Add OBB (zip) support (#15515)

* Add OBB support.
OBB must be a zip file with audio and video files stored uncompressed.

* Use introspection to be able to build with Android API level 10.
Using the new audio engine to play sounds from the OBB will only work with API level 12 (Android 3.1) or above.

cocos/audio/android/AudioEngine-inl.cpp

@@ -38,6 +38,7 @@
 #include "base/CCDirector.h"
 #include "base/CCScheduler.h"
 #include "platform/android/CCFileUtils-android.h"
+#include "platform/android/jni/Java_org_cocos2dx_lib_Cocos2dxHelper.h"
 
 using namespace cocos2d;
 using namespace cocos2d::experimental;
@@ -104,27 +105,31 @@ bool AudioPlayer::init(SLEngineItf engineEngine, SLObjectItf outputMixObject,con
         SLDataFormat_MIME format_mime = {SL_DATAFORMAT_MIME, NULL, SL_CONTAINERTYPE_UNSPECIFIED};
         audioSrc.pFormat = &format_mime;
 
-        if (fileFullPath[0] != '/'){
+        if (fileFullPath[0] != '/') {
-            std::string relativePath = "";
+            off_t start, length;
-
+            std::string relativePath;
             size_t position = fileFullPath.find("assets/");
+
             if (0 == position) {
                 // "assets/" is at the beginning of the path and we don't want it
-                relativePath += fileFullPath.substr(strlen("assets/"));
+                relativePath = fileFullPath.substr(strlen("assets/"));
             } else {
-                relativePath += fileFullPath;
+                relativePath = fileFullPath;
             }
 
-            auto asset = AAssetManager_open(cocos2d::FileUtilsAndroid::getAssetManager(), relativePath.c_str(), AASSET_MODE_UNKNOWN);
+            if (cocos2d::FileUtilsAndroid::getObbFile() != nullptr) {
-
+              _assetFd = getObbAssetFileDescriptorJNI(relativePath.c_str(), &start, &length);
-            // open asset as file descriptor
+            } else {
-            off_t start, length;
+                auto asset = AAssetManager_open(cocos2d::FileUtilsAndroid::getAssetManager(), relativePath.c_str(), AASSET_MODE_UNKNOWN);
-            _assetFd = AAsset_openFileDescriptor(asset, &start, &length);
+                // open asset as file descriptor
-            if (_assetFd <= 0){
+                _assetFd = AAsset_openFileDescriptor(asset, &start, &length);
                 AAsset_close(asset);
+            }
+
+            if (_assetFd <= 0) {
+                CCLOGERROR("Failed to open file descriptor for '%s'", fileFullPath.c_str());
                 break;
             }
-            AAsset_close(asset);
 
             // configure audio source
             loc_fd = {SL_DATALOCATOR_ANDROIDFD, _assetFd, start, length};

cocos/base/ZipUtils.cpp

@@ -645,6 +645,35 @@ unsigned char *ZipFile::getFileData(const std::string &fileName, ssize_t *size)
     return buffer;
 }
 
+bool ZipFile::getFileData(const std::string &fileName, ResizableBuffer* buffer)
+{
+    bool res = false;
+    do
+    {
+        CC_BREAK_IF(!_data->zipFile);
+        CC_BREAK_IF(fileName.empty());
+        
+        ZipFilePrivate::FileListContainer::const_iterator it = _data->fileList.find(fileName);
+        CC_BREAK_IF(it ==  _data->fileList.end());
+        
+        ZipEntryInfo fileInfo = it->second;
+        
+        int nRet = unzGoToFilePos(_data->zipFile, &fileInfo.pos);
+        CC_BREAK_IF(UNZ_OK != nRet);
+        
+        nRet = unzOpenCurrentFile(_data->zipFile);
+        CC_BREAK_IF(UNZ_OK != nRet);
+        
+        buffer->resize(fileInfo.uncompressed_size);
+        int CC_UNUSED nSize = unzReadCurrentFile(_data->zipFile, buffer->buffer(), static_cast<unsigned int>(fileInfo.uncompressed_size));
+        CCASSERT(nSize == 0 || nSize == (int)fileInfo.uncompressed_size, "the file size is wrong");
+        unzCloseCurrentFile(_data->zipFile);
+        res = true;
+    } while (0);
+    
+    return res;
+}
+
 std::string ZipFile::getFirstFilename()
 {
     if (unzGoToFirstFile(_data->zipFile) != UNZ_OK) return emptyFilename;

cocos/base/ZipUtils.h

@@ -31,6 +31,7 @@ THE SOFTWARE.
 #include "platform/CCPlatformConfig.h"
 #include "platform/CCPlatformMacros.h"
 #include "platform/CCPlatformDefine.h"
+#include "platform/CCFileUtils.h"
 
 #if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
 #include "platform/android/CCFileUtils-android.h"
@@ -276,6 +277,14 @@ typedef struct unz_file_info_s unz_file_info;
         */
         unsigned char *getFileData(const std::string &fileName, ssize_t *size);
         
+        /**
+        * Get resource file data from a zip file.
+        * @param fileName File name
+        * @param[out] buffer If the file read operation succeeds, if will contain the file data.
+        * @return True if successful.
+        */
+        bool getFileData(const std::string &fileName, ResizableBuffer* buffer);
+
         std::string getFirstFilename();
         std::string getNextFilename();
         

cocos/platform/android/CCFileUtils-android.cpp

@@ -29,8 +29,10 @@ THE SOFTWARE.
 #include "platform/android/CCFileUtils-android.h"
 #include "platform/CCCommon.h"
 #include "platform/android/jni/JniHelper.h"
+#include "platform/android/jni/Java_org_cocos2dx_lib_Cocos2dxHelper.h"
 #include "android/asset_manager.h"
 #include "android/asset_manager_jni.h"
+#include "base/ZipUtils.h"
 #include <stdlib.h>
 #include <sys/stat.h>
 
@@ -42,6 +44,7 @@ using namespace std;
 NS_CC_BEGIN
 
 AAssetManager* FileUtilsAndroid::assetmanager = nullptr;
+ZipFile* FileUtilsAndroid::obbfile = nullptr;
 
 void FileUtilsAndroid::setassetmanager(AAssetManager* a) {
     if (nullptr == a) {
@@ -57,7 +60,7 @@ FileUtils* FileUtils::getInstance()
     if (s_sharedFileUtils == nullptr)
     {
         s_sharedFileUtils = new FileUtilsAndroid();
-        if(!s_sharedFileUtils->init())
+        if (!s_sharedFileUtils->init())
         {
           delete s_sharedFileUtils;
           s_sharedFileUtils = nullptr;
@@ -73,12 +76,23 @@ FileUtilsAndroid::FileUtilsAndroid()
 
 FileUtilsAndroid::~FileUtilsAndroid()
 {
+    if (obbfile)
+    {
+        delete obbfile;
+        obbfile = nullptr;
+    }
 }
 
 bool FileUtilsAndroid::init()
 {
     _defaultResRootPath = "assets/";
     
+    std::string assetsPath(getApkPath());
+    if (assetsPath.find("/obb/") != std::string::npos)
+    {
+        obbfile = new ZipFile(assetsPath);
+    }
+
     return FileUtils::init();
 }
 
@@ -149,9 +163,14 @@ bool FileUtilsAndroid::isFileExistInternal(const std::string& strFilePath) const
         const char* s = strFilePath.c_str();
 
         // Found "assets/" at the beginning of the path and we don't want it
-        if (strFilePath.find(_defaultResRootPath) == 0) s += strlen("assets/");
+        if (strFilePath.find(_defaultResRootPath) == 0) s += _defaultResRootPath.length();
         
-        if (FileUtilsAndroid::assetmanager) {
+        if (obbfile && obbfile->fileExists(s))
+        {
+            bFound = true;
+        }
+        else if (FileUtilsAndroid::assetmanager)
+        {
             AAsset* aa = AAssetManager_open(FileUtilsAndroid::assetmanager, s, AASSET_MODE_UNKNOWN);
             if (aa)
             {
@@ -165,7 +184,7 @@ bool FileUtilsAndroid::isFileExistInternal(const std::string& strFilePath) const
     else
     {
         FILE *fp = fopen(strFilePath.c_str(), "r");
-        if(fp)
+        if (fp)
         {
             bFound = true;
             fclose(fp);
@@ -250,6 +269,12 @@ FileUtils::Status FileUtilsAndroid::getContents(const std::string& filename, Res
         relativePath = fullPath;
     }
     
+    if (obbfile)
+    {
+        if (obbfile->getFileData(relativePath, buffer))
+            return FileUtils::Status::OK;
+    }
+
     if (nullptr == assetmanager) {
         LOGD("... FileUtilsAndroid::assetmanager is nullptr");
         return FileUtils::Status::NotInitialized;

cocos/platform/android/CCFileUtils-android.h

@@ -38,6 +38,8 @@ Copyright (c) 2013-2014 Chukong Technologies Inc.
 
 NS_CC_BEGIN
 
+class ZipFile;
+
 /**
  * @addtogroup platform
  * @{
@@ -57,6 +59,7 @@ public:
 
     static void setassetmanager(AAssetManager* a);
     static AAssetManager* getAssetManager() { return assetmanager; }
+    static ZipFile* getObbFile() { return obbfile; }
 
     /* override functions */
     bool init() override;
@@ -73,6 +76,7 @@ private:
     virtual bool isDirectoryExistInternal(const std::string& dirPath) const override;
 
     static AAssetManager* assetmanager;
+    static ZipFile* obbfile;
 };
 
 // end of platform group

cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxHelper.java

@@ -31,19 +31,31 @@ import android.content.Intent;
 import android.content.ServiceConnection;
 import android.content.SharedPreferences;
 import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.content.res.AssetFileDescriptor;
 import android.content.res.AssetManager;
 import android.net.Uri;
 import android.os.Build;
+import android.os.Environment;
 import android.os.IBinder;
+import android.os.ParcelFileDescriptor;
 import android.os.Vibrator;
 import android.preference.PreferenceManager.OnActivityResultListener;
 import android.util.DisplayMetrics;
+import android.util.Log;
 import android.view.Display;
 import android.view.WindowManager;
 
+import com.android.vending.expansion.zipfile.APKExpansionSupport;
+import com.android.vending.expansion.zipfile.ZipResourceFile;
+
 import com.enhance.gameservice.IGameTuningService;
 
+import java.io.IOException;
+import java.io.File;
 import java.io.UnsupportedEncodingException;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.util.LinkedHashSet;
 import java.util.Locale;
 import java.util.Map;
@@ -55,6 +67,7 @@ public class Cocos2dxHelper {
     // ===========================================================
     private static final String PREFS_NAME = "Cocos2dxPrefsFile";
     private static final int RUNNABLES_PER_FRAME = 5;
+    private static final String TAG = Cocos2dxHelper.class.getSimpleName();
 
     // ===========================================================
     // Fields
@@ -77,6 +90,12 @@ public class Cocos2dxHelper {
     private static final int BOOST_TIME = 7;
     //Enhance API modification end
 
+    // The absolute path to the OBB if it exists, else the absolute path to the APK.
+    private static String sAssetsPath = "";
+    
+    // The OBB file
+    private static ZipResourceFile sOBBFile = null;
+
     // ===========================================================
     // Constructors
     // ===========================================================
@@ -95,7 +114,7 @@ public class Cocos2dxHelper {
             Cocos2dxHelper.sPackageName = applicationInfo.packageName;
             Cocos2dxHelper.sFileDirectory = activity.getFilesDir().getAbsolutePath();
             
-            Cocos2dxHelper.nativeSetApkPath(applicationInfo.sourceDir);
+            Cocos2dxHelper.nativeSetApkPath(Cocos2dxHelper.getAssetsPath());
     
             Cocos2dxHelper.sCocos2dxAccelerometer = new Cocos2dxAccelerometer(activity);
             Cocos2dxHelper.sCocos2dMusic = new Cocos2dxMusic(activity);
@@ -114,9 +133,48 @@ public class Cocos2dxHelper {
             serviceIntent.setPackage("com.enhance.gameservice");
             boolean suc = activity.getApplicationContext().bindService(serviceIntent, connection, Context.BIND_AUTO_CREATE);
             //Enhance API modification end
+            
+            int versionCode = 1;
+            try {
+                versionCode = Cocos2dxActivity.getContext().getPackageManager().getPackageInfo(Cocos2dxHelper.getCocos2dxPackageName(), 0).versionCode;
+            } catch (NameNotFoundException e) {
+                e.printStackTrace();
+            }
+            try {
+                Cocos2dxHelper.sOBBFile = APKExpansionSupport.getAPKExpansionZipFile(Cocos2dxActivity.getContext(), versionCode, 0);
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
         }
     }
     
+    // This function returns the absolute path to the OBB if it exists,
+    // else it returns the absolute path to the APK.
+    public static String getAssetsPath()
+    {
+        if (Cocos2dxHelper.sAssetsPath == "") {
+            int versionCode = 1;
+            try {
+                versionCode = Cocos2dxHelper.sActivity.getPackageManager().getPackageInfo(Cocos2dxHelper.sPackageName, 0).versionCode;
+            } catch (NameNotFoundException e) {
+                e.printStackTrace();
+            }
+            String pathToOBB = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/obb/" + Cocos2dxHelper.sPackageName + "/main." + versionCode + "." + Cocos2dxHelper.sPackageName + ".obb";
+            File obbFile = new File(pathToOBB);
+            if (obbFile.exists())
+                Cocos2dxHelper.sAssetsPath = pathToOBB;
+            else
+                Cocos2dxHelper.sAssetsPath = Cocos2dxHelper.sActivity.getApplicationInfo().sourceDir;
+        }
+        
+        return Cocos2dxHelper.sAssetsPath;
+    }
+    
+    public static ZipResourceFile getObbFile()
+    {
+        return Cocos2dxHelper.sOBBFile;
+    }
+    
     //Enhance API modification begin
     private static ServiceConnection connection = new ServiceConnection() {
         public void onServiceConnected(ComponentName name, IBinder service) {
@@ -227,6 +285,29 @@ public class Cocos2dxHelper {
         return ret;
     }
     
+    public static long[] getObbAssetFileDescriptor(final String path) {
+        long[] array = new long[3];
+        if (Cocos2dxHelper.sOBBFile != null) {
+            AssetFileDescriptor descriptor = Cocos2dxHelper.sOBBFile.getAssetFileDescriptor(path);
+            if (descriptor != null) {
+                try {
+                    ParcelFileDescriptor parcel = descriptor.getParcelFileDescriptor();
+                    Method method = parcel.getClass().getMethod("getFd", new Class[] {});
+                    array[0] = (Integer)method.invoke(parcel);
+                    array[1] = descriptor.getStartOffset();
+                    array[2] = descriptor.getLength();
+                } catch (NoSuchMethodException e) {
+                    Log.e(Cocos2dxHelper.TAG, "Accessing file descriptor directly from the OBB is only supported from Android 3.1 (API level 12) and above.");
+                } catch (IllegalAccessException e) {
+                    Log.e(Cocos2dxHelper.TAG, e.toString());
+                } catch (InvocationTargetException e) {
+                    Log.e(Cocos2dxHelper.TAG, e.toString());
+                }
+            }
+        }
+        return array;
+    }
+
     public static void preloadBackgroundMusic(final String pPath) {
         Cocos2dxHelper.sCocos2dMusic.preloadBackgroundMusic(pPath);
     }

cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxMusic.java

@@ -29,6 +29,9 @@ import android.content.Context;
 import android.content.res.AssetFileDescriptor;
 import android.media.MediaPlayer;
 import android.util.Log;
+import android.content.res.AssetFileDescriptor;
+import com.android.vending.expansion.zipfile.APKExpansionSupport;
+import com.android.vending.expansion.zipfile.ZipResourceFile;
 
 import java.io.FileInputStream;
 
@@ -134,8 +137,8 @@ public class Cocos2dxMusic {
 
     public void stopBackgroundMusic() {
         if (this.mBackgroundMediaPlayer != null) {
-        	mBackgroundMediaPlayer.release();
+            mBackgroundMediaPlayer.release();
-        	mBackgroundMediaPlayer = createMediaplayer(mCurrentPath);
+            mBackgroundMediaPlayer = createMediaplayer(mCurrentPath);
             
             /**
              * should set the state, if not, the following sequence will be error
@@ -163,7 +166,7 @@ public class Cocos2dxMusic {
 
     public void rewindBackgroundMusic() {
         if (this.mBackgroundMediaPlayer != null) {
-        	playBackgroundMusic(mCurrentPath, mIsLoop);
+            playBackgroundMusic(mCurrentPath, mIsLoop);
         }
     }
 
@@ -250,8 +253,13 @@ public class Cocos2dxMusic {
                 mediaPlayer.setDataSource(fis.getFD());
                 fis.close();
             } else {
-                final AssetFileDescriptor assetFileDescritor = this.mContext.getAssets().openFd(path);
+                if (Cocos2dxHelper.getObbFile() != null) {
-                mediaPlayer.setDataSource(assetFileDescritor.getFileDescriptor(), assetFileDescritor.getStartOffset(), assetFileDescritor.getLength());
+                    final AssetFileDescriptor assetFileDescriptor = Cocos2dxHelper.getObbFile().getAssetFileDescriptor(path);
+                    mediaPlayer.setDataSource(assetFileDescriptor.getFileDescriptor(), assetFileDescriptor.getStartOffset(), assetFileDescriptor.getLength());
+                } else {
+                    final AssetFileDescriptor assetFileDescriptor = this.mContext.getAssets().openFd(path);
+                    mediaPlayer.setDataSource(assetFileDescriptor.getFileDescriptor(), assetFileDescriptor.getStartOffset(), assetFileDescriptor.getLength());
+                }
             }
 
             mediaPlayer.prepare();

cocos/platform/android/java/src/org/cocos2dx/lib/Cocos2dxSound.java

@@ -28,6 +28,9 @@ import android.content.Context;
 import android.media.AudioManager;
 import android.media.SoundPool;
 import android.util.Log;
+import android.content.res.AssetFileDescriptor;
+import com.android.vending.expansion.zipfile.APKExpansionSupport;
+import com.android.vending.expansion.zipfile.ZipResourceFile;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -273,7 +276,12 @@ public class Cocos2dxSound {
             if (path.startsWith("/")) {
                 soundID = this.mSoundPool.load(path, 0);
             } else {
-                soundID = this.mSoundPool.load(this.mContext.getAssets().openFd(path), 0);
+                if (Cocos2dxHelper.getObbFile() != null) {
+                    final AssetFileDescriptor assetFileDescriptor = Cocos2dxHelper.getObbFile().getAssetFileDescriptor(path);
+                    soundID = mSoundPool.load(assetFileDescriptor, 0);
+                } else {
+                    soundID = this.mSoundPool.load(this.mContext.getAssets().openFd(path), 0);
+                }
             }
         } catch (final Exception e) {
             soundID = Cocos2dxSound.INVALID_SOUND_ID;

cocos/platform/android/jni/Java_org_cocos2dx_lib_Cocos2dxHelper.cpp

@@ -87,6 +87,31 @@ std::string getPackageNameJNI() {
     return JniHelper::callStaticStringMethod(className, "getCocos2dxPackageName");
 }
 
+int getObbAssetFileDescriptorJNI(const char* path, long* startOffset, long* size) {
+    JniMethodInfo methodInfo;
+    int fd = 0;
+    
+    if (JniHelper::getStaticMethodInfo(methodInfo, className.c_str(), "getObbAssetFileDescriptor", "(Ljava/lang/String;)[J")) {
+        jstring stringArg = methodInfo.env->NewStringUTF(path);
+        jlongArray newArray = (jlongArray)methodInfo.env->CallStaticObjectMethod(methodInfo.classID, methodInfo.methodID, stringArg);
+        jsize theArrayLen = methodInfo.env->GetArrayLength(newArray);
+        
+        if (theArrayLen == 3) {
+            jboolean copy = JNI_FALSE;
+            jlong *array = methodInfo.env->GetLongArrayElements(newArray, &copy);
+            fd = static_cast<int>(array[0]);
+            *startOffset = array[1];
+            *size = array[2];
+            methodInfo.env->ReleaseLongArrayElements(newArray, array, 0);
+        }
+        
+        methodInfo.env->DeleteLocalRef(methodInfo.classID);
+        methodInfo.env->DeleteLocalRef(stringArg);
+    }
+    
+    return fd;
+}
+
 void conversionEncodingJNI(const char* src, int byteSize, const char* fromCharset, char* dst, const char* newCharset)
 {
     JniMethodInfo methodInfo;

cocos/platform/android/jni/Java_org_cocos2dx_lib_Cocos2dxHelper.h

@@ -31,6 +31,7 @@ typedef void (*EditTextCallback)(const char* text, void* ctx);
 
 extern const char * getApkPath();
 extern std::string getPackageNameJNI();
+extern int getObbAssetFileDescriptorJNI(const char* path, long* startOffset, long* size);
 extern void conversionEncodingJNI(const char* src, int byteSize, const char* fromCharset, char* dst, const char* newCharset);
 
 #endif /* __Java_org_cocos2dx_lib_Cocos2dxHelper_H__ */

licenses/LICENSE_com.android.vending.expansion.zipfile.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
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+      on behalf of whom a Contribution has been received by Licensor and
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+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
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