sdpchunk.h

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
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 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
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 * The contents of this file, and the files included with this file, are 
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 * Version 1.0 (the "RPSL") available at 
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 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
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 * 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. 
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 * This file, and the files included with this file, is distributed and made 
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 * ***** END LICENSE BLOCK ***** */ 

#ifndef _SDPCHUNK_H_
#define _SDPCHUNK_H_

/****************************************************************************
 *  Includes
 */
#include "hxcom.h"
#include "hxtypes.h"
#include "hxcomm.h"
#include "ihxpckts.h"

/****************************************************************************
 *  Globals
 */
/****************************************************************************
 *  Types
 */
typedef enum
{
    SDPCTX_Session,
    SDPCTX_Media,
    SDPCTX_Time,
    SDPCTX_Generic,
    SDPCTX_Renderer,
    SDPCTX_Group
} SDPChunkContext;

typedef HX_RESULT (*SDPPullFuncPtr) (char* pData, 
				     ULONG32 ulLength, 
				     IHXValues* pSDPValues,
				     IHXCommonClassFactory* pClassFactory);

struct SDPRecordPuller
{
    char* pSDPMatch;
    ULONG32 ulSDPMatchSize;
    SDPPullFuncPtr pPullFunc;
};


/****************************************************************************
 *  Utilities
 */
HX_RESULT SDPParseChunk(char* pData,
			ULONG32 ulDataLen,
			IHXValues* &pSDPValues,
			IHXCommonClassFactory *pClassFactory,
			SDPChunkContext SDPContext = SDPCTX_Generic,
			BOOL bPullRecords = FALSE);

HX_RESULT SDPParseChunk(char* pData,
			ULONG32 ulDataLen,
			IHXValues* &pSDPValues,
			IHXCommonClassFactory *pClassFactory,
			const SDPRecordPuller* pPullTable,
			BOOL bPullRecords = FALSE);

HX_RESULT SDPMapPayloadToMime(ULONG32 ulPayloadType,
			      IHXBuffer* &pMimeType,
			      IHXCommonClassFactory *pClassFactory);

HX_RESULT SDPMapMimeToPayload(IHXBuffer* pMimeTypeBuffer, ULONG32 &ulPayload);

BOOL SDPIsKnownPayload(ULONG32 ulPayloadType);

BOOL SDPIsFixedRatePayload(ULONG32 ulPayloadType);

ULONG32 SDPMapMimeToSamplesPerSecond(IHXBuffer* pMimeTypeBuffer);

#endif  // _SDPCHUNK_H_