citra_qt: camera integration (#3566)

* Implement camera feature

* Make OpenCVCamera optional

* Fix styling problems

* CI configuration

* Fix CI

* Hopefully final fix

* Hopefully final fix

* Fix all the problems

* Oops..

* Add Qt Multimedia Camera

* Another oops

* Try to fix broken linux CI

* Try to fix broken linux CI

* Fix problems

* Improve UI

* Fix problems

* camera: Add support for Qt <5.10 and fix preview error

* CI: try to fix linux-frozen travis build

* camera: fix problems and add multiple handlers support

* fix CI

* remove most ServiceFramework changes

* Fix format

* Remove last ServiceFramework change

* camera: remove unused interfaces; revert submodule change

* camera: fix CI error

* ci: use ccache for opencv build

* citra_qt: fix configuration error; CI: add mediaservice plugin

* citra_qt: fix clang-format

* citra_qt: fix documentation error

* citra_qt: fix configuration page; camera: fix pausing crash

* citra_qt: fix preview not stopping

* camera: extend handlers length

* camera: fix camera resume error

* camera: fix clang-format

* camera: remove all OpenCV; citra_qt: rewrite configuration

* camera: remove all OpenCV; citra_qt: rewrite configuration

* camera: remove all OpenCV; citra_qt: rewrite configuration

* CI: fix linux ci

* camera: check settings update; citra_qt: fix configuration error

* service_cam: use a better way to apply configuration

* Service_CAM: rewrite camera reload

* cam: fix clang format

* citra_qt: fix argument load issue; camera: base of system camera selection

* citra_qt: Add system camera selection

* camera: fix image upside down, Implement SetFrameRate in Qt Multimedia Camera

* camera: Add missing <array> include, update SetFrameRate and add settings in Qt Multimedia Camera header

* camera: move started in Qt Multimedia Camera header

* QtMultimediaCamera: Move frame rates to SetFrameRate; Set minimum and maximum frame rate

* Update appveyor.yml

src/citra_qt/camera/still_image_camera.h

@@ -0,0 +1,43 @@
+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+#include <QImage>
+#include "citra_qt/camera/camera_util.h"
+#include "citra_qt/camera/qt_camera_factory.h"
+#include "core/frontend/camera/interface.h"
+
+namespace Camera {
+
+class StillImageCamera final : public CameraInterface {
+public:
+    StillImageCamera(QImage image);
+    void StartCapture() override;
+    void StopCapture() override;
+    void SetResolution(const Service::CAM::Resolution&) override;
+    void SetFlip(Service::CAM::Flip) override;
+    void SetEffect(Service::CAM::Effect) override;
+    void SetFormat(Service::CAM::OutputFormat) override;
+    void SetFrameRate(Service::CAM::FrameRate frame_rate) override {}
+    std::vector<u16> ReceiveFrame() override;
+    bool IsPreviewAvailable() override;
+
+private:
+    QImage image;
+    int width, height;
+    bool output_rgb;
+    bool flip_horizontal, flip_vertical;
+};
+
+class StillImageCameraFactory final : public QtCameraFactory {
+public:
+    std::unique_ptr<CameraInterface> Create(const std::string& config) const override;
+
+private:
+    static const std::string getFilePath();
+};
+
+} // namespace Camera