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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.
+ */
+class EventRingBuffer : public Evoral::RingBuffer<uint8_t>, public Evoral::EventSink {
+public:
+
+ /** @param capacity Ringbuffer capacity in bytes.
+ */
+ EventRingBuffer(size_t capacity) : RingBuffer<uint8_t>(capacity)
+ {}
+
+ size_t capacity() const { return _size; }
+
+ bool peek_time(EventTime* time);
+
+ uint32_t write(EventTime time, EventType type, uint32_t size, const uint8_t* buf);
+ bool read (EventTime* time, EventType* type, uint32_t* size, uint8_t* buf);
+};
+
+
+inline bool
+EventRingBuffer::peek_time(EventTime* time)
+{
+ bool success = RingBuffer<uint8_t>::full_peek(sizeof(EventTime), (uint8_t*)time);
+ return success;
+}
+
+
+inline bool
+EventRingBuffer::read(EventTime* time, EventType* type, uint32_t* size, uint8_t* buf)
+{
+ bool success = RingBuffer<uint8_t>::full_read(sizeof(EventTime), (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;
+}
+
+
+inline uint32_t
+EventRingBuffer::write(EventTime time, EventType type, uint32_t size, const uint8_t* buf)
+{
+ if (write_space() < (sizeof(EventTime) + sizeof(EventType) + sizeof(uint32_t) + size)) {
+ return 0;
+ } else {
+ RingBuffer<uint8_t>::write(sizeof(EventTime), (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
+