enum Dither {
	None = 0,
	Rectangle,
	Triangle
};

inline quint32 prng_madplay_32bit() {
	static quint32 state;
	
	state = (state * 0x0019660dL + 0x3c6ef35fL) & 0xffffffffL;
	
	return state;
}

template <typename T, Dither mode>
inline qint32 dither(qint32 sample);

template <>
inline qint32 dither<qint16, Rectangle>(qint32 sample) {
	return sample - (prng_madplay_32bit() & 0xffff);
}

template <>
inline qint32 dither<qint16, Triangle>(qint32 sample) {
	static qint32 last;
	qint32 current = prng_madplay_32bit() & 0xffff;
	qint32 dither = current - last;
	
	last = current;
	
	qint64 tmp = sample + dither;
	
	return (qint32)qBound(-2147483648LL, tmp, 2147483647LL);
}