2.5: Sound branch merge!

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1 files changed, 95 insertions, 0 deletions

diff --git a/intern/audaspace/FX/AUD_LimiterReader.cpp b/intern/audaspace/FX/AUD_LimiterReader.cpp
new file mode 100644
index 00000000000..05882369001
--- /dev/null
+++ b/intern/audaspace/FX/AUD_LimiterReader.cpp
@@ -0,0 +1,95 @@
+/*
+ * $Id$
+ *
+ * ***** 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_LimiterReader.h"
+#include "AUD_Buffer.h"
+
+#include <iostream>
+
+AUD_LimiterReader::AUD_LimiterReader(AUD_IReader* reader,
+									 float start, float end) :
+		AUD_EffectReader(reader)
+{
+	m_end = (int)(end * reader->getSpecs().rate);
+
+	if(start <= 0)
+		m_start = 0;
+	else
+	{
+		m_start = (int)(start * reader->getSpecs().rate);
+		if(m_reader->isSeekable())
+			m_reader->seek(m_start);
+		else
+		{
+			// skip first m_start samples by reading them
+			int length;
+			sample_t* buffer;
+			for(int i = m_start;
+				i >= AUD_DEFAULT_BUFFER_SIZE;
+				i -= AUD_DEFAULT_BUFFER_SIZE)
+			{
+				length = AUD_DEFAULT_BUFFER_SIZE;
+				m_reader->read(length, buffer);
+				length = i;
+			}
+			m_reader->read(length, buffer);
+		}
+	}
+}
+
+void AUD_LimiterReader::seek(int position)
+{
+	m_reader->seek(position + m_start);
+}
+
+int AUD_LimiterReader::getLength()
+{
+	int len = m_reader->getLength();
+	if(m_reader->getType() != AUD_TYPE_BUFFER || len < 0 ||
+	   (len > m_end && m_end >= 0))
+		len = m_end;
+	return len - m_start;
+}
+
+int AUD_LimiterReader::getPosition()
+{
+	return m_reader->getPosition() - m_start;
+}
+
+void AUD_LimiterReader::read(int & length, sample_t* & buffer)
+{
+	if(m_end >= 0)
+	{
+		int position = m_reader->getPosition();
+		if(position+length > m_end)
+			length = m_end - position;
+		if(length < 0)
+		{
+			length = 0;
+			return;
+		}
+	}
+	m_reader->read(length, buffer);
+}