* update mpg123 to 1.25.6

https://www.mpg123.de/
https://www.mpg123.de/download/mpg123-1.25.6.tar.bz2

./configure --disable-shared --enable-static && make install

mpg123/include/mpg123.h

@@ -1,5 +1,5 @@
 /*
-	libmpg123: MPEG Audio Decoder library (version 1.24.0)
+	libmpg123: MPEG Audio Decoder library (version 1.25.6)
 
 	copyright 1995-2015 by the mpg123 project
 	free software under the terms of the LGPL 2.1
@@ -17,7 +17,7 @@
  * This should be incremented at least each time a new symbol is added
  * to the header.
  */
-#define MPG123_API_VERSION 43
+#define MPG123_API_VERSION 44
 
 #ifndef MPG123_EXPORT
 /** Defines needed for MS Visual Studio(tm) DLL builds.
@@ -493,6 +493,10 @@ MPG123_EXPORT int mpg123_format_support( mpg123_handle *mh
 ,	long rate, int encoding );
 
 /** Get the current output format written to the addresses given.
+ *  If the stream is freshly loaded, this will try to parse enough
+ *  of it to give you the format to come. This clears the flag that
+ *  would otherwise make the first decoding call return
+ *  MPG123_NEW_FORMAT.
  *  \param mh handle
  *  \param rate sampling rate return address
  *  \param channels channel count return address
@@ -502,6 +506,20 @@ MPG123_EXPORT int mpg123_format_support( mpg123_handle *mh
 MPG123_EXPORT int mpg123_getformat( mpg123_handle *mh
 ,	long *rate, int *channels, int *encoding );
 
+/** Get the current output format written to the addresses given.
+ *  This differs from plain mpg123_getformat() in that you can choose
+ *  _not_ to clear the flag that would trigger the next decoding call
+ *  to return MPG123_NEW_FORMAT in case of a new format arriving.
+ *  \param mh handle
+ *  \param rate sampling rate return address
+ *  \param channels channel count return address
+ *  \param encoding encoding return address
+ *  \param clear_flag if true, clear internal format flag
+ *  \return MPG123_OK on success
+ */
+MPG123_EXPORT int mpg123_getformat2( mpg123_handle *mh
+,	long *rate, int *channels, int *encoding, int clear_flag );
+
 /*@}*/