1 files changed, 115 insertions, 0 deletions
diff --git a/intern/audaspace/FX/AUD_SuperposeReader.cpp b/intern/audaspace/FX/AUD_SuperposeReader.cpp
new file mode 100644
index 00000000000..546b79a3a77
--- /dev/null
+++ b/intern/audaspace/FX/AUD_SuperposeReader.cpp
@@ -0,0 +1,115 @@
+/*
+ * $Id$
+ *
+ * ***** 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_SuperposeReader.h"
+
+#include <cstring>
+
+static const char* specs_error = "AUD_SuperposeReader: Both readers have to "
+								 "have the same specs.";
+
+AUD_SuperposeReader::AUD_SuperposeReader(AUD_IReader* reader1, AUD_IReader* reader2) :
+	m_reader1(reader1), m_reader2(reader2)
+{
+	try
+	{
+		AUD_Specs s1, s2;
+		s1 = reader1->getSpecs();
+		s2 = reader2->getSpecs();
+		if(memcmp(&s1, &s2, sizeof(AUD_Specs)))
+			AUD_THROW(AUD_ERROR_SPECS, specs_error);
+	}
+	catch(AUD_Exception&)
+	{
+		delete reader1;
+		delete reader2;
+
+		throw;
+	}
+}
+
+AUD_SuperposeReader::~AUD_SuperposeReader()
+{
+	delete m_reader1;
+	delete m_reader2;
+}
+
+bool AUD_SuperposeReader::isSeekable() const
+{
+	return m_reader1->isSeekable() && m_reader2->isSeekable();
+}
+
+void AUD_SuperposeReader::seek(int position)
+{
+	m_reader1->seek(position);
+	m_reader2->seek(position);
+}
+
+int AUD_SuperposeReader::getLength() const
+{
+	int len1 = m_reader1->getLength();
+	int len2 = m_reader2->getLength();
+	if((len1 < 0) || (len2 < 0))
+		return -1;
+	return AUD_MIN(len1, len2);
+}
+
+int AUD_SuperposeReader::getPosition() const
+{
+	int pos1 = m_reader1->getPosition();
+	int pos2 = m_reader2->getPosition();
+	return AUD_MAX(pos1, pos2);
+}
+
+AUD_Specs AUD_SuperposeReader::getSpecs() const
+{
+	return m_reader1->getSpecs();
+}
+
+void AUD_SuperposeReader::read(int & length, sample_t* & buffer)
+{
+	AUD_Specs specs = m_reader1->getSpecs();
+	int samplesize = AUD_SAMPLE_SIZE(specs);
+
+	if(m_buffer.getSize() < length * samplesize)
+		m_buffer.resize(length * samplesize);
+	buffer = m_buffer.getBuffer();
+
+	int len1 = length;
+	sample_t* buf;
+	m_reader1->read(len1, buf);
+	memcpy(buffer, buf, len1 * samplesize);
+
+	if(len1 < length)
+		memset(buffer + len1 * specs.channels, 0, (length - len1) * samplesize);
+
+	int len2 = length;
+	m_reader2->read(len2, buf);
+
+	for(int i = 0; i < len2 * specs.channels; i++)
+		buffer[i] += buf[i];
+
+	length = AUD_MAX(len1, len2);
+}