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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* camera_session.cpp - Camera capture session
*/
#include <iomanip>
#include <iostream>
#include <limits.h>
#include <sstream>
#include <libcamera/control_ids.h>
#include <libcamera/property_ids.h>
#include "camera_session.h"
#include "event_loop.h"
#include "file_sink.h"
#ifdef HAVE_KMS
#include "kms_sink.h"
#endif
#include "main.h"
#include "stream_options.h"
using namespace libcamera;
CameraSession::CameraSession(CameraManager *cm,
const std::string &cameraId,
unsigned int cameraIndex,
const OptionsParser::Options &options)
: options_(options), cameraIndex_(cameraIndex), last_(0),
queueCount_(0), captureCount_(0), captureLimit_(0),
printMetadata_(false)
{
char *endptr;
unsigned long index = strtoul(cameraId.c_str(), &endptr, 10);
if (*endptr == '\0' && index > 0 && index <= cm->cameras().size())
camera_ = cm->cameras()[index - 1];
else
camera_ = cm->get(cameraId);
if (!camera_) {
std::cerr << "Camera " << cameraId << " not found" << std::endl;
return;
}
if (camera_->acquire()) {
std::cerr << "Failed to acquire camera " << cameraId
<< std::endl;
return;
}
StreamRoles roles = StreamKeyValueParser::roles(options_[OptStream]);
std::unique_ptr<CameraConfiguration> config =
camera_->generateConfiguration(roles);
if (!config || config->size() != roles.size()) {
std::cerr << "Failed to get default stream configuration"
<< std::endl;
return;
}
/* Apply configuration if explicitly requested. */
if (StreamKeyValueParser::updateConfiguration(config.get(),
options_[OptStream])) {
std::cerr << "Failed to update configuration" << std::endl;
return;
}
bool strictFormats = options_.isSet(OptStrictFormats);
#ifdef HAVE_KMS
if (options_.isSet(OptDisplay)) {
if (options_.isSet(OptFile)) {
std::cerr << "--display and --file options are mutually exclusive"
<< std::endl;
return;
}
if (roles.size() != 1) {
std::cerr << "Display doesn't support multiple streams"
<< std::endl;
return;
}
if (roles[0] != StreamRole::Viewfinder) {
std::cerr << "Display requires a viewfinder stream"
<< std::endl;
return;
}
}
#endif
switch (config->validate()) {
case CameraConfiguration::Valid:
break;
case CameraConfiguration::Adjusted:
if (strictFormats) {
std::cout << "Adjusting camera configuration disallowed by --strict-formats argument"
<< std::endl;
return;
}
std::cout << "Camera configuration adjusted" << std::endl;
break;
case CameraConfiguration::Invalid:
std::cout << "Camera configuration invalid" << std::endl;
return;
}
config_ = std::move(config);
}
CameraSession::~CameraSession()
{
if (camera_)
camera_->release();
}
void CameraSession::listControls() const
{
for (const auto &ctrl : camera_->controls()) {
const ControlId *id = ctrl.first;
const ControlInfo &info = ctrl.second;
std::cout << "Control: " << id->name() << ": "
<< info.toString() << std::endl;
}
}
void CameraSession::listProperties() const
{
for (const auto &prop : camera_->properties()) {
const ControlId *id = properties::properties.at(prop.first);
const ControlValue &value = prop.second;
std::cout << "Property: " << id->name() << " = "
<< value.toString() << std::endl;
}
}
void CameraSession::infoConfiguration() const
{
unsigned int index = 0;
for (const StreamConfiguration &cfg : *config_) {
std::cout << index << ": " << cfg.toString() << std::endl;
const StreamFormats &formats = cfg.formats();
for (PixelFormat pixelformat : formats.pixelformats()) {
std::cout << " * Pixelformat: "
<< pixelformat.toString() << " "
<< formats.range(pixelformat).toString()
<< std::endl;
for (const Size &size : formats.sizes(pixelformat))
std::cout << " - " << size.toString()
<< std::endl;
}
index++;
}
}
int CameraSession::start()
{
int ret;
queueCount_ = 0;
captureCount_ = 0;
captureLimit_ = options_[OptCapture].toInteger();
printMetadata_ = options_.isSet(OptMetadata);
ret = camera_->configure(config_.get());
if (ret < 0) {
std::cout << "Failed to configure camera" << std::endl;
return ret;
}
streamNames_.clear();
for (unsigned int index = 0; index < config_->size(); ++index) {
StreamConfiguration &cfg = config_->at(index);
streamNames_[cfg.stream()] = "cam" + std::to_string(cameraIndex_)
+ "-stream" + std::to_string(index);
}
camera_->requestCompleted.connect(this, &CameraSession::requestComplete);
#ifdef HAVE_KMS
if (options_.isSet(OptDisplay))
sink_ = std::make_unique<KMSSink>(options_[OptDisplay].toString());
#endif
if (options_.isSet(OptFile)) {
if (!options_[OptFile].toString().empty())
sink_ = std::make_unique<FileSink>(streamNames_,
options_[OptFile]);
else
sink_ = std::make_unique<FileSink>(streamNames_);
}
if (sink_) {
ret = sink_->configure(*config_);
if (ret < 0) {
std::cout << "Failed to configure frame sink"
<< std::endl;
return ret;
}
sink_->requestProcessed.connect(this, &CameraSession::sinkRelease);
}
allocator_ = std::make_unique<FrameBufferAllocator>(camera_);
return startCapture();
}
void CameraSession::stop()
{
int ret = camera_->stop();
if (ret)
std::cout << "Failed to stop capture" << std::endl;
if (sink_) {
ret = sink_->stop();
if (ret)
std::cout << "Failed to stop frame sink" << std::endl;
}
sink_.reset();
requests_.clear();
allocator_.reset();
}
int CameraSession::startCapture()
{
int ret;
/* Identify the stream with the least number of buffers. */
unsigned int nbuffers = UINT_MAX;
for (StreamConfiguration &cfg : *config_) {
ret = allocator_->allocate(cfg.stream());
if (ret < 0) {
std::cerr << "Can't allocate buffers" << std::endl;
return -ENOMEM;
}
unsigned int allocated = allocator_->buffers(cfg.stream()).size();
nbuffers = std::min(nbuffers, allocated);
}
/*
* TODO: make cam tool smarter to support still capture by for
* example pushing a button. For now run all streams all the time.
*/
for (unsigned int i = 0; i < nbuffers; i++) {
std::unique_ptr<Request> request = camera_->createRequest();
if (!request) {
std::cerr << "Can't create request" << std::endl;
return -ENOMEM;
}
for (StreamConfiguration &cfg : *config_) {
Stream *stream = cfg.stream();
const std::vector<std::unique_ptr<FrameBuffer>> &buffers =
allocator_->buffers(stream);
const std::unique_ptr<FrameBuffer> &buffer = buffers[i];
ret = request->addBuffer(stream, buffer.get());
if (ret < 0) {
std::cerr << "Can't set buffer for request"
<< std::endl;
return ret;
}
if (sink_)
sink_->mapBuffer(buffer.get());
}
requests_.push_back(std::move(request));
}
if (sink_) {
ret = sink_->start();
if (ret) {
std::cout << "Failed to start frame sink" << std::endl;
return ret;
}
}
ret = camera_->start();
if (ret) {
std::cout << "Failed to start capture" << std::endl;
if (sink_)
sink_->stop();
return ret;
}
for (std::unique_ptr<Request> &request : requests_) {
ret = queueRequest(request.get());
if (ret < 0) {
std::cerr << "Can't queue request" << std::endl;
camera_->stop();
if (sink_)
sink_->stop();
return ret;
}
}
if (captureLimit_)
std::cout << "cam" << cameraIndex_
<< ": Capture " << captureLimit_ << " frames"
<< std::endl;
else
std::cout << "cam" << cameraIndex_
<< ": Capture until user interrupts by SIGINT"
<< std::endl;
return 0;
}
int CameraSession::queueRequest(Request *request)
{
if (captureLimit_ && queueCount_ >= captureLimit_)
return 0;
queueCount_++;
return camera_->queueRequest(request);
}
void CameraSession::requestComplete(Request *request)
{
if (request->status() == Request::RequestCancelled)
return;
/*
* Defer processing of the completed request to the event loop, to avoid
* blocking the camera manager thread.
*/
EventLoop::instance()->callLater([=]() { processRequest(request); });
}
void CameraSession::processRequest(Request *request)
{
/*
* If we've reached the capture limit, we're done. This doesn't
* duplicate the check below that emits the captureDone signal, as this
* function will be called for each request still in flight after the
* capture limit is reached and we don't want to emit the signal every
* single time.
*/
if (captureLimit_ && captureCount_ >= captureLimit_)
return;
const Request::BufferMap &buffers = request->buffers();
/*
* Compute the frame rate. The timestamp is arbitrarily retrieved from
* the first buffer, as all buffers should have matching timestamps.
*/
uint64_t ts = buffers.begin()->second->metadata().timestamp;
double fps = ts - last_;
fps = last_ != 0 && fps ? 1000000000.0 / fps : 0.0;
last_ = ts;
bool requeue = true;
std::stringstream info;
info << ts / 1000000000 << "."
<< std::setw(6) << std::setfill('0') << ts / 1000 % 1000000
<< " (" << std::fixed << std::setprecision(2) << fps << " fps)";
for (auto it = buffers.begin(); it != buffers.end(); ++it) {
const Stream *stream = it->first;
FrameBuffer *buffer = it->second;
const FrameMetadata &metadata = buffer->metadata();
info << " " << streamNames_[stream]
<< " seq: " << std::setw(6) << std::setfill('0') << metadata.sequence
<< " bytesused: ";
unsigned int nplane = 0;
for (const FrameMetadata::Plane &plane : metadata.planes()) {
info << plane.bytesused;
if (++nplane < metadata.planes().size())
info << "/";
}
}
if (sink_) {
if (!sink_->processRequest(request))
requeue = false;
}
std::cout << info.str() << std::endl;
if (printMetadata_) {
const ControlList &requestMetadata = request->metadata();
for (const auto &ctrl : requestMetadata) {
const ControlId *id = controls::controls.at(ctrl.first);
std::cout << "\t" << id->name() << " = "
<< ctrl.second.toString() << std::endl;
}
}
/*
* Notify the user that capture is complete if the limit has just been
* reached.
*/
captureCount_++;
if (captureLimit_ && captureCount_ >= captureLimit_) {
captureDone.emit();
return;
}
/*
* If the frame sink holds on the request, we'll requeue it later in the
* complete handler.
*/
if (!requeue)
return;
request->reuse(Request::ReuseBuffers);
camera_->queueRequest(request);
}
void CameraSession::sinkRelease(Request *request)
{
request->reuse(Request::ReuseBuffers);
queueRequest(request);
}
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