portapack-mayhem/firmware/application/io_wave.hpp
2016-10-04 10:12:10 -07:00

105 lines
2.4 KiB
C++

/*
* Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
*
* 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.
*/
#pragma once
#include "io_file.hpp"
#include "file.hpp"
#include "optional.hpp"
#include <cstddef>
#include <cstdint>
struct fmt_pcm_t {
constexpr fmt_pcm_t(
const uint32_t sampling_rate
) : nSamplesPerSec { sampling_rate },
nAvgBytesPerSec { nSamplesPerSec * nBlockAlign }
{
}
private:
uint8_t ckID[4] { 'f', 'm', 't', ' ' };
uint32_t cksize { 16 };
uint16_t wFormatTag { 0x0001 };
uint16_t nChannels { 1 };
uint32_t nSamplesPerSec;
uint32_t nAvgBytesPerSec;
uint16_t nBlockAlign { 2 };
uint16_t wBitsPerSample { 16 };
};
struct data_t {
constexpr data_t(
const uint32_t size
) : cksize { size }
{
}
private:
uint8_t ckID[4] { 'd', 'a', 't', 'a' };
uint32_t cksize { 0 };
};
struct header_t {
constexpr header_t(
const uint32_t sampling_rate,
const uint32_t data_chunk_size
) : cksize { sizeof(header_t) + data_chunk_size - 8 },
fmt { sampling_rate },
data { data_chunk_size }
{
}
private:
uint8_t riff_id[4] { 'R', 'I', 'F', 'F' };
uint32_t cksize { 0 };
uint8_t wave_id[4] { 'W', 'A', 'V', 'E' };
fmt_pcm_t fmt;
data_t data;
};
class WAVFileWriter : public FileWriter {
public:
WAVFileWriter() = default;
WAVFileWriter(const WAVFileWriter&) = delete;
WAVFileWriter& operator=(const WAVFileWriter&) = delete;
WAVFileWriter(WAVFileWriter&&) = delete;
WAVFileWriter& operator=(WAVFileWriter&&) = delete;
~WAVFileWriter() {
update_header();
}
Optional<File::Error> create(
const std::filesystem::path& filename,
size_t sampling_rate
);
private:
uint32_t sampling_rate;
uint32_t bytes_written;
Optional<File::Error> update_header();
};