74 lines
1.4 KiB
C++
74 lines
1.4 KiB
C++
#ifndef muz_AUDIOENGINE_HPP
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#define muz_AUDIOENGINE_HPP
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#include <portaudio.h>
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#include "commons.hpp"
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#include "AudioConf.hpp"
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namespace muz
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{
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class Signal;
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MUZ_ERROR(audio_error);
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/**
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* Make sound from signals.
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* @see Signal
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**/
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class AudioEngine
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{
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public:
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explicit AudioEngine(AudioConf const& conf);
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virtual ~AudioEngine();
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/**
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* Initialize the engine opening audio device.
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**/
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void init();
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/**
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* Run the engine, making sound.
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**/
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void run();
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/**
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* Push a new signal in the signals queue.
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*/
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void push_signal(std::unique_ptr<Signal> signal);
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/**
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* Pop the current signal or does nothing if the queue is empty.
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**/
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void pop_signal();
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private:
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AudioConf m_conf;
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PaStream* m_stream = nullptr;
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std::vector<std::unique_ptr<Signal>> m_sig_queue;
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std::mutex m_sig_mtx;
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/**
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* Throws an audio_error exception if err is an error.
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**/
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void check_error(PaError err);
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/**
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* Gives the next sample of the current signal.
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* @see Signal
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**/
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std::vector<float> next();
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/**
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* Portaudio audio callback.
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**/
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static int callback(void const* input, void* output,
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unsigned long frames_per_buffer,
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PaStreamCallbackTimeInfo const* time,
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PaStreamCallbackFlags flags,
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void* data);
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};
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}
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#endif
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