// 画图形单元
void CGraphInstrumentList::DrawUnitAll(CDC* pDC, int iGridX, int iGridY, unsigned int uiTestType, bool bShowCross, bool bShowPower, bool bShowCollect)
{
int iUnitWidth; // 图形单元宽度
int iUnitHight; // 图形单元高度
int iUnitSizeMode; // 图形单元尺寸模式；1-最小；2-正常；3-最大
// 得到图形单元尺寸
GetUnitSize(iGridX, iUnitWidth, iUnitHight, iUnitSizeMode);
POSITION pos = m_oGraphInstrumentMap.GetStartPosition();
CGraphInstrumentData* pGraphInstrumentData = NULL;
unsigned int uiPosIndex; // 仪器位置索引
while(NULL != pos)
{
// 得到一个绘图单元
m_oGraphInstrumentMap.GetNextAssoc(pos, uiPosIndex, pGraphInstrumentData);
if((pGraphInstrumentData->m_pInstrument->m_uiInstrumentType == 1) && (bShowCross == true))
{
pGraphInstrumentData->DrawUnit(pDC, iGridX, iGridY, iUnitWidth, iUnitHight, iUnitSizeMode, uiTestType);
}
else if((pGraphInstrumentData->m_pInstrument->m_uiInstrumentType == 2) && (bShowPower == true))
{
pGraphInstrumentData->DrawUnit(pDC, iGridX, iGridY, iUnitWidth, iUnitHight, iUnitSizeMode, uiTestType);
}
else if((pGraphInstrumentData->m_pInstrument->m_uiInstrumentType == 3) && (bShowCollect == true))
{
pGraphInstrumentData->DrawUnit(pDC, iGridX, iGridY, iUnitWidth, iUnitHight, iUnitSizeMode, uiTestType);
}
}
}
int YsWavFile::GetSignedValue(int atTimeStep,int channel) const
{
const size_t sampleIdx=GetSamplePosition(atTimeStep);
const size_t unitSize=GetUnitSize();
if(sampleIdx+unitSize<=sizeInBytes && 0<=channel && channel<GetNumChannel())
{
int rawSignedValue=0;
size_t offset=sampleIdx+channel*BytePerSample();
switch(BitPerSample())
{
case 8:
if(YSTRUE==isSigned)
{
rawSignedValue=dat[offset];
if(128<=rawSignedValue)
{
rawSignedValue-=256;
}
}
else
{
rawSignedValue=dat[offset]-128;
}
break;
case 16:
// Assume little endian
rawSignedValue=dat[offset]+256*dat[offset+1];
if(YSTRUE==isSigned)
{
if(32768<=rawSignedValue)
{
rawSignedValue-=65536;
}
}
else
{
rawSignedValue-=32768;
}
break;
}
return rawSignedValue;
}
return 0;
}
