117 lines
2.6 KiB
C++
117 lines
2.6 KiB
C++
// Copyright 2019 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <memory>
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#include <vector>
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#include "common/swap.h"
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#include "common/threadsafe_queue.h"
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namespace Frontend::Mic {
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enum class Signedness : u8 {
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Signed,
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Unsigned,
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};
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using Samples = std::vector<u8>;
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struct Parameters {
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Signedness sign;
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u8 sample_size;
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bool buffer_loop;
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u32 sample_rate;
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u32 buffer_offset;
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u32 buffer_size;
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};
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class Interface {
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public:
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Interface() = default;
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virtual ~Interface();
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/// Starts the microphone. Called by Core
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virtual void StartSampling(const Parameters& params) = 0;
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/// Stops the microphone. Called by Core
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virtual void StopSampling() = 0;
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/**
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* Called from the actual event timing at a constant period under a given sample rate.
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* When sampling is enabled this function is expected to return a buffer of 16 samples in ideal
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* conditions, but can be lax if the data is coming in from another source like a real mic.
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*/
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virtual Samples Read() = 0;
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/**
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* Adjusts the Parameters. Implementations should update the parameters field in addition to
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* changing the mic to sample according to the new parameters. Called by Core
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*/
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virtual void AdjustSampleRate(u32 sample_rate) = 0;
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/// Value from 0 - 100 to adjust the mic gain setting. Called by Core
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virtual void SetGain(u8 mic_gain) {
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gain = mic_gain;
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}
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u8 GetGain() const {
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return gain;
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}
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void SetPower(bool power) {
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powered = power;
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}
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bool GetPower() const {
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return powered;
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}
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bool IsSampling() const {
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return is_sampling;
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}
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const Parameters& GetParameters() const {
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return parameters;
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}
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protected:
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Parameters parameters;
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u8 gain = 0;
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bool is_sampling = false;
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bool powered = false;
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};
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class NullMic final : public Interface {
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public:
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void StartSampling(const Parameters& params) override;
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void StopSampling() override;
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void AdjustSampleRate(u32 sample_rate) override;
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Samples Read() override;
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};
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class StaticMic final : public Interface {
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public:
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StaticMic();
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~StaticMic() override;
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void StartSampling(const Parameters& params) override;
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void StopSampling() override;
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void AdjustSampleRate(u32 sample_rate) override;
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Samples Read() override;
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private:
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u16 sample_rate = 0;
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u8 sample_size = 0;
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std::vector<u8> CACHE_8_BIT;
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std::vector<u8> CACHE_16_BIT;
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};
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} // namespace Frontend::Mic
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