// Create a list of ManagedAudioMedia from audio file being imported
// Split by duration, unless 0 or less.
private List <ManagedAudioMedia> ImportAudioFromFile(string path, double durationMs)
{
ManagedAudioMedia media = ImportAudioFromFile(path);
double totalDuration = media.Duration.AsMilliseconds;
// if duration is 0 or less, just one phrase
int phrases = durationMs <= 0.0 ? 1 : (int)Math.Floor(totalDuration / durationMs);
double lastPhraseBegin = phrases * durationMs;
double remaining = totalDuration - lastPhraseBegin;
if (remaining < durationMs / 10.0)
{
lastPhraseBegin -= durationMs;
}
else
{
++phrases;
}
List <ManagedAudioMedia> audioMediaList = new List <ManagedAudioMedia>(phrases);
for (double time = lastPhraseBegin; time > 0.0; time -= durationMs)
{
audioMediaList.Insert(0, media.Split(new Time((long)(time * Time.TIME_UNIT))));
}
audioMediaList.Insert(0, media);
return(audioMediaList);
}
/// <summary>
/// < Detects phrases, accepts timing parameters in milliseconds
/// </summary>
/// <param name="audio"></param>
/// <param name="threshold"></param>
/// <param name="GapLength"></param>
/// <param name="before"></param>
/// <returns></returns>
public static List <ManagedAudioMedia> Apply(ManagedAudioMedia audio, long threshold, double GapLength, double before)
{
AudioLibPCMFormat audioPCMFormat = new AudioLibPCMFormat(audio.AudioMediaData.PCMFormat.Data.NumberOfChannels, audio.AudioMediaData.PCMFormat.Data.SampleRate, audio.AudioMediaData.PCMFormat.Data.BitDepth);
List <long> timingList = AudioLib.PhraseDetection.Apply(audio.AudioMediaData.OpenPcmInputStream(),
audioPCMFormat,
threshold,
(long)GapLength * AudioLibPCMFormat.TIME_UNIT,
(long)before * AudioLibPCMFormat.TIME_UNIT);
List <ManagedAudioMedia> detectedAudioMediaList = new List <ManagedAudioMedia>();
//Console.WriteLine("returned list count " + timingList.Count);
if (timingList == null)
{
detectedAudioMediaList.Add(audio);
}
else
{
for (int i = timingList.Count - 1; i >= 0; i--)
{
//Console.WriteLine("splitting " + timingList[i] + " asset time " + audio.Duration.AsLocalUnits);
ManagedAudioMedia splitAsset = audio.Split(new Time(Convert.ToInt64(timingList[i])));
//ManagedAsset.MediaData.getMediaDataManager().addMediaData(splitAsset.MediaData);
detectedAudioMediaList.Insert(0, splitAsset);
//MessageBox.Show(Convert.ToDouble(alPhrases[i]).ToString());
}
if (RetainSilenceInBeginningOfPhrase && audio.Duration.AsMilliseconds > 200)
{
detectedAudioMediaList.Insert(0, audio);
}
}
return(detectedAudioMediaList);
}
/// <summary>
/// Stop recording or monitoring.
/// </summary>
public void Stop()
{
bool wasRecording = mRecorder.CurrentState == AudioLib.AudioRecorder.State.Recording;
if (wasRecording)
{
ApplyPhraseDetectionOnTheFly(null); //@onTheFly: before stopping last chunk of memory stream is passed into phrase detection
}
if (mRecorder.CurrentState == AudioLib.AudioRecorder.State.Monitoring ||
wasRecording)
{
if (wasRecording && mPhraseMarks.Count > 0)
{
FinishedPhrase();
}
mRecorder.StopRecording();
if (wasRecording)
{
for (int i = m_PhraseMarksOnTheFly.Count - 2; i >= 0; --i)
{
if (i != 0 && i < m_PhraseMarksOnTheFly.Count &&
(m_PhraseMarksOnTheFly[i] - m_PhraseMarksOnTheFly[i - 1]) <= 250)
{
m_PhraseMarksOnTheFly.Remove(m_PhraseMarksOnTheFly[i]);
i++;
}
else if (i == 0 && i < m_PhraseMarksOnTheFly.Count &&
m_PhraseMarksOnTheFly[i] <= 250)
{
m_PhraseMarksOnTheFly.Remove(m_PhraseMarksOnTheFly[i]);
i++;
}
}
for (int i = mPhraseMarks.Count - 2; i >= 0; --i)
{
if (mPhraseMarks[i] < mSessionMedia.Duration.AsMilliseconds && mSessionMedia.Duration.AsMilliseconds > 200)
{
ManagedAudioMedia split = mSessionMedia.Split(new Time(Convert.ToInt64(mPhraseMarks[i] * Time.TIME_UNIT)));
mAudioList.Insert(mSessionOffset, split);
}
else
{
MessageBox.Show(Localizer.Message("RecordingSession_SplitError"), Localizer.Message("Caption_Warning"));
}
}
// The first asset is what remains of the session asset
mAudioList.Insert(mSessionOffset, mSessionMedia);
}
mRecordingUpdateTimer.Enabled = false;
}
}
