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/*
* Copyright (C) 2015, 2016 "IoT.bzh"
* Author "Romain Forlot" <romain.forlot@iot.bzh>
*
* 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
*
* http://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.
*/
Decoder::Decoder
{
decoded_value = { .has_type = false,
.has_numeric_value = false,
.has_boolean_value = false,
.has_string_value = false };
}
float Decoder::parseSignalBitfield(CanSignal* signal, const CanMessage* message)
{
return bitfield_parse_float(message->data, CAN_MESSAGE_SIZE,
signal->bitPosition, signal->bitSize, signal->factor,
signal->offset);
}
openxc_DynamicField Decoder::noopDecoder(CanSignal* signal,
CanSignal* signals, int signalCount, float value, bool* send)
{
decoded_value = { .has_type = true,
.type = openxc_DynamicField_Type_NUM,
.has_numeric_value = true,
.numeric_value = value };
return decoded_value;
}
openxc_DynamicField Decoder::booleanDecoder(CanSignal* signal,
CanSignal* signals, int signalCount, float value, bool* send)
{
decoded_value = { .has_type = true,
.type = openxc_DynamicField_Type_BOOL,
.has_boolean_value = true,
.numeric_value = value == 0.0 ? false : true };
return decoded_value;
}
openxc_DynamicField Decoder::ignoreDecoder(CanSignal* signal,
CanSignal* signals, int signalCount, float value, bool* send)
{
*send = false;
openxc_DynamicField decoded_value = {0};
return decoded_value;
}
openxc_DynamicField Decoder::stateDecoder(CanSignal* signal,
CanSignal* signals, int signalCount, float value, bool* send)
{
openxc_DynamicField decoded_value = {0};
decoded_value.has_type = true;
decoded_value.type = openxc_DynamicField_Type_STRING;
decoded_value.has_string_value = true;
const CanSignalState* signalState = lookupSignalState(value, signal);
if(signalState != NULL) {
strcpy(decoded_value.string_value, signalState->name);
} else {
*send = false;
}
return decoded_value;
}
openxc_DynamicField Decoder::decodeSignal(CanSignal* signal,
float value, CanSignal* signals, int signalCount, bool* send)
{
SignalDecoder decoder = signal->decoder == NULL ?
noopDecoder : signal->decoder;
openxc_DynamicField decoded_value = decoder(signal, signals,
signalCount, value, send);
return decoded_value;
}
openxc_DynamicField Decoder::decodeSignal(CanSignal* signal,
const CanMessage* message, CanSignal* signals, int signalCount,
bool* send) {
float value = parseSignalBitfield(signal, message);
return decodeSignal(signal, value, signals, signalCount, send);
}
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