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diff --git a/src/lib/dl/ext/vorbtool/audio.h b/src/lib/dl/ext/vorbtool/audio.h
new file mode 100755
index 00000000..82448a47
--- /dev/null
+++ b/src/lib/dl/ext/vorbtool/audio.h
@@ -0,0 +1,72 @@
+
+#ifndef __AUDIO_H
+#define __AUDIO_H
+
+#include "encode.h"
+#include <stdio.h>
+
+int setup_resample(oe_enc_opt *opt);
+void clear_resample(oe_enc_opt *opt);
+void setup_downmix(oe_enc_opt *opt);
+void clear_downmix(oe_enc_opt *opt);
+void setup_scaler(oe_enc_opt *opt, float scale);
+void clear_scaler(oe_enc_opt *opt);
+
+typedef struct
+{
+    int (*id_func)(unsigned char *buf, int len); /* Returns true if can load file */
+    int id_data_len; /* Amount of data needed to id whether this can load the file */
+    int (*open_func)(FILE *in, oe_enc_opt *opt, unsigned char *buf, int buflen);
+    void (*close_func)(void *);
+    char *format;
+    char *description;
+} input_format;
+
+
+typedef struct {
+    short format;
+    short channels;
+    int samplerate;
+    int bytespersec;
+    short align;
+    short samplesize;
+    unsigned int mask;
+} wav_fmt;
+
+typedef struct {
+    short channels;
+    short samplesize;
+    long totalsamples;
+    long samplesread;
+    FILE *f;
+    short bigendian;
+        int *channel_permute;
+} wavfile;
+
+typedef struct {
+    short channels;
+    int totalframes;
+    short samplesize;
+    int rate;
+    int offset;
+    int blocksize;
+} aiff_fmt;
+
+typedef wavfile aifffile; /* They're the same */
+
+input_format *open_audio_file(FILE *in, oe_enc_opt *opt);
+
+int raw_open(FILE *in, oe_enc_opt *opt, unsigned char *buf, int buflen);
+int wav_open(FILE *in, oe_enc_opt *opt, unsigned char *buf, int buflen);
+int aiff_open(FILE *in, oe_enc_opt *opt, unsigned char *buf, int buflen);
+int wav_id(unsigned char *buf, int len);
+int aiff_id(unsigned char *buf, int len);
+void wav_close(void *);
+void raw_close(void *);
+
+long wav_read(void *, float **buffer, int samples);
+long wav_ieee_read(void *, float **buffer, int samples);
+long raw_read_stereo(void *, float **buffer, int samples);
+
+#endif /* __AUDIO_H */
+