sfml 0.20.0

Rust binding for sfml
Documentation 
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#include <SFML/Audio/SoundRecorder.hpp>
#include <cstddef>
#include <cstdint>
#include <vector>

typedef bool (*sfSoundRecorderStartCallback)(void *);                            ///< Type of the callback used when starting a capture
typedef bool (*sfSoundRecorderProcessCallback)(const int16_t *, size_t, void *); ///< Type of the callback used to process audio data
typedef void (*sfSoundRecorderStopCallback)(void *);                             ///< Type of the callback used when stopping a capture

// Helper class implementing the callback forwarding from
// C++ to C in sfSoundRecorder
class sfSoundRecorder : public sf::SoundRecorder {
  public:
    sfSoundRecorder(sfSoundRecorderStartCallback onStart,
                    sfSoundRecorderProcessCallback onProcess,
                    sfSoundRecorderStopCallback onStop,
                    void *userData) : myStartCallback(onStart),
                                      myProcessCallback(onProcess),
                                      myStopCallback(onStop),
                                      myUserData(userData) {
    }

    void setProcessingInterval(int64_t interval) {
        sf::SoundRecorder::setProcessingInterval(sf::microseconds(interval));
    }

  private:
    virtual bool onStart() {
        if (myStartCallback)
            return myStartCallback(myUserData);
        else
            return true;
    }

    virtual bool onProcessSamples(const sf::Int16 *samples, std::size_t sampleCount) {
        if (myProcessCallback)
            return myProcessCallback(samples, sampleCount, myUserData);
        else
            return true;
    }

    virtual void onStop() {
        if (myStopCallback)
            myStopCallback(myUserData);
    }

    sfSoundRecorderStartCallback myStartCallback;
    sfSoundRecorderProcessCallback myProcessCallback;
    sfSoundRecorderStopCallback myStopCallback;
    void *myUserData;
};

extern "C" sfSoundRecorder *sfSoundRecorder_create(sfSoundRecorderStartCallback onStart,
                                                   sfSoundRecorderProcessCallback onProcess,
                                                   sfSoundRecorderStopCallback onStop,
                                                   void *userData) {
    return new sfSoundRecorder(onStart, onProcess, onStop, userData);
}

extern "C" void sfSoundRecorder_destroy(sfSoundRecorder *soundRecorder) {
    delete soundRecorder;
}

extern "C" bool sfSoundRecorder_start(sfSoundRecorder *soundRecorder, unsigned int sampleRate) {
    return soundRecorder->start(sampleRate);
}

extern "C" void sfSoundRecorder_stop(sfSoundRecorder *soundRecorder) {
    soundRecorder->stop();
}

extern "C" unsigned int sfSoundRecorder_getSampleRate(const sfSoundRecorder *soundRecorder) {
    return soundRecorder->getSampleRate();
}

extern "C" bool sfSoundRecorder_isAvailable(void) {
    return sf::SoundRecorder::isAvailable();
}

extern "C" void sfSoundRecorder_setProcessingInterval(sfSoundRecorder *soundRecorder, int64_t interval) {
    soundRecorder->setProcessingInterval(interval);
}

extern "C" std::vector<std::string> *sfSoundRecorder_getAvailableDevices() {
    return new std::vector<std::string>(sf::SoundRecorder::getAvailableDevices());
}

extern "C" std::string *sfSoundRecorder_getDefaultDevice() {
    return new std::string(sf::SoundRecorder::getDefaultDevice());
}

extern "C" bool sfSoundRecorder_setDevice(sfSoundRecorder *soundRecorder, const char *name) {
    return soundRecorder->setDevice(name);
}

extern "C" const std::string *sfSoundRecorder_getDevice(sfSoundRecorder *soundRecorder) {
    return &soundRecorder->getDevice();
}

extern "C" void sfSoundRecorder_setChannelCount(sfSoundRecorder *soundRecorder, unsigned int channelCount) {
    soundRecorder->setChannelCount(channelCount);
}

extern "C" unsigned int sfSoundRecorder_getChannelCount(const sfSoundRecorder *soundRecorder) {
    return soundRecorder->getChannelCount();
}