public IAsyncOperation <AudioFrameReader> OpenAudioFrameReaderAsync()
{
return(Task.Run(async() =>
{
if (AudioReader == null)
{
var microphones = await DeviceInformation.FindAllAsync(DeviceInformation.GetAqsFilterFromDeviceClass(DeviceClass.AudioCapture));
var kinectMicArray = microphones.FirstOrDefault(mic => mic.Name.ToLowerInvariant().Contains("xbox nui sensor"));
if (kinectMicArray != null)
{
//TODO: review parameters
var settings = new AudioGraphSettings(AudioRenderCategory.Speech);
settings.EncodingProperties = AudioEncodingProperties.CreatePcm(16000, 4, 32);
settings.EncodingProperties.Subtype = MediaEncodingSubtypes.Float;
settings.QuantumSizeSelectionMode = QuantumSizeSelectionMode.LowestLatency;
settings.DesiredRenderDeviceAudioProcessing = Windows.Media.AudioProcessing.Raw;
var audioGraphResult = await AudioGraph.CreateAsync(settings);
if (audioGraphResult.Status == AudioGraphCreationStatus.Success)
{
var inputNodeResult = await audioGraphResult.Graph.CreateDeviceInputNodeAsync(MediaCategory.Speech, audioGraphResult.Graph.EncodingProperties, kinectMicArray);
if (inputNodeResult.Status == AudioDeviceNodeCreationStatus.Success)
{
var output = audioGraphResult.Graph.CreateFrameOutputNode(audioGraphResult.Graph.EncodingProperties);
AudioReader = new AudioFrameReader(audioGraphResult.Graph, output);
}
}
}
}
AudioReader?.Open();
return AudioReader;
}).AsAsyncOperation());
}
/// <summary>
/// Checks whether the device supports smart card reader mode
/// </summary>
/// <returns>None</returns>
public static async Task <DeviceInformation> GetFirstSmartCardReaderInfo(SmartCardReaderKind readerKind = SmartCardReaderKind.Any)
{
// Check if the SmartCardConnection API exists on this currently running SKU of Windows
if (!Windows.Foundation.Metadata.ApiInformation.IsTypePresent("Windows.Devices.SmartCards.SmartCardConnection"))
{
// This SKU of Windows does not support NFC card reading, only desktop and phones/mobile devices support NFC card reading
return(null);
}
// Device selector string is from SmartCardReader.GetDeviceSelector(SmartCardReaderKind.Nfc) except that we remove the conditional
// about the interface being enabled, since we want to get the device object regardless of whether the user turned it off in the CPL
string query = "System.Devices.InterfaceClassGuid:=\"{DEEBE6AD-9E01-47E2-A3B2-A66AA2C036C9}\"";
//if (readerKind != SmartCardReaderKind.Any)
//{
// query += " AND System.Devices.SmartCards.ReaderKind:=" + (int)readerKind;
//}
DeviceInformationCollection devices = await DeviceInformation.FindAllAsync(query);
if (devices.Count == 0)
{
devices = await DeviceInformation.FindAllAsync("System.Devices.InterfaceClassGuid:=\"{9a2fc585-7316-46f1-9577-500920304f9d}\"");
}
// There is a bug on some devices that were updated to WP8.1 where an NFC SmartCardReader is
// enumerated despite that the device does not support it. As a workaround, we can do an additonal check
// to ensure the device truly does support it.
var workaroundDetect = await DeviceInformation.FindAllAsync("System.Devices.InterfaceClassGuid:=\"{50DD5230-BA8A-11D1-BF5D-0000F805F530}\"");
if (workaroundDetect.Count == 0 || devices.Count == 0)
{
// Not supported
if (readerKind == SmartCardReaderKind.Any)
{
query = DeviceInformation.GetAqsFilterFromDeviceClass(DeviceClass.ImageScanner);
workaroundDetect = await DeviceInformation.FindAllAsync(query);
if (workaroundDetect.Count == 0)
{
workaroundDetect = await DeviceInformation.FindAllAsync();
if (workaroundDetect.Count == 0)
{
return(null);
}
foreach (var item in workaroundDetect)
{
if (item.Name.ToLower().Contains("NPX".ToLower()) ||
item.Name.ToLower().Contains("Proximity".ToLower()) ||
item.Name.ToLower().Contains("Near".ToLower()))
{
return((from d in workaroundDetect
where d.IsEnabled
orderby d.IsDefault descending
select d).FirstOrDefault());
}
}
}
;
}
}
else if (devices.Count == 0 && workaroundDetect.Count > 0)
{
devices = workaroundDetect;
}
// Smart card reader supported, but may be disabled
return((from d in devices
where d.IsEnabled
orderby d.IsDefault descending
select d).FirstOrDefault());
}