rfc2190hlpr.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: rfc2190hlpr.cpp,v 1.1.1.1.42.1 2004/07/09 01:56:41 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (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.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * 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;
- }