rafixptresampler.cpp

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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 * 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 
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 * This file is part of the Helix DNA Technology. RealNetworks is the 
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#include "RAResampler.h"

// Create a resampler with a given quality level.
HX_RESULT 
RAExactResampler::Create(RAExactResampler** pRes, int inrate, int outrate,
			 int chans, int intype, Quality quality)
{
    *pRes = NULL;

    HX_ASSERT(intype == _INT16);
    if (intype == _INT16)
    {
	if ((*pRes = new RAExactResampler()) != NULL)
	{
	    (*pRes)->m_pInst = InitResampler(inrate, outrate, chans, (int)quality);
	}
    }

    return ((*pRes && (*pRes)->m_pInst) ? HXR_OK : HXR_FAIL);
}


RAExactResampler::RAExactResampler()
    : m_pInst(NULL)
{}


RAExactResampler::~RAExactResampler()
{
    if (m_pInst)
	FreeResampler(m_pInst);
}


int
RAExactResampler::GetMaxOutput(int insamps)
{
    HX_ASSERT(m_pInst);
    return ::GetMaxOutput(insamps, m_pInst);
}


int
RAExactResampler::GetMinInput(int outsamps)
{
    HX_ASSERT(m_pInst);
    return ::GetMinInput(outsamps, m_pInst);
}


int
RAExactResampler::GetDelay()
{
    HX_ASSERT(m_pInst);
    return ::GetDelay(m_pInst);
}