move to new cspot

components/spotify/cspot/bell/main/audio-dsp/Gain.cpp

@@ -0,0 +1,31 @@
+#include "Gain.h"
+
+using namespace bell;
+
+Gain::Gain() : AudioTransform()
+{
+    this->gainFactor = 1.0f;
+    this->filterType = "gain";
+}
+
+void Gain::configure(std::vector<int> channels, float gainDB)
+{
+    this->channels = channels;
+    this->gainDb = gainDB;
+    this->gainFactor = std::pow(10.0f, gainDB / 20.0f);
+}
+
+std::unique_ptr<StreamInfo> Gain::process(std::unique_ptr<StreamInfo> data)
+{
+    std::scoped_lock lock(this->accessMutex);
+    for (int i = 0; i < data->numSamples; i++)
+    {
+        // Apply gain to all channels
+        for (auto &channel : channels)
+        {
+            data->data[channel][i] *= gainFactor;
+        }
+    }
+
+    return data;
+}