private async Task <ResultModel <string> > DoFragmentAsr(byte[] data, FrameState state = FrameState.First)
{
try
{
if (_ws == null && _status == FrameState.First)
{
_ws = new ClientWebSocket();
_status = FrameState.First;
_host = ApiAuthorization.BuildAuthUrl(_settings);
await _ws.ConnectAsync(new Uri(_host), CancellationToken.None);
if (_ws.State != WebSocketState.Open)
{
throw new Exception("Connect to xfyun api server failed.");
}
_receiveTask = StartReceiving(_ws);
}
//开始发送数据
for (int i = 0; i < data.Length; i += _frameSize)
{
byte[] buffer = null;
if (_rest.Length == 0) //没有上次分片的数据
{
if (data.Length - i < _frameSize) //最后一帧不满一个完整的识别帧，那么加入缓存，下个分片的时候继续使用
{
if (state != FrameState.Last)
{
int length = data.Length - i;
Array.Copy(data, i, _rest.Cache, 0, length);
_rest.Length = length;
}
else
{
buffer = SubArray(data, i, _frameSize);
_status = FrameState.Last;
}
}
else
{
buffer = SubArray(data, i, _frameSize);
if (state == FrameState.Last && data.Length - i == _frameSize)
{
_status = FrameState.Last;
if (buffer == null)
{
buffer = new byte[1] {
0
};
}
}
}
}
else //有上次分片的数据
{
if (data.Length + _rest.Length <= _frameSize)
{
buffer = new byte[_rest.Length + data.Length];
Array.Copy(_rest.Cache, 0, buffer, 0, _rest.Length);
//最后分片加上缓存不满一个帧大小的情况
Array.Copy(data, i, buffer, _rest.Length, data.Length);
_status = FrameState.Last;
i = data.Length - _frameSize;
}
else
{
buffer = new byte[_frameSize];
Array.Copy(_rest.Cache, 0, buffer, 0, _rest.Length);
Array.Copy(data, i, buffer, _rest.Length, _frameSize - _rest.Length);
i -= _rest.Length;
}
_rest.Clear(); //清空
}
if (_rest.Length != 0)
{
break;
}
switch (_status)
{
case FrameState.First:
FirstFrameData firstFrame = new FirstFrameData
{
common = _common,
business = _business,
data = _data
};
firstFrame.data.status = FrameState.First;
firstFrame.data.audio = System.Convert.ToBase64String(buffer);
await _ws.SendAsync(new ArraySegment <byte>(Encoding.UTF8.GetBytes(JsonSerializer.Serialize(firstFrame)))
, WebSocketMessageType.Text
, true
, CancellationToken.None);
_status = FrameState.Continue;
break;
case FrameState.Continue: //中间帧
ContinueFrameData continueFrame = new ContinueFrameData
{
data = _data
};
continueFrame.data.status = FrameState.Continue;
continueFrame.data.audio = System.Convert.ToBase64String(buffer);
await _ws.SendAsync(new ArraySegment <byte>(Encoding.UTF8.GetBytes(JsonSerializer.Serialize(continueFrame)))
, WebSocketMessageType.Text
, true
, CancellationToken.None);
break;
case FrameState.Last: // 最后一帧音频
LastFrameData lastFrame = new LastFrameData
{
data = _data
};
lastFrame.data.status = FrameState.Last;
lastFrame.data.audio = System.Convert.ToBase64String(buffer);
await _ws.SendAsync(new ArraySegment <byte>(Encoding.UTF8.GetBytes(JsonSerializer.Serialize(lastFrame)))
, WebSocketMessageType.Text
, true
, CancellationToken.None);
break;
}
await Task.Delay(_intervel);
}
if (state == FrameState.Last)
{
while (_receiveTask.Status != TaskStatus.RanToCompletion)
{
await Task.Delay(10);
}
await _ws.CloseAsync(WebSocketCloseStatus.NormalClosure, "NormalClosure", CancellationToken.None);
}
return(new ResultModel <string>()
{
Code = ResultCode.Success,
Data = null,
});
}
catch (Exception ex)
{
//服务器主动断开连接或者自动断开连接了
if (ex.Message.ToLower().Contains("unable to read data from the transport connection"))
{
try
{
await _ws.CloseAsync(WebSocketCloseStatus.NormalClosure, "NormalClosure", CancellationToken.None);
}
catch { }
while (_receiveTask.Status != TaskStatus.RanToCompletion)
{
await Task.Delay(10);
}
return(new ResultModel <string>()
{
Code = ResultCode.Disconnect,
Message = "服务器主动断开连接，可能是整个会话是否已经超过了60s、读取数据超时、静默检测超时等原因引起的。",
});
}
else
{
return(new ResultModel <string>()
{
Code = ResultCode.Error,
Message = ex.Message,
});
}
}
}
/// <summary>
/// 语音转写一个完整的音频文件
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public async Task <ResultModel <string> > ConvertAudio(byte[] data)
{
try
{
using (_ws = new ClientWebSocket())
{
Status = ServiceStatus.Running;
_host = ApiAuthorization.BuildAuthUrl(_settings);
await _ws.ConnectAsync(new Uri(_host), CancellationToken.None);
_receiveTask = StartReceiving(_ws);
//开始发送数据
for (int i = 0; i < data.Length; i += _frameSize)
{
byte[] buffer = SubArray(data, i, _frameSize);
if (buffer == null || data.Length - i < _frameSize)
{
_status = FrameState.Last; //文件读完
}
switch (_status)
{
case FrameState.First:
FirstFrameData firstFrame = new FirstFrameData
{
common = _common,
business = _business,
data = _data
};
firstFrame.data.status = FrameState.First;
firstFrame.data.audio = System.Convert.ToBase64String(buffer);
await _ws.SendAsync(new ArraySegment <byte>(Encoding.UTF8.GetBytes(JsonSerializer.Serialize(firstFrame)))
, WebSocketMessageType.Text
, true
, CancellationToken.None);
_status = FrameState.Continue;
break;
case FrameState.Continue: //中间帧
ContinueFrameData continueFrame = new ContinueFrameData
{
data = _data
};
continueFrame.data.status = FrameState.Continue;
continueFrame.data.audio = System.Convert.ToBase64String(buffer);
await _ws.SendAsync(new ArraySegment <byte>(Encoding.UTF8.GetBytes(JsonSerializer.Serialize(continueFrame)))
, WebSocketMessageType.Text
, true
, CancellationToken.None);
break;
case FrameState.Last: // 最后一帧音频
LastFrameData lastFrame = new LastFrameData
{
data = _data
};
lastFrame.data.status = FrameState.Last;
lastFrame.data.audio = System.Convert.ToBase64String(buffer);
await _ws.SendAsync(new ArraySegment <byte>(Encoding.UTF8.GetBytes(JsonSerializer.Serialize(lastFrame)))
, WebSocketMessageType.Text
, true
, CancellationToken.None);
break;
}
await Task.Delay(_intervel);
}
while (_receiveTask.Status != TaskStatus.RanToCompletion)
{
await Task.Delay(10);
}
await _ws.CloseAsync(WebSocketCloseStatus.NormalClosure, "NormalClosure", CancellationToken.None);
}
StringBuilder result = new StringBuilder();
foreach (var item in _result)
{
result.Append(item.data);
}
ResetState();
return(new ResultModel <string>()
{
Code = ResultCode.Success,
Data = result.ToString(),
});
}
catch (Exception ex)
{
return(new ResultModel <string>()
{
Code = ResultCode.Error,
Message = ex.Message,
});
}
}
public async Task <ResultModel <string> > Convert(byte[] data)
{
try
{
int frameSize = 1280, intervel = 10;
FrameState status = FrameState.First;
string host = BuildAuthUrl();
using (var ws = new ClientWebSocket())
{
await ws.ConnectAsync(new Uri(host), CancellationToken.None);
StartReceiving(ws);
//开始发送数据
for (int i = 0; i < data.Length; i += frameSize)
{
byte[] buffer = SubArray(data, i, frameSize);
if (buffer == null)
{
status = FrameState.Last; //文件读完
}
switch (status)
{
case FrameState.First:
FirstFrameData firstFrame = new FirstFrameData
{
common = _common,
business = _business,
data = _data
};
firstFrame.data.status = FrameState.First;
firstFrame.data.audio = System.Convert.ToBase64String(buffer);
await ws.SendAsync(new ArraySegment <byte>(Encoding.UTF8.GetBytes(JsonHelper.SerializeObject(firstFrame)))
, WebSocketMessageType.Text
, true
, CancellationToken.None);
status = FrameState.Continue;
break;
case FrameState.Continue: //中间帧
ContinueFrameData continueFrame = new ContinueFrameData
{
data = _data
};
continueFrame.data.status = FrameState.Continue;
continueFrame.data.audio = System.Convert.ToBase64String(buffer);
await ws.SendAsync(new ArraySegment <byte>(Encoding.UTF8.GetBytes(JsonHelper.SerializeObject(continueFrame)))
, WebSocketMessageType.Text
, true
, CancellationToken.None);
break;
case FrameState.Last: // 最后一帧音频
LastFrameData lastFrame = new LastFrameData
{
data = _data
};
lastFrame.data.status = FrameState.Last;
lastFrame.data.audio = System.Convert.ToBase64String(buffer);
await ws.SendAsync(new ArraySegment <byte>(Encoding.UTF8.GetBytes(JsonHelper.SerializeObject(lastFrame)))
, WebSocketMessageType.Text
, true
, CancellationToken.None);
break;
}
await Task.Delay(intervel);
}
}
return(new ResultModel <string>()
{
Code = ResultCode.Success,
Data = _resultStringBuilder == null ? "" : _resultStringBuilder.ToString(),
});
}
catch (Exception ex)
{
return(new ResultModel <string>()
{
Code = ResultCode.Error,
Message = ex.Message,
});
}
}