renamed decoder plugin "mp4" to "mp4ff"

src/Makefile.am

@@ -283,7 +283,7 @@ mpd_SOURCES += decoder/faad_plugin.c
 endif
 
 if HAVE_MP4
-mpd_SOURCES += decoder/mp4_plugin.c
+mpd_SOURCES += decoder/mp4ff_plugin.c
 endif
 
 if HAVE_OGG_COMMON

src/decoder/mp4_plugin.c → src/decoder/mp4ff_plugin.c

@@ -411,7 +411,7 @@ mp4_tag_dup(const char *file)
 static const char *const mp4_suffixes[] = { "m4a", "mp4", NULL };
 static const char *const mp4_mime_types[] = { "audio/mp4", "audio/m4a", NULL };
 
-const struct decoder_plugin mp4_plugin = {
+const struct decoder_plugin mp4ff_decoder_plugin = {
 	.name = "mp4",
 	.stream_decode = mp4_decode,
 	.tag_dup = mp4_tag_dup,

src/decoder_list.c

@@ -31,7 +31,7 @@ extern const struct decoder_plugin vorbis_decoder_plugin;
 extern const struct decoder_plugin flac_decoder_plugin;
 extern const struct decoder_plugin oggflac_decoder_plugin;
 extern const struct decoder_plugin audiofilePlugin;
-extern const struct decoder_plugin mp4_plugin;
+extern const struct decoder_plugin mp4ff_decoder_plugin;
 extern const struct decoder_plugin faad_decoder_plugin;
 extern const struct decoder_plugin mpcPlugin;
 extern const struct decoder_plugin wavpack_plugin;
@@ -62,7 +62,7 @@ static const struct decoder_plugin *const decoder_plugins[] = {
 	&faad_decoder_plugin,
 #endif
 #ifdef HAVE_MP4
-	&mp4_plugin,
+	&mp4ff_decoder_plugin,
 #endif
 #ifdef HAVE_MPCDEC
 	&mpcPlugin,