/// ------------------------------------------------------------------------------------
/// <summary>
///
/// </summary>
/// ------------------------------------------------------------------------------------
private bool Initialize(string audioFilePath)
{
m_doc = SaAudioDocument.Load(audioFilePath, false, true);
if (m_doc != null)
{
ResetSegmentEnumerators();
return(true);
}
try
{
using (AudioReader audioReader = new AudioReader())
{
AudioReader.InitResult result = audioReader.Initialize(audioFilePath);
if (result == AudioReader.InitResult.FileNotFound)
{
return(false);
}
if ((result == AudioReader.InitResult.InvalidFormat))
{
return(false);
}
// Try reading data from older SA audio files, converting
// it to Unicode along the way.
if (!audioReader.Read(true))
{
return(false);
}
// Now try reading the companion transcription file again.
m_doc = SaAudioDocument.Load(audioFilePath, false, false);
ResetSegmentEnumerators();
}
}
catch
{
return(false);
}
return(true);
}
/// ------------------------------------------------------------------------------------
/// <summary>
/// Converts the specified millisecond value to a byte offset used (and only understood
/// by SA) for altered speed playback in SA.
/// </summary>
/// ------------------------------------------------------------------------------------
public static long MillisecondValueToBytes(long millisecondVal, string filename)
{
using (var reader = new AudioReader())
{
if (reader.Initialize(filename) == AudioReader.InitResult.FileNotFound)
{
return(0);
}
// Assume the bytes per second is 44100, which it will be if the audio file
// is not a wave file.
long bytesPerSecond = 44100;
if (reader.IsValidWaveFile())
{
bytesPerSecond = reader.BytesPerSecond;
}
return((millisecondVal * bytesPerSecond) / 1000);
}
}