2.5: Sound branch merge!

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1 files changed, 111 insertions, 0 deletions

diff --git a/intern/audaspace/FX/AUD_DelayReader.cpp b/intern/audaspace/FX/AUD_DelayReader.cpp
new file mode 100644
index 00000000000..38d3b893b5c
--- /dev/null
+++ b/intern/audaspace/FX/AUD_DelayReader.cpp
@@ -0,0 +1,111 @@
+/*
+ * $Id$
+ *
+ * ***** 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_DelayReader.h"
+#include "AUD_Buffer.h"
+
+#include <cstring>
+
+AUD_DelayReader::AUD_DelayReader(AUD_IReader* reader, float delay) :
+		AUD_EffectReader(reader)
+{
+	m_delay = (int)(delay * reader->getSpecs().rate);
+	m_remdelay = m_delay;
+	m_buffer = new AUD_Buffer(); AUD_NEW("buffer")
+}
+
+AUD_DelayReader::~AUD_DelayReader()
+{
+	delete m_buffer; AUD_DELETE("buffer")
+}
+
+void AUD_DelayReader::seek(int position)
+{
+	if(position < 0)
+		return;
+
+	if(position < m_delay)
+	{
+		m_remdelay = m_delay - position;
+		m_reader->seek(0);
+	}
+	else
+	{
+		m_remdelay = 0;
+		m_reader->seek(position - m_delay);
+	}
+}
+
+int AUD_DelayReader::getLength()
+{
+	int len = m_reader->getLength();
+	if(len < 0)
+		return len;
+	return len+m_delay;
+}
+
+int AUD_DelayReader::getPosition()
+{
+	if(m_remdelay > 0)
+		return m_delay-m_remdelay;
+	return m_reader->getPosition() + m_delay;
+}
+
+void AUD_DelayReader::read(int & length, sample_t* & buffer)
+{
+	if(m_remdelay > 0)
+	{
+		int samplesize = AUD_SAMPLE_SIZE(m_reader->getSpecs());
+
+		if(m_buffer->getSize() < length*samplesize)
+			m_buffer->resize(length*samplesize);
+
+		if(length > m_remdelay)
+		{
+			if(getSpecs().format == AUD_FORMAT_U8)
+				memset(m_buffer->getBuffer(), 0x80, m_remdelay*samplesize);
+			else
+				memset(m_buffer->getBuffer(), 0, m_remdelay*samplesize);
+			int len = length - m_remdelay;
+			m_reader->read(len, buffer);
+			memcpy(m_buffer->getBuffer()+m_remdelay*samplesize,
+				   buffer, len*samplesize);
+			if(len < length-m_remdelay)
+				length = m_remdelay + len;
+			m_remdelay = 0;
+		}
+		else
+		{
+			if(getSpecs().format == AUD_FORMAT_U8)
+				memset(m_buffer->getBuffer(), 0x80, length*samplesize);
+			else
+				memset(m_buffer->getBuffer(), 0, length*samplesize);
+			m_remdelay -= length;
+		}
+		buffer = m_buffer->getBuffer();
+	}
+	else
+		m_reader->read(length, buffer);
+}