/// <summary>
/// Retrieve the Multimedia device ID. If the entry 'DefaultTokenId' is defined in the registry
/// under 'HKEY_CURRENT_USER\SOFTWARE\Microsoft\Speech\AudioOutput' then a multimedia device is looked
/// for with this token. Otherwise, picks the default WAVE_MAPPER is returned.
/// </summary>
internal static int DefaultDeviceOut()
{
int device = -1;
using (ObjectTokenCategory tokenCategory = ObjectTokenCategory.Create(@"HKEY_CURRENT_USER\SOFTWARE\Microsoft\Speech\AudioOutput"))
{
if (tokenCategory != null)
{
string deviceName;
if (tokenCategory.TryGetString(_defaultTokenIdValueName, out deviceName))
{
int pos = deviceName.IndexOf('\\');
if (pos > 0 && pos < deviceName.Length)
{
using (RegistryDataKey deviceKey = RegistryDataKey.Create(deviceName.Substring(pos + 1), Registry.LocalMachine))
{
if (deviceKey != null)
{
device = AudioDeviceOut.GetDevicedId(deviceKey.Name);
}
}
}
}
}
}
return(device);
}
internal static int DefaultDeviceOut()
{
int result = -1;
using (ObjectTokenCategory objectTokenCategory = ObjectTokenCategory.Create("HKEY_CURRENT_USER\\SOFTWARE\\Microsoft\\Speech\\AudioOutput"))
{
if (objectTokenCategory == null)
{
return(result);
}
string value;
if (!objectTokenCategory.TryGetString("DefaultTokenId", out value))
{
return(result);
}
int num = value.IndexOf('\\');
if (num <= 0)
{
return(result);
}
if (num < value.Length)
{
using (RegistryDataKey registryDataKey = RegistryDataKey.Create(value.Substring(num + 1), Registry.LocalMachine))
{
if (registryDataKey != null)
{
return(AudioDeviceOut.GetDevicedId(registryDataKey.Name));
}
return(result);
}
}
return(result);
}
}
/// <summary>
/// Try to get the preferred token for a category
/// </summary>
private static ObjectToken GetPreference(string category, string defaultLocation)
{
ObjectToken token = null;
using (ObjectTokenCategory tokenCategory = ObjectTokenCategory.Create(category))
{
if (tokenCategory != null)
{
string sToken;
if (tokenCategory.TryGetString(defaultLocation, out sToken))
{
token = tokenCategory.OpenToken(sToken);
}
}
}
return(token);
}
private static ObjectToken GetPreference(string category, string defaultLocation)
{
ObjectToken result = null;
using (ObjectTokenCategory objectTokenCategory = ObjectTokenCategory.Create(category))
{
if (objectTokenCategory == null)
{
return(result);
}
string value;
if (objectTokenCategory.TryGetString(defaultLocation, out value))
{
return(objectTokenCategory.OpenToken(value));
}
return(result);
}
}