public void ReadID3v2(string file)
{
// read id3 stuff
id3v2 = new ID3V2(file);
id3v2.Read();
this.hasID3v2 = id3v2.HasTag;
}
/// <summary>
/// 控制整个解码流程的主函数
/// </summary>
/// <returns></returns>
public bool Start()
{
//文件头
Header mp3_header = new Header(input);
ID3V2 id3V2 = mp3_header.getID3V2();
Data_Frame_Header_Info headerInfo = new Data_Frame_Header_Info();
//设置显示框
if (headerInfo.track_mode == 3)
{
_win.Channels.Text = "1";
_pcmDatas.Channels = 1;
}
else
{
_win.Channels.Text = "2";
_pcmDatas.Channels = 2;
}
int frequency = 0;
while (headerInfo != null)
{
//数据帧头
Data_Frame_Header df = new Data_Frame_Header(input);
headerInfo = df.getHeaderInfo();
if (headerInfo != null && headerInfo.frequency > frequency)
{
frequency = headerInfo.frequency;
}
//文件找不到数据帧或者频率或比特率有问题
if ((headerInfo == null && Data_Frame_Header.begin_of_file) || (headerInfo != null && headerInfo.frequency == 1) || (headerInfo != null && headerInfo.bitrate == 0))
{
return(false);
}
if (headerInfo != null)
{
//获取一帧的数据
byte[] besides_header = new byte[headerInfo.frame_length - 4];
input.Read(besides_header, 0, besides_header.Length);
//进行这一帧的解码
Decode decode = new Decode(headerInfo, besides_header, input, _filename, write);
decode.Start();
}
}
_win.SampleMode.Text = $"{frequency}Hz";
_pcmDatas.Frequency = frequency;
return(true);
}
/// <summary>
/// Initializes a new instance of <see cref="Mp3Tag"/> and read file.
/// </summary>
/// <param name="filename">The file to open for reading.</param>
public Mp3Tag(string filename)
{
this._filename = filename;
_id3v2 = new ID3V2(filename);
}
