/// <summary>
/// Converts a collection of stream strings to DataTypeIDs (Guids) that can be played back to the Kinect sensor
/// </summary>
/// <param name="streamNames">Collection of strings to convert to Guids</param>
/// <returns>Collection of Guids, which includes DataTypeIDs for each stream</returns>
internal static HashSet <Guid> ConvertStreamsToPlaybackGuids(IEnumerable <string> streamNames)
{
if (streamNames == null)
{
throw new ArgumentNullException("streamNames");
}
if (streamNames.Count <string>() == 0)
{
throw new InvalidOperationException(Strings.ErrorNoStreams);
}
HashSet <Guid> streamGuids = StreamSupport.ConvertStreamsToGuids(streamNames);
// remove body streams from the playback collection
if (streamGuids.Contains(KStudioEventStreamDataTypeIds.Body))
{
Console.WriteLine(Strings.WarningIgnoreBodyDuringPlayback);
streamGuids.Remove(KStudioEventStreamDataTypeIds.Body);
}
if (streamGuids.Contains(KStudioEventStreamDataTypeIds.BodyIndex))
{
Console.WriteLine(Strings.WarningIgnoreBodyIndexDuringPlayback);
streamGuids.Remove(KStudioEventStreamDataTypeIds.BodyIndex);
}
return(streamGuids);
}
/// <summary>
/// Converts a collection of stream strings to DataTypeIDs (Guids)
/// </summary>
/// <param name="streamNames">Collection of strings to convert to Guids</param>
/// <returns>Collection of Guids, which includes DataTypeIDs for each stream</returns>
internal static HashSet <Guid> ConvertStreamsToGuids(IEnumerable <string> streamNames)
{
if (streamNames == null)
{
throw new ArgumentNullException("streamNames");
}
if (streamNames.Count <string>() == 0)
{
throw new InvalidOperationException(Strings.ErrorNoStreams);
}
HashSet <Guid> streamGuids = new HashSet <Guid>();
foreach (string streamName in streamNames)
{
streamGuids.Add(StreamSupport.ConvertStreamStringToGuid(streamName));
}
return(streamGuids);
}
/// <summary>
/// Updates (add/edits) stream-level metadata in an event file
/// </summary>
/// <param name="client">KStudioClient to use for accessing the event file</param>
/// <param name="fileName">Path to event file</param>
/// <param name="streamName">Name of stream which should contain the metadata</param>
/// <param name="type">Type of metadata to update (Public or Personal)</param>
/// <param name="key">Key of metadata object to add/edit</param>
/// <param name="value">Value of metadata object to add/edit</param>
/// <returns>String which contains the updated contents of the target metadata object</returns>
public static string UpdateStreamMetadata(KStudioClient client, string fileName, string streamName, KStudioMetadataType type, string key, object value)
{
if (client == null)
{
throw new ArgumentNullException("client");
}
if (string.IsNullOrEmpty(fileName))
{
throw new ArgumentNullException("fileName");
}
if (string.IsNullOrEmpty(streamName))
{
throw new ArgumentNullException("streamName");
}
string metadataText = string.Empty;
using (KStudioEventFile file = client.OpenEventFileForEdit(fileName))
{
// find the stream in the file and alter its metadata
Guid dataTypeId = StreamSupport.ConvertStreamStringToGuid(streamName);
if (dataTypeId == KStudioEventStreamDataTypeIds.Null)
{
throw new InvalidOperationException(Strings.ErrorNullStream);
}
KStudioEventStream stream = file.EventStreams.FirstOrDefault(s => s.DataTypeId == dataTypeId);
if (stream != null)
{
KStudioMetadata metadata = stream.GetMetadata(type);
Metadata.AlterMetadata(metadata, key, value);
metadataText = Metadata.GetMetadataAsText(metadata, type, stream.DataTypeName);
}
}
return(metadataText);
}
/// <summary>
/// Records streams from the Kinect sensor to an event file
/// </summary>
/// <param name="client">KStudioClient which is connected to the Kinect service</param>
/// <param name="filePath">Path to new event file which will be created for recording</param>
/// <param name="duration">How long the recording should last before being stopped</param>
/// <param name="streamNames">Collection of streams to include in the recording</param>
public static void RecordClip(KStudioClient client, string filePath, TimeSpan duration, IEnumerable <string> streamNames)
{
if (client == null)
{
throw new ArgumentNullException("client");
}
if (!client.IsServiceConnected)
{
throw new InvalidOperationException(Strings.ErrorNotConnected);
}
if (string.IsNullOrEmpty(filePath))
{
throw new ArgumentNullException("filePath");
}
HashSet <Guid> streamDataTypeIds = new HashSet <Guid>();
KStudioEventStreamSelectorCollection streamCollection = new KStudioEventStreamSelectorCollection();
KStudioRecording recording = null;
// decide which streams to record
if (streamNames != null && streamNames.Count <string>() > 0)
{
streamDataTypeIds = StreamSupport.ConvertStreamsToGuids(streamNames);
StreamSupport.VerifyStreamsForRecordAndPlayback(streamDataTypeIds);
}
else
{
if (Path.GetExtension(filePath).ToLower().Equals(Strings.XrfExtension))
{
streamDataTypeIds.Add(KStudioEventStreamDataTypeIds.RawIr);
}
else
{
streamDataTypeIds.Add(KStudioEventStreamDataTypeIds.Ir);
streamDataTypeIds.Add(KStudioEventStreamDataTypeIds.Depth);
streamDataTypeIds.Add(KStudioEventStreamDataTypeIds.Body);
streamDataTypeIds.Add(KStudioEventStreamDataTypeIds.BodyIndex);
}
}
// verify streams are recordable by the Kinect sensor
foreach (Guid stream in streamDataTypeIds)
{
KStudioEventStream eventStream = client.GetEventStream(stream, KStudioEventStreamSemanticIds.KinectDefaultSensorProducer);
if (!eventStream.IsRecordable)
{
throw new InvalidOperationException(string.Format(Strings.ErrorRecordingStreamNotSupported, StreamSupport.ConvertStreamGuidToString(stream)));
}
streamCollection.Add(stream);
}
// fix file extension, if necessary
if (streamDataTypeIds.Contains(KStudioEventStreamDataTypeIds.RawIr) && Path.GetExtension(filePath).ToUpperInvariant().Equals(Strings.XefExtension.ToUpperInvariant()))
{
Path.ChangeExtension(filePath, Strings.XrfExtension);
}
// attempt to record streams for the specified duration
try
{
recording = client.CreateRecording(filePath, streamCollection);
}
catch (Exception)
{
//K4W supports uncompressed and compressed color, so if we get an error, try recording the other type
streamCollection = StreamSupport.CreateStreamCollection(streamDataTypeIds, true);
recording = client.CreateRecording(filePath, streamCollection);
}
using (recording)
{
recording.StartTimed(duration);
while (recording.State == KStudioRecordingState.Recording)
{
Thread.Sleep(500);
}
if (recording.State == KStudioRecordingState.Error)
{
throw new InvalidOperationException(Strings.ErrorRecordingFailed);
}
}
}
/// <summary>
/// Verifies that the streams selected for playback exist in the file and are capable of being played on the service
/// </summary>
/// <param name="client">KStudioClient which is connected to the Kinect service</param>
/// <param name="filePath">Path to file that will be played back</param>
/// <param name="playbackStreams">Collection of streams which have been selected for playback</param>
private static void VerifyStreamsForPlayback(KStudioClient client, string filePath, IEnumerable <Guid> playbackStreams)
{
if (client == null)
{
throw new ArgumentNullException("client");
}
if (!client.IsServiceConnected)
{
throw new InvalidOperationException(Strings.ErrorNotConnected);
}
if (string.IsNullOrEmpty(filePath))
{
throw new ArgumentNullException("filePath");
}
if (playbackStreams == null)
{
throw new ArgumentNullException("playbackStreams");
}
// verify stream exists in the file
using (KStudioEventFile file = client.OpenEventFile(filePath))
{
HashSet <Guid> fileStreams = new HashSet <Guid>();
foreach (KStudioEventStream stream in file.EventStreams)
{
fileStreams.Add(stream.DataTypeId);
}
if (!fileStreams.IsSupersetOf(playbackStreams))
{
Guid invalidStream = playbackStreams.First(x => !fileStreams.Contains(x));
throw new InvalidOperationException(string.Format(Strings.ErrorPlaybackStreamNotInFile, StreamSupport.ConvertStreamGuidToString(invalidStream)));
}
}
// verify stream is supported for playback by the Kinect sensor
foreach (Guid stream in playbackStreams)
{
KStudioEventStream eventStream = client.GetEventStream(stream, KStudioEventStreamSemanticIds.KinectDefaultSensorConsumer);
if (!eventStream.IsPlaybackable)
{
throw new InvalidOperationException(string.Format(Strings.ErrorPlaybackStreamNotSupported, StreamSupport.ConvertStreamGuidToString(stream)));
}
}
}
/// <summary>
/// Plays an event file to the Kinect service
/// </summary>
/// <param name="client">KStudioClient which is connected to the Kinect service</param>
/// <param name="filePath">Path to event file which is targeted for playback</param>
/// <param name="streamNames">Collection of streams to include in the playback session</param>
/// <param name="loopCount">Number of times the playback should be repeated before stopping</param>
public static void PlaybackClip(KStudioClient client, string filePath, IEnumerable <string> streamNames, uint loopCount)
{
if (client == null)
{
throw new ArgumentNullException("client");
}
if (!client.IsServiceConnected)
{
throw new InvalidOperationException(Strings.ErrorNotConnected);
}
if (string.IsNullOrEmpty(filePath))
{
throw new ArgumentNullException("filePath");
}
KStudioPlayback playback = null;
// determine if all specified streams are valid for playback
if (streamNames.Count <string>() > 0)
{
HashSet <Guid> playbackDataTypeIds = StreamSupport.ConvertStreamsToPlaybackGuids(streamNames);
StreamSupport.VerifyStreamsForRecordAndPlayback(playbackDataTypeIds);
Playback.VerifyStreamsForPlayback(client, filePath, playbackDataTypeIds);
try
{
KStudioEventStreamSelectorCollection streams = StreamSupport.CreateStreamCollection(playbackDataTypeIds, false);
playback = client.CreatePlayback(filePath, streams);
}
catch (Exception)
{
//K4W supports uncompressed and compressed color, so if we get an error, try playing the other type
KStudioEventStreamSelectorCollection streams = StreamSupport.CreateStreamCollection(playbackDataTypeIds, true);
playback = client.CreatePlayback(filePath, streams);
}
}
else
{
playback = client.CreatePlayback(filePath);
}
// begin playback
using (playback)
{
playback.EndBehavior = KStudioPlaybackEndBehavior.Stop; // this is the default behavior
playback.Mode = KStudioPlaybackMode.TimingEnabled; // this is the default behavior
playback.LoopCount = loopCount;
playback.Start();
while (playback.State == KStudioPlaybackState.Playing)
{
Thread.Sleep(500);
}
if (playback.State == KStudioPlaybackState.Error)
{
throw new InvalidOperationException(Strings.ErrorPlaybackFailed);
}
}
}