/* * Copyright (C) 2010 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #define LOG_TAG "MtpDatabaseJNI" #include "utils/Log.h" #include "utils/String8.h" #include "android_media_Streams.h" #include "mtp.h" #include "IMtpDatabase.h" #include "MtpDataPacket.h" #include "MtpObjectInfo.h" #include "MtpProperty.h" #include "MtpStringBuffer.h" #include "MtpUtils.h" #include "src/piex_types.h" #include "src/piex.h" #include #include #include "core_jni_helpers.h" #include #include #include #include #include #include #include #include #include #include using namespace android; // ---------------------------------------------------------------------------- // MtpDatabase methods static jmethodID method_beginSendObject; static jmethodID method_endSendObject; static jmethodID method_rescanFile; static jmethodID method_getObjectList; static jmethodID method_getNumObjects; static jmethodID method_getSupportedPlaybackFormats; static jmethodID method_getSupportedCaptureFormats; static jmethodID method_getSupportedObjectProperties; static jmethodID method_getSupportedDeviceProperties; static jmethodID method_setObjectProperty; static jmethodID method_getDeviceProperty; static jmethodID method_setDeviceProperty; static jmethodID method_getObjectPropertyList; static jmethodID method_getObjectInfo; static jmethodID method_getObjectFilePath; static jmethodID method_openFilePath; static jmethodID method_getThumbnailInfo; static jmethodID method_getThumbnailData; static jmethodID method_beginDeleteObject; static jmethodID method_endDeleteObject; static jmethodID method_beginMoveObject; static jmethodID method_endMoveObject; static jmethodID method_beginCopyObject; static jmethodID method_endCopyObject; static jmethodID method_getObjectReferences; static jmethodID method_setObjectReferences; // MtpDatabase fields. static jfieldID field_context; // MtpPropertyList methods static jmethodID method_getCode; static jmethodID method_getCount; static jmethodID method_getObjectHandles; static jmethodID method_getPropertyCodes; static jmethodID method_getDataTypes; static jmethodID method_getLongValues; static jmethodID method_getStringValues; // Initializer for the jfieldIDs and jmethodIDs above. This method must be invoked // before using these static fields and methods for JNI accesses. static void initializeJavaIDs(JNIEnv* env) { static std::once_flag sJniInitialized; #define GET_METHOD_ID(name, jclass, signature) \ method_##name = GetMethodIDOrDie(env, jclass, #name, signature); std::call_once(sJniInitialized, [](JNIEnv* env) { const jclass mdb_class = FindClassOrDie(env, "android/mtp/MtpDatabase"); GET_METHOD_ID(beginSendObject, mdb_class, "(Ljava/lang/String;III)I"); GET_METHOD_ID(endSendObject, mdb_class, "(IZ)V"); GET_METHOD_ID(rescanFile, mdb_class, "(Ljava/lang/String;II)V"); GET_METHOD_ID(getObjectList, mdb_class, "(III)[I"); GET_METHOD_ID(getNumObjects, mdb_class, "(III)I"); GET_METHOD_ID(getSupportedPlaybackFormats, mdb_class, "()[I"); GET_METHOD_ID(getSupportedCaptureFormats, mdb_class, "()[I"); GET_METHOD_ID(getSupportedObjectProperties, mdb_class, "(I)[I"); GET_METHOD_ID(getSupportedDeviceProperties, mdb_class, "()[I"); GET_METHOD_ID(setObjectProperty, mdb_class, "(IIJLjava/lang/String;)I"); GET_METHOD_ID(getDeviceProperty, mdb_class, "(I[J[C)I"); GET_METHOD_ID(setDeviceProperty, mdb_class, "(IJLjava/lang/String;)I"); GET_METHOD_ID(getObjectPropertyList, mdb_class, "(IIIII)Landroid/mtp/MtpPropertyList;"); GET_METHOD_ID(getObjectInfo, mdb_class, "(I[I[C[J)Z"); GET_METHOD_ID(getObjectFilePath, mdb_class, "(I[C[J)I"); GET_METHOD_ID(openFilePath, mdb_class, "(Ljava/lang/String;Z)I"); GET_METHOD_ID(getThumbnailInfo, mdb_class, "(I[J)Z"); GET_METHOD_ID(getThumbnailData, mdb_class, "(I)[B"); GET_METHOD_ID(beginDeleteObject, mdb_class, "(I)I"); GET_METHOD_ID(endDeleteObject, mdb_class, "(IZ)V"); GET_METHOD_ID(beginMoveObject, mdb_class, "(III)I"); GET_METHOD_ID(endMoveObject, mdb_class, "(IIIIIZ)V"); GET_METHOD_ID(beginCopyObject, mdb_class, "(III)I"); GET_METHOD_ID(endCopyObject, mdb_class, "(IZ)V"); GET_METHOD_ID(getObjectReferences, mdb_class, "(I)[I"); GET_METHOD_ID(setObjectReferences, mdb_class, "(I[I)I"); field_context = GetFieldIDOrDie(env, mdb_class, "mNativeContext", "J"); const jclass mpl_class = FindClassOrDie(env, "android/mtp/MtpPropertyList"); GET_METHOD_ID(getCode, mpl_class, "()I"); GET_METHOD_ID(getCount, mpl_class, "()I"); GET_METHOD_ID(getObjectHandles, mpl_class, "()[I"); GET_METHOD_ID(getPropertyCodes, mpl_class, "()[I"); GET_METHOD_ID(getDataTypes, mpl_class, "()[I"); GET_METHOD_ID(getLongValues, mpl_class, "()[J"); GET_METHOD_ID(getStringValues, mpl_class, "()[Ljava/lang/String;"); return 0; }, env); #undef GET_METHOD_ID } IMtpDatabase* getMtpDatabase(JNIEnv *env, jobject database) { return (IMtpDatabase *)env->GetLongField(database, field_context); } // ---------------------------------------------------------------------------- class MtpDatabase : public IMtpDatabase { private: jobject mDatabase; jintArray mIntBuffer; jlongArray mLongBuffer; jcharArray mStringBuffer; public: MtpDatabase(JNIEnv *env, jobject client); virtual ~MtpDatabase(); void cleanup(JNIEnv *env); virtual MtpObjectHandle beginSendObject(const char* path, MtpObjectFormat format, MtpObjectHandle parent, MtpStorageID storage); virtual void endSendObject(MtpObjectHandle handle, bool succeeded); virtual void rescanFile(const char* path, MtpObjectHandle handle, MtpObjectFormat format); virtual MtpObjectHandleList* getObjectList(MtpStorageID storageID, MtpObjectFormat format, MtpObjectHandle parent); virtual int getNumObjects(MtpStorageID storageID, MtpObjectFormat format, MtpObjectHandle parent); // callee should delete[] the results from these // results can be NULL virtual MtpObjectFormatList* getSupportedPlaybackFormats(); virtual MtpObjectFormatList* getSupportedCaptureFormats(); virtual MtpObjectPropertyList* getSupportedObjectProperties(MtpObjectFormat format); virtual MtpDevicePropertyList* getSupportedDeviceProperties(); virtual MtpResponseCode getObjectPropertyValue(MtpObjectHandle handle, MtpObjectProperty property, MtpDataPacket& packet); virtual MtpResponseCode setObjectPropertyValue(MtpObjectHandle handle, MtpObjectProperty property, MtpDataPacket& packet); virtual MtpResponseCode getDevicePropertyValue(MtpDeviceProperty property, MtpDataPacket& packet); virtual MtpResponseCode setDevicePropertyValue(MtpDeviceProperty property, MtpDataPacket& packet); virtual MtpResponseCode resetDeviceProperty(MtpDeviceProperty property); virtual MtpResponseCode getObjectPropertyList(MtpObjectHandle handle, uint32_t format, uint32_t property, int groupCode, int depth, MtpDataPacket& packet); virtual MtpResponseCode getObjectInfo(MtpObjectHandle handle, MtpObjectInfo& info); virtual void* getThumbnail(MtpObjectHandle handle, size_t& outThumbSize); virtual MtpResponseCode getObjectFilePath(MtpObjectHandle handle, MtpStringBuffer& outFilePath, int64_t& outFileLength, MtpObjectFormat& outFormat); virtual int openFilePath(const char* path, bool transcode); virtual MtpResponseCode beginDeleteObject(MtpObjectHandle handle); virtual void endDeleteObject(MtpObjectHandle handle, bool succeeded); bool getObjectPropertyInfo(MtpObjectProperty property, int& type); bool getDevicePropertyInfo(MtpDeviceProperty property, int& type); virtual MtpObjectHandleList* getObjectReferences(MtpObjectHandle handle); virtual MtpResponseCode setObjectReferences(MtpObjectHandle handle, MtpObjectHandleList* references); virtual MtpProperty* getObjectPropertyDesc(MtpObjectProperty property, MtpObjectFormat format); virtual MtpProperty* getDevicePropertyDesc(MtpDeviceProperty property); virtual MtpResponseCode beginMoveObject(MtpObjectHandle handle, MtpObjectHandle newParent, MtpStorageID newStorage); virtual void endMoveObject(MtpObjectHandle oldParent, MtpObjectHandle newParent, MtpStorageID oldStorage, MtpStorageID newStorage, MtpObjectHandle handle, bool succeeded); virtual MtpResponseCode beginCopyObject(MtpObjectHandle handle, MtpObjectHandle newParent, MtpStorageID newStorage); virtual void endCopyObject(MtpObjectHandle handle, bool succeeded); }; // ---------------------------------------------------------------------------- static void checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) { if (env->ExceptionCheck()) { ALOGE("An exception was thrown by callback '%s'.", methodName); LOGE_EX(env); env->ExceptionClear(); } } // ---------------------------------------------------------------------------- MtpDatabase::MtpDatabase(JNIEnv *env, jobject client) : mDatabase(env->NewGlobalRef(client)), mIntBuffer(NULL), mLongBuffer(NULL), mStringBuffer(NULL) { // create buffers for out arguments // we don't need to be thread-safe so this is OK jintArray intArray = env->NewIntArray(3); if (!intArray) { return; // Already threw. } mIntBuffer = (jintArray)env->NewGlobalRef(intArray); jlongArray longArray = env->NewLongArray(3); if (!longArray) { return; // Already threw. } mLongBuffer = (jlongArray)env->NewGlobalRef(longArray); // Needs to be long enough to hold a file path for getObjectFilePath() jcharArray charArray = env->NewCharArray(PATH_MAX + 1); if (!charArray) { return; // Already threw. } mStringBuffer = (jcharArray)env->NewGlobalRef(charArray); } void MtpDatabase::cleanup(JNIEnv *env) { env->DeleteGlobalRef(mDatabase); env->DeleteGlobalRef(mIntBuffer); env->DeleteGlobalRef(mLongBuffer); env->DeleteGlobalRef(mStringBuffer); } MtpDatabase::~MtpDatabase() { } MtpObjectHandle MtpDatabase::beginSendObject(const char* path, MtpObjectFormat format, MtpObjectHandle parent, MtpStorageID storage) { JNIEnv* env = AndroidRuntime::getJNIEnv(); jstring pathStr = env->NewStringUTF(path); MtpObjectHandle result = env->CallIntMethod(mDatabase, method_beginSendObject, pathStr, (jint)format, (jint)parent, (jint)storage); if (pathStr) env->DeleteLocalRef(pathStr); checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } void MtpDatabase::endSendObject(MtpObjectHandle handle, bool succeeded) { JNIEnv* env = AndroidRuntime::getJNIEnv(); env->CallVoidMethod(mDatabase, method_endSendObject, (jint)handle, (jboolean)succeeded); checkAndClearExceptionFromCallback(env, __FUNCTION__); } void MtpDatabase::rescanFile(const char* path, MtpObjectHandle handle, MtpObjectFormat format) { JNIEnv* env = AndroidRuntime::getJNIEnv(); jstring pathStr = env->NewStringUTF(path); env->CallVoidMethod(mDatabase, method_rescanFile, pathStr, (jint)handle, (jint)format); if (pathStr) env->DeleteLocalRef(pathStr); checkAndClearExceptionFromCallback(env, __FUNCTION__); } MtpObjectHandleList* MtpDatabase::getObjectList(MtpStorageID storageID, MtpObjectFormat format, MtpObjectHandle parent) { JNIEnv* env = AndroidRuntime::getJNIEnv(); jintArray array = (jintArray)env->CallObjectMethod(mDatabase, method_getObjectList, (jint)storageID, (jint)format, (jint)parent); if (!array) return NULL; MtpObjectHandleList* list = new MtpObjectHandleList(); jint* handles = env->GetIntArrayElements(array, 0); jsize length = env->GetArrayLength(array); for (int i = 0; i < length; i++) list->push_back(handles[i]); env->ReleaseIntArrayElements(array, handles, 0); env->DeleteLocalRef(array); checkAndClearExceptionFromCallback(env, __FUNCTION__); return list; } int MtpDatabase::getNumObjects(MtpStorageID storageID, MtpObjectFormat format, MtpObjectHandle parent) { JNIEnv* env = AndroidRuntime::getJNIEnv(); int result = env->CallIntMethod(mDatabase, method_getNumObjects, (jint)storageID, (jint)format, (jint)parent); checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } MtpObjectFormatList* MtpDatabase::getSupportedPlaybackFormats() { JNIEnv* env = AndroidRuntime::getJNIEnv(); jintArray array = (jintArray)env->CallObjectMethod(mDatabase, method_getSupportedPlaybackFormats); if (!array) return NULL; MtpObjectFormatList* list = new MtpObjectFormatList(); jint* formats = env->GetIntArrayElements(array, 0); jsize length = env->GetArrayLength(array); for (int i = 0; i < length; i++) list->push_back(formats[i]); env->ReleaseIntArrayElements(array, formats, 0); env->DeleteLocalRef(array); checkAndClearExceptionFromCallback(env, __FUNCTION__); return list; } MtpObjectFormatList* MtpDatabase::getSupportedCaptureFormats() { JNIEnv* env = AndroidRuntime::getJNIEnv(); jintArray array = (jintArray)env->CallObjectMethod(mDatabase, method_getSupportedCaptureFormats); if (!array) return NULL; MtpObjectFormatList* list = new MtpObjectFormatList(); jint* formats = env->GetIntArrayElements(array, 0); jsize length = env->GetArrayLength(array); for (int i = 0; i < length; i++) list->push_back(formats[i]); env->ReleaseIntArrayElements(array, formats, 0); env->DeleteLocalRef(array); checkAndClearExceptionFromCallback(env, __FUNCTION__); return list; } MtpObjectPropertyList* MtpDatabase::getSupportedObjectProperties(MtpObjectFormat format) { JNIEnv* env = AndroidRuntime::getJNIEnv(); jintArray array = (jintArray)env->CallObjectMethod(mDatabase, method_getSupportedObjectProperties, (jint)format); if (!array) return NULL; MtpObjectPropertyList* list = new MtpObjectPropertyList(); jint* properties = env->GetIntArrayElements(array, 0); jsize length = env->GetArrayLength(array); for (int i = 0; i < length; i++) list->push_back(properties[i]); env->ReleaseIntArrayElements(array, properties, 0); env->DeleteLocalRef(array); checkAndClearExceptionFromCallback(env, __FUNCTION__); return list; } MtpDevicePropertyList* MtpDatabase::getSupportedDeviceProperties() { JNIEnv* env = AndroidRuntime::getJNIEnv(); jintArray array = (jintArray)env->CallObjectMethod(mDatabase, method_getSupportedDeviceProperties); if (!array) return NULL; MtpDevicePropertyList* list = new MtpDevicePropertyList(); jint* properties = env->GetIntArrayElements(array, 0); jsize length = env->GetArrayLength(array); for (int i = 0; i < length; i++) list->push_back(properties[i]); env->ReleaseIntArrayElements(array, properties, 0); env->DeleteLocalRef(array); checkAndClearExceptionFromCallback(env, __FUNCTION__); return list; } MtpResponseCode MtpDatabase::getObjectPropertyValue(MtpObjectHandle handle, MtpObjectProperty property, MtpDataPacket& packet) { static_assert(sizeof(jint) >= sizeof(MtpObjectHandle), "Casting MtpObjectHandle to jint loses a value"); static_assert(sizeof(jint) >= sizeof(MtpObjectProperty), "Casting MtpObjectProperty to jint loses a value"); JNIEnv* env = AndroidRuntime::getJNIEnv(); jobject list = env->CallObjectMethod( mDatabase, method_getObjectPropertyList, static_cast(handle), 0, static_cast(property), 0, 0); MtpResponseCode result = env->CallIntMethod(list, method_getCode); jint count = env->CallIntMethod(list, method_getCount); if (count != 1) result = MTP_RESPONSE_GENERAL_ERROR; if (result == MTP_RESPONSE_OK) { jintArray objectHandlesArray = (jintArray)env->CallObjectMethod(list, method_getObjectHandles); jintArray propertyCodesArray = (jintArray)env->CallObjectMethod(list, method_getPropertyCodes); jintArray dataTypesArray = (jintArray)env->CallObjectMethod(list, method_getDataTypes); jlongArray longValuesArray = (jlongArray)env->CallObjectMethod(list, method_getLongValues); jobjectArray stringValuesArray = (jobjectArray)env->CallObjectMethod(list, method_getStringValues); jint* objectHandles = env->GetIntArrayElements(objectHandlesArray, 0); jint* propertyCodes = env->GetIntArrayElements(propertyCodesArray, 0); jint* dataTypes = env->GetIntArrayElements(dataTypesArray, 0); jlong* longValues = env->GetLongArrayElements(longValuesArray, 0); int type = dataTypes[0]; jlong longValue = (longValues ? longValues[0] : 0); switch (type) { case MTP_TYPE_INT8: packet.putInt8(longValue); break; case MTP_TYPE_UINT8: packet.putUInt8(longValue); break; case MTP_TYPE_INT16: packet.putInt16(longValue); break; case MTP_TYPE_UINT16: packet.putUInt16(longValue); break; case MTP_TYPE_INT32: packet.putInt32(longValue); break; case MTP_TYPE_UINT32: packet.putUInt32(longValue); break; case MTP_TYPE_INT64: packet.putInt64(longValue); break; case MTP_TYPE_UINT64: packet.putUInt64(longValue); break; case MTP_TYPE_INT128: packet.putInt128(longValue); break; case MTP_TYPE_UINT128: packet.putUInt128(longValue); break; case MTP_TYPE_STR: { jstring stringValue = (jstring)env->GetObjectArrayElement(stringValuesArray, 0); const char* str = (stringValue ? env->GetStringUTFChars(stringValue, NULL) : NULL); if (stringValue) { packet.putString(str); env->ReleaseStringUTFChars(stringValue, str); } else { packet.putEmptyString(); } env->DeleteLocalRef(stringValue); break; } default: ALOGE("unsupported type in getObjectPropertyValue\n"); result = MTP_RESPONSE_INVALID_OBJECT_PROP_FORMAT; } env->ReleaseIntArrayElements(objectHandlesArray, objectHandles, 0); env->ReleaseIntArrayElements(propertyCodesArray, propertyCodes, 0); env->ReleaseIntArrayElements(dataTypesArray, dataTypes, 0); env->ReleaseLongArrayElements(longValuesArray, longValues, 0); env->DeleteLocalRef(objectHandlesArray); env->DeleteLocalRef(propertyCodesArray); env->DeleteLocalRef(dataTypesArray); env->DeleteLocalRef(longValuesArray); env->DeleteLocalRef(stringValuesArray); } env->DeleteLocalRef(list); checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } static bool readLongValue(int type, MtpDataPacket& packet, jlong& longValue) { switch (type) { case MTP_TYPE_INT8: { int8_t temp; if (!packet.getInt8(temp)) return false; longValue = temp; break; } case MTP_TYPE_UINT8: { uint8_t temp; if (!packet.getUInt8(temp)) return false; longValue = temp; break; } case MTP_TYPE_INT16: { int16_t temp; if (!packet.getInt16(temp)) return false; longValue = temp; break; } case MTP_TYPE_UINT16: { uint16_t temp; if (!packet.getUInt16(temp)) return false; longValue = temp; break; } case MTP_TYPE_INT32: { int32_t temp; if (!packet.getInt32(temp)) return false; longValue = temp; break; } case MTP_TYPE_UINT32: { uint32_t temp; if (!packet.getUInt32(temp)) return false; longValue = temp; break; } case MTP_TYPE_INT64: { int64_t temp; if (!packet.getInt64(temp)) return false; longValue = temp; break; } case MTP_TYPE_UINT64: { uint64_t temp; if (!packet.getUInt64(temp)) return false; longValue = temp; break; } default: ALOGE("unsupported type in readLongValue"); return false; } return true; } MtpResponseCode MtpDatabase::setObjectPropertyValue(MtpObjectHandle handle, MtpObjectProperty property, MtpDataPacket& packet) { int type; if (!getObjectPropertyInfo(property, type)) return MTP_RESPONSE_OBJECT_PROP_NOT_SUPPORTED; JNIEnv* env = AndroidRuntime::getJNIEnv(); jlong longValue = 0; jstring stringValue = NULL; MtpResponseCode result = MTP_RESPONSE_INVALID_OBJECT_PROP_FORMAT; if (type == MTP_TYPE_STR) { MtpStringBuffer buffer; if (!packet.getString(buffer)) goto fail; stringValue = env->NewStringUTF((const char *)buffer); } else { if (!readLongValue(type, packet, longValue)) goto fail; } result = env->CallIntMethod(mDatabase, method_setObjectProperty, (jint)handle, (jint)property, longValue, stringValue); if (stringValue) env->DeleteLocalRef(stringValue); fail: checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } MtpResponseCode MtpDatabase::getDevicePropertyValue(MtpDeviceProperty property, MtpDataPacket& packet) { JNIEnv* env = AndroidRuntime::getJNIEnv(); int type; if (!getDevicePropertyInfo(property, type)) return MTP_RESPONSE_DEVICE_PROP_NOT_SUPPORTED; jint result = env->CallIntMethod(mDatabase, method_getDeviceProperty, (jint)property, mLongBuffer, mStringBuffer); if (result != MTP_RESPONSE_OK) { checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } jlong* longValues = env->GetLongArrayElements(mLongBuffer, 0); jlong longValue = longValues[0]; env->ReleaseLongArrayElements(mLongBuffer, longValues, 0); switch (type) { case MTP_TYPE_INT8: packet.putInt8(longValue); break; case MTP_TYPE_UINT8: packet.putUInt8(longValue); break; case MTP_TYPE_INT16: packet.putInt16(longValue); break; case MTP_TYPE_UINT16: packet.putUInt16(longValue); break; case MTP_TYPE_INT32: packet.putInt32(longValue); break; case MTP_TYPE_UINT32: packet.putUInt32(longValue); break; case MTP_TYPE_INT64: packet.putInt64(longValue); break; case MTP_TYPE_UINT64: packet.putUInt64(longValue); break; case MTP_TYPE_INT128: packet.putInt128(longValue); break; case MTP_TYPE_UINT128: packet.putInt128(longValue); break; case MTP_TYPE_STR: { jchar* str = env->GetCharArrayElements(mStringBuffer, 0); packet.putString(str); env->ReleaseCharArrayElements(mStringBuffer, str, 0); break; } default: ALOGE("unsupported type in getDevicePropertyValue\n"); return MTP_RESPONSE_INVALID_DEVICE_PROP_FORMAT; } checkAndClearExceptionFromCallback(env, __FUNCTION__); return MTP_RESPONSE_OK; } MtpResponseCode MtpDatabase::setDevicePropertyValue(MtpDeviceProperty property, MtpDataPacket& packet) { int type; if (!getDevicePropertyInfo(property, type)) return MTP_RESPONSE_DEVICE_PROP_NOT_SUPPORTED; JNIEnv* env = AndroidRuntime::getJNIEnv(); jlong longValue = 0; jstring stringValue = NULL; MtpResponseCode result = MTP_RESPONSE_INVALID_DEVICE_PROP_FORMAT; if (type == MTP_TYPE_STR) { MtpStringBuffer buffer; if (!packet.getString(buffer)) goto fail; stringValue = env->NewStringUTF((const char *)buffer); } else { if (!readLongValue(type, packet, longValue)) goto fail; } result = env->CallIntMethod(mDatabase, method_setDeviceProperty, (jint)property, longValue, stringValue); if (stringValue) env->DeleteLocalRef(stringValue); fail: checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } MtpResponseCode MtpDatabase::resetDeviceProperty(MtpDeviceProperty /*property*/) { return -1; } MtpResponseCode MtpDatabase::getObjectPropertyList(MtpObjectHandle handle, uint32_t format, uint32_t property, int groupCode, int depth, MtpDataPacket& packet) { static_assert(sizeof(jint) >= sizeof(MtpObjectHandle), "Casting MtpObjectHandle to jint loses a value"); JNIEnv* env = AndroidRuntime::getJNIEnv(); jobject list = env->CallObjectMethod( mDatabase, method_getObjectPropertyList, static_cast(handle), static_cast(format), static_cast(property), static_cast(groupCode), static_cast(depth)); checkAndClearExceptionFromCallback(env, __FUNCTION__); if (!list) return MTP_RESPONSE_GENERAL_ERROR; int count = env->CallIntMethod(list, method_getCount); MtpResponseCode result = env->CallIntMethod(list, method_getCode); packet.putUInt32(count); if (count > 0) { jintArray objectHandlesArray = (jintArray)env->CallObjectMethod(list, method_getObjectHandles); jintArray propertyCodesArray = (jintArray)env->CallObjectMethod(list, method_getPropertyCodes); jintArray dataTypesArray = (jintArray)env->CallObjectMethod(list, method_getDataTypes); jlongArray longValuesArray = (jlongArray)env->CallObjectMethod(list, method_getLongValues); jobjectArray stringValuesArray = (jobjectArray)env->CallObjectMethod(list, method_getStringValues); jint* objectHandles = env->GetIntArrayElements(objectHandlesArray, 0); jint* propertyCodes = env->GetIntArrayElements(propertyCodesArray, 0); jint* dataTypes = env->GetIntArrayElements(dataTypesArray, 0); jlong* longValues = (longValuesArray ? env->GetLongArrayElements(longValuesArray, 0) : NULL); for (int i = 0; i < count; i++) { packet.putUInt32(objectHandles[i]); packet.putUInt16(propertyCodes[i]); int type = dataTypes[i]; packet.putUInt16(type); if (type == MTP_TYPE_STR) { jstring value = (jstring)env->GetObjectArrayElement(stringValuesArray, i); const char *valueStr = (value ? env->GetStringUTFChars(value, NULL) : NULL); if (valueStr) { packet.putString(valueStr); env->ReleaseStringUTFChars(value, valueStr); } else { packet.putEmptyString(); } env->DeleteLocalRef(value); continue; } if (!longValues) { ALOGE("bad longValuesArray value in MyMtpDatabase::getObjectPropertyList"); continue; } switch (type) { case MTP_TYPE_INT8: packet.putInt8(longValues[i]); break; case MTP_TYPE_UINT8: packet.putUInt8(longValues[i]); break; case MTP_TYPE_INT16: packet.putInt16(longValues[i]); break; case MTP_TYPE_UINT16: packet.putUInt16(longValues[i]); break; case MTP_TYPE_INT32: packet.putInt32(longValues[i]); break; case MTP_TYPE_UINT32: packet.putUInt32(longValues[i]); break; case MTP_TYPE_INT64: packet.putInt64(longValues[i]); break; case MTP_TYPE_UINT64: packet.putUInt64(longValues[i]); break; case MTP_TYPE_INT128: packet.putInt128(longValues[i]); break; case MTP_TYPE_UINT128: packet.putUInt128(longValues[i]); break; default: ALOGE("bad or unsupported data type in MtpDatabase::getObjectPropertyList"); break; } } env->ReleaseIntArrayElements(objectHandlesArray, objectHandles, 0); env->ReleaseIntArrayElements(propertyCodesArray, propertyCodes, 0); env->ReleaseIntArrayElements(dataTypesArray, dataTypes, 0); env->ReleaseLongArrayElements(longValuesArray, longValues, 0); env->DeleteLocalRef(objectHandlesArray); env->DeleteLocalRef(propertyCodesArray); env->DeleteLocalRef(dataTypesArray); env->DeleteLocalRef(longValuesArray); env->DeleteLocalRef(stringValuesArray); } env->DeleteLocalRef(list); checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } MtpResponseCode MtpDatabase::getObjectInfo(MtpObjectHandle handle, MtpObjectInfo& info) { MtpStringBuffer path; int64_t length; MtpObjectFormat format; MtpResponseCode result = getObjectFilePath(handle, path, length, format); if (result != MTP_RESPONSE_OK) { return result; } info.mCompressedSize = (length > 0xFFFFFFFFLL ? 0xFFFFFFFF : (uint32_t)length); JNIEnv* env = AndroidRuntime::getJNIEnv(); if (!env->CallBooleanMethod(mDatabase, method_getObjectInfo, (jint)handle, mIntBuffer, mStringBuffer, mLongBuffer)) { return MTP_RESPONSE_INVALID_OBJECT_HANDLE; } jint* intValues = env->GetIntArrayElements(mIntBuffer, 0); info.mStorageID = intValues[0]; info.mFormat = intValues[1]; info.mParent = intValues[2]; env->ReleaseIntArrayElements(mIntBuffer, intValues, 0); jlong* longValues = env->GetLongArrayElements(mLongBuffer, 0); info.mDateCreated = longValues[0]; info.mDateModified = longValues[1]; env->ReleaseLongArrayElements(mLongBuffer, longValues, 0); if ((false)) { info.mAssociationType = (format == MTP_FORMAT_ASSOCIATION ? MTP_ASSOCIATION_TYPE_GENERIC_FOLDER : MTP_ASSOCIATION_TYPE_UNDEFINED); } info.mAssociationType = MTP_ASSOCIATION_TYPE_UNDEFINED; jchar* str = env->GetCharArrayElements(mStringBuffer, 0); MtpStringBuffer temp(str); info.mName = strdup(temp); env->ReleaseCharArrayElements(mStringBuffer, str, 0); // read EXIF data for thumbnail information switch (info.mFormat) { case MTP_FORMAT_EXIF_JPEG: case MTP_FORMAT_HEIF: case MTP_FORMAT_JFIF: case MTP_FORMAT_PNG: case MTP_FORMAT_BMP: case MTP_FORMAT_GIF: { env = AndroidRuntime::getJNIEnv(); if (env->CallBooleanMethod( mDatabase, method_getThumbnailInfo, (jint)handle, mLongBuffer)) { jlong* longValues = env->GetLongArrayElements(mLongBuffer, 0); jlong size = longValues[0]; jlong w = longValues[1]; jlong h = longValues[2]; if (size > 0 && size <= UINT32_MAX && w > 0 && w <= UINT32_MAX && h > 0 && h <= UINT32_MAX) { info.mThumbCompressedSize = size; info.mThumbFormat = MTP_FORMAT_EXIF_JPEG; info.mImagePixWidth = w; info.mImagePixHeight = h; } env->ReleaseLongArrayElements(mLongBuffer, longValues, 0); } break; } // Except DNG, all supported RAW image formats are not defined in PTP 1.2 specification. // Most of RAW image formats are based on TIFF or TIFF/EP. To render Fuji's RAF format, // it checks MTP_FORMAT_DEFINED case since it's designed as a custom format. case MTP_FORMAT_DNG: case MTP_FORMAT_TIFF: case MTP_FORMAT_TIFF_EP: case MTP_FORMAT_DEFINED: { String8 temp(path); std::unique_ptr stream(new FileStream(temp)); piex::PreviewImageData image_data; if (!GetExifFromRawImage(stream.get(), temp, image_data)) { // Couldn't parse EXIF data from a image file via piex. break; } info.mThumbCompressedSize = image_data.thumbnail.length; info.mThumbFormat = MTP_FORMAT_EXIF_JPEG; info.mImagePixWidth = image_data.full_width; info.mImagePixHeight = image_data.full_height; break; } } checkAndClearExceptionFromCallback(env, __FUNCTION__); return MTP_RESPONSE_OK; } void* MtpDatabase::getThumbnail(MtpObjectHandle handle, size_t& outThumbSize) { MtpStringBuffer path; int64_t length; MtpObjectFormat format; void* result = NULL; outThumbSize = 0; if (getObjectFilePath(handle, path, length, format) == MTP_RESPONSE_OK) { switch (format) { case MTP_FORMAT_EXIF_JPEG: case MTP_FORMAT_HEIF: case MTP_FORMAT_JFIF: case MTP_FORMAT_PNG: case MTP_FORMAT_BMP: case MTP_FORMAT_GIF: { JNIEnv* env = AndroidRuntime::getJNIEnv(); jbyteArray thumbData = (jbyteArray) env->CallObjectMethod( mDatabase, method_getThumbnailData, (jint)handle); if (thumbData == NULL) { return nullptr; } jsize thumbSize = env->GetArrayLength(thumbData); result = malloc(thumbSize); if (result) { env->GetByteArrayRegion(thumbData, 0, thumbSize, (jbyte*)result); outThumbSize = thumbSize; } env->DeleteLocalRef(thumbData); break; } // See the above comment on getObjectInfo() method. case MTP_FORMAT_DNG: case MTP_FORMAT_TIFF: case MTP_FORMAT_TIFF_EP: case MTP_FORMAT_DEFINED: { String8 temp(path); std::unique_ptr stream(new FileStream(temp)); piex::PreviewImageData image_data; if (!GetExifFromRawImage(stream.get(), temp, image_data)) { // Couldn't parse EXIF data from a image file via piex. break; } if (image_data.thumbnail.length == 0 || image_data.thumbnail.format != ::piex::Image::kJpegCompressed) { // No thumbnail or non jpeg thumbnail. break; } result = malloc(image_data.thumbnail.length); if (result) { piex::Error err = stream.get()->GetData( image_data.thumbnail.offset, image_data.thumbnail.length, (std::uint8_t *)result); if (err == piex::Error::kOk) { outThumbSize = image_data.thumbnail.length; } else { free(result); result = NULL; } } break; } } } return result; } MtpResponseCode MtpDatabase::getObjectFilePath(MtpObjectHandle handle, MtpStringBuffer& outFilePath, int64_t& outFileLength, MtpObjectFormat& outFormat) { JNIEnv* env = AndroidRuntime::getJNIEnv(); jint result = env->CallIntMethod(mDatabase, method_getObjectFilePath, (jint)handle, mStringBuffer, mLongBuffer); if (result != MTP_RESPONSE_OK) { checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } jchar* str = env->GetCharArrayElements(mStringBuffer, 0); outFilePath.set(str); env->ReleaseCharArrayElements(mStringBuffer, str, 0); jlong* longValues = env->GetLongArrayElements(mLongBuffer, 0); outFileLength = longValues[0]; outFormat = longValues[1]; env->ReleaseLongArrayElements(mLongBuffer, longValues, 0); checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } int MtpDatabase::openFilePath(const char* path, bool transcode) { JNIEnv* env = AndroidRuntime::getJNIEnv(); jstring pathStr = env->NewStringUTF(path); jint result = env->CallIntMethod(mDatabase, method_openFilePath, pathStr, transcode); if (result < 0) { checkAndClearExceptionFromCallback(env, __FUNCTION__); } return result; } MtpResponseCode MtpDatabase::beginDeleteObject(MtpObjectHandle handle) { JNIEnv* env = AndroidRuntime::getJNIEnv(); MtpResponseCode result = env->CallIntMethod(mDatabase, method_beginDeleteObject, (jint)handle); checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } void MtpDatabase::endDeleteObject(MtpObjectHandle handle, bool succeeded) { JNIEnv* env = AndroidRuntime::getJNIEnv(); env->CallVoidMethod(mDatabase, method_endDeleteObject, (jint)handle, (jboolean) succeeded); checkAndClearExceptionFromCallback(env, __FUNCTION__); } MtpResponseCode MtpDatabase::beginMoveObject(MtpObjectHandle handle, MtpObjectHandle newParent, MtpStorageID newStorage) { JNIEnv* env = AndroidRuntime::getJNIEnv(); MtpResponseCode result = env->CallIntMethod(mDatabase, method_beginMoveObject, (jint)handle, (jint)newParent, (jint) newStorage); checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } void MtpDatabase::endMoveObject(MtpObjectHandle oldParent, MtpObjectHandle newParent, MtpStorageID oldStorage, MtpStorageID newStorage, MtpObjectHandle handle, bool succeeded) { JNIEnv* env = AndroidRuntime::getJNIEnv(); env->CallVoidMethod(mDatabase, method_endMoveObject, (jint)oldParent, (jint) newParent, (jint) oldStorage, (jint) newStorage, (jint) handle, (jboolean) succeeded); checkAndClearExceptionFromCallback(env, __FUNCTION__); } MtpResponseCode MtpDatabase::beginCopyObject(MtpObjectHandle handle, MtpObjectHandle newParent, MtpStorageID newStorage) { JNIEnv* env = AndroidRuntime::getJNIEnv(); MtpResponseCode result = env->CallIntMethod(mDatabase, method_beginCopyObject, (jint)handle, (jint)newParent, (jint) newStorage); checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } void MtpDatabase::endCopyObject(MtpObjectHandle handle, bool succeeded) { JNIEnv* env = AndroidRuntime::getJNIEnv(); env->CallVoidMethod(mDatabase, method_endCopyObject, (jint)handle, (jboolean)succeeded); checkAndClearExceptionFromCallback(env, __FUNCTION__); } struct PropertyTableEntry { MtpObjectProperty property; int type; }; static const PropertyTableEntry kObjectPropertyTable[] = { { MTP_PROPERTY_STORAGE_ID, MTP_TYPE_UINT32 }, { MTP_PROPERTY_OBJECT_FORMAT, MTP_TYPE_UINT16 }, { MTP_PROPERTY_PROTECTION_STATUS, MTP_TYPE_UINT16 }, { MTP_PROPERTY_OBJECT_SIZE, MTP_TYPE_UINT64 }, { MTP_PROPERTY_OBJECT_FILE_NAME, MTP_TYPE_STR }, { MTP_PROPERTY_DATE_MODIFIED, MTP_TYPE_STR }, { MTP_PROPERTY_PARENT_OBJECT, MTP_TYPE_UINT32 }, { MTP_PROPERTY_PERSISTENT_UID, MTP_TYPE_UINT128 }, { MTP_PROPERTY_NAME, MTP_TYPE_STR }, { MTP_PROPERTY_DISPLAY_NAME, MTP_TYPE_STR }, { MTP_PROPERTY_DATE_ADDED, MTP_TYPE_STR }, { MTP_PROPERTY_ARTIST, MTP_TYPE_STR }, { MTP_PROPERTY_ALBUM_NAME, MTP_TYPE_STR }, { MTP_PROPERTY_ALBUM_ARTIST, MTP_TYPE_STR }, { MTP_PROPERTY_TRACK, MTP_TYPE_UINT16 }, { MTP_PROPERTY_ORIGINAL_RELEASE_DATE, MTP_TYPE_STR }, { MTP_PROPERTY_GENRE, MTP_TYPE_STR }, { MTP_PROPERTY_COMPOSER, MTP_TYPE_STR }, { MTP_PROPERTY_DURATION, MTP_TYPE_UINT32 }, { MTP_PROPERTY_DESCRIPTION, MTP_TYPE_STR }, { MTP_PROPERTY_AUDIO_WAVE_CODEC, MTP_TYPE_UINT32 }, { MTP_PROPERTY_BITRATE_TYPE, MTP_TYPE_UINT16 }, { MTP_PROPERTY_AUDIO_BITRATE, MTP_TYPE_UINT32 }, { MTP_PROPERTY_NUMBER_OF_CHANNELS,MTP_TYPE_UINT16 }, { MTP_PROPERTY_SAMPLE_RATE, MTP_TYPE_UINT32 }, }; static const PropertyTableEntry kDevicePropertyTable[] = { { MTP_DEVICE_PROPERTY_SYNCHRONIZATION_PARTNER, MTP_TYPE_STR }, { MTP_DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME, MTP_TYPE_STR }, { MTP_DEVICE_PROPERTY_IMAGE_SIZE, MTP_TYPE_STR }, { MTP_DEVICE_PROPERTY_BATTERY_LEVEL, MTP_TYPE_UINT8 }, { MTP_DEVICE_PROPERTY_PERCEIVED_DEVICE_TYPE, MTP_TYPE_UINT32 }, { MTP_DEVICE_PROPERTY_SESSION_INITIATOR_VERSION_INFO, MTP_TYPE_STR }, }; bool MtpDatabase::getObjectPropertyInfo(MtpObjectProperty property, int& type) { int count = sizeof(kObjectPropertyTable) / sizeof(kObjectPropertyTable[0]); const PropertyTableEntry* entry = kObjectPropertyTable; for (int i = 0; i < count; i++, entry++) { if (entry->property == property) { type = entry->type; return true; } } return false; } bool MtpDatabase::getDevicePropertyInfo(MtpDeviceProperty property, int& type) { int count = sizeof(kDevicePropertyTable) / sizeof(kDevicePropertyTable[0]); const PropertyTableEntry* entry = kDevicePropertyTable; for (int i = 0; i < count; i++, entry++) { if (entry->property == property) { type = entry->type; return true; } } return false; } MtpObjectHandleList* MtpDatabase::getObjectReferences(MtpObjectHandle handle) { JNIEnv* env = AndroidRuntime::getJNIEnv(); jintArray array = (jintArray)env->CallObjectMethod(mDatabase, method_getObjectReferences, (jint)handle); if (!array) return NULL; MtpObjectHandleList* list = new MtpObjectHandleList(); jint* handles = env->GetIntArrayElements(array, 0); jsize length = env->GetArrayLength(array); for (int i = 0; i < length; i++) list->push_back(handles[i]); env->ReleaseIntArrayElements(array, handles, 0); env->DeleteLocalRef(array); checkAndClearExceptionFromCallback(env, __FUNCTION__); return list; } MtpResponseCode MtpDatabase::setObjectReferences(MtpObjectHandle handle, MtpObjectHandleList* references) { JNIEnv* env = AndroidRuntime::getJNIEnv(); int count = references->size(); jintArray array = env->NewIntArray(count); if (!array) { ALOGE("out of memory in setObjectReferences"); return false; } jint* handles = env->GetIntArrayElements(array, 0); for (int i = 0; i < count; i++) handles[i] = (*references)[i]; env->ReleaseIntArrayElements(array, handles, 0); MtpResponseCode result = env->CallIntMethod(mDatabase, method_setObjectReferences, (jint)handle, array); env->DeleteLocalRef(array); checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } MtpProperty* MtpDatabase::getObjectPropertyDesc(MtpObjectProperty property, MtpObjectFormat format) { static const int channelEnum[] = { 1, // mono 2, // stereo 3, // 2.1 4, // 3 5, // 3.1 6, // 4 7, // 4.1 8, // 5 9, // 5.1 }; static const int bitrateEnum[] = { 1, // fixed rate 2, // variable rate }; MtpProperty* result = NULL; switch (property) { case MTP_PROPERTY_OBJECT_FORMAT: // use format as default value result = new MtpProperty(property, MTP_TYPE_UINT16, false, format); break; case MTP_PROPERTY_PROTECTION_STATUS: case MTP_PROPERTY_TRACK: result = new MtpProperty(property, MTP_TYPE_UINT16); break; case MTP_PROPERTY_STORAGE_ID: case MTP_PROPERTY_PARENT_OBJECT: case MTP_PROPERTY_DURATION: case MTP_PROPERTY_AUDIO_WAVE_CODEC: result = new MtpProperty(property, MTP_TYPE_UINT32); break; case MTP_PROPERTY_OBJECT_SIZE: result = new MtpProperty(property, MTP_TYPE_UINT64); break; case MTP_PROPERTY_PERSISTENT_UID: result = new MtpProperty(property, MTP_TYPE_UINT128); break; case MTP_PROPERTY_NAME: case MTP_PROPERTY_DISPLAY_NAME: case MTP_PROPERTY_ARTIST: case MTP_PROPERTY_ALBUM_NAME: case MTP_PROPERTY_ALBUM_ARTIST: case MTP_PROPERTY_GENRE: case MTP_PROPERTY_COMPOSER: case MTP_PROPERTY_DESCRIPTION: result = new MtpProperty(property, MTP_TYPE_STR); break; case MTP_PROPERTY_DATE_MODIFIED: case MTP_PROPERTY_DATE_ADDED: case MTP_PROPERTY_ORIGINAL_RELEASE_DATE: result = new MtpProperty(property, MTP_TYPE_STR); result->setFormDateTime(); break; case MTP_PROPERTY_OBJECT_FILE_NAME: // We allow renaming files and folders result = new MtpProperty(property, MTP_TYPE_STR, true); break; case MTP_PROPERTY_BITRATE_TYPE: result = new MtpProperty(property, MTP_TYPE_UINT16); result->setFormEnum(bitrateEnum, sizeof(bitrateEnum)/sizeof(bitrateEnum[0])); break; case MTP_PROPERTY_AUDIO_BITRATE: result = new MtpProperty(property, MTP_TYPE_UINT32); result->setFormRange(1, 1536000, 1); break; case MTP_PROPERTY_NUMBER_OF_CHANNELS: result = new MtpProperty(property, MTP_TYPE_UINT16); result->setFormEnum(channelEnum, sizeof(channelEnum)/sizeof(channelEnum[0])); break; case MTP_PROPERTY_SAMPLE_RATE: result = new MtpProperty(property, MTP_TYPE_UINT32); result->setFormRange(8000, 48000, 1); break; } return result; } MtpProperty* MtpDatabase::getDevicePropertyDesc(MtpDeviceProperty property) { JNIEnv* env = AndroidRuntime::getJNIEnv(); MtpProperty* result = NULL; bool writable = false; // get current value jint ret = env->CallIntMethod(mDatabase, method_getDeviceProperty, (jint)property, mLongBuffer, mStringBuffer); if (ret == MTP_RESPONSE_OK) { switch (property) { case MTP_DEVICE_PROPERTY_SYNCHRONIZATION_PARTNER: case MTP_DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME: case MTP_DEVICE_PROPERTY_SESSION_INITIATOR_VERSION_INFO: writable = true; // fall through FALLTHROUGH_INTENDED; case MTP_DEVICE_PROPERTY_IMAGE_SIZE: { result = new MtpProperty(property, MTP_TYPE_STR, writable); jchar* str = env->GetCharArrayElements(mStringBuffer, 0); result->setCurrentValue(str); // for read-only properties it is safe to assume current value is default value if (!writable) result->setDefaultValue(str); env->ReleaseCharArrayElements(mStringBuffer, str, 0); break; } case MTP_DEVICE_PROPERTY_BATTERY_LEVEL: { result = new MtpProperty(property, MTP_TYPE_UINT8); jlong* arr = env->GetLongArrayElements(mLongBuffer, 0); result->setFormRange(0, arr[1], 1); result->mCurrentValue.u.u8 = (uint8_t) arr[0]; env->ReleaseLongArrayElements(mLongBuffer, arr, 0); break; } case MTP_DEVICE_PROPERTY_PERCEIVED_DEVICE_TYPE: { jlong* arr = env->GetLongArrayElements(mLongBuffer, 0); result = new MtpProperty(property, MTP_TYPE_UINT32); result->mCurrentValue.u.u32 = (uint32_t) arr[0]; env->ReleaseLongArrayElements(mLongBuffer, arr, 0); break; } default: ALOGE("Unrecognized property %x", property); } } else { ALOGE("unable to read device property, response: %04X", ret); } checkAndClearExceptionFromCallback(env, __FUNCTION__); return result; } // ---------------------------------------------------------------------------- static void android_mtp_MtpDatabase_setup(JNIEnv *env, jobject thiz) { initializeJavaIDs(env); MtpDatabase* database = new MtpDatabase(env, thiz); env->SetLongField(thiz, field_context, (jlong)database); checkAndClearExceptionFromCallback(env, __FUNCTION__); } static void android_mtp_MtpDatabase_finalize(JNIEnv *env, jobject thiz) { MtpDatabase* database = (MtpDatabase *)env->GetLongField(thiz, field_context); database->cleanup(env); delete database; env->SetLongField(thiz, field_context, 0); checkAndClearExceptionFromCallback(env, __FUNCTION__); } static jstring android_mtp_MtpPropertyGroup_format_date_time(JNIEnv *env, jobject /*thiz*/, jlong seconds) { char date[20]; formatDateTime(seconds, date, sizeof(date)); return env->NewStringUTF(date); } // ---------------------------------------------------------------------------- static const JNINativeMethod gMtpDatabaseMethods[] = { {"native_setup", "()V", (void *)android_mtp_MtpDatabase_setup}, {"native_finalize", "()V", (void *)android_mtp_MtpDatabase_finalize}, }; static const JNINativeMethod gMtpPropertyGroupMethods[] = { {"format_date_time", "(J)Ljava/lang/String;", (void *)android_mtp_MtpPropertyGroup_format_date_time}, }; \ int register_android_mtp_MtpDatabase(JNIEnv *env) { if (AndroidRuntime::registerNativeMethods(env, "android/mtp/MtpDatabase", gMtpDatabaseMethods, NELEM(gMtpDatabaseMethods))) return -1; return AndroidRuntime::registerNativeMethods(env, "android/mtp/MtpPropertyGroup", gMtpPropertyGroupMethods, NELEM(gMtpPropertyGroupMethods)); }