AFV initial commit

src/blacksound/sampleprovider/mixingsampleprovider.cpp

@@ -0,0 +1,36 @@
+#include "mixingsampleprovider.h"
+
+int MixingSampleProvider::readSamples(QVector<qint16> &samples, qint64 count)
+{
+    samples.clear();
+    samples.fill(0, count);
+    int outputLen = 0;
+
+    QVector<ISampleProvider*> finishedProviders;
+    for (int i = 0; i < m_sources.size(); i++)
+    {
+        ISampleProvider *sampleProvider = m_sources.at(i);
+        QVector<qint16> sourceBuffer;
+        int len = sampleProvider->readSamples(sourceBuffer, count);
+
+        for (int n = 0; n < len; n++)
+        {
+            samples[n] += sourceBuffer[n];
+        }
+
+        outputLen = qMax(len, outputLen);
+
+        if (sampleProvider->isFinished())
+        {
+            finishedProviders.push_back(sampleProvider);
+        }
+    }
+
+    for (ISampleProvider *sampleProvider : finishedProviders)
+    {
+        sampleProvider->deleteLater();
+        m_sources.removeAll(sampleProvider);
+    }
+
+    return outputLen;
+}