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-rw-r--r--src/ipa/raspberrypi/cam_helper.cpp48
-rw-r--r--src/ipa/raspberrypi/cam_helper.h7
-rw-r--r--src/ipa/raspberrypi/cam_helper_imx477.cpp24
-rw-r--r--src/ipa/raspberrypi/cam_helper_imx519.cpp24
-rw-r--r--src/ipa/raspberrypi/raspberrypi.cpp43
5 files changed, 95 insertions, 51 deletions
diff --git a/src/ipa/raspberrypi/cam_helper.cpp b/src/ipa/raspberrypi/cam_helper.cpp
index bc3f66a5..afbc03d3 100644
--- a/src/ipa/raspberrypi/cam_helper.cpp
+++ b/src/ipa/raspberrypi/cam_helper.cpp
@@ -7,6 +7,7 @@
#include <linux/videodev2.h>
+#include <limits>
#include <map>
#include <string.h>
@@ -70,31 +71,56 @@ Duration CamHelper::exposure(uint32_t exposureLines, const Duration lineLength)
return exposureLines * lineLength;
}
-uint32_t CamHelper::getVBlanking(Duration &exposure,
- Duration minFrameDuration,
- Duration maxFrameDuration) const
+std::pair<uint32_t, uint32_t> CamHelper::getBlanking(Duration &exposure,
+ Duration minFrameDuration,
+ Duration maxFrameDuration) const
{
- uint32_t frameLengthMin, frameLengthMax, vblank;
- uint32_t exposureLines = CamHelper::exposureLines(exposure, mode_.minLineLength);
+ uint32_t frameLengthMin, frameLengthMax, vblank, hblank;
+ Duration lineLength = mode_.minLineLength;
/*
* minFrameDuration and maxFrameDuration are clamped by the caller
* based on the limits for the active sensor mode.
+ *
+ * frameLengthMax gets calculated on the smallest line length as we do
+ * not want to extend that unless absolutely necessary.
*/
frameLengthMin = minFrameDuration / mode_.minLineLength;
frameLengthMax = maxFrameDuration / mode_.minLineLength;
/*
+ * Watch out for (exposureLines + frameIntegrationDiff_) overflowing a
+ * uint32_t in the std::clamp() below when the exposure time is
+ * extremely (extremely!) long - as happens when the IPA calculates the
+ * maximum possible exposure time.
+ */
+ uint32_t exposureLines = std::min(CamHelper::exposureLines(exposure, lineLength),
+ std::numeric_limits<uint32_t>::max() - frameIntegrationDiff_);
+ uint32_t frameLengthLines = std::clamp(exposureLines + frameIntegrationDiff_,
+ frameLengthMin, frameLengthMax);
+
+ /*
+ * If our frame length lines is above the maximum allowed, see if we can
+ * extend the line length to accommodate the requested frame length.
+ */
+ if (frameLengthLines > mode_.maxFrameLength) {
+ Duration lineLengthAdjusted = lineLength * frameLengthLines / mode_.maxFrameLength;
+ lineLength = std::min(mode_.maxLineLength, lineLengthAdjusted);
+ frameLengthLines = mode_.maxFrameLength;
+ }
+
+ hblank = lineLengthToHblank(lineLength);
+ vblank = frameLengthLines - mode_.height;
+
+ /*
* Limit the exposure to the maximum frame duration requested, and
* re-calculate if it has been clipped.
*/
- exposureLines = std::min(frameLengthMax - frameIntegrationDiff_, exposureLines);
- exposure = CamHelper::exposure(exposureLines, mode_.minLineLength);
+ exposureLines = std::min(frameLengthLines - frameIntegrationDiff_,
+ CamHelper::exposureLines(exposure, lineLength));
+ exposure = CamHelper::exposure(exposureLines, lineLength);
- /* Limit the vblank to the range allowed by the frame length limits. */
- vblank = std::clamp(exposureLines + frameIntegrationDiff_,
- frameLengthMin, frameLengthMax) - mode_.height;
- return vblank;
+ return { vblank, hblank };
}
Duration CamHelper::hblankToLineLength(uint32_t hblank) const
diff --git a/src/ipa/raspberrypi/cam_helper.h b/src/ipa/raspberrypi/cam_helper.h
index 6cd1dd39..b3f8c980 100644
--- a/src/ipa/raspberrypi/cam_helper.h
+++ b/src/ipa/raspberrypi/cam_helper.h
@@ -8,6 +8,7 @@
#include <memory>
#include <string>
+#include <utility>
#include <libcamera/base/span.h>
#include <libcamera/base/utils.h>
@@ -82,9 +83,9 @@ public:
const libcamera::utils::Duration lineLength) const;
virtual libcamera::utils::Duration exposure(uint32_t exposureLines,
const libcamera::utils::Duration lineLength) const;
- virtual uint32_t getVBlanking(libcamera::utils::Duration &exposure,
- libcamera::utils::Duration minFrameDuration,
- libcamera::utils::Duration maxFrameDuration) const;
+ virtual std::pair<uint32_t, uint32_t> getBlanking(libcamera::utils::Duration &exposure,
+ libcamera::utils::Duration minFrameDuration,
+ libcamera::utils::Duration maxFrameDuration) const;
libcamera::utils::Duration hblankToLineLength(uint32_t hblank) const;
uint32_t lineLengthToHblank(const libcamera::utils::Duration &duration) const;
libcamera::utils::Duration lineLengthPckToDuration(uint32_t lineLengthPck) const;
diff --git a/src/ipa/raspberrypi/cam_helper_imx477.cpp b/src/ipa/raspberrypi/cam_helper_imx477.cpp
index 76a82cc5..19a5e471 100644
--- a/src/ipa/raspberrypi/cam_helper_imx477.cpp
+++ b/src/ipa/raspberrypi/cam_helper_imx477.cpp
@@ -46,8 +46,8 @@ public:
uint32_t gainCode(double gain) const override;
double gain(uint32_t gainCode) const override;
void prepare(libcamera::Span<const uint8_t> buffer, Metadata &metadata) override;
- uint32_t getVBlanking(Duration &exposure, Duration minFrameDuration,
- Duration maxFrameDuration) const override;
+ std::pair<uint32_t, uint32_t> getBlanking(Duration &exposure, Duration minFrameDuration,
+ Duration maxFrameDuration) const override;
void getDelays(int &exposureDelay, int &gainDelay,
int &vblankDelay, int &hblankDelay) const override;
bool sensorEmbeddedDataPresent() const override;
@@ -118,15 +118,19 @@ void CamHelperImx477::prepare(libcamera::Span<const uint8_t> buffer, Metadata &m
}
}
-uint32_t CamHelperImx477::getVBlanking(Duration &exposure,
- Duration minFrameDuration,
- Duration maxFrameDuration) const
+std::pair<uint32_t, uint32_t> CamHelperImx477::getBlanking(Duration &exposure,
+ Duration minFrameDuration,
+ Duration maxFrameDuration) const
{
uint32_t frameLength, exposureLines;
unsigned int shift = 0;
- frameLength = mode_.height + CamHelper::getVBlanking(exposure, minFrameDuration,
- maxFrameDuration);
+ auto [vblank, hblank] = CamHelper::getBlanking(exposure, minFrameDuration,
+ maxFrameDuration);
+
+ frameLength = mode_.height + vblank;
+ Duration lineLength = hblankToLineLength(hblank);
+
/*
* Check if the frame length calculated needs to be setup for long
* exposure mode. This will require us to use a long exposure scale
@@ -144,12 +148,12 @@ uint32_t CamHelperImx477::getVBlanking(Duration &exposure,
if (shift) {
/* Account for any rounding in the scaled frame length value. */
frameLength <<= shift;
- exposureLines = CamHelperImx477::exposureLines(exposure, mode_.minLineLength);
+ exposureLines = CamHelperImx477::exposureLines(exposure, lineLength);
exposureLines = std::min(exposureLines, frameLength - frameIntegrationDiff);
- exposure = CamHelperImx477::exposure(exposureLines, mode_.minLineLength);
+ exposure = CamHelperImx477::exposure(exposureLines, lineLength);
}
- return frameLength - mode_.height;
+ return { frameLength - mode_.height, hblank };
}
void CamHelperImx477::getDelays(int &exposureDelay, int &gainDelay,
diff --git a/src/ipa/raspberrypi/cam_helper_imx519.cpp b/src/ipa/raspberrypi/cam_helper_imx519.cpp
index 9dff1eeb..d2eb1719 100644
--- a/src/ipa/raspberrypi/cam_helper_imx519.cpp
+++ b/src/ipa/raspberrypi/cam_helper_imx519.cpp
@@ -46,8 +46,8 @@ public:
uint32_t gainCode(double gain) const override;
double gain(uint32_t gainCode) const override;
void prepare(libcamera::Span<const uint8_t> buffer, Metadata &metadata) override;
- uint32_t getVBlanking(Duration &exposure, Duration minFrameDuration,
- Duration maxFrameDuration) const override;
+ std::pair<uint32_t, uint32_t> getBlanking(Duration &exposure, Duration minFrameDuration,
+ Duration maxFrameDuration) const override;
void getDelays(int &exposureDelay, int &gainDelay,
int &vblankDelay, int &hblankDelay) const override;
bool sensorEmbeddedDataPresent() const override;
@@ -118,15 +118,19 @@ void CamHelperImx519::prepare(libcamera::Span<const uint8_t> buffer, Metadata &m
}
}
-uint32_t CamHelperImx519::getVBlanking(Duration &exposure,
- Duration minFrameDuration,
- Duration maxFrameDuration) const
+std::pair<uint32_t, uint32_t> CamHelperImx519::getBlanking(Duration &exposure,
+ Duration minFrameDuration,
+ Duration maxFrameDuration) const
{
uint32_t frameLength, exposureLines;
unsigned int shift = 0;
- frameLength = mode_.height + CamHelper::getVBlanking(exposure, minFrameDuration,
- maxFrameDuration);
+ auto [vblank, hblank] = CamHelper::getBlanking(exposure, minFrameDuration,
+ maxFrameDuration);
+
+ frameLength = mode_.height + vblank;
+ Duration lineLength = hblankToLineLength(hblank);
+
/*
* Check if the frame length calculated needs to be setup for long
* exposure mode. This will require us to use a long exposure scale
@@ -144,12 +148,12 @@ uint32_t CamHelperImx519::getVBlanking(Duration &exposure,
if (shift) {
/* Account for any rounding in the scaled frame length value. */
frameLength <<= shift;
- exposureLines = CamHelperImx519::exposureLines(exposure, mode_.minLineLength);
+ exposureLines = CamHelperImx519::exposureLines(exposure, lineLength);
exposureLines = std::min(exposureLines, frameLength - frameIntegrationDiff);
- exposure = CamHelperImx519::exposure(exposureLines, mode_.minLineLength);
+ exposure = CamHelperImx519::exposure(exposureLines, lineLength);
}
- return frameLength - mode_.height;
+ return { frameLength - mode_.height, hblank };
}
void CamHelperImx519::getDelays(int &exposureDelay, int &gainDelay,
diff --git a/src/ipa/raspberrypi/raspberrypi.cpp b/src/ipa/raspberrypi/raspberrypi.cpp
index 5976db05..b74f1ecf 100644
--- a/src/ipa/raspberrypi/raspberrypi.cpp
+++ b/src/ipa/raspberrypi/raspberrypi.cpp
@@ -315,7 +315,7 @@ void IPARPi::start(const ControlList &controls, StartConfig *startConfig)
}
startConfig->dropFrameCount = dropFrameCount_;
- const Duration maxSensorFrameDuration = mode_.maxFrameLength * mode_.minLineLength;
+ const Duration maxSensorFrameDuration = mode_.maxFrameLength * mode_.maxLineLength;
startConfig->maxSensorFrameLengthMs = maxSensorFrameDuration.get<std::milli>();
firstStart_ = false;
@@ -462,7 +462,7 @@ int IPARPi::configure(const IPACameraSensorInfo &sensorInfo,
*/
ControlInfoMap::Map ctrlMap = ipaControls;
const Duration minSensorFrameDuration = mode_.minFrameLength * mode_.minLineLength;
- const Duration maxSensorFrameDuration = mode_.maxFrameLength * mode_.minLineLength;
+ const Duration maxSensorFrameDuration = mode_.maxFrameLength * mode_.maxLineLength;
ctrlMap[&controls::FrameDurationLimits] =
ControlInfo(static_cast<int64_t>(minSensorFrameDuration.get<std::micro>()),
static_cast<int64_t>(maxSensorFrameDuration.get<std::micro>()));
@@ -475,7 +475,7 @@ int IPARPi::configure(const IPACameraSensorInfo &sensorInfo,
* will limit the maximum control value based on the current VBLANK value.
*/
Duration maxShutter = Duration::max();
- helper_->getVBlanking(maxShutter, minSensorFrameDuration, maxSensorFrameDuration);
+ helper_->getBlanking(maxShutter, minSensorFrameDuration, maxSensorFrameDuration);
const uint32_t exposureMin = sensorCtrls_.at(V4L2_CID_EXPOSURE).min().get<int32_t>();
ctrlMap[&controls::ExposureTime] =
@@ -552,7 +552,7 @@ void IPARPi::reportMetadata()
deviceStatus->shutterSpeed.get<std::micro>());
libcameraMetadata_.set(controls::AnalogueGain, deviceStatus->analogueGain);
libcameraMetadata_.set(controls::FrameDuration,
- helper_->exposure(deviceStatus->frameLength, mode_.minLineLength).get<std::micro>());
+ helper_->exposure(deviceStatus->frameLength, deviceStatus->lineLength).get<std::micro>());
if (deviceStatus->sensorTemperature)
libcameraMetadata_.set(controls::SensorTemperature, *deviceStatus->sensorTemperature);
}
@@ -1110,7 +1110,7 @@ void IPARPi::fillDeviceStatus(const ControlList &sensorControls)
int32_t hblank = sensorControls.get(V4L2_CID_HBLANK).get<int32_t>();
deviceStatus.lineLength = helper_->hblankToLineLength(hblank);
- deviceStatus.shutterSpeed = helper_->exposure(exposureLines, mode_.minLineLength);
+ deviceStatus.shutterSpeed = helper_->exposure(exposureLines, deviceStatus.lineLength);
deviceStatus.analogueGain = helper_->gain(gainCode);
deviceStatus.frameLength = mode_.height + vblank;
@@ -1156,7 +1156,7 @@ void IPARPi::applyAWB(const struct AwbStatus *awbStatus, ControlList &ctrls)
void IPARPi::applyFrameDurations(Duration minFrameDuration, Duration maxFrameDuration)
{
const Duration minSensorFrameDuration = mode_.minFrameLength * mode_.minLineLength;
- const Duration maxSensorFrameDuration = mode_.maxFrameLength * mode_.minLineLength;
+ const Duration maxSensorFrameDuration = mode_.maxFrameLength * mode_.maxLineLength;
/*
* This will only be applied once AGC recalculations occur.
@@ -1177,11 +1177,11 @@ void IPARPi::applyFrameDurations(Duration minFrameDuration, Duration maxFrameDur
/*
* Calculate the maximum exposure time possible for the AGC to use.
- * getVBlanking() will update maxShutter with the largest exposure
+ * getBlanking() will update maxShutter with the largest exposure
* value possible.
*/
Duration maxShutter = Duration::max();
- helper_->getVBlanking(maxShutter, minFrameDuration_, maxFrameDuration_);
+ helper_->getBlanking(maxShutter, minFrameDuration_, maxFrameDuration_);
RPiController::AgcAlgorithm *agc = dynamic_cast<RPiController::AgcAlgorithm *>(
controller_.getAlgorithm("agc"));
@@ -1199,10 +1199,11 @@ void IPARPi::applyAGC(const struct AgcStatus *agcStatus, ControlList &ctrls)
*/
gainCode = std::min<int32_t>(gainCode, maxSensorGainCode_);
- /* getVBlanking might clip exposure time to the fps limits. */
+ /* getBlanking might clip exposure time to the fps limits. */
Duration exposure = agcStatus->shutterTime;
- int32_t vblanking = helper_->getVBlanking(exposure, minFrameDuration_, maxFrameDuration_);
- int32_t exposureLines = helper_->exposureLines(exposure, mode_.minLineLength);
+ auto [vblank, hblank] = helper_->getBlanking(exposure, minFrameDuration_, maxFrameDuration_);
+ int32_t exposureLines = helper_->exposureLines(exposure,
+ helper_->hblankToLineLength(hblank));
LOG(IPARPI, Debug) << "Applying AGC Exposure: " << exposure
<< " (Shutter lines: " << exposureLines << ", AGC requested "
@@ -1210,14 +1211,22 @@ void IPARPi::applyAGC(const struct AgcStatus *agcStatus, ControlList &ctrls)
<< agcStatus->analogueGain << " (Gain Code: "
<< gainCode << ")";
- /*
- * Due to the behavior of V4L2, the current value of VBLANK could clip the
- * exposure time without us knowing. The next time though this function should
- * clip exposure correctly.
- */
- ctrls.set(V4L2_CID_VBLANK, vblanking);
+ ctrls.set(V4L2_CID_VBLANK, static_cast<int32_t>(vblank));
ctrls.set(V4L2_CID_EXPOSURE, exposureLines);
ctrls.set(V4L2_CID_ANALOGUE_GAIN, gainCode);
+
+ /*
+ * At present, there is no way of knowing if a control is read-only.
+ * As a workaround, assume that if the minimum and maximum values of
+ * the V4L2_CID_HBLANK control are the same, it implies the control
+ * is read-only. This seems to be the case for all the cameras our IPA
+ * works with.
+ *
+ * \todo The control API ought to have a flag to specify if a control
+ * is read-only which could be used below.
+ */
+ if (mode_.minLineLength != mode_.maxLineLength)
+ ctrls.set(V4L2_CID_HBLANK, static_cast<int32_t>(hblank));
}
void IPARPi::applyDG(const struct AgcStatus *dgStatus, ControlList &ctrls)
generated by cgit v1.2.1 (git 2.18.0) at 2024-06-26 19:36:19 +0000