59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
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#pragma once
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#include <mmdeviceapi.h>
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#include <mmsystem.h>
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#include "backend.h"
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#define WASAPI_BUFFER_COUNT 3
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#define TARGET_REFTIME (100000) // 10 ms
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struct WaveOutBackend final : AudioBackend {
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public:
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~WaveOutBackend() final = default;
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HRESULT init(uint32_t buffer_size);
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const WAVEFORMATEXTENSIBLE &format() const noexcept override;
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HRESULT on_initialize(
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AUDCLNT_SHAREMODE *ShareMode,
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DWORD *StreamFlags,
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REFERENCE_TIME *hnsBufferDuration,
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REFERENCE_TIME *hnsPeriodicity,
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const WAVEFORMATEX *pFormat,
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LPCGUID AudioSessionGuid) noexcept override;
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HRESULT on_get_buffer_size(uint32_t *buffer_frames) noexcept override;
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HRESULT on_get_stream_latency(REFERENCE_TIME *latency) noexcept override;
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HRESULT on_get_current_padding(std::optional<uint32_t> &padding_frames) noexcept override;
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HRESULT on_is_format_supported(
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AUDCLNT_SHAREMODE *ShareMode,
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const WAVEFORMATEX *pFormat,
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WAVEFORMATEX **ppClosestMatch) noexcept override;
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HRESULT on_get_mix_format(WAVEFORMATEX **pp_device_format) noexcept override;
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HRESULT on_get_device_period(
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REFERENCE_TIME *default_device_period,
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REFERENCE_TIME *minimum_device_period) override;
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HRESULT on_start() noexcept override;
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HRESULT on_stop() noexcept override;
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HRESULT on_set_event_handle(HANDLE *event_handle) override;
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HRESULT on_get_buffer(uint32_t num_frames_requested, BYTE **ppData) override;
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HRESULT on_release_buffer(uint32_t num_frames_written, DWORD dwFlags) override;
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private:
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WrappedIAudioClient *client;
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bool initialized = false;
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HANDLE relay_event = nullptr;
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HANDLE dispatcher_event = nullptr;
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HWAVEOUT handle = nullptr;
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WAVEHDR hdrs[WASAPI_BUFFER_COUNT] {};
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BYTE *active_sound_buffer = nullptr;
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};
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