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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* rkisp1.cpp - RkISP1 Image Processing Algorithms
*/
#include <algorithm>
#include <math.h>
#include <queue>
#include <stdint.h>
#include <string.h>
#include <linux/rkisp1-config.h>
#include <ipa/ipa_interface.h>
#include <ipa/ipa_module_info.h>
#include <ipa/rkisp1.h>
#include <libcamera/buffer.h>
#include <libcamera/control_ids.h>
#include <libcamera/request.h>
#include "log.h"
#include "utils.h"
namespace libcamera {
LOG_DEFINE_CATEGORY(IPARkISP1)
class IPARkISP1 : public IPAInterface
{
public:
int init() override { return 0; }
void configure(const std::map<unsigned int, IPAStream> &streamConfig,
const std::map<unsigned int, const ControlInfoMap &> &entityControls) override;
void mapBuffers(const std::vector<IPABuffer> &buffers) override;
void unmapBuffers(const std::vector<unsigned int> &ids) override;
void processEvent(const IPAOperationData &event) override;
private:
void queueRequest(unsigned int frame, rkisp1_isp_params_cfg *params,
const ControlList &controls);
void updateStatistics(unsigned int frame,
const rkisp1_stat_buffer *stats);
void setControls(unsigned int frame);
void metadataReady(unsigned int frame, unsigned int aeState);
std::map<unsigned int, BufferMemory> bufferInfo_;
ControlInfoMap ctrls_;
/* Camera sensor controls. */
bool autoExposure_;
uint32_t exposure_;
uint32_t minExposure_;
uint32_t maxExposure_;
uint32_t gain_;
uint32_t minGain_;
uint32_t maxGain_;
};
void IPARkISP1::configure(const std::map<unsigned int, IPAStream> &streamConfig,
const std::map<unsigned int, const ControlInfoMap &> &entityControls)
{
if (entityControls.empty())
return;
ctrls_ = entityControls.at(0);
const auto itExp = ctrls_.find(V4L2_CID_EXPOSURE);
if (itExp == ctrls_.end()) {
LOG(IPARkISP1, Error) << "Can't find exposure control";
return;
}
const auto itGain = ctrls_.find(V4L2_CID_ANALOGUE_GAIN);
if (itGain == ctrls_.end()) {
LOG(IPARkISP1, Error) << "Can't find gain control";
return;
}
autoExposure_ = true;
minExposure_ = std::max<uint32_t>(itExp->second.min().get<int32_t>(), 1);
maxExposure_ = itExp->second.max().get<int32_t>();
exposure_ = minExposure_;
minGain_ = std::max<uint32_t>(itGain->second.min().get<int32_t>(), 1);
maxGain_ = itGain->second.max().get<int32_t>();
gain_ = minGain_;
LOG(IPARkISP1, Info)
<< "Exposure: " << minExposure_ << "-" << maxExposure_
<< " Gain: " << minGain_ << "-" << maxGain_;
setControls(0);
}
void IPARkISP1::mapBuffers(const std::vector<IPABuffer> &buffers)
{
for (const IPABuffer &buffer : buffers) {
bufferInfo_[buffer.id] = buffer.memory;
bufferInfo_[buffer.id].planes()[0].mem();
}
}
void IPARkISP1::unmapBuffers(const std::vector<unsigned int> &ids)
{
for (unsigned int id : ids)
bufferInfo_.erase(id);
}
void IPARkISP1::processEvent(const IPAOperationData &event)
{
switch (event.operation) {
case RKISP1_IPA_EVENT_SIGNAL_STAT_BUFFER: {
unsigned int frame = event.data[0];
unsigned int bufferId = event.data[1];
const rkisp1_stat_buffer *stats =
static_cast<rkisp1_stat_buffer *>(bufferInfo_[bufferId].planes()[0].mem());
updateStatistics(frame, stats);
break;
}
case RKISP1_IPA_EVENT_QUEUE_REQUEST: {
unsigned int frame = event.data[0];
unsigned int bufferId = event.data[1];
rkisp1_isp_params_cfg *params =
static_cast<rkisp1_isp_params_cfg *>(bufferInfo_[bufferId].planes()[0].mem());
queueRequest(frame, params, event.controls[0]);
break;
}
default:
LOG(IPARkISP1, Error) << "Unkown event " << event.operation;
break;
}
}
void IPARkISP1::queueRequest(unsigned int frame, rkisp1_isp_params_cfg *params,
const ControlList &controls)
{
/* Prepare parameters buffer. */
memset(params, 0, sizeof(*params));
/* Auto Exposure on/off. */
if (controls.contains(controls::AeEnable)) {
autoExposure_ = controls.get(controls::AeEnable);
if (autoExposure_)
params->module_ens = CIFISP_MODULE_AEC;
params->module_en_update = CIFISP_MODULE_AEC;
}
IPAOperationData op;
op.operation = RKISP1_IPA_ACTION_PARAM_FILLED;
queueFrameAction.emit(frame, op);
}
void IPARkISP1::updateStatistics(unsigned int frame,
const rkisp1_stat_buffer *stats)
{
const cifisp_stat *params = &stats->params;
unsigned int aeState = 0;
if (stats->meas_type & CIFISP_STAT_AUTOEXP) {
const cifisp_ae_stat *ae = ¶ms->ae;
const unsigned int target = 60;
unsigned int value = 0;
unsigned int num = 0;
for (int i = 0; i < CIFISP_AE_MEAN_MAX; i++) {
if (ae->exp_mean[i] <= 15)
continue;
value += ae->exp_mean[i];
num++;
}
value /= num;
double factor = (double)target / value;
if (frame % 3 == 0) {
double exposure;
exposure = factor * exposure_ * gain_ / minGain_;
exposure_ = utils::clamp<uint64_t>((uint64_t)exposure,
minExposure_,
maxExposure_);
exposure = exposure / exposure_ * minGain_;
gain_ = utils::clamp<uint64_t>((uint64_t)exposure,
minGain_, maxGain_);
setControls(frame + 1);
}
aeState = fabs(factor - 1.0f) < 0.05f ? 2 : 1;
}
metadataReady(frame, aeState);
}
void IPARkISP1::setControls(unsigned int frame)
{
IPAOperationData op;
op.operation = RKISP1_IPA_ACTION_V4L2_SET;
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.push_back(ctrls);
queueFrameAction.emit(frame, op);
}
void IPARkISP1::metadataReady(unsigned int frame, unsigned int aeState)
{
ControlList ctrls(controls::controls);
if (aeState)
ctrls.set(controls::AeLocked, aeState == 2);
IPAOperationData op;
op.operation = RKISP1_IPA_ACTION_METADATA;
op.controls.push_back(ctrls);
queueFrameAction.emit(frame, op);
}
/*
* External IPA module interface
*/
extern "C" {
const struct IPAModuleInfo ipaModuleInfo = {
IPA_MODULE_API_VERSION,
1,
"PipelineHandlerRkISP1",
"RkISP1 IPA",
"LGPL-2.1-or-later",
};
IPAInterface *ipaCreate()
{
return new IPARkISP1();
}
}
} /* namespace libcamera */
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