public Decode(Data_Frame_Header_Info _frameHeaderInfo, byte[] _frameData, Stream _input, string _filename, WriteToFile write)
{
frameHeaderInfo = _frameHeaderInfo;
frame_data = _frameData;
input = _input;
filename = _filename;
_write = write;
}
/// <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);
}
public Get_side_info(byte[] _data, Data_Frame_Header_Info _dataFrameHeaderInfo)
{
data = _data;
this._dataFrameHeaderInfo = _dataFrameHeaderInfo;
}