diff --git a/jni/libsndfile-1.0.25/src/G72x/g723_16.c b/jni/libsndfile-1.0.25/src/G72x/g723_16.c
new file mode 100644
index 0000000..ae90b6c
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+++ b/jni/libsndfile-1.0.25/src/G72x/g723_16.c
@@ -0,0 +1,162 @@
+/*
+ * This source code is a product of Sun Microsystems, Inc. and is provided
+ * for unrestricted use.  Users may copy or modify this source code without
+ * charge.
+ *
+ * SUN SOURCE CODE IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING
+ * THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+ *
+ * Sun source code is provided with no support and without any obligation on
+ * the part of Sun Microsystems, Inc. to assist in its use, correction,
+ * modification or enhancement.
+ *
+ * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+ * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS SOFTWARE
+ * OR ANY PART THEREOF.
+ *
+ * In no event will Sun Microsystems, Inc. be liable for any lost revenue
+ * or profits or other special, indirect and consequential damages, even if
+ * Sun has been advised of the possibility of such damages.
+ *
+ * Sun Microsystems, Inc.
+ * 2550 Garcia Avenue
+ * Mountain View, California  94043
+ */
+/* 16kbps version created, used 24kbps code and changing as little as possible.
+ * G.726 specs are available from ITU's gopher or WWW site (http://www.itu.ch)
+ * If any errors are found, please contact me at mrand@tamu.edu
+ *      -Marc Randolph
+ */
+
+/*
+ * g723_16.c
+ *
+ * Description:
+ *
+ * g723_16_encoder(), g723_16_decoder()
+ *
+ * These routines comprise an implementation of the CCITT G.726 16 Kbps
+ * ADPCM coding algorithm.  Essentially, this implementation is identical to
+ * the bit level description except for a few deviations which take advantage
+ * of workstation attributes, such as hardware 2's complement arithmetic.
+ *
+ */
+
+#include "g72x.h"
+#include "g72x_priv.h"
+
+/*
+ * Maps G.723_16 code word to reconstructed scale factor normalized log
+ * magnitude values.  Comes from Table 11/G.726
+ */
+static short   _dqlntab[4] = { 116, 365, 365, 116}; 
+
+/* Maps G.723_16 code word to log of scale factor multiplier.
+ *
+ * _witab[4] is actually {-22 , 439, 439, -22}, but FILTD wants it
+ * as WI << 5  (multiplied by 32), so we'll do that here 
+ */
+static short   _witab[4] = {-704, 14048, 14048, -704};
+
+/*
+ * Maps G.723_16 code words to a set of values whose long and short
+ * term averages are computed and then compared to give an indication
+ * how stationary (steady state) the signal is.
+ */
+
+/* Comes from FUNCTF */
+static short   _fitab[4] = {0, 0xE00, 0xE00, 0};
+
+/* Comes from quantizer decision level tables (Table 7/G.726)
+ */
+static short qtab_723_16[1] = {261};
+
+
+/*
+ * g723_16_encoder()
+ *
+ * Encodes a linear PCM, A-law or u-law input sample and returns its 2-bit code.
+ * Returns -1 if invalid input coding value.
+ */
+int
+g723_16_encoder(
+       int             sl,
+       G72x_STATE *state_ptr)
+{
+       short           sei, sezi, se, sez;     /* ACCUM */
+       short           d;                      /* SUBTA */
+       short           y;                      /* MIX */
+       short           sr;                     /* ADDB */
+       short           dqsez;                  /* ADDC */
+       short           dq, i;
+
+		/* linearize input sample to 14-bit PCM */
+		sl >>= 2;               /* sl of 14-bit dynamic range */
+
+       sezi = predictor_zero(state_ptr);
+       sez = sezi >> 1;
+       sei = sezi + predictor_pole(state_ptr);
+       se = sei >> 1;                  /* se = estimated signal */
+
+       d = sl - se;                    /* d = estimation diff. */
+
+       /* quantize prediction difference d */
+       y = step_size(state_ptr);       /* quantizer step size */
+       i = quantize(d, y, qtab_723_16, 1);  /* i = ADPCM code */
+
+             /* Since quantize() only produces a three level output
+              * (1, 2, or 3), we must create the fourth one on our own
+              */
+       if (i == 3)                          /* i code for the zero region */
+         if ((d & 0x8000) == 0)             /* If d > 0, i=3 isn't right... */
+           i = 0;
+           
+       dq = reconstruct(i & 2, _dqlntab[i], y); /* quantized diff. */
+
+       sr = (dq < 0) ? se - (dq & 0x3FFF) : se + dq; /* reconstructed signal */
+
+       dqsez = sr + sez - se;          /* pole prediction diff. */
+
+       update(2, y, _witab[i], _fitab[i], dq, sr, dqsez, state_ptr);
+
+       return (i);
+}
+
+/*
+ * g723_16_decoder()
+ *
+ * Decodes a 2-bit CCITT G.723_16 ADPCM code and returns
+ * the resulting 16-bit linear PCM, A-law or u-law sample value.
+ * -1 is returned if the output coding is unknown.
+ */
+int
+g723_16_decoder(
+       int             i,
+       G72x_STATE *state_ptr)
+{
+       short           sezi, sei, sez, se;     /* ACCUM */
+       short           y;                      /* MIX */
+       short           sr;                     /* ADDB */
+       short           dq;
+       short           dqsez;
+
+       i &= 0x03;                      /* mask to get proper bits */
+       sezi = predictor_zero(state_ptr);
+       sez = sezi >> 1;
+       sei = sezi + predictor_pole(state_ptr);
+       se = sei >> 1;                  /* se = estimated signal */
+
+       y = step_size(state_ptr);       /* adaptive quantizer step size */
+       dq = reconstruct(i & 0x02, _dqlntab[i], y); /* unquantize pred diff */
+
+       sr = (dq < 0) ? (se - (dq & 0x3FFF)) : (se + dq); /* reconst. signal */
+
+       dqsez = sr - se + sez;                  /* pole prediction diff. */
+
+       update(2, y, _witab[i], _fitab[i], dq, sr, dqsez, state_ptr);
+
+		/* sr was of 14-bit dynamic range */
+		return (sr << 2);       
+}
+