43 lines
1.7 KiB
C++
43 lines
1.7 KiB
C++
#pragma once
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#include "FluidSim/SimulationRingBuffer.hpp"
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#include <SFML/Audio/SoundStream.hpp>
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#include <array>
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#include <atomic>
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#include <cstdint>
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namespace fluidsim::port {
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class AudioOutputStream final : public sf::SoundStream {
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public:
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explicit AudioOutputStream(SimulationRingBuffer& ring, unsigned int sample_rate = 44100);
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void set_speed(double speed) { speed_.store(speed, std::memory_order_relaxed); }
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std::uint64_t underrun_blocks() const { return underrun_blocks_.load(std::memory_order_relaxed); }
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double speed() const { return speed_.load(std::memory_order_relaxed); }
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void set_auto_gain(bool enabled) { auto_gain_enabled_.store(enabled, std::memory_order_relaxed); }
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bool auto_gain() const { return auto_gain_enabled_.load(std::memory_order_relaxed); }
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private:
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static constexpr std::size_t block_size = 512;
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SimulationRingBuffer& ring_;
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std::array<float, block_size> temp_left_{}, temp_right_{};
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std::array<std::int16_t, block_size * 2> output_{};
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std::atomic<std::uint64_t> underrun_blocks_{};
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std::atomic<double> speed_{1.0};
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std::atomic<bool> auto_gain_enabled_{false};
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float rms_power_{}, peak_envelope_{}, automatic_gain_{1.f};
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float level_alpha_{}, peak_decay_{}, gain_rise_alpha_{}, gain_fall_alpha_{};
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float previous_input_left_{}, previous_output_left_{};
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float previous_input_right_{}, previous_output_right_{};
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static constexpr std::size_t transition_samples = 64;
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std::size_t transition_remaining_{};
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float last_left_{}, last_right_{}, transition_left_{}, transition_right_{};
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bool starving_{true};
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bool onGetData(Chunk& data) override;
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void onSeek(sf::Time time_offset) override;
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};
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} // namespace fluidsim::port
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