MtpPacket.h revision ab063847e6e893740749029a04cce1f6b7345ed5 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _MTP_PACKET_H
18#define _MTP_PACKET_H
19
20#include "MtpTypes.h"
21
22struct usb_request;
23
24namespace android {
25
26class MtpPacket {
27
28protected:
29    uint8_t*            mBuffer;
30    // current size of the buffer
31    size_t              mBufferSize;
32    // number of bytes to add when resizing the buffer
33    size_t              mAllocationIncrement;
34    // size of the data in the packet
35    size_t              mPacketSize;
36
37public:
38                        MtpPacket(int bufferSize);
39    virtual             ~MtpPacket();
40
41    // sets packet size to the default container size and sets buffer to zero
42    virtual void        reset();
43
44    void                allocate(size_t length);
45    void                dump();
46    void                copyFrom(const MtpPacket& src);
47
48    uint16_t            getContainerCode() const;
49    void                setContainerCode(uint16_t code);
50
51    uint16_t            getContainerType() const;
52
53    MtpTransactionID    getTransactionID() const;
54    void                setTransactionID(MtpTransactionID id);
55
56    uint32_t            getParameter(int index) const;
57    void                setParameter(int index, uint32_t value);
58
59#ifdef MTP_HOST
60    int                 transfer(struct usb_request* request);
61#endif
62
63protected:
64    uint16_t            getUInt16(int offset) const;
65    uint32_t            getUInt32(int offset) const;
66    void                putUInt16(int offset, uint16_t value);
67    void                putUInt32(int offset, uint32_t value);
68};
69
70}; // namespace android
71
72#endif // _MTP_PACKET_H
73