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/*
* rhmidi
*
* Copyright (C) 2014 Christian Pointner <equinox@helsinki.at>
*
* This file is part of rhmidi.
*
* rhmidi 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 3 of the License, or
* any later version.
*
* rhmidi 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 rhmidi. If not, see <http://www.gnu.org/licenses/>.
*/
#include <LUFA/Drivers/Misc/RingBuffer.h>
#include "eventqueue.h"
static RingBuffer_t event_queue;
static uint8_t event_queue_data[16];
void eventqueue_init(void)
{
RingBuffer_InitBuffer(&event_queue, event_queue_data, sizeof(event_queue_data));
}
uint8_t eventqueue_pop(uint8_t* key, uint8_t* state)
{
if (RingBuffer_IsEmpty(&event_queue))
return 0;
uint8_t event = RingBuffer_Remove(&event_queue);
*state = (event & 0x80) ? 1 : 0;
*key = event & 0x7F;
return 1;
}
void eventqueue_push(uint8_t key, uint8_t state)
{
uint8_t event = (state) ? 0x80 : 0;
event |= (key & 0x7F);
RingBuffer_Insert(&event_queue, event);
}
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