portapack-mayhem/firmware/application/metadata_file.cpp
Totoo 9e40e38f07
Record gps lat, lon, satinuse from recorder app if there was gps signal. (#1992)
* Record gps lat, lon, satinuse from recorder app if there was gps signal.

* Add _GEO to filename that has geotag
2024-03-15 21:56:20 +08:00

129 lines
4.0 KiB
C++

/*
* Copyright (C) 2023 Kyle Reed
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "metadata_file.hpp"
#include "convert.hpp"
#include "file_reader.hpp"
#include "string_format.hpp"
#include <string_view>
namespace fs = std::filesystem;
using namespace std::literals;
const std::string_view center_freq_name = "center_frequency"sv;
const std::string_view sample_rate_name = "sample_rate"sv;
const std::string_view latitude_name = "latitude"sv;
const std::string_view longitude_name = "longitude"sv;
const std::string_view satinuse_name = "satinuse"sv;
fs::path get_metadata_path(const fs::path& capture_path) {
auto temp = capture_path;
return temp.replace_extension(u".TXT");
}
Optional<File::Error> write_metadata_file(const fs::path& path, capture_metadata metadata) {
File f;
auto error = f.create(path);
if (error)
return error;
error = f.write_line(std::string{center_freq_name} + "=" +
to_string_dec_uint(metadata.center_frequency));
if (error)
return error;
error = f.write_line(std::string{sample_rate_name} + "=" +
to_string_dec_uint(metadata.sample_rate));
if (error)
return error;
// add gps data if available
if (metadata.latitude != 0 && metadata.longitude != 0 && metadata.latitude < 200 && metadata.longitude < 200) {
error = f.write_line(std::string{latitude_name} + "=" +
to_string_decimal(metadata.latitude, 7));
if (error)
return error;
error = f.write_line(std::string{longitude_name} + "=" +
to_string_decimal(metadata.longitude, 7));
if (error)
return error;
error = f.write_line(std::string{satinuse_name} + "=" +
to_string_dec_uint(metadata.satinuse));
if (error)
return error;
}
return {};
}
Optional<capture_metadata> read_metadata_file(const fs::path& path) {
File f;
auto error = f.open(path);
if (error)
return {};
capture_metadata metadata{};
auto reader = FileLineReader(f);
for (const auto& line : reader) {
auto cols = split_string(line, '=');
if (cols.size() != 2)
continue; // Bad line.
if (cols[0] == center_freq_name)
parse_int(cols[1], metadata.center_frequency);
else if (cols[0] == sample_rate_name)
parse_int(cols[1], metadata.sample_rate);
else if (cols[0] == latitude_name)
parse_float_meta(cols[1], metadata.latitude);
else if (cols[0] == longitude_name)
parse_float_meta(cols[1], metadata.longitude);
else if (cols[0] == satinuse_name)
parse_int(cols[1], metadata.satinuse);
else
continue;
}
if (metadata.center_frequency == 0 || metadata.sample_rate == 0)
return {}; // Parse failed.
return metadata;
}
bool parse_float_meta(std::string_view str, float& out_val) {
out_val = {};
if (str.size() > max_parse_int_length)
return false;
// Copy onto the stack and null terminate.
char zstr[max_parse_int_length + 1];
std::memcpy(zstr, str.data(), str.size());
zstr[str.size()] = '\0';
errno = 0;
out_val = strtod(zstr, nullptr);
return (errno == 0);
}