Checkpoint work on MTP and PTP investigation.

This change includes work in progress on a C++ library for both host and device
MTP and PTP support.
Currently the makefile builds two test programs:

mtptest - a command line test program that implements a small subset of device side MTP.
Requires a kernel driver that has not been checked in yet.

ptptest - a host tool to test USB host support for detecting and communicating with
digital cameras over PTP.  Runs on Linux host.

Later this will be reformulated as a native library that will be used in the media process.

Change-Id: I81aab279975b600b59d99013ab97f9adf0b58da7
Signed-off-by: Mike Lockwood <lockwood@android.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/media/mtp/MtpStringBuffer.h b/media/mtp/MtpStringBuffer.h
new file mode 100644
index 0000000..46138d2
--- /dev/null
+++ b/media/mtp/MtpStringBuffer.h
@@ -0,0 +1,50 @@
+/*
+ * 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_STRING_BUFFER_H
+#define _MTP_STRING_BUFFER_H
+
+#include <stdint.h>
+
+class MtpDataPacket;
+
+// Represents a utf8 string, with a maximum of 255 characters
+class MtpStringBuffer {
+
+private:
+    // maximum 3 bytes/character, with 1 extra for zero termination
+    uint8_t         mBuffer[255 * 3 + 1];
+    int             mCharCount;
+    int             mByteCount;
+
+public:
+                    MtpStringBuffer();
+                    MtpStringBuffer(const char* src);
+                    MtpStringBuffer(const MtpStringBuffer& src);
+    virtual         ~MtpStringBuffer();
+
+    void            set(const char* src);
+
+    void            readFromPacket(MtpDataPacket* packet);
+    void            writeToPacket(MtpDataPacket* packet) const;
+
+    inline int      getCharCount() const { return mCharCount; }
+    inline int      getByteCount() const { return mByteCount; }
+
+	inline operator const char*() const { return (const char *)mBuffer; }
+};
+
+#endif // _MTP_STRING_BUFFER_H