diff --git a/jni/libsamplerate-0.1.8/src/src_zoh.c b/jni/libsamplerate-0.1.8/src/src_zoh.c
new file mode 100644
index 0000000..226d38a
--- /dev/null
+++ b/jni/libsamplerate-0.1.8/src/src_zoh.c
@@ -0,0 +1,211 @@
+/*
+** Copyright (C) 2002-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program 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 General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+/*
+** This code is part of Secret Rabbit Code aka libsamplerate. A commercial
+** use license for this code is available, please see:
+**		http://www.mega-nerd.com/SRC/procedure.html
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "config.h"
+#include "float_cast.h"
+#include "common.h"
+
+static int zoh_vari_process (SRC_PRIVATE *psrc, SRC_DATA *data) ;
+static void zoh_reset (SRC_PRIVATE *psrc) ;
+
+/*========================================================================================
+*/
+
+#define	ZOH_MAGIC_MARKER	MAKE_MAGIC ('s', 'r', 'c', 'z', 'o', 'h')
+
+typedef struct
+{	int		zoh_magic_marker ;
+	int		channels ;
+	int		reset ;
+	long	in_count, in_used ;
+	long	out_count, out_gen ;
+	float	last_value [1] ;
+} ZOH_DATA ;
+
+/*----------------------------------------------------------------------------------------
+*/
+
+static int
+zoh_vari_process (SRC_PRIVATE *psrc, SRC_DATA *data)
+{	ZOH_DATA 	*priv ;
+	double		src_ratio, input_index, rem ;
+	int			ch ;
+
+	if (data->input_frames <= 0)
+		return SRC_ERR_NO_ERROR ;
+
+	if (psrc->private_data == NULL)
+		return SRC_ERR_NO_PRIVATE ;
+
+	priv = (ZOH_DATA*) psrc->private_data ;
+
+	if (priv->reset)
+	{	/* If we have just been reset, set the last_value data. */
+		for (ch = 0 ; ch < priv->channels ; ch++)
+			priv->last_value [ch] = data->data_in [ch] ;
+		priv->reset = 0 ;
+		} ;
+
+	priv->in_count = data->input_frames * priv->channels ;
+	priv->out_count = data->output_frames * priv->channels ;
+	priv->in_used = priv->out_gen = 0 ;
+
+	src_ratio = psrc->last_ratio ;
+	input_index = psrc->last_position ;
+
+	/* Calculate samples before first sample in input array. */
+	while (input_index < 1.0 && priv->out_gen < priv->out_count)
+	{
+		if (priv->in_used + priv->channels * input_index >= priv->in_count)
+			break ;
+
+		if (priv->out_count > 0 && fabs (psrc->last_ratio - data->src_ratio) > SRC_MIN_RATIO_DIFF)
+			src_ratio = psrc->last_ratio + priv->out_gen * (data->src_ratio - psrc->last_ratio) / priv->out_count ;
+
+		for (ch = 0 ; ch < priv->channels ; ch++)
+		{	data->data_out [priv->out_gen] = priv->last_value [ch] ;
+			priv->out_gen ++ ;
+			} ;
+
+		/* Figure out the next index. */
+		input_index += 1.0 / src_ratio ;
+		} ;
+
+	rem = fmod_one (input_index) ;
+	priv->in_used += priv->channels * lrint (input_index - rem) ;
+	input_index = rem ;
+
+	/* Main processing loop. */
+	while (priv->out_gen < priv->out_count && priv->in_used + priv->channels * input_index <= priv->in_count)
+	{
+		if (priv->out_count > 0 && fabs (psrc->last_ratio - data->src_ratio) > SRC_MIN_RATIO_DIFF)
+			src_ratio = psrc->last_ratio + priv->out_gen * (data->src_ratio - psrc->last_ratio) / priv->out_count ;
+
+		for (ch = 0 ; ch < priv->channels ; ch++)
+		{	data->data_out [priv->out_gen] = data->data_in [priv->in_used - priv->channels + ch] ;
+			priv->out_gen ++ ;
+			} ;
+
+		/* Figure out the next index. */
+		input_index += 1.0 / src_ratio ;
+		rem = fmod_one (input_index) ;
+
+		priv->in_used += priv->channels * lrint (input_index - rem) ;
+		input_index = rem ;
+		} ;
+
+	if (priv->in_used > priv->in_count)
+	{	input_index += (priv->in_used - priv->in_count) / priv->channels ;
+		priv->in_used = priv->in_count ;
+		} ;
+
+	psrc->last_position = input_index ;
+
+	if (priv->in_used > 0)
+		for (ch = 0 ; ch < priv->channels ; ch++)
+			priv->last_value [ch] = data->data_in [priv->in_used - priv->channels + ch] ;
+
+	/* Save current ratio rather then target ratio. */
+	psrc->last_ratio = src_ratio ;
+
+	data->input_frames_used = priv->in_used / priv->channels ;
+	data->output_frames_gen = priv->out_gen / priv->channels ;
+
+	return SRC_ERR_NO_ERROR ;
+} /* zoh_vari_process */
+
+/*------------------------------------------------------------------------------
+*/
+
+const char*
+zoh_get_name (int src_enum)
+{
+	if (src_enum == SRC_ZERO_ORDER_HOLD)
+		return "ZOH Interpolator" ;
+
+	return NULL ;
+} /* zoh_get_name */
+
+const char*
+zoh_get_description (int src_enum)
+{
+	if (src_enum == SRC_ZERO_ORDER_HOLD)
+		return "Zero order hold interpolator, very fast, poor quality." ;
+
+	return NULL ;
+} /* zoh_get_descrition */
+
+int
+zoh_set_converter (SRC_PRIVATE *psrc, int src_enum)
+{	ZOH_DATA *priv = NULL ;
+
+	if (src_enum != SRC_ZERO_ORDER_HOLD)
+		return SRC_ERR_BAD_CONVERTER ;
+
+	if (psrc->private_data != NULL)
+	{	free (psrc->private_data) ;
+		psrc->private_data = NULL ;
+		} ;
+
+	if (psrc->private_data == NULL)
+	{	priv = calloc (1, sizeof (*priv) + psrc->channels * sizeof (float)) ;
+		if (priv == NULL)
+			return SRC_ERR_MALLOC_FAILED ;
+		psrc->private_data = priv ;
+		} ;
+
+	priv->zoh_magic_marker = ZOH_MAGIC_MARKER ;
+	priv->channels = psrc->channels ;
+
+	psrc->const_process = zoh_vari_process ;
+	psrc->vari_process = zoh_vari_process ;
+	psrc->reset = zoh_reset ;
+
+	zoh_reset (psrc) ;
+
+	return SRC_ERR_NO_ERROR ;
+} /* zoh_set_converter */
+
+/*===================================================================================
+*/
+
+static void
+zoh_reset (SRC_PRIVATE *psrc)
+{	ZOH_DATA *priv ;
+
+	priv = (ZOH_DATA*) psrc->private_data ;
+	if (priv == NULL)
+		return ;
+
+	priv->channels = psrc->channels ;
+	priv->reset = 1 ;
+	memset (priv->last_value, 0, sizeof (priv->last_value [0]) * priv->channels) ;
+
+	return ;
+} /* zoh_reset */
+