MTP FFS updates:
This update splits old MTP code and new MTP code from Google
into two trees, legacy and ffs. Depending on the SDK level,
the build system will select the correct version. The reason
for separating the versions out are due to older android trees
not supporting the updated MTP code from Google.
Most MTP code is from Google, with additions needed from
implementing the Java functions in C++ for TWRP and FFS.
We assume if you are in android-9.0 or above, your kernel
has support for FFS over MTP. Verify that your init.rc
is mounting the MTP FFS driver to the proper location.
Change-Id: I4b107b239bd9bc5699527f9c8c77d9079f264a7e
diff --git a/mtp/ffs/MtpPacket.h b/mtp/ffs/MtpPacket.h
new file mode 100644
index 0000000..b757091
--- /dev/null
+++ b/mtp/ffs/MtpPacket.h
@@ -0,0 +1,74 @@
+/*
+ * 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_PACKET_H
+#define _MTP_PACKET_H
+
+#include <android-base/macros.h>
+
+#include "MtpDebug.h"
+#include "MtpTypes.h"
+
+struct usb_device;
+struct usb_request;
+
+class MtpPacket {
+
+protected:
+ uint8_t* mBuffer;
+ // current size of the buffer
+ size_t mBufferSize;
+ // number of bytes to add when resizing the buffer
+ size_t mAllocationIncrement;
+ // size of the data in the packet
+ size_t mPacketSize;
+
+public:
+ explicit MtpPacket(int bufferSize);
+ virtual ~MtpPacket();
+
+ // sets packet size to the default container size and sets buffer to zero
+ virtual void reset();
+
+ void allocate(size_t length);
+ void dump();
+ void copyFrom(const MtpPacket& src);
+
+ uint16_t getContainerCode() const;
+ void setContainerCode(uint16_t code);
+
+ uint16_t getContainerType() const;
+
+ MtpTransactionID getTransactionID() const;
+ void setTransactionID(MtpTransactionID id);
+
+ uint32_t getParameter(int index) const;
+ void setParameter(int index, uint32_t value);
+
+#ifdef MTP_HOST
+ int transfer(struct usb_request* request);
+#endif
+
+protected:
+ uint16_t getUInt16(int offset) const;
+ uint32_t getUInt32(int offset) const;
+ void putUInt16(int offset, uint16_t value);
+ void putUInt32(int offset, uint32_t value);
+
+ DISALLOW_COPY_AND_ASSIGN(MtpPacket);
+};
+
+#endif // _MTP_PACKET_H