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Custom base for decoding ADC data (#163)

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New function apply_custom_weights (can we find a better name) that takes
a uint16 and a NDView<double,1> of bases for the conversion. For each
supplied weight it is used as base (instead of 2) to convert from bits
to a double.

---------

Co-authored-by: siebsi <sieb.patr@gmail.com>
This commit is contained in:
Erik Fröjdh
2025-04-22 15:20:46 +02:00
committed by GitHub
parent 84aafa75f6
commit 326941e2b4
8 changed files with 204 additions and 27 deletions
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43
src/decode.cpp
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@@ -1,5 +1,5 @@
#include "aare/decode.hpp"
#include <cmath>
namespace aare {
uint16_t adc_sar_05_decode64to16(uint64_t input){
@@ -22,6 +22,10 @@ uint16_t adc_sar_05_decode64to16(uint64_t input){
}
void adc_sar_05_decode64to16(NDView<uint64_t, 2> input, NDView<uint16_t,2> output){
if(input.shape() != output.shape()){
throw std::invalid_argument(LOCATION + " input and output shapes must match");
}
for(int64_t i = 0; i < input.shape(0); i++){
for(int64_t j = 0; j < input.shape(1); j++){
output(i,j) = adc_sar_05_decode64to16(input(i,j));
@@ -49,6 +53,9 @@ uint16_t adc_sar_04_decode64to16(uint64_t input){
}
void adc_sar_04_decode64to16(NDView<uint64_t, 2> input, NDView<uint16_t,2> output){
if(input.shape() != output.shape()){
throw std::invalid_argument(LOCATION + " input and output shapes must match");
}
for(int64_t i = 0; i < input.shape(0); i++){
for(int64_t j = 0; j < input.shape(1); j++){
output(i,j) = adc_sar_04_decode64to16(input(i,j));
@@ -56,6 +63,40 @@ void adc_sar_04_decode64to16(NDView<uint64_t, 2> input, NDView<uint16_t,2> outpu
}
}
double apply_custom_weights(uint16_t input, const NDView<double, 1> weights) {
if(weights.size() > 16){
throw std::invalid_argument("weights size must be less than or equal to 16");
}
double result = 0.0;
for (ssize_t i = 0; i < weights.size(); ++i) {
result += ((input >> i) & 1) * std::pow(weights[i], i);
}
return result;
}
void apply_custom_weights(NDView<uint16_t, 1> input, NDView<double, 1> output, const NDView<double,1> weights) {
if(input.shape() != output.shape()){
throw std::invalid_argument(LOCATION + " input and output shapes must match");
}
//Calculate weights to avoid repeatedly calling std::pow
std::vector<double> weights_powers(weights.size());
for (ssize_t i = 0; i < weights.size(); ++i) {
weights_powers[i] = std::pow(weights[i], i);
}
// Apply custom weights to each element in the input array
for (ssize_t i = 0; i < input.shape(0); i++) {
double result = 0.0;
for (size_t bit_index = 0; bit_index < weights_powers.size(); ++bit_index) {
result += ((input(i) >> bit_index) & 1) * weights_powers[bit_index];
}
output(i) = result;
}
}
} // namespace aare