640 lines
16 KiB
C++
640 lines
16 KiB
C++
/*
|
|
WDL - resample.cpp
|
|
Copyright (C) 2010 and later Cockos Incorporated
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely, subject to the following restrictions:
|
|
|
|
1. The origin of this software must not be misrepresented; you must not
|
|
claim that you wrote the original software. If you use this software
|
|
in a product, an acknowledgment in the product documentation would be
|
|
appreciated but is not required.
|
|
2. Altered source versions must be plainly marked as such, and must not be
|
|
misrepresented as being the original software.
|
|
3. This notice may not be removed or altered from any source distribution.
|
|
|
|
You may also distribute this software under the LGPL v2 or later.
|
|
|
|
*/
|
|
|
|
#include "resample.h"
|
|
#include <math.h>
|
|
|
|
#include "denormal.h"
|
|
|
|
#ifndef PI
|
|
#define PI 3.1415926535897932384626433832795
|
|
#endif
|
|
|
|
class WDL_Resampler::WDL_Resampler_IIRFilter
|
|
{
|
|
public:
|
|
WDL_Resampler_IIRFilter()
|
|
{
|
|
m_fpos=-1;
|
|
Reset();
|
|
}
|
|
~WDL_Resampler_IIRFilter()
|
|
{
|
|
}
|
|
|
|
void Reset()
|
|
{
|
|
memset(m_hist,0,sizeof(m_hist));
|
|
}
|
|
|
|
void setParms(double fpos, double Q)
|
|
{
|
|
if (fabs(fpos-m_fpos)<0.000001) return;
|
|
m_fpos=fpos;
|
|
|
|
double pos = fpos * PI;
|
|
double cpos=cos(pos);
|
|
double spos=sin(pos);
|
|
|
|
double alpha=spos/(2.0*Q);
|
|
|
|
double sc=1.0/( 1 + alpha);
|
|
m_b1 = (1-cpos) * sc;
|
|
m_b2 = m_b0 = m_b1*0.5;
|
|
m_a1 = -2 * cpos * sc;
|
|
m_a2 = (1-alpha)*sc;
|
|
|
|
}
|
|
|
|
void Apply(WDL_ResampleSample *in1, WDL_ResampleSample *out1, int ns, int span, int w)
|
|
{
|
|
double b0=m_b0,b1=m_b1,b2=m_b2,a1=m_a1,a2=m_a2;
|
|
double *hist=m_hist[w];
|
|
while (ns--)
|
|
{
|
|
double in=*in1;
|
|
in1+=span;
|
|
double out = (double) ( in*b0 + hist[0]*b1 + hist[1]*b2 - hist[2]*a1 - hist[3]*a2);
|
|
hist[1]=hist[0]; hist[0]=in;
|
|
hist[3]=hist[2]; *out1 = hist[2]=denormal_filter_double(out);
|
|
|
|
out1+=span;
|
|
}
|
|
}
|
|
|
|
private:
|
|
double m_fpos;
|
|
double m_a1,m_a2;
|
|
double m_b0,m_b1,m_b2;
|
|
double m_hist[WDL_RESAMPLE_MAX_FILTERS*WDL_RESAMPLE_MAX_NCH][4];
|
|
};
|
|
|
|
|
|
void inline WDL_Resampler::SincSample(WDL_ResampleSample *outptr, const WDL_ResampleSample *inptr, double fracpos, int nch, const WDL_SincFilterSample *filter, int filtsz)
|
|
{
|
|
const int oversize=m_lp_oversize;
|
|
|
|
fracpos *= oversize;
|
|
const int ifpos=(int)fracpos;
|
|
filter += (oversize-ifpos) * filtsz;
|
|
fracpos -= ifpos;
|
|
|
|
int x;
|
|
for (x = 0; x < nch; x ++)
|
|
{
|
|
double sum=0.0,sum2=0.0;
|
|
const WDL_SincFilterSample *fptr2=filter;
|
|
const WDL_SincFilterSample *fptr=fptr2 - filtsz;
|
|
const WDL_ResampleSample *iptr=inptr+x;
|
|
int i=filtsz/2;
|
|
while (i--)
|
|
{
|
|
sum += fptr[0]*iptr[0];
|
|
sum2 += fptr2[0]*iptr[0];
|
|
sum += fptr[1]*iptr[nch];
|
|
sum2 += fptr2[1]*iptr[nch];
|
|
iptr+=nch*2;
|
|
fptr+=2;
|
|
fptr2+=2;
|
|
}
|
|
outptr[x]=sum*fracpos + sum2*(1.0-fracpos);
|
|
}
|
|
|
|
}
|
|
|
|
void inline WDL_Resampler::SincSample1(WDL_ResampleSample *outptr, const WDL_ResampleSample *inptr, double fracpos, const WDL_SincFilterSample *filter, int filtsz)
|
|
{
|
|
const int oversize=m_lp_oversize;
|
|
fracpos *= oversize;
|
|
const int ifpos=(int)fracpos;
|
|
fracpos -= ifpos;
|
|
|
|
double sum=0.0,sum2=0.0;
|
|
const WDL_SincFilterSample *fptr2=filter + (oversize-ifpos) * filtsz;
|
|
const WDL_SincFilterSample *fptr=fptr2 - filtsz;
|
|
const WDL_ResampleSample *iptr=inptr;
|
|
int i=filtsz/2;
|
|
while (i--)
|
|
{
|
|
sum += fptr[0]*iptr[0];
|
|
sum2 += fptr2[0]*iptr[0];
|
|
sum += fptr[1]*iptr[1];
|
|
sum2 += fptr2[1]*iptr[1];
|
|
iptr+=2;
|
|
fptr+=2;
|
|
fptr2+=2;
|
|
}
|
|
outptr[0]=sum*fracpos+sum2*(1.0-fracpos);
|
|
}
|
|
|
|
void inline WDL_Resampler::SincSample2(WDL_ResampleSample *outptr, const WDL_ResampleSample *inptr, double fracpos, const WDL_SincFilterSample *filter, int filtsz)
|
|
{
|
|
const int oversize=m_lp_oversize;
|
|
fracpos *= oversize;
|
|
const int ifpos=(int)fracpos;
|
|
fracpos -= ifpos;
|
|
|
|
const WDL_SincFilterSample *fptr2=filter + (oversize-ifpos) * filtsz;
|
|
const WDL_SincFilterSample *fptr=fptr2 - filtsz;
|
|
|
|
double sum=0.0;
|
|
double sum2=0.0;
|
|
double sumb=0.0;
|
|
double sum2b=0.0;
|
|
const WDL_ResampleSample *iptr=inptr;
|
|
int i=filtsz/2;
|
|
while (i--)
|
|
{
|
|
sum += fptr[0]*iptr[0];
|
|
sum2 += fptr[0]*iptr[1];
|
|
sumb += fptr2[0]*iptr[0];
|
|
sum2b += fptr2[0]*iptr[1];
|
|
sum += fptr[1]*iptr[2];
|
|
sum2 += fptr[1]*iptr[3];
|
|
sumb += fptr2[1]*iptr[2];
|
|
sum2b += fptr2[1]*iptr[3];
|
|
iptr+=4;
|
|
fptr+=2;
|
|
fptr2+=2;
|
|
}
|
|
outptr[0]=sum*fracpos + sumb*(1.0-fracpos);
|
|
outptr[1]=sum2*fracpos + sum2b*(1.0-fracpos);
|
|
|
|
}
|
|
|
|
|
|
|
|
WDL_Resampler::WDL_Resampler()
|
|
{
|
|
m_filterq=0.707f;
|
|
m_filterpos=0.693f; // .792 ?
|
|
|
|
m_sincoversize=0;
|
|
m_lp_oversize=1;
|
|
m_sincsize=0;
|
|
m_filtercnt=1;
|
|
m_interp=true;
|
|
m_feedmode=false;
|
|
|
|
m_filter_coeffs_size=0;
|
|
m_sratein=44100.0;
|
|
m_srateout=44100.0;
|
|
m_ratio=1.0;
|
|
m_filter_ratio=-1.0;
|
|
m_iirfilter=0;
|
|
|
|
Reset();
|
|
}
|
|
|
|
WDL_Resampler::~WDL_Resampler()
|
|
{
|
|
delete m_iirfilter;
|
|
}
|
|
|
|
void WDL_Resampler::Reset(double fracpos)
|
|
{
|
|
m_last_requested=0;
|
|
m_filtlatency=0;
|
|
m_fracpos=fracpos;
|
|
m_samples_in_rsinbuf=0;
|
|
if (m_iirfilter) m_iirfilter->Reset();
|
|
}
|
|
|
|
void WDL_Resampler::SetMode(bool interp, int filtercnt, bool sinc, int sinc_size, int sinc_interpsize)
|
|
{
|
|
m_sincsize = sinc && sinc_size>= 4 ? sinc_size > 8192 ? 8192 : (sinc_size&~1) : 0;
|
|
m_sincoversize = m_sincsize ? (sinc_interpsize<= 1 ? 1 : sinc_interpsize>=8192 ? 8192 : sinc_interpsize) : 1;
|
|
|
|
m_filtercnt = m_sincsize ? 0 : (filtercnt<=0?0 : filtercnt >= WDL_RESAMPLE_MAX_FILTERS ? WDL_RESAMPLE_MAX_FILTERS : filtercnt);
|
|
m_interp=interp && !m_sincsize;
|
|
// char buf[512];
|
|
// sprintf(buf,"setting interp=%d, filtercnt=%d, sinc=%d,%d\n",m_interp,m_filtercnt,m_sincsize,m_sincoversize);
|
|
// OutputDebugString(buf);
|
|
|
|
if (!m_sincsize)
|
|
{
|
|
m_filter_coeffs.Resize(0);
|
|
m_filter_coeffs_size=0;
|
|
}
|
|
if (!m_filtercnt)
|
|
{
|
|
delete m_iirfilter;
|
|
m_iirfilter=0;
|
|
}
|
|
}
|
|
|
|
void WDL_Resampler::SetRates(double rate_in, double rate_out)
|
|
{
|
|
if (rate_in<1.0) rate_in=1.0;
|
|
if (rate_out<1.0) rate_out=1.0;
|
|
if (rate_in != m_sratein || rate_out != m_srateout)
|
|
{
|
|
m_sratein=rate_in;
|
|
m_srateout=rate_out;
|
|
m_ratio=m_sratein / m_srateout;
|
|
}
|
|
}
|
|
|
|
|
|
void WDL_Resampler::BuildLowPass(double filtpos) // only called in sinc modes
|
|
{
|
|
const int wantsize=m_sincsize;
|
|
const int wantinterp=m_sincoversize;
|
|
|
|
if (m_filter_ratio!=filtpos ||
|
|
m_filter_coeffs_size != wantsize ||
|
|
m_lp_oversize != wantinterp)
|
|
{
|
|
m_lp_oversize = wantinterp;
|
|
m_filter_ratio=filtpos;
|
|
|
|
// build lowpass filter
|
|
const int allocsize = wantsize*(m_lp_oversize+1);
|
|
WDL_SincFilterSample *cfout=m_filter_coeffs.Resize(allocsize);
|
|
if (m_filter_coeffs.GetSize()==allocsize)
|
|
{
|
|
m_filter_coeffs_size=wantsize;
|
|
|
|
const double dwindowpos = 2.0 * PI/(double)wantsize;
|
|
const double dsincpos = PI * filtpos; // filtpos is outrate/inrate, i.e. 0.5 is going to half rate
|
|
const int hwantsize=wantsize/2;
|
|
|
|
double filtpower=0.0;
|
|
WDL_SincFilterSample *ptrout = cfout;
|
|
int slice;
|
|
for (slice=0;slice<=wantinterp;slice++)
|
|
{
|
|
const double frac = slice / (double)wantinterp;
|
|
const int center_x = slice == 0 ? hwantsize : slice == wantinterp ? hwantsize-1 : -1;
|
|
|
|
int x;
|
|
for (x=0;x<wantsize;x++)
|
|
{
|
|
if (x==center_x)
|
|
{
|
|
// we know this will be 1.0
|
|
*ptrout++ = 1.0;
|
|
}
|
|
else
|
|
{
|
|
const double xfrac = frac + x;
|
|
const double windowpos = dwindowpos * xfrac;
|
|
const double sincpos = dsincpos * (xfrac - hwantsize);
|
|
|
|
// blackman-harris * sinc
|
|
const double val = (0.35875 - 0.48829 * cos(windowpos) + 0.14128 * cos(2*windowpos) - 0.01168 * cos(3*windowpos)) * sin(sincpos) / sincpos;
|
|
if (slice<wantinterp) filtpower+=val;
|
|
*ptrout++ = (WDL_SincFilterSample)val;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
filtpower = wantinterp/(filtpower+1.0);
|
|
int x;
|
|
for (x = 0; x < allocsize; x ++)
|
|
{
|
|
cfout[x] = (WDL_SincFilterSample) (cfout[x]*filtpower);
|
|
}
|
|
}
|
|
else m_filter_coeffs_size=0;
|
|
|
|
}
|
|
}
|
|
|
|
double WDL_Resampler::GetCurrentLatency()
|
|
{
|
|
double v=((double)m_samples_in_rsinbuf-m_filtlatency)/m_sratein;
|
|
|
|
if (v<0.0)v=0.0;
|
|
return v;
|
|
}
|
|
|
|
int WDL_Resampler::ResamplePrepare(int out_samples, int nch, WDL_ResampleSample **inbuffer)
|
|
{
|
|
if (nch > WDL_RESAMPLE_MAX_NCH || nch < 1) return 0;
|
|
|
|
int fsize=0;
|
|
if (m_sincsize>1) fsize = m_sincsize;
|
|
|
|
int hfs=fsize/2;
|
|
if (hfs>1 && m_samples_in_rsinbuf<hfs-1)
|
|
{
|
|
m_filtlatency+=hfs-1 - m_samples_in_rsinbuf;
|
|
|
|
m_samples_in_rsinbuf=hfs-1;
|
|
|
|
if (m_samples_in_rsinbuf>0)
|
|
{
|
|
WDL_ResampleSample *p = m_rsinbuf.Resize(m_samples_in_rsinbuf*nch,false);
|
|
memset(p,0,sizeof(WDL_ResampleSample)*m_rsinbuf.GetSize());
|
|
}
|
|
}
|
|
|
|
int sreq = 0;
|
|
|
|
if (!m_feedmode) sreq = (int)(m_ratio * out_samples) + 4 + fsize - m_samples_in_rsinbuf;
|
|
else sreq = out_samples;
|
|
|
|
if (sreq<0)sreq=0;
|
|
|
|
again:
|
|
m_rsinbuf.Resize((m_samples_in_rsinbuf+sreq)*nch,false);
|
|
|
|
int sz = m_rsinbuf.GetSize()/(nch?nch:1) - m_samples_in_rsinbuf;
|
|
if (sz!=sreq)
|
|
{
|
|
if (sreq>4 && !sz)
|
|
{
|
|
sreq/=2;
|
|
goto again; // try again with half the size
|
|
}
|
|
// todo: notify of error?
|
|
sreq=sz;
|
|
}
|
|
|
|
*inbuffer = m_rsinbuf.Get() + m_samples_in_rsinbuf*nch;
|
|
|
|
m_last_requested=sreq;
|
|
return sreq;
|
|
}
|
|
|
|
|
|
|
|
int WDL_Resampler::ResampleOut(WDL_ResampleSample *out, int nsamples_in, int nsamples_out, int nch)
|
|
{
|
|
if (nch > WDL_RESAMPLE_MAX_NCH || nch < 1) return 0;
|
|
|
|
if (m_filtercnt>0)
|
|
{
|
|
if (m_ratio > 1.0 && nsamples_in > 0) // filter input
|
|
{
|
|
if (!m_iirfilter) m_iirfilter = new WDL_Resampler_IIRFilter;
|
|
|
|
int n=m_filtercnt;
|
|
m_iirfilter->setParms((1.0/m_ratio)*m_filterpos,m_filterq);
|
|
|
|
WDL_ResampleSample *buf=(WDL_ResampleSample *)m_rsinbuf.Get() + m_samples_in_rsinbuf*nch;
|
|
int a,x;
|
|
int offs=0;
|
|
for (x=0; x < nch; x ++)
|
|
for (a = 0; a < n; a ++)
|
|
m_iirfilter->Apply(buf+x,buf+x,nsamples_in,nch,offs++);
|
|
}
|
|
}
|
|
|
|
// prevent the caller from corrupting the internal state
|
|
m_samples_in_rsinbuf += nsamples_in < m_last_requested ? nsamples_in : m_last_requested;
|
|
|
|
int rsinbuf_availtemp = m_samples_in_rsinbuf;
|
|
|
|
if (nsamples_in < m_last_requested) // flush out to ensure we can deliver
|
|
{
|
|
int fsize=(m_last_requested-nsamples_in)*2 + m_sincsize*2;
|
|
|
|
int alloc_size=(m_samples_in_rsinbuf+fsize)*nch;
|
|
WDL_ResampleSample *zb=m_rsinbuf.Resize(alloc_size,false);
|
|
if (m_rsinbuf.GetSize()==alloc_size)
|
|
{
|
|
memset(zb+m_samples_in_rsinbuf*nch,0,fsize*nch*sizeof(WDL_ResampleSample));
|
|
rsinbuf_availtemp = m_samples_in_rsinbuf+fsize;
|
|
}
|
|
}
|
|
|
|
int ret=0;
|
|
double srcpos=m_fracpos;
|
|
double drspos = m_ratio;
|
|
WDL_ResampleSample *localin = m_rsinbuf.Get();
|
|
|
|
WDL_ResampleSample *outptr=out;
|
|
|
|
int ns=nsamples_out;
|
|
|
|
int outlatadj=0;
|
|
|
|
if (m_sincsize) // sinc interpolating
|
|
{
|
|
if (m_ratio > 1.0) BuildLowPass(1.0 / (m_ratio*1.03));
|
|
else BuildLowPass(1.0);
|
|
|
|
int filtsz=m_filter_coeffs_size;
|
|
int filtlen = rsinbuf_availtemp - filtsz;
|
|
outlatadj=filtsz/2-1;
|
|
WDL_SincFilterSample *filter=m_filter_coeffs.Get();
|
|
|
|
if (nch == 1)
|
|
{
|
|
while (ns--)
|
|
{
|
|
int ipos = (int)srcpos;
|
|
|
|
if (ipos >= filtlen-1) break; // quit decoding, not enough input samples
|
|
|
|
SincSample1(outptr,localin + ipos,srcpos-ipos,filter,filtsz);
|
|
outptr ++;
|
|
srcpos+=drspos;
|
|
ret++;
|
|
}
|
|
}
|
|
else if (nch==2)
|
|
{
|
|
while (ns--)
|
|
{
|
|
int ipos = (int)srcpos;
|
|
|
|
if (ipos >= filtlen-1) break; // quit decoding, not enough input samples
|
|
|
|
SincSample2(outptr,localin + ipos*2,srcpos-ipos,filter,filtsz);
|
|
outptr+=2;
|
|
srcpos+=drspos;
|
|
ret++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while (ns--)
|
|
{
|
|
int ipos = (int)srcpos;
|
|
|
|
if (ipos >= filtlen-1) break; // quit decoding, not enough input samples
|
|
|
|
SincSample(outptr,localin + ipos*nch,srcpos-ipos,nch,filter,filtsz);
|
|
outptr += nch;
|
|
srcpos+=drspos;
|
|
ret++;
|
|
}
|
|
}
|
|
}
|
|
else if (!m_interp) // point sampling
|
|
{
|
|
if (nch == 1)
|
|
{
|
|
while (ns--)
|
|
{
|
|
int ipos = (int)srcpos;
|
|
if (ipos >= rsinbuf_availtemp) break; // quit decoding, not enough input samples
|
|
|
|
*outptr++ = localin[ipos];
|
|
srcpos+=drspos;
|
|
ret++;
|
|
}
|
|
}
|
|
else if (nch == 2)
|
|
{
|
|
while (ns--)
|
|
{
|
|
int ipos = (int)srcpos;
|
|
if (ipos >= rsinbuf_availtemp) break; // quit decoding, not enough input samples
|
|
|
|
ipos+=ipos;
|
|
|
|
outptr[0] = localin[ipos];
|
|
outptr[1] = localin[ipos+1];
|
|
outptr+=2;
|
|
srcpos+=drspos;
|
|
ret++;
|
|
}
|
|
}
|
|
else
|
|
while (ns--)
|
|
{
|
|
int ipos = (int)srcpos;
|
|
if (ipos >= rsinbuf_availtemp) break; // quit decoding, not enough input samples
|
|
|
|
memcpy(outptr,localin + ipos*nch,nch*sizeof(WDL_ResampleSample));
|
|
outptr += nch;
|
|
srcpos+=drspos;
|
|
ret++;
|
|
}
|
|
}
|
|
else // linear interpolation
|
|
{
|
|
if (nch == 1)
|
|
{
|
|
while (ns--)
|
|
{
|
|
int ipos = (int)srcpos;
|
|
double fracpos=srcpos-ipos;
|
|
|
|
if (ipos >= rsinbuf_availtemp-1)
|
|
{
|
|
break; // quit decoding, not enough input samples
|
|
}
|
|
|
|
double ifracpos=1.0-fracpos;
|
|
WDL_ResampleSample *inptr = localin + ipos;
|
|
*outptr++ = inptr[0]*(ifracpos) + inptr[1]*(fracpos);
|
|
srcpos+=drspos;
|
|
ret++;
|
|
}
|
|
}
|
|
else if (nch == 2)
|
|
{
|
|
while (ns--)
|
|
{
|
|
int ipos = (int)srcpos;
|
|
double fracpos=srcpos-ipos;
|
|
|
|
if (ipos >= rsinbuf_availtemp-1)
|
|
{
|
|
break; // quit decoding, not enough input samples
|
|
}
|
|
|
|
double ifracpos=1.0-fracpos;
|
|
WDL_ResampleSample *inptr = localin + ipos*2;
|
|
outptr[0] = inptr[0]*(ifracpos) + inptr[2]*(fracpos);
|
|
outptr[1] = inptr[1]*(ifracpos) + inptr[3]*(fracpos);
|
|
outptr += 2;
|
|
srcpos+=drspos;
|
|
ret++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while (ns--)
|
|
{
|
|
int ipos = (int)srcpos;
|
|
double fracpos=srcpos-ipos;
|
|
|
|
if (ipos >= rsinbuf_availtemp-1)
|
|
{
|
|
break; // quit decoding, not enough input samples
|
|
}
|
|
|
|
double ifracpos=1.0-fracpos;
|
|
int ch=nch;
|
|
WDL_ResampleSample *inptr = localin + ipos*nch;
|
|
while (ch--)
|
|
{
|
|
*outptr++ = inptr[0]*(ifracpos) + inptr[nch]*(fracpos);
|
|
inptr++;
|
|
}
|
|
srcpos+=drspos;
|
|
ret++;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if (m_filtercnt>0)
|
|
{
|
|
if (m_ratio < 1.0 && ret>0) // filter output
|
|
{
|
|
if (!m_iirfilter) m_iirfilter = new WDL_Resampler_IIRFilter;
|
|
int n=m_filtercnt;
|
|
m_iirfilter->setParms(m_ratio*m_filterpos,m_filterq);
|
|
|
|
int x,a;
|
|
int offs=0;
|
|
for (x=0; x < nch; x ++)
|
|
for (a = 0; a < n; a ++)
|
|
m_iirfilter->Apply(out+x,out+x,ret,nch,offs++);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
if (ret>0 && rsinbuf_availtemp>m_samples_in_rsinbuf) // we had to pad!!
|
|
{
|
|
// check for the case where rsinbuf_availtemp>m_samples_in_rsinbuf, decrease ret down to actual valid samples
|
|
double adj=(srcpos-m_samples_in_rsinbuf + outlatadj) / drspos;
|
|
if (adj>0)
|
|
{
|
|
ret -= (int) (adj + 0.5);
|
|
if (ret<0)ret=0;
|
|
}
|
|
}
|
|
|
|
int isrcpos=(int)srcpos;
|
|
if (isrcpos > m_samples_in_rsinbuf) isrcpos=m_samples_in_rsinbuf;
|
|
m_fracpos = srcpos - isrcpos;
|
|
m_samples_in_rsinbuf -= isrcpos;
|
|
if (m_samples_in_rsinbuf <= 0) m_samples_in_rsinbuf=0;
|
|
else
|
|
memmove(localin, localin + isrcpos*nch,m_samples_in_rsinbuf*sizeof(WDL_ResampleSample)*nch);
|
|
|
|
|
|
return ret;
|
|
}
|