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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* main_window.cpp - qcam - Main application window
*/
#include <iomanip>
#include <iostream>
#include <string>
#include <QCoreApplication>
#include <QInputDialog>
#include <QTimer>
#include <libcamera/camera_manager.h>
#include "main_window.h"
#include "viewfinder.h"
using namespace libcamera;
MainWindow::MainWindow(const OptionsParser::Options &options)
: options_(options), isCapturing_(false)
{
int ret;
viewfinder_ = new ViewFinder(this);
setCentralWidget(viewfinder_);
viewfinder_->setFixedSize(500, 500);
adjustSize();
ret = openCamera();
if (!ret)
ret = startCapture();
if (ret < 0)
QTimer::singleShot(0, QCoreApplication::instance(),
&QCoreApplication::quit);
}
MainWindow::~MainWindow()
{
if (camera_) {
stopCapture();
camera_->release();
camera_.reset();
}
CameraManager::instance()->stop();
}
int MainWindow::openCamera()
{
CameraManager *cm = CameraManager::instance();
std::string cameraName;
if (!options_.isSet(OptCamera)) {
QStringList cameras;
bool result;
for (const std::shared_ptr<Camera> &cam : cm->cameras())
cameras.append(QString::fromStdString(cam->name()));
QString name = QInputDialog::getItem(this, "Select Camera",
"Camera:", cameras, 0,
false, &result);
if (!result)
return -EINVAL;
cameraName = name.toStdString();
} else {
cameraName = static_cast<std::string>(options_[OptCamera]);
}
camera_ = cm->get(cameraName);
if (!camera_) {
std::cout << "Camera " << cameraName << " not found"
<< std::endl;
return -ENODEV;
}
if (camera_->acquire()) {
std::cout << "Failed to acquire camera" << std::endl;
camera_.reset();
return -EBUSY;
}
std::cout << "Using camera " << camera_->name() << std::endl;
camera_->requestCompleted.connect(this, &MainWindow::requestComplete);
return 0;
}
int MainWindow::startCapture()
{
int ret;
config_ = camera_->generateConfiguration({ Stream::VideoRecording() });
Stream *stream = config_.front();
ret = camera_->configure(config_);
if (ret < 0) {
std::cout << "Failed to configure camera" << std::endl;
return ret;
}
const StreamConfiguration &cfg = config_[stream];
ret = viewfinder_->setFormat(cfg.pixelFormat, cfg.size.width,
cfg.size.height);
if (ret < 0) {
std::cout << "Failed to set viewfinder format" << std::endl;
return ret;
}
adjustSize();
ret = camera_->allocateBuffers();
if (ret) {
std::cerr << "Failed to allocate buffers"
<< std::endl;
return ret;
}
BufferPool &pool = stream->bufferPool();
std::vector<Request *> requests;
for (Buffer &buffer : pool.buffers()) {
Request *request = camera_->createRequest();
if (!request) {
std::cerr << "Can't create request" << std::endl;
ret = -ENOMEM;
goto error;
}
std::map<Stream *, Buffer *> map;
map[stream] = &buffer;
ret = request->setBuffers(map);
if (ret < 0) {
std::cerr << "Can't set buffers for request" << std::endl;
goto error;
}
requests.push_back(request);
}
ret = camera_->start();
if (ret) {
std::cout << "Failed to start capture" << std::endl;
goto error;
}
for (Request *request : requests) {
ret = camera_->queueRequest(request);
if (ret < 0) {
std::cerr << "Can't queue request" << std::endl;
goto error;
}
}
isCapturing_ = true;
return 0;
error:
for (Request *request : requests)
delete request;
camera_->freeBuffers();
return ret;
}
void MainWindow::stopCapture()
{
if (!isCapturing_)
return;
int ret = camera_->stop();
if (ret)
std::cout << "Failed to stop capture" << std::endl;
camera_->freeBuffers();
isCapturing_ = false;
}
void MainWindow::requestComplete(Request *request,
const std::map<Stream *, Buffer *> &buffers)
{
static uint64_t last = 0;
if (request->status() == Request::RequestCancelled)
return;
Buffer *buffer = buffers.begin()->second;
double fps = buffer->timestamp() - last;
fps = last && fps ? 1000000000.0 / fps : 0.0;
last = buffer->timestamp();
std::cout << "seq: " << std::setw(6) << std::setfill('0') << buffer->sequence()
<< " buf: " << buffer->index()
<< " bytesused: " << buffer->bytesused()
<< " timestamp: " << buffer->timestamp()
<< " fps: " << std::fixed << std::setprecision(2) << fps
<< std::endl;
display(buffer);
request = camera_->createRequest();
if (!request) {
std::cerr << "Can't create request" << std::endl;
return;
}
request->setBuffers(buffers);
camera_->queueRequest(request);
}
int MainWindow::display(Buffer *buffer)
{
if (buffer->planes().size() != 1)
return -EINVAL;
Plane &plane = buffer->planes().front();
unsigned char *raw = static_cast<unsigned char *>(plane.mem());
viewfinder_->display(raw, buffer->bytesused());
return 0;
}
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