Create LICENSE

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "audio_mixer/src/main/cpp/oboe"]
+	path = audio_mixer/src/main/cpp/oboe
+	url = https://github.com/google/oboe

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 Rakibul Hasan Rajib
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

app/build.gradle

@@ -1,8 +1,7 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 29
-    buildToolsVersion "29.0.3"
+    compileSdkVersion 32
 
     defaultConfig {
         applicationId "zeroonezero.android.audiomixer"
@@ -29,11 +28,11 @@ android {
 
 dependencies {
     implementation fileTree(dir: "libs", include: ["*.jar"])
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    implementation 'androidx.appcompat:appcompat:1.5.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
 
     implementation project(":audio_mixer")
 

app/src/main/AndroidManifest.xml

@@ -13,7 +13,8 @@
         android:supportsRtl="true"
         android:requestLegacyExternalStorage="true"
         android:theme="@style/AppTheme">
-        <activity android:name="zeroonezero.android.audiomixer.MainActivity">
+        <activity android:name="zeroonezero.android.audiomixer.MainActivity"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/java/zeroonezero/android/audiomixer/MainActivity.java

@@ -9,7 +9,9 @@
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.pm.PackageManager;
+import android.media.AudioManager;
 import android.media.MediaMetadataRetriever;
+import android.media.MediaPlayer;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
@@ -18,6 +20,7 @@
 import android.view.View;
 import android.widget.Toast;
 
+import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
@@ -53,6 +56,13 @@ public void onClick(View v) {
             }
         });
 
+        findViewById(R.id.add_video_audio_btn).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                openVideoChooser();
+            }
+        });
+
         findViewById(R.id.mix_btn).setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -76,6 +86,19 @@ public void onClick(View v) {
             }
         });
 
+        findViewById(R.id.play_btn).setOnClickListener(v -> {
+            File file=new File(outputPath);
+            MediaPlayer mediaPlayer = new MediaPlayer();
+            mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
+            try {
+                mediaPlayer.setDataSource(getApplicationContext(), Uri.fromFile(file));
+                mediaPlayer.prepare();
+                mediaPlayer.start();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        });
+
         checkPermission();
     }
 
@@ -109,7 +132,7 @@ private void startMixing(){
         }catch (Exception e){
             e.printStackTrace();
         }
-        //audioMixer.setSampleRate(44100);  // optional
+        audioMixer.setSampleRate(48000);  // optional
         //audioMixer.setBitRate(128000); // optional
         //audioMixer.setChannelCount(2); // 1 or 2 // optional
         //audioMixer.setLoopingEnabled(true); // Only works for parallel mixing
@@ -163,6 +186,14 @@ public void openChooser(){
         startActivityForResult(intent, AUDIO_CHOOSE_REQUEST_CODE);
     }
 
+    public void openVideoChooser(){
+        Intent intent = new Intent();
+        intent.setType("video/*");
+        intent.setAction(Intent.ACTION_GET_CONTENT);
+        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+        startActivityForResult(intent, AUDIO_CHOOSE_REQUEST_CODE);
+    }
+
     @Override
     protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
         super.onActivityResult(requestCode, resultCode, data);
@@ -207,9 +238,10 @@ private boolean checkPermission() {
 
     @Override
     public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
         switch (requestCode) {
             case PERMISSION_REQUEST_CODE:
-                if (    grantResults.length > 1
+                if (grantResults.length > 1
                         && grantResults[0] == PackageManager.PERMISSION_GRANTED
                         && grantResults[1] == PackageManager.PERMISSION_GRANTED) {
 

app/src/main/res/layout/activity_main.xml

@@ -11,6 +11,12 @@
         android:orientation="vertical"
         android:layout_centerInParent="true">
 
+        <Button
+            android:id="@+id/add_video_audio_btn"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Add video audio"/>
+
         <Button
             android:id="@+id/add_audio_btn"
             android:layout_width="wrap_content"
@@ -29,6 +35,12 @@
             android:layout_height="wrap_content"
             android:text="Mix"/>
 
+        <Button
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:id="@+id/play_btn"
+            android:text="Play Audio File"/>
+
     </LinearLayout>
 
 </RelativeLayout>

audio_mixer/build.gradle

@@ -1,37 +1,77 @@
-apply plugin: 'com.android.library'
-
+plugins {
+    id 'com.android.library'
+    id 'maven-publish'
+}
 android {
-    compileSdkVersion 29
-    buildToolsVersion "29.0.3"
+    compileSdkVersion 32
 
     defaultConfig {
         minSdkVersion 18
-        targetSdkVersion 29
+        targetSdkVersion 32
         versionCode 1
-        versionName "1.0"
-
+        versionName "1.2"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles "consumer-rules.pro"
+        externalNativeBuild {
+            cmake {
+                cppFlags ""
+                arguments "-DRESAMPLER_OUTER_NAMESPACE=zeroonezero.android.audio_mixer -Wc++17-extensions"
+            }
+        }
     }
 
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
+        debug {
+            minifyEnabled false
+        }
     }
 
     compileOptions{
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+    externalNativeBuild {
+        cmake {
+            path file('src/main/cpp/CMakeLists.txt')
+            version '3.18.1'
+        }
+    }
+    publishing {
+        singleVariant('release') {
+        }
+        singleVariant('debug') {
+        }
+    }
 }
 
 dependencies {
     implementation fileTree(dir: "libs", include: ["*.jar"])
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    implementation 'androidx.appcompat:appcompat:1.5.0'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+
+}
+
+repositories {
+    mavenLocal()
+}
 
-}
+apply from: '../maven-publish-helper.gradle'
+
+publishing {
+    publications {
+        release(MavenPublication) {
+            groupId 'zeroonezero.android.audio_mixer'
+            artifactId = 'android_audio_mixer'
+        }
+        debug(MavenPublication) {
+            groupId 'zeroonezero.android.audio_mixer'
+            artifactId = 'android_audio_mixer-debug'
+        }
+    }
+}