MtpPacket.h revision 16864bae0f51c32c456da2c43adf7a057c0c4882 
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
20class MtpStringBuffer;
21
22#include "mtp.h"
23#include "MtpUtils.h"
24
25#include <stdint.h>
26
27class MtpPacket {
28
29protected:
30    uint8_t*            mBuffer;
31    // current size of the buffer
32    int                 mBufferSize;
33    // number of bytes to add when resizing the buffer
34    int                 mAllocationIncrement;
35    // size of the data in the packet
36    int                 mPacketSize;
37
38public:
39                        MtpPacket(int bufferSize);
40    virtual             ~MtpPacket();
41
42    // sets packet size to the default container size and sets buffer to zero
43    virtual void        reset();
44
45    void                allocate(int length);
46    void                dump();
47
48    uint16_t            getContainerCode() const;
49    void                setContainerCode(uint16_t code);
50
51    MtpTransactionID    getTransactionID() const;
52    void                setTransactionID(MtpTransactionID id);
53
54    uint32_t            getParameter(int index) const;
55    void                setParameter(int index, uint32_t value);
56
57#ifdef MTP_HOST
58    int                 transfer(struct usb_endpoint *ep, void* buffer, int length);
59#endif
60
61protected:
62    uint16_t            getUInt16(int offset) const;
63    uint32_t            getUInt32(int offset) const;
64    void                putUInt16(int offset, uint16_t value);
65    void                putUInt32(int offset, uint32_t value);
66};
67
68#endif // _MTP_PACKET_H
69