diff --git a/jni/libsndfile-1.0.25/src/GSM610/gsm_decode.c b/jni/libsndfile-1.0.25/src/GSM610/gsm_decode.c
new file mode 100644
index 0000000..b13308a
--- /dev/null
+++ b/jni/libsndfile-1.0.25/src/GSM610/gsm_decode.c
@@ -0,0 +1,359 @@
+/*
+ * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
+ * Universitaet Berlin.  See the accompanying file "COPYRIGHT" for
+ * details.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
+ */
+
+#include "gsm610_priv.h"
+
+#include "gsm.h"
+
+int gsm_decode (gsm s, gsm_byte * c, gsm_signal * target)
+{
+	word  	LARc[8], Nc[4], Mc[4], bc[4], xmaxc[4], xmc[13*4];
+
+#ifdef WAV49
+	if (s->wav_fmt) {
+
+		uword sr = 0;
+
+		s->frame_index = !s->frame_index;
+		if (s->frame_index) {
+
+			sr = *c++;
+			LARc[0] = sr & 0x3f;  sr >>= 6;
+			sr |= (uword)*c++ << 2;
+			LARc[1] = sr & 0x3f;  sr >>= 6;
+			sr |= (uword)*c++ << 4;
+			LARc[2] = sr & 0x1f;  sr >>= 5;
+			LARc[3] = sr & 0x1f;  sr >>= 5;
+			sr |= (uword)*c++ << 2;
+			LARc[4] = sr & 0xf;  sr >>= 4;
+			LARc[5] = sr & 0xf;  sr >>= 4;
+			sr |= (uword)*c++ << 2;			/* 5 */
+			LARc[6] = sr & 0x7;  sr >>= 3;
+			LARc[7] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 4;
+			Nc[0] = sr & 0x7f;  sr >>= 7;
+			bc[0] = sr & 0x3;  sr >>= 2;
+			Mc[0] = sr & 0x3;  sr >>= 2;
+			sr |= (uword)*c++ << 1;
+			xmaxc[0] = sr & 0x3f;  sr >>= 6;
+			xmc[0] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			xmc[1] = sr & 0x7;  sr >>= 3;
+			xmc[2] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;
+			xmc[3] = sr & 0x7;  sr >>= 3;
+			xmc[4] = sr & 0x7;  sr >>= 3;
+			xmc[5] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;			/* 10 */
+			xmc[6] = sr & 0x7;  sr >>= 3;
+			xmc[7] = sr & 0x7;  sr >>= 3;
+			xmc[8] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			xmc[9] = sr & 0x7;  sr >>= 3;
+			xmc[10] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;
+			xmc[11] = sr & 0x7;  sr >>= 3;
+			xmc[12] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 4;
+			Nc[1] = sr & 0x7f;  sr >>= 7;
+			bc[1] = sr & 0x3;  sr >>= 2;
+			Mc[1] = sr & 0x3;  sr >>= 2;
+			sr |= (uword)*c++ << 1;
+			xmaxc[1] = sr & 0x3f;  sr >>= 6;
+			xmc[13] = sr & 0x7;  sr >>= 3;
+			sr = *c++;				/* 15 */
+			xmc[14] = sr & 0x7;  sr >>= 3;
+			xmc[15] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;
+			xmc[16] = sr & 0x7;  sr >>= 3;
+			xmc[17] = sr & 0x7;  sr >>= 3;
+			xmc[18] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;
+			xmc[19] = sr & 0x7;  sr >>= 3;
+			xmc[20] = sr & 0x7;  sr >>= 3;
+			xmc[21] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			xmc[22] = sr & 0x7;  sr >>= 3;
+			xmc[23] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;
+			xmc[24] = sr & 0x7;  sr >>= 3;
+			xmc[25] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 4;			/* 20 */
+			Nc[2] = sr & 0x7f;  sr >>= 7;
+			bc[2] = sr & 0x3;  sr >>= 2;
+			Mc[2] = sr & 0x3;  sr >>= 2;
+			sr |= (uword)*c++ << 1;
+			xmaxc[2] = sr & 0x3f;  sr >>= 6;
+			xmc[26] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			xmc[27] = sr & 0x7;  sr >>= 3;
+			xmc[28] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;
+			xmc[29] = sr & 0x7;  sr >>= 3;
+			xmc[30] = sr & 0x7;  sr >>= 3;
+			xmc[31] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;
+			xmc[32] = sr & 0x7;  sr >>= 3;
+			xmc[33] = sr & 0x7;  sr >>= 3;
+			xmc[34] = sr & 0x7;  sr >>= 3;
+			sr = *c++;				/* 25 */
+			xmc[35] = sr & 0x7;  sr >>= 3;
+			xmc[36] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;
+			xmc[37] = sr & 0x7;  sr >>= 3;
+			xmc[38] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 4;
+			Nc[3] = sr & 0x7f;  sr >>= 7;
+			bc[3] = sr & 0x3;  sr >>= 2;
+			Mc[3] = sr & 0x3;  sr >>= 2;
+			sr |= (uword)*c++ << 1;
+			xmaxc[3] = sr & 0x3f;  sr >>= 6;
+			xmc[39] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			xmc[40] = sr & 0x7;  sr >>= 3;
+			xmc[41] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;			/* 30 */
+			xmc[42] = sr & 0x7;  sr >>= 3;
+			xmc[43] = sr & 0x7;  sr >>= 3;
+			xmc[44] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;
+			xmc[45] = sr & 0x7;  sr >>= 3;
+			xmc[46] = sr & 0x7;  sr >>= 3;
+			xmc[47] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			xmc[48] = sr & 0x7;  sr >>= 3;
+			xmc[49] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;
+			xmc[50] = sr & 0x7;  sr >>= 3;
+			xmc[51] = sr & 0x7;  sr >>= 3;
+
+			s->frame_chain = sr & 0xf;
+		}
+		else {
+			sr = s->frame_chain;
+			sr |= (uword)*c++ << 4;			/* 1 */
+			LARc[0] = sr & 0x3f;  sr >>= 6;
+			LARc[1] = sr & 0x3f;  sr >>= 6;
+			sr = *c++;
+			LARc[2] = sr & 0x1f;  sr >>= 5;
+			sr |= (uword)*c++ << 3;
+			LARc[3] = sr & 0x1f;  sr >>= 5;
+			LARc[4] = sr & 0xf;  sr >>= 4;
+			sr |= (uword)*c++ << 2;
+			LARc[5] = sr & 0xf;  sr >>= 4;
+			LARc[6] = sr & 0x7;  sr >>= 3;
+			LARc[7] = sr & 0x7;  sr >>= 3;
+			sr = *c++;				/* 5 */
+			Nc[0] = sr & 0x7f;  sr >>= 7;
+			sr |= (uword)*c++ << 1;
+			bc[0] = sr & 0x3;  sr >>= 2;
+			Mc[0] = sr & 0x3;  sr >>= 2;
+			sr |= (uword)*c++ << 5;
+			xmaxc[0] = sr & 0x3f;  sr >>= 6;
+			xmc[0] = sr & 0x7;  sr >>= 3;
+			xmc[1] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;
+			xmc[2] = sr & 0x7;  sr >>= 3;
+			xmc[3] = sr & 0x7;  sr >>= 3;
+			xmc[4] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			xmc[5] = sr & 0x7;  sr >>= 3;
+			xmc[6] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;			/* 10 */
+			xmc[7] = sr & 0x7;  sr >>= 3;
+			xmc[8] = sr & 0x7;  sr >>= 3;
+			xmc[9] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;
+			xmc[10] = sr & 0x7;  sr >>= 3;
+			xmc[11] = sr & 0x7;  sr >>= 3;
+			xmc[12] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			Nc[1] = sr & 0x7f;  sr >>= 7;
+			sr |= (uword)*c++ << 1;
+			bc[1] = sr & 0x3;  sr >>= 2;
+			Mc[1] = sr & 0x3;  sr >>= 2;
+			sr |= (uword)*c++ << 5;
+			xmaxc[1] = sr & 0x3f;  sr >>= 6;
+			xmc[13] = sr & 0x7;  sr >>= 3;
+			xmc[14] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;			/* 15 */
+			xmc[15] = sr & 0x7;  sr >>= 3;
+			xmc[16] = sr & 0x7;  sr >>= 3;
+			xmc[17] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			xmc[18] = sr & 0x7;  sr >>= 3;
+			xmc[19] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;
+			xmc[20] = sr & 0x7;  sr >>= 3;
+			xmc[21] = sr & 0x7;  sr >>= 3;
+			xmc[22] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;
+			xmc[23] = sr & 0x7;  sr >>= 3;
+			xmc[24] = sr & 0x7;  sr >>= 3;
+			xmc[25] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			Nc[2] = sr & 0x7f;  sr >>= 7;
+			sr |= (uword)*c++ << 1;			/* 20 */
+			bc[2] = sr & 0x3;  sr >>= 2;
+			Mc[2] = sr & 0x3;  sr >>= 2;
+			sr |= (uword)*c++ << 5;
+			xmaxc[2] = sr & 0x3f;  sr >>= 6;
+			xmc[26] = sr & 0x7;  sr >>= 3;
+			xmc[27] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;	
+			xmc[28] = sr & 0x7;  sr >>= 3;
+			xmc[29] = sr & 0x7;  sr >>= 3;
+			xmc[30] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			xmc[31] = sr & 0x7;  sr >>= 3;
+			xmc[32] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;
+			xmc[33] = sr & 0x7;  sr >>= 3;
+			xmc[34] = sr & 0x7;  sr >>= 3;
+			xmc[35] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;			/* 25 */
+			xmc[36] = sr & 0x7;  sr >>= 3;
+			xmc[37] = sr & 0x7;  sr >>= 3;
+			xmc[38] = sr & 0x7;  sr >>= 3;
+			sr = *c++;
+			Nc[3] = sr & 0x7f;  sr >>= 7;
+			sr |= (uword)*c++ << 1;		
+			bc[3] = sr & 0x3;  sr >>= 2;
+			Mc[3] = sr & 0x3;  sr >>= 2;
+			sr |= (uword)*c++ << 5;
+			xmaxc[3] = sr & 0x3f;  sr >>= 6;
+			xmc[39] = sr & 0x7;  sr >>= 3;
+			xmc[40] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;
+			xmc[41] = sr & 0x7;  sr >>= 3;
+			xmc[42] = sr & 0x7;  sr >>= 3;
+			xmc[43] = sr & 0x7;  sr >>= 3;
+			sr = *c++;				/* 30 */
+			xmc[44] = sr & 0x7;  sr >>= 3;
+			xmc[45] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 2;
+			xmc[46] = sr & 0x7;  sr >>= 3;
+			xmc[47] = sr & 0x7;  sr >>= 3;
+			xmc[48] = sr & 0x7;  sr >>= 3;
+			sr |= (uword)*c++ << 1;
+			xmc[49] = sr & 0x7;  sr >>= 3;
+			xmc[50] = sr & 0x7;  sr >>= 3;
+			xmc[51] = sr & 0x7;  sr >>= 3;
+		}
+	}
+	else
+#endif
+	{
+		/* GSM_MAGIC  = (*c >> 4) & 0xF; */
+
+		if (((*c >> 4) & 0x0F) != GSM_MAGIC) return -1;
+
+		LARc[0]  = (*c++ & 0xF) << 2;		/* 1 */
+		LARc[0] |= (*c >> 6) & 0x3;
+		LARc[1]  = *c++ & 0x3F;
+		LARc[2]  = (*c >> 3) & 0x1F;
+		LARc[3]  = (*c++ & 0x7) << 2;
+		LARc[3] |= (*c >> 6) & 0x3;
+		LARc[4]  = (*c >> 2) & 0xF;
+		LARc[5]  = (*c++ & 0x3) << 2;
+		LARc[5] |= (*c >> 6) & 0x3;
+		LARc[6]  = (*c >> 3) & 0x7;
+		LARc[7]  = *c++ & 0x7;
+		Nc[0]  = (*c >> 1) & 0x7F;
+		bc[0]  = (*c++ & 0x1) << 1;
+		bc[0] |= (*c >> 7) & 0x1;
+		Mc[0]  = (*c >> 5) & 0x3;
+		xmaxc[0]  = (*c++ & 0x1F) << 1;
+		xmaxc[0] |= (*c >> 7) & 0x1;
+		xmc[0]  = (*c >> 4) & 0x7;
+		xmc[1]  = (*c >> 1) & 0x7;
+		xmc[2]  = (*c++ & 0x1) << 2;
+		xmc[2] |= (*c >> 6) & 0x3;
+		xmc[3]  = (*c >> 3) & 0x7;
+		xmc[4]  = *c++ & 0x7;
+		xmc[5]  = (*c >> 5) & 0x7;
+		xmc[6]  = (*c >> 2) & 0x7;
+		xmc[7]  = (*c++ & 0x3) << 1;		/* 10 */
+		xmc[7] |= (*c >> 7) & 0x1;
+		xmc[8]  = (*c >> 4) & 0x7;
+		xmc[9]  = (*c >> 1) & 0x7;
+		xmc[10]  = (*c++ & 0x1) << 2;
+		xmc[10] |= (*c >> 6) & 0x3;
+		xmc[11]  = (*c >> 3) & 0x7;
+		xmc[12]  = *c++ & 0x7;
+		Nc[1]  = (*c >> 1) & 0x7F;
+		bc[1]  = (*c++ & 0x1) << 1;
+		bc[1] |= (*c >> 7) & 0x1;
+		Mc[1]  = (*c >> 5) & 0x3;
+		xmaxc[1]  = (*c++ & 0x1F) << 1;
+		xmaxc[1] |= (*c >> 7) & 0x1;
+		xmc[13]  = (*c >> 4) & 0x7;
+		xmc[14]  = (*c >> 1) & 0x7;
+		xmc[15]  = (*c++ & 0x1) << 2;
+		xmc[15] |= (*c >> 6) & 0x3;
+		xmc[16]  = (*c >> 3) & 0x7;
+		xmc[17]  = *c++ & 0x7;
+		xmc[18]  = (*c >> 5) & 0x7;
+		xmc[19]  = (*c >> 2) & 0x7;
+		xmc[20]  = (*c++ & 0x3) << 1;
+		xmc[20] |= (*c >> 7) & 0x1;
+		xmc[21]  = (*c >> 4) & 0x7;
+		xmc[22]  = (*c >> 1) & 0x7;
+		xmc[23]  = (*c++ & 0x1) << 2;
+		xmc[23] |= (*c >> 6) & 0x3;
+		xmc[24]  = (*c >> 3) & 0x7;
+		xmc[25]  = *c++ & 0x7;
+		Nc[2]  = (*c >> 1) & 0x7F;
+		bc[2]  = (*c++ & 0x1) << 1;		/* 20 */
+		bc[2] |= (*c >> 7) & 0x1;
+		Mc[2]  = (*c >> 5) & 0x3;
+		xmaxc[2]  = (*c++ & 0x1F) << 1;
+		xmaxc[2] |= (*c >> 7) & 0x1;
+		xmc[26]  = (*c >> 4) & 0x7;
+		xmc[27]  = (*c >> 1) & 0x7;
+		xmc[28]  = (*c++ & 0x1) << 2;
+		xmc[28] |= (*c >> 6) & 0x3;
+		xmc[29]  = (*c >> 3) & 0x7;
+		xmc[30]  = *c++ & 0x7;
+		xmc[31]  = (*c >> 5) & 0x7;
+		xmc[32]  = (*c >> 2) & 0x7;
+		xmc[33]  = (*c++ & 0x3) << 1;
+		xmc[33] |= (*c >> 7) & 0x1;
+		xmc[34]  = (*c >> 4) & 0x7;
+		xmc[35]  = (*c >> 1) & 0x7;
+		xmc[36]  = (*c++ & 0x1) << 2;
+		xmc[36] |= (*c >> 6) & 0x3;
+		xmc[37]  = (*c >> 3) & 0x7;
+		xmc[38]  = *c++ & 0x7;
+		Nc[3]  = (*c >> 1) & 0x7F;
+		bc[3]  = (*c++ & 0x1) << 1;
+		bc[3] |= (*c >> 7) & 0x1;
+		Mc[3]  = (*c >> 5) & 0x3;
+		xmaxc[3]  = (*c++ & 0x1F) << 1;
+		xmaxc[3] |= (*c >> 7) & 0x1;
+		xmc[39]  = (*c >> 4) & 0x7;
+		xmc[40]  = (*c >> 1) & 0x7;
+		xmc[41]  = (*c++ & 0x1) << 2;
+		xmc[41] |= (*c >> 6) & 0x3;
+		xmc[42]  = (*c >> 3) & 0x7;
+		xmc[43]  = *c++ & 0x7;			/* 30  */
+		xmc[44]  = (*c >> 5) & 0x7;
+		xmc[45]  = (*c >> 2) & 0x7;
+		xmc[46]  = (*c++ & 0x3) << 1;
+		xmc[46] |= (*c >> 7) & 0x1;
+		xmc[47]  = (*c >> 4) & 0x7;
+		xmc[48]  = (*c >> 1) & 0x7;
+		xmc[49]  = (*c++ & 0x1) << 2;
+		xmc[49] |= (*c >> 6) & 0x3;
+		xmc[50]  = (*c >> 3) & 0x7;
+		xmc[51]  = *c & 0x7;			/* 33 */
+	}
+
+	Gsm_Decoder(s, LARc, Nc, bc, Mc, xmaxc, xmc, target);
+
+	return 0;
+}
+