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Diffstat (limited to 'media/jni/android_mtp_MtpDatabase.cpp')
-rw-r--r--media/jni/android_mtp_MtpDatabase.cpp119
1 files changed, 58 insertions, 61 deletions
diff --git a/media/jni/android_mtp_MtpDatabase.cpp b/media/jni/android_mtp_MtpDatabase.cpp
index 4efdcaccf7a1..ffed4747d3ea 100644
--- a/media/jni/android_mtp_MtpDatabase.cpp
+++ b/media/jni/android_mtp_MtpDatabase.cpp
@@ -32,6 +32,7 @@
#include <android_runtime/AndroidRuntime.h>
#include <android_runtime/Log.h>
+#include "core_jni_helpers.h"
#include <jni.h>
#include <media/stagefright/NuMediaExtractor.h>
#include <nativehelper/JNIHelp.h>
@@ -48,6 +49,7 @@ using namespace android;
// ----------------------------------------------------------------------------
+// MtpDatabase methods
static jmethodID method_beginSendObject;
static jmethodID method_endSendObject;
static jmethodID method_rescanFile;
@@ -75,6 +77,7 @@ static jmethodID method_endCopyObject;
static jmethodID method_getObjectReferences;
static jmethodID method_setObjectReferences;
+// MtpDatabase fields.
static jfieldID field_context;
// MtpPropertyList methods
@@ -86,6 +89,59 @@ 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);
@@ -1280,6 +1336,7 @@ MtpProperty* MtpDatabase::getDevicePropertyDesc(MtpDeviceProperty property) {
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__);
@@ -1314,69 +1371,9 @@ static const JNINativeMethod gMtpPropertyGroupMethods[] = {
{"format_date_time", "(J)Ljava/lang/String;",
(void *)android_mtp_MtpPropertyGroup_format_date_time},
};
-
-#define GET_METHOD_ID(name, jclass, signature) \
- method_##name = env->GetMethodID(jclass, #name, signature); \
- if (method_##name == NULL) { \
- ALOGE("Can't find " #name); \
- return -1; \
- } \
-
+ \
int register_android_mtp_MtpDatabase(JNIEnv *env)
{
- jclass clazz;
-
- clazz = env->FindClass("android/mtp/MtpDatabase");
- if (clazz == NULL) {
- ALOGE("Can't find android/mtp/MtpDatabase");
- return -1;
- }
- GET_METHOD_ID(beginSendObject, clazz, "(Ljava/lang/String;III)I");
- GET_METHOD_ID(endSendObject, clazz, "(IZ)V");
- GET_METHOD_ID(rescanFile, clazz, "(Ljava/lang/String;II)V");
- GET_METHOD_ID(getObjectList, clazz, "(III)[I");
- GET_METHOD_ID(getNumObjects, clazz, "(III)I");
- GET_METHOD_ID(getSupportedPlaybackFormats, clazz, "()[I");
- GET_METHOD_ID(getSupportedCaptureFormats, clazz, "()[I");
- GET_METHOD_ID(getSupportedObjectProperties, clazz, "(I)[I");
- GET_METHOD_ID(getSupportedDeviceProperties, clazz, "()[I");
- GET_METHOD_ID(setObjectProperty, clazz, "(IIJLjava/lang/String;)I");
- GET_METHOD_ID(getDeviceProperty, clazz, "(I[J[C)I");
- GET_METHOD_ID(setDeviceProperty, clazz, "(IJLjava/lang/String;)I");
- GET_METHOD_ID(getObjectPropertyList, clazz, "(IIIII)Landroid/mtp/MtpPropertyList;");
- GET_METHOD_ID(getObjectInfo, clazz, "(I[I[C[J)Z");
- GET_METHOD_ID(getObjectFilePath, clazz, "(I[C[J)I");
- GET_METHOD_ID(openFilePath, clazz, "(Ljava/lang/String;Z)I");
- GET_METHOD_ID(getThumbnailInfo, clazz, "(I[J)Z");
- GET_METHOD_ID(getThumbnailData, clazz, "(I)[B");
- GET_METHOD_ID(beginDeleteObject, clazz, "(I)I");
- GET_METHOD_ID(endDeleteObject, clazz, "(IZ)V");
- GET_METHOD_ID(beginMoveObject, clazz, "(III)I");
- GET_METHOD_ID(endMoveObject, clazz, "(IIIIIZ)V");
- GET_METHOD_ID(beginCopyObject, clazz, "(III)I");
- GET_METHOD_ID(endCopyObject, clazz, "(IZ)V");
- GET_METHOD_ID(getObjectReferences, clazz, "(I)[I");
- GET_METHOD_ID(setObjectReferences, clazz, "(I[I)I");
-
- field_context = env->GetFieldID(clazz, "mNativeContext", "J");
- if (field_context == NULL) {
- ALOGE("Can't find MtpDatabase.mNativeContext");
- return -1;
- }
-
- clazz = env->FindClass("android/mtp/MtpPropertyList");
- if (clazz == NULL) {
- ALOGE("Can't find android/mtp/MtpPropertyList");
- return -1;
- }
- GET_METHOD_ID(getCode, clazz, "()I");
- GET_METHOD_ID(getCount, clazz, "()I");
- GET_METHOD_ID(getObjectHandles, clazz, "()[I");
- GET_METHOD_ID(getPropertyCodes, clazz, "()[I");
- GET_METHOD_ID(getDataTypes, clazz, "()[I");
- GET_METHOD_ID(getLongValues, clazz, "()[J");
- GET_METHOD_ID(getStringValues, clazz, "()[Ljava/lang/String;");
-
if (AndroidRuntime::registerNativeMethods(env,
"android/mtp/MtpDatabase", gMtpDatabaseMethods, NELEM(gMtpDatabaseMethods)))
return -1;
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-03 06:38:50 +0000