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Android Studio NDK开发(九):变声特效

Android Studio NDK开发(九):变声特效

作者: zhang_pan | 来源:发表于2017-12-02 14:25 被阅读435次

    前言

    首先我们来介绍fmod,fmod声音系统是为游戏开发者准备的革命性音频引擎,如今采用了fmod作为音频引擎的游戏包括Far Cry(孤岛惊魂)、Tom Clancy's Ghost Recon(幽灵行动),甚至著名的World Of Warcraft(魔兽争霸)。而我们此次的变声特效也是使用了fmod这个库。fmod官网:https://www.fmod.com,点击Download,下载针对Android的api

    1.png

    变声特效最后的效果图:

    2.png

    集成fmod,实现播放音频文件

    废话不多说,直接上图:

    3.png
    1. 创建一个支持C/C++的项目MyVoiceChange
    2. 将下载好的文件夹下的api / lowlevel / inc 下的头文件复制到项目中cpp下的inc文件夹(自己创建的)下。
    3. 将下载好的文件夹下的api / lowlevel / examples下的play_sound.cpp复制到cpp下,play_sound.cpp中需要头文件common.h,故将common.hcommon.cpp复制到cpp下,common.h需要的头文件有common_platform.h,同理将common_platform.hcommon_platform.cpp复制到cpp下。
    4. 将下载好的文件夹下的api / lowlevel / lib下的armeabi文件夹复制到项目中的libs目录下,将fmod.jar也复制到libs目录下,右键Add as library,在app的build.gradle中添加
    externalNativeBuild {
                cmake {
                    cppFlags ""
                    abiFilters "armeabi"
                }
            }
    
    1. 在项目中的main文件夹下新建assets文件夹,将下载好的文件夹下的api / lowlevel / examples / media 文件夹下的drumloop.wav、jaguar.wav、swish.wav三个音频文件复制到assets中

    2. 将inc文件夹下的都加上inc/,如play_sound.cpp

    #include "inc/fmod.hpp"
    #include "common.h"
    
    1. MainActivity复制到项目中,然后将删除关于权限的,在清单文件中添加权限
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
            {
                String[] perms = { "android.permission.RECORD_AUDIO", "android.permission.WRITE_EXTERNAL_STORAGE" };
                if (checkSelfPermission(perms[0]) == PackageManager.PERMISSION_DENIED ||
                    checkSelfPermission(perms[1]) == PackageManager.PERMISSION_DENIED)
                {
                    requestPermissions(perms, 200);
                }
            }
    
    <uses-permission android:name="android.permission.RECORD_AUDIO"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    
    1. MainActivity中的加载库改为
    static {
            System.loadLibrary("voice_change");
        }
    

    由于下面在CMakeLists中的target_link_libraries已经将fmod、fmodL与voice_change链接起来,故这里不需要重复添加加载fmod、fmodL。

    1. common_platform.cpp中将Java_org_fmod_example_MainActivity_改为Java_com_zhangpan_myvoicechange_MainActivity_
    2. 配置CMakeLists
    cmake_minimum_required(VERSION 3.4.1)
    
    set(path_project E:/Demo/MyVoiceChange)
    
    add_library(voice_change
                SHARED
                src/main/cpp/play_sound.cpp
                src/main/cpp/common_platform.cpp)
    
    add_library(fmod
                SHARED
                IMPORTED)
    set_target_properties(fmod
                          PROPERTIES IMPORTED_LOCATION
                          ${path_project}/app/libs/${ANDROID_ABI}/libfmod.so)
    add_library(fmodL
                SHARED
                IMPORTED )
    set_target_properties(fmodL
                          PROPERTIES IMPORTED_LOCATION
                          ${path_project}/app/libs/${ANDROID_ABI}/libfmodL.so)
    
    include_directories(src/main/cpp/inc)
    
    find_library(log-lib
                 log)
    
    target_link_libraries(voice_change
                          fmod
                          fmodL
                          ${log-lib})
    

    编译运行报错

    4.png

    在app的build.gradle中的android中添加,指定预编译so库的路径

    sourceSets {
            main {
                jniLibs.srcDirs = ['libs']
            }
        }
    

    编译运行,成功播放音频文件。

    5.png

    关于配置相关信息,可以查看中文官网地址(需要翻墙):向您的项目添加 C 和 C++ 代码

    仿QQ变声特效

    新建一个cpp文件voice_change.cpp,将CMakeLists中第一个addLibrary中的play_sound.cpp换成voice_change.cppsrc/main/cpp/play_sound.cppsrc/main/cpp/common_platform.cpp删除,其余不变

    add_library(voice_change
                SHARED
                src/main/cpp/voice_change.cpp)
    

    此时可以将之前复制进来的common.cpp、common.h、common_platform.cpp、common_platform.h、play_sound.cpp都可以删除掉,当然了不删除也是没有关系的。
    新建一个Activity文件VoiceChangeActivity,创建布局文件activity_voice_change,添加图片,样式

    public class VoiceChangeActivity extends Activity {
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_voice_change);
        }
    }
    
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:orientation="vertical"
            android:background="#FFF"
            android:paddingBottom="20dp"
            android:gravity="center_horizontal">
    
            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                android:layout_marginTop="20dp">
    
                <LinearLayout 
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">
                    <ImageView
                        android:id="@+id/iv_original"
                        style="@style/AudioImgStyle"
                        android:src="@mipmap/record"
                        android:onClick="mFix"/>
                    <TextView 
                        style="@style/AudioTextStyle"
                        android:text="原声"/>
                </LinearLayout>
    
                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">
                    <ImageView
                        android:id="@+id/iv_girl"
                        style="@style/AudioImgStyle"
                        android:src="@mipmap/luoli"
                        android:onClick="mFix"/>
                    <TextView 
                        style="@style/AudioTextStyle"
                        android:text="萝莉"/>
                </LinearLayout>
                
    
                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">
                    <ImageView
                        android:id="@+id/iv_uncle"
                        style="@style/AudioImgStyle"
                        android:src="@mipmap/dashu"
                        android:onClick="mFix"/>
                    <TextView 
                        style="@style/AudioTextStyle"
                        android:text="大叔"/>
                </LinearLayout>
            </LinearLayout>
            
            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                android:layout_marginTop="20dp">
    
                <LinearLayout 
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">
                    <ImageView
                        android:id="@+id/iv_panic"
                        style="@style/AudioImgStyle"
                        android:src="@mipmap/jingsong"
                        android:onClick="mFix"/>
                    <TextView 
                        style="@style/AudioTextStyle"
                        android:text="惊悚"/>
                </LinearLayout>
    
                <LinearLayout 
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">
                    <ImageView
                        android:id="@+id/iv_funny"
                        style="@style/AudioImgStyle"
                        android:src="@mipmap/gaoguai"
                        android:onClick="mFix"/>
                    <TextView 
                        style="@style/AudioTextStyle"
                        android:text="搞怪"/>
                </LinearLayout>
    
                <LinearLayout 
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">
                    <ImageView
                        android:id="@+id/iv_intangible"
                        style="@style/AudioImgStyle"
                        android:src="@mipmap/kongling"
                        android:onClick="mFix"/>
                    <TextView 
                        style="@style/AudioTextStyle"
                        android:text="空灵"/>
                </LinearLayout>
            </LinearLayout>
        </LinearLayout>
    </RelativeLayout>
    
    <resources>
        <style name="AppBaseTheme" parent="android:Theme.Light"/>
        <style name="AppTheme" parent="AppBaseTheme"/>
        <style name="AudioImgStyle">
            <item name="android:layout_width">wrap_content</item>
            <item name="android:layout_height">wrap_content</item>
            <item name="android:layout_marginLeft">25dp</item>
            <item name="android:layout_marginRight">25dp</item>
        </style>
        <style name="AudioTextStyle">
            <item name="android:layout_width">wrap_content</item>
            <item name="android:layout_height">wrap_content</item>
            <item name="android:layout_marginTop">5dp</item>
            <item name="android:layout_gravity">center_horizontal</item>
        </style>
    </resources>
    

    在清单文件中将MainActivity替换成VoiceChangeActivity
    创建VoiceChangeUtils

    public class VoiceChangeUtils {
        public static final int MODE_ORIGINAL = 0;       //原声
        public static final int MODE_LITTLE_GIRL = 1;    //萝莉
        public static final int MODE_UNCLE = 2;           //大叔
        public static final int MODE_PANIC = 3;           //惊悚
        public static final int MODE_FUNNY = 4;           //搞怪
        public static final int MODE_INTANGIBLE = 5;      //空灵
    
        public static native void fix(String path, int type);
    
        static {
            System.loadLibrary("voice_change");
        }
    }
    

    voice_change.cpp变声特效的核心实现:

    //
    // Created by zp on 2017/11/29.
    //
    #include <stdlib.h>
    #include <jni.h>
    #include <unistd.h>
    #include <fmod.hpp>
    
    #define MODE_ORIGINAL   0
    #define MODE_GIRL       1
    #define MODE_UNCLE      2
    #define MODE_PANIC      3
    #define MODE_FUNNY      4
    #define MODE_INTANGIBLE 5
    using namespace FMOD;
    extern "C"
    JNIEXPORT void JNICALL
    Java_com_zhangpan_myvoicechange_VoiceChangeUtils_fix(JNIEnv *env, jclass type_, jstring path_,
    jint type) {
        System* system;
        void* extradriverdata = 0;
        Sound* sound;
        Channel* channel;
        DSP* dsp;
        bool playing = true;
        float frequency = 0;
        const char *path = env->GetStringUTFChars(path_, 0);
        try {
            //初始化
            System_Create(&system);
            system->init(32, FMOD_INIT_NORMAL, extradriverdata);
            //创建声音
            system->createSound(path, FMOD_DEFAULT, 0, &sound);
            switch (type) {
                case MODE_ORIGINAL:
                    //原生播放
                    system->playSound(sound, 0, false, &channel);
                    break;
                case MODE_GIRL:
                    //萝莉
                    //FMOD_DSP_TYPE_PITCHSHIFT 提高或者降低音调的一种音效
                    system->createDSPByType(FMOD_DSP_TYPE_PITCHSHIFT, &dsp);
                    //设置音调的参数
                    dsp->setParameterFloat(FMOD_DSP_PITCHSHIFT_PITCH, 2.0);
                    //播放萝莉声音
                    system->playSound(sound, 0, false, &channel);
                    //添加到channel
                    channel->addDSP(0, dsp);
                    break;
                case MODE_UNCLE:
                    system->createDSPByType(FMOD_DSP_TYPE_PITCHSHIFT, &dsp);
                    dsp->setParameterFloat(FMOD_DSP_PITCHSHIFT_PITCH, 0.8);
                    system->playSound(sound, 0, false, &channel);
                    channel->addDSP(0, dsp);
                    break;
                case MODE_PANIC:
                    system->createDSPByType(FMOD_DSP_TYPE_TREMOLO, &dsp);
                    dsp->setParameterFloat(FMOD_DSP_TREMOLO_SKEW, 0.5);
                    system->playSound(sound, 0, false, &channel);
                    channel->addDSP(0, dsp);
                    break;
                case MODE_FUNNY:
                    //先playSound才能拿到原音频的频率
                    system->playSound(sound, 0, false, &channel);
                    channel->getFrequency(&frequency);
                    channel->setFrequency(frequency * 1.8);
                    break;
                case MODE_INTANGIBLE:
                    system->createDSPByType(FMOD_DSP_TYPE_ECHO, &dsp);
                    dsp->setParameterFloat(FMOD_DSP_ECHO_DELAY, 300);
                    dsp->setParameterFloat(FMOD_DSP_ECHO_FEEDBACK, 20);
                    system->playSound(sound, 0, false, &channel);
                    channel->addDSP(0, dsp);
                    break;
                default:
                    break;
            }
            system->update();
            while (playing) {
                channel->isPlaying(&playing);
                usleep(1000 * 1000);
            }
        }catch (...) {
            goto end;
        }
        goto end;
    end:
        sound->release();
        system->close();
        system->release();
    
        env->ReleaseStringUTFChars(path_, path);
    }
    

    VoiceChangeActivity的调用:

    public class VoiceChangeActivity extends Activity {
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_voice_change);
    
            FMOD.init(this);
        }
    
        public void mFix(View view) {
            String path = "file:///android_asset/zp.wav";
            switch(view.getId()) {
                case R.id.iv_original:
                    VoiceChangeUtils.fix(path, VoiceChangeUtils.MODE_ORIGINAL);
                    break;
                case R.id.iv_girl:
                    VoiceChangeUtils.fix(path, VoiceChangeUtils.MODE_GIRL);
                    break;
                case R.id.iv_uncle:
                    VoiceChangeUtils.fix(path, VoiceChangeUtils.MODE_UNCLE);
                    break;
                case R.id.iv_panic:
                    VoiceChangeUtils.fix(path, VoiceChangeUtils.MODE_PANIC);
                    break;
                case R.id.iv_funny:
                    VoiceChangeUtils.fix(path, VoiceChangeUtils.MODE_FUNNY);
                    break;
                case R.id.iv_intangible:
                    VoiceChangeUtils.fix(path, VoiceChangeUtils.MODE_INTANGIBLE);
                    break;
                default:
                    break;
            }
        }
    
        @Override
        protected void onDestroy() {
            super.onDestroy();
            FMOD.close();
        }
    }
    

    编译运行,效果图如下:

    6.png

    项目地址:
    https://github.com/fsrmeng/VoiceChange

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