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Adding the ability to toggle autofocus on/off for DirectShow webcams

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This commit is contained in:
Adam Rankin 2018-06-14 18:24:14 -04:00
parent 06c1890639
commit ecf4b639e1
1 changed files with 19 additions and 0 deletions
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19
modules/videoio/src/cap_dshow.cpp
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@ -3220,6 +3220,11 @@ double VideoCapture_DShow::getProperty(int propIdx) const
return g_VI.getFourcc(m_index); return g_VI.getFourcc(m_index);
case CV_CAP_PROP_FPS: case CV_CAP_PROP_FPS:
return g_VI.getFPS(m_index); return g_VI.getFPS(m_index);
case CV_CAP_PROP_AUTOFOCUS:
// Flags indicate whether or not autofocus is enabled
if (g_VI.getVideoSettingCamera(m_index, CameraControl_Focus, min_value, max_value, stepping_delta, current_value, flags, defaultValue))
return (double)flags;
return -1;
// video filter properties // video filter properties
case CV_CAP_PROP_BRIGHTNESS: case CV_CAP_PROP_BRIGHTNESS:
@ -3284,6 +3289,7 @@ bool VideoCapture_DShow::setProperty(int propIdx, double propVal)
break; break;
case CV_CAP_PROP_FPS: case CV_CAP_PROP_FPS:
{
int fps = cvRound(propVal); int fps = cvRound(propVal);
if (fps != g_VI.getFPS(m_index)) if (fps != g_VI.getFPS(m_index))
{ {
@ -3297,6 +3303,19 @@ bool VideoCapture_DShow::setProperty(int propIdx, double propVal)
return g_VI.isDeviceSetup(m_index); return g_VI.isDeviceSetup(m_index);
} }
case CV_CAP_PROP_AUTOFOCUS:
{
// Flags are required to toggle autofocus or not, but the setProperty interface does not support multiple parameters
bool enabled = cvRound(propVal) == 1;
long minFocus, maxFocus, delta, currentFocus, flags, defaultValue;
if (!g_VI.getVideoSettingCamera(m_index, CameraControl_Focus, minFocus, maxFocus, delta, currentFocus, flags, defaultValue))
{
return false;
}
return g_VI.setVideoSettingCamera(m_index, CameraControl_Focus, currentFocus, enabled ? CameraControl_Flags_Auto | CameraControl_Flags_Manual : CameraControl_Flags_Manual, enabled ? true : false);
}
}
if (handled) if (handled)
{ {
// a stream setting // a stream setting