├── .classpath
├── .gitignore
├── .project
├── AndroidManifest.xml
├── INSTALL
├── LICENSE
├── README
├── TODO
├── build.xml
├── default.properties
├── jni
    ├── Android.mk
    ├── Application.mk
    └── resample
    │   ├── Android.mk
    │   ├── resample-interface.c
    │   ├── resample-interface.h
    │   ├── resample.c
    │   └── resample.h
├── proguard.cfg
├── res
    └── values
    │   └── strings.xml
└── src
    └── net
        └── sourceforge
            └── resample
                └── Resample.java


/.classpath:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <classpath>
3 | 	<classpathentry kind="src" path="src"/>
4 | 	<classpathentry kind="src" path="gen"/>
5 | 	<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
6 | 	<classpathentry kind="output" path="bin"/>
7 | </classpath>
8 | 


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
 1 | bin/*
 2 | gen/*
 3 | libs/armeabi*
 4 | obj/*
 5 | keys
 6 | market/*
 7 | *.apk
 8 | *.iws
 9 | *.ipr
10 | *.iml
11 | local.properties
12 | 


--------------------------------------------------------------------------------
/.project:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <projectDescription>
 3 | 	<name>libresample</name>
 4 | 	<comment></comment>
 5 | 	<projects>
 6 | 	</projects>
 7 | 	<buildSpec>
 8 | 		<buildCommand>
 9 | 			<name>com.android.ide.eclipse.adt.ResourceManagerBuilder</name>
10 | 			<arguments>
11 | 			</arguments>
12 | 		</buildCommand>
13 | 		<buildCommand>
14 | 			<name>com.android.ide.eclipse.adt.PreCompilerBuilder</name>
15 | 			<arguments>
16 | 			</arguments>
17 | 		</buildCommand>
18 | 		<buildCommand>
19 | 			<name>org.eclipse.jdt.core.javabuilder</name>
20 | 			<arguments>
21 | 			</arguments>
22 | 		</buildCommand>
23 | 		<buildCommand>
24 | 			<name>com.android.ide.eclipse.adt.ApkBuilder</name>
25 | 			<arguments>
26 | 			</arguments>
27 | 		</buildCommand>
28 | 	</buildSpec>
29 | 	<natures>
30 | 		<nature>com.android.ide.eclipse.adt.AndroidNature</nature>
31 | 		<nature>org.eclipse.jdt.core.javanature</nature>
32 | 	</natures>
33 | </projectDescription>
34 | 


--------------------------------------------------------------------------------
/AndroidManifest.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3 |       package="net.sourceforge.autotalent"
 4 |       android:versionCode="1"
 5 |       android:versionName="0.01">
 6 |     <uses-sdk android:minSdkVersion="4" />
 7 | 
 8 |     <application>
 9 | 
10 | 
11 |     </application>
12 | </manifest>


--------------------------------------------------------------------------------
/INSTALL:
--------------------------------------------------------------------------------
 1 | This project requires:
 2 | Android SDK
 3 | Android NDK
 4 | 
 5 | This project does not contain the shared libraries for LAME.
 6 | In order to build them, you must first install the Android NDK from:
 7 | http://developer.android.com/sdk/ndk/index.html
 8 | Installing the Android NDK is beyond the scope of this INSTALL file.
 9 | 
10 | To build the libraries you must go to /path/to/libresample and issue the command:
11 | /path/to/ndk-build 
12 | 
13 | The NDK builder will compile the shared libraries and place them in the 
14 | libresample/libs directory for use by other dependant projects.
15 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
/README:
--------------------------------------------------------------------------------
 1 | This project is licensed under LGPLv2.1, for further licensing information see
 2 | the LICENSE file.
 3 | 
 4 | Build Instructions:
 5 | For help building the native resample library, please consult the INSTALL file.
 6 | 
 7 | Known Issues:
 8 | 
 9 | This project is based off libresample and resample available from:
10 | https://ccrma.stanford.edu/~jos/resample/Free_Resampling_Software.html
11 | 


--------------------------------------------------------------------------------
/TODO:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/intervigilium/libresample/804018847a4eecc400a7c31a10f6b510abcbedff/TODO


--------------------------------------------------------------------------------
/build.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <project name="libresample">
 3 | 
 4 | <!-- The local.properties file is created and updated by the 'android'
 5 |      tool.
 6 |      It contains the path to the SDK. It should *NOT* be checked into
 7 |      Version Control Systems. -->
 8 |     <property file="local.properties" />
 9 | 
10 |     <!-- The build.properties file can be created by you and is never touched
11 |          by the 'android' tool. This is the place to change some of the
12 |          default property values used by the Ant rules.
13 |          Here are some properties you may want to change/update:
14 | 
15 |          source.dir
16 |              The name of the source directory. Default is 'src'.
17 |          out.dir
18 |              The name of the output directory. Default is 'bin'.
19 | 
20 |          Properties related to the SDK location or the project target should
21 |          be updated using the 'android' tool with the 'update' action.
22 | 
23 |          This file is an integral part of the build system for your
24 |          application and should be checked into Version Control Systems.
25 | 
26 |          -->
27 |     <property file="build.properties" />
28 | 
29 |     <!-- The default.properties file is created and updated by the 'android'
30 |          tool, as well as ADT.
31 |          This file is an integral part of the build system for your
32 |          application and should be checked into Version Control Systems. -->
33 |     <property file="default.properties" />
34 |     <property name="bash" location="${bash.dir}/bash" />
35 |     <property name="ndk-build" value="${ndk.dir}/ndk-build" />
36 | 
37 |     <!-- Required pre-setup import -->
38 |     <import file="${sdk.dir}/tools/ant/pre_setup.xml" />
39 | 
40 | 
41 | <!-- extension targets. Uncomment the ones where you want to do custom work
42 |      in between standard targets -->
43 |     <target name="-pre-build">
44 |         <exec dir="${basedir}" executable="${bash}">
45 |             <arg line="${ndk-build}" />
46 |         </exec>
47 |     </target>
48 |     <!--
49 |     <target name="-pre-compile">
50 |     </target>
51 | 
52 |     [This is typically used for code obfuscation.
53 |      Compiled code location: ${out.classes.absolute.dir}
54 |      If this is not done in place, override ${out.dex.input.absolute.dir}]
55 |     <target name="-post-compile">
56 |     </target>
57 |     -->
58 | 
59 |     <!-- Execute the Android Setup task that will setup some properties
60 |          specific to the target, and import the build rules files.
61 | 
62 |          The rules file is imported from
63 |             <SDK>/tools/ant/
64 |          Depending on the project type it can be either:
65 |          - main_rules.xml
66 |          - lib_rules.xml
67 |          - test_rules.xml
68 | 
69 |          To customize existing targets, there are two options:
70 |          - Customize only one target:
71 |              - copy/paste the target into this file, *before* the
72 |                <setup> task.
73 |              - customize it to your needs.
74 |          - Customize the whole script.
75 |              - copy/paste the content of the rules files (minus the top node)
76 |                into this file, *after* the <setup> task
77 |              - disable the import of the rules by changing the setup task
78 |                below to <setup import="false" />.
79 |              - customize to your needs.
80 |     -->
81 |     <setup />
82 | 
83 | </project>
84 | 


--------------------------------------------------------------------------------
/default.properties:
--------------------------------------------------------------------------------
 1 | # This file is automatically generated by Android Tools.
 2 | # Do not modify this file -- YOUR CHANGES WILL BE ERASED!
 3 | #
 4 | # This file must be checked in Version Control Systems.
 5 | #
 6 | # To customize properties used by the Ant build system use,
 7 | # "build.properties", and override values to adapt the script to your
 8 | # project structure.
 9 | 
10 | # Project target.
11 | target=android-10
12 | android.library=true
13 | 


--------------------------------------------------------------------------------
/jni/Android.mk:
--------------------------------------------------------------------------------
1 | LOCAL_PATH := $(call my-dir)
2 | 
3 | include $(call all-subdir-makefiles)
4 | 


--------------------------------------------------------------------------------
/jni/Application.mk:
--------------------------------------------------------------------------------
1 | APP_ABI := armeabi armeabi-v7a
2 | APP_MODULES := resample
3 | 


--------------------------------------------------------------------------------
/jni/resample/Android.mk:
--------------------------------------------------------------------------------
 1 | LOCAL_PATH := $(call my-dir)
 2 | 
 3 | include $(CLEAR_VARS)
 4 | 
 5 | LOCAL_MODULE := resample
 6 | LOCAL_SRC_FILES := resample.c resample-interface.c
 7 | LOCAL_C_INCLUDES := resample.h resample-interface.h
 8 | LOCAL_LDLIBS := -llog
 9 | 
10 | include $(BUILD_SHARED_LIBRARY)
11 | 


--------------------------------------------------------------------------------
/jni/resample/resample-interface.c:
--------------------------------------------------------------------------------
  1 | /* resample.c - sampling rate conversion subroutines
  2 |  *
  3 |  * Original version available at the
  4 |  * Digital Audio Resampling Home Page located at
  5 |  * http://ccrma.stanford.edu/~jos/resample/.
  6 |  *
  7 |  * Modified for use on Android by Ethan Chen
  8 |  *
  9 |  * This library is free software; you can redistribute it and/or
 10 |  * modify it under the terms of the GNU Lesser General Public
 11 |  * License as published by the Free Software Foundation; either
 12 |  * version 2 of the License, or (at your option) any later version.
 13 |  *
 14 |  * This library is distributed in the hope that it will be useful,
 15 |  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16 |  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 17 |  * Lesser General Public License for more details.
 18 |  *
 19 |  * You should have received a copy of the GNU Lesser General Public
 20 |  * License along with this library; if not, write to the Free Software
 21 |  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
 22 |  */
 23 | 
 24 | #include "resample-interface.h"
 25 | #include "resample.h"
 26 | #include <stdlib.h>
 27 | #include <string.h>
 28 | #include <android/log.h>
 29 | 
 30 | static int num_channels;
 31 | static struct rs_data **rs;
 32 | 
 33 | static void downMix(short *out, short *pcm_left, short *pcm_right, int len)
 34 | {
 35 | 	int i;
 36 | 	for (i = 0; i < len; i++) {
 37 | 		out[i] = (pcm_left[i] / 2 + pcm_right[i] / 2);
 38 | 	}
 39 | }
 40 | 
 41 | JNIEXPORT void JNICALL Java_net_sourceforge_resample_Resample_downmix
 42 |     (JNIEnv * env, jclass class, jshortArray outputBuffer,
 43 |      jshortArray inputLeft, jshortArray inputRight, jint numSamples) {
 44 | 	short *input_left, *input_right, *output_buf;
 45 | 
 46 | 	output_buf =
 47 | 	    (short *)(*env)->GetPrimitiveArrayCritical(env, outputBuffer, 0);
 48 | 	input_left =
 49 | 	    (short *)(*env)->GetPrimitiveArrayCritical(env, inputLeft, 0);
 50 | 	input_right =
 51 | 	    (short *)(*env)->GetPrimitiveArrayCritical(env, inputRight, 0);
 52 | 
 53 | 	downMix(output_buf, input_left, input_right, numSamples);
 54 | 
 55 | 	/* dont bother updating left/right buffers */
 56 | 	(*env)->ReleasePrimitiveArrayCritical(env, inputLeft, input_left,
 57 | 					      JNI_ABORT);
 58 | 	(*env)->ReleasePrimitiveArrayCritical(env, inputRight, input_right,
 59 | 					      JNI_ABORT);
 60 | 	/* update the output buffer */
 61 | 	(*env)->ReleasePrimitiveArrayCritical(env, outputBuffer, output_buf, 0);
 62 | }
 63 | 
 64 | JNIEXPORT jint JNICALL Java_net_sourceforge_resample_Resample_resample
 65 |   (JNIEnv *env, jclass class, jdouble factor, jshortArray inputBuffer, jshortArray outputBuffer, jint numSamples)
 66 | {
 67 |     int num;
 68 |     short *in_buf, *out_buf;
 69 | 
 70 |     in_buf = (short *)(*env)->GetPrimitiveArrayCritical(env, inputBuffer, 0);
 71 |     out_buf = (short *)(*env)->GetPrimitiveArrayCritical(env, outputBuffer, 0);
 72 | 
 73 |     num = resample_simple(factor, in_buf, out_buf, numSamples);
 74 | 
 75 |     (*env)->ReleasePrimitiveArrayCritical(env, inputBuffer, in_buf, JNI_ABORT);
 76 |     (*env)->ReleasePrimitiveArrayCritical(env, outputBuffer, out_buf, 0);
 77 | 
 78 |     return num;
 79 | }
 80 | 
 81 | JNIEXPORT void JNICALL Java_net_sourceforge_resample_Resample_initialize
 82 |     (JNIEnv * env, jclass class, jint inputRate, jint outputRate,
 83 |      jint bufferSize, jint channels) {
 84 | 	int i;
 85 | 	if (!rs) {
 86 | 		num_channels = channels;
 87 | 		rs = calloc(num_channels, sizeof(struct rs_data *));
 88 | 		for (i = 0; i < num_channels; i++) {
 89 | 			rs[i] =
 90 | 			    resample_init(inputRate, outputRate, bufferSize);
 91 | 		}
 92 | 	} else {
 93 | 		__android_log_print(ANDROID_LOG_DEBUG, "libresample.so",
 94 | 				    "Unable to initialize libresample");
 95 | 	}
 96 | }
 97 | 
 98 | JNIEXPORT jdouble JNICALL Java_net_sourceforge_resample_Resample_getFactor
 99 |     (JNIEnv * env, jclass class) {
100 | 	return rs[net_sourceforge_resample_Resample_CHANNEL_MONO]->factor;
101 | }
102 | 
103 | JNIEXPORT jint JNICALL Java_net_sourceforge_resample_Resample_process
104 |     (JNIEnv * env, jclass class, jshortArray inputBuffer,
105 |      jshortArray outputBuffer, jint channel, jboolean isLast) {
106 | 	int i, in_len, out_len, res;
107 | 	short *in_buf, *out_buf;
108 | 
109 | 	if (!rs) {
110 | 		__android_log_print(ANDROID_LOG_DEBUG, "libresample.so",
111 | 				    "No suitable resample instance found!");
112 | 		return -1;
113 | 	}
114 | 
115 | 	if (channel >= net_sourceforge_resample_Resample_MAX_CHANNELS) {
116 | 		__android_log_print(ANDROID_LOG_DEBUG, "libresample.so",
117 | 				    "Resample supports stereo, mono only!");
118 | 		return -1;
119 | 	}
120 | 
121 | 	in_len = (*env)->GetArrayLength(env, inputBuffer);
122 | 	out_len = (*env)->GetArrayLength(env, outputBuffer);
123 | 	in_buf =
124 | 	    (short *)(*env)->GetPrimitiveArrayCritical(env, inputBuffer, 0);
125 | 	out_buf =
126 | 	    (short *)(*env)->GetPrimitiveArrayCritical(env, outputBuffer, 0);
127 | 
128 | 	res = resample(rs[channel], in_buf, in_len, out_buf, out_len, isLast);
129 | 	/* don't bother updating input buffer */
130 | 	(*env)->ReleasePrimitiveArrayCritical(env, inputBuffer, in_buf,
131 | 					      JNI_ABORT);
132 | 	/* do update the output buffer */
133 | 	(*env)->ReleasePrimitiveArrayCritical(env, outputBuffer, in_buf, 0);
134 | 
135 | 	return res;
136 | }
137 | 
138 | JNIEXPORT void JNICALL Java_net_sourceforge_resample_Resample_close
139 |     (JNIEnv * env, jclass class) {
140 | 	int i;
141 | 	if (rs) {
142 | 		for (i = 0; i < num_channels; i++) {
143 | 			resample_close(rs[i]);
144 | 		}
145 | 		free(rs);
146 | 		rs = NULL;
147 | 		num_channels = 0;
148 | 	}
149 | }
150 | 


--------------------------------------------------------------------------------
/jni/resample/resample-interface.h:
--------------------------------------------------------------------------------
 1 | /* DO NOT EDIT THIS FILE - it is machine generated */
 2 | #include <jni.h>
 3 | /* Header for class net_sourceforge_resample_Resample */
 4 | 
 5 | #ifndef _Included_net_sourceforge_resample_Resample
 6 | #define _Included_net_sourceforge_resample_Resample
 7 | #ifdef __cplusplus
 8 | extern "C" {
 9 | #endif
10 | #undef net_sourceforge_resample_Resample_DEFAULT_BUFFER_SIZE
11 | #define net_sourceforge_resample_Resample_DEFAULT_BUFFER_SIZE 4096L
12 | #undef net_sourceforge_resample_Resample_MAX_CHANNELS
13 | #define net_sourceforge_resample_Resample_MAX_CHANNELS 2L
14 | #undef net_sourceforge_resample_Resample_CHANNEL_MONO
15 | #define net_sourceforge_resample_Resample_CHANNEL_MONO 0L
16 | #undef net_sourceforge_resample_Resample_CHANNEL_LEFT
17 | #define net_sourceforge_resample_Resample_CHANNEL_LEFT 0L
18 | #undef net_sourceforge_resample_Resample_CHANNEL_RIGHT
19 | #define net_sourceforge_resample_Resample_CHANNEL_RIGHT 1L
20 | /*
21 |  * Class:     net_sourceforge_resample_Resample
22 |  * Method:    downmix
23 |  * Signature: ([S[S[SI)V
24 |  */
25 | JNIEXPORT void JNICALL Java_net_sourceforge_resample_Resample_downmix
26 |   (JNIEnv *, jclass, jshortArray, jshortArray, jshortArray, jint);
27 | 
28 | /*
29 |  * Class:     net_sourceforge_resample_Resample
30 |  * Method:    resample
31 |  * Signature: (D[S[SI)I
32 |  */
33 | JNIEXPORT jint JNICALL Java_net_sourceforge_resample_Resample_resample
34 |   (JNIEnv *, jclass, jdouble, jshortArray, jshortArray, jint);
35 | 
36 | /*
37 |  * Class:     net_sourceforge_resample_Resample
38 |  * Method:    initialize
39 |  * Signature: (IIII)V
40 |  */
41 | JNIEXPORT void JNICALL Java_net_sourceforge_resample_Resample_initialize
42 |   (JNIEnv *, jclass, jint, jint, jint, jint);
43 | 
44 | /*
45 |  * Class:     net_sourceforge_resample_Resample
46 |  * Method:    getFactor
47 |  * Signature: ()D
48 |  */
49 | JNIEXPORT jdouble JNICALL Java_net_sourceforge_resample_Resample_getFactor
50 |   (JNIEnv *, jclass);
51 | 
52 | /*
53 |  * Class:     net_sourceforge_resample_Resample
54 |  * Method:    process
55 |  * Signature: ([S[SIZ)I
56 |  */
57 | JNIEXPORT jint JNICALL Java_net_sourceforge_resample_Resample_process
58 |   (JNIEnv *, jclass, jshortArray, jshortArray, jint, jboolean);
59 | 
60 | /*
61 |  * Class:     net_sourceforge_resample_Resample
62 |  * Method:    close
63 |  * Signature: ()V
64 |  */
65 | JNIEXPORT void JNICALL Java_net_sourceforge_resample_Resample_close
66 |   (JNIEnv *, jclass);
67 | 
68 | #ifdef __cplusplus
69 | }
70 | #endif
71 | #endif
72 | 


--------------------------------------------------------------------------------
/jni/resample/resample.c:
--------------------------------------------------------------------------------
  1 | /* resample.c - sampling rate conversion subroutines
  2 |  *
  3 |  * Original version available at the 
  4 |  * Digital Audio Resampling Home Page located at
  5 |  * http://ccrma.stanford.edu/~jos/resample/.
  6 |  *
  7 |  * Modified for use on Android by Ethan Chen
  8 |  *
  9 |  * This library is free software; you can redistribute it and/or
 10 |  * modify it under the terms of the GNU Lesser General Public
 11 |  * License as published by the Free Software Foundation; either
 12 |  * version 2 of the License, or (at your option) any later version.
 13 |  *
 14 |  * This library is distributed in the hope that it will be useful,
 15 |  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16 |  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 17 |  * Lesser General Public License for more details.
 18 |  *
 19 |  * You should have received a copy of the GNU Lesser General Public
 20 |  * License along with this library; if not, write to the Free Software
 21 |  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
 22 |  */
 23 | 
 24 | #include <stdlib.h>
 25 | #include <stdio.h>
 26 | #include <math.h>
 27 | #include <string.h>
 28 | #include "resample.h"
 29 | 
 30 | #define IBUFFSIZE 4096		/* default input buffer size */
 31 | 
 32 | static inline short WordToHword(int v, int scl)
 33 | {
 34 | 	short out;
 35 | 	int llsb = (1 << (scl - 1));
 36 | 	v += llsb;		/* round */
 37 | 	v >>= scl;
 38 | 	if (v > MAX_HWORD) {
 39 | 		v = MIN_HWORD;
 40 | 	}
 41 | 	out = (short)v;
 42 | 	return out;
 43 | }
 44 | 
 45 | /* Sampling rate conversion using linear interpolation for maximum speed. */
 46 | static int SrcLinear(short X[], short Y[], double factor, unsigned int *Time,
 47 | 		     unsigned short Nx)
 48 | {
 49 | 	short iconst;
 50 | 	short *Xp, *Ystart;
 51 | 	int v, x1, x2;
 52 | 
 53 | 	unsigned int dt;	/* Step through input signal */
 54 | 	unsigned int endTime;
 55 | 
 56 | 	factor = 1.0 / factor;
 57 | 	dt = factor * FP_FACTOR + 0.5;	/* Output sampling period */
 58 | 
 59 | 	Ystart = Y;
 60 | 	endTime = *Time + FP_FACTOR * (int)Nx;
 61 | 	while (*Time < endTime) {
 62 | 		iconst = (*Time) & FP_MASK;	/* mask off lower 16 bits of time */
 63 | 		Xp = &X[(*Time) >> FP_DIGITS];	/* Ptr to current input sample is top 16 bits */
 64 | 		x1 = *Xp++;
 65 | 		x2 = *Xp;
 66 | 		x1 *= FP_FACTOR - iconst;
 67 | 		x2 *= iconst;
 68 | 		v = x1 + x2;
 69 | 		*Y++ = WordToHword(v, FP_DIGITS);	/* Deposit output */
 70 | 		*Time += dt;	/* Move to next sample by time increment */
 71 | 	}
 72 | 	return (Y - Ystart);	/* Return number of output samples */
 73 | }
 74 | 
 75 | int
 76 | resample_simple(double factor, short *in_buf, short *out_buf, int buffer_size)
 77 | {
 78 |     int num;
 79 |     int time;
 80 | 
 81 |     time = (10 << FP_DIGITS);
 82 |     num = SrcLinear(in_buf, out_buf, factor, &time, buffer_size);
 83 | 
 84 |     return num;
 85 | }
 86 | 
 87 | struct rs_data *resample_init(int in_rate, int out_rate, int buffer_size)
 88 | {
 89 | 	struct rs_data *rs;
 90 | 
 91 | 	rs = (struct rs_data *)calloc(sizeof(struct rs_data), 1);
 92 | 	if (!rs) {
 93 | 		return NULL;
 94 | 	}
 95 | 	if (out_rate <= 0 || in_rate <= 0) {
 96 | 		return NULL;
 97 | 	}
 98 | 
 99 | 	rs->factor = out_rate / (double)in_rate;
100 | 	rs->in_buf_offset = 10;
101 | 	rs->in_buf_ptr = rs->in_buf_offset;
102 | 	rs->in_buf_read = rs->in_buf_offset;
103 | 	rs->time = (rs->in_buf_offset << FP_DIGITS);
104 | 
105 | 	rs->in_buf_size = buffer_size;
106 | 	rs->out_buf_size =
107 | 	    (int)(((double)(rs->in_buf_size)) * rs->factor + 2.0);
108 | 
109 | 	rs->in_buf =
110 | 	    (short *)calloc(sizeof(short), rs->in_buf_size + rs->in_buf_offset);
111 | 	rs->out_buf = (short *)calloc(sizeof(short), rs->out_buf_size);
112 | 	if (!rs->in_buf || !rs->out_buf) {
113 | 		resample_close(rs);
114 | 		return NULL;
115 | 	}
116 | 	memset(rs->in_buf, 0, sizeof(short) * rs->in_buf_offset);
117 | 	return rs;
118 | }
119 | 
120 | int
121 | resample(struct rs_data *rs, short *in_buf, int in_buf_size, short *out_buf,
122 | 	 int out_buf_size, int last)
123 | {
124 | 	int i, len;
125 | 	int num_in;		/* number of samples from previous buffer */
126 | 	int num_out;		/* number of samples resampled by SrcLinear */
127 | 	int num_reuse;		/* number of samples to re-use in next buffer */
128 | 	int num_creep;		/* number of samples of time accumulation */
129 | 	int out_total_samples;
130 | 
131 | 	if (!rs) {
132 | 		return -1;
133 | 	}
134 | 
135 | 	rs->in_buf_used = 0;
136 | 	out_total_samples = 0;
137 | 
138 | 	if (rs->out_buf_ptr) {
139 | 		len = MIN(out_buf_size, rs->out_buf_ptr);
140 | 		/* copy leftover samples to the output */
141 | 		for (i = 0; i < len; i++) {
142 | 			out_buf[out_total_samples + i] = rs->out_buf[i];
143 | 		}
144 | 		out_total_samples += len;
145 | 		/* shift remaining samples in output buffer to beginning */
146 | 		for (i = 0; i < rs->out_buf_ptr - len; i++) {
147 | 			rs->out_buf[i] = rs->out_buf[len + i];
148 | 		}
149 | 		rs->out_buf_ptr -= len;
150 | 
151 | 		return out_total_samples;
152 | 	}
153 | 
154 | 	for (;;) {
155 | 		/* grab input samples from buffer */
156 | 		len = rs->in_buf_size - rs->in_buf_read;
157 | 		if (len >= in_buf_size - rs->in_buf_used) {
158 | 			len = in_buf_size - rs->in_buf_used;
159 | 		}
160 | 		for (i = 0; i < len; i++) {
161 | 			rs->in_buf[rs->in_buf_read + i] =
162 | 			    in_buf[rs->in_buf_used + i];
163 | 		}
164 | 		rs->in_buf_used += len;
165 | 		rs->in_buf_read += len;
166 | 
167 | 		if (last && (rs->in_buf_used == in_buf_size)) {
168 | 			/* pad buffer with zero if no more data */
169 | 			num_in = rs->in_buf_read - rs->in_buf_offset;
170 | 			for (i = 0; i < rs->in_buf_offset; i++) {
171 | 				rs->in_buf[rs->in_buf_read + i] = 0;
172 | 			}
173 | 		} else {
174 | 			num_in = rs->in_buf_read - 2 * rs->in_buf_offset;
175 | 		}
176 | 
177 | 		if (num_in <= 0) {
178 | 			break;
179 | 		}
180 | 
181 | 		/* do linear interpolation */
182 | 		num_out =
183 | 		    SrcLinear(rs->in_buf, rs->out_buf, rs->factor,
184 | 			      &rs->time, num_in);
185 | 
186 | 		/* move time back num_in samples back */
187 | 		rs->time -= (num_in << FP_DIGITS);
188 | 		rs->in_buf_ptr += num_in;
189 | 
190 | 		/* remove time accumulation */
191 | 		num_creep = (rs->time >> FP_DIGITS) - rs->in_buf_offset;
192 | 		if (num_creep) {
193 | 			rs->time -= (num_creep << FP_DIGITS);
194 | 			rs->in_buf_ptr += num_creep;
195 | 		}
196 | 
197 | 		/* copy input signal that needs to be reused */
198 | 		num_reuse =
199 | 		    rs->in_buf_read - (rs->in_buf_ptr - rs->in_buf_offset);
200 | 		for (i = 0; i < num_reuse; i++) {
201 | 			rs->in_buf[i] =
202 | 			    rs->in_buf[(rs->in_buf_ptr - rs->in_buf_offset) +
203 | 				       i];
204 | 		}
205 | 		rs->in_buf_read = num_reuse;
206 | 		rs->in_buf_ptr = rs->in_buf_offset;
207 | 
208 | 		/* copy samples to output buffer */
209 | 		rs->out_buf_ptr = num_out;
210 | 		if (rs->out_buf_ptr && (out_buf_size - out_total_samples > 0)) {
211 | 			len =
212 | 			    MIN(out_buf_size - out_total_samples,
213 | 				rs->out_buf_ptr);
214 | 			for (i = 0; i < len; i++) {
215 | 				out_buf[out_total_samples + i] = rs->out_buf[i];
216 | 			}
217 | 			out_total_samples += len;
218 | 			/* store uncopied output buffer */
219 | 			for (i = 0; i < rs->out_buf_ptr - len; i++) {
220 | 				rs->out_buf[i] = rs->out_buf[len + i];
221 | 			}
222 | 			rs->out_buf_ptr -= len;
223 | 		}
224 | 		if (rs->out_buf_ptr) {
225 | 			break;
226 | 		}
227 | 	}
228 | 
229 | 	return out_total_samples;
230 | }
231 | 
232 | void resample_close(struct rs_data *rs)
233 | {
234 | 	if (rs) {
235 | 		free(rs->in_buf);
236 | 		free(rs->out_buf);
237 | 		free(rs);
238 | 		rs = NULL;
239 | 	}
240 | }
241 | 


--------------------------------------------------------------------------------
/jni/resample/resample.h:
--------------------------------------------------------------------------------
 1 | /* resample.h - sampling rate conversion subroutines
 2 |  *
 3 |  * Original version available at the 
 4 |  * Digital Audio Resampling Home Page located at
 5 |  * http://ccrma.stanford.edu/~jos/resample/.
 6 |  *
 7 |  * Modified for use on Android by Ethan Chen
 8 |  *
 9 |  * This library is free software; you can redistribute it and/or
10 |  * modify it under the terms of the GNU Lesser General Public
11 |  * License as published by the Free Software Foundation; either
12 |  * version 2 of the License, or (at your option) any later version.
13 |  *
14 |  * This library is distributed in the hope that it will be useful,
15 |  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 |  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 |  * Lesser General Public License for more details.
18 |  *
19 |  * You should have received a copy of the GNU Lesser General Public
20 |  * License along with this library; if not, write to the Free Software
21 |  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
22 |  */
23 | 
24 | #define FP_DIGITS 15
25 | #define FP_FACTOR (1 << FP_DIGITS)
26 | #define FP_MASK (FP_FACTOR - 1)
27 | 
28 | #define MAX_HWORD (32767)
29 | #define MIN_HWORD (-32768)
30 | 
31 | #ifndef MAX
32 | #define MAX(x,y) ((x)>(y) ?(x):(y))
33 | #endif
34 | #ifndef MIN
35 | #define MIN(x,y) ((x)<(y) ?(x):(y))
36 | #endif
37 | 
38 | struct rs_data {
39 | 	double factor;
40 | 	/* time is 32-bit fixed-point using 2^FP_FACTOR as factor */
41 | 	unsigned int time;
42 | 	int in_buf_ptr;
43 | 	int out_buf_ptr;
44 | 	int in_buf_read;
45 | 	int in_buf_offset;
46 | 	int in_buf_used;
47 | 	int in_buf_size;
48 | 	int out_buf_size;
49 | 	short *in_buf;
50 | 	short *out_buf;
51 | };
52 | 
53 | int resample_simple(double factor, short *in_buf, short *out_buf, int buffer_size);
54 | 
55 | struct rs_data *resample_init(int in_rate, int out_rate, int buffer_size);
56 | 
57 | int resample(struct rs_data *rs, short *in_buf, int in_buf_size, short *out_buf,
58 | 	     int out_buf_size, int last);
59 | 
60 | void resample_close(struct rs_data *rs);
61 | 


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/proguard.cfg:
--------------------------------------------------------------------------------
 1 | -optimizationpasses 5
 2 | -dontusemixedcaseclassnames
 3 | -dontskipnonpubliclibraryclasses
 4 | -dontpreverify
 5 | -verbose
 6 | -optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
 7 | 
 8 | -keep public class * extends android.app.Activity
 9 | -keep public class * extends android.app.Application
10 | -keep public class * extends android.app.Service
11 | -keep public class * extends android.content.BroadcastReceiver
12 | -keep public class * extends android.content.ContentProvider
13 | -keep public class * extends android.app.backup.BackupAgentHelper
14 | -keep public class * extends android.preference.Preference
15 | -keep public class com.android.vending.licensing.ILicensingService
16 | 
17 | -keepclasseswithmembernames class * {
18 |     native <methods>;
19 | }
20 | 
21 | -keepclasseswithmembernames class * {
22 |     public <init>(android.content.Context, android.util.AttributeSet);
23 | }
24 | 
25 | -keepclasseswithmembernames class * {
26 |     public <init>(android.content.Context, android.util.AttributeSet, int);
27 | }
28 | 
29 | -keepclassmembers enum * {
30 |     public static **[] values();
31 |     public static ** valueOf(java.lang.String);
32 | }
33 | 
34 | -keep class * implements android.os.Parcelable {
35 |   public static final android.os.Parcelable$Creator *;
36 | }
37 | 


--------------------------------------------------------------------------------
/res/values/strings.xml:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="utf-8"?>
2 | <resources>
3 |     <string name="hello">Hello World!</string>
4 |     <string name="app_name">libresample</string>
5 | </resources>
6 | 


--------------------------------------------------------------------------------
/src/net/sourceforge/resample/Resample.java:
--------------------------------------------------------------------------------
 1 | package net.sourceforge.resample;
 2 | 
 3 | public class Resample {
 4 | 
 5 |     public static final int DEFAULT_BUFFER_SIZE = 4096;
 6 |     public static final int MAX_CHANNELS = 2;
 7 |     public static final int CHANNEL_MONO = 0;
 8 |     public static final int CHANNEL_LEFT = 0;
 9 |     public static final int CHANNEL_RIGHT = 1;
10 | 
11 |     private static final String RESAMPLE_LIB = "resample";
12 | 
13 |     static {
14 |         System.loadLibrary(RESAMPLE_LIB);
15 |     }
16 | 
17 |     public static native void downmix(short outputBuffer[], short inputLeft[], short inputRight[], int numSamples);
18 | 
19 |     public static native int resample(double factor, short inputBuffer[], short outputBuffer[], int numSamples);
20 | 
21 |     public static native void initialize(int inputRate, int outputRate, int bufferSize, int channels);
22 | 
23 |     public static native double getFactor();
24 | 
25 |     public static native int process(short inputBuffer[], short outputBuffer[], int channel, boolean isLast);
26 | 
27 |     public static native void close();
28 | }


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