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# BitStream.h

    00001 /*
    00002  *      Copyright (C) 2003-2005 Gabest
    00003  *      http://www.gabest.org
    00004  *
    00005  *  This Program is free software; you can redistribute it and/or modify
    00006  *  it under the terms of the GNU General Public License as published by
    00007  *  the Free Software Foundation; either version 2, or (at your option)
    00008  *  any later version.
    00009  *
    00010  *  This Program is distributed in the hope that it will be useful,
    00011  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
    00012  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    00013  *  GNU General Public License for more details.
    00014  *
    00015  *  You should have received a copy of the GNU General Public License
    00016  *  along with GNU Make; see the file COPYING.  If not, write to
    00017  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
    00018  *  http://www.gnu.org/copyleft/gpl.html
    00019  *
    00020  */
    00021
    00022 #pragma once
    00023
    00024 [uuid("30AB78C7-5259-4594-AEFE-9C0FC2F08A5E")]
    00025 interface IBitStream : public IUnknown
    00026 {
    00027         STDMETHOD_(UINT64, GetPos) () = 0;
    00028         STDMETHOD_(UINT64, Seek) (UINT64 pos) = 0; // it's a _stream_, please don't seek if you don't have to
    00029         STDMETHOD(ByteWrite) (const void* pData, int len) = 0;
    00030         STDMETHOD(BitWrite) (UINT64 data, int len) = 0;
    00031         STDMETHOD(BitFlush) () = 0;
    00032 };
    00033
    00034 class CBitStream : public CUnknown, public IBitStream
    00035 {
    00036         CComPtr<IStream> m_pStream;
    00037         bool m_fThrowError;
    00038         UINT64 m_bitbuff;
    00039         int m_bitlen;
    00040
    00041 public:
    00042         CBitStream(IStream* pStream, bool m_fThrowError = false);
    00043         virtual ~CBitStream();
    00044
    00045         DECLARE_IUNKNOWN;
    00046     STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void** ppv);
    00047
    00048         // IBitStream
    00049
    00050         STDMETHODIMP_(UINT64) GetPos();
    00051         STDMETHODIMP_(UINT64) Seek(UINT64 pos);
    00052         STDMETHODIMP ByteWrite(const void* pData, int len);
    00053         STDMETHODIMP BitWrite(UINT64 data, int len);
    00054         STDMETHODIMP BitFlush();
    00055 };