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cmDspKr.h/c: Added 'ScaleRange' DSP class.

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This commit is contained in:
kevin 2013-04-20 10:37:20 -07:00
parent f4448e99b6
commit 14f163394d
2 changed files with 102 additions and 0 deletions
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101
dsp/cmDspKr.c
View File

@ -1515,3 +1515,104 @@ struct cmDspClass_str* cmGSwitchClassCons( cmDspCtx_t* ctx )
return &_cmGSwitchDC;
}
//==========================================================================================================================================
enum
{
kMinInSrId,
kMaxInSrId,
kMinOutSrId,
kMaxOutSrId,
kValInSrId,
kValOutSrId,
};
cmDspClass_t _cmScaleRangeDC;
typedef struct
{
cmDspInst_t inst;
} cmDspScaleRange_t;
cmDspInst_t* _cmDspScaleRangeAlloc(cmDspCtx_t* ctx, cmDspClass_t* classPtr, unsigned storeSymId, unsigned instSymId, unsigned id, unsigned va_cnt, va_list vl )
{
va_list vl1;
va_copy(vl1,vl);
cmDspVarArg_t args[] =
{
{ "min_in", kMinInSrId, 0,0, kInDsvFl | kDoubleDsvFl , "Min Input value."},
{ "max_in", kMaxInSrId, 0,0, kInDsvFl | kDoubleDsvFl , "Min Input value."},
{ "min_out", kMinOutSrId, 0,0, kInDsvFl | kDoubleDsvFl , "Min Input value."},
{ "max_out", kMaxOutSrId, 0,0, kInDsvFl | kDoubleDsvFl , "Min Input value."},
{ "val_in", kValInSrId, 0,0, kInDsvFl | kDoubleDsvFl, "Input value."},
{ "val_out", kValOutSrId, 0,0, kOutDsvFl | kDoubleDsvFl, "Output value"},
{ NULL, 0, 0, 0, 0 }
};
cmDspScaleRange_t* p = cmDspInstAlloc(cmDspScaleRange_t,ctx,classPtr,args,instSymId,id,storeSymId,va_cnt,vl);
cmDspSetDefaultDouble(ctx,&p->inst,kMinInSrId,0,0);
cmDspSetDefaultDouble(ctx,&p->inst,kMaxInSrId,0,1.0);
cmDspSetDefaultDouble(ctx,&p->inst,kMinOutSrId,0,0);
cmDspSetDefaultDouble(ctx,&p->inst,kMaxOutSrId,0,1.0);
return &p->inst;
}
cmDspRC_t _cmDspScaleRangeReset(cmDspCtx_t* ctx, cmDspInst_t* inst, const cmDspEvt_t* evt )
{
cmDspRC_t rc = kOkDspRC;
cmDspApplyAllDefaults(ctx,inst);
return rc;
}
cmDspRC_t _cmDspScaleRangeRecv(cmDspCtx_t* ctx, cmDspInst_t* inst, const cmDspEvt_t* evt )
{
cmDspRC_t rc = kOkDspRC;
cmDspScaleRange_t* p = (cmDspScaleRange_t*)inst;
cmDspSetEvent(ctx,inst,evt);
if( evt->dstVarId == kValInSrId )
{
double val = cmDspDouble(inst,kValInSrId);
double min_in = cmDspDouble(inst,kMinInSrId);
double max_in = cmDspDouble(inst,kMaxInSrId);
double min_out = cmDspDouble(inst,kMinOutSrId);
double max_out = cmDspDouble(inst,kMaxOutSrId);
double x = cmMax(min_in,cmMin(max_in,val));
x = (x - min_in)/(max_in - min_in);
x = min_out + x * (max_out - min_out);
cmDspSetDouble(ctx,inst,kValOutSrId, x );
//printf("%f (%f %f) : (%f %f) %f\n",val,min_in,max_in,min_out,max_out,x);
}
return rc;
}
struct cmDspClass_str* cmScaleRangeClassCons( cmDspCtx_t* ctx )
{
cmDspClassSetup(&_cmScaleRangeDC,ctx,"ScaleRange",
NULL,
_cmDspScaleRangeAlloc,
NULL,
_cmDspScaleRangeReset,
NULL,
_cmDspScaleRangeRecv,
NULL,NULL,
"Scale a value inside an input range to a value in the output range.");
return &_cmScaleRangeDC;
}

1
dsp/cmDspKr.h
View File

@ -12,6 +12,7 @@ extern "C" {
struct cmDspClass_str* cmScFolClassCons( cmDspCtx_t* ctx );
struct cmDspClass_str* cmScModClassCons( cmDspCtx_t* ctx );
struct cmDspClass_str* cmGSwitchClassCons( cmDspCtx_t* ctx );
struct cmDspClass_str* cmScaleRangeClassCons( cmDspCtx_t* ctx );
#ifdef __cplusplus
}