tomopy/tomopy

#!/usr/bin/env python
# -*- coding: utf-8 -*-

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"""
Module for external library wrappers.
"""

import tomopy.util.dtype as dtype
from . import c_shared_lib
from . import _missing_library

__author__ = "Doga Gursoy"
__copyright__ = "Copyright (c) 2015, UChicago Argonne, LLC."
__docformat__ = 'restructuredtext en'
__all__ = ['c_accel_mlem',
           'c_accel_sirt']

LIB_TOMOPY_ACCEL = c_shared_lib("tomo-accel", error=False)


def c_accel_mlem(tomo, center, recon, theta, **kwargs):

    if LIB_TOMOPY_ACCEL is None:
        _missing_library("MLEM ACCEL")

    if len(tomo.shape) == 2:
        # no y-axis (only one slice)
        dy = 1
        dt, dx = tomo.shape
    else:
        dy, dt, dx = tomo.shape

    LIB_TOMOPY_ACCEL.cxx_mlem.restype = dtype.as_c_void_p()
    return LIB_TOMOPY_ACCEL.cxx_mlem(
        dtype.as_c_float_p(tomo),
        dtype.as_c_int(dy),
        dtype.as_c_int(dt),
        dtype.as_c_int(dx),
        dtype.as_c_float_p(center),
        dtype.as_c_float_p(theta),
        dtype.as_c_float_p(recon),
        dtype.as_c_int(kwargs['num_gridx']),
        dtype.as_c_int(kwargs['num_gridy']),
        dtype.as_c_int(kwargs['num_iter']),
        dtype.as_c_int(kwargs['pool_size']),
        dtype.as_c_char_p(kwargs['interpolation']),
        dtype.as_c_char_p(kwargs['device']),
        dtype.as_c_int_p(kwargs['grid_size']),
        dtype.as_c_int_p(kwargs['block_size']))


def c_accel_sirt(tomo, center, recon, theta, **kwargs):

    if LIB_TOMOPY_ACCEL is None:
        _missing_library("SIRT ACCEL")

    if len(tomo.shape) == 2:
        # no y-axis (only one slice)
        dy = 1
        dt, dx = tomo.shape
    else:
        dy, dt, dx = tomo.shape

    LIB_TOMOPY_ACCEL.cxx_sirt.restype = dtype.as_c_void_p()
    return LIB_TOMOPY_ACCEL.cxx_sirt(
        dtype.as_c_float_p(tomo),
        dtype.as_c_int(dy),
        dtype.as_c_int(dt),
        dtype.as_c_int(dx),
        dtype.as_c_float_p(center),
        dtype.as_c_float_p(theta),
        dtype.as_c_float_p(recon),
        dtype.as_c_int(kwargs['num_gridx']),
        dtype.as_c_int(kwargs['num_gridy']),
        dtype.as_c_int(kwargs['num_iter']),
        dtype.as_c_int(kwargs['pool_size']),
        dtype.as_c_char_p(kwargs['interpolation']),
        dtype.as_c_char_p(kwargs['device']),
        dtype.as_c_int_p(kwargs['grid_size']),
        dtype.as_c_int_p(kwargs['block_size']))