#include <emscripten/webaudio.h>

// This code shows a simple example of how to create a Web Audio context from C/C++ code using the webaudio.h API,

// and how to add a pure sine wave tone generator to it.

int main()

{

EMSCRIPTEN_WEBAUDIO_T context = emscripten_create_audio_context(0 /* use default constructor options */);

// Illustrate how this handle can be passed to JS code (e.g. to a JS library function, EM_ASM or a EM_JS block)

EM_ASM({

var audioContext = emscriptenGetAudioObject($0);

var oscillator = audioContext.createOscillator();

oscillator.connect(audioContext.destination);

oscillator.start();

// Add a button on the page to toggle playback as a response to user click.

var startButton = document.createElement('button');

startButton.innerHTML = 'Toggle playback';

document.body.appendChild(startButton);

startButton.onclick = () => {

if (audioContext.state != 'running') {

audioContext.resume();

#ifdef REPORT_RESULT

__ReportResult(0, 0);

#endif

} else {

audioContext.suspend();

}

};

}, context);

}