hxrsmp2.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 
 *  
 * 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 ***** */ 

#ifndef _HXRSMP2_H_
#define _HXRSMP2_H_

#include "growingq.h"
#include "hxcomm.h"
#include "RAResampler.h"

typedef enum _AudioChannelConversion
{
    AUDIO_CHANNEL_NONE,
    AUDIO_CHANNEL_UP,
    AUDIO_CHANNEL_DOWN
} AudioChannelConversion;

typedef enum _AudioSampleConversion
{
    AUDIO_SAMPLE_NONE,
    AUDIO_SAMPLE_NEEDED    
} AudioSampleConversion;

class HXCDQualityResampler : public IHXAudioResampler
{
protected:
    LONG32		    m_lRefCount;
    RAExactResampler*	    m_pResampler;
    AudioChannelConversion  m_audioChannelConversion;
    AudioSampleConversion   m_audioSampleConversion;
    HXAudioFormat	    m_inAudioFormat;
    HXAudioFormat	    m_outAudioFormat;

    UINT32		    m_ulSamplesSaved;
    UINT32		    m_ulSamplesFixed;
    UINT32		    m_ulBytesFixed;
    short*		    m_pBPS8To16Out;

    void    Downmix16(INT16* pIn, UINT32 nSamplesIn);
    void    BPS8To16(INT16* pIn, UINT32 ulBytesIn, INT16* pOut, UINT32& ulBytesOut);
    void    Close(void);
    void    CopyAudioFormat(HXAudioFormat from, REF(HXAudioFormat) to);

public:

    HXCDQualityResampler();
    ~HXCDQualityResampler();

    /*
     * IUnknown methods
     */
    STDMETHOD(QueryInterface)	(THIS_
				REFIID riid,
				void** ppvObj);

    STDMETHOD_(ULONG32,AddRef)	(THIS);

    STDMETHOD_(ULONG32,Release)	(THIS);


    /*
     *  IHXResampler methods
     */

    /*
     *  IHXResampler methods
     */

    /**********************************************************************
     *  Method:
     *      IHXAudioResampler::Resample
     *  Purpose:
     *  Will produce 1 output frame for every (upFactor/downFactor) inputs
     *  frames, straddling if not an integer.  Works down to 1 sample/call.
     * 
     *  Returns actual number of output frames.
     ***********************************************************************/

    STDMETHOD_(UINT32, Resample)    (   THIS_
                                        UINT16*	pInput, 
                                        UINT32	ulInputBytes, 
                                        UINT16*	pOutput);

    /**********************************************************************
     *  Method:
     *      IHXAudioResampler::Requires
     *  Purpose:
     *  Returns number of input frames required to produce this number
     *  of output frames, given the current state of the filter.
     */

    STDMETHOD_(UINT32, Requires)    (   THIS_
                                        UINT32 ulOutputFrames);

    HX_RESULT	Init(HXAudioFormat	    inAudioFormat,
		     REF(HXAudioFormat)    outAudioFormat);
};

#endif //_HXRSMP2_H_