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[C#] 纯文本查看 复制代码 using System;
using 备份器.DLL;
using Newtonsoft.Json.Linq;
using System.IO;
using Newtonsoft.Json;
namespace 百度开放测试
{
public class BaiDuSDK
{
private HttpDLL HTTP = new HttpDLL();
private string token = "";
/// <summary>
/// 初始化
/// </summary>
/// <param name="APIKey">百度API Key</param>
/// <param name="SecretKey">百度Secret Key</param>
public BaiDuSDK(string APIKey, string SecretKey)
{
GetToken( APIKey,SecretKey);
}
/// <summary>
/// Wav识别 ，百度传进来的文件有格式要求，格式不正常通常识别不正确比如：多个不一样文件都是返回一个“的”字
/// 注意你的音频文件的采样率别搞错，目前百度只支持8000，16000的采样率
/// </summary>
/// <param name="filename">文件名称</param>
/// <param name="rate">8000,16000采样率</param>
/// <param name="lan">中英标识（zh中文 , en英文）</param>
/// <returns></returns>
public string WavToText(string filename , string lan)
{
if (File.Exists(filename))
{
WavInfo wav =GetWavInfo(filename);
int rate = int.Parse(wav.dwsamplespersec.ToString());
//非16bit 位深的直接返回错误
if (int.Parse(wav.wbitspersample.ToString()) != 16) return "错误：原始语音的录音格式目前只支持评测 8k/16k 采样率 16bit 位深的单声道语音，请自行转换";
int cuid =11111;//这个随便填
Byte[] byt = File.ReadAllBytes(filename);
int len = byt.Length;
string base64String = Convert.ToBase64String(byt);
Customer cust = new Customer("wav", rate, 1, token, cuid, len, lan, base64String);
string jsonStr = JsonConvert.SerializeObject(cust); //序列化成 Json 格式
string html = HTTP.Post("http://vop.baidu.com/server_api", jsonStr, "", "https://openapi.baidu.com/");
try
{
JObject jsons = JObject.Parse(html);
if (jsons["err_msg"].Value<string>() == "success.")
{
return jsons["result"][0].ToString();
}
else
{
return jsons["err_msg"].Value<string>();
}
}
catch (Exception)
{
//异常提示。表示返回的的非JSON数据，意味着参数错误或不支持格式
return html;
}
}
else
{
return "文件不存在";
}
}
/// <summary>
/// 取出access_token
/// </summary>
private void GetToken(string APIKey,string SecretKey)
{
string s = HTTP.GetHtml("https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials&client_id=" + APIKey + "&client_secret=" + SecretKey,
"",
"https://openapi.baidu.com/");
JObject json = JObject.Parse(s);
token = json["access_token"].Value<string>();
}
public struct WavInfo
{
public string groupid;
public string rifftype;
public long filesize;
public string chunkid;
public long chunksize;
public short wformattag; //记录着此声音的格式代号，例如WAVE_FORMAT_PCM，WAVE_F0RAM_ADPCM等等。
public ushort wchannels; //记录声音的频道数。
public ulong dwsamplespersec;//记录每秒采样率。 16000
public ulong dwavgbytespersec;//记录每秒的数据量。
public ushort wblockalign;//记录区块的对齐单位。
public ushort wbitspersample;//记录每个取样所需的位元数。 位深16
public string datachunkid;
public long datasize;
}
/// <summary>
/// 取出WAV头信息
/// </summary>
/// <param name="strpath"></param>
/// <returns></returns>
private static WavInfo GetWavInfo(string strpath)
{
WavInfo wavInfo = new WavInfo();
FileInfo fi = new FileInfo(strpath);
using (System.IO.FileStream fs = fi.OpenRead())
{
if (fs.Length >= 44)
{
byte[] bInfo = new byte[44];
fs.Read(bInfo, 0, 44);
System.Text.Encoding.Default.GetString(bInfo, 0, 4);
if (System.Text.Encoding.Default.GetString(bInfo, 0, 4) == "RIFF" && System.Text.Encoding.Default.GetString(bInfo, 8, 4) == "WAVE" && System.Text.Encoding.Default.GetString(bInfo, 12, 4) == "fmt ")
{
wavInfo.groupid = System.Text.Encoding.Default.GetString(bInfo, 0, 4);
System.BitConverter.ToInt32(bInfo, 4);
wavInfo.filesize = System.BitConverter.ToInt32(bInfo, 4);
//wavInfo.filesize = Convert.ToInt64(System.Text.Encoding.Default.GetString(bInfo,4,4));
wavInfo.rifftype = System.Text.Encoding.Default.GetString(bInfo, 8, 4);
wavInfo.chunkid = System.Text.Encoding.Default.GetString(bInfo, 12, 4);
wavInfo.chunksize = System.BitConverter.ToInt32(bInfo, 16);
wavInfo.wformattag = System.BitConverter.ToInt16(bInfo, 20);
wavInfo.wchannels = System.BitConverter.ToUInt16(bInfo, 22);
wavInfo.dwsamplespersec = System.BitConverter.ToUInt32(bInfo, 24);
wavInfo.dwavgbytespersec = System.BitConverter.ToUInt32(bInfo, 28);
wavInfo.wblockalign = System.BitConverter.ToUInt16(bInfo, 32);
wavInfo.wbitspersample = System.BitConverter.ToUInt16(bInfo, 34);
wavInfo.datachunkid = System.Text.Encoding.Default.GetString(bInfo, 36, 4);
wavInfo.datasize = System.BitConverter.ToInt32(bInfo, 40);
}
}
}
return wavInfo;
}
}
/// <summary>
/// 定义JSON数据的一个类
/// </summary>
public class Customer
{
public string format { get; set; }
public int rate { get; set; }
public int channel { get; set; }
public string token { get; set; }
public int len { get; set; }
public int cuid { get; set; }
public string lan { get; set; }
public string speech { get; set; }
public Customer()
{
}
/// <summary>
/// json参数 百度还有其它参数看需求自己加
/// </summary>
/// <param name="format">文件类型</param>
/// <param name="rate">采样率</param>
/// <param name="channel">声道</param>
/// <param name="token">access_token 帮助文档说有效期一个月。所以没必要多次申请</param>
/// <param name="cuid">用户 id，推荐使用 mac 地址/手机IMEI 等类似参数 实际上任何参数都可以</param>
/// <param name="len">文件长度</param>
/// <param name="lan">中英标识（zh中文 , en英文）</param>
/// <param name="speech">文件的base64String编码</param>
public Customer(string format, int rate, int channel, string token, int cuid, int len, string lan, string speech)
{
this.format = format;
this.rate = rate;
this.channel = channel;
this.token = token;
this.len = len;
this.speech = speech;
this.cuid = cuid;
this.lan = lan;
}
}
}
百度申请KEY很简单一天就过，没事写着玩
外部调用
[C#] 纯文本查看 复制代码 private BaiDuSDK baidu = new BaiDuSDK(“你的百度API Key”,“你的百度Secret Key”);
txtresult.Text = baidu.WavToText(file, "zh");
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窥视卡
雷达卡
发表于 2014-6-28 02:19:08
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发表于 2014-6-28 08:04:45
楼主