1 files changed, 76 insertions, 0 deletions
diff --git a/intern/audaspace/FX/AUD_BaseIIRFilterReader.cpp b/intern/audaspace/FX/AUD_BaseIIRFilterReader.cpp
new file mode 100644
index 00000000000..9e14bcf0e40
--- /dev/null
+++ b/intern/audaspace/FX/AUD_BaseIIRFilterReader.cpp
@@ -0,0 +1,76 @@
+/*
+ * $Id$
+ *
+ * ***** 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_BaseIIRFilterReader.h"
+
+#include <cstring>
+
+#define CC m_channels + m_channel
+
+AUD_BaseIIRFilterReader::AUD_BaseIIRFilterReader(AUD_IReader* reader, int in,
+												 int out) :
+		AUD_EffectReader(reader),
+		m_channels(reader->getSpecs().channels),
+		m_xlen(in), m_ylen(out),
+		m_xpos(0), m_ypos(0), m_channel(0)
+{
+	m_x = new sample_t[in * m_channels];
+	m_y = new sample_t[out * m_channels];
+
+	memset(m_x, 0, sizeof(sample_t) * in * m_channels);
+	memset(m_y, 0, sizeof(sample_t) * out * m_channels);
+}
+
+AUD_BaseIIRFilterReader::~AUD_BaseIIRFilterReader()
+{
+	delete[] m_x;
+	delete[] m_y;
+}
+
+void AUD_BaseIIRFilterReader::read(int & length, sample_t* & buffer)
+{
+	sample_t* buf;
+
+	int samplesize = AUD_SAMPLE_SIZE(m_reader->getSpecs());
+
+	m_reader->read(length, buf);
+
+	if(m_buffer.getSize() < length * samplesize)
+		m_buffer.resize(length * samplesize);
+
+	buffer = m_buffer.getBuffer();
+
+	for(m_channel = 0; m_channel < m_channels; m_channel++)
+	{
+		for(int i = 0; i < length; i++)
+		{
+			m_x[m_xpos * CC] = buf[i * CC];
+			m_y[m_ypos * CC] = buffer[i * CC] = filter();
+
+			m_xpos = (m_xpos + 1) % m_xlen;
+			m_ypos = (m_ypos + 1) % m_ylen;
+		}
+	}
+}