mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-14 12:08:40 +00:00
74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
/*
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* Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
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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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#ifndef __STREAM_INPUT_H__
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#define __STREAM_INPUT_H__
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#include "portapack_shared_memory.hpp"
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#include "fifo.hpp"
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#include <cstdint>
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#include <cstddef>
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#include <memory>
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class StreamInput {
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public:
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StreamInput(const size_t K) :
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K { K },
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data { std::make_unique<uint8_t[]>(1UL << K) },
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fifo { data.get(), K }
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{
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// TODO: Send stream creation message.
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shared_memory.FIFO_HACK = &fifo;
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}
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~StreamInput() {
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// TODO: Send stream distruction message.
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shared_memory.FIFO_HACK = nullptr;
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}
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size_t write(const void* const data, const size_t length) {
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const auto written = fifo.in(reinterpret_cast<const uint8_t*>(data), length);
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const auto last_bytes_written = bytes_written;
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bytes_written += written;
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if( (bytes_written & event_bytes_mask) < (last_bytes_written & event_bytes_mask) ) {
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creg::m4txevent::assert();
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}
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return written;
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}
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uint64_t written() const {
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return bytes_written;
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}
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private:
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const size_t K;
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const uint64_t event_bytes_mask = (1ULL << (K - 2)) - 1;
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uint64_t bytes_written = 0;
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std::unique_ptr<uint8_t[]> data;
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FIFO<uint8_t> fifo;
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};
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#endif/*__STREAM_INPUT_H__*/
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