abstract volume/balance output away from ponymix

Add a Notifier virtual base class and a CommandLineNotifier
implementation which handles output of volume and balance levels after a
change.

1 files changed, 38 insertions, 0 deletions

diff --git a/notify.h b/notify.h
new file mode 100644
index 0000000..03f6775
--- /dev/null
+++ b/notify.h
@@ -0,0 +1,38 @@
+#pragma once
+
+#include <stdio.h>
+
+enum NotificationType {
+  NOTIFY_VOLUME,
+  NOTIFY_BALANCE,
+  NOTIFY_UNMUTE,
+  NOTIFY_MUTE,
+};
+
+class Notifier {
+ public:
+  virtual ~Notifier() {}
+
+  virtual void Notify(enum NotificationType type, long value, bool mute) = 0;
+
+ protected:
+  bool initialized_;
+};
+
+class CommandLineNotifier : public Notifier {
+ public:
+  virtual ~CommandLineNotifier() {}
+
+  virtual void Notify(enum NotificationType type, long value, bool) {
+    switch (type) {
+    case NOTIFY_VOLUME:
+    case NOTIFY_BALANCE:
+    case NOTIFY_UNMUTE:
+    case NOTIFY_MUTE:
+      printf("%ld\n", value);
+      break;
+    }
+  }
+};
+
+// vim: set et ts=2 sw=2: