~IAudioInputAPI() = default;
+	virtual AudioInputAPI GetType() const = 0;
+
+	sint32 GetChannels() const { return m_channels; }
+
+	virtual sint32 GetVolume() const { return m_volume; }
+	virtual void SetVolume(sint32 volume) { m_volume = volume; }
+
+	virtual bool ConsumeBlock(sint16* data) = 0;
+	virtual bool Play() = 0;
+	virtual bool Stop() = 0;
+	virtual bool IsPlaying() const = 0;
+
+	static void PrintLogging();
+	static void InitializeStatic();
+	static bool IsAudioInputAPIAvailable(AudioInputAPI api);
+
+	static std::unique_ptr<IAudioInputAPI> CreateDevice(AudioInputAPI api, const DeviceDescriptionPtr& device, sint32 samplerate, sint32 channels, sint32 samples_per_block, sint32 bits_per_sample);
+	static std::vector<DeviceDescriptionPtr> GetDevices(AudioInputAPI api);
+
+protected:
+	uint32 m_samplerate, m_channels, m_samplesPerBlock, m_bitsPerSample;
+	uint32 m_bytesPerBlock;
+
+	sint32 m_volume = 0;
+
+	static std::array<bool, AudioInputAPIEnd> s_availableApis;
+
+private:
+};
+
+using AudioInputAPIPtr = std::unique_ptr<IAudioInputAPI>;
+extern std::shared_mutex g_audioInputMutex;
+extern AudioInputAPIPtr g_inputAudio;