private void button1_Click(object sender, EventArgs e)
{
var fname = "hdf4.hdf";
var hdf = new H4File(null, null, null, new long[] { 0, 0 });
hdf.Load(fname);
H4SDS[] sds = hdf.Datasets;
//测试读取的科学数据集及其属性
for (int i = 0; i < hdf.Num_Datasets; i++)
{
H4SDS sd = hdf.Datasets[i];
HDFAttribute[] attrs = sd.SDAttributes;
if (sd.Rank == 2)
{
int buffersize = (int)sd.Dimsizes[0] * sd.Dimsizes[1];
int typesize = HDFDataType.GetSize(sd.Datatype);
IntPtr ptr = Marshal.AllocHGlobal(buffersize * typesize);
sd.Read(new int[] { 0, 0 }, null, sd.Dimsizes, ptr);
short[] buffer = new short[buffersize];
Marshal.Copy(ptr, buffer, 0, buffersize);
Marshal.FreeHGlobal(ptr);
}
}
//byte[] head1024 = GetHeader1024Bytes(fname);
//object args = null;
//var hdf4Driver = new HDF4Driver();
//hdf4Driver.Open(fname, head1024, enumDataProviderAccess.ReadOnly, null);
//var prd = new Hdf4RasterDataProvider(fname, head1024, hdf4Driver, args);
//List<IRasterBand> _rasterBands = new List<IRasterBand>();
//for (int i = 0; i < sds.Length; i++)
//{
// CloudSatRasterBand rasterBand = new CloudSatRasterBand(prd, sds[i], i + 1);
// _rasterBands.Add(rasterBand);
// break;
//}
}
private void ConvertHdf4To5(string f4name, string f5name, Action <string> messageAction)
{
var hdf = new H4File(null, null, null, new long[] { 0, 0 });
hdf.Load(f4name);
H4SDS[] sds = hdf.Datasets;
// Create a new file using H5F_ACC_TRUNC access,
// default file creation properties, and default file
// access properties.
H5FileId fileId = H5F.create(f5name, H5F.CreateMode.ACC_TRUNC);
//测试读取的科学数据集及其属性
//for (int k = 0; k < hdf.Num_Datasets; k++)
for (int k = 0; k < 1; k++)
{
H4SDS sd = hdf.Datasets[k];
HDFAttribute[] attrs = sd.SDAttributes;
string sdName = sd.Name;
int rank = sd.Rank;
if (messageAction != null)
{
messageAction(string.Format("正在转换数据集 {0}", sdName));
}
if (rank == 2)
{
int nx = sd.Dimsizes[0];
int ny = sd.Dimsizes[1];
int buffersize = nx * ny;
int typesize = HDFDataType.GetSize(sd.Datatype);
IntPtr ptr = Marshal.AllocHGlobal(buffersize * typesize);
sd.Read(new int[] { 0, 0 }, null, sd.Dimsizes, ptr);
short[] buffer = new short[buffersize];
Marshal.Copy(ptr, buffer, 0, buffersize);
Marshal.FreeHGlobal(ptr);
// Data and input buffer initialization.
int[,] data = new int[nx, ny];
for (int i = 0; i < nx; i++)
{
for (int j = 0; j < ny; j++)
{
int index = i * ny + j;
data[i, j] = buffer[index];
}
}
// Describe the size of the array and create the data space for fixed
// size dataset.
long[] dims = new long[rank];
dims[0] = Convert.ToInt64(nx);
dims[1] = Convert.ToInt64(ny);
H5DataSpaceId dspaceId = H5S.create_simple(rank, dims);
// Define datatype for the data in the file.
H5DataTypeId dtypeId = H5T.copy(H5T.H5Type.NATIVE_INT);
// Create the data set DATASETNAME.
H5DataSetId dsetId = H5D.create(fileId, sdName, dtypeId, dspaceId);
// Write the one-dimensional data set array
H5D.write(dsetId, new H5DataTypeId(H5T.H5Type.NATIVE_INT), new H5Array <int>(data));
// Close dataset and file.
H5D.close(dsetId);
H5F.close(fileId);
}
}
}