Added another three effects that you can use with the Sound to F-Curve modifier, have fun!

12 files changed, 758 insertions, 0 deletions

diff --git a/intern/audaspace/FX/AUD_AccumulatorFactory.cpp b/intern/audaspace/FX/AUD_AccumulatorFactory.cpp
new file mode 100644
index 00000000000..20709c57ee5
--- /dev/null
+++ b/intern/audaspace/FX/AUD_AccumulatorFactory.cpp
@@ -0,0 +1,49 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#include "AUD_AccumulatorFactory.h"
+#include "AUD_AccumulatorReader.h"
+
+AUD_AccumulatorFactory::AUD_AccumulatorFactory(AUD_IFactory* factory,
+											   bool additive) :
+		AUD_EffectFactory(factory),
+		m_additive(additive) {}
+
+AUD_AccumulatorFactory::AUD_AccumulatorFactory(bool additive) :
+		AUD_EffectFactory(0),
+		m_additive(additive) {}
+
+AUD_IReader* AUD_AccumulatorFactory::createReader()
+{
+	AUD_IReader* reader = getReader();
+
+	if(reader != 0)
+	{
+		reader = new AUD_AccumulatorReader(reader, m_additive);
+		AUD_NEW("reader")
+	}
+
+	return reader;
+}
diff --git a/intern/audaspace/FX/AUD_AccumulatorFactory.h b/intern/audaspace/FX/AUD_AccumulatorFactory.h
new file mode 100644
index 00000000000..e475a19ccf6
--- /dev/null
+++ b/intern/audaspace/FX/AUD_AccumulatorFactory.h
@@ -0,0 +1,59 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#ifndef AUD_ACCUMULATORFACTORY
+#define AUD_ACCUMULATORFACTORY
+
+#include "AUD_EffectFactory.h"
+
+/**
+ * This factory creates an accumulator reader.
+ */
+class AUD_AccumulatorFactory : public AUD_EffectFactory
+{
+private:
+	/**
+	 * Whether the accumulator is additive.
+	 */
+	bool m_additive;
+
+public:
+	/**
+	 * Creates a new accumulator factory.
+	 * \param factory The input factory.
+	 * \param additive Whether the accumulator is additive.
+	 */
+	AUD_AccumulatorFactory(AUD_IFactory* factory, bool additive = false);
+
+	/**
+	 * Creates a new accumulator factory.
+	 * \param additive Whether the accumulator is additive.
+	 */
+	AUD_AccumulatorFactory(bool additive = false);
+
+	virtual AUD_IReader* createReader();
+};
+
+#endif //AUD_ACCUMULATORFACTORY
diff --git a/intern/audaspace/FX/AUD_AccumulatorReader.cpp b/intern/audaspace/FX/AUD_AccumulatorReader.cpp
new file mode 100644
index 00000000000..67ab4157f9c
--- /dev/null
+++ b/intern/audaspace/FX/AUD_AccumulatorReader.cpp
@@ -0,0 +1,99 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#include "AUD_AccumulatorReader.h"
+#include "AUD_Buffer.h"
+
+#include <cstring>
+
+#define CC specs.channels + channel
+
+AUD_AccumulatorReader::AUD_AccumulatorReader(AUD_IReader* reader,
+											 bool additive) :
+		AUD_EffectReader(reader),
+		m_additive(additive)
+{
+	AUD_Specs specs = reader->getSpecs();
+	int samplesize = AUD_SAMPLE_SIZE(specs);
+
+	m_buffer = new AUD_Buffer(); AUD_NEW("buffer")
+
+	m_sums = new AUD_Buffer(samplesize); AUD_NEW("buffer")
+	memset(m_sums->getBuffer(), 0, samplesize);
+
+	m_prevs = new AUD_Buffer(samplesize); AUD_NEW("buffer")
+	memset(m_prevs->getBuffer(), 0, samplesize);
+}
+
+AUD_AccumulatorReader::~AUD_AccumulatorReader()
+{
+	delete m_buffer; AUD_DELETE("buffer")
+	delete m_sums; AUD_DELETE("buffer")
+	delete m_prevs; AUD_DELETE("buffer")
+}
+
+void AUD_AccumulatorReader::read(int & length, sample_t* & buffer)
+{
+	sample_t* buf;
+	sample_t* sums;
+	sample_t* prevs;
+	sums = m_sums->getBuffer();
+	prevs = m_prevs->getBuffer();
+
+	AUD_Specs specs = m_reader->getSpecs();
+
+	m_reader->read(length, buf);
+	if(m_buffer->getSize() < length * AUD_SAMPLE_SIZE(specs))
+		m_buffer->resize(length * AUD_SAMPLE_SIZE(specs));
+
+	buffer = m_buffer->getBuffer();
+
+	if(m_additive)
+	{
+		for(int channel = 0; channel < specs.channels; channel++)
+		{
+			for(int i = 0; i < length; i++)
+			{
+				if(buf[i * CC] > prevs[channel])
+					sums[channel] += buf[i * CC] - prevs[channel];
+				buffer[i * CC] = sums[channel] + buf[i * CC];
+				prevs[channel] = buf[i * CC];
+			}
+		}
+	}
+	else
+	{
+		for(int channel = 0; channel < specs.channels; channel++)
+		{
+			for(int i = 0; i < length * specs.channels; i++)
+			{
+				if(buf[i * CC] > prevs[channel])
+					sums[channel] += buf[i * CC] - prevs[channel];
+				buffer[i * CC] = sums[channel];
+				prevs[channel] = buf[i * CC];
+			}
+		}
+	}
+}
diff --git a/intern/audaspace/FX/AUD_AccumulatorReader.h b/intern/audaspace/FX/AUD_AccumulatorReader.h
new file mode 100644
index 00000000000..8ad1dda30f6
--- /dev/null
+++ b/intern/audaspace/FX/AUD_AccumulatorReader.h
@@ -0,0 +1,75 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#ifndef AUD_ACCUMULATORREADER
+#define AUD_ACCUMULATORREADER
+
+#include "AUD_EffectReader.h"
+class AUD_Buffer;
+
+/**
+ * This class represents an accumulator.
+ */
+class AUD_AccumulatorReader : public AUD_EffectReader
+{
+private:
+	/**
+	 * The playback buffer.
+	 */
+	AUD_Buffer *m_buffer;
+
+	/**
+	 * The sums of the specific channels.
+	 */
+	AUD_Buffer *m_sums;
+
+	/**
+	 * The previous results of the specific channels.
+	 */
+	AUD_Buffer *m_prevs;
+
+	/**
+	 * Whether the accumulator is additive.
+	 */
+	bool m_additive;
+
+public:
+	/**
+	 * Creates a new accumulator reader.
+	 * \param reader The reader to read from.
+	 * \param additive Whether the accumulator is additive.
+	 * \exception AUD_Exception Thrown if the reader specified is NULL.
+	 */
+	AUD_AccumulatorReader(AUD_IReader* reader, bool additive);
+
+	/**
+	 * Destroys the reader.
+	 */
+	virtual ~AUD_AccumulatorReader();
+
+	virtual void read(int & length, sample_t* & buffer);
+};
+
+#endif //AUD_ACCUMULATORREADER
diff --git a/intern/audaspace/FX/AUD_SquareFactory.cpp b/intern/audaspace/FX/AUD_SquareFactory.cpp
new file mode 100644
index 00000000000..638acaa9a32
--- /dev/null
+++ b/intern/audaspace/FX/AUD_SquareFactory.cpp
@@ -0,0 +1,57 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#include "AUD_SquareFactory.h"
+#include "AUD_SquareReader.h"
+
+AUD_SquareFactory::AUD_SquareFactory(AUD_IFactory* factory, float threshold) :
+		AUD_EffectFactory(factory),
+		m_threshold(threshold) {}
+
+AUD_SquareFactory::AUD_SquareFactory(float threshold) :
+		AUD_EffectFactory(0),
+		m_threshold(threshold) {}
+
+float AUD_SquareFactory::getThreshold()
+{
+	return m_threshold;
+}
+
+void AUD_SquareFactory::setThreshold(float threshold)
+{
+	m_threshold = threshold;
+}
+
+AUD_IReader* AUD_SquareFactory::createReader()
+{
+	AUD_IReader* reader = getReader();
+
+	if(reader != 0)
+	{
+		reader = new AUD_SquareReader(reader, m_threshold); AUD_NEW("reader")
+	}
+
+	return reader;
+}
diff --git a/intern/audaspace/FX/AUD_SquareFactory.h b/intern/audaspace/FX/AUD_SquareFactory.h
new file mode 100644
index 00000000000..dfbe5ae2887
--- /dev/null
+++ b/intern/audaspace/FX/AUD_SquareFactory.h
@@ -0,0 +1,70 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#ifndef AUD_SQUAREFACTORY
+#define AUD_SQUAREFACTORY
+
+#include "AUD_EffectFactory.h"
+
+/**
+ * This factory Transforms any signal to a square signal.
+ */
+class AUD_SquareFactory : public AUD_EffectFactory
+{
+private:
+	/**
+	 * The threshold.
+	 */
+	float m_threshold;
+
+public:
+	/**
+	 * Creates a new square factory.
+	 * \param factory The input factory.
+	 * \param threshold The threshold.
+	 */
+	AUD_SquareFactory(AUD_IFactory* factory = 0, float threshold = 0.0f);
+
+	/**
+	 * Creates a new square factory.
+	 * \param threshold The threshold.
+	 */
+	AUD_SquareFactory(float threshold);
+
+	/**
+	 * Returns the threshold.
+	 */
+	float getThreshold();
+
+	/**
+	 * Sets the threshold.
+	 * \param threshold The new threshold value. Should be between 0.0 and 1.0.
+	 */
+	void setThreshold(float threshold);
+
+	virtual AUD_IReader* createReader();
+};
+
+#endif //AUD_SQUAREFACTORY
diff --git a/intern/audaspace/FX/AUD_SquareReader.cpp b/intern/audaspace/FX/AUD_SquareReader.cpp
new file mode 100644
index 00000000000..2d4dc52fe27
--- /dev/null
+++ b/intern/audaspace/FX/AUD_SquareReader.cpp
@@ -0,0 +1,63 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#include "AUD_SquareReader.h"
+#include "AUD_Buffer.h"
+
+#include <cstring>
+
+AUD_SquareReader::AUD_SquareReader(AUD_IReader* reader, float threshold) :
+		AUD_EffectReader(reader),
+		m_threshold(threshold)
+{
+	m_buffer = new AUD_Buffer(); AUD_NEW("buffer")
+}
+
+AUD_SquareReader::~AUD_SquareReader()
+{
+	delete m_buffer; AUD_DELETE("buffer")
+}
+
+void AUD_SquareReader::read(int & length, sample_t* & buffer)
+{
+	sample_t* buf;
+	AUD_Specs specs = m_reader->getSpecs();
+
+	m_reader->read(length, buf);
+	if(m_buffer->getSize() < length * AUD_SAMPLE_SIZE(specs))
+		m_buffer->resize(length * AUD_SAMPLE_SIZE(specs));
+
+	buffer = m_buffer->getBuffer();
+
+	for(int i = 0; i < length * specs.channels; i++)
+	{
+		if(buf[i] >= m_threshold)
+			buffer[i] = 1.0f;
+		else if(buf[i] <= -m_threshold)
+			buffer[i] = -1.0f;
+		else
+			buffer[i] = 0.0f;
+	}
+}
diff --git a/intern/audaspace/FX/AUD_SquareReader.h b/intern/audaspace/FX/AUD_SquareReader.h
new file mode 100644
index 00000000000..63dda351445
--- /dev/null
+++ b/intern/audaspace/FX/AUD_SquareReader.h
@@ -0,0 +1,65 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#ifndef AUD_SQUAREREADER
+#define AUD_SQUAREREADER
+
+#include "AUD_EffectReader.h"
+class AUD_Buffer;
+
+/**
+ * This class changes another signal into a square signal.
+ */
+class AUD_SquareReader : public AUD_EffectReader
+{
+private:
+	/**
+	 * The playback buffer.
+	 */
+	AUD_Buffer *m_buffer;
+
+	/**
+	 * The threshold level.
+	 */
+	float m_threshold;
+
+public:
+	/**
+	 * Creates a new square reader.
+	 * \param reader The reader to read from.
+	 * \param threshold The size of the buffer.
+	 * \exception AUD_Exception Thrown if the reader specified is NULL.
+	 */
+	AUD_SquareReader(AUD_IReader* reader, float threshold);
+
+	/**
+	 * Destroys the reader.
+	 */
+	virtual ~AUD_SquareReader();
+
+	virtual void read(int & length, sample_t* & buffer);
+};
+
+#endif //AUD_SQUAREREADER
diff --git a/intern/audaspace/FX/AUD_SumFactory.cpp b/intern/audaspace/FX/AUD_SumFactory.cpp
new file mode 100644
index 00000000000..f7990aab8a1
--- /dev/null
+++ b/intern/audaspace/FX/AUD_SumFactory.cpp
@@ -0,0 +1,43 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#include "AUD_SumFactory.h"
+#include "AUD_SumReader.h"
+
+AUD_SumFactory::AUD_SumFactory(AUD_IFactory* factory) :
+		AUD_EffectFactory(factory) {}
+
+AUD_IReader* AUD_SumFactory::createReader()
+{
+	AUD_IReader* reader = getReader();
+
+	if(reader != 0)
+	{
+		reader = new AUD_SumReader(reader);
+		AUD_NEW("reader")
+	}
+
+	return reader;
+}
diff --git a/intern/audaspace/FX/AUD_SumFactory.h b/intern/audaspace/FX/AUD_SumFactory.h
new file mode 100644
index 00000000000..5cb48e26b10
--- /dev/null
+++ b/intern/audaspace/FX/AUD_SumFactory.h
@@ -0,0 +1,46 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#ifndef AUD_SUMFACTORY
+#define AUD_SUMFACTORY
+
+#include "AUD_EffectFactory.h"
+
+/**
+ * This factory creates a sum reader.
+ */
+class AUD_SumFactory : public AUD_EffectFactory
+{
+public:
+	/**
+	 * Creates a new sum factory.
+	 * \param factory The input factory.
+	 */
+	AUD_SumFactory(AUD_IFactory* factory = 0);
+
+	virtual AUD_IReader* createReader();
+};
+
+#endif //AUD_SUMFACTORY
diff --git a/intern/audaspace/FX/AUD_SumReader.cpp b/intern/audaspace/FX/AUD_SumReader.cpp
new file mode 100644
index 00000000000..08747790fc9
--- /dev/null
+++ b/intern/audaspace/FX/AUD_SumReader.cpp
@@ -0,0 +1,68 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#include "AUD_SumReader.h"
+#include "AUD_Buffer.h"
+
+#include <cstring>
+
+#define CC specs.channels + channel
+
+AUD_SumReader::AUD_SumReader(AUD_IReader* reader) :
+		AUD_EffectReader(reader)
+{
+	AUD_Specs specs = reader->getSpecs();
+	int samplesize = AUD_SAMPLE_SIZE(specs);
+
+	m_buffer = new AUD_Buffer(); AUD_NEW("buffer")
+
+	m_sums = new AUD_Buffer(samplesize); AUD_NEW("buffer")
+	memset(m_sums->getBuffer(), 0, samplesize);
+}
+
+AUD_SumReader::~AUD_SumReader()
+{
+	delete m_buffer; AUD_DELETE("buffer")
+	delete m_sums; AUD_DELETE("buffer")
+}
+
+void AUD_SumReader::read(int & length, sample_t* & buffer)
+{
+	sample_t* buf;
+	sample_t* sums;
+	sums = m_sums->getBuffer();
+
+	AUD_Specs specs = m_reader->getSpecs();
+
+	m_reader->read(length, buf);
+	if(m_buffer->getSize() < length * AUD_SAMPLE_SIZE(specs))
+		m_buffer->resize(length * AUD_SAMPLE_SIZE(specs));
+
+	buffer = m_buffer->getBuffer();
+
+	for(int channel = 0; channel < specs.channels; channel++)
+		for(int i = 0; i < length * specs.channels; i++)
+			buffer[i * CC] = sums[channel] = sums[channel] + buf[i * CC];
+}
diff --git a/intern/audaspace/FX/AUD_SumReader.h b/intern/audaspace/FX/AUD_SumReader.h
new file mode 100644
index 00000000000..76ccf2f863a
--- /dev/null
+++ b/intern/audaspace/FX/AUD_SumReader.h
@@ -0,0 +1,64 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#ifndef AUD_SUMREADER
+#define AUD_SUMREADER
+
+#include "AUD_EffectReader.h"
+class AUD_Buffer;
+
+/**
+ * This class represents an summer.
+ */
+class AUD_SumReader : public AUD_EffectReader
+{
+private:
+	/**
+	 * The playback buffer.
+	 */
+	AUD_Buffer *m_buffer;
+
+	/**
+	 * The sums of the specific channels.
+	 */
+	AUD_Buffer *m_sums;
+
+public:
+	/**
+	 * Creates a new sum reader.
+	 * \param reader The reader to read from.
+	 * \exception AUD_Exception Thrown if the reader specified is NULL.
+	 */
+	AUD_SumReader(AUD_IReader* reader);
+
+	/**
+	 * Destroys the reader.
+	 */
+	virtual ~AUD_SumReader();
+
+	virtual void read(int & length, sample_t* & buffer);
+};
+
+#endif //AUD_SUMREADER