BitStream.h

/* 
 *      Copyright (C) 2003-2005 Gabest
 *      http://www.gabest.org
 *
 *  This Program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *   
 *  This Program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *   
 *  You should have received a copy of the GNU General Public License
 *  along with GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

#pragma once

[uuid("30AB78C7-5259-4594-AEFE-9C0FC2F08A5E")]
interface IBitStream : public IUnknown
{
        STDMETHOD_(UINT64, GetPos) () = 0;
        STDMETHOD_(UINT64, Seek) (UINT64 pos) = 0; // it's a _stream_, please don't seek if you don't have to 
        STDMETHOD(ByteWrite) (const void* pData, int len) = 0;
        STDMETHOD(BitWrite) (UINT64 data, int len) = 0;
        STDMETHOD(BitFlush) () = 0;
};

class CBitStream : public CUnknown, public IBitStream
{
        CComPtr<IStream> m_pStream;
        bool m_fThrowError;
        UINT64 m_bitbuff;
        int m_bitlen;

public:
        CBitStream(IStream* pStream, bool m_fThrowError = false);
        virtual ~CBitStream();

        DECLARE_IUNKNOWN;
    STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void** ppv);

        // IBitStream

        STDMETHODIMP_(UINT64) GetPos();
        STDMETHODIMP_(UINT64) Seek(UINT64 pos);
        STDMETHODIMP ByteWrite(const void* pData, int len);
        STDMETHODIMP BitWrite(UINT64 data, int len);
        STDMETHODIMP BitFlush();
};

---