// Check if there is any other sound playing except the defaulsession
public bool IsAwkward(AudioSession defaultSession, float tolerance)
{
tolerance *= tolerance;
if (tolerance < 1) tolerance = 1;
using (var sessionManager = GetDefaultAudioSessionManager2(DataFlow.Render))
{
using (var sessionEnumerator = sessionManager.GetSessionEnumerator())
{
foreach (var session in sessionEnumerator)
{
if(session.GroupingParam != defaultSession.groupingParam)
{
using (var audioMeterInformation = session.QueryInterface<AudioMeterInformation>())
{
if (audioMeterInformation.PeakValue > tolerance / 1000)
{
return false;
}
}
}
}
}
}
return true;
}
// Start monitoring the selected sound session
private void startBtn_Click(object sender, EventArgs e)
{
if (sourceListBox.CheckedItems.Count > 0)
{
string sessionName = sourceListBox.CheckedItems[0].ToString();
foreach (var session in sessionList_)
{
if (session.name.Equals(sessionName))
{
defaultSession_ = session;
timer1.Start();
logTextBox.Text = "Start";
splitContainer.Panel1.Enabled = false;
splitContainer.Panel1.BackColor = colorDisabled_;
groupBox1.Enabled = false;
groupBox1.BackColor = colorDisabled_;
startBtn.Enabled = false;
stopBtn.Enabled = true;
break;
}
}
}
}
// Check if a given session currently is play audio
public bool SessionPlaying(AudioSession defaultSession)
{
using (var sessionManager = GetDefaultAudioSessionManager2(DataFlow.Render))
{
using (var sessionEnumerator = sessionManager.GetSessionEnumerator())
{
foreach (var session in sessionEnumerator)
{
if (session.GroupingParam == defaultSession.groupingParam)
{
using (var audioMeterInformation = session.QueryInterface<AudioMeterInformation>())
{
// Sometimes very very small but not 0 even when not playing
if(audioMeterInformation.PeakValue > 0.0001)
{
return true;
}
}
}
}
}
}
return false;
}
// Pause or Unpause audiosession
public void TogglePause(AudioSession defaultSession)
{
using (var sessionManager = GetDefaultAudioSessionManager2(DataFlow.Render))
{
using (var sessionEnumerator = sessionManager.GetSessionEnumerator())
{
foreach (var session in sessionEnumerator)
{
using (var audioMeterInformation = session.QueryInterface<AudioMeterInformation>())
using (var session2 = session.QueryInterface<AudioSessionControl2>())
{
if (session.GroupingParam == defaultSession.groupingParam && session2.Process != null)
{
SendMessageW(session2.Process.MainWindowHandle, WM_APPCOMMAND, session2.Process.MainWindowHandle, (IntPtr)APPCOMMAND_MEDIA_PLAY_PAUSE);
}
}
}
}
}
}
// Mute or unmute the audioSession
public void Mute(AudioSession defaultSession, bool mute)
{
using (var sessionManager = GetDefaultAudioSessionManager2(DataFlow.Render))
{
using (var sessionEnumerator = sessionManager.GetSessionEnumerator())
{
foreach (var session in sessionEnumerator)
{
if (session.GroupingParam == defaultSession.groupingParam)
{
using (var simpleVolume = session.QueryInterface<SimpleAudioVolume>())
{
simpleVolume.IsMuted = mute;
}
}
}
}
}
}
