More work. Audio driver works enough to play music now.

GpAudioDriver_XAudio2/GpAudioChannelXAudio2.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include "IGpAudioChannel.h"
+
+#include "GpAudioChannelXAudio2Callbacks.h"
+
+class GpAudioDriverXAudio2;
+class GpAudioChannelXAudio2Callbacks;
+struct IXAudio2SourceVoice;
+
+class GpAudioChannelXAudio2 final : public IGpAudioChannel
+{
+public:
+	friend class GpAudioChannelXAudio2Callbacks;
+
+	static GpAudioChannelXAudio2 *Create(GpAudioDriverXAudio2 *driver);
+
+	void SetAudioChannelContext(IGpAudioChannelCallbacks *callbacks);
+	void PostBuffer(const void *buffer, size_t bufferSize);
+	void Destroy() override;
+
+	bool Init();
+
+protected:
+	void OnBufferEnd();
+
+private:
+	enum VoiceState
+	{
+		VoiceState_Idle,
+		VoiceState_Active,
+	};
+
+	explicit GpAudioChannelXAudio2(GpAudioDriverXAudio2 *driver);
+	~GpAudioChannelXAudio2();
+
+	GpAudioDriverXAudio2 *m_driver;
+	IXAudio2SourceVoice *m_sourceVoice;
+	GpAudioChannelXAudio2Callbacks m_xAudioCallbacks;
+	IGpAudioChannelCallbacks *m_contextCallbacks;
+	VoiceState m_voiceState;
+};