rfc2190hlpr.cpp
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "./rfc2190hlpr.h"
- #include "bitpack.h"
- CRFC2190Helper::CRFC2190Helper() :
- m_bPictureStart(FALSE),
- m_ulDataSize(0),
- m_pPayload(0),
- m_ulStartOffset(0)
- {}
- CRFC2190Helper::~CRFC2190Helper()
- {}
-
- HX_RESULT CRFC2190Helper::OnPacket(const UINT8* pBuf, ULONG32 ulBufSize)
- {
- HX_RESULT res = HXR_FAILED;
- m_bPictureStart = FALSE;
- m_ulDataSize = 0;
- m_pPayload = 0;
- m_ulStartOffset = 0;
- if (ulBufSize > 12)
- {
- m_ulStartOffset = ((ULONG32)(pBuf[0] >> 3)) & 0x7; // SBIT
- ULONG32 ulEBIT = (ULONG32)pBuf[0] & 0x7;
- if (pBuf[0] & 0x80) // Check F bit
- if (pBuf[0] & 0x40) // Check P bit
- {
- if (((pBuf[3] & 0x3) == 0) && // Check all the reserved bits
- (pBuf[8] == 0) &&
- (pBuf[9] == 0) &&
- ((pBuf[10] & 0xE0) == 0))
- {
- // This is a Mode C packet (Section 5.3)
- m_pPayload = pBuf + 12;
- res = HXR_OK;
- }
- }
- else
- {
- if ((pBuf[3] & 0x3) == 0) // Check for reserved bits
- {
- // This is a Mode B packet (Section 5.2)
- m_pPayload = pBuf + 8;
- res = HXR_OK;
- }
- }
- else if (((pBuf[1] & 0x1) == 0) && // Check for reserved bits
- ((pBuf[2] & 0xe) == 0))
- {
- // This is a Mode A packet (Section 5.1)
- m_pPayload = pBuf + 4;
- if ((pBuf[4] == 0x00) && // Check for PSC
- (pBuf[5] == 0x00) &&
- ((pBuf[6] & 0xfc) == 0x80))
- m_bPictureStart = TRUE;
- }
- if (SUCCEEDED(res))
- m_ulDataSize = ((ulBufSize - (m_pPayload - pBuf) ) * 8 -
- (m_ulStartOffset + ulEBIT));
- }
- return res;
- }
- BOOL CRFC2190Helper::IsPictureStart() const
- {
- return m_bPictureStart;
- }
- ULONG32 CRFC2190Helper::DataSize() const // in bits
- {
- return m_ulDataSize;
- }
- HX_RESULT CRFC2190Helper::CopyPayload(BitPacker& bp)
- {
- HX_RESULT res = HXR_FAILED;
- bp.PackBits(m_pPayload, m_ulDataSize, m_ulStartOffset);
- return res;
- }