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/* This file is part of Evoral.
* Copyright (C) 2008 Dave Robillard <http://drobilla.net>
*
* Evoral 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 of the License, or (at your option) any later
* version.
*
* Evoral 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 details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef EVORAL_EVENT_RING_BUFFER_HPP
#define EVORAL_EVENT_RING_BUFFER_HPP
#include <glib.h>
#include "evoral/RingBuffer.hpp"
#include "evoral/EventSink.hpp"
#include "evoral/types.hpp"
#include <iostream>
using namespace std;
namespace Evoral {
/** A RingBuffer of events (generic time-stamped binary "blobs").
*
* This packs a timestamp, size, and size bytes of data flat into the buffer.
* Useful for MIDI events, OSC messages, etc.
*/
template<typename Time>
class EventRingBuffer : public Evoral::RingBuffer<uint8_t>, public Evoral::EventSink<Time> {
public:
/** @param capacity Ringbuffer capacity in bytes.
*/
EventRingBuffer(size_t capacity) : RingBuffer<uint8_t>(capacity)
{}
size_t capacity() const { return _size; }
bool peek_time(Time* time);
uint32_t write(Time time, EventType type, uint32_t size, const uint8_t* buf);
bool read (Time* time, EventType* type, uint32_t* size, uint8_t* buf);
};
template<typename Time>
inline bool
EventRingBuffer<Time>::peek_time(Time* time)
{
bool success = RingBuffer<uint8_t>::full_peek(sizeof(Time), (uint8_t*)time);
return success;
}
template<typename Time>
inline bool
EventRingBuffer<Time>::read(Time* time, EventType* type, uint32_t* size, uint8_t* buf)
{
bool success = RingBuffer<uint8_t>::full_read(sizeof(Time), (uint8_t*)time);
if (success)
success = RingBuffer<uint8_t>::full_read(sizeof(EventType), (uint8_t*)type);
if (success)
success = RingBuffer<uint8_t>::full_read(sizeof(uint32_t), (uint8_t*)size);
if (success)
success = RingBuffer<uint8_t>::full_read(*size, buf);
return success;
}
template<typename Time>
inline uint32_t
EventRingBuffer<Time>::write(Time time, EventType type, uint32_t size, const uint8_t* buf)
{
if (write_space() < (sizeof(Time) + sizeof(EventType) + sizeof(uint32_t) + size)) {
return 0;
} else {
RingBuffer<uint8_t>::write(sizeof(Time), (uint8_t*)&time);
RingBuffer<uint8_t>::write(sizeof(EventType), (uint8_t*)&type);
RingBuffer<uint8_t>::write(sizeof(uint32_t), (uint8_t*)&size);
RingBuffer<uint8_t>::write(size, buf);
return size;
}
}
} // namespace Evoral
#endif // EVORAL_EVENT_RING_BUFFER_HPP
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