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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is MPEG4IP.
*
* The Initial Developer of the Original Code is Cisco Systems Inc.
* Portions created by Cisco Systems Inc. are
* Copyright (C) Cisco Systems Inc. 2001-2002. All Rights Reserved.
*
* Contributor(s):
* Dave Mackie dmackie@cisco.com
*/
#ifndef __MBS_INCLUDED__
#define __MBS_INCLUDED__
class CMemoryBitstream {
public:
CMemoryBitstream() {
m_pBuf = NULL;
m_bitPos = 0;
m_numBits = 0;
}
void AllocBytes(u_int32_t numBytes);
void SetBytes(u_int8_t* pBytes, u_int32_t numBytes);
void PutBytes(u_int8_t* pBytes, u_int32_t numBytes);
void PutBits(u_int32_t bits, u_int32_t numBits);
u_int32_t GetBits(u_int32_t numBits);
void SkipBytes(u_int32_t numBytes) {
SkipBits(numBytes << 3);
}
void SkipBits(u_int32_t numBits) {
SetBitPosition(GetBitPosition() + numBits);
}
u_int32_t GetBitPosition() {
return m_bitPos;
}
void SetBitPosition(u_int32_t bitPos) {
if (bitPos > m_numBits) {
throw;
}
m_bitPos = bitPos;
}
u_int8_t* GetBuffer() {
return m_pBuf;
}
u_int32_t GetNumberOfBytes() {
return (GetNumberOfBits() + 7) / 8;
}
u_int32_t GetNumberOfBits() {
return m_numBits;
}
protected:
u_int8_t* m_pBuf;
u_int32_t m_bitPos;
u_int32_t m_numBits;
};
#endif /* __MBS_INCLUDED__ */
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