mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-12-25 15:29:37 -05:00
146 lines
3.3 KiB
C++
146 lines
3.3 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 __AUDIO_THREAD_H__
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#define __AUDIO_THREAD_H__
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#include "ch.h"
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#include "file.hpp"
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#include "event_m0.hpp"
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#include "portapack_shared_memory.hpp"
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#include "hackrf_gpio.hpp"
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using namespace hackrf::one;
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#include <cstring>
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class StreamOutput {
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public:
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StreamOutput(
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FIFO<uint8_t>* const fifo
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) : fifo { fifo }
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{
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}
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size_t available() {
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return fifo->len();
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}
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size_t read(void* const data, const size_t length) {
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return fifo->out(reinterpret_cast<uint8_t*>(data), length);
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}
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private:
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FIFO<uint8_t>* const fifo;
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};
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class AudioThread {
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public:
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AudioThread(
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std::string file_path
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) : file_path { std::move(file_path) },
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write_buffer { std::make_unique<std::array<uint8_t, write_size>>() }
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{
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// Need significant stack for FATFS
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thread = chThdCreateFromHeap(NULL, 1024, NORMALPRIO + 10, AudioThread::static_fn, this);
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}
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~AudioThread() {
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chThdTerminate(thread);
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chEvtSignal(thread, EVT_FIFO_HIGHWATER);
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const auto success = chThdWait(thread);
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if( !success ) {
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led_tx.on();
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}
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}
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static void check_fifo_isr() {
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if( (shared_memory.FIFO_HACK != nullptr) && (thread != nullptr) ) {
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auto fifo = reinterpret_cast<FIFO<uint8_t>*>(shared_memory.FIFO_HACK);
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if( fifo->len() >= write_size ) {
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chEvtSignalI(thread, EVT_FIFO_HIGHWATER);
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}
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}
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}
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private:
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static constexpr size_t write_size = 4096;
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static constexpr eventmask_t EVT_FIFO_HIGHWATER = 1;
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const std::string file_path;
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std::unique_ptr<std::array<uint8_t, write_size>> write_buffer;
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File file;
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static Thread* thread;
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static msg_t static_fn(void* arg) {
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auto obj = static_cast<AudioThread*>(arg);
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return obj->run();
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}
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msg_t run() {
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if( !file.open_for_append(file_path) ) {
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return false;
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}
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auto fifo = reinterpret_cast<FIFO<uint8_t>*>(shared_memory.FIFO_HACK);
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if( !fifo ) {
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return false;
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}
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StreamOutput stream { fifo };
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while( !chThdShouldTerminate() ) {
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chEvtWaitAny(EVT_FIFO_HIGHWATER);
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while( stream.available() >= write_buffer->size() ) {
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if( !transfer(stream, write_buffer.get()) ) {
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return false;
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}
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}
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}
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return true;
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}
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bool transfer(StreamOutput& stream, std::array<uint8_t, write_size>* const write_buffer) {
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bool success = false;
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led_usb.on();
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const auto bytes_to_write = stream.read(write_buffer->data(), write_buffer->size());
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if( bytes_to_write == write_buffer->size() ) {
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if( file.write(write_buffer->data(), write_buffer->size()) ) {
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success = true;
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}
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}
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led_usb.off();
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return success;
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}
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};
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#endif/*__AUDIO_THREAD_H__*/
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