mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-14 12:08:40 +00:00
120 lines
3.1 KiB
C++
120 lines
3.1 KiB
C++
/*
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* Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2016 Furrtek
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "io_wave.hpp"
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int WAVFileReader::open(const std::filesystem::path& path) {
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if (path.string() == last_path.string()) {
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rewind();
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return 1; // Already open
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}
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auto error = file.open(path);
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if (!error.is_valid()) {
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file.read((void*)&header, sizeof(header));
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// TODO: Check validity here
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last_path = path;
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data_start = header.fmt.cksize + 28; // Skip "data" and cksize
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data_size_ = header.data.cksize;
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sample_rate_ = header.fmt.nSamplesPerSec;
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bytes_per_sample = header.fmt.wBitsPerSample / 8;
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rewind();
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return 1;
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} else {
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return 0;
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}
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}
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size_t WAVFileReader::read(void * const data, const size_t bytes_to_read) {
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return file.read(data, bytes_to_read).value();
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}
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void WAVFileReader::rewind() {
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file.seek(data_start);
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}
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uint32_t WAVFileReader::ms_duration() {
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return ((data_size_ * 1000) / sample_rate_) / bytes_per_sample;
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}
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int WAVFileReader::seek_mss(const uint16_t minutes, const uint8_t seconds, const uint32_t samples) {
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const auto result = file.seek(data_start + ((((minutes * 60) + seconds) * sample_rate_) + samples) * bytes_per_sample);
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if (result.is_error())
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return 0;
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return 1;
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}
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uint16_t WAVFileReader::channels() {
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return header.fmt.nChannels;
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}
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uint32_t WAVFileReader::sample_rate() {
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return sample_rate_;
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}
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uint32_t WAVFileReader::data_size() {
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return data_size_;
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}
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uint16_t WAVFileReader::bits_per_sample() {
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return header.fmt.wBitsPerSample;
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}
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Optional<File::Error> WAVFileWriter::create(
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const std::filesystem::path& filename,
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size_t sampling_rate_set
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) {
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sampling_rate = sampling_rate_set;
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const auto create_error = FileWriter::create(filename);
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if( create_error.is_valid() ) {
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return create_error;
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} else {
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return update_header();
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}
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}
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Optional<File::Error> WAVFileWriter::update_header() {
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header_t header { sampling_rate, bytes_written };
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const auto seek_0_result = file.seek(0);
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if( seek_0_result.is_error() ) {
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return seek_0_result.error();
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}
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const auto old_position = seek_0_result.value();
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const auto write_result = file.write(&header, sizeof(header));
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if( write_result.is_error() ) {
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return write_result.error();
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}
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const auto seek_old_result = file.seek(old_position);
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if( seek_old_result.is_error() ) {
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return seek_old_result.error();
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}
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return { };
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}
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