/// <summary>
/// 把文本转换成声音，写入指定的内存流
/// </summary>
/// <param name="text">要转化成语音的文字</param>
/// <param name="stream">合成结果输出的音频流</param>
protected void RawAudioFromText(List <SpeechPart> output, string text)
{
if (string.IsNullOrWhiteSpace(text))
{
return;
}
try
{
if (this.SessionId == null)
{
this.SessionId = TTSInterop.SessionBegin(
new TtsSessionParameters(this.Speaker, this.Speed, this.Volume, this.SampleRate));
}
TTSInterop.TextPut(this.SessionId, text, null);
SynthStatusEnums synth_status = SynthStatusEnums.TTS_FLAG_STILL_HAVE_DATA;
int lastTextOffset = 0; //上次结果对应文本偏移量
int lastTextLength = 0; //上次结果对应文本长度
byte[] tmpArray = Encoding.Unicode.GetBytes(text);
while (synth_status == SynthStatusEnums.TTS_FLAG_STILL_HAVE_DATA)
{
byte[] audioData = TTSInterop.AudioGet(this.SessionId, ref synth_status);
string posStr = TTSInterop.AudioInfo(this.SessionId);
int currentPosition = int.Parse(posStr.Substring(4));
if (currentPosition - (lastTextOffset + lastTextLength) <= 0)
{//还是上次那段文本的结果
//保持不变
}
else
{//新段文本的结果
lastTextOffset = lastTextOffset + lastTextLength;
lastTextLength = currentPosition - lastTextOffset;
}
SpeechPart speechPart = new SpeechPart(
lastTextOffset / 2,
lastTextLength / 2,
tmpArray.Length / 2,
Encoding.Unicode.GetString(tmpArray, lastTextOffset, lastTextLength),
audioData);
if (ProgressChanged != null)
{
ProgressChanged(this, new ProgressChangedEventArgs(speechPart));
}
output.Add(speechPart);
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
return;
}
finally
{
TTSInterop.SessionEnd(this.SessionId, "normal end");
this.SessionId = null;
}
}
public ProgressChangedEventArgs(SpeechPart data)
{
this.Data = data;
}