1 files changed, 104 insertions, 0 deletions
diff --git a/src/engine/EventBuffer.hpp b/src/engine/EventBuffer.hpp
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+++ b/src/engine/EventBuffer.hpp
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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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 EVENTBUFFER_H
+#define EVENTBUFFER_H
+
+#include <iostream>
+#include <lv2ext/lv2_event.h>
+#include <lv2ext/lv2_event_helpers.h>
+#include "Buffer.hpp"
+#include "interface/DataType.hpp"
+
+namespace Ingen {
+
+
+class EventBuffer : public Buffer {
+public:
+	EventBuffer(size_t capacity);
+	
+	~EventBuffer();
+
+	void prepare_read(FrameTime start, SampleCount nframes);
+	void prepare_write(FrameTime start, SampleCount nframes);
+
+	bool join(Buffer* buf);
+	void unjoin();
+
+	inline uint32_t this_nframes() const { return _this_nframes; }
+	inline uint32_t event_count() const { return _buf->event_count; }
+	
+	inline void*       raw_data()       { return _buf; }
+	inline const void* raw_data() const { return _buf; }
+
+	inline LV2_Event_Buffer*       local_data() { return _local_buf; }
+	inline const LV2_Event_Buffer* local_data() const { return _local_buf; }
+
+	inline LV2_Event_Buffer*       data()       { return _buf; }
+	inline const LV2_Event_Buffer* data() const { return _buf; }
+	
+	void copy(const Buffer* src, size_t start_sample, size_t end_sample);
+
+	inline void rewind() const { lv2_event_begin(&_iter, _buf); }
+	inline void clear() { reset(_this_nframes); }
+	inline void reset(SampleCount nframes) {
+		//std::cerr << this << " reset" << std::endl;
+		_this_nframes = nframes;
+		_latest_frames = 0;
+		_latest_subframes = 0;
+		_buf->event_count = 0;
+		_buf->size = 0;
+		rewind();
+	}
+
+	bool increment() const;
+	bool is_valid() const;
+
+	uint32_t latest_frames()    const { return _latest_frames; }
+	uint32_t latest_subframes() const { return _latest_subframes; }
+ 
+	bool get_event(uint32_t* frames,
+	               uint32_t* subframes,
+	               uint16_t* type,
+	               uint16_t* size,
+	               uint8_t** data) const;
+
+	bool append(uint32_t       frames,
+	            uint32_t       subframes,
+	            uint16_t       type,
+	            uint16_t       size,
+	            const uint8_t* data);
+
+	bool append(const LV2_Event_Buffer* buf);
+
+	bool merge(const EventBuffer& a, const EventBuffer& b);
+
+private:
+	LV2_Event_Buffer*  _buf;       ///< Contents (maybe belong to _joined_buf)
+	LV2_Event_Buffer*  _local_buf; ///< Local contents
+
+	mutable LV2_Event_Iterator _iter; ///< Iterator into _buf
+
+	uint32_t _latest_frames;    ///< Latest time of all events (frames)
+	uint32_t _latest_subframes; ///< Latest time of all events (subframes)
+	uint32_t _this_nframes;     ///< Current cycle nframes
+};
+
+
+} // namespace Ingen
+
+#endif // EVENTBUFFER_H