/// <summary>
/// Increments or decrements the current volume level by the <see cref="stepAmount"/>.
/// </summary>
/// <param name="stepAmount">Value between -100 and 100 indicating the desired step amount. Use negative numbers to decrease
/// the volume and positive numbers to increase it.</param>
/// <returns>the new volume level assigned</returns>
public static float StepMasterVolume(float stepAmount)
{
Interfaces.IAudioEndpointVolume masterVol = null;
try
{
masterVol = GetMasterVolumeObject();
if (masterVol == null)
{
return(-1);
}
float stepAmountScaled = stepAmount / 100;
// Get the level
float volumeLevel;
masterVol.GetMasterVolumeLevelScalar(out volumeLevel);
// Calculate the new level
float newLevel = volumeLevel + stepAmountScaled;
newLevel = Math.Min(1, newLevel);
newLevel = Math.Max(0, newLevel);
masterVol.SetMasterVolumeLevelScalar(newLevel, Guid.Empty);
// Return the new volume level that was set
return(newLevel * 100);
}
finally
{
if (masterVol != null)
{
Marshal.ReleaseComObject(masterVol);
}
}
}
/// <summary>
/// Sets the master volume to a specific level
/// </summary>
/// <param name="newLevel">Value between 0 and 100 indicating the desired scalar value of the volume</param>
public static void SetMasterVolume(float newLevel)
{
Interfaces.IAudioEndpointVolume masterVol = null;
try
{
masterVol = GetMasterVolumeObject();
if (masterVol == null)
{
return;
}
masterVol.SetMasterVolumeLevelScalar(newLevel / 100, Guid.Empty);
}
finally
{
if (masterVol != null)
{
Marshal.ReleaseComObject(masterVol);
}
}
}
