The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* //device/libs/media_jni/MediaScanner.cpp |
| 2 | ** |
| 3 | ** Copyright 2007, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #define LOG_TAG "MediaScanner" |
| 19 | #include "utils/Log.h" |
| 20 | |
| 21 | #include <media/mediascanner.h> |
| 22 | #include <stdio.h> |
| 23 | #include <assert.h> |
| 24 | #include <limits.h> |
| 25 | #include <unistd.h> |
| 26 | #include <fcntl.h> |
Andreas Huber | e4a8380 | 2010-01-08 10:57:34 -0800 | [diff] [blame] | 27 | #include <cutils/properties.h> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 28 | #include <utils/threads.h> |
| 29 | |
| 30 | #include "jni.h" |
| 31 | #include "JNIHelp.h" |
| 32 | #include "android_runtime/AndroidRuntime.h" |
| 33 | |
Andreas Huber | e4a8380 | 2010-01-08 10:57:34 -0800 | [diff] [blame] | 34 | #include <media/stagefright/StagefrightMediaScanner.h> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 35 | |
| 36 | // ---------------------------------------------------------------------------- |
| 37 | |
| 38 | using namespace android; |
| 39 | |
| 40 | // ---------------------------------------------------------------------------- |
| 41 | |
| 42 | struct fields_t { |
| 43 | jfieldID context; |
| 44 | }; |
| 45 | static fields_t fields; |
| 46 | |
| 47 | // ---------------------------------------------------------------------------- |
| 48 | |
| 49 | class MyMediaScannerClient : public MediaScannerClient |
| 50 | { |
| 51 | public: |
| 52 | MyMediaScannerClient(JNIEnv *env, jobject client) |
| 53 | : mEnv(env), |
| 54 | mClient(env->NewGlobalRef(client)), |
| 55 | mScanFileMethodID(0), |
| 56 | mHandleStringTagMethodID(0), |
| 57 | mSetMimeTypeMethodID(0) |
| 58 | { |
| 59 | jclass mediaScannerClientInterface = env->FindClass("android/media/MediaScannerClient"); |
| 60 | if (mediaScannerClientInterface == NULL) { |
| 61 | fprintf(stderr, "android/media/MediaScannerClient not found\n"); |
| 62 | } |
| 63 | else { |
| 64 | mScanFileMethodID = env->GetMethodID(mediaScannerClientInterface, "scanFile", |
| 65 | "(Ljava/lang/String;JJ)V"); |
| 66 | mHandleStringTagMethodID = env->GetMethodID(mediaScannerClientInterface, "handleStringTag", |
| 67 | "(Ljava/lang/String;Ljava/lang/String;)V"); |
| 68 | mSetMimeTypeMethodID = env->GetMethodID(mediaScannerClientInterface, "setMimeType", |
| 69 | "(Ljava/lang/String;)V"); |
Marco Nelissen | 8b04661 | 2009-09-03 10:49:55 -0700 | [diff] [blame] | 70 | mAddNoMediaFolderMethodID = env->GetMethodID(mediaScannerClientInterface, "addNoMediaFolder", |
| 71 | "(Ljava/lang/String;)V"); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 72 | } |
| 73 | } |
| 74 | |
| 75 | virtual ~MyMediaScannerClient() |
| 76 | { |
| 77 | mEnv->DeleteGlobalRef(mClient); |
| 78 | } |
| 79 | |
| 80 | // returns true if it succeeded, false if an exception occured in the Java code |
| 81 | virtual bool scanFile(const char* path, long long lastModified, long long fileSize) |
| 82 | { |
| 83 | jstring pathStr; |
| 84 | if ((pathStr = mEnv->NewStringUTF(path)) == NULL) return false; |
| 85 | |
| 86 | mEnv->CallVoidMethod(mClient, mScanFileMethodID, pathStr, lastModified, fileSize); |
| 87 | |
| 88 | mEnv->DeleteLocalRef(pathStr); |
| 89 | return (!mEnv->ExceptionCheck()); |
| 90 | } |
| 91 | |
| 92 | // returns true if it succeeded, false if an exception occured in the Java code |
| 93 | virtual bool handleStringTag(const char* name, const char* value) |
| 94 | { |
| 95 | jstring nameStr, valueStr; |
| 96 | if ((nameStr = mEnv->NewStringUTF(name)) == NULL) return false; |
| 97 | if ((valueStr = mEnv->NewStringUTF(value)) == NULL) return false; |
| 98 | |
| 99 | mEnv->CallVoidMethod(mClient, mHandleStringTagMethodID, nameStr, valueStr); |
| 100 | |
| 101 | mEnv->DeleteLocalRef(nameStr); |
| 102 | mEnv->DeleteLocalRef(valueStr); |
| 103 | return (!mEnv->ExceptionCheck()); |
| 104 | } |
| 105 | |
| 106 | // returns true if it succeeded, false if an exception occured in the Java code |
| 107 | virtual bool setMimeType(const char* mimeType) |
| 108 | { |
| 109 | jstring mimeTypeStr; |
| 110 | if ((mimeTypeStr = mEnv->NewStringUTF(mimeType)) == NULL) return false; |
| 111 | |
| 112 | mEnv->CallVoidMethod(mClient, mSetMimeTypeMethodID, mimeTypeStr); |
| 113 | |
| 114 | mEnv->DeleteLocalRef(mimeTypeStr); |
| 115 | return (!mEnv->ExceptionCheck()); |
| 116 | } |
| 117 | |
Marco Nelissen | 8b04661 | 2009-09-03 10:49:55 -0700 | [diff] [blame] | 118 | // returns true if it succeeded, false if an exception occured in the Java code |
| 119 | virtual bool addNoMediaFolder(const char* path) |
| 120 | { |
| 121 | jstring pathStr; |
| 122 | if ((pathStr = mEnv->NewStringUTF(path)) == NULL) return false; |
| 123 | |
| 124 | mEnv->CallVoidMethod(mClient, mAddNoMediaFolderMethodID, pathStr); |
| 125 | |
| 126 | mEnv->DeleteLocalRef(pathStr); |
| 127 | return (!mEnv->ExceptionCheck()); |
| 128 | } |
| 129 | |
| 130 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 131 | private: |
| 132 | JNIEnv *mEnv; |
| 133 | jobject mClient; |
| 134 | jmethodID mScanFileMethodID; |
| 135 | jmethodID mHandleStringTagMethodID; |
| 136 | jmethodID mSetMimeTypeMethodID; |
Marco Nelissen | 8b04661 | 2009-09-03 10:49:55 -0700 | [diff] [blame] | 137 | jmethodID mAddNoMediaFolderMethodID; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 138 | }; |
| 139 | |
| 140 | |
| 141 | // ---------------------------------------------------------------------------- |
| 142 | |
| 143 | static bool ExceptionCheck(void* env) |
| 144 | { |
| 145 | return ((JNIEnv *)env)->ExceptionCheck(); |
| 146 | } |
| 147 | |
| 148 | static void |
Mike Lockwood | c37255d | 2010-09-10 14:47:36 -0400 | [diff] [blame^] | 149 | android_media_MediaScanner_processDirectory(JNIEnv *env, jobject thiz, jstring path, jobject client) |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 150 | { |
| 151 | MediaScanner *mp = (MediaScanner *)env->GetIntField(thiz, fields.context); |
| 152 | |
| 153 | if (path == NULL) { |
| 154 | jniThrowException(env, "java/lang/IllegalArgumentException", NULL); |
| 155 | return; |
| 156 | } |
Mike Lockwood | c37255d | 2010-09-10 14:47:36 -0400 | [diff] [blame^] | 157 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 158 | const char *pathStr = env->GetStringUTFChars(path, NULL); |
| 159 | if (pathStr == NULL) { // Out of memory |
| 160 | jniThrowException(env, "java/lang/RuntimeException", "Out of memory"); |
| 161 | return; |
| 162 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 163 | |
| 164 | MyMediaScannerClient myClient(env, client); |
Mike Lockwood | c37255d | 2010-09-10 14:47:36 -0400 | [diff] [blame^] | 165 | mp->processDirectory(pathStr, myClient, ExceptionCheck, env); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 166 | env->ReleaseStringUTFChars(path, pathStr); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | static void |
| 170 | android_media_MediaScanner_processFile(JNIEnv *env, jobject thiz, jstring path, jstring mimeType, jobject client) |
| 171 | { |
| 172 | MediaScanner *mp = (MediaScanner *)env->GetIntField(thiz, fields.context); |
| 173 | |
| 174 | if (path == NULL) { |
| 175 | jniThrowException(env, "java/lang/IllegalArgumentException", NULL); |
| 176 | return; |
| 177 | } |
| 178 | |
| 179 | const char *pathStr = env->GetStringUTFChars(path, NULL); |
| 180 | if (pathStr == NULL) { // Out of memory |
| 181 | jniThrowException(env, "java/lang/RuntimeException", "Out of memory"); |
| 182 | return; |
| 183 | } |
| 184 | const char *mimeTypeStr = (mimeType ? env->GetStringUTFChars(mimeType, NULL) : NULL); |
| 185 | if (mimeType && mimeTypeStr == NULL) { // Out of memory |
| 186 | env->ReleaseStringUTFChars(path, pathStr); |
| 187 | jniThrowException(env, "java/lang/RuntimeException", "Out of memory"); |
| 188 | return; |
| 189 | } |
| 190 | |
| 191 | MyMediaScannerClient myClient(env, client); |
| 192 | mp->processFile(pathStr, mimeTypeStr, myClient); |
| 193 | env->ReleaseStringUTFChars(path, pathStr); |
| 194 | if (mimeType) { |
| 195 | env->ReleaseStringUTFChars(mimeType, mimeTypeStr); |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | static void |
| 200 | android_media_MediaScanner_setLocale(JNIEnv *env, jobject thiz, jstring locale) |
| 201 | { |
| 202 | MediaScanner *mp = (MediaScanner *)env->GetIntField(thiz, fields.context); |
| 203 | |
| 204 | if (locale == NULL) { |
| 205 | jniThrowException(env, "java/lang/IllegalArgumentException", NULL); |
| 206 | return; |
| 207 | } |
| 208 | const char *localeStr = env->GetStringUTFChars(locale, NULL); |
| 209 | if (localeStr == NULL) { // Out of memory |
| 210 | jniThrowException(env, "java/lang/RuntimeException", "Out of memory"); |
| 211 | return; |
| 212 | } |
| 213 | mp->setLocale(localeStr); |
| 214 | |
| 215 | env->ReleaseStringUTFChars(locale, localeStr); |
| 216 | } |
| 217 | |
| 218 | static jbyteArray |
| 219 | android_media_MediaScanner_extractAlbumArt(JNIEnv *env, jobject thiz, jobject fileDescriptor) |
| 220 | { |
| 221 | MediaScanner *mp = (MediaScanner *)env->GetIntField(thiz, fields.context); |
| 222 | |
| 223 | if (fileDescriptor == NULL) { |
| 224 | jniThrowException(env, "java/lang/IllegalArgumentException", NULL); |
| 225 | return NULL; |
| 226 | } |
| 227 | |
| 228 | int fd = getParcelFileDescriptorFD(env, fileDescriptor); |
| 229 | char* data = mp->extractAlbumArt(fd); |
| 230 | if (!data) { |
| 231 | return NULL; |
| 232 | } |
| 233 | long len = *((long*)data); |
| 234 | |
| 235 | jbyteArray array = env->NewByteArray(len); |
| 236 | if (array != NULL) { |
| 237 | jbyte* bytes = env->GetByteArrayElements(array, NULL); |
| 238 | memcpy(bytes, data + 4, len); |
| 239 | env->ReleaseByteArrayElements(array, bytes, 0); |
| 240 | } |
| 241 | |
| 242 | done: |
| 243 | free(data); |
| 244 | // if NewByteArray() returned NULL, an out-of-memory |
| 245 | // exception will have been raised. I just want to |
| 246 | // return null in that case. |
| 247 | env->ExceptionClear(); |
| 248 | return array; |
| 249 | } |
| 250 | |
Marco Nelissen | 4935d05 | 2009-08-03 11:12:58 -0700 | [diff] [blame] | 251 | // This function gets a field ID, which in turn causes class initialization. |
| 252 | // It is called from a static block in MediaScanner, which won't run until the |
| 253 | // first time an instance of this class is used. |
| 254 | static void |
| 255 | android_media_MediaScanner_native_init(JNIEnv *env) |
| 256 | { |
| 257 | jclass clazz; |
| 258 | |
| 259 | clazz = env->FindClass("android/media/MediaScanner"); |
| 260 | if (clazz == NULL) { |
| 261 | jniThrowException(env, "java/lang/RuntimeException", "Can't find android/media/MediaScanner"); |
| 262 | return; |
| 263 | } |
| 264 | |
| 265 | fields.context = env->GetFieldID(clazz, "mNativeContext", "I"); |
| 266 | if (fields.context == NULL) { |
| 267 | jniThrowException(env, "java/lang/RuntimeException", "Can't find MediaScanner.mNativeContext"); |
| 268 | return; |
| 269 | } |
| 270 | } |
| 271 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 272 | static void |
| 273 | android_media_MediaScanner_native_setup(JNIEnv *env, jobject thiz) |
| 274 | { |
Andreas Huber | 8d65dd2 | 2010-06-23 16:40:57 -0700 | [diff] [blame] | 275 | MediaScanner *mp = new StagefrightMediaScanner; |
Andreas Huber | bfb9fb1 | 2009-12-03 11:31:19 -0800 | [diff] [blame] | 276 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 277 | if (mp == NULL) { |
| 278 | jniThrowException(env, "java/lang/RuntimeException", "Out of memory"); |
| 279 | return; |
| 280 | } |
| 281 | |
| 282 | env->SetIntField(thiz, fields.context, (int)mp); |
| 283 | } |
| 284 | |
| 285 | static void |
| 286 | android_media_MediaScanner_native_finalize(JNIEnv *env, jobject thiz) |
| 287 | { |
| 288 | MediaScanner *mp = (MediaScanner *)env->GetIntField(thiz, fields.context); |
| 289 | |
| 290 | //printf("##### android_media_MediaScanner_native_finalize: ctx=0x%p\n", ctx); |
| 291 | |
| 292 | if (mp == 0) |
| 293 | return; |
| 294 | |
| 295 | delete mp; |
| 296 | } |
| 297 | |
| 298 | // ---------------------------------------------------------------------------- |
| 299 | |
| 300 | static JNINativeMethod gMethods[] = { |
Mike Lockwood | c37255d | 2010-09-10 14:47:36 -0400 | [diff] [blame^] | 301 | {"processDirectory", "(Ljava/lang/String;Landroid/media/MediaScannerClient;)V", |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 302 | (void *)android_media_MediaScanner_processDirectory}, |
Mike Lockwood | c37255d | 2010-09-10 14:47:36 -0400 | [diff] [blame^] | 303 | {"processFile", "(Ljava/lang/String;Ljava/lang/String;Landroid/media/MediaScannerClient;)V", |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 304 | (void *)android_media_MediaScanner_processFile}, |
| 305 | {"setLocale", "(Ljava/lang/String;)V", (void *)android_media_MediaScanner_setLocale}, |
| 306 | {"extractAlbumArt", "(Ljava/io/FileDescriptor;)[B", (void *)android_media_MediaScanner_extractAlbumArt}, |
Marco Nelissen | 4935d05 | 2009-08-03 11:12:58 -0700 | [diff] [blame] | 307 | {"native_init", "()V", (void *)android_media_MediaScanner_native_init}, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 308 | {"native_setup", "()V", (void *)android_media_MediaScanner_native_setup}, |
| 309 | {"native_finalize", "()V", (void *)android_media_MediaScanner_native_finalize}, |
| 310 | }; |
| 311 | |
| 312 | static const char* const kClassPathName = "android/media/MediaScanner"; |
| 313 | |
Marco Nelissen | 4935d05 | 2009-08-03 11:12:58 -0700 | [diff] [blame] | 314 | // This function only registers the native methods, and is called from |
| 315 | // JNI_OnLoad in android_media_MediaPlayer.cpp |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 316 | int register_android_media_MediaScanner(JNIEnv *env) |
| 317 | { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 318 | return AndroidRuntime::registerNativeMethods(env, |
| 319 | "android/media/MediaScanner", gMethods, NELEM(gMethods)); |
| 320 | } |
| 321 | |
| 322 | |