/// <summary>
/// Registers the event client for callbacks
/// </summary>
private void RegisterEventClient()
{
UnregisterEventClient();
_sessionEvents = new AudioSessionEvents();
Marshal.ThrowExceptionForHR(_audioSessionControl.RegisterAudioSessionNotification(_sessionEvents));
}
/// <summary>
/// Registers an even client for callbacks
/// </summary>
/// <param name="eventClient"></param>
public void RegisterEventClient(IAudioSessionEventsHandler eventClient)
{
// we could have an array or list of listeners if we like
audioSessionEventCallback = new AudioSessionEventsCallback(eventClient);
Marshal.ThrowExceptionForHR(
audioSessionControlInterface.RegisterAudioSessionNotification(audioSessionEventCallback));
}
internal AudioSessionControl(IAudioSessionControl realAudioSessionControl)
{
IAudioMeterInformation _meters = realAudioSessionControl as IAudioMeterInformation;
ISimpleAudioVolume _volume = realAudioSessionControl as ISimpleAudioVolume;
if (_meters != null)
_AudioMeterInformation = new CoreAudio.AudioMeterInformation(_meters);
if (_volume != null)
_SimpleAudioVolume = new SimpleAudioVolume(_volume);
_AudioSessionControl = realAudioSessionControl;
_AudioSessionEvents = new AudioSessionEvents(this);
Marshal.ThrowExceptionForHR(_AudioSessionControl.RegisterAudioSessionNotification(_AudioSessionEvents));
}
internal AudioSessionControl(IAudioSessionControl realAudioSessionControl)
{
IAudioMeterInformation _meters = realAudioSessionControl as IAudioMeterInformation;
ISimpleAudioVolume _volume = realAudioSessionControl as ISimpleAudioVolume;
if (_meters != null)
{
_AudioMeterInformation = new CoreAudio.AudioMeterInformation(_meters);
}
if (_volume != null)
{
_SimpleAudioVolume = new SimpleAudioVolume(_volume);
}
_AudioSessionControl = realAudioSessionControl;
//_AudioSessionEvents = new AudioSessionEvents(this);
Marshal.ThrowExceptionForHR(_AudioSessionControl.RegisterAudioSessionNotification(_AudioSessionEvents));
}
/// <summary>
/// refers
/// https://docs.microsoft.com/en-us/windows/win32/coreaudio/volume-controls <= windows mixer theory
/// https://docs.microsoft.com/en-us/windows/win32/medfound/managing-the-audio-session
/// </summary>
public void InitializeAudioSessionDict()
{
_audioSessionEventDict.Clear();
AudioSessionsPid.Clear();
//Get all session process IDs
//refer https://gist.github.com/sverrirs/d099b34b7f72bb4fb386
// enumerate sessions for on this device
_audioSessionManager2.GetSessionEnumerator(out IAudioSessionEnumerator sessionEnumerator);
sessionEnumerator.GetCount(out int count);
// search for an audio session with the required process-id
JoshAudioSessionStruct audioStruc;
AudioSessionEvents ssEvent = null;
string iconSaveDir = $@"C:\Users\JoshOMEN\Documents\";
string[] fileEntries = System.IO.Directory.GetFiles(iconSaveDir);
foreach (var iconStr in fileEntries)
{
if (iconStr.Contains("ico"))
{
System.IO.File.Delete(iconStr);
}
}
for (int i = 0; i < count; ++i)
{
try
{
IAudioSessionControl ctl = null;
IAudioSessionControl2 ctl2 = null;
var revv = sessionEnumerator.GetSession(i, out ctl);
ssEvent = new AudioSessionEvents();
audioStruc = new JoshAudioSessionStruct();
revv = ctl.RegisterAudioSessionNotification(ssEvent);
ctl2 = ctl as IAudioSessionControl2;
// NOTE: we could also use the app name from ctl.GetDisplayName()
revv = ctl2.GetProcessId(out uint cpid);
ssEvent.ProcessID = cpid;
var pos = System.Diagnostics.Process.GetProcessById((int)cpid);
ssEvent.DisplayName = pos.ProcessName;
string fullPath = pos.MainModule.FileName;
var icon = System.Drawing.Icon.ExtractAssociatedIcon(fullPath);
string iconSavedPath = $"{iconSaveDir}{ssEvent.DisplayName}.ico";
// Save it to disk, or do whatever you want with it.
using (var stream = new System.IO.FileStream(iconSavedPath, System.IO.FileMode.CreateNew))
{
icon.Save(stream);
}
ssEvent.RegisterSessionVolumeCallBack(OnSessionChangeCallBack);
ssEvent.RegisterSessionStateCallBack(OnSessionStateChange);
AudioSessionsPid.Add(new AudioSessionDataStruct()
{
SeesionPid = cpid, SessionIconPath = iconSavedPath
});
audioStruc.AudioSessionEventClass = ssEvent;
audioStruc.SimpleAudioControl = ctl2 as ISimpleAudioVolume;
//revv = ctl2.GetDisplayName(out string names);
//Keep session in memory for opreation it later
_audioSessionEventDict.Add(ctl, audioStruc);
}
catch (Exception ex)
{
}
}
}
