From 9e20edb51e8a83f6ffcf48cda77d934bf30a7702 Mon Sep 17 00:00:00 2001
From: Erik de Castro Lopo <erikd@coltrane>
Date: Sun, 31 Oct 2004 12:48:25 +0000
Subject: [PATCH] Add SFC_GET_LOOP_INFO and SF_LOOP_INFO struct.

---
 src/sndfile.h.in | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/sndfile.h.in b/src/sndfile.h.in
index d5b19049..58fe5de9 100644
--- a/src/sndfile.h.in
+++ b/src/sndfile.h.in
@@ -171,6 +171,8 @@ enum
 	SFC_GET_INSTRUMENT				= 0x10D0,
 	SFC_SET_INSTRUMENT				= 0x10D1,
 
+	SFC_GET_LOOP_INFO				= 0x10E0,
+
 	/* Following commands for testing only. */
 	SFC_TEST_IEEE_FLOAT_REPLACE		= 0x6001,
 
@@ -236,7 +238,7 @@ enum
 typedef	struct SNDFILE_tag	SNDFILE ;
 
 /* The following typedef is system specific and is defined when libsndfile is.
-** compiled. sf_count_t can be one of loff_t (Linux), off_t (*BSD), 
+** compiled. sf_count_t can be one of loff_t (Linux), off_t (*BSD),
 ** off64_t (Solaris), __int64_t (Win32) etc.
 */
 
@@ -327,6 +329,25 @@ enum
 	SF_LOOP_BACKWARD
 } ;
 
+/* Struct used to retrieve loop information from a file.*/
+typedef struct
+{
+	short	time_sig_num ;	/* any positive integer    >0  */
+	short	time_sig_den ;	/* any positive power of 2 >0  */
+	int		loop_mode ;		/* see SF_LOOP enum            */
+
+	int		num_beats ;		/* this is NOT the amount of quarter notes !!!*/
+							/* a full bar of 4/4 is 4 beats */
+							/* a full bar of 7/8 is 7 beats */
+
+	float	bpm ;			/* suggestion, as it can be calculated using other fields:*/
+							/* file's lenght, file's sampleRate and our time_sig_den*/
+							/* -> bpms are always the amount of _quarter notes_ per minute */
+
+	int	root_key ;			/* MIDI note, or -1 for None */
+	int future [6] ;
+} SF_LOOP_INFO ;
+
 /* Open the specified file for read, write or both. On error, this will
 ** return a NULL pointer. To find the error number, pass a NULL SNDFILE
 ** to sf_perror () or sf_error_str ().