1 files changed, 83 insertions, 0 deletions
diff --git a/src/libs/engine/AudioBuffer.hpp b/src/libs/engine/AudioBuffer.hpp
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+++ b/src/libs/engine/AudioBuffer.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 AUDIOBUFFER_H
+#define AUDIOBUFFER_H
+
+#include <cstddef>
+#include <cassert>
+#include <boost/utility.hpp>
+#include "types.hpp"
+#include "Buffer.hpp"
+
+namespace Ingen {
+
+	
+class AudioBuffer : public Buffer
+{
+public:
+	AudioBuffer(size_t capacity);
+
+	void clear();
+	void set(Sample val, size_t start_sample);
+	void set(Sample val, size_t start_sample, size_t end_sample);
+	void scale(Sample val, size_t start_sample, size_t end_sample);
+	void copy(const AudioBuffer* src, size_t start_sample, size_t end_sample);
+	void accumulate(const AudioBuffer* src, size_t start_sample, size_t end_sample);
+	
+	bool join(Buffer* buf);
+	void unjoin();
+	bool is_joined_to(Buffer* buf) const;
+	
+	/** For driver use only!! */
+	void set_data(Sample* data);
+	
+	inline Sample* data() const
+		{ return ((_joined_buf != NULL) ? _joined_buf->data() : _data); }
+	
+	inline Sample& value_at(size_t offset) const
+		{ assert(offset < _size); return data()[offset]; }
+	
+	void prepare_read(SampleCount nframes);
+	void prepare_write(SampleCount nframes) {}
+	
+	void reset(SampleCount nframes) {}
+	void resize(size_t size);
+	
+	void      filled_size(size_t size) { _filled_size = size; }
+	size_t    filled_size() const { return _filled_size; }
+	size_t    size()        const { return _size; }
+
+private:
+	enum State { OK, HALF_SET_CYCLE_1, HALF_SET_CYCLE_2 };
+
+	void allocate();
+	void deallocate();
+
+	Sample*      _data;        ///< Used data pointer (probably same as _local_data)
+	Sample*      _local_data;  ///< Locally allocated buffer (possibly unused if joined or set_data used)
+	AudioBuffer* _joined_buf;  ///< Buffer to mirror, if joined
+	size_t       _size;        ///< Allocated buffer size
+	size_t       _filled_size; ///< Usable buffer size (for MIDI ports etc)
+	State        _state;       ///< State of buffer for setting values next cycle
+	Sample       _set_value;   ///< Value set by @ref set (may need to be set next cycle)
+};
+
+
+} // namespace Ingen
+
+#endif // AUDIOBUFFER_H