Resolves #393 - Adds support for recording demodulated (raw) bitstream

buffers.  None of the decoders currently support this yet, but the P25
will be updated to provide bitstream output for recording.

Renames the ReusableBuffer class to ReusableFloatBuffer for
consistency.

src/main/java/io/github/dsheirer/sample/buffer/ReusableByteBuffer.java

@@ -0,0 +1,97 @@
+/*******************************************************************************
+ * sdr-trunk
+ * Copyright (C) 2014-2018 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.buffer;
+
+import org.apache.commons.lang3.Validate;
+
+public class ReusableByteBuffer extends AbstractReusableBuffer
+{
+    private byte[] mSamples;
+
+    /**
+     * Creates a reusable, timestamped byte buffer using the specified time in milliseconds.
+     *
+     * NOTE: reusability of this buffer requires strict user count tracking.  Each component that receives this
+     * buffer should not modify the buffer contents.  Each component should also increment the user count before
+     * sending this buffer to another component and should decrement the user count when finished using this buffer.
+     *
+     * @param bufferDisposedListener to be notified when all consumers/users are finished using the buffer
+     * @param bytes of data
+     * @param timestamp in millis for the buffer
+     */
+    ReusableByteBuffer(IReusableBufferDisposedListener bufferDisposedListener, byte[] bytes, long timestamp)
+    {
+        super(bufferDisposedListener, timestamp);
+        mSamples = bytes;
+
+        Validate.notNull(bufferDisposedListener, "Reusable Byte Buffer Listener cannot be null");
+    }
+
+    /**
+     * Constructs a timestamped byte buffer using the current system time in milliseconds.
+     *
+     * NOTE: reusability of this buffer requires strict user count tracking.  Each component that receives this
+     * buffer should not modify the buffer contents.  Each component should also increment the user count before
+     * sending this buffer to another component and should decrement the user count when finished using this buffer.
+     *
+     * @param bufferDisposedListener to be notified when all consumers are finished using the buffer
+     * @param bytes of data
+     */
+    public ReusableByteBuffer(IReusableBufferDisposedListener bufferDisposedListener, byte[] bytes)
+    {
+        this(bufferDisposedListener, bytes, System.currentTimeMillis());
+    }
+
+    /**
+     * Samples for this buffer
+     */
+    public byte[] getBytes()
+    {
+        return mSamples;
+    }
+
+    /**
+     * Creates a copy of the samples from this buffer
+     */
+    public byte[] getSamplesCopy()
+    {
+        byte[] bytes = getBytes();
+        byte[] copy = new byte[bytes.length];
+        System.arraycopy(bytes, 0, copy, 0, bytes.length);
+        return copy;
+    }
+
+    /**
+     * Number of bytes contained in this buffer
+     */
+    public int getSampleCount()
+    {
+        return getBytes().length;
+    }
+
+    /**
+     * Resizes the internal array to the size argument
+     *
+     * @param size for the internal array
+     */
+    protected void resize(int size)
+    {
+        if(mSamples.length != size)
+        {
+            mSamples = new byte[size];
+        }
+    }
+}