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libcamera: pipeline: uvcvideo: Fix ExposureTimeMode control setting

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The mapping in `UVCCameraData::processControl()` is not entirely correct
because the control value is retrieved as a `bool` instead of `int32_t`.
Additionally, the available modes are not taken into account.

Retrieve the control value with the right type, `int32_t`, check if the
requested mode is available, and if so, set the appropriate V4L2 control
value selected by `addControl()` earlier.

Fixes: bad8d591f8 ("libcamera: uvcvideo: Register ExposureTimeMode control")
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
This commit is contained in:
Barnabás Pőcze
2025-04-01 16:13:00 +02:00
parent 799982b646
commit 8b2533d0ac
1 changed files with 20 additions and 9 deletions
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src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
+20 -9
View File
@@ -98,8 +98,8 @@ public:
bool match(DeviceEnumerator *enumerator) override;
private:
int processControl(ControlList *controls, unsigned int id,
const ControlValue &value);
int processControl(const UVCCameraData *data, ControlList *controls,
unsigned int id, const ControlValue &value);
int processControls(UVCCameraData *data, Request *request);
bool acquireDevice(Camera *camera) override;
@@ -312,8 +312,8 @@ void PipelineHandlerUVC::stopDevice(Camera *camera)
data->video_->releaseBuffers();
}
int PipelineHandlerUVC::processControl(ControlList *controls, unsigned int id,
const ControlValue &value)
int PipelineHandlerUVC::processControl(const UVCCameraData *data, ControlList *controls,
unsigned int id, const ControlValue &value)
{
uint32_t cid;
@@ -357,10 +357,21 @@ int PipelineHandlerUVC::processControl(ControlList *controls, unsigned int id,
}
case V4L2_CID_EXPOSURE_AUTO: {
int32_t ivalue = value.get<bool>()
? V4L2_EXPOSURE_APERTURE_PRIORITY
: V4L2_EXPOSURE_MANUAL;
controls->set(V4L2_CID_EXPOSURE_AUTO, ivalue);
std::optional<v4l2_exposure_auto_type> mode;
switch (value.get<int32_t>()) {
case controls::ExposureTimeModeAuto:
mode = data->autoExposureMode_;
break;
case controls::ExposureTimeModeManual:
mode = data->manualExposureMode_;
break;
}
if (!mode)
return -EINVAL;
controls->set(V4L2_CID_EXPOSURE_AUTO, static_cast<int32_t>(*mode));
break;
}
@@ -398,7 +409,7 @@ int PipelineHandlerUVC::processControls(UVCCameraData *data, Request *request)
ControlList controls(data->video_->controls());
for (const auto &[id, value] : request->controls())
processControl(&controls, id, value);
processControl(data, &controls, id, value);
for (const auto &ctrl : controls)
LOG(UVC, Debug)