v1

.gitignore

@@ -0,0 +1 @@
+*.pro.user

Cam2Ascii.pro

@@ -0,0 +1,38 @@
+QT       += core gui multimedia multimediawidgets
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+CONFIG += c++17
+
+# The following define makes your compiler emit warnings if you use
+# any Qt feature that has been marked deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# remove possible other optimization flags
+QMAKE_CXXFLAGS_RELEASE -= -O
+QMAKE_CXXFLAGS_RELEASE -= -O1
+QMAKE_CXXFLAGS_RELEASE *= -O2
+
+RC_ICONS = icon.ico
+
+# You can also make your code fail to compile if it uses deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += \
+    main.cpp \
+    mainwindow.cpp
+
+HEADERS += \
+    mainwindow.h
+
+FORMS += \
+    mainwindow.ui
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

main.cpp

@@ -0,0 +1,11 @@
+#include "mainwindow.h"
+
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    MainWindow w;
+    w.show();
+    return a.exec();
+}

mainwindow.cpp

@@ -0,0 +1,162 @@
+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+    , ui(new Ui::MainWindow)
+{
+    ui->setupUi(this);
+
+    cameras_availables = QCameraInfo::availableCameras();
+    for (const QCameraInfo &cameraInfo : cameras_availables)
+    {
+        ui->devicesBox->addItem(cameraInfo.description());
+    }
+    ui->devicesBox->setEditText(QCameraInfo::defaultCamera().description());
+    revert();
+    init(QCameraInfo::defaultCamera());
+    QObject::connect(ui->startAndStopButton, &QPushButton::clicked, this, &MainWindow::start_or_stop);
+    QObject::connect(ui->devicesBox, qOverload<int>(&QComboBox::currentIndexChanged), this, &MainWindow::config_changed);
+    QObject::connect(ui->sourceWidth, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), this, &MainWindow::config_changed);
+    QObject::connect(ui->sourceHeight, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), this, &MainWindow::config_changed);
+    QObject::connect(ui->asciiWidth, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), this, &MainWindow::config_changed);
+    QObject::connect(ui->asciiHeight, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), this, &MainWindow::config_changed);
+    QObject::connect(ui->charEdit, &QLineEdit::textEdited, this, &MainWindow::config_changed);
+    QObject::connect(ui->disableProcess, &QCheckBox::clicked, this, &MainWindow::config_changed);
+    QObject::connect(ui->applyButton, &QPushButton::clicked, this, &MainWindow::apply);
+    QObject::connect(ui->revertButton, &QPushButton::clicked, this, &MainWindow::revert);
+    QObject::connect(this, &MainWindow::image_processed, [&, this] (QPixmap img) {
+        img = img.scaled(ascii_width, ascii_height);
+        ui->screen->setPixmap(img);
+        fps += 1;
+    });
+    QObject::connect(this, &MainWindow::tick_framerate, [&, this] () {
+        ui->framerate->display(fps);
+        fps = 0;
+    });
+}
+
+void MainWindow::init(QCameraInfo cam)
+{
+    camera = new QCamera(cam);
+    image_capture = new QCameraImageCapture(camera);
+    image_capture->setCaptureDestination(QCameraImageCapture::CaptureDestination::CaptureToBuffer);
+    camera->setCaptureMode(QCamera::CaptureStillImage);
+    camera->start();
+    QObject::connect(image_capture, &QCameraImageCapture::imageCaptured, [&, this] (int id, QImage img) {
+        img = img.scaled(source_width, source_height);
+        if (!disable_process) {
+            convert(img);
+        } else {
+            ui->screen->setPixmap(QPixmap::fromImage(img));
+            fps += 1;
+        }
+    });
+}
+
+MainWindow::~MainWindow()
+{
+    delete_all();
+    delete ui;
+}
+
+void MainWindow::delete_all() {
+    if (thread_running) {
+        start_or_stop();
+    }
+    camera->unlock();
+    camera->stop();
+    delete camera;
+    delete image_capture;
+}
+
+void MainWindow::convert(QImage in) {
+    int length = chars.length();
+    QString res = "";
+    for (int y = 0; y < in.height(); y+=4) {
+        for (int x = 1; x < in.width(); x+=2) {
+            QColor pix1(in.pixel(x, y));
+            int avg1 = (pix1.red() + pix1.green() + pix1.blue()) / 3;
+            QColor pix2(in.pixel(x-1, y));
+            int avg2 = (pix2.red() + pix2.green() + pix2.blue()) / 3;
+            double avg = floor(avg1 + avg2 / 2);
+            int char_index = floor(((256.0 - avg) / 256.0) * (length - 1));
+            if (char_index >= length) char_index = length - 1;
+            if (char_index < 0) char_index = 0;
+            res += chars[char_index];
+        }
+        res += '\n';
+    }
+    QBitmap bitmap(1920,1080);
+    bitmap.fill(Qt::white);
+    QPainter painter(&bitmap);
+    QFont serifFont("Consolas", 12);
+    painter.setFont(serifFont);
+    painter.setPen(Qt::black);
+    const QRect rectangle = QRect(0, 0, 1920, 1080);
+    QRect boundingRect;
+    painter.drawText(rectangle, 0, res, &boundingRect);
+    painter.save();
+    QPixmap pix(bitmap);
+    emit image_processed(pix);
+}
+
+void MainWindow::start_or_stop() {
+    if (thread_running) {
+        thread_running = false;
+        capture_thread->wait();
+        framerate_count->wait();
+        delete capture_thread;
+        delete framerate_count;
+        ui->startAndStopButton->setText("Start");
+    } else {
+        ui->startAndStopButton->setText("Stop");
+        thread_running = true;
+        capture_thread = QThread::create([&, this]() {
+            while(thread_running) {
+                image_capture->capture();
+                QThread::msleep(refresh_timer);
+            }
+        });
+        framerate_count = QThread::create([&, this]() {
+            while(thread_running) {
+                QThread::sleep(1);
+                emit tick_framerate();
+            }
+        });
+        capture_thread->start();
+        framerate_count->start();
+    }
+
+}
+
+void MainWindow::apply() {
+    ui->applyButton->setEnabled(false);
+    ui->revertButton->setEnabled(false);
+    delete_all();
+    QCameraInfo cam = cameras_availables[ui->devicesBox->currentIndex()];
+    init(cam);
+    source_width = ui->sourceWidth->value();
+    source_height = ui->sourceHeight->value();
+    ascii_width = ui->asciiWidth->value();
+    ascii_height = ui->asciiHeight->value();
+    chars = ui->charEdit->text();
+    disable_process = ui->disableProcess->checkState();
+    refresh_timer = ui->refreshTimer->value();
+}
+
+void MainWindow::revert() {
+    ui->sourceWidth->setValue(source_width);
+    ui->sourceHeight->setValue(source_height);
+    ui->asciiWidth->setValue(ascii_width);
+    ui->asciiHeight->setValue(ascii_height);
+    ui->charEdit->setText(chars);
+    ui->refreshTimer->setValue(refresh_timer);
+    ui->applyButton->setEnabled(false);
+    ui->revertButton->setEnabled(false);
+}
+
+void MainWindow::config_changed() {
+    ui->applyButton->setEnabled(true);
+    ui->revertButton->setEnabled(true);
+}

mainwindow.h

@@ -0,0 +1,66 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QCamera>
+#include <QCameraViewfinder>
+#include <QCameraImageCapture>
+#include <QBuffer>
+#include <QThread>
+#include <QGraphicsScene>
+#include <QGraphicsPixmapItem>
+#include <QMap>
+#include <QBitmap>
+#include <QPainter>
+#include <QStaticText>
+#include <QCameraInfo>
+
+QT_BEGIN_NAMESPACE
+namespace Ui { class MainWindow; }
+QT_END_NAMESPACE
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow(QWidget *parent = nullptr);
+    ~MainWindow();
+
+public slots:
+    void start_or_stop();
+    void apply();
+    void revert();
+    void config_changed();
+
+signals:
+    void image_processed(QPixmap img);
+    void tick_framerate();
+
+private:
+    Ui::MainWindow *ui;
+    QCamera *camera;
+    QCameraImageCapture *image_capture;
+
+    QThread *capture_thread;
+    QThread *framerate_count;
+    QCameraInfo selected_camera;
+
+    bool thread_running = false;
+    QString chars = " .~#☻░▒";
+    int source_width = 480;
+    int source_height = 360;
+    int ascii_width = 771;
+    int ascii_height = 531;
+    int refresh_timer = 25;
+    bool disable_process = false;
+
+    int fps = 0;
+
+    QList<QCameraInfo> cameras_availables;
+
+    void init(QCameraInfo cam);
+    void convert(QImage in);
+    void delete_all();
+};
+#endif // MAINWINDOW_H

mainwindow.ui

@@ -0,0 +1,379 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>1007</width>
+    <height>561</height>
+   </rect>
+  </property>
+  <property name="minimumSize">
+   <size>
+    <width>800</width>
+    <height>561</height>
+   </size>
+  </property>
+  <property name="maximumSize">
+   <size>
+    <width>1007</width>
+    <height>561</height>
+   </size>
+  </property>
+  <property name="windowTitle">
+   <string>Cam2Ascii (Demo)</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <widget class="QLabel" name="screen">
+    <property name="geometry">
+     <rect>
+      <x>10</x>
+      <y>10</y>
+      <width>771</width>
+      <height>531</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Currently stopped</string>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignCenter</set>
+    </property>
+   </widget>
+   <widget class="Line" name="line">
+    <property name="geometry">
+     <rect>
+      <x>800</x>
+      <y>10</y>
+      <width>20</width>
+      <height>541</height>
+     </rect>
+    </property>
+    <property name="orientation">
+     <enum>Qt::Vertical</enum>
+    </property>
+   </widget>
+   <widget class="QComboBox" name="devicesBox">
+    <property name="geometry">
+     <rect>
+      <x>820</x>
+      <y>30</y>
+      <width>181</width>
+      <height>22</height>
+     </rect>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_2">
+    <property name="geometry">
+     <rect>
+      <x>820</x>
+      <y>10</y>
+      <width>47</width>
+      <height>14</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Device</string>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_3">
+    <property name="geometry">
+     <rect>
+      <x>820</x>
+      <y>70</y>
+      <width>111</width>
+      <height>16</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Source scale</string>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_4">
+    <property name="geometry">
+     <rect>
+      <x>879</x>
+      <y>94</y>
+      <width>47</width>
+      <height>14</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Width</string>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_5">
+    <property name="geometry">
+     <rect>
+      <x>880</x>
+      <y>120</y>
+      <width>47</width>
+      <height>14</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Height</string>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+    </property>
+   </widget>
+   <widget class="QSpinBox" name="sourceWidth">
+    <property name="geometry">
+     <rect>
+      <x>931</x>
+      <y>90</y>
+      <width>61</width>
+      <height>22</height>
+     </rect>
+    </property>
+    <property name="maximum">
+     <number>3840</number>
+    </property>
+   </widget>
+   <widget class="QSpinBox" name="sourceHeight">
+    <property name="geometry">
+     <rect>
+      <x>931</x>
+      <y>116</y>
+      <width>61</width>
+      <height>22</height>
+     </rect>
+    </property>
+    <property name="maximum">
+     <number>2160</number>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_6">
+    <property name="geometry">
+     <rect>
+      <x>820</x>
+      <y>180</y>
+      <width>111</width>
+      <height>16</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>ASCII Video output</string>
+    </property>
+   </widget>
+   <widget class="QSpinBox" name="asciiHeight">
+    <property name="geometry">
+     <rect>
+      <x>932</x>
+      <y>232</y>
+      <width>61</width>
+      <height>22</height>
+     </rect>
+    </property>
+    <property name="maximum">
+     <number>2160</number>
+    </property>
+   </widget>
+   <widget class="QSpinBox" name="asciiWidth">
+    <property name="geometry">
+     <rect>
+      <x>932</x>
+      <y>206</y>
+      <width>61</width>
+      <height>22</height>
+     </rect>
+    </property>
+    <property name="maximum">
+     <number>3840</number>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_7">
+    <property name="geometry">
+     <rect>
+      <x>881</x>
+      <y>236</y>
+      <width>47</width>
+      <height>14</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Height</string>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_8">
+    <property name="geometry">
+     <rect>
+      <x>880</x>
+      <y>210</y>
+      <width>47</width>
+      <height>14</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Width</string>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+    </property>
+   </widget>
+   <widget class="QLineEdit" name="charEdit">
+    <property name="geometry">
+     <rect>
+      <x>827</x>
+      <y>300</y>
+      <width>161</width>
+      <height>21</height>
+     </rect>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_9">
+    <property name="geometry">
+     <rect>
+      <x>830</x>
+      <y>280</y>
+      <width>111</width>
+      <height>16</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Characters</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="applyButton">
+    <property name="enabled">
+     <bool>false</bool>
+    </property>
+    <property name="geometry">
+     <rect>
+      <x>915</x>
+      <y>520</y>
+      <width>80</width>
+      <height>22</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Apply</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="revertButton">
+    <property name="enabled">
+     <bool>false</bool>
+    </property>
+    <property name="geometry">
+     <rect>
+      <x>827</x>
+      <y>520</y>
+      <width>80</width>
+      <height>22</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Revert</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="startAndStopButton">
+    <property name="geometry">
+     <rect>
+      <x>830</x>
+      <y>488</y>
+      <width>161</width>
+      <height>22</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Start</string>
+    </property>
+   </widget>
+   <widget class="Line" name="line_2">
+    <property name="geometry">
+     <rect>
+      <x>820</x>
+      <y>58</y>
+      <width>181</width>
+      <height>16</height>
+     </rect>
+    </property>
+    <property name="orientation">
+     <enum>Qt::Horizontal</enum>
+    </property>
+   </widget>
+   <widget class="QCheckBox" name="disableProcess">
+    <property name="geometry">
+     <rect>
+      <x>830</x>
+      <y>330</y>
+      <width>161</width>
+      <height>20</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Disable process</string>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_10">
+    <property name="geometry">
+     <rect>
+      <x>815</x>
+      <y>151</y>
+      <width>111</width>
+      <height>20</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Refresh timer (ms)</string>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+    </property>
+   </widget>
+   <widget class="QSpinBox" name="refreshTimer">
+    <property name="geometry">
+     <rect>
+      <x>930</x>
+      <y>150</y>
+      <width>61</width>
+      <height>22</height>
+     </rect>
+    </property>
+    <property name="minimum">
+     <number>25</number>
+    </property>
+    <property name="maximum">
+     <number>5000</number>
+    </property>
+   </widget>
+   <widget class="QLCDNumber" name="framerate">
+    <property name="geometry">
+     <rect>
+      <x>923</x>
+      <y>440</y>
+      <width>71</width>
+      <height>31</height>
+     </rect>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_11">
+    <property name="geometry">
+     <rect>
+      <x>880</x>
+      <y>420</y>
+      <width>111</width>
+      <height>16</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Framerate</string>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+    </property>
+   </widget>
+  </widget>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>