input_type_delta.h

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/*
 * Copyright (c) 2017 The University of Manchester
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef _INPUT_TYPE_DELTA_H_
#define _INPUT_TYPE_DELTA_H_
 
#include "input_type.h"
 
struct input_type_params_t {
    // Time step in milliseconds
    REAL time_step;
};
 
struct input_type_t {
    // scale factor (1.0 / timestep)
    REAL scale_factor;
};
 
static inline void input_type_initialise(input_type_t *state, input_type_params_t *params,
        uint32_t n_steps_per_time_step) {
    state->scale_factor = kdivk(1.0, kdivui(params->time_step, n_steps_per_time_step));
}
 
static inline void input_type_save_state(UNUSED input_type_t *state,
        UNUSED input_type_params_t *params) {
}
 
static inline input_t *input_type_get_input_value(
        input_t *restrict value, UNUSED input_type_t *input_type,
        UNUSED uint16_t num_receptors) {
    return value;
}
 
static inline void input_type_convert_excitatory_input_to_current(
        input_t *restrict exc_input, const input_type_t *input_type,
        UNUSED state_t membrane_voltage) {
    for (int i=0; i < NUM_EXCITATORY_RECEPTORS; i++) {
        exc_input[i] = exc_input[i] * input_type->scale_factor;
    }
}
 
static inline void input_type_convert_inhibitory_input_to_current(
        input_t *restrict inh_input, const input_type_t *input_type,
        UNUSED state_t membrane_voltage) {
    for (int i=0; i < NUM_INHIBITORY_RECEPTORS; i++) {
        inh_input[i] = inh_input[i] * input_type->scale_factor;
    }
}
 
#endif // _INPUT_TYPE_DELTA_H_