Added CRI ADX detection. (David Korth)

diff --git a/magic/Magdir/audio b/magic/Magdir/audio
index e12ef6881216106cdb1b6d61e159df6d58787d0f..b1756adfefb3d8b48b86c36ef01b5c25616e819b 100644 (file)
--- a/magic/Magdir/audio
+++ b/magic/Magdir/audio
@@ -1,6 +1,6 @@
 
 #------------------------------------------------------------------------------
-# $File: audio,v 1.86 2018/03/11 00:53:11 christos Exp $
+# $File: audio,v 1.87 2018/06/23 16:36:04 christos Exp $
 # audio:  file(1) magic for sound formats (see also "iff")
 #
 # Jan Nicolai Langfeldt (janl@ifi.uio.no), Dan Quinlan (quinlan@yggdrasil.com),
@@ -858,3 +858,23 @@
 2      string  ADLIB-          AdLib instrument data
 >0     byte    x               \b, version %u
 >1     byte    x               \b.%u
+
+# CRI ADX ADPCM audio
+# Used by various Sega games.
+# https://en.wikipedia.org/wiki/ADX_(file_format)
+# https://wiki.multimedia.cx/index.php/CRI_ADX_file
+# Added by David Korth <gerbilsoft@gerbilsoft.com>
+0x00           beshort 0x8000
+>(2.S-2)       string  (c)CRI          CRI ADX ADPCM audio
+>>0x12         byte    x               v%u
+>>0x04         byte    0x02            \b, pre-set prediction coefficients
+>>0x04         byte    0x03            \b, standard ADX
+>>0x04         byte    0x04            \b, exponential scale
+>>0x04         byte    0x05            \b, AHX
+>>0x08         belong  x               \b, %u Hz
+>>0x12         byte    0x03
+>>>0x02                beshort >0x2B
+>>>>0x18       belong  !0              \b, looping
+>>0x12         byte    0x04
+>>>0x02                beshort >0x37
+>>>>0x24       belong  !0              \b, looping