protected HVSTATUS SetExposureTime(int nWindWidth, int nUpper, int nLower, int nHBlanking,
HV_SNAP_SPEED SnapSpeed, HV_RESOLUTION Resolution)
{
double clockFreq = 0.0;
int tB = nHBlanking;
int outPut = nWindWidth;
double exposure = 0.0;
Debug.Assert(nLower != 0);
double temp = (double)nUpper / (double)nLower;
double tInt = (temp > m_kZeorInDouble) ? temp : m_kZeorInDouble;
if (IsGV400())
{
tB += 0x5e;
clockFreq = (SnapSpeed == HV_SNAP_SPEED.HIGH_SPEED) ? 26600000.0 : 13300000.0;
int rate = 0;
switch (Resolution)
{
case HV_RESOLUTION.RES_MODE0:
rate = 1;
break;
case HV_RESOLUTION.RES_MODE1:
rate = 2;
break;
default:
return(HVSTATUS.STATUS_PARAMETER_OUT_OF_BOUND);
}
outPut = outPut * rate;
if ((tInt * clockFreq) <= (outPut + tB - 255))
{
exposure = 1;
}
else
{
Debug.Assert((outPut + tB) != 0);
exposure = ((tInt * clockFreq) - (outPut + tB - 255)) / (outPut + tB);
}
if (exposure < 3)
{
exposure = 3;
}
else if (exposure > 32766)
{
exposure = 32766;
}
}
else if (IsHV300())
{
clockFreq = (SnapSpeed == HV_SNAP_SPEED.HIGH_SPEED) ? 24000000 : 12000000;
tB += 142;
if (tB < 21)
{
tB = 21;
}
int param1 = 331;
int param2 = 38;
int param3 = 316;
if (Resolution == HV_RESOLUTION.RES_MODE1)
{
param1 = 673;
param2 = 22;
param3 = 316 * 2;
}
int AQ = outPut + param1 + param2 + tB;
int tmp = param1 + param3;
int trow = (AQ > tmp) ? AQ : tmp;
Debug.Assert(trow != 0);
exposure = ((tInt * clockFreq) + param1 - 132.0) / trow;
if ((exposure - (int)exposure) > 0.5)
{
exposure += 1.0;
}
if (exposure <= 0)
{
exposure = 1;
}
else if (exposure > 1048575)
{
exposure = 1048575;
}
}
else if (IsHV200())
{
clockFreq = (SnapSpeed == HV_SNAP_SPEED.HIGH_SPEED) ? 24000000 : 12000000;
tB += 53;
if (tB < 19)
{
tB = 19;
}
int AQ = outPut + 305 + tB;
int trow = (617 > AQ) ? 617 : AQ;
Debug.Assert((trow + 1) != 0);
exposure = (tInt * clockFreq + 180.0) / trow + 1;
if ((exposure - (int)exposure) > 0.5)
{
exposure += 1.0;
}
if (exposure <= 0)
{
exposure = 1;
}
else if (exposure > 16383)
{
exposure = 16383;
}
}
else if (IsHV5051())
{
SHUTTER_UNIT_VALUE unit = SHUTTER_UNIT_VALUE.SHUTTER_MS;
if (nLower == 1000000)
{
unit = SHUTTER_UNIT_VALUE.SHUTTER_US;
}
//设置曝光时间单位
HVSTATUS status = USBCameraAPI.HVAECControl(m_pHandle, (byte)HV_AEC_CONTROL.AEC_SHUTTER_UNIT, (int)unit);
if (!USBCameraAPI.HV_SUCCESS(status))
{
return(status);
}
//设置曝光时间
return(USBCameraAPI.HVAECControl(m_pHandle, (byte)HV_AEC_CONTROL.AEC_SHUTTER_SPEED, nUpper));
}
else
{
clockFreq = (SnapSpeed == HV_SNAP_SPEED.HIGH_SPEED) ? 24000000 : 12000000;
tB += 9;
tB -= 19;
if (tB <= 0)
{
tB = 0;
}
if ((outPut + 244.0 + tB) > 552)
{
exposure = (tInt * clockFreq + 180.0) / ((double)outPut + 244.0 + tB);
}
else
{
exposure = ((tInt * clockFreq) + 180.0) / 552;
}
if ((exposure - (int)exposure) > 0.5)
{
exposure += 1.0;
}
if (exposure <= 0)
{
exposure = 1;
}
else if (exposure > 16383)
{
exposure = 16383;
}
}
return(USBCameraAPI.HVAECControl(m_pHandle, (byte)HV_AEC_CONTROL.AEC_EXPOSURE_TIME, (int)exposure));
}