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63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
#pragma once
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#include <memory>
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#include "Utilities/mutex.h"
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#include "util/atomic.hpp"
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#include "Emu/Audio/AudioBackend.h"
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#include "cubeb/cubeb.h"
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class CubebBackend final : public AudioBackend
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{
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public:
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CubebBackend();
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~CubebBackend() override;
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CubebBackend(const CubebBackend&) = delete;
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CubebBackend& operator=(const CubebBackend&) = delete;
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std::string_view GetName() const override { return "Cubeb"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) 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 f64 AUDIO_MIN_LATENCY = 512.0 / 48000; // 10ms
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cubeb* m_ctx = nullptr;
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cubeb_stream* m_stream = nullptr;
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#ifdef _WIN32
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bool m_com_init_success = false;
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#endif
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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<u8> full_sample_size = 0;
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atomic_t<bool> m_reset_req = false;
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shared_mutex m_dev_sw_mutex{};
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std::string m_current_device{};
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bool m_default_dev_changed = false;
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bool m_dev_collection_cb_enabled = false;
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// Cubeb callbacks
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static long data_cb(cubeb_stream* stream, void* user_ptr, void const* input_buffer, void* output_buffer, long nframes);
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static void state_cb(cubeb_stream* stream, void* user_ptr, cubeb_state state);
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static void device_collection_changed_cb(cubeb* context, void* user_ptr);
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void CloseUnlocked();
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std::tuple<cubeb_devid, std::string /* dev_ident */, u32 /* ch_cnt */> GetDevice(std::string_view dev_id = "");
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std::tuple<cubeb_devid, std::string /* dev_ident */, u32 /* ch_cnt */> GetDefaultDeviceAlt(AudioFreq freq, AudioSampleSize sample_size, AudioChannelCnt ch_cnt);
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};
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