仿QQ语言变声功能

这次写的是QQ语言变声功能，这个功能想必大家都使用过，那么这个功能是怎么实现的呢？
在开发中一边触及和语音，视频，算法等等都和c/c++相关，我们这里也是使用的NDK，链接第三方动态库，生成我们自己的库文件。

先来讲讲第三方的动态库，我们这里使用的FMOD音频引擎提供给android的api和动态库。我们可以到官网下载：
FMOD,因为下载需要注册，但是我天朝的。。。，需要vnp,所以这边也提供了下载地址：FMOD android下的开发

想看下效果图：

这里写图片描述

我么进入正题：

1.从fmod开发包中，引入动态库和jar包,头文件

这里写图片描述

2.编写CMakeLists.txt文件

cmake_minimum_required(VERSION 3.4.1)set(distribution_dir ../../../../libs )find_library(   log-liblog )add_library(    fmodSHAREDIMPORTED )set_target_properties(  fmodPROPERTIES IMPORTED_LOCATION${distribution_dir}/${ANDROID_ABI}/libfmod.so)add_library(    fmodLSHAREDIMPORTED )set_target_properties(  fmodLPROPERTIES IMPORTED_LOCATION${distribution_dir}/${ANDROID_ABI}/libfmodL.so)set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")add_library(    stonevoicerSHAREDsrc/main/cpp/StoneVoicer.cpp )include_directories(src/main/cpp/inc)target_link_libraries(  stonevoicerfmodfmodL${log-lib} )

3.build.gradle中添加配置信息

 ndk{abiFilters "armeabi","x86","armeabi-v7a","arm64-v8a"}
sourceSets {main {jniLibs.srcDirs = ['libs']}
}

4.编写java代码

MainActivity:

public class MainActivity extends AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);requestPermission();FMOD.init(this);}private void  requestPermission(){if(ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED) {ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 100);}if(ContextCompat.checkSelfPermission(this,Manifest.permission.RECORD_AUDIO)!= PackageManager.PERMISSION_GRANTED) {ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO}, 200);}}public void mFix(View v) {//音频路径可以去获取麦克风的数据，我这里写死了String path = "file:///android_asset/xiaoxin.wav";switch (v.getId()) {case R.id.btn_normal:VoicerUtil.fix(path, VoicerUtil.MODE_NORMAL);break;case R.id.btn_luoli:VoicerUtil.fix(path, VoicerUtil.MODE_LUOLI);break;case R.id.btn_dashu:VoicerUtil.fix(path, VoicerUtil.MODE_DASHU);break;case R.id.btn_jingsong:VoicerUtil.fix(path, VoicerUtil.MODE_JINGSONG);break;case R.id.btn_gaoguai:VoicerUtil.fix(path, VoicerUtil.MODE_GAOGUAI);break;case R.id.btn_kongling:VoicerUtil.fix(path, VoicerUtil.MODE_KONGLING);break;default:break;}}@Overrideprotected void onDestroy() {super.onDestroy();FMOD.close();}
}

VoicerUtil:

public class VoicerUtil {public static final int MODE_NORMAL=0;public static final int MODE_LUOLI=1;public static final int MODE_DASHU=2;public static final int MODE_JINGSONG=3;public static final int MODE_GAOGUAI=4;public static final int MODE_KONGLING=5;/**** @param path* @param type*/public native static void fix(String path,int type);static{System.loadLibrary("fmod");System.loadLibrary("fmodL");System.loadLibrary("stonevoicer");}
}

5.生成头文件

我这边使用的是javah来生成的：

javah -classpath . -jni github.com.stonevoicer.VoicerUtil

然后将头文件移动到cpp文件夹下：

这里写图片描述

6.编写c++代码

#include <jni.h>
#include <string>
#include <stdlib.h>
#include "github_com_stonevoicer_VoicerUtil.h"
#include <fmod.hpp>
#include <unistd.h>#include <android/log.h>
#define LOGI(FORMAT,...) __android_log_print(ANDROID_LOG_INFO,"zph",FORMAT,##__VA_ARGS__);
#define LOGE(FORMAT,...) __android_log_print(ANDROID_LOG_ERROR,"zph",FORMAT,##__VA_ARGS__);#define MODE_NORMAL 0
#define MODE_LUOLI 1
#define MODE_DASHU 2
#define MODE_JINGSONG 3
#define MODE_GAOGUAI 4
#define MODE_KONGLING 5using namespace FMOD;JNIEXPORT void JNICALL Java_github_com_stonevoicer_VoicerUtil_fix(JNIEnv *env, jclass jcls, jstring path_jstr, jint mode){LOGI("%s", "===>start");System * system;Sound *sound;DSP *dsp;Channel *channel;float frequency;bool isplaying= true;System_Create(&system);system->init(32,FMOD_INIT_NORMAL,NULL);const char* path_cstr = env->GetStringUTFChars(path_jstr,NULL);try {system->createSound(path_cstr,FMOD_DEFAULT,NULL,&sound);switch (mode){case MODE_NORMAL:LOGI("%s", path_cstr);system->playSound(sound, 0, false, &channel);LOGI("%s", "fix normal");break;case MODE_LUOLI://dsp->音效//dsp 提升或者降低音调的一种音效system->createDSPByType(FMOD_DSP_TYPE_PITCHSHIFT, &dsp);dsp->setParameterFloat(FMOD_DSP_PITCHSHIFT_PITCH,8.0);system->playSound(sound, 0, false, &channel);channel->addDSP(0, dsp);break;case MODE_DASHU: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_JINGSONG:system->createDSPByType(FMOD_DSP_TYPE_TREMOLO, &dsp);dsp->setParameterFloat(FMOD_DSP_TREMOLO_SKEW, 5);system->playSound(sound, 0, false, &channel);channel->addDSP(0, dsp);break;case MODE_GAOGUAI://提高说话的速度system->playSound(sound, 0, false, &channel);channel->getFrequency(&frequency);frequency = frequency * 2;channel->setFrequency(frequency);break;case MODE_KONGLING://空灵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;}}catch (...){LOGE("%s", "发生异常");goto end;}system->update();while (isplaying){channel->isPlaying(&isplaying);usleep(1000 * 1000);}goto end;end:env->ReleaseStringUTFChars(path_jstr, path_cstr);sound->release();system->close();system->release();}

下面给出项目地址：StoneVoicer-Demo