前面将的都是如何使用C/C++文件生成so动态库,那么在使用别人的so动态库的时候应该怎么做呢?这篇文章就是使用一个变声功能的动态库,完成对于以有so动态库的说明。
在互联网中,有着许许多多动态库,很多厂商也对外提供动态库供开发者调用,例如高德地图的动态库,做地图开发的时候还是很方便的
本文主要讲一个可以使声音改变的动态库,这个动态库主要用于游戏中,游戏引擎中有使用到
这就是fmod动态库,首先我们要去下载其动态库文件
官网地址
先要注册才能下载其文件,按照步骤来就好
在其下载界面,有FMOD Studio API
,这里可以选择版本下载,我写这篇博客的时候,最新版本是1.10.07
,在这里就不下载最新的了,我选择的是1.08.28
,也就是1.08
的最后一个版本。
解压下载的文件,发现在api文件夹下有三个目录:fsbank
,lowlevel
,studio
这里选择lowlevel
,这是基于普遍使用选择的,也可以选择studio
,其功能更为强大,不过相对地也更需要运算性能
在Android项目中新建libs目录,将fmod.jar
拷贝至libs目录
新建jni目录,将armeabi
或armeabi-v7a
下的so文件拷贝至jni目录,将lowlevel
目录下的inc
头文件拷贝至jni文件夹,在这里先实现原声播放的功能,故在lowlevel
下的examples
下找到play_sound.cpp
源文件,将其放在jni目录下,打开文件得知,其依赖的common.h
头文件并不在inc
中,找到common.h
并拷贝至jni中,逐步寻找缺失的依赖文件,导入到jni中,整理完成后的jni文件目录如下:
│ Android.mk
│ common.cpp
│ common.h
│ common_platform.cpp
│ common_platform.h
│ libfmod.so
│ libfmodL.so
│ play_sound.cpp
└─inc
fmod.h
fmod.hpp
fmod_codec.h
fmod_common.h
fmod_dsp.h
fmod_dsp_effects.h
fmod_errors.h
fmod_output.h
在lowlevel
目录下,有Java的调用示例,在这里直接使用这个MainActivity.java
进行修改调用
阅读MainActivity.java
源代码,发现其使用的是动态获取权限,为方便使用,直接在清单文件中生命其权限,将其动态申请注释掉,在动态库加载时候,发现加载了一些没有的动态库,将没有的动态库去掉,加上自己的动态库,注意到jni中的调用方法和现有包名不统一,修改之,并将清单文件中的启动活动包名也修改
package org.fmod.example;
import android.os.Build;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Typeface;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.TextView;
import android.widget.Button;
import android.content.pm.PackageManager;
public class MainActivity extends Activity implements OnTouchListener, Runnable
{
private TextView mTxtScreen;
private Thread mThread;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// Create the text area
mTxtScreen = new TextView(this);
mTxtScreen.setTextSize(TypedValue.COMPLEX_UNIT_SP, 10.0f);
mTxtScreen.setTypeface(Typeface.MONOSPACE);
// Create the buttons
Button[] buttons = new Button[9];
for (int i = 0; i < buttons.length; i++)
{
buttons[i] = new Button(this);
buttons[i].setText(getButtonLabel(i));
buttons[i].setOnTouchListener(this);
buttons[i].setId(i);
}
// Create the button row layouts
LinearLayout llTopRowButtons = new LinearLayout(this);
llTopRowButtons.setOrientation(LinearLayout.HORIZONTAL);
LinearLayout llMiddleRowButtons = new LinearLayout(this);
llMiddleRowButtons.setOrientation(LinearLayout.HORIZONTAL);
LinearLayout llBottomRowButtons = new LinearLayout(this);
llBottomRowButtons.setOrientation(LinearLayout.HORIZONTAL);
// Create the main view layout
LinearLayout llView = new LinearLayout(this);
llView.setOrientation(LinearLayout.VERTICAL);
// Create layout parameters
LinearLayout.LayoutParams lpLayout = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f);
// Set up the view hierarchy
llTopRowButtons.addView(buttons[0], lpLayout);
llTopRowButtons.addView(buttons[6], lpLayout);
llTopRowButtons.addView(buttons[1], lpLayout);
llMiddleRowButtons.addView(buttons[4], lpLayout);
llMiddleRowButtons.addView(buttons[8], lpLayout);
llMiddleRowButtons.addView(buttons[5], lpLayout);
llBottomRowButtons.addView(buttons[2], lpLayout);
llBottomRowButtons.addView(buttons[7], lpLayout);
llBottomRowButtons.addView(buttons[3], lpLayout);
llView.addView(mTxtScreen, lpLayout);
llView.addView(llTopRowButtons);
llView.addView(llMiddleRowButtons);
llView.addView(llBottomRowButtons);
setContentView(llView);
// Request necessary permissions
// 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);
// }
// }
org.fmod.FMOD.init(this);
mThread = new Thread(this, "Example Main");
mThread.start();
setStateCreate();
}
@Override
protected void onStart()
{
super.onStart();
setStateStart();
}
@Override
protected void onStop()
{
setStateStop();
super.onStop();
}
@Override
protected void onDestroy()
{
setStateDestroy();
try
{
mThread.join();
}
catch (InterruptedException e) { }
org.fmod.FMOD.close();
super.onDestroy();
}
@Override
public boolean onTouch(View view, MotionEvent motionEvent)
{
if (motionEvent.getAction() == MotionEvent.ACTION_DOWN)
{
buttonDown(view.getId());
}
else if (motionEvent.getAction() == MotionEvent.ACTION_UP)
{
buttonUp(view.getId());
}
return true;
}
@Override
public void run()
{
main();
}
public void updateScreen(final String text)
{
runOnUiThread(new Runnable()
{
@Override
public void run()
{
mTxtScreen.setText(text);
}
});
}
private native String getButtonLabel(int index);
private native void buttonDown(int index);
private native void buttonUp(int index);
private native void setStateCreate();
private native void setStateStart();
private native void setStateStop();
private native void setStateDestroy();
private native void main();
static
{
/*
* To simplify our examples we try to load all possible FMOD
* libraries, the Android.mk will copy in the correct ones
* for each example. For real products you would just load
* 'fmod' and if you use the FMOD Studio tool you would also
* load 'fmodstudio'.
*/
// // Try debug libraries...
// try { System.loadLibrary("fmodD");
// System.loadLibrary("fmodstudioD"); }
// catch (UnsatisfiedLinkError e) { }
// // Try logging libraries...
// try { System.loadLibrary("fmodL");
// System.loadLibrary("fmodstudioL"); }
// catch (UnsatisfiedLinkError e) { }
// // Try release libraries...
// try { System.loadLibrary("fmod");
// System.loadLibrary("fmodstudio"); }
// catch (UnsatisfiedLinkError e) { }
//
// System.loadLibrary("stlport_shared");
// System.loadLibrary("example");
try {
System.loadLibrary("fmod");
System.loadLibrary("fmodL");
} catch (UnsatisfiedLinkError e) {
e.printStackTrace();
}
System.loadLibrary("VoiceChangeTest");
}
}
使用Android Tools
添加本地支持
修改Android.mk
文件,并记录动态库的文件名,将其加载至MainActivity.java
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := VoiceChangeTest
LOCAL_SRC_FILES := play_sound.cpp
include $(BUILD_SHARED_LIBRARY)
此时便可以编译项目了,编译时候会提示有些文件找不到,那是因为包含文件路径不对造成的,此时修改包含文件路径即可
文件包含错误解决以后,再次编译,发现很多函数找不到,此时是因为编译时候那些函数的实现没有编译到项目,修改Android.mk
文件,加入依赖实现
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := fmod
LOCAL_SRC_FILES := libfmod.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := fmodL
LOCAL_SRC_FILES := libfmodL.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := VoiceChangeTest
LOCAL_SRC_FILES := play_sound.cpp \
common_platform.cpp \
common.cpp
LOCAL_SHARED_LIBRARIES := fmod fmodL
include $(BUILD_SHARED_LIBRARY)
Application.mk
文件,写入以下配置APP_STL := gnustl_static
在大致了解fmod以后,就可以做一些基于fmod的项目了,正好QQ有一个变声的功能,这里就使用fmod去实现
直接将QQ安装包解压,就可以得到图片素材,将其加入到素材中
编写界面,这里直接采用他人布局好的文件
<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="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:orientation="vertical"
android:background="#FFF"
android:paddingBottom="20dp" >
<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/btn_normal"
style="@style/AudioImgStyle"
android:src="@drawable/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/btn_luoli"
style="@style/AudioImgStyle"
android:src="@drawable/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/btn_dashu"
style="@style/AudioImgStyle"
android:src="@drawable/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/btn_jingsong"
style="@style/AudioImgStyle"
android:src="@drawable/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/btn_gaoguai"
style="@style/AudioImgStyle"
android:src="@drawable/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/btn_kongling"
style="@style/AudioImgStyle"
android:src="@drawable/kongling"
android:onClick="mFix"/>
<TextView
style="@style/AudioTextStyle"
android:text="空灵"/>
LinearLayout>
LinearLayout>
LinearLayout>
RelativeLayout>
style文件
<resources>
<style name="AppBaseTheme" parent="android:Theme.Light">
style>
<style name="AppTheme" parent="AppBaseTheme">
style>
<style name="AudioImgStyle">
- "android:layout_width"
>wrap_content
- "android:layout_height">wrap_content
- "android:layout_marginLeft">25dp
- "android:layout_marginRight">25dp
style>
<style name="AudioTextStyle">
- "android:layout_width"
>wrap_content
- "android:layout_height">wrap_content
- "android:layout_marginTop">5dp
- "android:layout_gravity">center_horizontal
style>
resources>
主活动
package org.fmod.example;
import java.io.File;
import org.fmod.FMOD;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
public class QQActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FMOD.init(this);
setContentView(R.layout.activity_main);
}
public void mFix(View v) {
String path = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separatorChar + "test.wav";
Log.e("java cj5785", path);
switch (v.getId()) {
case R.id.btn_normal:
Log.d("cj5785", "normal");
QQVoice.fix(path, QQVoice.MODE_NORMAL);
break;
case R.id.btn_luoli:
Log.d("cj5785", "luoli");
QQVoice.fix(path, QQVoice.MODE_LUOLI);
break;
case R.id.btn_dashu:
Log.d("cj5785", "dashu");
QQVoice.fix(path, QQVoice.MODE_DASHU);
break;
case R.id.btn_jingsong:
Log.d("cj5785", "jingsong");
QQVoice.fix(path, QQVoice.MODE_JINGSONG);
break;
case R.id.btn_gaoguai:
Log.d("cj5785", "gaoguai");
QQVoice.fix(path, QQVoice.MODE_GAOGUAI);
break;
case R.id.btn_kongling:
Log.d("cj5785", "kongling");
QQVoice.fix(path, QQVoice.MODE_KONGLING);
break;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
FMOD.close();
}
}
工具类
package org.fmod.example;
public class QQVoice {
//音效的类型
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;
public native static void fix(String path, int type);
static {
System.loadLibrary("fmod");
System.loadLibrary("fmodL");
System.loadLibrary("QQVoice");
}
}
#include
#include
#include "inc/fmod.hpp"
#include "org_fmod_example_QQVoice.h"
#include
#define LOGD(FORMAT,...) __android_log_print(ANDROID_LOG_DEBUG,"cj5785",FORMAT,##__VA_ARGS__);
#define LOGE(FORMAT,...) __android_log_print(ANDROID_LOG_ERROR,"cj5785",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 5
using namespace FMOD;
JNIEXPORT void JNICALL Java_org_fmod_example_QQVoice_fix
(JNIEnv *env, jclass jcls, jstring jstr_path, jint type)
{
System *system;
Sound *sound;
Channel *channel;
DSP *dsp;
bool playing = true;
float frequency = 0.0F;
const char *path_cstr = env->GetStringUTFChars(jstr_path, NULL);
try{
//初始化
System_Create(&system);
system->init(32, FMOD_INIT_NORMAL, NULL);
//创建声音
system->createSound(path_cstr, FMOD_DEFAULT, NULL, &sound);
switch (type)
{
//原声
case MODE_NORMAL:
LOGD("%s", "NORMAL");
system->playSound(sound, 0, false, &channel);
break;
//萝莉
case MODE_LUOLI:
LOGD("%s", "LUOLI");
system->playSound(sound, 0, false, &channel);
system->createDSPByType(FMOD_DSP_TYPE_PITCHSHIFT, &dsp);
//设置音调
dsp->setParameterFloat(FMOD_DSP_PITCHSHIFT_PITCH, 2.5);
//添加至channel
channel->addDSP(0, dsp);
break;
//大叔
case MODE_DASHU:
LOGD("%s", "DASHU");
system->playSound(sound, 0, false, &channel);
system->createDSPByType(FMOD_DSP_TYPE_PITCHSHIFT, &dsp);
//设置音调
dsp->setParameterFloat(FMOD_DSP_PITCHSHIFT_PITCH, 0.7);
//添加至channel
channel->addDSP(0, dsp);
break;
//惊悚
case MODE_JINGSONG:
LOGD("%s", "JINGSONG");
system->playSound(sound, 0, false, &channel);
system->createDSPByType(FMOD_DSP_TYPE_TREMOLO, &dsp);
dsp->setParameterFloat(FMOD_DSP_TREMOLO_SKEW, 0.5);
channel->addDSP(0, dsp);
break;
//搞怪
case MODE_GAOGUAI:
LOGD("%s", "GAOGUAI");
system->playSound(sound, 0, false, &channel);
//提高说话速度
channel->getFrequency(&frequency);
frequency *= 2.3;
channel->setFrequency(frequency);
break;
//空灵
case MODE_KONGLING:
LOGD("%s", "KONGLING");
system->playSound(sound, 0, false, &channel);
system->createDSPByType(FMOD_DSP_TYPE_ECHO, &dsp);
dsp->setParameterFloat(FMOD_DSP_ECHO_DELAY, 300);
dsp->setParameterFloat(FMOD_DSP_ECHO_FEEDBACK, 50);
channel->addDSP(0, dsp);
break;
default:
break;
}
}catch(...){
LOGE("s", "异常状况发生");
goto End;
}
system->update();
while(playing)
{
channel->isPlaying(&playing);
usleep(1000 * 1000);
}
goto End;
End:
//释放资源
env->ReleaseStringUTFChars(jstr_path, path_cstr);
sound->release();
system->close();
system->release();
}
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := fmod
LOCAL_SRC_FILES := libfmod.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := fmodL
LOCAL_SRC_FILES := libfmodL.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := QQVoice
LOCAL_SRC_FILES := QQVoice.cpp
LOCAL_SHARED_LIBRARIES := fmod fmodL
LOCAL_LDLIBS := -llog
LOCAL_CPP_FEATURES := exceptions
include $(BUILD_SHARED_LIBRARY)
│ Android.mk
│ Application.mk
│ common.cpp
│ common.h
│ common_platform.cpp
│ common_platform.h
│ effects.cpp
│ libfmod.so
│ libfmodL.so
│ org_fmod_example_QQVoice.h
│ QQVoice.cpp
└─inc
fmod.h
fmod.hpp
fmod_codec.h
fmod_common.h
fmod_dsp.h
fmod_dsp_effects.h
fmod_errors.h
fmod_output.h