MtpPacket.h revision 335dd2be955607f2632eabc25045857f2cc8b674 
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_endpoint;
23
24namespace android {
25
26class MtpStringBuffer;
27
28class MtpPacket {
29
30protected:
31    uint8_t*            mBuffer;
32    // current size of the buffer
33    int                 mBufferSize;
34    // number of bytes to add when resizing the buffer
35    int                 mAllocationIncrement;
36    // size of the data in the packet
37    int                 mPacketSize;
38
39public:
40                        MtpPacket(int bufferSize);
41    virtual             ~MtpPacket();
42
43    // sets packet size to the default container size and sets buffer to zero
44    virtual void        reset();
45
46    void                allocate(int length);
47    void                dump();
48
49    uint16_t            getContainerCode() const;
50    void                setContainerCode(uint16_t code);
51
52    MtpTransactionID    getTransactionID() const;
53    void                setTransactionID(MtpTransactionID id);
54
55    uint32_t            getParameter(int index) const;
56    void                setParameter(int index, uint32_t value);
57
58#ifdef MTP_HOST
59    int                 transfer(struct usb_endpoint *ep, void* buffer, int length);
60#endif
61
62protected:
63    uint16_t            getUInt16(int offset) const;
64    uint32_t            getUInt32(int offset) const;
65    void                putUInt16(int offset, uint16_t value);
66    void                putUInt32(int offset, uint32_t value);
67};
68
69}; // namespace android
70
71#endif // _MTP_PACKET_H
72