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82 lines
2.8 KiB
C++
82 lines
2.8 KiB
C++
#pragma once
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#ifndef _WIN32
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#error "XAudio2 can only be built on Windows."
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#endif
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#include "Emu/Audio/AudioBackend.h"
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#include <initguid.h>
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#include <xaudio2.h>
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#include <wrl/client.h>
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#include <MMDeviceAPI.h>
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class XAudio2Backend final : public AudioBackend, public IXAudio2VoiceCallback, public IXAudio2EngineCallback, public IMMNotificationClient
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{
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public:
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XAudio2Backend();
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~XAudio2Backend() override;
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XAudio2Backend(const XAudio2Backend&) = delete;
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XAudio2Backend& operator=(const XAudio2Backend&) = delete;
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std::string_view GetName() const override { return "XAudio2"sv; }
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bool Initialized() override;
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bool Operational() override;
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bool DefaultDeviceChanged() override;
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bool Open(std::string_view dev_id, AudioFreq freq, AudioSampleSize sample_size, AudioChannelCnt ch_cnt, audio_channel_layout layout) override;
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void Close() override;
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f64 GetCallbackFrameLen() override;
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void Play() override;
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void Pause() override;
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private:
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static constexpr u32 INTERNAL_BUF_SIZE_MS = 25;
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Microsoft::WRL::ComPtr<IXAudio2> m_xaudio2_instance{};
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IXAudio2MasteringVoice* m_master_voice{};
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IXAudio2SourceVoice* m_source_voice{};
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bool m_com_init_success = false;
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Microsoft::WRL::ComPtr<IMMDeviceEnumerator> m_device_enumerator{};
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// Protected by state callback mutex
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std::string m_current_device{};
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bool m_default_dev_changed = false;
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std::vector<u8> m_data_buf{};
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std::array<u8, sizeof(float) * static_cast<u32>(AudioChannelCnt::SURROUND_7_1)> m_last_sample{};
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atomic_t<bool> m_reset_req = false;
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// XAudio voice callbacks
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void OnVoiceProcessingPassStart(UINT32 BytesRequired) override;
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void OnVoiceProcessingPassEnd() override {}
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void OnStreamEnd() override {}
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void OnBufferStart(void* /* pBufferContext */) override {}
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void OnBufferEnd(void* /* pBufferContext*/) override {}
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void OnLoopEnd(void* /* pBufferContext */) override {}
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void OnVoiceError(void* /* pBufferContext */, HRESULT /* Error */) override {}
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// XAudio engine callbacks
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void OnProcessingPassStart() override {};
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void OnProcessingPassEnd() override {};
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void OnCriticalError(HRESULT Error) override;
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// IMMNotificationClient callbacks
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IFACEMETHODIMP_(ULONG) AddRef() override { return 1; };
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IFACEMETHODIMP_(ULONG) Release() override { return 1; };
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IFACEMETHODIMP QueryInterface(REFIID /*iid*/, void** /*object*/) override { return E_NOINTERFACE; };
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IFACEMETHODIMP OnPropertyValueChanged(LPCWSTR /*device_id*/, const PROPERTYKEY /*key*/) override { return S_OK; };
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IFACEMETHODIMP OnDeviceAdded(LPCWSTR /*device_id*/) override { return S_OK; };
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IFACEMETHODIMP OnDeviceRemoved(LPCWSTR /*device_id*/) override { return S_OK; };
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IFACEMETHODIMP OnDeviceStateChanged(LPCWSTR /*device_id*/, DWORD /*new_state*/) override { return S_OK; };
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IFACEMETHODIMP OnDefaultDeviceChanged(EDataFlow flow, ERole role, LPCWSTR new_default_device_id) override;
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void CloseUnlocked();
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};
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