release v0.18.20

Version 2.5 fixed an API oddity, however it broke API compatibility,
at least with C++.  Disable the workaround when a libavformat version
is detected that is recent enough.

NEWS

@@ -1,3 +1,8 @@
+ver 0.18.20 (2014/12/08)
+* decoder
+  - ffmpeg: support FFmpeg 2.5
+* fix build failure with musl
+
 ver 0.18.19 (2014/11/26)
 * archive
   - zzip: fix crash after seeking

configure.ac

@@ -1,10 +1,10 @@
 AC_PREREQ(2.60)
 
-AC_INIT(mpd, 0.18.19, mpd-devel@musicpd.org)
+AC_INIT(mpd, 0.18.20, mpd-devel@musicpd.org)
 
 VERSION_MAJOR=0
 VERSION_MINOR=18
-VERSION_REVISION=19
+VERSION_REVISION=20
 VERSION_EXTRA=0
 
 AC_CONFIG_SRCDIR([src/Main.cxx])

src/decoder/FfmpegDecoderPlugin.cxx

@@ -394,10 +394,15 @@ ffmpeg_probe(Decoder *decoder, InputStream &is)
 	avpd.filename = is.uri.c_str();
 
 #ifdef AVPROBE_SCORE_MIME
+#if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(56, 5, 1)
 	/* this attribute was added in libav/ffmpeg version 11, but
 	   unfortunately it's "uint8_t" instead of "char", and it's
 	   not "const" - wtf? */
 	avpd.mime_type = (uint8_t *)const_cast<char *>(is.GetMimeType());
+#else
+	/* API problem fixed in FFmpeg 2.5 */
+	avpd.mime_type = is.GetMimeType();
+#endif
 #endif
 
 	return av_probe_input_format(&avpd, true);

src/thread/Id.hxx

@@ -75,7 +75,7 @@ public:
 #ifdef WIN32
 		return ::GetCurrentThreadId();
 #else
-		return ::pthread_self();
+		return pthread_self();
 #endif
 	}
 
@@ -84,7 +84,7 @@ public:
 #ifdef WIN32
 		return id == other.id;
 #else
-		return ::pthread_equal(id, other.id);
+		return pthread_equal(id, other.id);
 #endif
 	}