refactor: Rename BlackSound to swift::sound

src/sound/sampleprovider/sawtoothgenerator.cpp

@@ -0,0 +1,30 @@
+// SPDX-FileCopyrightText: Copyright (C) 2019 swift Project Community / Contributors
+// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-swift-pilot-client-1
+
+#include "sawtoothgenerator.h"
+#include <cmath>
+
+namespace swift::sound::sample_provider
+{
+    CSawToothGenerator::CSawToothGenerator(double frequency, QObject *parent) : ISampleProvider(parent),
+                                                                                m_frequency(frequency)
+    {
+        this->setObjectName("CSawToothGenerator");
+    }
+
+    int CSawToothGenerator::readSamples(QVector<float> &samples, qint64 count)
+    {
+        samples.clear();
+        samples.fill(0, static_cast<int>(count));
+
+        for (int sampleCount = 0; sampleCount < count; sampleCount++)
+        {
+            double multiple = 2 * m_frequency / m_sampleRate;
+            double sampleSaw = std::fmod((m_nSample * multiple), 2) - 1;
+            double sampleValue = m_gain * sampleSaw;
+            samples[sampleCount] = static_cast<float>(sampleValue);
+            m_nSample++;
+        }
+        return static_cast<int>(count);
+    }
+} // ns