[libcamera-devel] [PATCH v2 1/2] ipa: ipu3: Replace event-based ops with dedicated functions
Umang Jain
umang.jain at ideasonboard.com
Sat Mar 5 20:05:49 CET 2022
The IPAIPU3 interface currently uses event-type based structures in
order to communicate with the pipeline-handler (and vice-versa).
Replace the event based structures with dedicated functions associated
to each operation.
The translated naming scheme of operations to dedicated functions:
ActionSetSensorControls => setSensorControls
ActionParamFilled => paramsBufferReady
ActionMetadataReady => statsBufferReady
EventProcessControls => processControls()
EventStatReady => processStatsBuffer()
EventFillParams => processParamsBuffer()
Signed-off-by: Umang Jain <umang.jain at ideasonboard.com>
---
include/libcamera/ipa/ipu3.mojom | 36 ++-----
src/ipa/ipu3/ipu3-ipa-design-guide.rst | 19 ++--
src/ipa/ipu3/ipu3.cpp | 133 +++++++++++--------------
src/libcamera/pipeline/ipu3/ipu3.cpp | 123 ++++++++++-------------
4 files changed, 132 insertions(+), 179 deletions(-)
diff --git a/include/libcamera/ipa/ipu3.mojom b/include/libcamera/ipa/ipu3.mojom
index cc0d822f..c2c6beba 100644
--- a/include/libcamera/ipa/ipu3.mojom
+++ b/include/libcamera/ipa/ipu3.mojom
@@ -8,32 +8,6 @@ module ipa.ipu3;
import "include/libcamera/ipa/core.mojom";
-enum IPU3Operations {
- ActionSetSensorControls = 1,
- ActionParamFilled = 2,
- ActionMetadataReady = 3,
- EventProcessControls = 4,
- EventStatReady = 5,
- EventFillParams = 6,
-};
-
-struct IPU3Event {
- IPU3Operations op;
- uint32 frame;
- int64 frameTimestamp;
- uint32 bufferId;
- libcamera.ControlList controls;
- libcamera.ControlList sensorControls;
- libcamera.ControlList lensControls;
-};
-
-struct IPU3Action {
- IPU3Operations op;
- libcamera.ControlList controls;
- libcamera.ControlList sensorControls;
- libcamera.ControlList lensControls;
-};
-
struct IPAConfigInfo {
libcamera.IPACameraSensorInfo sensorInfo;
libcamera.ControlInfoMap sensorControls;
@@ -55,9 +29,15 @@ interface IPAIPU3Interface {
mapBuffers(array<libcamera.IPABuffer> buffers);
unmapBuffers(array<uint32> ids);
- [async] processEvent(IPU3Event ev);
+ [async] processControls(uint32 frame, libcamera.ControlList controls);
+ [async] processParamsBuffer(uint32 frame, uint32 bufferId);
+ [async] processStatsBuffer(uint32 frame, int64 frameTimestamp,
+ uint32 bufferId, libcamera.ControlList sensorControls);
};
interface IPAIPU3EventInterface {
- queueFrameAction(uint32 frame, IPU3Action action);
+ setSensorControls(uint32 frame, libcamera.ControlList sensorControls,
+ libcamera.ControlList lensControls);
+ paramsBufferReady(uint32 frame);
+ statsBufferReady(uint32 frame, libcamera.ControlList metadata);
};
diff --git a/src/ipa/ipu3/ipu3-ipa-design-guide.rst b/src/ipa/ipu3/ipu3-ipa-design-guide.rst
index 89c71108..c1ee00f1 100644
--- a/src/ipa/ipu3/ipu3-ipa-design-guide.rst
+++ b/src/ipa/ipu3/ipu3-ipa-design-guide.rst
@@ -25,7 +25,8 @@ from applications, and managing events from the pipeline handler.
└─┬───┬───┬──────┬────┬────┬────┬─┴────▼─┬──┘ 1: init()
│ │ │ │ ▲ │ ▲ │ ▲ │ ▲ │ 2: configure()
│1 │2 │3 │4│ │4│ │4│ │4│ │5 3: mapBuffers(), start()
- ▼ ▼ ▼ ▼ │ ▼ │ ▼ │ ▼ │ ▼ 4: processEvent()
+ │ │ │ │ │ │ │ │ │ │ │ │ 4: (▼) processControls(), processParamsBuffer(), processStatsBuffer()
+ ▼ ▼ ▼ ▼ │ ▼ │ ▼ │ ▼ │ ▼ (▲) setSensorControls, paramsBufferReady, statsBufferReady Signals
┌──────────────────┴────┴────┴────┴─────────┐ 5: stop(), unmapBuffers()
│ IPU3 IPA │
│ ┌───────────────────────┐ │
@@ -100,8 +101,9 @@ There are three main interactions with the algorithms for the IPU3 IPA
to operate when running:
- configure()
-- processEvent(``EventFillParams``)
-- processEvent(``EventStatReady``)
+- processParamsBuffer()
+- processControls()
+- processStatsBuffer()
The configuration phase allows the pipeline-handler to inform the IPA of
the current stream configurations, which is then passed into each
@@ -115,7 +117,7 @@ When configured, the IPA is notified by the pipeline handler of the
Camera ``start()`` event, after which incoming requests will be queued
for processing, requiring a parameter buffer (``ipu3_uapi_params``) to
be populated for the ImgU. This is given to the IPA through the
-``EventFillParams`` event, and then passed directly to each algorithm
+``processParamsBuffer()``, and then passed directly to each algorithm
through the ``prepare()`` call allowing the ISP configuration to be
updated for the needs of each component that the algorithm is
responsible for.
@@ -125,7 +127,7 @@ structure that it modifies, and it should take care to ensure that any
structure set by a use flag is fully initialised to suitable values.
The parameter buffer is returned to the pipeline handler through the
-``ActionParamFilled`` event, and from there queued to the ImgU along
+``paramsBufferReady`` signal, and from there queued to the ImgU along
with a raw frame captured with the CIO2.
Post-frame completion
@@ -134,7 +136,7 @@ Post-frame completion
When the capture of an image is completed, and successfully processed
through the ImgU, the generated statistics buffer
(``ipu3_uapi_stats_3a``) is given to the IPA through the
-``EventStatReady`` event. This provides the IPA with an opportunity to
+``processStatsBuffer()``. This provides the IPA with an opportunity to
examine the results of the ISP and run the calculations required by each
algorithm on the new data. The algorithms may require context from the
operations of other algorithms, for example, the AWB might choose to use
@@ -145,11 +147,14 @@ before they are needed.
The ordering of the algorithm processing is determined by their
placement in the ``IPU3::algorithms_`` ordered list.
+Finally, the IPA metadata for the completed frame is returned back via
+the ``statsBufferReady`` signal.
+
Sensor Controls
~~~~~~~~~~~~~~~
The AutoExposure and AutoGain (AGC) algorithm differs slightly from the
others as it requires operating directly on the sensor, as opposed to
through the ImgU ISP. To support this, there is a dedicated action
-`ActionSetSensorControls` to allow the IPA to request controls to be set
+``setSensorControls`` signal to allow the IPA to request controls to be set
on the camera sensor through the pipeline handler.
diff --git a/src/ipa/ipu3/ipu3.cpp b/src/ipa/ipu3/ipu3.cpp
index 583d6b9a..8f079588 100644
--- a/src/ipa/ipu3/ipu3.cpp
+++ b/src/ipa/ipu3/ipu3.cpp
@@ -64,8 +64,9 @@ namespace ipa::ipu3 {
* The IPU3 Pipeline defines an IPU3-specific interface for communication
* between the PipelineHandler and the IPA module.
*
- * We extend the IPAIPU3Interface to implement our algorithms and handle events
- * from the IPU3 PipelineHandler to satisfy requests from the application.
+ * We extend the IPAIPU3Interface to implement our algorithms and handle
+ * invocations from the IPU3 PipelineHandler to satisfy requests from the
+ * application.
*
* At initialisation time, a CameraSensorHelper is instantiated to support
* camera-specific calculations, while the default controls are computed, and
@@ -80,14 +81,14 @@ namespace ipa::ipu3 {
* parameter buffer, and adapting the settings of the sensor attached to the
* IPU3 CIO2 through sensor-specific V4L2 controls.
*
- * When the event \a EventFillParams occurs we populate the ImgU parameter
- * buffer with settings to configure the device in preparation for handling the
- * frame queued in the Request.
+ * In \a processParamsBuffer(), we populate the ImgU parameter buffer with
+ * settings to configure the device in preparation for handling the frame
+ * queued in the Request.
*
* When the frame has completed processing, the ImgU will generate a statistics
- * buffer which is given to the IPA as part of the \a EventStatReady event. At
- * this event we run the algorithms to parse the statistics and cache any
- * results for the next \a EventFillParams event.
+ * buffer which is given to the IPA \a processStatsBuffer(). In this we run the
+ * algorithms to parse the statistics and cache any results for the next
+ * \a processParamsBuffer() invocation.
*
* The individual algorithms are split into modular components that are called
* iteratively to allow them to process statistics from the ImgU in a defined
@@ -142,14 +143,18 @@ public:
void mapBuffers(const std::vector<IPABuffer> &buffers) override;
void unmapBuffers(const std::vector<unsigned int> &ids) override;
- void processEvent(const IPU3Event &event) override;
+
+ void processParamsBuffer(const uint32_t frame, const uint32_t bufferId) override;
+ void processControls(const uint32_t frame, const ControlList &controls) override;
+ void processStatsBuffer(const uint32_t frame, const int64_t frameTimestamp,
+ const uint32_t bufferId, const ControlList &sensorControls) override;
private:
void updateControls(const IPACameraSensorInfo &sensorInfo,
const ControlInfoMap &sensorControls,
ControlInfoMap *ipaControls);
void updateSessionConfiguration(const ControlInfoMap &sensorControls);
- void processControls(unsigned int frame, const ControlList &controls);
+
void fillParams(unsigned int frame, ipu3_uapi_params *params);
void parseStatistics(unsigned int frame,
int64_t frameTimestamp,
@@ -487,61 +492,49 @@ void IPAIPU3::unmapBuffers(const std::vector<unsigned int> &ids)
}
/**
- * \brief Process an event generated by the pipeline handler
- * \param[in] event The event sent from pipeline handler
- *
- * The expected event handling over the lifetime of a Request has
- * the following sequence:
- *
- * - EventProcessControls : Handle controls from a new Request
- * - EventFillParams : Prepare the ISP to process the Request
- * - EventStatReady : Process statistics after ISP completion
+ * \brief Prepare the ISP to process the Request
+ * \param[in] frame The frame number
+ * \param[in] bufferId Buffer ID
*/
-void IPAIPU3::processEvent(const IPU3Event &event)
+void IPAIPU3::processParamsBuffer(const uint32_t frame, const uint32_t bufferId)
{
- switch (event.op) {
- case EventProcessControls: {
- processControls(event.frame, event.controls);
- break;
- }
- case EventFillParams: {
- auto it = buffers_.find(event.bufferId);
- if (it == buffers_.end()) {
- LOG(IPAIPU3, Error) << "Could not find param buffer!";
- return;
- }
-
- Span<uint8_t> mem = it->second.planes()[0];
- ipu3_uapi_params *params =
- reinterpret_cast<ipu3_uapi_params *>(mem.data());
-
- fillParams(event.frame, params);
- break;
+ auto it = buffers_.find(bufferId);
+ if (it == buffers_.end()) {
+ LOG(IPAIPU3, Error) << "Could not find param buffer!";
+ return;
}
- case EventStatReady: {
- auto it = buffers_.find(event.bufferId);
- if (it == buffers_.end()) {
- LOG(IPAIPU3, Error) << "Could not find stats buffer!";
- return;
- }
- Span<uint8_t> mem = it->second.planes()[0];
- const ipu3_uapi_stats_3a *stats =
- reinterpret_cast<ipu3_uapi_stats_3a *>(mem.data());
+ Span<uint8_t> mem = it->second.planes()[0];
+ ipu3_uapi_params *params =
+ reinterpret_cast<ipu3_uapi_params *>(mem.data());
- int32_t exposure = event.sensorControls.get(V4L2_CID_EXPOSURE).get<int32_t>();
- int32_t gain = event.sensorControls.get(V4L2_CID_ANALOGUE_GAIN).get<int32_t>();
-
- context_.frameContext.sensor.exposure = exposure;
- context_.frameContext.sensor.gain = camHelper_->gain(gain);
+ fillParams(frame, params);
+}
- parseStatistics(event.frame, event.frameTimestamp, stats);
- break;
- }
- default:
- LOG(IPAIPU3, Error) << "Unknown event " << event.op;
- break;
+/**
+ * \brief Process statistics after ISP completion
+ * \param[in] frame The frame number
+ * \param[in] frameTimestamp Timestamp of the frame
+ * \param[in] bufferId Buffer ID
+ * \param[in] sensorControls Sensor controls
+ */
+void IPAIPU3::processStatsBuffer(const uint32_t frame, const int64_t frameTimestamp,
+ const uint32_t bufferId, const ControlList &sensorControls)
+{
+ auto it = buffers_.find(bufferId);
+ if (it == buffers_.end()) {
+ LOG(IPAIPU3, Error) << "Could not find stats buffer!";
+ return;
}
+
+ Span<uint8_t> mem = it->second.planes()[0];
+ const ipu3_uapi_stats_3a *stats =
+ reinterpret_cast<ipu3_uapi_stats_3a *>(mem.data());
+
+ context_.frameContext.sensor.exposure = sensorControls.get(V4L2_CID_EXPOSURE).get<int32_t>();
+ context_.frameContext.sensor.gain = camHelper_->gain(sensorControls.get(V4L2_CID_ANALOGUE_GAIN).get<int32_t>());
+
+ parseStatistics(frame, frameTimestamp, stats);
}
/**
@@ -552,7 +545,7 @@ void IPAIPU3::processEvent(const IPU3Event &event)
* Parse the request to handle any IPA-managed controls that were set from the
* application such as manual sensor settings.
*/
-void IPAIPU3::processControls([[maybe_unused]] unsigned int frame,
+void IPAIPU3::processControls(const uint32_t frame,
[[maybe_unused]] const ControlList &controls)
{
/* \todo Start processing for 'frame' based on 'controls'. */
@@ -582,10 +575,7 @@ void IPAIPU3::fillParams(unsigned int frame, ipu3_uapi_params *params)
for (auto const &algo : algorithms_)
algo->prepare(context_, params);
- IPU3Action op;
- op.op = ActionParamFilled;
-
- queueFrameAction.emit(frame, op);
+ paramsBufferReady.emit(frame);
}
/**
@@ -629,11 +619,7 @@ void IPAIPU3::parseStatistics(unsigned int frame,
* likely want to avoid putting platform specific metadata in.
*/
- IPU3Action op;
- op.op = ActionMetadataReady;
- op.controls = ctrls;
-
- queueFrameAction.emit(frame, op);
+ statsBufferReady.emit(frame, ctrls);
}
/**
@@ -645,18 +631,19 @@ void IPAIPU3::parseStatistics(unsigned int frame,
*/
void IPAIPU3::setControls(unsigned int frame)
{
- IPU3Action op;
- op.op = ActionSetSensorControls;
-
int32_t exposure = context_.frameContext.agc.exposure;
int32_t gain = camHelper_->gainCode(context_.frameContext.agc.gain);
ControlList ctrls(ctrls_);
ctrls.set(V4L2_CID_EXPOSURE, exposure);
ctrls.set(V4L2_CID_ANALOGUE_GAIN, gain);
- op.sensorControls = ctrls;
- queueFrameAction.emit(frame, op);
+ ControlList lensCtrls(ctrls_);
+ /*
+ * \todo: lensCtrls.set(V4L2_CID_FOCUS_ABSOLUTE, <lens_position>));
+ */
+
+ setSensorControls.emit(frame, ctrls, lensCtrls);
}
} /* namespace ipa::ipu3 */
diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp
index 6c5617cd..07dc4c96 100644
--- a/src/libcamera/pipeline/ipu3/ipu3.cpp
+++ b/src/libcamera/pipeline/ipu3/ipu3.cpp
@@ -86,8 +86,10 @@ public:
ControlInfoMap ipaControls_;
private:
- void queueFrameAction(unsigned int id,
- const ipa::ipu3::IPU3Action &action);
+ void metadataReady(unsigned int id, const ControlList &metadata);
+ void paramFilled(unsigned int id);
+ void setSensorControls(unsigned int id, const ControlList &sensorControls,
+ const ControlList &lensControls);
};
class IPU3CameraConfiguration : public CameraConfiguration
@@ -866,11 +868,7 @@ void IPU3CameraData::queuePendingRequests()
info->rawBuffer = rawBuffer;
- ipa::ipu3::IPU3Event ev;
- ev.op = ipa::ipu3::EventProcessControls;
- ev.frame = info->id;
- ev.controls = request->controls();
- ipa_->processEvent(ev);
+ ipa_->processControls(info->id, request->controls());
pendingRequests_.pop();
processingRequests_.push(request);
@@ -1213,7 +1211,9 @@ int IPU3CameraData::loadIPA()
if (!ipa_)
return -ENOENT;
- ipa_->queueFrameAction.connect(this, &IPU3CameraData::queueFrameAction);
+ ipa_->setSensorControls.connect(this, &IPU3CameraData::setSensorControls);
+ ipa_->paramsBufferReady.connect(this, &IPU3CameraData::paramFilled);
+ ipa_->statsBufferReady.connect(this, &IPU3CameraData::metadataReady);
/*
* Pass the sensor info to the IPA to initialize controls.
@@ -1248,69 +1248,59 @@ int IPU3CameraData::loadIPA()
return 0;
}
-void IPU3CameraData::queueFrameAction(unsigned int id,
- const ipa::ipu3::IPU3Action &action)
+void IPU3CameraData::setSensorControls([[maybe_unused]] unsigned int id,
+ const ControlList &sensorControls,
+ const ControlList &lensControls)
{
- switch (action.op) {
- case ipa::ipu3::ActionSetSensorControls: {
- const ControlList &sensorControls = action.sensorControls;
- delayedCtrls_->push(sensorControls);
+ delayedCtrls_->push(sensorControls);
- CameraLens *focusLens = cio2_.sensor()->focusLens();
- if (!focusLens)
- break;
-
- const ControlList lensControls = action.lensControls;
- if (!lensControls.contains(V4L2_CID_FOCUS_ABSOLUTE))
- break;
+ CameraLens *focusLens = cio2_.sensor()->focusLens();
+ if (!focusLens)
+ return;
- const ControlValue &focusValue =
- lensControls.get(V4L2_CID_FOCUS_ABSOLUTE);
+ if (!lensControls.contains(V4L2_CID_FOCUS_ABSOLUTE))
+ return;
- focusLens->setFocusPostion(focusValue.get<int32_t>());
+ const ControlValue &focusValue =
+ lensControls.get(V4L2_CID_FOCUS_ABSOLUTE);
- break;
- }
- case ipa::ipu3::ActionParamFilled: {
- IPU3Frames::Info *info = frameInfos_.find(id);
- if (!info)
- break;
-
- /* Queue all buffers from the request aimed for the ImgU. */
- for (auto it : info->request->buffers()) {
- const Stream *stream = it.first;
- FrameBuffer *outbuffer = it.second;
+ focusLens->setFocusPostion(focusValue.get<int32_t>());
+}
- if (stream == &outStream_)
- imgu_->output_->queueBuffer(outbuffer);
- else if (stream == &vfStream_)
- imgu_->viewfinder_->queueBuffer(outbuffer);
- }
+void IPU3CameraData::paramFilled(unsigned int id)
+{
+ IPU3Frames::Info *info = frameInfos_.find(id);
+ if (!info)
+ return;
- imgu_->param_->queueBuffer(info->paramBuffer);
- imgu_->stat_->queueBuffer(info->statBuffer);
- imgu_->input_->queueBuffer(info->rawBuffer);
+ /* Queue all buffers from the request aimed for the ImgU. */
+ for (auto it : info->request->buffers()) {
+ const Stream *stream = it.first;
+ FrameBuffer *outbuffer = it.second;
- break;
+ if (stream == &outStream_)
+ imgu_->output_->queueBuffer(outbuffer);
+ else if (stream == &vfStream_)
+ imgu_->viewfinder_->queueBuffer(outbuffer);
}
- case ipa::ipu3::ActionMetadataReady: {
- IPU3Frames::Info *info = frameInfos_.find(id);
- if (!info)
- break;
- Request *request = info->request;
- request->metadata().merge(action.controls);
+ imgu_->param_->queueBuffer(info->paramBuffer);
+ imgu_->stat_->queueBuffer(info->statBuffer);
+ imgu_->input_->queueBuffer(info->rawBuffer);
+}
- info->metadataProcessed = true;
- if (frameInfos_.tryComplete(info))
- pipe()->completeRequest(request);
+void IPU3CameraData::metadataReady(unsigned int id, const ControlList &metadata)
+{
+ IPU3Frames::Info *info = frameInfos_.find(id);
+ if (!info)
+ return;
- break;
- }
- default:
- LOG(IPU3, Error) << "Unknown action " << action.op;
- break;
- }
+ Request *request = info->request;
+ request->metadata().merge(metadata);
+
+ info->metadataProcessed = true;
+ if (frameInfos_.tryComplete(info))
+ pipe()->completeRequest(request);
}
/* -----------------------------------------------------------------------------
@@ -1385,11 +1375,7 @@ void IPU3CameraData::cio2BufferReady(FrameBuffer *buffer)
if (request->findBuffer(&rawStream_))
pipe()->completeBuffer(request, buffer);
- ipa::ipu3::IPU3Event ev;
- ev.op = ipa::ipu3::EventFillParams;
- ev.frame = info->id;
- ev.bufferId = info->paramBuffer->cookie();
- ipa_->processEvent(ev);
+ ipa_->processParamsBuffer(info->id, info->paramBuffer->cookie());
}
void IPU3CameraData::paramBufferReady(FrameBuffer *buffer)
@@ -1433,13 +1419,8 @@ void IPU3CameraData::statBufferReady(FrameBuffer *buffer)
return;
}
- ipa::ipu3::IPU3Event ev;
- ev.op = ipa::ipu3::EventStatReady;
- ev.frame = info->id;
- ev.bufferId = info->statBuffer->cookie();
- ev.frameTimestamp = request->metadata().get(controls::SensorTimestamp);
- ev.sensorControls = info->effectiveSensorControls;
- ipa_->processEvent(ev);
+ ipa_->processStatsBuffer(info->id, request->metadata().get(controls::SensorTimestamp),
+ info->statBuffer->cookie(), info->effectiveSensorControls);
}
/*
--
2.31.0
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