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cmDspBuiltIn.c:Rewrote _cmDspAudioFileOutExec().

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This commit is contained in:
kevin 2013-03-01 17:35:35 -08:00
parent 4463d9bbe3
commit b467c7abd4
1 changed files with 25 additions and 26 deletions
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51
dsp/cmDspBuiltIn.c
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@ -1298,47 +1298,44 @@ cmDspRC_t _cmDspAudioFileOutReset(cmDspCtx_t* ctx, cmDspInst_t* inst, const cmDs
return rc;
}
cmDspRC_t _cmDspAudioFileOutExec(cmDspCtx_t* ctx, cmDspInst_t* inst, const cmDspEvt_t* evt )
{
cmDspRC_t rc = kOkDspRC;
cmDspAudioFileOut_t* p = (cmDspAudioFileOut_t*)inst;;
unsigned fpc = cmDspSamplesPerCycle(ctx);
unsigned chCnt = cmDspUInt(inst,kChCntAofId);
unsigned chCnt = cmMin(2,cmDspUInt(inst,kChCntAofId));
unsigned smpCnt = 0;
cmSample_t* chArray[chCnt];
unsigned i;
unsigned i,j;
// Assume that both channls have the same number of samples.
// (cmAudioWriteFile() has the same constraint )
int sn = cmDspAudioBufSmpCount(ctx,inst,kIn0AofId,0);
// This code can handle the case where the input channels contain
// more than or less than cmDspSamplesPerCycle().
while(sn>0)
for(i=0,j=0; i<chCnt; ++i)
{
// we can process at most 'fpc' samples on one iteration
unsigned n = cmMin(sn,fpc);
sn -= n;
unsigned chVarId = i == 0 ? kIn0AofId : kIn1AofId; // get audio buf var id for this ch
unsigned iSmpCnt = cmDspVarRows(inst,chVarId);
// apply output gain
for(i=0; i<chCnt; ++i)
if( iSmpCnt == 0 )
{
chArray[i] = p->smpBuf + i*fpc;
const cmSample_t* sp = i==0 ? cmDspAudioBuf(ctx,inst,kIn0AofId,0) : cmDspAudioBuf(ctx,inst,kIn1AofId,0);
cmSample_t gain = i==0 ? cmDspDouble(inst,kGain0AofId) : cmDspDouble(inst,kGain1AofId);
chArray[j] = NULL;
}
else
{
cmSample_t gain = cmDspSample(inst,i==0?kGain0AofId:kGain1AofId); // get ch gain
chArray[j] = cmDspAudioBuf(ctx,inst,chVarId,i); // get incoming audio buf ptr
cmVOS_MultVVS(chArray[i], n, sp, (cmSample_t)gain);
if( gain != 1.0 )
cmVOS_MultVVS(chArray[j], iSmpCnt, chArray[j], gain); // apply gain
++j; // incr chArray[] index
assert( smpCnt==0 || iSmpCnt==smpCnt);
smpCnt = iSmpCnt; // set outgoing sample count
}
// write the samples
if( cmAudioFileWriteSample(p->afH, n, chCnt, chArray ) != kOkAfRC )
rc = cmDspClassErr(ctx,inst->classPtr,kFileWriteFailDspRC,"An audio output file write failed.");
}
// write the samples
if( cmAudioFileWriteSample(p->afH, smpCnt, j, chArray ) != kOkAfRC )
rc = cmDspClassErr(ctx,inst->classPtr,kFileWriteFailDspRC,"An audio output file write failed.");
return rc;
}
@ -5020,6 +5017,8 @@ cmDspClassConsFunc_t _cmDspClassBuiltInArray[] =
cmMidiFilePlayClassCons,
cmScFolClassCons,
cmScModClassCons,
cmGSwitchClassCons,
NULL,
};