/// <summary>
/// 文本匹配算法
/// </summary>
/// <param name="fileUrls"></param>
/// <param name="timeSpans"></param>
/// <param name="baidu"></param>
/// <param name="originalText"></param>
/// <returns></returns>
private List <TextContrastResult> GetTextContrast(string[] fileUrls, double[] timeSpans, string[] baidu, string originalText, string lan)
{
//将原文按标点符号分成数组，一个一个的去对比
//string[] originalList = System.Text.RegularExpressions.Regex.Split(originalText, @"[。？！?.!……]").Where(o=>o!=" "&&o!="").ToArray();
string[] originalList = originalText.Replace(".", ".|").Replace("。", "。|").Replace("?", "?|").Replace("？", "？|").Replace("！", "！|").Replace("!", "!|").Replace("……", "……|").Split('|').Where(o => o != " " && o != "").ToArray();
//1.先排除baidu里面没有转成功的
//2.先判断两个数组的长度，一般情况是原文的长度大于等于百度翻译的长度（所以这里会有两种情况）
//3.如果原文的长，开始取百度的第一个跟原文的第一个元素比较，然后再跟原文的第一个加上第二个的字符串比较，如果第二次的百分比大于第一次的百分比，那么继续往下比较
//如果百分比降低了，再比较结尾
double curr_precent = 0; //相似度
string org_contrast = ""; //匹配到的原文
int index = 0;
List <TextContrastResult> list = new List <TextContrastResult>();
for (int i = 0; i < baidu.Length; i++)
{
string bd = baidu[i];
double time = timeSpans[i];
string file = fileUrls[i];
//（注意一点的就是，如果转换的是中文，那么当出现英文时，直接不用匹配，反之亦然）
if (bd != "3301-百度语音转文字出错" && Util.isNotNull(bd))
{
TextContrastResult result = new TextContrastResult();
if (lan == "zh")
{
RecursionHz(bd.Replace(" ", ""), originalList, out org_contrast, out curr_precent, ref index);
}
else
{
RecursionYw(bd, originalList, out org_contrast, out curr_precent, en_index);
}
if (curr_precent <= 50)
{
org_contrast = "未找到匹配的字符串！";
}
result.baiduText = bd;
result.file_url = file;
result.timespan = time;
result.contractText = org_contrast;
result.precent = curr_precent + "%";
list.Add(result);
}
else
{
TextContrastResult result = new TextContrastResult();
result.baiduText = bd;
result.file_url = file;
result.timespan = time;
result.contractText = "";
result.precent = "0%";
list.Add(result);
}
}
return(list);
}
/// <summary>
/// 解析音频文件，获取时间戳，截取音频，语音转文字
/// </summary>
/// <param name="sound_path"></param>
/// <param name="word_path"></param>
/// <param name="language"></param>
/// <param name="splitTime"></param>
public void GetTimeSpanLrc(string sound_path, string word_path, string language, double splitTime = 1.5)
{
string sound_path_mp3 = ""; //音频格式转换后的文件
List <string> cut_sound_files = new List <string> (); //切分后的音频文件
string folder = Path.GetDirectoryName(sound_path);
try
{
if (sound_path.ToLower().EndsWith(".mp3"))
{
sound_path_mp3 = sound_path;
//通过NAudio将文件转换为WAV格式，返回新的文件路径
sound_path = NAudioHelper.GetWavPath(sound_path);
}
//音频处理，通过lrc的时间戳来截取音频与内容
//1.先从lrc里面获取时间戳与内容
if (Path.GetExtension(word_path).Contains("lrc"))
{
Dictionary <TimeSpan, string> lrcs = Util.ReadLrc(word_path);
List <TimeSpan> times = lrcs.Keys.ToList();
for (int i = 0; i < times.Count; i++)
{
TextContrastResult _result = new TextContrastResult();
//2.通过时间戳，截取音频
string cut_sound_file = folder + "\\" + i + "_" + sys.getRandomStr() + Path.GetExtension(sound_path);
TimeSpan _start = new TimeSpan();
TimeSpan _end = new TimeSpan();
if (i == times.Count - 1)
{
_end = TimeSpan.Parse(FfmpegHelper.getMediaDuration(sound_path));
}
else
{
_end = times[i + 1];
}
_start = times[i];
_result.timespan = times[i].TotalSeconds;
_result.contractText = lrcs[times[i]];
_result.baiduText = lrcs[times[i]];
_result.precent = "100%";
bool is_success = FfmpegHelper.CutAudioFile(sound_path, cut_sound_file, _start, _end - _start);
if (is_success)
{
cut_sound_files.Add(cut_sound_file);
}
//上传到服务器
if (File.Exists(cut_sound_file))
{
string server_path = UploadFile.PostFile(cut_sound_file);
_result.file_url = server_path;
}
results.Add(_result);
}
}
//原文
string _originalText = Util.ReadTxt(word_path);
originalText = string.Join("", _originalText.Split('|'));
}
catch (Exception ex)
{
LogHelper.Error(ex.Message);
}
finally
{
isFinish = true;
//删除切分的文件
foreach (string cut_sound_file in cut_sound_files)
{
if (Util.isNotNull(cut_sound_file) && File.Exists(cut_sound_file))
{
File.Delete(cut_sound_file);
}
}
//删除MP3文件
if (Util.isNotNull(sound_path_mp3) && File.Exists(sound_path_mp3))
{
File.Delete(sound_path_mp3);
string mp3_folder = Path.GetDirectoryName(sound_path_mp3);
if (Directory.Exists(mp3_folder) && Directory.GetFiles(mp3_folder).Length == 0)
{
Directory.Delete(mp3_folder);
}
}
//删除word文件
if (File.Exists(word_path))
{
File.Delete(word_path);
//删除word文件目录
string word_folder = Path.GetDirectoryName(word_path);
if (Directory.Exists(word_folder) && Directory.GetFiles(word_folder).Length == 0)
{
Directory.Delete(word_folder);
}
}
//删除文件夹，删除原音频文件
if (File.Exists(sound_path))
{
File.Delete(sound_path);
//删除原音频目录
string sound_folder = Path.GetDirectoryName(sound_path);
if (Directory.Exists(sound_folder) && Directory.GetFiles(sound_folder).Length == 0)
{
Directory.Delete(sound_folder);
}
}
}
}
