From d478bdda8e9762f9e3843d94da5c50e3124a61e0 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Mon, 17 Jun 2019 21:07:08 +0200
Subject: [PATCH] pcm/Export: document that Export() may return an empty buffer

---
 src/pcm/PcmExport.hxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/pcm/PcmExport.hxx b/src/pcm/PcmExport.hxx
index d47d1a8c9..b42c7246e 100644
--- a/src/pcm/PcmExport.hxx
+++ b/src/pcm/PcmExport.hxx
@@ -173,7 +173,8 @@ public:
 	 * Export a PCM buffer.
 	 *
 	 * @param src the source PCM buffer
-	 * @return the destination buffer (may be a pointer to the source buffer)
+	 * @return the destination buffer; may be empty (and may be a
+	 * pointer to the source buffer)
 	 */
 	ConstBuffer<void> Export(ConstBuffer<void> src) noexcept;