amr_frame_info.h

来自「symbian 下的helix player源代码」· C头文件 代码 · 共 81 行

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * 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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 * 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 
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 * This file is part of the Helix DNA Technology. RealNetworks is the 
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 * ***** END LICENSE BLOCK ***** */ 

#ifndef AMR_FRAME_INFO_H
#define AMR_FRAME_INFO_H

#include "hxtypes.h"
#include "amr_flavor.h"

class CAMRFrameInfo
{
public:
    static ULONG32 FrameBits(AMRFlavor flavor, ULONG32 frameType);
    static ULONG32 MaxFrameBits(AMRFlavor flavor);

    static ULONG32 FrameDuration(); // duration in ms    

    static BOOL    FindFrameBegin(AMRFlavor eFlavor,
                                  BYTE* pBuf, UINT32 ulLen,
                                  UINT32 ulMinFrames,
                                  UINT32& rulFrameBegin);
    static BOOL    TestForConsecutiveFrames(AMRFlavor eFlavor,
                                            BYTE* pBuf, UINT32 ulLen,
                                            UINT32 ulMinFrames);
private:
    static const ULONG32 zm_frameBits[2][16];
    static const ULONG32 zm_maxFrameBits[2];
    static const ULONG32 zm_frameDuration;
};

inline
ULONG32 CAMRFrameInfo::FrameBits(AMRFlavor flavor, ULONG32 frameType)
{
    return zm_frameBits[flavor][frameType];
}

inline
ULONG32 CAMRFrameInfo::MaxFrameBits(AMRFlavor flavor)
{
    return zm_maxFrameBits[flavor];
}

inline
ULONG32 CAMRFrameInfo::FrameDuration()
{
    return zm_frameDuration;
}
#endif // AMR_FRAME_INFO_H