catching up (trying to) wiht CSpot

components/spotify/cspot/bell/include/AudioSink.h

@@ -0,0 +1,21 @@
+#ifndef AUDIOSINK_H
+#define AUDIOSINK_H
+
+#include <cstdint>
+#include <cstdlib>
+#include <vector>
+
+class AudioSink
+{
+  public:
+	AudioSink() {}
+	virtual ~AudioSink() {}
+	virtual void feedPCMFrames(const uint8_t *buffer, size_t bytes) = 0;
+	virtual void volumeChanged(uint16_t volume) {}
+	// return true if the sink supports rate changing
+	virtual bool setRate(uint16_t sampleRate) { return false; }
+	bool softwareVolumeControl = true;
+	bool usign = false;
+};
+
+#endif