mirror of
https://github.com/eried/portapack-mayhem.git
synced 2025-10-31 11:29:08 -04:00
133 lines
3.4 KiB
C++
133 lines
3.4 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_buffers_full->len();
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}
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StreamBuffer* get_buffer() {
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StreamBuffer* p { nullptr };
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fifo_buffers_full->out(p);
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return p;
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}
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bool release_buffer(StreamBuffer* const p) {
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p->empty();
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return fifo_buffers_empty->in(p);
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}
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static FIFO<StreamBuffer*>* fifo_buffers_empty;
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static FIFO<StreamBuffer*>* fifo_buffers_full;
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private:
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CaptureConfig* const config;
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};
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FIFO<StreamBuffer*>* StreamOutput::fifo_buffers_empty = nullptr;
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FIFO<StreamBuffer*>* StreamOutput::fifo_buffers_full = 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_buffers_empty = config->fifo_buffers_empty;
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fifo_buffers_full = config->fifo_buffers_full;
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}
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StreamOutput::~StreamOutput() {
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fifo_buffers_full = nullptr;
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fifo_buffers_empty = 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,
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size_t buffer_count
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) : config { write_size, buffer_count },
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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, event_mask_loop_wake);
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chThdWait(thread);
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thread = nullptr;
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}
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}
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const Optional<File::Error>& CaptureThread::error() const {
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return last_error;
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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_buffers_full;
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if( fifo ) {
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if( !fifo->is_empty() ) {
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chEvtSignalI(thread, event_mask_loop_wake);
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}
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}
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}
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Optional<File::Error> CaptureThread::run() {
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StreamOutput stream { &config };
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while( !chThdShouldTerminate() ) {
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if( stream.available() ) {
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auto buffer = stream.get_buffer();
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auto write_result = writer->write(buffer->data(), buffer->size());
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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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stream.release_buffer(buffer);
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} else {
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chEvtWaitAny(event_mask_loop_wake);
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}
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}
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return { };
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}
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