09d7d2b68e
* examples : refactor common code into a library * examples : refactor common SDL code into a library * make : update Makefile to use common libs * common : fix MSVC M_PI .. * addon.node : link common lib
51 lines
1,011 B
C++
51 lines
1,011 B
C++
#pragma once
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#include <SDL.h>
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#include <SDL_audio.h>
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#include <atomic>
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#include <cstdint>
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#include <vector>
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#include <mutex>
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//
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// SDL Audio capture
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//
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class audio_async {
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public:
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audio_async(int len_ms);
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~audio_async();
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bool init(int capture_id, int sample_rate);
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// start capturing audio via the provided SDL callback
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// keep last len_ms seconds of audio in a circular buffer
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bool resume();
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bool pause();
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bool clear();
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// callback to be called by SDL
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void callback(uint8_t * stream, int len);
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// get audio data from the circular buffer
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void get(int ms, std::vector<float> & audio);
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private:
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SDL_AudioDeviceID m_dev_id_in = 0;
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int m_len_ms = 0;
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int m_sample_rate = 0;
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std::atomic_bool m_running;
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std::mutex m_mutex;
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std::vector<float> m_audio;
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std::vector<float> m_audio_new;
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size_t m_audio_pos = 0;
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size_t m_audio_len = 0;
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};
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// Return false if need to quit
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bool sdl_poll_events();
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