Prototype Content Provider support for MTP/PTP devices.

At this point much of the plumbing is in place, but only a few simple queries
are supported.
This is enough to support a proof of concept sample program that navigates
the file hierarchy of a digital camera connected via USB.

Also removed obsolete ptptest host test program.

Change-Id: I17644344b9f0ce1ecc302bc0478c1f3d44a1647f
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/media/mtp/MtpCursor.h b/media/mtp/MtpCursor.h
new file mode 100644
index 0000000..422f0c9
--- /dev/null
+++ b/media/mtp/MtpCursor.h
@@ -0,0 +1,75 @@
+/*
+ * 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.
+ */
+
+#ifndef _MTP_CURSOR_H
+#define _MTP_CURSOR_H
+
+#include "MtpTypes.h"
+
+namespace android {
+
+class CursorWindow;
+
+class MtpCursor {
+private:
+    enum {
+        DEVICE              = 1,
+        DEVICE_ID           = 2,
+        STORAGE             = 3,
+        STORAGE_ID          = 4,
+        OBJECT              = 5,
+        OBJECT_ID           = 6,
+        STORAGE_CHILDREN    = 7,
+        OBJECT_CHILDREN     = 8,
+    };
+
+    MtpClient*  mClient;
+    int         mQueryType;
+    int         mDeviceID;
+    int         mStorageID;
+    int         mQbjectID;
+    int         mColumnCount;
+    int*        mColumns;
+
+public:
+                MtpCursor(MtpClient* client, int queryType, int deviceID,
+                        int storageID, int objectID, int columnCount, int* columns);
+    virtual     ~MtpCursor();
+
+    int         fillWindow(CursorWindow* window, int startPos);
+
+private:
+    int         fillDevices(CursorWindow* window, int startPos);
+    int         fillDevice(CursorWindow* window, int startPos);
+    int         fillStorages(CursorWindow* window, int startPos);
+    int         fillStorage(CursorWindow* window, int startPos);
+    int         fillObjects(CursorWindow* window, int parent, int startPos);
+    int         fillObject(CursorWindow* window, int startPos);
+
+    bool        fillDevice(CursorWindow* window, MtpDevice* device, int startPos);
+    bool        fillStorage(CursorWindow* window, MtpDevice* device,
+                        MtpStorageID storageID, int row);
+    bool        fillObject(CursorWindow* window, MtpDevice* device,
+                        MtpObjectHandle objectID, int row);
+
+    bool        prepareRow(CursorWindow* window);
+    bool        putLong(CursorWindow* window, int value, int row, int column);
+    bool        putString(CursorWindow* window, const char* text, int row, int column);
+};
+
+}; // namespace android
+
+#endif // _MTP_CURSOR_H