mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-10-01 01:26:06 -04:00
123 lines
3.0 KiB
C++
123 lines
3.0 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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#include "capture_thread.hpp"
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#include "portapack_shared_memory.hpp"
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// StreamOutput ///////////////////////////////////////////////////////////
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class StreamOutput {
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public:
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StreamOutput(CaptureConfig* const config);
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~StreamOutput();
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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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static FIFO<uint8_t>* fifo;
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private:
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CaptureConfig* const config;
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};
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FIFO<uint8_t>* StreamOutput::fifo = nullptr;
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StreamOutput::StreamOutput(
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CaptureConfig* const config
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) : config { config }
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{
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shared_memory.baseband_queue.push_and_wait(
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CaptureConfigMessage { config }
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);
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fifo = config->fifo;
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}
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StreamOutput::~StreamOutput() {
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fifo = nullptr;
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shared_memory.baseband_queue.push_and_wait(
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CaptureConfigMessage { nullptr }
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);
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}
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// CaptureThread //////////////////////////////////////////////////////////
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Thread* CaptureThread::thread = nullptr;
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CaptureThread::CaptureThread(
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std::unique_ptr<Writer> writer,
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size_t write_size_log2,
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size_t buffer_count_log2
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) : config { write_size_log2, buffer_count_log2 },
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writer { std::move(writer) }
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{
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// Need significant stack for FATFS
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thread = chThdCreateFromHeap(NULL, 1024, NORMALPRIO + 10, CaptureThread::static_fn, this);
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}
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CaptureThread::~CaptureThread() {
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if( thread ) {
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chThdTerminate(thread);
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chEvtSignal(thread, EVT_MASK_CAPTURE_THREAD);
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chThdWait(thread);
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thread = nullptr;
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}
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}
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void CaptureThread::check_fifo_isr() {
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// TODO: Prevent over-signalling by transmitting a set of
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// flags from the baseband core.
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const auto fifo = StreamOutput::fifo;
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if( fifo ) {
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chEvtSignalI(thread, EVT_MASK_CAPTURE_THREAD);
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}
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}
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msg_t CaptureThread::run() {
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const size_t write_size = 1U << config.write_size_log2;
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const auto write_buffer = std::make_unique<uint8_t[]>(write_size);
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if( !write_buffer ) {
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return false;
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}
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StreamOutput stream { &config };
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while( !chThdShouldTerminate() ) {
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if( stream.available() >= write_size ) {
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if( stream.read(write_buffer.get(), write_size) != write_size ) {
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return false;
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}
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if( !writer->write(write_buffer.get(), write_size) ) {
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return false;
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}
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} else {
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chEvtWaitAny(EVT_MASK_CAPTURE_THREAD);
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}
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}
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return true;
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}
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