def get_info():
"""Extract information from Siemens binary physiological data file: get information from global memory structure. """
descriptor = [
{
'name': 'n_samples_breathing',
'type': 'uint',
'value': None
},
{
'name': 'n_samples_ecg_I',
'type': 'uint',
'value': None
},
{
'name': 'n_samples_ecg_aVF',
'type': 'uint',
'value': None
},
{
'name': 'n_samples_pulse_ox',
'type': 'uint',
'value': None
},
{
'name': 'n_samples_external',
'type': 'uint',
'value': None
},
]
r = call_c_function(physiological_c.get_info, descriptor)
if not r.status == status_success():
raise ErrorInCFunction("The execution of get_info was unsuccesful.",
r.status, 'get_info')
return r.dictionary
def status_unhandled_error():
"""Returns the value returned by the function calls to the library in case of unhandled error. """
r = call_c_function(physiological_c.status_unhandled_error, [{
'name': 'return_value',
'type': 'int',
'value': None
}])
return r.return_value
def status_decode_error():
"""Returns the value returned by the function calls to the library in case of error decoding a file. """
r = call_c_function(physiological_c.status_decode_error, [{
'name': 'return_value',
'type': 'int',
'value': None
}])
return r.return_value
def status_success():
"""Returns the value returned by the function calls to the library in case of success. """
r = call_c_function(physiological_c.status_success, [{
'name': 'return_value',
'type': 'int',
'value': None
}])
return r.return_value
def load_data(filename):
"""Extract information from Siemens binary physiological data file: load data to global memory structure """
descriptor = [
{
'name': 'filename',
'type': 'string',
'value': filename,
'size': len(filename)
},
]
r = call_c_function(physiological_c.load_data, descriptor)
if not r.status == status_success():
raise ErrorInCFunction("The execution of load_data was unsuccesful.",
r.status, 'load_data')
return r.dictionary
def test_library():
"""Test whether the C library responds. Used in the package testing. """
number = 134 # a (lucky) number
descriptor = [
{
'name': 'input',
'type': 'int',
'value': number
},
{
'name': 'output',
'type': 'int',
'value': None
},
]
r = call_c_function(physiological_c.echo, descriptor)
return r.output == number
def get_data(n_samples_breathing, n_samples_ecg_I, n_samples_ecg_aVF,
n_samples_pulse_ox, n_samples_external):
"""Extract information from Siemens binary physiological data file: get data from global memory strucutre. """
descriptor = [
{
'name': 'n_samples_breathing',
'type': 'uint',
'value': n_samples_breathing
},
{
'name': 'n_samples_ecg_I',
'type': 'uint',
'value': n_samples_ecg_I
},
{
'name': 'n_samples_ecg_aVF',
'type': 'uint',
'value': n_samples_ecg_aVF
},
{
'name': 'n_samples_pulse_ox',
'type': 'uint',
'value': n_samples_pulse_ox
},
{
'name': 'n_samples_external',
'type': 'uint',
'value': n_samples_external
},
{
'name': 'samples_breathing',
'type': 'array',
'value': None,
'dtype': uint16,
'size': (n_samples_breathing)
},
{
'name': 'samples_ecg_I',
'type': 'array',
'value': None,
'dtype': uint16,
'size': (n_samples_ecg_I)
},
{
'name': 'samples_ecg_aVF',
'type': 'array',
'value': None,
'dtype': uint16,
'size': (n_samples_ecg_aVF)
},
{
'name': 'samples_pulse_ox',
'type': 'array',
'value': None,
'dtype': uint16,
'size': (n_samples_pulse_ox)
},
{
'name': 'samples_external',
'type': 'array',
'value': None,
'dtype': uint16,
'size': (n_samples_external)
},
{
'name': 'triggers_breathing',
'type': 'array',
'value': None,
'dtype': uint16,
'size': (n_samples_breathing)
},
{
'name': 'triggers_ecg_I',
'type': 'array',
'value': None,
'dtype': uint16,
'size': (n_samples_ecg_I)
},
{
'name': 'triggers_ecg_aVF',
'type': 'array',
'value': None,
'dtype': uint16,
'size': (n_samples_ecg_aVF)
},
{
'name': 'triggers_pulse_ox',
'type': 'array',
'value': None,
'dtype': uint16,
'size': (n_samples_pulse_ox)
},
{
'name': 'triggers_external',
'type': 'array',
'value': None,
'dtype': uint16,
'size': (n_samples_external)
},
]
r = call_c_function(physiological_c.get_data, descriptor)
if not r.status == status_success():
raise ErrorInCFunction("The execution of get_data was unsuccesful.",
r.status, 'get_data')
return r.dictionary
