private Task <SpeakPosition> PrepareAudioFile()
{
SpeakPosition speakPosition = GetNextSpeakPosition();
if (speakPosition == null)
{
return(Task.FromResult <SpeakPosition>(null));
}
string text = _textBase[speakPosition.textBaseIndex].Text;
return(Task.Run(() =>
{
try
{
Swap(ref _audioFilePath, ref _audioFilePathNext);
speakPosition.filePath = _audioFilePathNext;
if (!SpeakToFile(speakPosition.filePath, text))
{
return null;
}
return speakPosition;
}
catch (System.OperationCanceledException)
{
return null;
}
}));
}
private SpeakPosition GetNextSpeakPosition()
{
SpeakPosition speakPosition = new SpeakPosition();
while (true)
{
bool isEnd = false;
if (Random)
{
if (_randomIndexes == null)
{
_randomIndexes = Enumerable.Range(0, _textBase.Count).ToList();
}
if (_randomIndexes.Count > 0)
{
speakPosition.isRandom = true;
speakPosition.randomIndex = _random.Next(_randomIndexes.Count);
speakPosition.textBaseIndex = _randomIndexes[speakPosition.randomIndex];
}
else
{
isEnd = true;
}
}
else
{
speakPosition.isRandom = false;
speakPosition.textBaseIndex = _currentTextBaseIndex + 1;
isEnd = speakPosition.textBaseIndex >= _textBase.Count;
}
if (!isEnd)
{
return(speakPosition);
}
if (Repeat && IsReady)
{
_randomIndexes = null;
_currentTextBaseIndex = -1;
continue;
}
return(null);
}
}
private void SpeakNext()
{
_player.Stop();
if (State != TalkerStatus.Run)
{
return;
}
if (_taskAudioFilePreparation == null)
{
_player.Close();
_taskAudioFilePreparation = PrepareAudioFile();
}
SpeakPosition speakPosition = _taskAudioFilePreparation.Result;
if (speakPosition != null)
{
PlayAudio(speakPosition.filePath);
_currentTextBaseIndex = speakPosition.textBaseIndex;
SpeakElementChanged?.Invoke(speakPosition.textBaseIndex);
if (speakPosition.isRandom)
{
_randomIndexes.RemoveAt(speakPosition.randomIndex);
}
_taskAudioFilePreparation = PrepareAudioFile();
}
else
{
Stop();
}
}
