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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2020, Google Inc.
*
* ipu3.cpp - IPU3 Image Processing Algorithms
*/
#include <stdint.h>
#include <sys/mman.h>
#include <linux/intel-ipu3.h>
#include <linux/v4l2-controls.h>
#include <libcamera/buffer.h>
#include <libcamera/control_ids.h>
#include <libcamera/ipa/ipa_interface.h>
#include <libcamera/ipa/ipa_module_info.h>
#include <libcamera/ipa/ipu3_ipa_interface.h>
#include <libcamera/request.h>
#include "libcamera/internal/buffer.h"
#include "libcamera/internal/log.h"
namespace libcamera {
LOG_DEFINE_CATEGORY(IPAIPU3)
class IPAIPU3 : public ipa::ipu3::IPAIPU3Interface
{
public:
int init([[maybe_unused]] const IPASettings &settings) override
{
return 0;
}
int start() override { return 0; }
void stop() override {}
void configure(const std::map<uint32_t, ControlInfoMap> &entityControls) override;
void mapBuffers(const std::vector<IPABuffer> &buffers) override;
void unmapBuffers(const std::vector<unsigned int> &ids) override;
void processEvent(const ipa::ipu3::IPU3Event &event) override;
private:
void processControls(unsigned int frame, const ControlList &controls);
void fillParams(unsigned int frame, ipu3_uapi_params *params);
void parseStatistics(unsigned int frame,
const ipu3_uapi_stats_3a *stats);
void setControls(unsigned int frame);
std::map<unsigned int, MappedFrameBuffer> buffers_;
ControlInfoMap ctrls_;
/* Camera sensor controls. */
uint32_t exposure_;
uint32_t minExposure_;
uint32_t maxExposure_;
uint32_t gain_;
uint32_t minGain_;
uint32_t maxGain_;
};
void IPAIPU3::configure(const std::map<uint32_t, ControlInfoMap> &entityControls)
{
if (entityControls.empty())
return;
ctrls_ = entityControls.at(0);
const auto itExp = ctrls_.find(V4L2_CID_EXPOSURE);
if (itExp == ctrls_.end()) {
LOG(IPAIPU3, Error) << "Can't find exposure control";
return;
}
const auto itGain = ctrls_.find(V4L2_CID_ANALOGUE_GAIN);
if (itGain == ctrls_.end()) {
LOG(IPAIPU3, Error) << "Can't find gain control";
return;
}
minExposure_ = std::max(itExp->second.min().get<int32_t>(), 1);
maxExposure_ = itExp->second.max().get<int32_t>();
exposure_ = maxExposure_;
minGain_ = std::max(itGain->second.min().get<int32_t>(), 1);
maxGain_ = itGain->second.max().get<int32_t>();
gain_ = maxGain_;
setControls(0);
}
void IPAIPU3::mapBuffers(const std::vector<IPABuffer> &buffers)
{
for (const IPABuffer &buffer : buffers) {
const FrameBuffer fb(buffer.planes);
buffers_.emplace(buffer.id,
MappedFrameBuffer(&fb, PROT_READ | PROT_WRITE));
}
}
void IPAIPU3::unmapBuffers(const std::vector<unsigned int> &ids)
{
for (unsigned int id : ids) {
auto it = buffers_.find(id);
if (it == buffers_.end())
continue;
buffers_.erase(it);
}
}
void IPAIPU3::processEvent(const ipa::ipu3::IPU3Event &event)
{
switch (event.op) {
case ipa::ipu3::EventProcessControls: {
processControls(event.frame, event.controls);
break;
}
case ipa::ipu3::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.maps()[0];
const ipu3_uapi_stats_3a *stats =
reinterpret_cast<ipu3_uapi_stats_3a *>(mem.data());
parseStatistics(event.frame, stats);
break;
}
case ipa::ipu3::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.maps()[0];
ipu3_uapi_params *params =
reinterpret_cast<ipu3_uapi_params *>(mem.data());
fillParams(event.frame, params);
break;
}
default:
LOG(IPAIPU3, Error) << "Unknown event " << event.op;
break;
}
}
void IPAIPU3::processControls([[maybe_unused]] unsigned int frame,
[[maybe_unused]] const ControlList &controls)
{
/* \todo Start processing for 'frame' based on 'controls'. */
}
void IPAIPU3::fillParams(unsigned int frame, ipu3_uapi_params *params)
{
/* Prepare parameters buffer. */
memset(params, 0, sizeof(*params));
/* \todo Fill in parameters buffer. */
ipa::ipu3::IPU3Action op;
op.op = ipa::ipu3::ActionParamFilled;
queueFrameAction.emit(frame, op);
/* \todo Calculate new values for exposure_ and gain_. */
setControls(frame);
}
void IPAIPU3::parseStatistics(unsigned int frame,
[[maybe_unused]] const ipu3_uapi_stats_3a *stats)
{
ControlList ctrls(controls::controls);
/* \todo React to statistics and update internal state machine. */
/* \todo Add meta-data information to ctrls. */
ipa::ipu3::IPU3Action op;
op.op = ipa::ipu3::ActionMetadataReady;
op.controls = ctrls;
queueFrameAction.emit(frame, op);
}
void IPAIPU3::setControls(unsigned int frame)
{
ipa::ipu3::IPU3Action op;
op.op = ipa::ipu3::ActionSetSensorControls;
ControlList ctrls(ctrls_);
ctrls.set(V4L2_CID_EXPOSURE, static_cast<int32_t>(exposure_));
ctrls.set(V4L2_CID_ANALOGUE_GAIN, static_cast<int32_t>(gain_));
op.controls = ctrls;
queueFrameAction.emit(frame, op);
}
/*
* External IPA module interface
*/
extern "C" {
const struct IPAModuleInfo ipaModuleInfo = {
IPA_MODULE_API_VERSION,
1,
"PipelineHandlerIPU3",
"ipu3",
};
IPAInterface *ipaCreate()
{
return new IPAIPU3();
}
}
} /* namespace libcamera */
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