1 files changed, 136 insertions, 0 deletions
diff --git a/media/jni/android_media_MtpCursor.cpp b/media/jni/android_media_MtpCursor.cpp
new file mode 100644
index 0000000..6228b5d
--- /dev/null
+++ b/media/jni/android_media_MtpCursor.cpp
@@ -0,0 +1,136 @@
+/*
+ * 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 "MtpCursorJNI"
+#include "utils/Log.h"
+
+#include <stdio.h>
+#include <assert.h>
+#include <limits.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "jni.h"
+#include "JNIHelp.h"
+#include "android_runtime/AndroidRuntime.h"
+#include "binder/CursorWindow.h"
+
+#include "MtpClient.h"
+#include "MtpCursor.h"
+
+using namespace android;
+
+// ----------------------------------------------------------------------------
+
+static jfieldID field_context;
+
+// From android_media_MtpClient.cpp
+MtpClient * get_client_from_object(JNIEnv * env, jobject javaClient);
+
+// ----------------------------------------------------------------------------
+
+static bool ExceptionCheck(void* env)
+{
+    return ((JNIEnv *)env)->ExceptionCheck();
+}
+
+static void
+android_media_MtpCursor_setup(JNIEnv *env, jobject thiz, jobject javaClient,
+        jint queryType, jint deviceID, jint storageID, jint objectID, jintArray javaColumns)
+{
+#ifdef HAVE_ANDROID_OS
+    LOGD("android_media_MtpCursor_setup queryType: %d deviceID: %d storageID: %d objectID: %d\n",
+                queryType, deviceID, storageID, objectID);
+
+    int* columns = NULL;
+    int columnCount = 0;
+    if (javaColumns) {
+        columns = env->GetIntArrayElements(javaColumns, 0);
+        columnCount = env->GetArrayLength(javaColumns);
+    }
+
+    MtpClient* client = get_client_from_object(env, javaClient);
+    MtpCursor* cursor = new MtpCursor(client, queryType,
+            deviceID, storageID, objectID, columnCount, columns);
+
+    if (columns)
+        env->ReleaseIntArrayElements(javaColumns, columns, 0);
+    env->SetIntField(thiz, field_context, (int)cursor);
+#endif
+}
+
+static void
+android_media_MtpCursor_finalize(JNIEnv *env, jobject thiz)
+{
+#ifdef HAVE_ANDROID_OS
+    LOGD("finalize\n");
+    MtpCursor *cursor = (MtpCursor *)env->GetIntField(thiz, field_context);
+    delete cursor;
+#endif
+}
+
+static jint
+android_media_MtpCursor_fill_window(JNIEnv *env, jobject thiz, jobject javaWindow, jint startPos)
+{
+#ifdef HAVE_ANDROID_OS
+    CursorWindow* window = get_window_from_object(env, javaWindow);
+    if (!window) {
+        LOGE("Invalid CursorWindow");
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "Bad CursorWindow");
+        return 0;
+    }
+    MtpCursor *cursor = (MtpCursor *)env->GetIntField(thiz, field_context);
+
+    return cursor->fillWindow(window, startPos);
+#else
+    return 0;
+#endif
+}
+
+// ----------------------------------------------------------------------------
+
+static JNINativeMethod gMethods[] = {
+    {"native_setup",            "(Landroid/media/MtpClient;IIII[I)V",
+                                        (void *)android_media_MtpCursor_setup},
+    {"native_finalize",         "()V",  (void *)android_media_MtpCursor_finalize},
+    {"native_fill_window",      "(Landroid/database/CursorWindow;I)I",
+                                        (void *)android_media_MtpCursor_fill_window},
+
+};
+
+static const char* const kClassPathName = "android/media/MtpCursor";
+
+int register_android_media_MtpCursor(JNIEnv *env)
+{
+    jclass clazz;
+
+    LOGD("register_android_media_MtpCursor\n");
+
+    clazz = env->FindClass("android/media/MtpCursor");
+    if (clazz == NULL) {
+        LOGE("Can't find android/media/MtpCursor");
+        return -1;
+    }
+    field_context = env->GetFieldID(clazz, "mNativeContext", "I");
+    if (field_context == NULL) {
+        LOGE("Can't find MtpCursor.mNativeContext");
+        return -1;
+    }
+
+    return AndroidRuntime::registerNativeMethods(env,
+                "android/media/MtpCursor", gMethods, NELEM(gMethods));
+}