resizeStream.h

Classes:

class
Detailed Description

 1
 2//-----------------------------------------------------------------------------
 3// Copyright (c) 2012 GarageGames, LLC
 4//
 5// Permission is hereby granted, free of charge, to any person obtaining a copy
 6// of this software and associated documentation files (the "Software"), to
 7// deal in the Software without restriction, including without limitation the
 8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 9// sell copies of the Software, and to permit persons to whom the Software is
10// furnished to do so, subject to the following conditions:
11//
12// The above copyright notice and this permission notice shall be included in
13// all copies or substantial portions of the Software.
14//
15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21// IN THE SOFTWARE.
22//-----------------------------------------------------------------------------
23
24#ifndef _RESIZESTREAM_H_
25#define _RESIZESTREAM_H_
26
27//Includes
28#ifndef _PLATFORM_H_
29#include "platform/platform.h"
30#endif
31#ifndef _FILTERSTREAM_H_
32#include "core/filterStream.h"
33#endif
34
35class ResizeFilterStream : public FilterStream, public IStreamByteCount
36{
37   typedef FilterStream Parent;
38
39   Stream* m_pStream;
40   U32     m_startOffset;
41   U32     m_streamLen;
42   U32     m_currOffset;
43   U32 m_lastBytesRead;
44
45  public:
46   ResizeFilterStream();
47   ~ResizeFilterStream();
48
49   bool    attachStream(Stream* io_pSlaveStream);
50   void    detachStream();
51   Stream* getStream();
52
53   bool setStreamOffset(const U32 in_startOffset,
54                        const U32 in_streamLen);
55
56   // Mandatory overrides.
57  protected:
58   bool _read(const U32 in_numBytes,  void* out_pBuffer);
59  public:
60   U32  getPosition() const;
61   bool setPosition(const U32 in_newPosition);
62
63   U32  getStreamSize();
64
65   // IStreamByteCount
66   U32 getLastBytesRead() { return m_lastBytesRead; }
67   U32 getLastBytesWritten() { return 0; }
68};
69
70#endif //_RESIZESTREAM_H_
71