Add API for uploading files to MTP devices.

Bug: 22545670
Change-Id: I038c54db06b7cf780bd027d76693e98c685d57a7

5 files changed, 364 insertions, 44 deletions

diff --git a/api/current.txt b/api/current.txt
index 47b8aeb0a59a..4ffd52c1a286 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -18091,6 +18091,8 @@ package android.mtp {
     method public boolean importFile(int, java.lang.String);
     method public boolean importFile(int, android.os.ParcelFileDescriptor);
     method public boolean open(android.hardware.usb.UsbDeviceConnection);
+    method public boolean sendObject(int, android.os.ParcelFileDescriptor);
+    method public android.mtp.MtpObjectInfo sendObjectInfo(android.mtp.MtpObjectInfo);
   }
 
   public class MtpDeviceInfo {
@@ -18123,6 +18125,31 @@ package android.mtp {
     method public final int getThumbPixWidth();
   }
 
+  public class MtpObjectInfo.Builder {
+    ctor public MtpObjectInfo.Builder();
+    ctor public MtpObjectInfo.Builder(android.mtp.MtpObjectInfo);
+    method public android.mtp.MtpObjectInfo build();
+    method public android.mtp.MtpObjectInfo.Builder setAssociationDesc(int);
+    method public android.mtp.MtpObjectInfo.Builder setAssociationType(int);
+    method public android.mtp.MtpObjectInfo.Builder setCompressedSize(int);
+    method public android.mtp.MtpObjectInfo.Builder setDateCreated(long);
+    method public android.mtp.MtpObjectInfo.Builder setDateModified(long);
+    method public android.mtp.MtpObjectInfo.Builder setFormat(int);
+    method public android.mtp.MtpObjectInfo.Builder setImagePixDepth(int);
+    method public android.mtp.MtpObjectInfo.Builder setImagePixHeight(int);
+    method public android.mtp.MtpObjectInfo.Builder setImagePixWidth(int);
+    method public android.mtp.MtpObjectInfo.Builder setKeywords(java.lang.String);
+    method public android.mtp.MtpObjectInfo.Builder setName(java.lang.String);
+    method public android.mtp.MtpObjectInfo.Builder setParent(int);
+    method public android.mtp.MtpObjectInfo.Builder setProtectionStatus(int);
+    method public android.mtp.MtpObjectInfo.Builder setSequenceNumber(int);
+    method public android.mtp.MtpObjectInfo.Builder setStorageId(int);
+    method public android.mtp.MtpObjectInfo.Builder setThumbCompressedSize(int);
+    method public android.mtp.MtpObjectInfo.Builder setThumbFormat(int);
+    method public android.mtp.MtpObjectInfo.Builder setThumbPixHeight(int);
+    method public android.mtp.MtpObjectInfo.Builder setThumbPixWidth(int);
+  }
+
   public final class MtpStorageInfo {
     method public final java.lang.String getDescription();
     method public final long getFreeSpace();
diff --git a/api/system-current.txt b/api/system-current.txt
index 45a90e0bfde7..30086e666ffb 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -19603,6 +19603,8 @@ package android.mtp {
     method public boolean importFile(int, java.lang.String);
     method public boolean importFile(int, android.os.ParcelFileDescriptor);
     method public boolean open(android.hardware.usb.UsbDeviceConnection);
+    method public boolean sendObject(int, android.os.ParcelFileDescriptor);
+    method public android.mtp.MtpObjectInfo sendObjectInfo(android.mtp.MtpObjectInfo);
   }
 
   public class MtpDeviceInfo {
@@ -19635,6 +19637,31 @@ package android.mtp {
     method public final int getThumbPixWidth();
   }
 
+  public class MtpObjectInfo.Builder {
+    ctor public MtpObjectInfo.Builder();
+    ctor public MtpObjectInfo.Builder(android.mtp.MtpObjectInfo);
+    method public android.mtp.MtpObjectInfo build();
+    method public android.mtp.MtpObjectInfo.Builder setAssociationDesc(int);
+    method public android.mtp.MtpObjectInfo.Builder setAssociationType(int);
+    method public android.mtp.MtpObjectInfo.Builder setCompressedSize(int);
+    method public android.mtp.MtpObjectInfo.Builder setDateCreated(long);
+    method public android.mtp.MtpObjectInfo.Builder setDateModified(long);
+    method public android.mtp.MtpObjectInfo.Builder setFormat(int);
+    method public android.mtp.MtpObjectInfo.Builder setImagePixDepth(int);
+    method public android.mtp.MtpObjectInfo.Builder setImagePixHeight(int);
+    method public android.mtp.MtpObjectInfo.Builder setImagePixWidth(int);
+    method public android.mtp.MtpObjectInfo.Builder setKeywords(java.lang.String);
+    method public android.mtp.MtpObjectInfo.Builder setName(java.lang.String);
+    method public android.mtp.MtpObjectInfo.Builder setParent(int);
+    method public android.mtp.MtpObjectInfo.Builder setProtectionStatus(int);
+    method public android.mtp.MtpObjectInfo.Builder setSequenceNumber(int);
+    method public android.mtp.MtpObjectInfo.Builder setStorageId(int);
+    method public android.mtp.MtpObjectInfo.Builder setThumbCompressedSize(int);
+    method public android.mtp.MtpObjectInfo.Builder setThumbFormat(int);
+    method public android.mtp.MtpObjectInfo.Builder setThumbPixHeight(int);
+    method public android.mtp.MtpObjectInfo.Builder setThumbPixWidth(int);
+  }
+
   public final class MtpStorageInfo {
     method public final java.lang.String getDescription();
     method public final long getFreeSpace();
diff --git a/media/java/android/mtp/MtpDevice.java b/media/java/android/mtp/MtpDevice.java
index a9611c52f75e..fbe047dea1d7 100644
--- a/media/java/android/mtp/MtpDevice.java
+++ b/media/java/android/mtp/MtpDevice.java
@@ -250,6 +250,33 @@ public final class MtpDevice {
         return native_import_file(objectHandle, descriptor.getFd());
     }
 
+    /**
+     * Copies the data for an object from a file descriptor.
+     * This call may block for an arbitrary amount of time depending on the size
+     * of the data and speed of the devices. The file descriptor is not closed
+     * on completion, and must be done by the caller.
+     *
+     * @param objectHandle handle of the target file
+     * @param descriptor file descriptor to read the data from.
+     * @return true if the file transfer succeeds
+     */
+    public boolean sendObject(int objectHandle, ParcelFileDescriptor descriptor) {
+        return native_send_object(objectHandle, descriptor.getFd());
+    }
+
+    /**
+     * Uploads an object metadata for a new entry. The {@link MtpObjectInfo} can be
+     * created with the {@link MtpObjectInfo.Builder} class.
+     *
+     * The returned {@link MtpObjectInfo} has the new object handle field filled in.
+     *
+     * @param info metadata of the entry
+     * @return object info of the created entry
+     */
+    public MtpObjectInfo sendObjectInfo(MtpObjectInfo info) {
+        return native_send_object_info(info);
+    }
+
     // used by the JNI code
     private long mNativeContext;
 
@@ -267,4 +294,6 @@ public final class MtpDevice {
     private native long native_get_storage_id(int objectHandle);
     private native boolean native_import_file(int objectHandle, String destPath);
     private native boolean native_import_file(int objectHandle, int fd);
+    private native boolean native_send_object(int objectHandle, int fd);
+    private native MtpObjectInfo native_send_object_info(MtpObjectInfo info);
 }
diff --git a/media/java/android/mtp/MtpObjectInfo.java b/media/java/android/mtp/MtpObjectInfo.java
index 5bbfe9a6888f..d2824b556315 100644
--- a/media/java/android/mtp/MtpObjectInfo.java
+++ b/media/java/android/mtp/MtpObjectInfo.java
@@ -43,7 +43,7 @@ public final class MtpObjectInfo {
     private long mDateModified;
     private String mKeywords;
 
-    // only instantiated via JNI
+    // only instantiated via JNI or via a builder
     private MtpObjectInfo() {
     }
 
@@ -252,4 +252,154 @@ public final class MtpObjectInfo {
     public final String getKeywords() {
         return mKeywords;
     }
+
+    /**
+     * Builds a new object info instance.
+     */
+    public class Builder {
+        private MtpObjectInfo mObjectInfo;
+
+        public Builder() {
+            mObjectInfo = new MtpObjectInfo();
+            mObjectInfo.mHandle = -1;
+        }
+
+        /**
+         * Creates a builder on a copy of an existing object info.
+         * All fields, except the object handle will be copied.
+         *
+         * @param objectInfo object info of an existing entry
+         */
+        public Builder(MtpObjectInfo objectInfo) {
+            mObjectInfo = new MtpObjectInfo();
+            mObjectInfo.mHandle = -1;
+            mObjectInfo.mAssociationDesc = mObjectInfo.mAssociationDesc;
+            mObjectInfo.mAssociationType = mObjectInfo.mAssociationType;
+            mObjectInfo.mCompressedSize = mObjectInfo.mCompressedSize;
+            mObjectInfo.mDateCreated = mObjectInfo.mDateCreated;
+            mObjectInfo.mDateModified = mObjectInfo.mDateModified;
+            mObjectInfo.mFormat = mObjectInfo.mFormat;
+            mObjectInfo.mImagePixDepth = mObjectInfo.mImagePixDepth;
+            mObjectInfo.mImagePixHeight = mObjectInfo.mImagePixHeight;
+            mObjectInfo.mImagePixWidth = mObjectInfo.mImagePixWidth;
+            mObjectInfo.mKeywords = mObjectInfo.mKeywords;
+            mObjectInfo.mName = mObjectInfo.mName;
+            mObjectInfo.mParent = mObjectInfo.mParent;
+            mObjectInfo.mProtectionStatus = mObjectInfo.mProtectionStatus;
+            mObjectInfo.mSequenceNumber = mObjectInfo.mSequenceNumber;
+            mObjectInfo.mStorageId = mObjectInfo.mStorageId;
+            mObjectInfo.mThumbCompressedSize = mObjectInfo.mThumbCompressedSize;
+            mObjectInfo.mThumbFormat = mObjectInfo.mThumbFormat;
+            mObjectInfo.mThumbPixHeight = mObjectInfo.mThumbPixHeight;
+            mObjectInfo.mThumbPixWidth = mObjectInfo.mThumbPixWidth;
+        }
+
+        public Builder setAssociationDesc(int value) {
+            mObjectInfo.mAssociationDesc = value;
+            return this;
+        }
+
+        public Builder setAssociationType(int value) {
+            mObjectInfo.mAssociationType = value;
+            return this;
+        }
+
+        public Builder setCompressedSize(int value) {
+            mObjectInfo.mCompressedSize = value;
+            return this;
+        }
+
+        public Builder setDateCreated(long value) {
+            mObjectInfo.mDateCreated = value;
+            return this;
+        }
+
+        public Builder setDateModified(long value) {
+            mObjectInfo.mDateModified = value;
+            return this;
+        }
+
+        public Builder setFormat(int value) {
+            mObjectInfo.mFormat = value;
+            return this;
+        }
+
+        public Builder setImagePixDepth(int value) {
+            mObjectInfo.mImagePixDepth = value;
+            return this;
+        }
+
+        public Builder setImagePixHeight(int value) {
+            mObjectInfo.mImagePixHeight = value;
+            return this;
+        }
+
+        public Builder setImagePixWidth(int value) {
+            mObjectInfo.mImagePixWidth = value;
+            return this;
+        }
+
+        public Builder setKeywords(String value) {
+            mObjectInfo.mKeywords = value;
+            return this;
+        }
+
+        public Builder setName(String value) {
+            mObjectInfo.mName = value;
+            return this;
+        }
+
+        public Builder setParent(int value) {
+            mObjectInfo.mParent = value;
+            return this;
+        }
+
+        public Builder setProtectionStatus(int value) {
+            mObjectInfo.mProtectionStatus = value;
+            return this;
+        }
+
+        public Builder setSequenceNumber(int value) {
+            mObjectInfo.mSequenceNumber = value;
+            return this;
+        }
+
+        public Builder setStorageId(int value) {
+            mObjectInfo.mStorageId = value;
+            return this;
+        }
+
+        public Builder setThumbCompressedSize(int value) {
+            mObjectInfo.mThumbCompressedSize = value;
+            return this;
+        }
+
+        public Builder setThumbFormat(int value) {
+            mObjectInfo.mThumbFormat = value;
+            return this;
+        }
+
+        public Builder setThumbPixHeight(int value) {
+            mObjectInfo.mThumbPixHeight = value;
+            return this;
+        }
+
+        public Builder setThumbPixWidth(int value) {
+            mObjectInfo.mThumbPixWidth = value;
+            return this;
+        }
+
+        /**
+         * Builds the object info instance. Once called, methods of the builder
+         * must not be called anymore.
+         *
+         * @return the object info of the newly created file, or NULL in case
+         *         of an error.
+         */
+        public MtpObjectInfo build() {
+            MtpObjectInfo result = mObjectInfo;
+            mObjectInfo = null;
+            return result;
+        }
+    }
 }
diff --git a/media/jni/android_mtp_MtpDevice.cpp b/media/jni/android_mtp_MtpDevice.cpp
index 6652a54506e0..ad804f32fd9f 100644
--- a/media/jni/android_mtp_MtpDevice.cpp
+++ b/media/jni/android_mtp_MtpDevice.cpp
@@ -91,6 +91,55 @@ MtpDevice* get_device_from_object(JNIEnv* env, jobject javaDevice)
     return (MtpDevice*)env->GetLongField(javaDevice, field_context);
 }
 
+void fill_jobject_from_object_info(JNIEnv* env, jobject object, MtpObjectInfo* objectInfo) {
+    if (objectInfo->mHandle)
+        env->SetIntField(object, field_objectInfo_handle, objectInfo->mHandle);
+    if (objectInfo->mStorageID)
+        env->SetIntField(object, field_objectInfo_storageId, objectInfo->mStorageID);
+    if (objectInfo->mFormat)
+        env->SetIntField(object, field_objectInfo_format, objectInfo->mFormat);
+    if (objectInfo->mProtectionStatus)
+        env->SetIntField(object, field_objectInfo_protectionStatus, objectInfo->mProtectionStatus);
+    if (objectInfo->mCompressedSize)
+        env->SetIntField(object, field_objectInfo_compressedSize, objectInfo->mCompressedSize);
+    if (objectInfo->mThumbFormat)
+        env->SetIntField(object, field_objectInfo_thumbFormat, objectInfo->mThumbFormat);
+    if (objectInfo->mThumbCompressedSize) {
+        env->SetIntField(object, field_objectInfo_thumbCompressedSize,
+                objectInfo->mThumbCompressedSize);
+    }
+    if (objectInfo->mThumbPixWidth)
+        env->SetIntField(object, field_objectInfo_thumbPixWidth, objectInfo->mThumbPixWidth);
+    if (objectInfo->mThumbPixHeight)
+        env->SetIntField(object, field_objectInfo_thumbPixHeight, objectInfo->mThumbPixHeight);
+    if (objectInfo->mImagePixWidth)
+        env->SetIntField(object, field_objectInfo_imagePixWidth, objectInfo->mImagePixWidth);
+    if (objectInfo->mImagePixHeight)
+        env->SetIntField(object, field_objectInfo_imagePixHeight, objectInfo->mImagePixHeight);
+    if (objectInfo->mImagePixDepth)
+        env->SetIntField(object, field_objectInfo_imagePixDepth, objectInfo->mImagePixDepth);
+    if (objectInfo->mParent)
+        env->SetIntField(object, field_objectInfo_parent, objectInfo->mParent);
+    if (objectInfo->mAssociationType)
+        env->SetIntField(object, field_objectInfo_associationType, objectInfo->mAssociationType);
+    if (objectInfo->mAssociationDesc)
+        env->SetIntField(object, field_objectInfo_associationDesc, objectInfo->mAssociationDesc);
+    if (objectInfo->mSequenceNumber)
+        env->SetIntField(object, field_objectInfo_sequenceNumber, objectInfo->mSequenceNumber);
+    if (objectInfo->mName)
+        env->SetObjectField(object, field_objectInfo_name, env->NewStringUTF(objectInfo->mName));
+    if (objectInfo->mDateCreated)
+        env->SetLongField(object, field_objectInfo_dateCreated, objectInfo->mDateCreated * 1000LL);
+    if (objectInfo->mDateModified) {
+        env->SetLongField(object, field_objectInfo_dateModified,
+                objectInfo->mDateModified * 1000LL);
+    }
+    if (objectInfo->mKeywords) {
+        env->SetObjectField(object, field_objectInfo_keywords,
+            env->NewStringUTF(objectInfo->mKeywords));
+    }
+}
+
 // ----------------------------------------------------------------------------
 
 static jboolean
@@ -246,48 +295,7 @@ android_mtp_MtpDevice_get_object_info(JNIEnv *env, jobject thiz, jint objectID)
         return NULL;
     }
 
-    if (objectInfo->mHandle)
-        env->SetIntField(info, field_objectInfo_handle, objectInfo->mHandle);
-    if (objectInfo->mStorageID)
-        env->SetIntField(info, field_objectInfo_storageId, objectInfo->mStorageID);
-    if (objectInfo->mFormat)
-        env->SetIntField(info, field_objectInfo_format, objectInfo->mFormat);
-    if (objectInfo->mProtectionStatus)
-        env->SetIntField(info, field_objectInfo_protectionStatus, objectInfo->mProtectionStatus);
-    if (objectInfo->mCompressedSize)
-        env->SetIntField(info, field_objectInfo_compressedSize, objectInfo->mCompressedSize);
-    if (objectInfo->mThumbFormat)
-        env->SetIntField(info, field_objectInfo_thumbFormat, objectInfo->mThumbFormat);
-    if (objectInfo->mThumbCompressedSize)
-        env->SetIntField(info, field_objectInfo_thumbCompressedSize, objectInfo->mThumbCompressedSize);
-    if (objectInfo->mThumbPixWidth)
-        env->SetIntField(info, field_objectInfo_thumbPixWidth, objectInfo->mThumbPixWidth);
-    if (objectInfo->mThumbPixHeight)
-        env->SetIntField(info, field_objectInfo_thumbPixHeight, objectInfo->mThumbPixHeight);
-    if (objectInfo->mImagePixWidth)
-        env->SetIntField(info, field_objectInfo_imagePixWidth, objectInfo->mImagePixWidth);
-    if (objectInfo->mImagePixHeight)
-        env->SetIntField(info, field_objectInfo_imagePixHeight, objectInfo->mImagePixHeight);
-    if (objectInfo->mImagePixDepth)
-        env->SetIntField(info, field_objectInfo_imagePixDepth, objectInfo->mImagePixDepth);
-    if (objectInfo->mParent)
-        env->SetIntField(info, field_objectInfo_parent, objectInfo->mParent);
-    if (objectInfo->mAssociationType)
-        env->SetIntField(info, field_objectInfo_associationType, objectInfo->mAssociationType);
-    if (objectInfo->mAssociationDesc)
-        env->SetIntField(info, field_objectInfo_associationDesc, objectInfo->mAssociationDesc);
-    if (objectInfo->mSequenceNumber)
-        env->SetIntField(info, field_objectInfo_sequenceNumber, objectInfo->mSequenceNumber);
-    if (objectInfo->mName)
-        env->SetObjectField(info, field_objectInfo_name, env->NewStringUTF(objectInfo->mName));
-    if (objectInfo->mDateCreated)
-        env->SetLongField(info, field_objectInfo_dateCreated, objectInfo->mDateCreated * 1000LL);
-    if (objectInfo->mDateModified)
-        env->SetLongField(info, field_objectInfo_dateModified, objectInfo->mDateModified * 1000LL);
-    if (objectInfo->mKeywords)
-        env->SetObjectField(info, field_objectInfo_keywords,
-            env->NewStringUTF(objectInfo->mKeywords));
-
+    fill_jobject_from_object_info(env, info, objectInfo);
     delete objectInfo;
     return info;
 }
@@ -403,6 +411,82 @@ android_mtp_MtpDevice_import_file_to_fd(JNIEnv *env, jobject thiz, jint object_i
         return JNI_FALSE;
 }
 
+static jboolean
+android_mtp_MtpDevice_send_object(JNIEnv *env, jobject thiz, jint object_id, jint fd)
+{
+    MtpDevice* device = get_device_from_object(env, thiz);
+    if (!device)
+        return JNI_FALSE;
+    MtpObjectInfo* object_info = device->getObjectInfo(object_id);
+    if (!object_info)
+        return JNI_FALSE;
+
+    bool result = device->sendObject(object_info, fd);
+    delete object_info;
+    return result;
+}
+
+static jobject
+android_mtp_MtpDevice_send_object_info(JNIEnv *env, jobject thiz, jobject info)
+{
+    MtpDevice* device = get_device_from_object(env, thiz);
+    if (!device)
+        return JNI_FALSE;
+
+    // Updating existing objects is not supported.
+    if (env->GetIntField(info, field_objectInfo_handle) != -1)
+        return JNI_FALSE;
+
+    MtpObjectInfo* object_info = new MtpObjectInfo(-1);
+    object_info->mStorageID = env->GetIntField(info, field_objectInfo_storageId);
+    object_info->mFormat = env->GetIntField(info, field_objectInfo_format);
+    object_info->mProtectionStatus = env->GetIntField(info, field_objectInfo_protectionStatus);
+    object_info->mCompressedSize = env->GetIntField(info, field_objectInfo_compressedSize);
+    object_info->mThumbFormat = env->GetIntField(info, field_objectInfo_thumbFormat);
+    object_info->mThumbCompressedSize =
+            env->GetIntField(info, field_objectInfo_thumbCompressedSize);
+    object_info->mThumbPixWidth = env->GetIntField(info, field_objectInfo_thumbPixWidth);
+    object_info->mThumbPixHeight = env->GetIntField(info, field_objectInfo_thumbPixHeight);
+    object_info->mImagePixWidth = env->GetIntField(info, field_objectInfo_imagePixWidth);
+    object_info->mImagePixHeight = env->GetIntField(info, field_objectInfo_imagePixHeight);
+    object_info->mImagePixDepth = env->GetIntField(info, field_objectInfo_imagePixDepth);
+    object_info->mParent = env->GetIntField(info, field_objectInfo_parent);
+    object_info->mAssociationType = env->GetIntField(info, field_objectInfo_associationType);
+    object_info->mAssociationDesc = env->GetIntField(info, field_objectInfo_associationDesc);
+    object_info->mSequenceNumber = env->GetIntField(info, field_objectInfo_sequenceNumber);
+
+    jstring name_jstring = (jstring) env->GetObjectField(info, field_objectInfo_name);
+    const char* name_string = env->GetStringUTFChars(name_jstring, NULL);
+    object_info->mName = strdup(name_string);
+    env->ReleaseStringUTFChars(name_jstring, name_string);
+
+    object_info->mDateCreated = env->GetLongField(info, field_objectInfo_dateCreated) / 1000LL;
+    object_info->mDateModified = env->GetLongField(info, field_objectInfo_dateModified) / 1000LL;
+
+    jstring keywords_jstring = (jstring) env->GetObjectField(info, field_objectInfo_keywords);
+    const char* keywords_string = env->GetStringUTFChars(keywords_jstring, NULL);
+    object_info->mKeywords = strdup(keywords_string);
+    env->ReleaseStringUTFChars(keywords_jstring, keywords_string);
+
+    int object_handle = device->sendObjectInfo(object_info);
+    if (object_handle == -1) {
+        delete object_info;
+        return NULL;
+    }
+
+    object_info->mHandle = object_handle;
+    jobject result = env->NewObject(clazz_objectInfo, constructor_objectInfo);
+    if (result == NULL) {
+        ALOGE("Could not create a MtpObjectInfo object");
+        delete object_info;
+        return NULL;
+    }
+
+    fill_jobject_from_object_info(env, result, object_info);
+    delete object_info;
+    return result;
+}
+
 // ----------------------------------------------------------------------------
 
 static JNINativeMethod gMethods[] = {
@@ -425,7 +509,10 @@ static JNINativeMethod gMethods[] = {
     {"native_get_storage_id",   "(I)J", (void *)android_mtp_MtpDevice_get_storage_id},
     {"native_import_file",      "(ILjava/lang/String;)Z",
                                         (void *)android_mtp_MtpDevice_import_file},
-    {"native_import_file",      "(II)Z", (void *)android_mtp_MtpDevice_import_file_to_fd}
+    {"native_import_file",      "(II)Z",(void *)android_mtp_MtpDevice_import_file_to_fd},
+    {"native_send_object",      "(II)Z",(void *)android_mtp_MtpDevice_send_object},
+    {"native_send_object_info", "(Landroid/mtp/MtpObjectInfo;)Landroid/mtp/MtpObjectInfo;",
+                                        (void *)android_mtp_MtpDevice_send_object_info}
 };
 
 int register_android_mtp_MtpDevice(JNIEnv *env)