actual DSi camera support (#1520)

basically feeding something that isn't a fixed stripe pattern, and emulating enough of the camera hardware to make this work

11 files changed, 1374 insertions, 13 deletions

diff --git a/src/frontend/qt_sdl/CMakeLists.txt b/src/frontend/qt_sdl/CMakeLists.txt
index 5f1c490..a8d6e4b 100644
--- a/src/frontend/qt_sdl/CMakeLists.txt
+++ b/src/frontend/qt_sdl/CMakeLists.txt
@@ -14,6 +14,7 @@ set(SOURCES_QT_SDL
     InputConfig/MapButton.h
     InputConfig/resources/ds.qrc
     VideoSettingsDialog.cpp
+	CameraSettingsDialog.cpp
     AudioSettingsDialog.cpp
     FirmwareSettingsDialog.cpp
     PathSettingsDialog.cpp
@@ -33,8 +34,9 @@ set(SOURCES_QT_SDL
     Platform.cpp
     QPathInput.h
     ROMManager.cpp
-    SaveManager.cpp
-
+	SaveManager.cpp
+	CameraManager.cpp
+    
     ArchiveUtil.h
     ArchiveUtil.cpp
 
@@ -58,11 +60,11 @@ if (WIN32)
 endif()
 
 if (USE_QT6)
-    find_package(Qt6 COMPONENTS Core Gui Widgets Network OpenGL OpenGLWidgets REQUIRED)
-    set(QT_LINK_LIBS Qt6::Core Qt6::Gui Qt6::Widgets Qt6::Network Qt6::OpenGL Qt6::OpenGLWidgets)
+    find_package(Qt6 COMPONENTS Core Gui Widgets Network Multimedia OpenGL OpenGLWidgets REQUIRED)
+    set(QT_LINK_LIBS Qt6::Core Qt6::Gui Qt6::Widgets Qt6::Network Qt6::Multimedia Qt6::OpenGL Qt6::OpenGLWidgets)
 else()
-    find_package(Qt5 COMPONENTS Core Gui Widgets Network REQUIRED)
-    set(QT_LINK_LIBS Qt5::Core Qt5::Gui Qt5::Widgets Qt5::Network)
+    find_package(Qt5 COMPONENTS Core Gui Widgets Network Multimedia REQUIRED)
+    set(QT_LINK_LIBS Qt5::Core Qt5::Gui Qt5::Widgets Qt5::Network Qt5::Multimedia)
 endif()
 
 set(CMAKE_AUTOMOC ON)
diff --git a/src/frontend/qt_sdl/CameraManager.cpp b/src/frontend/qt_sdl/CameraManager.cpp
new file mode 100644
index 0000000..23f25a6
--- /dev/null
+++ b/src/frontend/qt_sdl/CameraManager.cpp
@@ -0,0 +1,562 @@
+/*
+    Copyright 2016-2022 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#include "CameraManager.h"
+#include "Config.h"
+
+
+#if QT_VERSION >= 0x060000
+
+CameraFrameDumper::CameraFrameDumper(QObject* parent) : QVideoSink(parent)
+{
+    cam = (CameraManager*)parent;
+
+    connect(this, &CameraFrameDumper::videoFrameChanged, this, &CameraFrameDumper::present);
+}
+
+void CameraFrameDumper::present(const QVideoFrame& _frame)
+{
+    QVideoFrame frame(_frame);
+    if (!frame.map(QVideoFrame::ReadOnly))
+        return;
+    if (!frame.isReadable())
+    {
+        frame.unmap();
+        return;
+    }
+
+    switch (frame.pixelFormat())
+    {
+    case QVideoFrameFormat::Format_XRGB8888:
+    case QVideoFrameFormat::Format_YUYV:
+        cam->feedFrame((u32*)frame.bits(0), frame.width(), frame.height(), frame.pixelFormat() == QVideoFrameFormat::Format_YUYV);
+        break;
+
+    case QVideoFrameFormat::Format_NV12:
+        cam->feedFrame_NV12((u8*)frame.bits(0), (u8*)frame.bits(1), frame.width(), frame.height());
+        break;
+    }
+
+    frame.unmap();
+}
+
+#else
+
+CameraFrameDumper::CameraFrameDumper(QObject* parent) : QAbstractVideoSurface(parent)
+{
+    cam = (CameraManager*)parent;
+}
+
+bool CameraFrameDumper::present(const QVideoFrame& _frame)
+{
+    QVideoFrame frame(_frame);
+    if (!frame.map(QAbstractVideoBuffer::ReadOnly))
+        return false;
+    if (!frame.isReadable())
+    {
+        frame.unmap();
+        return false;
+    }
+
+    switch (frame.pixelFormat())
+    {
+    case QVideoFrame::Format_RGB32:
+    case QVideoFrame::Format_YUYV:
+        cam->feedFrame((u32*)frame.bits(0), frame.width(), frame.height(), frame.pixelFormat() == QVideoFrame::Format_YUYV);
+        break;
+
+    case QVideoFrame::Format_NV12:
+        cam->feedFrame_NV12((u8*)frame.bits(0), (u8*)frame.bits(1), frame.width(), frame.height());
+        break;
+    }
+
+    frame.unmap();
+
+    return true;
+}
+
+QList<QVideoFrame::PixelFormat> CameraFrameDumper::supportedPixelFormats(QAbstractVideoBuffer::HandleType type) const
+{
+    QList<QVideoFrame::PixelFormat> ret;
+
+    ret.append(QVideoFrame::Format_RGB32);
+    ret.append(QVideoFrame::Format_YUYV);
+    ret.append(QVideoFrame::Format_NV12);
+
+    return ret;
+}
+
+#endif
+
+
+CameraManager::CameraManager(int num, int width, int height, bool yuv) : QObject()
+{
+    this->num = num;
+
+    startNum = 0;
+
+    // QCamera needs to be controlled from the UI thread, hence this
+    connect(this, SIGNAL(camStartSignal()), this, SLOT(camStart()));
+    connect(this, SIGNAL(camStopSignal()), this, SLOT(camStop()));
+
+    frameWidth = width;
+    frameHeight = height;
+    frameFormatYUV = yuv;
+
+    int fbsize = frameWidth * frameHeight;
+    if (yuv) fbsize /= 2;
+    frameBuffer = new u32[fbsize];
+    tempFrameBuffer = new u32[fbsize];
+
+    inputType = -1;
+    xFlip = false;
+    init();
+}
+
+CameraManager::~CameraManager()
+{
+    deInit();
+
+    // save settings here?
+
+    delete[] frameBuffer;
+}
+
+void CameraManager::init()
+{
+    if (inputType != -1)
+        deInit();
+
+    startNum = 0;
+
+    inputType = Config::Camera[num].InputType;
+    imagePath = QString::fromStdString(Config::Camera[num].ImagePath);
+    camDeviceName = QString::fromStdString(Config::Camera[num].CamDeviceName);
+
+    camDevice = nullptr;
+
+    {
+        // fill the framebuffer with black
+
+        int total = frameWidth * frameHeight;
+        u32 fill = 0;
+        if (frameFormatYUV)
+        {
+            total /= 2;
+            fill = 0x80008000;
+        }
+
+        for (int i = 0; i < total; i++)
+            frameBuffer[i] = fill;
+    }
+
+    if (inputType == 1)
+    {
+        // still image
+
+        QImage img(imagePath);
+        if (!img.isNull())
+        {
+            QImage imgconv = img.convertToFormat(QImage::Format_RGB32);
+            if (frameFormatYUV)
+            {
+                copyFrame_RGBtoYUV((u32*)img.bits(), img.width(), img.height(),
+                                   frameBuffer, frameWidth, frameHeight,
+                                   false);
+            }
+            else
+            {
+                copyFrame_Straight((u32*)img.bits(), img.width(), img.height(),
+                                   frameBuffer, frameWidth, frameHeight,
+                                   false, false);
+            }
+        }
+    }
+    else if (inputType == 2)
+    {
+        // physical camera
+
+#if QT_VERSION >= 0x060000
+        const QList<QCameraDevice> cameras = QMediaDevices::videoInputs();
+        for (const QCameraDevice& cam : cameras)
+        {
+            if (QString(cam.id()) == camDeviceName)
+            {
+                camDevice = new QCamera(cam);
+                break;
+            }
+        }
+
+        if (camDevice)
+        {
+            const QList<QCameraFormat> supported = camDevice->cameraDevice().videoFormats();
+            bool good = false;
+            for (const QCameraFormat& item : supported)
+            {
+                if (item.pixelFormat() != QVideoFrameFormat::Format_YUYV &&
+                    item.pixelFormat() != QVideoFrameFormat::Format_NV12 &&
+                    item.pixelFormat() != QVideoFrameFormat::Format_XRGB8888)
+                    continue;
+
+                if (item.resolution().width() != 640 && item.resolution().height() != 480)
+                    continue;
+
+                camDevice->setCameraFormat(item);
+                good = true;
+                break;
+            }
+
+            if (!good)
+            {
+                delete camDevice;
+                camDevice = nullptr;
+            }
+            else
+            {
+                camDumper = new CameraFrameDumper(this);
+
+                camSession = new QMediaCaptureSession(this);
+                camSession->setCamera(camDevice);
+                camSession->setVideoOutput(camDumper);
+            }
+        }
+#else
+        camDevice = new QCamera(camDeviceName.toUtf8());
+        if (camDevice->error() != QCamera::NoError)
+        {
+            delete camDevice;
+            camDevice = nullptr;
+        }
+
+        if (camDevice)
+        {
+            camDevice->load();
+
+            const QList<QCameraViewfinderSettings> supported = camDevice->supportedViewfinderSettings();
+            bool good = false;
+            for (const QCameraViewfinderSettings& item : supported)
+            {
+                if (item.pixelFormat() != QVideoFrame::Format_YUYV &&
+                    item.pixelFormat() != QVideoFrame::Format_NV12 &&
+                    item.pixelFormat() != QVideoFrame::Format_RGB32)
+                    continue;
+
+                if (item.resolution().width() != 640 && item.resolution().height() != 480)
+                    continue;
+
+                camDevice->setViewfinderSettings(item);
+                good = true;
+                break;
+            }
+
+            camDevice->unload();
+
+            if (!good)
+            {
+                delete camDevice;
+                camDevice = nullptr;
+            }
+            else
+            {
+                camDumper = new CameraFrameDumper(this);
+                camDevice->setViewfinder(camDumper);
+            }
+        }
+#endif
+    }
+}
+
+void CameraManager::deInit()
+{
+    if (inputType == 2)
+    {
+        if (camDevice)
+        {
+            camDevice->stop();
+            delete camDevice;
+            delete camDumper;
+#if QT_VERSION >= 0x060000
+            delete camSession;
+#endif
+        }
+    }
+
+    camDevice = nullptr;
+    inputType = -1;
+}
+
+void CameraManager::start()
+{
+    if (startNum == 1) return;
+    startNum = 1;
+
+    if (inputType == 2)
+    {
+        emit camStartSignal();
+    }
+}
+
+void CameraManager::stop()
+{
+    if (startNum == 0) return;
+    startNum = 0;
+
+    if (inputType == 2)
+    {
+        emit camStopSignal();
+    }
+}
+
+bool CameraManager::isStarted()
+{
+    return startNum != 0;
+}
+
+void CameraManager::camStart()
+{
+    if (camDevice)
+        camDevice->start();
+}
+
+void CameraManager::camStop()
+{
+    if (camDevice)
+        camDevice->stop();
+}
+
+void CameraManager::setXFlip(bool flip)
+{
+    xFlip = flip;
+}
+
+void CameraManager::captureFrame(u32* frame, int width, int height, bool yuv)
+{
+    frameMutex.lock();
+
+    if ((width == frameWidth) &&
+        (height == frameHeight) &&
+        (yuv == frameFormatYUV) &&
+        (!xFlip))
+    {
+        int len = width * height;
+        if (yuv) len /= 2;
+        memcpy(frame, frameBuffer, len * sizeof(u32));
+    }
+    else
+    {
+        if (yuv == frameFormatYUV)
+        {
+            copyFrame_Straight(frameBuffer, frameWidth, frameHeight,
+                               frame, width, height,
+                               xFlip, yuv);
+        }
+        else if (yuv)
+        {
+            copyFrame_RGBtoYUV(frameBuffer, frameWidth, frameHeight,
+                               frame, width, height,
+                               xFlip);
+        }
+        else
+        {
+            copyFrame_YUVtoRGB(frameBuffer, frameWidth, frameHeight,
+                               frame, width, height,
+                               xFlip);
+        }
+    }
+
+    frameMutex.unlock();
+}
+
+void CameraManager::feedFrame(u32* frame, int width, int height, bool yuv)
+{
+    frameMutex.lock();
+
+    if (width == frameWidth && height == frameHeight && yuv == frameFormatYUV)
+    {
+        int len = width * height;
+        if (yuv) len /= 2;
+        memcpy(frameBuffer, frame, len * sizeof(u32));
+    }
+    else
+    {
+        if (yuv == frameFormatYUV)
+        {
+            copyFrame_Straight(frame, width, height,
+                               frameBuffer, frameWidth, frameHeight,
+                               false, yuv);
+        }
+        else if (yuv)
+        {
+            copyFrame_RGBtoYUV(frame, width, height,
+                               frameBuffer, frameWidth, frameHeight,
+                               false);
+        }
+        else
+        {
+            copyFrame_YUVtoRGB(frame, width, height,
+                               frameBuffer, frameWidth, frameHeight,
+                               false);
+        }
+    }
+
+    frameMutex.unlock();
+}
+
+void CameraManager::feedFrame_NV12(u8* planeY, u8* planeUV, int width, int height)
+{
+    for (int y = 0; y < frameHeight; y++)
+    {
+        int sy = (y * height) / frameHeight;
+
+        for (int x = 0; x < frameWidth; x+=2)
+        {
+            int sx1 = (x * width) / frameWidth;
+            int sx2 = ((x+1) * width) / frameWidth;
+
+            u32 val;
+
+            u8 y1 = planeY[(sy*width) + sx1];
+            u8 y2 = planeY[(sy*width) + sx2];
+
+            int uvpos = (((sy>>1)*(width>>1)) + (sx1>>1));
+            u8 u = planeUV[uvpos << 1];
+            u8 v = planeUV[(uvpos << 1) + 1];
+
+            val = y1 | (u << 8) | (y2 << 16) | (v << 24);
+            tempFrameBuffer[((y*frameWidth) + x) >> 1] = val;
+        }
+    }
+
+    feedFrame(tempFrameBuffer, frameWidth, frameHeight, true);
+}
+
+void CameraManager::copyFrame_Straight(u32* src, int swidth, int sheight, u32* dst, int dwidth, int dheight, bool xflip, bool yuv)
+{
+    u32 alpha = 0xFF000000;
+
+    if (yuv)
+    {
+        swidth /= 2;
+        dwidth /= 2;
+        alpha = 0;
+    }
+
+    for (int dy = 0; dy < dheight; dy++)
+    {
+        int sy = (dy * sheight) / dheight;
+
+        for (int dx = 0; dx < dwidth; dx++)
+        {
+            int sx = (dx * swidth) / dwidth;
+            if (xflip) sx = swidth-1 - sx;
+
+            dst[(dy * dwidth) + dx] = src[(sy * swidth) + sx] | alpha;
+        }
+    }
+}
+
+void CameraManager::copyFrame_RGBtoYUV(u32* src, int swidth, int sheight, u32* dst, int dwidth, int dheight, bool xflip)
+{
+    for (int dy = 0; dy < dheight; dy++)
+    {
+        int sy = (dy * sheight) / dheight;
+
+        for (int dx = 0; dx < dwidth; dx+=2)
+        {
+            int sx;
+
+            sx = (dx * swidth) / dwidth;
+            if (xflip) sx = swidth-1 - sx;
+
+            u32 pixel1 = src[sy*swidth + sx];
+
+            sx = ((dx+1) * swidth) / dwidth;
+            if (xflip) sx = swidth-1 - sx;
+
+            u32 pixel2 = src[sy*swidth + sx];
+
+            int r1 = (pixel1 >> 16) & 0xFF;
+            int g1 = (pixel1 >> 8) & 0xFF;
+            int b1 = pixel1 & 0xFF;
+
+            int r2 = (pixel2 >> 16) & 0xFF;
+            int g2 = (pixel2 >> 8) & 0xFF;
+            int b2 = pixel2 & 0xFF;
+
+            int y1 = ((r1 * 19595) + (g1 * 38470) + (b1 * 7471)) >> 16;
+            int u1 = ((b1 - y1) * 32244) >> 16;
+            int v1 = ((r1 - y1) * 57475) >> 16;
+
+            int y2 = ((r2 * 19595) + (g2 * 38470) + (b2 * 7471)) >> 16;
+            int u2 = ((b2 - y2) * 32244) >> 16;
+            int v2 = ((r2 - y2) * 57475) >> 16;
+
+            u1 += 128; v1 += 128;
+            u2 += 128; v2 += 128;
+
+            y1 = std::clamp(y1, 0, 255); u1 = std::clamp(u1, 0, 255); v1 = std::clamp(v1, 0, 255);
+            y2 = std::clamp(y2, 0, 255); u2 = std::clamp(u2, 0, 255); v2 = std::clamp(v2, 0, 255);
+
+            // huh
+            u1 = (u1 + u2) >> 1;
+            v1 = (v1 + v2) >> 1;
+
+            dst[(dy*dwidth + dx) / 2] = y1 | (u1 << 8) | (y2 << 16) | (v1 << 24);
+        }
+    }
+}
+
+void CameraManager::copyFrame_YUVtoRGB(u32* src, int swidth, int sheight, u32* dst, int dwidth, int dheight, bool xflip)
+{
+    for (int dy = 0; dy < dheight; dy++)
+    {
+        int sy = (dy * sheight) / dheight;
+
+        for (int dx = 0; dx < dwidth; dx+=2)
+        {
+            int sx = (dx * swidth) / dwidth;
+            if (xflip) sx = swidth-1 - sx;
+
+            u32 val = src[(sy*swidth + sx) / 2];
+
+            int y1 = val & 0xFF;
+            int u = (val >> 8) & 0xFF;
+            int y2 = (val >> 16) & 0xFF;
+            int v = (val >> 24) & 0xFF;
+
+            u -= 128; v -= 128;
+
+            int r1 = y1 + ((v * 91881) >> 16);
+            int g1 = y1 - ((v * 46793) >> 16) - ((u * 22544) >> 16);
+            int b1 = y1 + ((u * 116129) >> 16);
+
+            int r2 = y2 + ((v * 91881) >> 16);
+            int g2 = y2 - ((v * 46793) >> 16) - ((u * 22544) >> 16);
+            int b2 = y2 + ((u * 116129) >> 16);
+
+            r1 = std::clamp(r1, 0, 255); g1 = std::clamp(g1, 0, 255); b1 = std::clamp(b1, 0, 255);
+            r2 = std::clamp(r2, 0, 255); g2 = std::clamp(g2, 0, 255); b2 = std::clamp(b2, 0, 255);
+
+            u32 col1 = 0xFF000000 | (r1 << 16) | (g1 << 8) | b1;
+            u32 col2 = 0xFF000000 | (r2 << 16) | (g2 << 8) | b2;
+
+            dst[dy*dwidth + dx  ] = col1;
+            dst[dy*dwidth + dx+1] = col2;
+        }
+    }
+}
diff --git a/src/frontend/qt_sdl/CameraManager.h b/src/frontend/qt_sdl/CameraManager.h
new file mode 100644
index 0000000..36e8565
--- /dev/null
+++ b/src/frontend/qt_sdl/CameraManager.h
@@ -0,0 +1,133 @@
+/*
+    Copyright 2016-2022 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef CAMERAMANAGER_H
+#define CAMERAMANAGER_H
+
+#include <QCamera>
+#if QT_VERSION >= 0x060000
+    #include <QMediaDevices>
+    #include <QCameraDevice>
+    #include <QMediaCaptureSession>
+    #include <QVideoSink>
+#else
+    #include <QCameraInfo>
+    #include <QAbstractVideoSurface>
+    #include <QVideoSurfaceFormat>
+#endif
+#include <QMutex>
+
+#include "types.h"
+
+class CameraManager;
+
+
+#if QT_VERSION >= 0x060000
+
+class CameraFrameDumper : public QVideoSink
+{
+    Q_OBJECT
+
+public:
+    CameraFrameDumper(QObject* parent = nullptr);
+
+public slots:
+    void present(const QVideoFrame& frame);
+
+private:
+    CameraManager* cam;
+};
+
+#else
+
+class CameraFrameDumper : public QAbstractVideoSurface
+{
+    Q_OBJECT
+
+public:
+    CameraFrameDumper(QObject* parent = nullptr);
+
+    bool present(const QVideoFrame& frame) override;
+    QList<QVideoFrame::PixelFormat> supportedPixelFormats(QAbstractVideoBuffer::HandleType type = QAbstractVideoBuffer::NoHandle) const override;
+
+private:
+    CameraManager* cam;
+};
+
+#endif
+
+
+class CameraManager : public QObject
+{
+    Q_OBJECT
+
+public:
+    CameraManager(int num, int width, int height, bool yuv);
+    ~CameraManager();
+
+    void init();
+    void deInit();
+
+    void start();
+    void stop();
+    bool isStarted();
+
+    void setXFlip(bool flip);
+
+    void captureFrame(u32* frame, int width, int height, bool yuv);
+
+    void feedFrame(u32* frame, int width, int height, bool yuv);
+    void feedFrame_NV12(u8* planeY, u8* planeUV, int width, int height);
+
+signals:
+    void camStartSignal();
+    void camStopSignal();
+
+private slots:
+    void camStart();
+    void camStop();
+
+private:
+    int num;
+
+    int startNum;
+
+    int inputType;
+    QString imagePath;
+    QString camDeviceName;
+
+    QCamera* camDevice;
+    CameraFrameDumper* camDumper;
+#if QT_VERSION >= 0x060000
+    QMediaCaptureSession* camSession;
+#endif
+
+    int frameWidth, frameHeight;
+    bool frameFormatYUV;
+    u32* frameBuffer;
+    u32* tempFrameBuffer;
+    QMutex frameMutex;
+
+    bool xFlip;
+
+    void copyFrame_Straight(u32* src, int swidth, int sheight, u32* dst, int dwidth, int dheight, bool xflip, bool yuv);
+    void copyFrame_RGBtoYUV(u32* src, int swidth, int sheight, u32* dst, int dwidth, int dheight, bool xflip);
+    void copyFrame_YUVtoRGB(u32* src, int swidth, int sheight, u32* dst, int dwidth, int dheight, bool xflip);
+};
+
+#endif // CAMERAMANAGER_H
diff --git a/src/frontend/qt_sdl/CameraSettingsDialog.cpp b/src/frontend/qt_sdl/CameraSettingsDialog.cpp
new file mode 100644
index 0000000..1844e0f
--- /dev/null
+++ b/src/frontend/qt_sdl/CameraSettingsDialog.cpp
@@ -0,0 +1,304 @@
+/*
+    Copyright 2016-2022 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#include <stdio.h>
+#include <QFileDialog>
+#include <QPaintEvent>
+#include <QPainter>
+
+#include "types.h"
+
+#include "CameraSettingsDialog.h"
+#include "ui_CameraSettingsDialog.h"
+
+
+CameraSettingsDialog* CameraSettingsDialog::currentDlg = nullptr;
+
+extern std::string EmuDirectory;
+
+extern CameraManager* camManager[2];
+
+
+CameraPreviewPanel::CameraPreviewPanel(QWidget* parent) : QWidget(parent)
+{
+    currentCam = nullptr;
+    updateTimer = startTimer(50);
+}
+
+CameraPreviewPanel::~CameraPreviewPanel()
+{
+    killTimer(updateTimer);
+}
+
+void CameraPreviewPanel::paintEvent(QPaintEvent* event)
+{
+    QPainter painter(this);
+
+    if (!currentCam)
+    {
+        painter.fillRect(event->rect(), QColor::fromRgb(0, 0, 0));
+        return;
+    }
+
+    QImage picture(256, 192, QImage::Format_RGB32);
+    currentCam->captureFrame((u32*)picture.bits(), 256, 192, false);
+    painter.drawImage(0, 0, picture);
+}
+
+
+CameraSettingsDialog::CameraSettingsDialog(QWidget* parent) : QDialog(parent), ui(new Ui::CameraSettingsDialog)
+{
+    previewPanel = nullptr;
+    currentCfg = nullptr;
+    currentCam = nullptr;
+
+    ui->setupUi(this);
+    setAttribute(Qt::WA_DeleteOnClose);
+
+    for (int i = 0; i < 2; i++)
+    {
+        oldCamSettings[i] = Config::Camera[i];
+    }
+
+    ui->cbCameraSel->addItem("DSi outer camera");
+    ui->cbCameraSel->addItem("DSi inner camera");
+
+#if QT_VERSION >= 0x060000
+    const QList<QCameraDevice> cameras = QMediaDevices::videoInputs();
+    for (const QCameraDevice &cameraInfo : cameras)
+    {
+        QString name = cameraInfo.description();
+        QCameraDevice::Position pos = cameraInfo.position();
+        if (pos != QCameraDevice::UnspecifiedPosition)
+        {
+            name += " (";
+            if (pos == QCameraDevice::FrontFace)
+                name += "inner camera";
+            else if (pos == QCameraDevice::BackFace)
+                name += "outer camera";
+            name += ")";
+        }
+
+        ui->cbPhysicalCamera->addItem(name, QString(cameraInfo.id()));
+    }
+#else
+    const QList<QCameraInfo> cameras = QCameraInfo::availableCameras();
+    for (const QCameraInfo &cameraInfo : cameras)
+    {
+        QString name = cameraInfo.description();
+        QCamera::Position pos = cameraInfo.position();
+        if (pos != QCamera::UnspecifiedPosition)
+        {
+            name += " (";
+            if (pos == QCamera::FrontFace)
+                name += "inner camera";
+            else if (pos == QCamera::BackFace)
+                name += "outer camera";
+            name += ")";
+        }
+
+        ui->cbPhysicalCamera->addItem(name, cameraInfo.deviceName());
+    }
+#endif
+    ui->rbPictureCamera->setEnabled(ui->cbPhysicalCamera->count() > 0);
+
+    grpInputType = new QButtonGroup(this);
+    grpInputType->addButton(ui->rbPictureNone,   0);
+    grpInputType->addButton(ui->rbPictureImg,    1);
+    grpInputType->addButton(ui->rbPictureCamera, 2);
+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
+    connect(grpInputType, SIGNAL(buttonClicked(int)), this, SLOT(onChangeInputType(int)));
+#else
+    connect(grpInputType, SIGNAL(idClicked(int)), this, SLOT(onChangeInputType(int)));
+#endif
+
+    previewPanel = new CameraPreviewPanel(this);
+    QVBoxLayout* previewLayout = new QVBoxLayout();
+    previewLayout->addWidget(previewPanel);
+    ui->grpPreview->setLayout(previewLayout);
+    previewPanel->setMinimumSize(256, 192);
+    previewPanel->setMaximumSize(256, 192);
+
+    on_cbCameraSel_currentIndexChanged(ui->cbCameraSel->currentIndex());
+}
+
+CameraSettingsDialog::~CameraSettingsDialog()
+{
+    delete ui;
+}
+
+void CameraSettingsDialog::on_CameraSettingsDialog_accepted()
+{
+    for (int i = 0; i < 2; i++)
+    {
+        camManager[i]->stop();
+    }
+
+    Config::Save();
+
+    closeDlg();
+}
+
+void CameraSettingsDialog::on_CameraSettingsDialog_rejected()
+{
+    for (int i = 0; i < 2; i++)
+    {
+        camManager[i]->stop();
+        camManager[i]->deInit();
+        Config::Camera[i] = oldCamSettings[i];
+        camManager[i]->init();
+    }
+
+    closeDlg();
+}
+
+void CameraSettingsDialog::on_cbCameraSel_currentIndexChanged(int id)
+{
+    if (!previewPanel) return;
+
+    if (currentCam)
+    {
+        currentCam->stop();
+    }
+
+    currentId = id;
+    currentCfg = &Config::Camera[id];
+    //currentCam = camManager[id];
+    currentCam = nullptr;
+    populateCamControls(id);
+    currentCam = camManager[id];
+    previewPanel->setCurrentCam(currentCam);
+
+    currentCam->start();
+}
+
+void CameraSettingsDialog::onChangeInputType(int type)
+{
+    if (!currentCfg) return;
+
+    if (currentCam)
+    {
+        currentCam->stop();
+        currentCam->deInit();
+    }
+
+    currentCfg->InputType = type;
+
+    ui->txtSrcImagePath->setEnabled(type == 1);
+    ui->btnSrcImageBrowse->setEnabled(type == 1);
+    ui->cbPhysicalCamera->setEnabled((type == 2) && (ui->cbPhysicalCamera->count()>0));
+
+    currentCfg->ImagePath = ui->txtSrcImagePath->text().toStdString();
+
+    if (ui->cbPhysicalCamera->count() > 0)
+        currentCfg->CamDeviceName = ui->cbPhysicalCamera->currentData().toString().toStdString();
+
+    if (currentCam)
+    {
+        currentCam->init();
+        currentCam->start();
+    }
+}
+
+void CameraSettingsDialog::on_txtSrcImagePath_textChanged()
+{
+    if (!currentCfg) return;
+
+    if (currentCam)
+    {
+        currentCam->stop();
+        currentCam->deInit();
+    }
+
+    currentCfg->ImagePath = ui->txtSrcImagePath->text().toStdString();
+
+    if (currentCam)
+    {
+        currentCam->init();
+        currentCam->start();
+    }
+}
+
+void CameraSettingsDialog::on_btnSrcImageBrowse_clicked()
+{
+    QString file = QFileDialog::getOpenFileName(this,
+                                                "Select image file...",
+                                                QString::fromStdString(EmuDirectory),
+                                                "Image files (*.png *.jpg *.jpeg *.bmp);;Any file (*.*)");
+
+    if (file.isEmpty()) return;
+
+    ui->txtSrcImagePath->setText(file);
+}
+
+void CameraSettingsDialog::on_cbPhysicalCamera_currentIndexChanged(int id)
+{
+    if (!currentCfg) return;
+
+    if (currentCam)
+    {
+        currentCam->stop();
+        currentCam->deInit();
+    }
+
+    currentCfg->CamDeviceName = ui->cbPhysicalCamera->itemData(id).toString().toStdString();
+
+    if (currentCam)
+    {
+        currentCam->init();
+        currentCam->start();
+    }
+}
+
+void CameraSettingsDialog::populateCamControls(int id)
+{
+    Config::CameraConfig& cfg = Config::Camera[id];
+
+    int type = cfg.InputType;
+    if (type < 0 || type >= grpInputType->buttons().count()) type = 0;
+    grpInputType->button(type)->setChecked(true);
+
+    ui->txtSrcImagePath->setText(QString::fromStdString(cfg.ImagePath));
+
+    bool deviceset = false;
+    QString device = QString::fromStdString(cfg.CamDeviceName);
+    for (int i = 0; i < ui->cbPhysicalCamera->count(); i++)
+    {
+        QString itemdev = ui->cbPhysicalCamera->itemData(i).toString();
+        if (itemdev == device)
+        {
+            ui->cbPhysicalCamera->setCurrentIndex(i);
+            deviceset = true;
+            break;
+        }
+    }
+    if (!deviceset)
+        ui->cbPhysicalCamera->setCurrentIndex(0);
+
+    onChangeInputType(type);
+
+    ui->chkFlipPicture->setChecked(cfg.XFlip);
+}
+
+void CameraSettingsDialog::on_chkFlipPicture_clicked()
+{
+    if (!currentCfg) return;
+
+    currentCfg->XFlip = ui->chkFlipPicture->isChecked();
+    if (currentCam) currentCam->setXFlip(currentCfg->XFlip);
+}
diff --git a/src/frontend/qt_sdl/CameraSettingsDialog.h b/src/frontend/qt_sdl/CameraSettingsDialog.h
new file mode 100644
index 0000000..8572ac4
--- /dev/null
+++ b/src/frontend/qt_sdl/CameraSettingsDialog.h
@@ -0,0 +1,108 @@
+/*
+    Copyright 2016-2022 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef CAMERASETTINGSDIALOG_H
+#define CAMERASETTINGSDIALOG_H
+
+#include <QDialog>
+#include <QButtonGroup>
+
+#include "Config.h"
+#include "CameraManager.h"
+
+namespace Ui { class CameraSettingsDialog; }
+class CameraSettingsDialog;
+
+class CameraPreviewPanel : public QWidget
+{
+    Q_OBJECT
+
+public:
+    CameraPreviewPanel(QWidget* parent);
+    ~CameraPreviewPanel();
+
+    void setCurrentCam(CameraManager* cam)
+    {
+        currentCam = cam;
+    }
+
+protected:
+    void paintEvent(QPaintEvent* event) override;
+    void timerEvent(QTimerEvent* event) override
+    {
+        repaint();
+    }
+
+private:
+    int updateTimer;
+    CameraManager* currentCam;
+};
+
+class CameraSettingsDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit CameraSettingsDialog(QWidget* parent);
+    ~CameraSettingsDialog();
+
+    static CameraSettingsDialog* currentDlg;
+    static CameraSettingsDialog* openDlg(QWidget* parent)
+    {
+        if (currentDlg)
+        {
+            currentDlg->activateWindow();
+            return currentDlg;
+        }
+
+        currentDlg = new CameraSettingsDialog(parent);
+        currentDlg->open();
+        return currentDlg;
+    }
+    static void closeDlg()
+    {
+        currentDlg = nullptr;
+    }
+
+private slots:
+    void on_CameraSettingsDialog_accepted();
+    void on_CameraSettingsDialog_rejected();
+
+    void on_cbCameraSel_currentIndexChanged(int id);
+    void onChangeInputType(int type);
+    void on_txtSrcImagePath_textChanged();
+    void on_btnSrcImageBrowse_clicked();
+    void on_cbPhysicalCamera_currentIndexChanged(int id);
+    void on_chkFlipPicture_clicked();
+
+private:
+    Ui::CameraSettingsDialog* ui;
+
+    QButtonGroup* grpInputType;
+    CameraPreviewPanel* previewPanel;
+
+    int currentId;
+    Config::CameraConfig* currentCfg;
+    CameraManager* currentCam;
+
+    Config::CameraConfig oldCamSettings[2];
+
+    void populateCamControls(int id);
+};
+
+#endif // CAMERASETTINGSDIALOG_H
diff --git a/src/frontend/qt_sdl/CameraSettingsDialog.ui b/src/frontend/qt_sdl/CameraSettingsDialog.ui
new file mode 100644
index 0000000..bbaf45b
--- /dev/null
+++ b/src/frontend/qt_sdl/CameraSettingsDialog.ui
@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>CameraSettingsDialog</class>
+ <widget class="QDialog" name="CameraSettingsDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>605</width>
+    <height>341</height>
+   </rect>
+  </property>
+  <property name="sizePolicy">
+   <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
+  <property name="windowTitle">
+   <string>Camera settings - melonDS</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <property name="sizeConstraint">
+    <enum>QLayout::SetFixedSize</enum>
+   </property>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout" stretch="0,1">
+     <item>
+      <widget class="QLabel" name="label">
+       <property name="text">
+        <string>Configure emulated camera:</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QComboBox" name="cbCameraSel"/>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QGridLayout" name="gridLayout_3">
+     <item row="0" column="0">
+      <widget class="QGroupBox" name="groupBox">
+       <property name="title">
+        <string>Picture source</string>
+       </property>
+       <layout class="QGridLayout" name="gridLayout_2">
+        <item row="1" column="2">
+         <widget class="QLineEdit" name="txtSrcImagePath"/>
+        </item>
+        <item row="0" column="0" colspan="4">
+         <widget class="QRadioButton" name="rbPictureNone">
+          <property name="text">
+           <string>None (blank)</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="3">
+         <widget class="QPushButton" name="btnSrcImageBrowse">
+          <property name="text">
+           <string>Browse...</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="0">
+         <widget class="QRadioButton" name="rbPictureCamera">
+          <property name="text">
+           <string>Physical camera:</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QRadioButton" name="rbPictureImg">
+          <property name="text">
+           <string>Image file:</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="2" colspan="2">
+         <widget class="QComboBox" name="cbPhysicalCamera"/>
+        </item>
+       </layout>
+      </widget>
+     </item>
+     <item row="1" column="0">
+      <widget class="QGroupBox" name="groupBox_3">
+       <property name="title">
+        <string>Picture settings</string>
+       </property>
+       <layout class="QGridLayout" name="gridLayout_4">
+        <item row="0" column="0">
+         <widget class="QCheckBox" name="chkFlipPicture">
+          <property name="text">
+           <string>Flip horizontally</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </widget>
+     </item>
+     <item row="2" column="0">
+      <spacer name="verticalSpacer">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>40</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item row="0" column="2" rowspan="3">
+      <widget class="QGroupBox" name="grpPreview">
+       <property name="title">
+        <string>Preview</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>CameraSettingsDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>CameraSettingsDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>
diff --git a/src/frontend/qt_sdl/Config.cpp b/src/frontend/qt_sdl/Config.cpp
index a8df8ee..8b2f3d4 100644
--- a/src/frontend/qt_sdl/Config.cpp
+++ b/src/frontend/qt_sdl/Config.cpp
@@ -140,6 +140,8 @@ bool DSBatteryLevelOkay;
 int DSiBatteryLevel;
 bool DSiBatteryCharging;
 
+CameraConfig Camera[2];
+
 
 const char* kConfigFile = "melonDS.ini";
 const char* kUniqueConfigFile = "melonDS.%d.ini";
@@ -316,6 +318,17 @@ ConfigEntry ConfigFile[] =
     {"DSiBatteryLevel",    0, &DSiBatteryLevel, 0xF, true},
     {"DSiBatteryCharging", 1, &DSiBatteryCharging, true, true},
 
+    // TODO!!
+    // we need a more elegant way to deal with this
+    {"Camera0_InputType", 0, &Camera[0].InputType, 0, false},
+    {"Camera0_ImagePath", 2, &Camera[0].ImagePath, (std::string)"", false},
+    {"Camera0_CamDeviceName", 2, &Camera[0].CamDeviceName, (std::string)"", false},
+    {"Camera0_XFlip", 1, &Camera[0].XFlip, false, false},
+    {"Camera1_InputType", 0, &Camera[1].InputType, 0, false},
+    {"Camera1_ImagePath", 2, &Camera[1].ImagePath, (std::string)"", false},
+    {"Camera1_CamDeviceName", 2, &Camera[1].CamDeviceName, (std::string)"", false},
+    {"Camera1_XFlip", 1, &Camera[1].XFlip, false, false},
+
     {"", -1, nullptr, 0, false}
 };
 
diff --git a/src/frontend/qt_sdl/Config.h b/src/frontend/qt_sdl/Config.h
index cc6792c..6ccae5f 100644
--- a/src/frontend/qt_sdl/Config.h
+++ b/src/frontend/qt_sdl/Config.h
@@ -61,6 +61,14 @@ struct ConfigEntry
     bool InstanceUnique; // whether the setting can exist individually for each instance in multiplayer
 };
 
+struct CameraConfig
+{
+    int InputType; // 0=blank 1=image 2=camera
+    std::string ImagePath;
+    std::string CamDeviceName;
+    bool XFlip;
+};
+
 
 extern int KeyMapping[12];
 extern int JoyMapping[12];
@@ -175,6 +183,8 @@ extern bool DSBatteryLevelOkay;
 extern int DSiBatteryLevel;
 extern bool DSiBatteryCharging;
 
+extern CameraConfig Camera[2];
+
 
 void Load();
 void Save();
diff --git a/src/frontend/qt_sdl/Platform.cpp b/src/frontend/qt_sdl/Platform.cpp
index 68bdd3e..f9eaf42 100644
--- a/src/frontend/qt_sdl/Platform.cpp
+++ b/src/frontend/qt_sdl/Platform.cpp
@@ -33,6 +33,7 @@
 #include "Platform.h"
 #include "Config.h"
 #include "ROMManager.h"
+#include "CameraManager.h"
 #include "LAN_Socket.h"
 #include "LAN_PCap.h"
 #include "LocalMP.h"
@@ -40,8 +41,11 @@
 
 std::string EmuDirectory;
 
+extern CameraManager* camManager[2];
+
 void emuStop();
 
+
 namespace Platform
 {
 
@@ -99,7 +103,6 @@ void IPCDeInit()
         IPCBuffer->detach();
         delete IPCBuffer;
     }
-
     IPCBuffer = nullptr;
 }
 
@@ -492,8 +495,6 @@ u16 MP_RecvReplies(u8* data, u64 timestamp, u16 aidmask)
     return LocalMP::RecvReplies(data, timestamp, aidmask);
 }
 
-
-
 bool LAN_Init()
 {
     if (Config::DirectLAN)
@@ -537,4 +538,20 @@ int LAN_RecvPacket(u8* data)
         return LAN_Socket::RecvPacket(data);
 }
 
+
+void Camera_Start(int num)
+{
+    return camManager[num]->start();
+}
+
+void Camera_Stop(int num)
+{
+    return camManager[num]->stop();
+}
+
+void Camera_CaptureFrame(int num, u32* frame, int width, int height, bool yuv)
+{
+    return camManager[num]->captureFrame(frame, width, height, yuv);
+}
+
 }
diff --git a/src/frontend/qt_sdl/main.cpp b/src/frontend/qt_sdl/main.cpp
index 97b78fc..a9d0c4d 100644
--- a/src/frontend/qt_sdl/main.cpp
+++ b/src/frontend/qt_sdl/main.cpp
@@ -55,6 +55,7 @@
 #include "EmuSettingsDialog.h"
 #include "InputConfig/InputConfigDialog.h"
 #include "VideoSettingsDialog.h"
+#include "CameraSettingsDialog.h"
 #include "AudioSettingsDialog.h"
 #include "FirmwareSettingsDialog.h"
 #include "PathSettingsDialog.h"
@@ -88,6 +89,7 @@
 
 #include "ROMManager.h"
 #include "ArchiveUtil.h"
+#include "CameraManager.h"
 
 // TODO: uniform variable spelling
 
@@ -115,6 +117,9 @@ u32 micExtBufferWritePos;
 u32 micWavLength;
 s16* micWavBuffer;
 
+CameraManager* camManager[2];
+bool camStarted[2];
+
 const struct { int id; float ratio; const char* label; } aspectRatios[] =
 {
     { 0, 1,                       "4:3 (native)" },
@@ -127,6 +132,7 @@ const struct { int id; float ratio; const char* label; } aspectRatios[] =
 void micCallback(void* data, Uint8* stream, int len);
 
 
+
 void audioCallback(void* data, Uint8* stream, int len)
 {
     len /= (sizeof(s16) * 2);
@@ -1537,6 +1543,9 @@ MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent)
         actVideoSettings = menu->addAction("Video settings");
         connect(actVideoSettings, &QAction::triggered, this, &MainWindow::onOpenVideoSettings);
 
+        actCameraSettings = menu->addAction("Camera settings");
+        connect(actCameraSettings, &QAction::triggered, this, &MainWindow::onOpenCameraSettings);
+
         actAudioSettings = menu->addAction("Audio settings");
         connect(actAudioSettings, &QAction::triggered, this, &MainWindow::onOpenAudioSettings);
 
@@ -2751,6 +2760,27 @@ void MainWindow::onOpenVideoSettings()
     connect(dlg, &VideoSettingsDialog::updateVideoSettings, this, &MainWindow::onUpdateVideoSettings);
 }
 
+void MainWindow::onOpenCameraSettings()
+{
+    emuThread->emuPause();
+
+    camStarted[0] = camManager[0]->isStarted();
+    camStarted[1] = camManager[1]->isStarted();
+    if (camStarted[0]) camManager[0]->stop();
+    if (camStarted[1]) camManager[1]->stop();
+
+    CameraSettingsDialog* dlg = CameraSettingsDialog::openDlg(this);
+    connect(dlg, &CameraSettingsDialog::finished, this, &MainWindow::onCameraSettingsFinished);
+}
+
+void MainWindow::onCameraSettingsFinished(int res)
+{
+    if (camStarted[0]) camManager[0]->start();
+    if (camStarted[1]) camManager[1]->start();
+
+    emuThread->emuUnpause();
+}
+
 void MainWindow::onOpenAudioSettings()
 {
     AudioSettingsDialog* dlg = AudioSettingsDialog::openDlg(this);
@@ -3105,7 +3135,7 @@ bool MelonApplication::event(QEvent *event)
 
 int main(int argc, char** argv)
 {
-    srand(time(NULL));
+    srand(time(nullptr));
 
     printf("melonDS " MELONDS_VERSION "\n");
     printf(MELONDS_URL "\n");
@@ -3195,11 +3225,17 @@ int main(int argc, char** argv)
 
     micDevice = 0;
 
-
     memset(micExtBuffer, 0, sizeof(micExtBuffer));
     micExtBufferWritePos = 0;
     micWavBuffer = nullptr;
 
+    camStarted[0] = false;
+    camStarted[1] = false;
+    camManager[0] = new CameraManager(0, 640, 480, true);
+    camManager[1] = new CameraManager(1, 640, 480, true);
+    camManager[0]->setXFlip(Config::Camera[0].XFlip);
+    camManager[1]->setXFlip(Config::Camera[1].XFlip);
+
     ROMManager::EnableCheats(Config::EnableCheats != 0);
 
     Frontend::Init_Audio(audioFreq);
@@ -3252,6 +3288,9 @@ int main(int argc, char** argv)
 
     if (micWavBuffer) delete[] micWavBuffer;
 
+    delete camManager[0];
+    delete camManager[1];
+
     Config::Save();
 
     SDL_Quit();
diff --git a/src/frontend/qt_sdl/main.h b/src/frontend/qt_sdl/main.h
index 5d03e54..1977b7f 100644
--- a/src/frontend/qt_sdl/main.h
+++ b/src/frontend/qt_sdl/main.h
@@ -266,16 +266,18 @@ private slots:
     void onOpenInputConfig();
     void onInputConfigFinished(int res);
     void onOpenVideoSettings();
+    void onOpenCameraSettings();
+    void onCameraSettingsFinished(int res);
     void onOpenAudioSettings();
-    void onOpenFirmwareSettings();
-    void onOpenPathSettings();
     void onUpdateAudioSettings();
     void onAudioSettingsFinished(int res);
     void onOpenMPSettings();
     void onMPSettingsFinished(int res);
     void onOpenWifiSettings();
     void onWifiSettingsFinished(int res);
+    void onOpenFirmwareSettings();
     void onFirmwareSettingsFinished(int res);
+    void onOpenPathSettings();
     void onPathSettingsFinished(int res);
     void onOpenInterfaceSettings();
     void onInterfaceSettingsFinished(int res);
@@ -359,6 +361,7 @@ public:
     QAction* actPowerManagement;
     QAction* actInputConfig;
     QAction* actVideoSettings;
+    QAction* actCameraSettings;
     QAction* actAudioSettings;
     QAction* actMPSettings;
     QAction* actWifiSettings;