| private GetCount ( int* SessionCount ) : HRESULT, | ||
| SessionCount | int* | |
| return | HRESULT, | |
private static T GetCoreAudioObject <T>(int pid)
{
IMMDevice speakers = VolumeMixer.GetOutputDevice();
IAudioSessionManager2 mgr = VolumeMixer.GetOutputDeviceSessionManager(speakers);
IAudioSessionEnumerator sessionEnumerator = VolumeMixer.GetOutputDeviceSessionEnumerator(mgr);
int count;
sessionEnumerator.GetCount(out count);
dynamic volumeControl = null;
for (int i = 0; i < count; i++)
{
IAudioSessionControl2 ctl;
sessionEnumerator.GetSession(i, out ctl);
int cpid;
ctl.GetProcessId(out cpid);
if (cpid == pid)
{
volumeControl = (T)ctl;
break;
}
Marshal.ReleaseComObject(ctl);
}
Marshal.ReleaseComObject(sessionEnumerator);
Marshal.ReleaseComObject(mgr);
Marshal.ReleaseComObject(speakers);
return(volumeControl);
}
/// <summary>
/// Iterates through process IDs that have a volume controller
/// </summary>
public IEnumerable <int> EnumerateProcesses()
{
if (!isSupported)
{
yield break;
}
IAudioSessionEnumerator sessionEnumerator = null;
try
{
mgr.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
for (int i = 0; i < count; i++)
{
IAudioSessionControl2 ctl;
sessionEnumerator.GetSession(i, out ctl);
int cpid;
ctl.GetProcessId(out cpid);
Marshal.ReleaseComObject(ctl);
yield return(cpid);
}
}
finally
{
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator);
}
}
}
private static ISimpleAudioVolume GetVolumeObject(string name)
{
IMMDeviceEnumerator devices = (IMMDeviceEnumerator) new MMDeviceEnumerator();
IMMDevice device = devices.GetDefaultAudioEndpoint(EDATAFLOW_RENDER, EROLE_MULTIMEDIA);
Guid sessionManagerGUID = typeof(IAudioSessionManager2).GUID;
IAudioSessionManager2 manager = (IAudioSessionManager2)device.Activate(ref sessionManagerGUID, 0, IntPtr.Zero);
IAudioSessionEnumerator sessions = manager.GetSessionEnumerator();
ISimpleAudioVolume volumeObj = null;
for (int index = sessions.GetCount() - 1; index >= 0; index--)
{
IAudioSessionControl2 ctl = sessions.GetSession(index) as IAudioSessionControl2;
if (ctl != null)
{
string identifier = ctl.GetSessionIdentifier();
if (identifier != null && identifier.Contains(name))
{
volumeObj = ctl as ISimpleAudioVolume;
break;
}
Marshal.ReleaseComObject(ctl);
}
}
Marshal.ReleaseComObject(devices);
Marshal.ReleaseComObject(device);
Marshal.ReleaseComObject(manager);
Marshal.ReleaseComObject(sessions);
return(volumeObj);
}
// Lists all devices, and for each device all processes that are currently playing sound using that device
public static List <SoundInfoDevice> getSoundInfo()
{
List <SoundInfoDevice> soundInfoDevices = new List <SoundInfoDevice>();
DeviceEnumerator enumerator = new DeviceEnumerator();
IMMDeviceEnumerator deviceEnumerator = (IMMDeviceEnumerator)enumerator;
IMMDeviceCollection deviceCollection = deviceEnumerator.EnumAudioEndpoints(EDataFlow.eRender, DeviceStatemask.DEVICE_STATE_ACTIVE);
uint deviceCount = deviceCollection.GetCount();
for (uint i = 0; i < deviceCount; i++)
{
SoundInfoDevice soundInfoDevice = new SoundInfoDevice();
soundInfoDevices.Add(soundInfoDevice);
IMMDevice device = deviceCollection.Item(i);
string deviceId = device.GetId();
soundInfoDevice.ID = deviceId;
IMMPropertyStore propertyStore = device.OpenPropertyStore(ProperyStoreMode.STGM_READ);
PropertyKey propertyKeyDeviceDesc = new PropertyKey();
propertyKeyDeviceDesc.fmtid = new Guid(0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0);
propertyKeyDeviceDesc.pid = 2;
PropVariant deviceNamePtr = propertyStore.GetValue(ref propertyKeyDeviceDesc);
string deviceName = Marshal.PtrToStringUni(deviceNamePtr.pszVal);
soundInfoDevice.name = deviceName;
Guid guidAudioSessionManager2 = new Guid("77AA99A0-1BD6-484F-8BC7-2C654C9A9B6F");
IAudioSessionManager2 audioSessionManager = (IAudioSessionManager2)device.Activate(ref guidAudioSessionManager2, (int)ClsCtx.CLSCTX_ALL, IntPtr.Zero);
IAudioSessionEnumerator sessionEnumerator = audioSessionManager.GetSessionEnumerator();
int sessionCount = sessionEnumerator.GetCount();
for (int j = 0; j < sessionCount; j++)
{
IAudioSessionControl audioSessionControl = sessionEnumerator.GetSession(j);
IAudioSessionControl2 audioSessionControl2 = (IAudioSessionControl2)audioSessionControl;
AudioSessionState state = audioSessionControl.GetState();
if (state == AudioSessionState.AudioSessionStateActive)
{
SoundInfoSession soundInfoSession = new SoundInfoSession();
soundInfoDevice.sessions.Add(soundInfoSession);
string displayName = audioSessionControl.GetDisplayName();
string iconPath = audioSessionControl.GetIconPath();
int processId = audioSessionControl2.GetProcessId();
string processName = Process.GetProcessById(processId).MainWindowTitle;
soundInfoSession.pid = processId;
soundInfoSession.windowName = processName;
}
}
}
return(soundInfoDevices);
}
private static ISimpleAudioVolume GetVolumeObject(int pid)
{
IMMDeviceEnumerator deviceEnumerator = (IMMDeviceEnumerator)(new MMDeviceEnumerator());
IMMDevice speakers = null;
IAudioSessionEnumerator sessionEnumerator = null;
IAudioSessionManager2 mgr = null;
try
{
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out speakers);
Guid IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
object o;
speakers.Activate(ref IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
mgr = (IAudioSessionManager2)o;
mgr.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
ISimpleAudioVolume volumeControl = null;
for (int i = 0; i < count; i++)
{
IAudioSessionControl2 ctl;
sessionEnumerator.GetSession(i, out ctl);
int cpid;
ctl.GetProcessId(out cpid);
if (cpid == pid)
{
volumeControl = ctl as ISimpleAudioVolume;
break;
}
Marshal.ReleaseComObject(ctl);
}
return(volumeControl);
}
finally
{
Marshal.ReleaseComObject(sessionEnumerator);
Marshal.ReleaseComObject(mgr);
Marshal.ReleaseComObject(speakers);
Marshal.ReleaseComObject(deviceEnumerator);
}
}
public AudioSessionControl FindSession(IAudioSessionManager2 session_manager, AudioSessionProc matchsession_proc, object data)
{
AudioSessionControl res = null;
IAudioSessionEnumerator sessionList = null;
session_manager.GetSessionEnumerator(out sessionList);
if (sessionList == null)
{
return(null);
}
int cnt = 0;
sessionList.GetCount(out cnt);
for (int index = 0; index < cnt; index++)
{
IAudioSessionControl session = null;
sessionList.GetSession(index, out session);
if (session == null)
{
continue;
}
bool quit = false;
AudioSessionControl control = null;
try
{
control = new AudioSessionControl(session);
quit = (matchsession_proc(control, data) == false);
if (quit)
{
res = control;
break;
}
control.Dispose();
Marshal.Release(Marshal.GetIUnknownForObject(session));
}
catch { }
{
}
}
Marshal.Release(Marshal.GetIUnknownForObject(sessionList));
GC.WaitForPendingFinalizers();
return(res);
}
// Get audio controls and process Ids for audio sessions from enumerator
public static IDictionary <int, IAudioSessionControl2> GetAudioContols(IAudioSessionEnumerator sessions)
{
int count;
sessions.GetCount(out count);
IDictionary <int, IAudioSessionControl2> controls = new Dictionary <int, IAudioSessionControl2>();
for (int i = 0; i < count; i++)
{
IAudioSessionControl2 ctl;
sessions.GetSession(i, out ctl);
int cpid;
ctl.GetProcessId(out cpid);
controls[cpid] = ctl;
}
return(controls);
}
/// <summary>
/// Queries the volume controller for the process
/// </summary>
/// <returns>True if found</returns>
public bool Query()
{
if (!isSupported)
{
return(false);
}
IAudioSessionEnumerator sessionEnumerator = null;
try
{
mgr.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
for (int i = 0; i < count; i++)
{
IAudioSessionControl2 ctl;
sessionEnumerator.GetSession(i, out ctl);
int cpid;
ctl.GetProcessId(out cpid);
if (cpid == processId)
{
volume = ctl as ISimpleAudioVolume;
return(true);
}
Marshal.ReleaseComObject(ctl);
}
}
finally
{
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator);
}
}
return(false);
}
/// <summary>
/// Finds the matching process and volume control
/// </summary>
/// <param name="processName">The name of the process to find</param>
/// <param name="selectedProcess">The selected process</param>
/// <param name="volumeControl">The volume control object</param>
private static void FindMatchingProcess(string processName, out Process selectedProcess, out ISimpleAudioVolume volumeControl)
{
selectedProcess = null;
volumeControl = null;
// First find the list of matching processes
Process[] matchingProcesses = Process.GetProcessesByName(processName);
if (matchingProcesses != null && matchingProcesses.Length > 0)
{
// Attempt to see if we can find an audio session with the same Process ID as one we have found
IMMDeviceEnumerator deviceEnumerator = null;
IMMDevice device = null;
IAudioSessionManager2 sessionManager = null;
IAudioSessionEnumerator sessionEnumerator = null;
object activatedObject = null;
Guid sessionManagerGuid = typeof(IAudioSessionManager2).GUID;
try
{
// Create the Device Enumerator
deviceEnumerator = (IMMDeviceEnumerator)(new MMDeviceEnumerator());
// Get the default audio device
if (deviceEnumerator != null)
{
deviceEnumerator.GetDefaultAudioEndpoint(DataFlow.Render, Role.Multimedia, out device);
}
// Get the Session Manager
if (device != null)
{
device.Activate(ref sessionManagerGuid, (uint)0, IntPtr.Zero, out activatedObject);
sessionManager = activatedObject as IAudioSessionManager2;
activatedObject = null;
}
// Get the Session Enumerator
if (sessionManager != null)
{
sessionManager.GetSessionEnumerator(out sessionEnumerator);
}
// Look through the list of Sessions and find one with a matching process ID.
if (sessionEnumerator != null)
{
int totalSessions = 0;
sessionEnumerator.GetCount(out totalSessions);
for (int currentSession = 0; currentSession < totalSessions; currentSession++)
{
IAudioSessionControl currentSessionControl = null;
sessionEnumerator.GetSession(currentSession, out currentSessionControl);
IAudioSessionControl2 currentSessionControl2 = currentSessionControl as IAudioSessionControl2;
if (currentSessionControl2 != null)
{
uint processID = 0;
currentSessionControl2.GetProcessID(out processID);
foreach (Process currentProcess in matchingProcesses)
{
// We found the correct process and audio session
if (currentProcess.Id == processID)
{
selectedProcess = currentProcess;
volumeControl = currentSessionControl as ISimpleAudioVolume;
break;
}
}
}
if (selectedProcess != null)
{
// We found the volume control
break;
}
else
{
// Free the current session
Marshal.ReleaseComObject(currentSessionControl);
}
}
}
}
finally
{
// Clean up the COM Objects that we used
if (activatedObject != null)
{
Marshal.ReleaseComObject(activatedObject);
}
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator);
}
if (sessionManager != null)
{
Marshal.ReleaseComObject(sessionManager);
}
if (device != null)
{
Marshal.ReleaseComObject(device);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
}
// If we get here for some reason and don't have a matching process then we will just take the first one with a valid Window Handle
if (selectedProcess == null)
{
foreach (Process currentProcess in matchingProcesses)
{
if (currentProcess != null && currentProcess.MainWindowHandle != IntPtr.Zero)
{
selectedProcess = currentProcess;
break;
}
}
}
}
}
private static ISimpleAudioVolume GetVolumeObject(int pid)
{
IMMDeviceEnumerator deviceEnumerator = null;
IAudioSessionEnumerator sessionEnumerator = null;
IAudioSessionManager2 mgr = null;
IMMDevice speakers = null;
try
{
// get the speakers (1st render + multimedia) device
deviceEnumerator = (IMMDeviceEnumerator)(new MMDeviceEnumerator());
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out speakers);
// activate the session manager. we need the enumerator
Guid IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
object o;
speakers.Activate(ref IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
mgr = (IAudioSessionManager2)o;
// enumerate sessions for on this device
mgr.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
// search for an audio session with the required process-id
ISimpleAudioVolume volumeControl = null;
for (int i = 0; i < count; ++i)
{
IAudioSessionControl2 ctl = null;
try
{
sessionEnumerator.GetSession(i, out ctl);
// NOTE: we could also use the app name from ctl.GetDisplayName()
int cpid;
ctl.GetProcessId(out cpid);
if (cpid == pid)
{
volumeControl = ctl as ISimpleAudioVolume;
break;
}
}
finally
{
//if (ctl != null) Marshal.ReleaseComObject(ctl);
}
}
return(volumeControl);
}
finally
{
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator);
}
if (mgr != null)
{
Marshal.ReleaseComObject(mgr);
}
if (speakers != null)
{
Marshal.ReleaseComObject(speakers);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
}
}
public static List <int> getAllAudioSessions()
{
List <int> pipNumbersList = new List <int>();
IMMDeviceEnumerator deviceEnumerator = null;
IAudioSessionEnumerator sessionEnumerator = null;
IAudioSessionManager2 mgr = null;
IMMDevice speakers = null;
try
{
// get the speakers (1st render + multimedia) device
deviceEnumerator = (IMMDeviceEnumerator)(new MMDeviceEnumerator());
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out speakers);
// activate the session manager. we need the enumerator
Guid IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
object o;
speakers.Activate(ref IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
mgr = (IAudioSessionManager2)o;
// enumerate sessions for on this device
mgr.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
for (int i = 0; i < count; ++i)
{
IAudioSessionControl2 ctl = null;
try
{
sessionEnumerator.GetSession(i, out ctl);
// NOTE: we could also use the app name from ctl.GetDisplayName()
int cpid;
ctl.GetProcessId(out cpid);
pipNumbersList.Add(cpid);
//Console.WriteLine(cpid.ToString());
}
finally
{
// if (ctl != null) Marshal.ReleaseComObject(ctl);
}
}
return(pipNumbersList);
}
finally
{
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator);
}
if (mgr != null)
{
Marshal.ReleaseComObject(mgr);
}
if (speakers != null)
{
Marshal.ReleaseComObject(speakers);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
}
}
//считывает текущее значение уровней звука и обновляет UI
public void UpdateVisualizer()
{
if (speakers == null)
{
return;
}
IAudioSessionManager2 mgr = null;
IAudioSessionEnumerator sessionEnumerator = null;
IAudioSessionControl ctl = null;
IAudioSessionControl2 ctl2 = null;
IAudioMeterInformation meter = null;
try
{
// activate the session manager. we need the enumerator
Guid IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
object o;
speakers.Activate(ref IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
mgr = (IAudioSessionManager2)o;
// enumerate sessions for on this device
mgr.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
float max_val = 0.0f; //максимальное значение уровня звука для всех сессий
int h_min = 50, h_max = 120; //макс. и мин. значение высоты для эллипса
int hr;
uint pid = 0;
float val = 0.0f;
for (int i = 0; i < count; i++)
{
if (ctl != null)
{
Marshal.ReleaseComObject(ctl); ctl = null;
}
if (ctl2 != null)
{
Marshal.ReleaseComObject(ctl2); ctl2 = null;
}
if (meter != null)
{
Marshal.ReleaseComObject(meter); meter = null;
}
//получаем WASAPI-сессию
hr = sessionEnumerator.GetSession(i, out ctl);
if (hr != 0)
{
continue;
}
ctl2 = (IAudioSessionControl2)ctl;
pid = 0;
ctl2.GetProcessId(out pid);
if (pid != this_pid)
{
continue; //интересуют только сессии текущего процесса
}
meter = (IAudioMeterInformation)ctl;
hr = meter.GetPeakValue(out val); //получаем уровень звука
if (hr != 0)
{
continue;
}
if (val > max_val)
{
max_val = val;
}
}
//изменяем высоту эллипса в соответствии со значением максимального уровня звука
ellVisualizer.Height = h_min + max_val * (h_max - h_min);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), ex.GetType().ToString());
}
finally
{
//очистка ресурсов
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator); sessionEnumerator = null;
}
if (mgr != null)
{
Marshal.ReleaseComObject(mgr); mgr = null;
}
if (ctl != null)
{
Marshal.ReleaseComObject(ctl); ctl = null;
}
if (ctl2 != null)
{
Marshal.ReleaseComObject(ctl2); ctl2 = null;
}
if (meter != null)
{
Marshal.ReleaseComObject(meter); meter = null;
}
}
}
private static ISimpleAudioVolume GetVolumeObject()
{
IMMDeviceEnumerator deviceEnumerator = null;
IAudioSessionEnumerator sessionEnumerator = null;
IAudioSessionManager2 sessionManager = null;
IMMDevice device = null;
try
{
// ReSharper disable once SuspiciousTypeConversion.Global
deviceEnumerator = (IMMDeviceEnumerator) new MMDeviceEnumerator();
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out device);
// ReSharper disable once InconsistentNaming
var IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
object obj;
device.Activate(IID_IAudioSessionManager2, 0, IntPtr.Zero, out obj);
sessionManager = (IAudioSessionManager2)obj;
sessionManager.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
ISimpleAudioVolume volumeControl = null;
for (var i = 0; i < count; i++)
{
IAudioSessionControl sessionControl = null;
IAudioSessionControl2 sessionControl2 = null;
try
{
sessionEnumerator.GetSession(i, out sessionControl);
sessionControl2 = sessionControl as IAudioSessionControl2;
if (sessionControl2 == null)
{
// 多分通らない
string displayName;
sessionControl.GetDisplayName(out displayName);
if (displayName == "Norma")
{
volumeControl = sessionControl as ISimpleAudioVolume;
break;
}
}
else
{
uint processId;
sessionControl2.GetProcessId(out processId);
if (processId == Process.GetCurrentProcess().Id)
{
volumeControl = sessionControl2 as ISimpleAudioVolume;
break;
}
}
}
finally
{
// うーん
/*
* if (sessionControl != null)
* Marshal.ReleaseComObject(sessionControl);
* if (sessionControl2 != null)
* Marshal.ReleaseComObject(sessionControl2);
*/
}
}
return(volumeControl);
}
finally
{
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator);
}
if (sessionManager != null)
{
Marshal.ReleaseComObject(sessionManager);
}
if (device != null)
{
Marshal.ReleaseComObject(device);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
}
}
public static List <Process> GetAudioProcesses()
{
IMMDeviceEnumerator deviceEnumerator = null;
IAudioSessionEnumerator sessionEnumerator = null;
IAudioSessionManager2 mgr = null;
IMMDevice speakers = null;
List <Process> audioProcesses = new List <Process>();
try
{
// get the speakers (1st render + multimedia) device
deviceEnumerator = (IMMDeviceEnumerator)(new MMDeviceEnumerator());
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out speakers);
// activate the session manager. we need the enumerator
Guid IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
object o;
speakers.Activate(ref IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
mgr = (IAudioSessionManager2)o;
// enumerate sessions for on this device
mgr.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
// search for an audio session with the required process-id
for (int i = 0; i < count; ++i)
{
IAudioSessionControl2 ctl = null;
try
{
sessionEnumerator.GetSession(i, out ctl);
ctl.GetProcessId(out int cpid);
audioProcesses.Add(Process.GetProcessById(cpid));
}
finally
{
if (ctl != null)
{
Marshal.ReleaseComObject(ctl);
}
}
}
return(audioProcesses);
}
finally
{
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator);
}
if (mgr != null)
{
Marshal.ReleaseComObject(mgr);
}
if (speakers != null)
{
Marshal.ReleaseComObject(speakers);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
}
}
/// <summary>
/// 判断是否存在进程
/// </summary>
/// <param name="processName"></param>
/// <returns></returns>
public static bool IsExistProcessName(string processName)
{
try
{
//标识
bool flag = false;
// get the speakers (1st render + multimedia) device
IMMDeviceEnumerator deviceEnumerator = (IMMDeviceEnumerator)(new MMDeviceEnumerator());
IMMDevice speakers = null;
if (deviceEnumerator != null)
{
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out speakers);
}
// activate the session manager. we need the enumerator
Guid IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
object o = null;
if (speakers != null)
{
speakers.Activate(ref IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
}
IAudioSessionManager2 mgr = (IAudioSessionManager2)o;
// enumerate sessions for on this device
IAudioSessionEnumerator sessionEnumerator = null;
if (mgr != null)
{
mgr.GetSessionEnumerator(out sessionEnumerator);
}
int count = 0;
if (sessionEnumerator != null)
{
sessionEnumerator.GetCount(out count);
}
for (int i = 0; i < count; i++)
{
IAudioSessionControl ctl;
IAudioSessionControl2 ctl2;
sessionEnumerator.GetSession(i, out ctl);
ctl2 = ctl as IAudioSessionControl2;
uint pid = 0;
string sout1 = "";
string sout2 = "";
int a = 0;
if (ctl2 != null)
{
ctl2.GetSessionIdentifier(out sout1);
ctl2.GetProcessId(out pid);
ctl2.GetSessionInstanceIdentifier(out sout2);
}
if (sout2.ToUpper().Contains(processName.ToUpper()))
{
ISimpleAudioVolume volumeControl = null;
volumeControl = ctl as ISimpleAudioVolume;
Guid guid = Guid.Empty;
AudioSessionState state;
ctl2.GetState(out state);
if (state.ToString() == "AudioSessionStateActive")
{
//volumeControl.GetMasterVolume(out Ad_Volume_level);
flag = true;
}
}
if (ctl != null)
{
Marshal.ReleaseComObject(ctl);
}
if (ctl2 != null)
{
Marshal.ReleaseComObject(ctl2);
}
}
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator);
}
if (mgr != null)
{
Marshal.ReleaseComObject(mgr);
}
if (speakers != null)
{
Marshal.ReleaseComObject(speakers);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
return(flag);
}
catch (Exception ex)
{
WriteLog.WriteErrorLogToFile(string.Format("日志定位Controller.cs-IsExistProcessName(string processName)判断是否存在进程错误-错误信息：{0} {1}", ex.Message.ToString(), DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")), true);
throw ex;
}
}
// enumerate sessions for on this device
private static void GetSessionEnumerator(IAudioSessionManager2 mgr, out IAudioSessionEnumerator sessionEnumerator, out int count)
{
mgr.GetSessionEnumerator(out sessionEnumerator);
sessionEnumerator.GetCount(out count);
}
private static ISimpleAudioVolume GetVolumeObject(int pid)
{
IMMDeviceEnumerator deviceEnumerator = null;
IAudioSessionEnumerator sessionEnumerator = null;
IAudioSessionManager2 mgr = null;
IMMDevice speakers = null;
try
{
// get the speakers (1st render + multimedia) device
deviceEnumerator = (IMMDeviceEnumerator)(new MMDeviceEnumerator());
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out speakers);
// activate the session manager. we need the enumerator
Guid IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
object o;
speakers.Activate(ref IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
mgr = (IAudioSessionManager2)o;
// enumerate sessions for on this device
mgr.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
// search for an audio session with the required process-id
ISimpleAudioVolume volumeControl = null;
for (int i = 0; i < count; ++i)
{
IAudioSessionControl2 ctl = null;
try
{
sessionEnumerator.GetSession(i, out ctl);
// NOTE: we could also use the app name from ctl.GetDisplayName()
int cpid;
ctl.GetProcessId(out cpid);
if (cpid == pid)
{
volumeControl = ctl as ISimpleAudioVolume;
break;
}
}
finally
{
if (ctl != null)
{
Marshal.ReleaseComObject(ctl);
}
}
}
return(volumeControl);
}
finally
{
// bp2008 note: it may be necessary to swap the release of [sessionEnumerator] and [speakers], but that is based on a fork of the class that bloats the code by removing the GetVolumeObject method and copy pasting all that boilerplate into each method, so my faith is extremely limited.
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator);
}
if (mgr != null)
{
Marshal.ReleaseComObject(mgr);
}
if (speakers != null)
{
Marshal.ReleaseComObject(speakers);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
}
}
public static void SetApplicationMute(string procname, bool mute)
{
IAudioSessionManager2 mgr = null;
IAudioSessionEnumerator sessionEnumerator = null;
try
{
ISimpleAudioVolume obj = null;
mgr = GetAudioSessionManager();
if (mgr == null)
{
return;
}
mgr.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
for (int i = 0; i < count; i++)
{
IAudioSessionControl ctl;
sessionEnumerator.GetSession(i, out ctl);
if (ctl == null)
{
continue;
}
IAudioSessionControl2 ctl2 = ctl as IAudioSessionControl2;
if (ctl2 != null)
{
try
{
if (new AudioSession(ctl2).Process.ProcessName.ToLower().Equals(procname))
{
obj = ctl2 as ISimpleAudioVolume;
if (mute)
{
//obj.SetMute(mute, Guid.Empty);
try
{
obj.GetMasterVolume(out volume); // Save old volume
}
catch (Exception e)
{
}
obj.SetMasterVolume(0f, Guid.Empty);
}
else
{
obj.SetMasterVolume(volume, Guid.Empty);
}
}
}
catch (Exception e)
{
Console.WriteLine(e);
}
}
}
Marshal.ReleaseComObject(sessionEnumerator);
Marshal.ReleaseComObject(mgr);
}
catch (Exception spotify_hire_me)
{
Console.WriteLine(spotify_hire_me);
}
finally
{
Marshal.ReleaseComObject(sessionEnumerator);
Marshal.ReleaseComObject(mgr);
}
return;
}