/// <summary>
/// Changes the wave output volume for a sound device.
/// </summary>
/// <param name="percent">Percentage number between -100 and 100 inclusive.
/// If the number begins with a plus or minus sign, the current volume level will be adjusted up or down by the indicated amount.</param>
/// <param name="device">If this parameter is omitted, it defaults to 1 (the first sound device),
/// which is usually the system's default device for recording and playback.</param>
public static void SoundSetWaveVolume(string percent, int device)
{
if (Environment.OSVersion.Platform != PlatformID.Win32NT)
{
return;
}
if (string.IsNullOrEmpty(percent))
{
percent = "0";
}
var dev = new IntPtr(device);
uint vol;
char p = percent[0];
if (p == '+' || p == '-')
{
WindowsAPI.waveOutGetVolume(dev, out vol);
vol = (uint)(vol * double.Parse(percent.Substring(1)) / 100);
}
else
{
vol = (uint)(0xfffff * (double.Parse(percent) / 100));
}
WindowsAPI.waveOutSetVolume(dev, vol);
// TODO: cross platform SoundSetWaveVolume
}
/// <summary>
/// Retrieves the wave output volume for a sound device.
/// </summary>
/// <param name="output">The variable to store the result.</param>
/// <param name="device">If this parameter is omitted, it defaults to 1 (the first sound device),
/// which is usually the system's default device for recording and playback.
/// Specify a higher value to operate upon a different sound device.</param>
public static void SoundGetWaveVolume(out int output, int device)
{
output = 0;
if (Environment.OSVersion.Platform != PlatformID.Win32NT)
{
return;
}
uint vol = 0;
WindowsAPI.waveOutGetVolume(new IntPtr(device), out vol);
output = (int)vol;
// UNDONE: cross platform SoundGetWaveVolume
}
