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/MtpProperty.h b/mtp/ffs/MtpProperty.h
new file mode 100644
index 0000000..43ec7c3
--- /dev/null
+++ b/mtp/ffs/MtpProperty.h
@@ -0,0 +1,115 @@
+/*
+ * 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_PROPERTY_H
+#define _MTP_PROPERTY_H
+
+#include "MtpTypes.h"
+
+#include <string>
+
+class MtpDataPacket;
+
+struct MtpPropertyValue {
+ union {
+ int8_t i8;
+ uint8_t u8;
+ int16_t i16;
+ uint16_t u16;
+ int32_t i32;
+ uint32_t u32;
+ int64_t i64;
+ uint64_t u64;
+ int128_t i128;
+ uint128_t u128;
+ } u;
+ // string in UTF8 format
+ char* str;
+};
+
+class MtpProperty {
+public:
+ MtpPropertyCode mCode;
+ MtpDataType mType;
+ bool mWriteable;
+ MtpPropertyValue mDefaultValue;
+ MtpPropertyValue mCurrentValue;
+
+ // for array types
+ uint32_t mDefaultArrayLength;
+ MtpPropertyValue* mDefaultArrayValues;
+ uint32_t mCurrentArrayLength;
+ MtpPropertyValue* mCurrentArrayValues;
+
+ enum {
+ kFormNone = 0,
+ kFormRange = 1,
+ kFormEnum = 2,
+ kFormDateTime = 3,
+ };
+
+ uint32_t mGroupCode;
+ uint8_t mFormFlag;
+
+ // for range form
+ MtpPropertyValue mMinimumValue;
+ MtpPropertyValue mMaximumValue;
+ MtpPropertyValue mStepSize;
+
+ // for enum form
+ uint16_t mEnumLength;
+ MtpPropertyValue* mEnumValues;
+
+public:
+ MtpProperty();
+ MtpProperty(MtpPropertyCode propCode,
+ MtpDataType type,
+ bool writeable = false,
+ int defaultValue = 0);
+ virtual ~MtpProperty();
+
+ MtpPropertyCode getPropertyCode() const { return mCode; }
+ MtpDataType getDataType() const { return mType; }
+
+ bool read(MtpDataPacket& packet);
+ void write(MtpDataPacket& packet);
+
+ void setDefaultValue(const uint16_t* string);
+ void setCurrentValue(const uint16_t* string);
+ void setCurrentValue(MtpDataPacket& packet);
+ const MtpPropertyValue& getCurrentValue() { return mCurrentValue; }
+
+ void setFormRange(int min, int max, int step);
+ void setFormEnum(const int* values, int count);
+ void setFormDateTime();
+
+ void print();
+
+ inline bool isDeviceProperty() const {
+ return ( ((mCode & 0xF000) == 0x5000)
+ || ((mCode & 0xF800) == 0xD000));
+ }
+
+private:
+ bool readValue(MtpDataPacket& packet, MtpPropertyValue& value);
+ void writeValue(MtpDataPacket& packet, MtpPropertyValue& value);
+ MtpPropertyValue* readArrayValues(MtpDataPacket& packet, uint32_t& length);
+ void writeArrayValues(MtpDataPacket& packet,
+ MtpPropertyValue* values, uint32_t length);
+ void print(MtpPropertyValue& value, std::string& buffer);
+};
+
+#endif // _MTP_PROPERTY_H