/// <summary>
/// 创建 HDF5 文件，并设置可以在采集开始的时候设置的 Attribute
/// <param name="dataFilePath">HDF5 文件完整路径</param>
/// <param name="sampleRate">采样率</param>
/// <param name="channelCount">通道总数</param>
/// <param name="startTime">采集开始时间</param>
/// /// </summary>
public DataFileConfig(string dataFilePath, double sampleRate, int channelCount, double startTime)
{
//这个地方，之前的 BinData 不会有问题，因为只是创建了流，流写入文件是最后做的
//而这里一开始就创建了文件，所以如果没有正常写完并调用 SetAndClose 方法，就会有文件打开而没有关闭的风险
try
{
//创建文件
myHDF5File = new HDF5File(dataFilePath);
myHDF5Group = myHDF5File.CreateGroup("Attribute");
//设置 Attribute
myHDF5Group.SetAttribute("StartTime", HDF5AttributeTypes.DOUBLE, startTime);
myHDF5Group.SetAttribute("SampleRate", HDF5AttributeTypes.DOUBLE, sampleRate);
myHDF5Group.SetAttribute("ChannelCount", HDF5AttributeTypes.DOUBLE, channelCount);
myHDF5Group.SetAttribute("CreateTime", HDF5AttributeTypes.DOUBLE, Convert.ToDouble(DateTime.Now.ToLocalTime().ToString("yyyyMMddHHmmss")));
//设置相应个数的 Dataset
myHDF5Datasets = new HDF5Dataset[channelCount];
for (int i = 0; i < channelCount; i++)
{
myHDF5Datasets[i] = new HDF5Dataset();
myHDF5Datasets[i] = myHDF5File.CreateChunkDataset("channel" + i.ToString(), HDF5DataTypes.DOUBLE, new ulong[] { 1000 });
}
}
catch (Exception e)
{
throw new Exception("Create HDF5 file Failed! Error message: " + e);
}
}
/// <summary>
/// 依照 BinData 签名的构造函数
/// </summary>
/// <param name="dataFileDirectory">HDF5 文件所在文件夹</param>
/// <param name="name">HDF5 文件名不带后缀</param>
public DataReader(string dataFileDirectory, string name)
{
this.name = name;
this.dataFilePath = dataFileDirectory + name + ".hdf5";
myH5File = new HDF5File();
myH5File.Open(this.dataFilePath);
myH5Group = myH5File.GetGroup("Attribute");
// double 转 object 后，object 不能直接转 int，需要先转 double 再转 int
double d = (double)myH5Group.GetAttribute("ChannelCount");
channelCount = (int)d;
d = (double)myH5Group.GetAttribute("SampleCount");
sampleCount = (int)d;
sampleRate = (double)myH5Group.GetAttribute("SampleRate");
startTime = (double)myH5Group.GetAttribute("StartTime");
createTime = (double)myH5Group.GetAttribute("CreateTime");
myH5Group.Close();
myH5File.Close();
}
