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/*
* Copyright (C) 2011-2015 Karlsruhe Institute of Technology
*
* This file is part of Ufo.
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "common/hdf5.h"
#include "readers/ufo-reader.h"
#include "readers/ufo-hdf5-reader.h"
struct _UfoHdf5ReaderPrivate {
hid_t file_id;
hid_t dataset_id;
hid_t src_dataspace_id;
gint n_dims;
hsize_t dims[3];
guint current;
};
static void ufo_reader_interface_init (UfoReaderIface *iface);
G_DEFINE_TYPE_WITH_CODE (UfoHdf5Reader, ufo_hdf5_reader, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (UFO_TYPE_READER,
ufo_reader_interface_init))
#define UFO_HDF5_READER_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE((obj), UFO_TYPE_HDF5_READER, UfoHdf5ReaderPrivate))
UfoHdf5Reader *
ufo_hdf5_reader_new (void)
{
return g_object_new (UFO_TYPE_HDF5_READER, NULL);
}
static gboolean
ufo_hdf5_reader_can_open (UfoReader *reader,
const gchar *filename)
{
return ufo_hdf5_can_open (filename);
}
static gboolean
ufo_hdf5_reader_open (UfoReader *reader,
const gchar *filename,
guint start,
GError **error)
{
UfoHdf5ReaderPrivate *priv;
gchar *h5_filename;
gchar *h5_dataset;
gchar **components;
priv = UFO_HDF5_READER_GET_PRIVATE (reader);
components = g_strsplit (filename, ":", 2);
if (components[1] == NULL) {
g_set_error_literal (error, UFO_TASK_ERROR, UFO_TASK_ERROR_SETUP,
"hdf5: must specify dataset name after colon");
return FALSE;
}
h5_filename = components[0];
h5_dataset = components[1];
priv->file_id = H5Fopen (h5_filename, H5F_ACC_RDWR, H5P_DEFAULT);
priv->dataset_id = H5Dopen (priv->file_id, h5_dataset, H5P_DEFAULT);
priv->src_dataspace_id = H5Dget_space (priv->dataset_id);
priv->n_dims = H5Sget_simple_extent_ndims (priv->src_dataspace_id);
if (priv->n_dims > 3) {
g_set_error_literal (error, UFO_TASK_ERROR, UFO_TASK_ERROR_SETUP,
"hdf5: no support for four-dimensional data");
return FALSE;
}
H5Sget_simple_extent_dims (priv->src_dataspace_id, priv->dims, NULL);
priv->current = start;
g_strfreev (components);
return TRUE;
}
static void
ufo_hdf5_reader_close (UfoReader *reader)
{
UfoHdf5ReaderPrivate *priv;
priv = UFO_HDF5_READER_GET_PRIVATE (reader);
H5Sclose (priv->src_dataspace_id);
H5Dclose (priv->dataset_id);
H5Fclose (priv->file_id);
}
static gboolean
ufo_hdf5_reader_data_available (UfoReader *reader)
{
UfoHdf5ReaderPrivate *priv;
priv = UFO_HDF5_READER_GET_PRIVATE (reader);
return priv->current < priv->dims[0];
}
static gsize
ufo_hdf5_reader_read (UfoReader *reader,
UfoBuffer *buffer,
UfoRequisition *requisition,
guint roi_y,
guint roi_height,
guint roi_step,
guint image_step)
{
UfoHdf5ReaderPrivate *priv;
gpointer data;
hid_t dst_dataspace_id;
hsize_t dst_dims[2];
gsize num_read = 0;
priv = UFO_HDF5_READER_GET_PRIVATE (reader);
data = ufo_buffer_get_host_array (buffer, NULL);
hsize_t offset[3] = { priv->current, roi_y, 0 };
hsize_t count[3] = { 1, roi_height, requisition->dims[0] };
dst_dims[0] = roi_height;
dst_dims[1] = requisition->dims[0];
dst_dataspace_id = H5Screate_simple (2, dst_dims, NULL);
H5Sselect_hyperslab (priv->src_dataspace_id, H5S_SELECT_SET, offset, NULL, count, NULL);
H5Dread (priv->dataset_id, H5T_NATIVE_FLOAT, dst_dataspace_id, priv->src_dataspace_id, H5P_DEFAULT, data);
H5Sclose (dst_dataspace_id);
num_read = MIN (image_step, priv->dims[0] - priv->current);
priv->current += num_read;
return num_read;
}
static gboolean
ufo_hdf5_reader_get_meta (UfoReader *reader,
UfoRequisition *requisition,
gsize *num_images,
UfoBufferDepth *bitdepth,
GError **error)
{
UfoHdf5ReaderPrivate *priv;
priv = UFO_HDF5_READER_GET_PRIVATE (reader);
requisition->n_dims = 2;
requisition->dims[0] = priv->dims[2];
requisition->dims[1] = priv->dims[1];
*num_images = priv->dims[0];
*bitdepth = UFO_BUFFER_DEPTH_32F;
return TRUE;
}
static void
ufo_reader_interface_init (UfoReaderIface *iface)
{
iface->can_open = ufo_hdf5_reader_can_open;
iface->open = ufo_hdf5_reader_open;
iface->close = ufo_hdf5_reader_close;
iface->read = ufo_hdf5_reader_read;
iface->get_meta = ufo_hdf5_reader_get_meta;
iface->data_available = ufo_hdf5_reader_data_available;
}
static void
ufo_hdf5_reader_class_init(UfoHdf5ReaderClass *klass)
{
g_type_class_add_private (G_OBJECT_CLASS (klass), sizeof (UfoHdf5ReaderPrivate));
}
static void
ufo_hdf5_reader_init (UfoHdf5Reader *self)
{
self->priv = UFO_HDF5_READER_GET_PRIVATE (self);
}
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