package com.yy.audiochannaldemo;
public final class Base64Utils {
/*
BASE64编码工具箱
*/
static private final int BASELENGTH = 128;
static private final int LOOKUPLENGTH = 64;
static private final int TWENTYFOURBITGROUP = 24;
static private final int EIGHTBIT = 8;
static private final int SIXTEENBIT = 16;
static private final int FOURBYTE = 4;
static private final int SIGN = -128;
static private final char PAD = '=';
static private final boolean fDebug = false;
static final private byte[] base64Alphabet = new byte[BASELENGTH];
static final private char[] lookUpBase64Alphabet = new char[LOOKUPLENGTH];
static {
for (int i = 0; i < BASELENGTH; ++i) {
base64Alphabet[i] = -1;
}
for (int i = 'Z'; i >= 'A'; i--) {
base64Alphabet[i] = (byte) (i - 'A');
}
for (int i = 'z'; i >= 'a'; i--) {
base64Alphabet[i] = (byte) (i - 'a' + 26);
}
for (int i = '9'; i >= '0'; i--) {
base64Alphabet[i] = (byte) (i - '0' + 52);
}
base64Alphabet['+'] = 62;
base64Alphabet['/'] = 63;
for (int i = 0; i <= 25; i++) {
lookUpBase64Alphabet[i] = (char) ('A' + i);
}
for (int i = 26, j = 0; i <= 51; i++, j++) {
lookUpBase64Alphabet[i] = (char) ('a' + j);
}
for (int i = 52, j = 0; i <= 61; i++, j++) {
lookUpBase64Alphabet[i] = (char) ('0' + j);
}
lookUpBase64Alphabet[62] = (char) '+';
lookUpBase64Alphabet[63] = (char) '/';
}
private static boolean isWhiteSpace(char octect) {
return (octect == 0x20 || octect == 0xd || octect == 0xa || octect == 0x9);
}
private static boolean isPad(char octect) {
return (octect == PAD);
}
private static boolean isData(char octect) {
return (octect < BASELENGTH && base64Alphabet[octect] != -1);
}
/**
* Encodes hex octects into Base64
*
* @param binaryData Array containing binaryData
* @return Encoded Base64 array
*/
public static String encode(byte[] binaryData) {
if (binaryData == null) {return null; }
int lengthDataBits = binaryData.length * EIGHTBIT;
if (lengthDataBits == 0) { return ""; }
int fewerThan24bits = lengthDataBits % TWENTYFOURBITGROUP;
int numberTriplets = lengthDataBits / TWENTYFOURBITGROUP;
int numberQuartet = fewerThan24bits != 0 ? numberTriplets + 1 : numberTriplets;
char encodedData[] = null;
encodedData = new char[numberQuartet * 4];
byte k = 0, l = 0, b1 = 0, b2 = 0, b3 = 0;
int encodedIndex = 0;
int dataIndex = 0;
if (fDebug) {
System.out.println("number of triplets = " + numberTriplets);
}
for (int i = 0; i < numberTriplets; i++) {
b1 = binaryData[dataIndex++];
b2 = binaryData[dataIndex++];
b3 = binaryData[dataIndex++];
if (fDebug) {
System.out.println("b1= " + b1 + ", b2= " + b2 + ", b3= " + b3);
}
l = (byte) (b2 & 0x0f);
k = (byte) (b1 & 0x03);
byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2) : (byte) ((b1) >> 2 ^ 0xc0);
byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4) : (byte) ((b2) >> 4 ^ 0xf0);
byte val3 = ((b3 & SIGN) == 0) ? (byte) (b3 >> 6) : (byte) ((b3) >> 6 ^ 0xfc);
if (fDebug) {
System.out.println("val2 = " + val2);
System.out.println("k4 = " + (k << 4));
System.out.println("vak = " + (val2 | (k << 4)));
}
encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
encodedData[encodedIndex++] = lookUpBase64Alphabet[(l << 2) | val3];
encodedData[encodedIndex++] = lookUpBase64Alphabet[b3 & 0x3f];
}
// form integral number of 6-bit groups
if (fewerThan24bits == EIGHTBIT) {
b1 = binaryData[dataIndex];
k = (byte) (b1 & 0x03);
if (fDebug) {
System.out.println("b1=" + b1);
System.out.println("b1<<2 = " + (b1 >> 2));
}
byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2) : (byte) ((b1) >> 2 ^ 0xc0);
encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
encodedData[encodedIndex++] = lookUpBase64Alphabet[k << 4];
encodedData[encodedIndex++] = PAD;
encodedData[encodedIndex++] = PAD;
} else if (fewerThan24bits == SIXTEENBIT) {
b1 = binaryData[dataIndex];
b2 = binaryData[dataIndex + 1];
l = (byte) (b2 & 0x0f);
k = (byte) (b1 & 0x03);
byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2) : (byte) ((b1) >> 2 ^ 0xc0);
byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4) : (byte) ((b2) >> 4 ^ 0xf0);
encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
encodedData[encodedIndex++] = lookUpBase64Alphabet[l << 2];
encodedData[encodedIndex++] = PAD;
}
return new String(encodedData);
}
/**
* Decodes Base64 data into octects
*
* @param encoded string containing Base64 data
* @return Array containind decoded data.
*/
public static byte[] decode(String encoded) {
if (encoded == null) {
return null;
}
char[] base64Data = encoded.toCharArray();
// remove white spaces
int len = removeWhiteSpace(base64Data);
if (len % FOURBYTE != 0) {
return null;//should be divisible by four
}
int numberQuadruple = (len / FOURBYTE);
if (numberQuadruple == 0) {
return new byte[0];
}
byte decodedData[] = null;
byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
char d1 = 0, d2 = 0, d3 = 0, d4 = 0;
int i = 0;
int encodedIndex = 0;
int dataIndex = 0;
decodedData = new byte[(numberQuadruple) * 3];
for (; i < numberQuadruple - 1; i++) {
if (!isData((d1 = base64Data[dataIndex++])) || !isData((d2 = base64Data[dataIndex++]))
|| !isData((d3 = base64Data[dataIndex++]))
|| !isData((d4 = base64Data[dataIndex++]))) {
return null;
}//if found "no data" just return null
b1 = base64Alphabet[d1];
b2 = base64Alphabet[d2];
b3 = base64Alphabet[d3];
b4 = base64Alphabet[d4];
decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);
}
if (!isData((d1 = base64Data[dataIndex++])) || !isData((d2 = base64Data[dataIndex++]))) {
return null;//if found "no data" just return null
}
b1 = base64Alphabet[d1];
b2 = base64Alphabet[d2];
d3 = base64Data[dataIndex++];
d4 = base64Data[dataIndex++];
if (!isData((d3)) || !isData((d4))) {//Check if they are PAD characters
if (isPad(d3) && isPad(d4)) {
if ((b2 & 0xf) != 0)//last 4 bits should be zero
{
return null;
}
b
没有合适的资源?快使用搜索试试~ 我知道了~
安卓开发:挑战每天发布一个封装类02-Wav录音封装类AudioChannel 1.0资源
共120个文件
xml:69个
bin:10个
png:10个
需积分: 0 0 下载量 126 浏览量
2024-02-22
00:35:26
上传
评论
收藏 450KB RAR 举报
温馨提示
简介 库名称:AudioChannel 版本:1.0 由于项目需求录音并base64编码存到服务器中,就顺手改装了一个别人的封装类 原封装类地址:Android AudioRecord音频录制wav文件输出 - 简书 (jianshu.com) 描述:此封装类基于AudioRecord实现wav的音频录制,本封装类对原版进行了以下修改: 1.部分修正 (1).可以看到,原封装类继承Thread,代码逻辑很清晰,因此改动过程也较轻松,单次运行能够正常,但是在二次运行,发现报错: 的执行并且已经退出。一旦线程终止,不能重新启动,因此新版封装类不再继承Thread,而是通过priavate线程重建函数initThread来实现。 (2).首先AudioRecord不能够直接保存录音为wav,因此必须先保存为pcm文件,再通过头部写入数据,转换为wav文件,在这个过程中注意到原封装库,没有对保存pcm的文件进行删除处理,后续可能导致容量过大 (3).构建函数,传入context,以此就无需动态授权外部存储写入权限,也方便后续需要context的操作部分 2.权限控制 在使
资源推荐
资源详情
资源评论
收起资源包目录
安卓开发:挑战每天发布一个封装类02-Wav录音封装类AudioChannel 1.0资源 (120个子文件)
gradlew.bat 2KB
executionHistory.bin 1018KB
classAnalysis.bin 881KB
jarAnalysis.bin 321KB
fileHashes.bin 70KB
taskHistory.bin 51KB
outputFiles.bin 25KB
sha1-checksums.bin 19KB
resourceHashesCache.bin 18KB
md5-checksums.bin 18KB
last-build.bin 1B
.gitignore 240B
.gitignore 50B
.gitignore 6B
build.gradle 1KB
build.gradle 681B
settings.gradle 55B
gradlew 5KB
AudioChannalDemo.app.iml 9KB
AudioChannalDemo.iml 1KB
gradle-wrapper.jar 53KB
Base64Utils.java 10KB
AudioChannel.java 7KB
PcmToWavUtil.java 4KB
PPActvity.java 4KB
MainActivity.java 3KB
ExampleInstrumentedTest.java 785B
ExampleUnitTest.java 400B
buildOutputCleanup.lock 17B
checksums.lock 17B
javaCompile.lock 17B
executionHistory.lock 17B
fileHashes.lock 17B
ic_launcher_round.png 16KB
ic_launcher_round.png 12KB
ic_launcher.png 10KB
ic_launcher.png 8KB
ic_launcher_round.png 7KB
ic_launcher_round.png 5KB
ic_launcher.png 5KB
ic_launcher.png 4KB
ic_launcher_round.png 3KB
ic_launcher.png 3KB
proguard-rules.pro 770B
gradle.properties 1019B
local.properties 419B
gradle-wrapper.properties 238B
cache.properties 53B
gc.properties 0B
gc.properties 0B
gc.properties 0B
workspace.xml 10KB
ic_launcher_background.xml 6KB
ic_launcher_foreground.xml 2KB
jarRepositories.xml 1KB
activity_ppactvity.xml 1KB
Gradle__androidx_test_espresso_espresso_idling_resource_3_3_0_aar.xml 1KB
Gradle__androidx_coordinatorlayout_coordinatorlayout_1_1_0_aar.xml 1003B
Gradle__com_github_PhilJay_MPAndroidChart_v3_1_0_aar.xml 990B
Gradle__androidx_test_espresso_espresso_core_3_3_0_aar.xml 986B
AndroidManifest.xml 978B
Gradle__androidx_recyclerview_recyclerview_1_1_0_aar.xml 958B
Gradle__androidx_drawerlayout_drawerlayout_1_0_0_aar.xml 958B
Gradle__com_google_android_material_material_1_2_1_aar.xml 942B
Gradle__androidx_transition_transition_1_2_0_aar.xml 940B
Gradle__androidx_viewpager2_viewpager2_1_0_0_aar.xml 940B
Gradle__androidx_appcompat_appcompat_1_2_0_aar.xml 931B
Gradle__androidx_fragment_fragment_1_1_0_aar.xml 922B
Gradle__androidx_test_monitor_1_3_0_aar.xml 911B
Gradle__androidx_test_ext_junit_1_1_2_aar.xml 907B
Gradle__androidx_test_runner_1_3_0_aar.xml 903B
Gradle__androidx_test_core_1_3_0_aar.xml 887B
Gradle__androidx_core_core_1_3_1_aar.xml 886B
Gradle__androidx_vectordrawable_vectordrawable_animated_1_1_0_aar.xml 854B
themes.xml 853B
themes.xml 853B
Gradle__androidx_annotation_annotation_experimental_1_0_0_aar.xml 846B
Gradle__androidx_lifecycle_lifecycle_livedata_core_2_0_0_aar.xml 844B
Gradle__androidx_versionedparcelable_versionedparcelable_1_1_0_aar.xml 840B
activity_main.xml 836B
Gradle__androidx_lifecycle_lifecycle_viewmodel_2_1_0_aar.xml 820B
Gradle__androidx_appcompat_appcompat_resources_1_2_0_aar.xml 820B
Gradle__androidx_lifecycle_lifecycle_livedata_2_0_0_aar.xml 814B
Gradle__androidx_lifecycle_lifecycle_runtime_2_1_0_aar.xml 808B
Gradle__androidx_vectordrawable_vectordrawable_1_1_0_aar.xml 800B
Gradle__androidx_cursoradapter_cursoradapter_1_0_0_aar.xml 792B
Gradle__androidx_interpolator_interpolator_1_0_0_aar.xml 784B
Gradle__androidx_arch_core_core_runtime_2_0_0_aar.xml 778B
Gradle__androidx_savedstate_savedstate_1_0_0_aar.xml 768B
Gradle__androidx_customview_customview_1_0_0_aar.xml 768B
Gradle__androidx_viewpager_viewpager_1_0_0_aar.xml 760B
Gradle__androidx_activity_activity_1_0_0_aar.xml 752B
Gradle__androidx_cardview_cardview_1_0_0_aar.xml 752B
Gradle__org_hamcrest_hamcrest_integration_1_3.xml 750B
Gradle__androidx_loader_loader_1_0_0_aar.xml 736B
Gradle__org_apache_commons_commons_math3_3_5.xml 725B
Gradle__com_github_wendykierp_JTransforms_3_1.xml 723B
Gradle__androidx_annotation_annotation_1_1_0.xml 722B
Gradle__org_hamcrest_hamcrest_library_1_3.xml 721B
Gradle__org_hamcrest_hamcrest_core_1_3.xml 701B
共 120 条
- 1
- 2
资源评论
温辉(福州职业技术学校)
- 粉丝: 382
- 资源: 7
上传资源 快速赚钱
- 我的内容管理 展开
- 我的资源 快来上传第一个资源
- 我的收益 登录查看自己的收益
- 我的积分 登录查看自己的积分
- 我的C币 登录后查看C币余额
- 我的收藏
- 我的下载
- 下载帮助
安全验证
文档复制为VIP权益,开通VIP直接复制
信息提交成功