37 lines
1.3 KiB
C++
37 lines
1.3 KiB
C++
#pragma once
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#include "./driver/AudioDriver.h"
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namespace tc::audio {
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/**
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* Note: Within the observer callback no methods of the level meter should be called nor the level meter should be destructed.
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*/
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class AudioLevelMeter : public AudioDeviceRecord::Consumer {
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public:
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struct Observer {
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public:
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virtual void input_level_changed(float /* new level */) = 0;
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};
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explicit AudioLevelMeter(std::shared_ptr<AudioDevice> /* target device */);
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virtual ~AudioLevelMeter();
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[[nodiscard]] bool start(std::string& /* error */);
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void stop();
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[[nodiscard]] bool running() const;
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[[nodiscard]] inline float current_volume() const { return this->current_audio_volume; }
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void register_observer(Observer* /* observer */);
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bool unregister_observer(Observer* /* observer */);
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private:
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std::shared_ptr<AudioDevice> target_device{};
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mutable std::mutex recorder_mutex{};
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std::shared_ptr<AudioDeviceRecord> recorder_instance{};
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std::vector<Observer*> registered_observer{};
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float current_audio_volume{0.f};
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void consume(const void *, size_t, size_t) override;
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};
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} |