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diff --git a/libs/fluidsynth/src/fluid_sffile.h b/libs/fluidsynth/src/fluid_sffile.h
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+++ b/libs/fluidsynth/src/fluid_sffile.h
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+/* FluidSynth - A Software Synthesizer
+ *
+ * Copyright (C) 2003  Peter Hanappe and others.
+ *
+ * SoundFont loading code borrowed from Smurf SoundFont Editor by Josh Green
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+
+#ifndef _FLUID_SFFILE_H
+#define _FLUID_SFFILE_H
+
+
+#include "fluid_gen.h"
+#include "fluid_list.h"
+#include "fluid_mod.h"
+#include "fluidsynth.h"
+#include "fluidsynth_priv.h"
+
+
+/* Sound Font structure defines */
+
+/* Forward declarations */
+typedef union _SFGenAmount SFGenAmount;
+typedef struct _SFVersion SFVersion;
+typedef struct _SFMod SFMod;
+typedef struct _SFGen SFGen;
+typedef struct _SFZone SFZone;
+typedef struct _SFSample SFSample;
+typedef struct _SFInst SFInst;
+typedef struct _SFPreset SFPreset;
+typedef struct _SFData SFData;
+typedef struct _SFChunk SFChunk;
+typedef struct _SFPhdr SFPhdr;
+typedef struct _SFBag SFBag;
+typedef struct _SFIhdr SFIhdr;
+typedef struct _SFShdr SFShdr;
+
+
+struct _SFVersion
+{
+    /* version structure */
+    unsigned short major;
+    unsigned short minor;
+};
+
+struct _SFMod
+{
+    /* Modulator structure */
+    unsigned short src; /* source modulator */
+    unsigned short dest; /* destination generator */
+    signed short amount; /* signed, degree of modulation */
+    unsigned short amtsrc; /* second source controls amnt of first */
+    unsigned short trans; /* transform applied to source */
+};
+
+union _SFGenAmount   /* Generator amount structure */
+{
+    signed short sword; /* signed 16 bit value */
+    unsigned short uword; /* unsigned 16 bit value */
+    struct
+    {
+        unsigned char lo; /* low value for ranges */
+        unsigned char hi; /* high value for ranges */
+    } range;
+};
+
+struct _SFGen
+{
+    /* Generator structure */
+    unsigned short id; /* generator ID */
+    SFGenAmount amount; /* generator value */
+};
+
+struct _SFZone
+{
+    /* Sample/instrument zone structure */
+    fluid_list_t *instsamp; /* instrument/sample pointer for zone */
+    fluid_list_t *gen; /* list of generators */
+    fluid_list_t *mod; /* list of modulators */
+};
+
+struct _SFSample
+{
+    /* Sample structure */
+    char name[21]; /* Name of sample */
+    unsigned char samfile; /* Loaded sfont/sample buffer = 0/1 */
+    unsigned int start; /* Offset in sample area to start of sample */
+    unsigned int end; /* Offset from start to end of sample,
+             this is the last point of the
+             sample, the SF spec has this as the
+             1st point after, corrected on
+             load/save */
+    unsigned int loopstart; /* Offset from start to start of loop */
+    unsigned int loopend; /* Offset from start to end of loop,
+                 marks the first point after loop,
+                 whose sample value is ideally
+                 equivalent to loopstart */
+    unsigned int samplerate; /* Sample rate recorded at */
+    unsigned char origpitch; /* root midi key number */
+    signed char pitchadj; /* pitch correction in cents */
+    unsigned short sampletype; /* 1 mono,2 right,4 left,linked 8,0x8000=ROM */
+    fluid_sample_t *fluid_sample; /* Imported sample (fixed up in fluid_defsfont_load) */
+};
+
+struct _SFInst
+{
+    /* Instrument structure */
+    char name[21]; /* Name of instrument */
+    int idx; /* Index of this instrument in the Soundfont */
+    fluid_list_t *zone; /* list of instrument zones */
+};
+
+struct _SFPreset
+{
+    /* Preset structure */
+    char name[21]; /* preset name */
+    unsigned short prenum; /* preset number */
+    unsigned short bank; /* bank number */
+    unsigned int libr; /* Not used (preserved) */
+    unsigned int genre; /* Not used (preserved) */
+    unsigned int morph; /* Not used (preserved) */
+    fluid_list_t *zone; /* list of preset zones */
+};
+
+/* NOTE: sffd is also used to determine if sound font is new (NULL) */
+struct _SFData
+{
+    /* Sound font data structure */
+    SFVersion version; /* sound font version */
+    SFVersion romver; /* ROM version */
+
+    unsigned int filesize;
+
+    unsigned int samplepos; /* position within sffd of the sample chunk */
+    unsigned int samplesize; /* length within sffd of the sample chunk */
+
+    unsigned int sample24pos; /* position within sffd of the sm24 chunk, set to zero if no 24 bit
+                                 sample support */
+    unsigned int sample24size; /* length within sffd of the sm24 chunk */
+
+    unsigned int hydrapos;
+    unsigned int hydrasize;
+
+    char *fname; /* file name */
+    FILE *sffd; /* loaded sfont file descriptor */
+    const fluid_file_callbacks_t *fcbs; /* file callbacks used to read this file */
+
+    fluid_list_t *info; /* linked list of info strings (1st byte is ID) */
+    fluid_list_t *preset; /* linked list of preset info */
+    fluid_list_t *inst; /* linked list of instrument info */
+    fluid_list_t *sample; /* linked list of sample info */
+};
+
+/* functions */
+
+
+/*-----------------------------------sffile.h----------------------------*/
+/*
+   File structures and routines (used to be in sffile.h)
+*/
+
+/* sfont file data structures */
+struct _SFChunk
+{
+    /* RIFF file chunk structure */
+    unsigned int id; /* chunk id */
+    unsigned int size; /* size of the following chunk */
+};
+
+struct _SFPhdr
+{
+    unsigned char name[20]; /* preset name */
+    unsigned short preset; /* preset number */
+    unsigned short bank; /* bank number */
+    unsigned short pbagndx; /* index into preset bag */
+    unsigned int library; /* just for preserving them */
+    unsigned int genre; /* Not used */
+    unsigned int morphology; /* Not used */
+};
+
+struct _SFBag
+{
+    unsigned short genndx; /* index into generator list */
+    unsigned short modndx; /* index into modulator list */
+};
+
+struct _SFIhdr
+{
+    char name[20]; /* Name of instrument */
+    unsigned short ibagndx; /* Instrument bag index */
+};
+
+struct _SFShdr
+{
+    /* Sample header loading struct */
+    char name[20]; /* Sample name */
+    unsigned int start; /* Offset to start of sample */
+    unsigned int end; /* Offset to end of sample */
+    unsigned int loopstart; /* Offset to start of loop */
+    unsigned int loopend; /* Offset to end of loop */
+    unsigned int samplerate; /* Sample rate recorded at */
+    unsigned char origpitch; /* root midi key number */
+    signed char pitchadj; /* pitch correction in cents */
+    unsigned short samplelink; /* Not used */
+    unsigned short sampletype; /* 1 mono,2 right,4 left,linked 8,0x8000=ROM */
+};
+
+/* Public functions  */
+SFData *fluid_sffile_open(const char *fname, const fluid_file_callbacks_t *fcbs);
+void fluid_sffile_close(SFData *sf);
+int fluid_sffile_parse_presets(SFData *sf);
+int fluid_sffile_read_sample_data(SFData *sf, unsigned int sample_start, unsigned int sample_end,
+                                  int sample_type, short **data, char **data24);
+
+#endif /* _FLUID_SFFILE_H */