Merges from master branch.

src/main/java/io/github/dsheirer/sample/complex/IComplexBufferProvider.java

@@ -0,0 +1,39 @@
+/*******************************************************************************
+ * sdrtrunk
+ * Copyright (C) 2014-2017 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ ******************************************************************************/
+package io.github.dsheirer.sample.complex;
+
+import io.github.dsheirer.sample.Listener;
+
+public interface IComplexBufferProvider
+{
+    /**
+     * Adds the listener to receive complex buffer samples
+     */
+    void addComplexBufferListener(Listener<ComplexBuffer> listener);
+
+    /**
+     * Removes the listener from receiving complex buffer samples
+     */
+    void removeComplexBufferListener(Listener<ComplexBuffer> listener);
+
+    /**
+     * Indicates if there are any complex buffer listeners registered
+     */
+    boolean hasComplexBufferListeners();
+}