1 files changed, 83 insertions, 0 deletions
diff --git a/extern/audaspace/src/generator/SquareReader.cpp b/extern/audaspace/src/generator/SquareReader.cpp
new file mode 100644
index 00000000000..8f49b097487
--- /dev/null
+++ b/extern/audaspace/src/generator/SquareReader.cpp
@@ -0,0 +1,83 @@
+/*******************************************************************************
+ * Copyright 2009-2016 Jörg Müller
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ ******************************************************************************/
+
+#include "generator/SquareReader.h"
+
+#include <cmath>
+
+AUD_NAMESPACE_BEGIN
+
+SquareReader::SquareReader(float frequency, SampleRate sampleRate) :
+	m_frequency(frequency),
+	m_position(0),
+	m_sample(0),
+	m_sampleRate(sampleRate)
+{
+}
+
+void SquareReader::setFrequency(float frequency)
+{
+	m_frequency = frequency;
+}
+
+bool SquareReader::isSeekable() const
+{
+	return true;
+}
+
+void SquareReader::seek(int position)
+{
+	m_position = position;
+	m_sample = std::fmod(m_position * m_frequency / (float)m_sampleRate, 2.0f);
+}
+
+int SquareReader::getLength() const
+{
+	return -1;
+}
+
+int SquareReader::getPosition() const
+{
+	return m_position;
+}
+
+Specs SquareReader::getSpecs() const
+{
+	Specs specs;
+	specs.rate = m_sampleRate;
+	specs.channels = CHANNELS_MONO;
+	return specs;
+}
+
+void SquareReader::read(int& length, bool& eos, sample_t* buffer)
+{
+	float k = 2.0 * m_frequency / m_sampleRate;
+
+	for(int i = 0; i < length; i++)
+	{
+		m_sample += k;
+
+		if(m_sample >= 2.0f)
+			m_sample = std::fmod(m_sample, 2.0f);
+
+		buffer[i] = (m_sample < 1.0f) * 2.0f - 1.0f;
+	}
+
+	m_position += length;
+	eos = false;
+}
+
+AUD_NAMESPACE_END