void AudioDeviceManager::playTestSound()
{
{ // cunningly nested to swap, unlock and delete in that order.
std::unique_ptr<AudioBuffer<float>> oldSound;
{
const ScopedLock sl (audioCallbackLock);
std::swap (oldSound, testSound);
}
}
testSoundPosition = 0;
if (currentAudioDevice != nullptr)
{
auto sampleRate = currentAudioDevice->getCurrentSampleRate();
auto soundLength = (int) sampleRate;
double frequency = 440.0;
float amplitude = 0.5f;
auto phasePerSample = MathConstants<double>::twoPi / (sampleRate / frequency);
std::unique_ptr<AudioBuffer<float>> newSound (new AudioBuffer<float> (1, soundLength));
for (int i = 0; i < soundLength; ++i)
newSound->setSample (0, i, amplitude * (float) std::sin (i * phasePerSample));
newSound->applyGainRamp (0, 0, soundLength / 10, 0.0f, 1.0f);
newSound->applyGainRamp (0, soundLength - soundLength / 4, soundLength / 4, 1.0f, 0.0f);
{
const ScopedLock sl (audioCallbackLock);
std::swap (testSound, newSound);
}
}
}
Sound *SoundSystem::newSound( const char *path ){
return newSound( path, 1.0, false );
}
