1 files changed, 56 insertions, 0 deletions
diff --git a/src/pcm/PcmBuffer.cxx b/src/pcm/PcmBuffer.cxx
new file mode 100644
index 000000000..a70888080
--- /dev/null
+++ b/src/pcm/PcmBuffer.cxx
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "PcmBuffer.hxx"
+#include "poison.h"
+
+/**
+ * Align the specified size to the next 8k boundary.
+ */
+G_GNUC_CONST
+static size_t
+align_8k(size_t size)
+{
+	return ((size - 1) | 0x1fff) + 1;
+}
+
+void *
+PcmBuffer::Get(size_t new_size)
+{
+	if (new_size == 0)
+		/* never return NULL, because NULL would be assumed to
+		   be an error condition */
+		new_size = 1;
+
+	if (size < new_size) {
+		/* free the old buffer */
+		g_free(buffer);
+
+		size = align_8k(new_size);
+		buffer = g_malloc(size);
+	} else {
+		/* discard old buffer contents */
+		poison_undefined(buffer, size);
+	}
+
+	assert(size >= new_size);
+
+	return buffer;
+}