diff options
Diffstat (limited to 'media/jni/android_mtp_MtpDevice.cpp')
| -rw-r--r-- | media/jni/android_mtp_MtpDevice.cpp | 346 |
1 files changed, 97 insertions, 249 deletions
diff --git a/media/jni/android_mtp_MtpDevice.cpp b/media/jni/android_mtp_MtpDevice.cpp index 060eaf9ccad4..3d2b00fec26c 100644 --- a/media/jni/android_mtp_MtpDevice.cpp +++ b/media/jni/android_mtp_MtpDevice.cpp @@ -34,6 +34,7 @@ #include "android_runtime/AndroidRuntime.h" #include "android_runtime/Log.h" +#include "core_jni_helpers.h" #include "nativehelper/ScopedLocalRef.h" #include "private/android_filesystem_config.h" @@ -107,6 +108,95 @@ static jfieldID field_event_parameter1; static jfieldID field_event_parameter2; static jfieldID field_event_parameter3; +// Initializer for the jclasses, jfieldIDs and jmethodIDs declared above. This method must be +// invoked before using these static fields for JNI accesses. +static void initializeJavaIDs(JNIEnv* env) { + static std::once_flag sJniInitialized; + + std::call_once(sJniInitialized, [](JNIEnv* env) { + clazz_deviceInfo = + (jclass)env->NewGlobalRef(FindClassOrDie(env, "android/mtp/MtpDeviceInfo")); + constructor_deviceInfo = GetMethodIDOrDie(env, clazz_deviceInfo, "<init>", "()V"); + field_deviceInfo_manufacturer = + GetFieldIDOrDie(env, clazz_deviceInfo, "mManufacturer", "Ljava/lang/String;"); + field_deviceInfo_model = + GetFieldIDOrDie(env, clazz_deviceInfo, "mModel", "Ljava/lang/String;"); + field_deviceInfo_version = + GetFieldIDOrDie(env, clazz_deviceInfo, "mVersion", "Ljava/lang/String;"); + field_deviceInfo_serialNumber = + GetFieldIDOrDie(env, clazz_deviceInfo, "mSerialNumber", "Ljava/lang/String;"); + field_deviceInfo_operationsSupported = + GetFieldIDOrDie(env, clazz_deviceInfo, "mOperationsSupported", "[I"); + field_deviceInfo_eventsSupported = + GetFieldIDOrDie(env, clazz_deviceInfo, "mEventsSupported", "[I"); + + clazz_storageInfo = + (jclass)env->NewGlobalRef(FindClassOrDie(env, "android/mtp/MtpStorageInfo")); + constructor_storageInfo = GetMethodIDOrDie(env, clazz_storageInfo, "<init>", "()V"); + field_storageInfo_storageId = GetFieldIDOrDie(env, clazz_storageInfo, "mStorageId", "I"); + field_storageInfo_maxCapacity = + GetFieldIDOrDie(env, clazz_storageInfo, "mMaxCapacity", "J"); + field_storageInfo_freeSpace = + GetFieldIDOrDie(env, clazz_storageInfo, "mFreeSpace", "J"); + field_storageInfo_description = + GetFieldIDOrDie(env, clazz_storageInfo, "mDescription", "Ljava/lang/String;"); + field_storageInfo_volumeIdentifier = + GetFieldIDOrDie(env, clazz_storageInfo, "mVolumeIdentifier", "Ljava/lang/String;"); + + clazz_objectInfo = + (jclass)env->NewGlobalRef(FindClassOrDie(env, "android/mtp/MtpObjectInfo")); + constructor_objectInfo = GetMethodIDOrDie(env, clazz_objectInfo, "<init>", "()V"); + field_objectInfo_handle = GetFieldIDOrDie(env, clazz_objectInfo, "mHandle", "I"); + field_objectInfo_storageId = GetFieldIDOrDie(env, clazz_objectInfo, "mStorageId", "I"); + field_objectInfo_format = GetFieldIDOrDie(env, clazz_objectInfo, "mFormat", "I"); + field_objectInfo_protectionStatus = + GetFieldIDOrDie(env, clazz_objectInfo, "mProtectionStatus", "I"); + field_objectInfo_compressedSize = + GetFieldIDOrDie(env, clazz_objectInfo, "mCompressedSize", "I"); + field_objectInfo_thumbFormat = GetFieldIDOrDie(env, clazz_objectInfo, "mThumbFormat", "I"); + field_objectInfo_thumbCompressedSize = + GetFieldIDOrDie(env, clazz_objectInfo, "mThumbCompressedSize", "I"); + field_objectInfo_thumbPixWidth = + GetFieldIDOrDie(env, clazz_objectInfo, "mThumbPixWidth", "I"); + field_objectInfo_thumbPixHeight = + GetFieldIDOrDie(env, clazz_objectInfo, "mThumbPixHeight", "I"); + field_objectInfo_imagePixWidth = + GetFieldIDOrDie(env, clazz_objectInfo, "mImagePixWidth", "I"); + field_objectInfo_imagePixHeight = + GetFieldIDOrDie(env, clazz_objectInfo, "mImagePixHeight", "I"); + field_objectInfo_imagePixDepth = + GetFieldIDOrDie(env, clazz_objectInfo, "mImagePixDepth", "I"); + field_objectInfo_parent = GetFieldIDOrDie(env, clazz_objectInfo, "mParent", "I"); + field_objectInfo_associationType = + GetFieldIDOrDie(env, clazz_objectInfo, "mAssociationType", "I"); + field_objectInfo_associationDesc = + GetFieldIDOrDie(env, clazz_objectInfo, "mAssociationDesc", "I"); + field_objectInfo_sequenceNumber = + GetFieldIDOrDie(env, clazz_objectInfo, "mSequenceNumber", "I"); + field_objectInfo_name = + GetFieldIDOrDie(env, clazz_objectInfo, "mName", "Ljava/lang/String;"); + field_objectInfo_dateCreated = GetFieldIDOrDie(env, clazz_objectInfo, "mDateCreated", "J"); + field_objectInfo_dateModified = + GetFieldIDOrDie(env, clazz_objectInfo, "mDateModified", "J"); + field_objectInfo_keywords = + GetFieldIDOrDie(env, clazz_objectInfo, "mKeywords", "Ljava/lang/String;"); + + clazz_event = (jclass)env->NewGlobalRef(FindClassOrDie(env, "android/mtp/MtpEvent")); + constructor_event = GetMethodIDOrDie(env, clazz_event, "<init>", "()V"); + field_event_eventCode = GetFieldIDOrDie(env, clazz_event, "mEventCode", "I"); + field_event_parameter1 = GetFieldIDOrDie(env, clazz_event, "mParameter1", "I"); + field_event_parameter2 = GetFieldIDOrDie(env, clazz_event, "mParameter2", "I"); + field_event_parameter3 = GetFieldIDOrDie(env, clazz_event, "mParameter3", "I"); + + const jclass clazz = FindClassOrDie(env, "android/mtp/MtpDevice"); + field_context = GetFieldIDOrDie(env, clazz, "mNativeContext", "J"); + + clazz_io_exception = (jclass)env->NewGlobalRef(FindClassOrDie(env, "java/io/IOException")); + clazz_operation_canceled_exception = + (jclass)env->NewGlobalRef(FindClassOrDie(env, "android/os/OperationCanceledException")); + }, env); +} + class JavaArrayWriter { public: JavaArrayWriter(JNIEnv* env, jbyteArray array) : @@ -132,6 +222,11 @@ private: MtpDevice* get_device_from_object(JNIEnv* env, jobject javaDevice) { + // get_device_from_object() is called by the majority of JNI methods in this file. Call + // `initializeJavaIDs()` here to ensure JNI methodID's, fieldIDs and classes are initialized + // before use. + initializeJavaIDs(env); + return (MtpDevice*)env->GetLongField(javaDevice, field_context); } @@ -200,6 +295,8 @@ android_mtp_MtpDevice_open(JNIEnv *env, jobject thiz, jstring deviceName, jint f MtpDevice* device = MtpDevice::open(deviceNameStr, fd); env->ReleaseStringUTFChars(deviceName, deviceNameStr); + // The jfieldID `field_context` needs to be initialized before use below. + initializeJavaIDs(env); if (device) env->SetLongField(thiz, field_context, (jlong)device); return (jboolean)(device != NULL); @@ -781,256 +878,7 @@ static const JNINativeMethod gMethods[] = { int register_android_mtp_MtpDevice(JNIEnv *env) { - jclass clazz; - ALOGD("register_android_mtp_MtpDevice\n"); - - clazz = env->FindClass("android/mtp/MtpDeviceInfo"); - if (clazz == NULL) { - ALOGE("Can't find android/mtp/MtpDeviceInfo"); - return -1; - } - constructor_deviceInfo = env->GetMethodID(clazz, "<init>", "()V"); - if (constructor_deviceInfo == NULL) { - ALOGE("Can't find android/mtp/MtpDeviceInfo constructor"); - return -1; - } - field_deviceInfo_manufacturer = env->GetFieldID(clazz, "mManufacturer", "Ljava/lang/String;"); - if (field_deviceInfo_manufacturer == NULL) { - ALOGE("Can't find MtpDeviceInfo.mManufacturer"); - return -1; - } - field_deviceInfo_model = env->GetFieldID(clazz, "mModel", "Ljava/lang/String;"); - if (field_deviceInfo_model == NULL) { - ALOGE("Can't find MtpDeviceInfo.mModel"); - return -1; - } - field_deviceInfo_version = env->GetFieldID(clazz, "mVersion", "Ljava/lang/String;"); - if (field_deviceInfo_version == NULL) { - ALOGE("Can't find MtpDeviceInfo.mVersion"); - return -1; - } - field_deviceInfo_serialNumber = env->GetFieldID(clazz, "mSerialNumber", "Ljava/lang/String;"); - if (field_deviceInfo_serialNumber == NULL) { - ALOGE("Can't find MtpDeviceInfo.mSerialNumber"); - return -1; - } - field_deviceInfo_operationsSupported = env->GetFieldID(clazz, "mOperationsSupported", "[I"); - if (field_deviceInfo_operationsSupported == NULL) { - ALOGE("Can't find MtpDeviceInfo.mOperationsSupported"); - return -1; - } - field_deviceInfo_eventsSupported = env->GetFieldID(clazz, "mEventsSupported", "[I"); - if (field_deviceInfo_eventsSupported == NULL) { - ALOGE("Can't find MtpDeviceInfo.mEventsSupported"); - return -1; - } - clazz_deviceInfo = (jclass)env->NewGlobalRef(clazz); - - clazz = env->FindClass("android/mtp/MtpStorageInfo"); - if (clazz == NULL) { - ALOGE("Can't find android/mtp/MtpStorageInfo"); - return -1; - } - constructor_storageInfo = env->GetMethodID(clazz, "<init>", "()V"); - if (constructor_storageInfo == NULL) { - ALOGE("Can't find android/mtp/MtpStorageInfo constructor"); - return -1; - } - field_storageInfo_storageId = env->GetFieldID(clazz, "mStorageId", "I"); - if (field_storageInfo_storageId == NULL) { - ALOGE("Can't find MtpStorageInfo.mStorageId"); - return -1; - } - field_storageInfo_maxCapacity = env->GetFieldID(clazz, "mMaxCapacity", "J"); - if (field_storageInfo_maxCapacity == NULL) { - ALOGE("Can't find MtpStorageInfo.mMaxCapacity"); - return -1; - } - field_storageInfo_freeSpace = env->GetFieldID(clazz, "mFreeSpace", "J"); - if (field_storageInfo_freeSpace == NULL) { - ALOGE("Can't find MtpStorageInfo.mFreeSpace"); - return -1; - } - field_storageInfo_description = env->GetFieldID(clazz, "mDescription", "Ljava/lang/String;"); - if (field_storageInfo_description == NULL) { - ALOGE("Can't find MtpStorageInfo.mDescription"); - return -1; - } - field_storageInfo_volumeIdentifier = env->GetFieldID(clazz, "mVolumeIdentifier", "Ljava/lang/String;"); - if (field_storageInfo_volumeIdentifier == NULL) { - ALOGE("Can't find MtpStorageInfo.mVolumeIdentifier"); - return -1; - } - clazz_storageInfo = (jclass)env->NewGlobalRef(clazz); - - clazz = env->FindClass("android/mtp/MtpObjectInfo"); - if (clazz == NULL) { - ALOGE("Can't find android/mtp/MtpObjectInfo"); - return -1; - } - constructor_objectInfo = env->GetMethodID(clazz, "<init>", "()V"); - if (constructor_objectInfo == NULL) { - ALOGE("Can't find android/mtp/MtpObjectInfo constructor"); - return -1; - } - field_objectInfo_handle = env->GetFieldID(clazz, "mHandle", "I"); - if (field_objectInfo_handle == NULL) { - ALOGE("Can't find MtpObjectInfo.mHandle"); - return -1; - } - field_objectInfo_storageId = env->GetFieldID(clazz, "mStorageId", "I"); - if (field_objectInfo_storageId == NULL) { - ALOGE("Can't find MtpObjectInfo.mStorageId"); - return -1; - } - field_objectInfo_format = env->GetFieldID(clazz, "mFormat", "I"); - if (field_objectInfo_format == NULL) { - ALOGE("Can't find MtpObjectInfo.mFormat"); - return -1; - } - field_objectInfo_protectionStatus = env->GetFieldID(clazz, "mProtectionStatus", "I"); - if (field_objectInfo_protectionStatus == NULL) { - ALOGE("Can't find MtpObjectInfo.mProtectionStatus"); - return -1; - } - field_objectInfo_compressedSize = env->GetFieldID(clazz, "mCompressedSize", "I"); - if (field_objectInfo_compressedSize == NULL) { - ALOGE("Can't find MtpObjectInfo.mCompressedSize"); - return -1; - } - field_objectInfo_thumbFormat = env->GetFieldID(clazz, "mThumbFormat", "I"); - if (field_objectInfo_thumbFormat == NULL) { - ALOGE("Can't find MtpObjectInfo.mThumbFormat"); - return -1; - } - field_objectInfo_thumbCompressedSize = env->GetFieldID(clazz, "mThumbCompressedSize", "I"); - if (field_objectInfo_thumbCompressedSize == NULL) { - ALOGE("Can't find MtpObjectInfo.mThumbCompressedSize"); - return -1; - } - field_objectInfo_thumbPixWidth = env->GetFieldID(clazz, "mThumbPixWidth", "I"); - if (field_objectInfo_thumbPixWidth == NULL) { - ALOGE("Can't find MtpObjectInfo.mThumbPixWidth"); - return -1; - } - field_objectInfo_thumbPixHeight = env->GetFieldID(clazz, "mThumbPixHeight", "I"); - if (field_objectInfo_thumbPixHeight == NULL) { - ALOGE("Can't find MtpObjectInfo.mThumbPixHeight"); - return -1; - } - field_objectInfo_imagePixWidth = env->GetFieldID(clazz, "mImagePixWidth", "I"); - if (field_objectInfo_imagePixWidth == NULL) { - ALOGE("Can't find MtpObjectInfo.mImagePixWidth"); - return -1; - } - field_objectInfo_imagePixHeight = env->GetFieldID(clazz, "mImagePixHeight", "I"); - if (field_objectInfo_imagePixHeight == NULL) { - ALOGE("Can't find MtpObjectInfo.mImagePixHeight"); - return -1; - } - field_objectInfo_imagePixDepth = env->GetFieldID(clazz, "mImagePixDepth", "I"); - if (field_objectInfo_imagePixDepth == NULL) { - ALOGE("Can't find MtpObjectInfo.mImagePixDepth"); - return -1; - } - field_objectInfo_parent = env->GetFieldID(clazz, "mParent", "I"); - if (field_objectInfo_parent == NULL) { - ALOGE("Can't find MtpObjectInfo.mParent"); - return -1; - } - field_objectInfo_associationType = env->GetFieldID(clazz, "mAssociationType", "I"); - if (field_objectInfo_associationType == NULL) { - ALOGE("Can't find MtpObjectInfo.mAssociationType"); - return -1; - } - field_objectInfo_associationDesc = env->GetFieldID(clazz, "mAssociationDesc", "I"); - if (field_objectInfo_associationDesc == NULL) { - ALOGE("Can't find MtpObjectInfo.mAssociationDesc"); - return -1; - } - field_objectInfo_sequenceNumber = env->GetFieldID(clazz, "mSequenceNumber", "I"); - if (field_objectInfo_sequenceNumber == NULL) { - ALOGE("Can't find MtpObjectInfo.mSequenceNumber"); - return -1; - } - field_objectInfo_name = env->GetFieldID(clazz, "mName", "Ljava/lang/String;"); - if (field_objectInfo_name == NULL) { - ALOGE("Can't find MtpObjectInfo.mName"); - return -1; - } - field_objectInfo_dateCreated = env->GetFieldID(clazz, "mDateCreated", "J"); - if (field_objectInfo_dateCreated == NULL) { - ALOGE("Can't find MtpObjectInfo.mDateCreated"); - return -1; - } - field_objectInfo_dateModified = env->GetFieldID(clazz, "mDateModified", "J"); - if (field_objectInfo_dateModified == NULL) { - ALOGE("Can't find MtpObjectInfo.mDateModified"); - return -1; - } - field_objectInfo_keywords = env->GetFieldID(clazz, "mKeywords", "Ljava/lang/String;"); - if (field_objectInfo_keywords == NULL) { - ALOGE("Can't find MtpObjectInfo.mKeywords"); - return -1; - } - clazz_objectInfo = (jclass)env->NewGlobalRef(clazz); - - clazz = env->FindClass("android/mtp/MtpEvent"); - if (clazz == NULL) { - ALOGE("Can't find android/mtp/MtpEvent"); - return -1; - } - constructor_event = env->GetMethodID(clazz, "<init>", "()V"); - if (constructor_event == NULL) { - ALOGE("Can't find android/mtp/MtpEvent constructor"); - return -1; - } - field_event_eventCode = env->GetFieldID(clazz, "mEventCode", "I"); - if (field_event_eventCode == NULL) { - ALOGE("Can't find MtpObjectInfo.mEventCode"); - return -1; - } - field_event_parameter1 = env->GetFieldID(clazz, "mParameter1", "I"); - if (field_event_parameter1 == NULL) { - ALOGE("Can't find MtpObjectInfo.mParameter1"); - return -1; - } - field_event_parameter2 = env->GetFieldID(clazz, "mParameter2", "I"); - if (field_event_parameter2 == NULL) { - ALOGE("Can't find MtpObjectInfo.mParameter2"); - return -1; - } - field_event_parameter3 = env->GetFieldID(clazz, "mParameter3", "I"); - if (field_event_parameter3 == NULL) { - ALOGE("Can't find MtpObjectInfo.mParameter3"); - return -1; - } - clazz_event = (jclass)env->NewGlobalRef(clazz); - - clazz = env->FindClass("android/mtp/MtpDevice"); - if (clazz == NULL) { - ALOGE("Can't find android/mtp/MtpDevice"); - return -1; - } - field_context = env->GetFieldID(clazz, "mNativeContext", "J"); - if (field_context == NULL) { - ALOGE("Can't find MtpDevice.mNativeContext"); - return -1; - } - clazz = env->FindClass("java/io/IOException"); - if (clazz == NULL) { - ALOGE("Can't find java.io.IOException"); - return -1; - } - clazz_io_exception = (jclass)env->NewGlobalRef(clazz); - clazz = env->FindClass("android/os/OperationCanceledException"); - if (clazz == NULL) { - ALOGE("Can't find android.os.OperationCanceledException"); - return -1; - } - clazz_operation_canceled_exception = (jclass)env->NewGlobalRef(clazz); - return AndroidRuntime::registerNativeMethods(env, "android/mtp/MtpDevice", gMethods, NELEM(gMethods)); } |