Update FLAC to 1.3.1

include/FLAC/format.h

Index: include/FLAC/format.h
diff --git a/include/FLAC/format.h b/include/FLAC/format.h
index 77e2d0130e5d66d10d453937ae0b63df87bdba4e..7424565b3b395d6a9c1a8ab94652a3c2c129aedc 100644
--- a/include/FLAC/format.h
+++ b/include/FLAC/format.h
@@ -1,5 +1,6 @@
 /* libFLAC - Free Lossless Audio Codec library
- * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007  Josh Coalson
+ * Copyright (C) 2000-2009  Josh Coalson
+ * Copyright (C) 2011-2014  Xiph.Org Foundation
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -508,9 +509,11 @@ typedef enum {
 	FLAC__METADATA_TYPE_PICTURE = 6,
 	/**< <A HREF="../format.html#metadata_block_picture">PICTURE</A> block */
 
-	FLAC__METADATA_TYPE_UNDEFINED = 7
+	FLAC__METADATA_TYPE_UNDEFINED = 7,
 	/**< marker to denote beginning of undefined type range; this number will increase as new metadata types are added */
 
+        FLAC__MAX_METADATA_TYPE = FLAC__MAX_METADATA_TYPE_CODE,
+        /**< No type will ever be greater than this. There is not enough room in the protocol block. */
 } FLAC__MetadataType;
 
 /** Maps a FLAC__MetadataType to a C string.
@@ -879,6 +882,18 @@ extern FLAC_API const unsigned FLAC__STREAM_METADATA_LENGTH_LEN; /**< == 24 (bit
  */
 FLAC_API FLAC__bool FLAC__format_sample_rate_is_valid(unsigned sample_rate);
 
+/** Tests that a blocksize at the given sample rate is valid for the FLAC
+ *  subset.
+ *
+ * \param blocksize    The blocksize to test for compliance.
+ * \param sample_rate  The sample rate is needed, since the valid subset
+ *                     blocksize depends on the sample rate.
+ * \retval FLAC__bool
+ *    \c true if the given blocksize conforms to the specification for the
+ *    subset at the given sample rate, else \c false.
+ */
+FLAC_API FLAC__bool FLAC__format_blocksize_is_subset(unsigned blocksize, unsigned sample_rate);
+
 /** Tests that a sample rate is valid for the FLAC subset.  The subset rules
  *  for valid sample rates are slightly more complex since the rate has to
  *  be expressible completely in the frame header.