portapack-mayhem/firmware/common/buffer_exchange.cpp
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/*
* 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.
*/
#include "buffer_exchange.hpp"
BufferExchange* BufferExchange::obj{nullptr};
BufferExchange::BufferExchange(
CaptureConfig* const config) // : config_capture { config }
{
obj = this;
// In capture mode, baseband wants empty buffers, app waits for full buffers
fifo_buffers_for_baseband = config->fifo_buffers_empty;
fifo_buffers_for_application = config->fifo_buffers_full;
}
BufferExchange::BufferExchange(
ReplayConfig* const config) // : config_replay { config }
{
obj = this;
// In replay mode, baseband wants full buffers, app waits for empty buffers
fifo_buffers_for_baseband = config->fifo_buffers_full;
fifo_buffers_for_application = config->fifo_buffers_empty;
}
BufferExchange::~BufferExchange() {
obj = nullptr;
fifo_buffers_for_baseband = nullptr;
fifo_buffers_for_application = nullptr;
}
StreamBuffer* BufferExchange::get(FIFO<StreamBuffer*>* fifo) {
while (true) {
StreamBuffer* p{nullptr};
fifo->out(p);
if (p) {
return p;
}
// Put thread to sleep, woken up by M4 IRQ
chSysLock();
thread = chThdSelf();
chSchGoSleepS(THD_STATE_SUSPENDED);
chSysUnlock();
}
}
StreamBuffer* BufferExchange::get_prefill(FIFO<StreamBuffer*>* fifo) {
StreamBuffer* p{nullptr};
fifo->out(p);
return p;
}