From 1d436b3c866d6fa4837d8392630491c117789fb5 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Wed, 20 Mar 2019 13:15:05 +0100
Subject: [PATCH] lib/ffmpeg/IOContext: keep using avio_read() with old
 libavformat versions

avio_read_partial() was added in libavformat 57.81.100, and we keep
compatibility with version 57.40 for now.  Fixes regression from
commit bfb7b0117fb4d

Closes https://github.com/MusicPlayerDaemon/MPD/issues/511
---
 src/lib/ffmpeg/IOContext.hxx | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/lib/ffmpeg/IOContext.hxx b/src/lib/ffmpeg/IOContext.hxx
index 6530f3568..54a602227 100644
--- a/src/lib/ffmpeg/IOContext.hxx
+++ b/src/lib/ffmpeg/IOContext.hxx
@@ -76,8 +76,13 @@ public:
 	}
 
 	size_t Read(void *buffer, size_t size) {
+#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 81, 100)
 		int result = avio_read_partial(io_context,
 					       (unsigned char *)buffer, size);
+#else
+		int result = avio_read(io_context,
+				       (unsigned char *)buffer, size);
+#endif
 		if (result < 0)
 			throw MakeFfmpegError(result, "avio_read() failed");