1 files changed, 109 insertions, 0 deletions
diff --git a/src/server/AudioBuffer.hpp b/src/server/AudioBuffer.hpp
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+++ b/src/server/AudioBuffer.hpp
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+/* This file is part of Ingen.
+ * Copyright 2007-2011 David 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 INGEN_ENGINE_AUDIOBUFFER_HPP
+#define INGEN_ENGINE_AUDIOBUFFER_HPP
+
+#include <cstddef>
+#include <cassert>
+#include <boost/utility.hpp>
+#include "types.hpp"
+#include "ObjectBuffer.hpp"
+#include "Context.hpp"
+
+using namespace std;
+
+namespace Ingen {
+namespace Server {
+
+class AudioBuffer : public ObjectBuffer
+{
+public:
+	AudioBuffer(BufferFactory& bufs, PortType type, size_t capacity);
+
+	void clear();
+
+	void set_value(Sample val, FrameTime cycle_start, FrameTime time);
+	void set_block(Sample val, size_t start_offset, size_t end_offset);
+	void copy(const Sample* src, size_t start_sample, size_t end_sample);
+	void copy(Context& context, const Buffer* src);
+	void accumulate(Context& context, const AudioBuffer* src);
+
+	inline bool is_control() const { return _type.symbol() == PortType::CONTROL; }
+
+	inline Sample* data() const {
+		return (is_control())
+				? (Sample*)atom()->body
+				: (Sample*)(atom()->body + sizeof(LV2_Atom_Vector));
+	}
+
+	inline SampleCount nframes() const {
+		return (is_control())
+				? 1
+				: (_size - sizeof(LV2_Atom) - sizeof(LV2_Atom_Vector)) / sizeof(Sample);
+	}
+
+	inline Sample& value_at(size_t offset) const
+		{ assert(offset < nframes()); return data()[offset]; }
+
+	void prepare_read(Context& context);
+	void prepare_write(Context& context) {}
+
+	void resize(size_t size);
+
+private:
+	enum State { OK, HALF_SET_CYCLE_1, HALF_SET_CYCLE_2 };
+
+	LV2_Atom_Vector* vector() { return(LV2_Atom_Vector*)atom()->body; }
+
+	State     _state;     ///< State of buffer for setting values next cycle
+	Sample    _set_value; ///< Value set by set_value (for completing the set next cycle)
+	FrameTime _set_time;  ///< Time _set_value was set (to reset next cycle)
+};
+
+/** Accumulate a block of @a src into buffer.
+ */
+inline void
+AudioBuffer::accumulate(Context& context, const AudioBuffer* const src)
+{
+	Sample* const       buf     = data();
+	const Sample* const src_buf = src->data();
+
+	if (is_control()) {
+		if (src->is_control()) { // control => control
+			buf[0] += src_buf[0];
+		} else { // audio => control
+			buf[0] += src_buf[context.offset()];
+		}
+	} else {
+		const SampleCount end = context.offset() + context.nframes();
+		if (src->is_control()) { // control => audio
+			for (SampleCount i = context.offset(); i < end; ++i) {
+				buf[i] += src_buf[0];
+			}
+		} else { // audio => audio
+			for (SampleCount i = context.offset(); i < end; ++i) {
+				buf[i] += src_buf[i];
+			}
+		}
+	}
+}
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_AUDIOBUFFER_HPP