Add experimental torch plugin for top panel

This currently uses the gstreamer code and should be reverted when we
have it working through QtMultimedia.

CMakeLists.txt

@@ -33,6 +33,11 @@ set_package_properties(KF5Wayland PROPERTIES
                        TYPE REQUIRED
                        PURPOSE "Required for interacting with the compositor")
 
+# torch
+find_package(GStreamer 1.1.90 REQUIRED)
+find_package(GLIB2 REQUIRED)
+find_package(GObject REQUIRED)
+
 include(CheckIncludeFiles)
 
 plasma_install_package(look-and-feel org.kde.plasma.phone look-and-feel)

cmake/FindGLIB2.cmake

@@ -0,0 +1,48 @@
+# - Try to find the GLIB2 libraries
+# Once done this will define
+#
+#  GLIB2_FOUND - system has glib2
+#  GLIB2_INCLUDE_DIR - the glib2 include directory
+#  GLIB2_LIBRARIES - glib2 library
+
+# Copyright (c) 2008 Laurent Montel, <montel@kde.org>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+
+if(GLIB2_INCLUDE_DIR AND GLIB2_LIBRARIES)
+    # Already in cache, be silent
+    set(GLIB2_FIND_QUIETLY TRUE)
+endif(GLIB2_INCLUDE_DIR AND GLIB2_LIBRARIES)
+
+if (NOT WIN32)
+   find_package(PkgConfig REQUIRED)
+   pkg_check_modules(PKG_GLIB REQUIRED glib-2.0)
+endif(NOT WIN32)
+
+find_path(GLIB2_MAIN_INCLUDE_DIR glib.h
+          PATH_SUFFIXES glib-2.0
+          PATHS ${PKG_GLIB_INCLUDE_DIRS} )
+
+# search the glibconfig.h include dir under the same root where the library is found
+find_library(GLIB2_LIBRARIES
+             NAMES glib-2.0
+             PATHS ${PKG_GLIB_LIBRARY_DIRS} )
+
+find_path(GLIB2_INTERNAL_INCLUDE_DIR glibconfig.h
+          PATH_SUFFIXES glib-2.0/include ../lib/glib-2.0/include
+          PATHS ${PKG_GLIB_INCLUDE_DIRS} ${PKG_GLIB_LIBRARIES} ${CMAKE_SYSTEM_LIBRARY_PATH})
+
+set(GLIB2_INCLUDE_DIR ${GLIB2_MAIN_INCLUDE_DIR})
+
+# not sure if this include dir is optional or required
+# for now it is optional
+if(GLIB2_INTERNAL_INCLUDE_DIR)
+  set(GLIB2_INCLUDE_DIR ${GLIB2_INCLUDE_DIR} ${GLIB2_INTERNAL_INCLUDE_DIR})
+endif(GLIB2_INTERNAL_INCLUDE_DIR)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(GLIB2  DEFAULT_MSG  GLIB2_LIBRARIES GLIB2_MAIN_INCLUDE_DIR)
+
+mark_as_advanced(GLIB2_INCLUDE_DIR GLIB2_LIBRARIES)

cmake/FindGObject.cmake

@@ -0,0 +1,52 @@
+# - Try to find GObject
+# Once done this will define
+#
+#  GOBJECT_FOUND - system has GObject
+#  GOBJECT_INCLUDE_DIR - the GObject include directory
+#  GOBJECT_LIBRARIES - the libraries needed to use GObject
+#  GOBJECT_DEFINITIONS - Compiler switches required for using GObject
+
+# Copyright (c) 2011, Raphael Kubo da Costa <kubito@gmail.com>
+# Copyright (c) 2006, Tim Beaulen <tbscope@gmail.com>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+FIND_PACKAGE(PkgConfig)
+PKG_CHECK_MODULES(PC_GOBJECT gobject-2.0)
+SET(GOBJECT_DEFINITIONS ${PC_GOBJECT_CFLAGS_OTHER})
+
+FIND_PATH(GOBJECT_INCLUDE_DIR gobject.h
+   HINTS
+   ${PC_GOBJECT_INCLUDEDIR}
+   ${PC_GOBJECT_INCLUDE_DIRS}
+   PATH_SUFFIXES glib-2.0/gobject/
+   )
+
+FIND_LIBRARY(_GObjectLibs NAMES gobject-2.0
+   HINTS
+   ${PC_GOBJECT_LIBDIR}
+   ${PC_GOBJECT_LIBRARY_DIRS}
+   )
+FIND_LIBRARY(_GModuleLibs NAMES gmodule-2.0
+   HINTS
+   ${PC_GOBJECT_LIBDIR}
+   ${PC_GOBJECT_LIBRARY_DIRS}
+   )
+FIND_LIBRARY(_GThreadLibs NAMES gthread-2.0
+   HINTS
+   ${PC_GOBJECT_LIBDIR}
+   ${PC_GOBJECT_LIBRARY_DIRS}
+   )
+FIND_LIBRARY(_GLibs NAMES glib-2.0
+   HINTS
+   ${PC_GOBJECT_LIBDIR}
+   ${PC_GOBJECT_LIBRARY_DIRS}
+   )
+
+SET( GOBJECT_LIBRARIES ${_GObjectLibs} ${_GModuleLibs} ${_GThreadLibs} ${_GLibs} )
+
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(GOBJECT DEFAULT_MSG GOBJECT_LIBRARIES GOBJECT_INCLUDE_DIR)
+
+MARK_AS_ADVANCED(GOBJECT_INCLUDE_DIR _GObjectLibs _GModuleLibs _GThreadLibs _GLibs)

cmake/FindGStreamer.cmake

@@ -0,0 +1,72 @@
+# - Try to find GStreamer
+# Once done this will define
+#
+#  GSTREAMER_FOUND - system has GStreamer
+#  GSTREAMER_INCLUDE_DIR - the GStreamer include directory
+#  GSTREAMER_LIBRARY - the main GStreamer library
+#  GSTREAMER_PLUGIN_DIR - the GStreamer plugin directory
+#
+#  And for all the plugin libraries specified in the COMPONENTS
+#  of find_package, this module will define:
+#
+#  GSTREAMER_<plugin_lib>_LIBRARY_FOUND - system has <plugin_lib>
+#  GSTREAMER_<plugin_lib>_LIBRARY - the <plugin_lib> library
+#  GSTREAMER_<plugin_lib>_INCLUDE_DIR - the <plugin_lib> include directory
+#
+# Copyright(c) 2010, Collabora Ltd.
+#   @author George Kiagiadakis <george.kiagiadakis@collabora.co.uk>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+# TODO: Other versions --> GSTREAMER_X_Y_FOUND(Example: GSTREAMER_0_8_FOUND and GSTREAMER_0_10_FOUND etc)
+
+if(GSTREAMER_INCLUDE_DIR AND GSTREAMER_LIBRARIES AND GSTREAMER_BASE_LIBRARY)
+   # in cache already
+   set(GStreamer_FIND_QUIETLY TRUE)
+else()
+   set(GStreamer_FIND_QUIETLY FALSE)
+endif()
+
+set(GSTREAMER_API_VERSION 1.0)
+if(NOT WIN32)
+   FIND_PACKAGE(PkgConfig REQUIRED)
+   # use pkg-config to get the directories and then use these values
+   # in the FIND_PATH() and FIND_LIBRARY() calls
+   # don't make this check required - otherwise you can't use macro_optional_find_package on this one
+   PKG_CHECK_MODULES(PKG_GSTREAMER gstreamer-${GSTREAMER_API_VERSION})
+   set(GSTREAMER_VERSION ${PKG_GSTREAMER_VERSION})
+   set(GSTREAMER_DEFINITIONS ${PKG_GSTREAMER_CFLAGS})
+endif()
+
+message(STATUS "Found GStreamer package: ${PKG_GSTREAMER_VERSION}")
+
+set(GSTREAMER_INCLUDE_DIR ${PKG_GSTREAMER_INCLUDE_DIRS})
+
+find_library(GSTREAMER_LIBRARIES NAMES gstreamer-${GSTREAMER_API_VERSION}
+   PATHS
+   ${PKG_GSTREAMER_LIBRARY_DIRS}
+   )
+
+find_library(GSTREAMER_BASE_LIBRARY NAMES gstbase-${GSTREAMER_API_VERSION}
+   PATHS
+   ${PKG_GSTREAMER_LIBRARY_DIRS}
+   )
+
+find_library(GSTREAMER_VIDEO_LIBRARY NAMES gstvideo-${GSTREAMER_API_VERSION}
+   PATHS
+   ${PKG_GSTREAMER_LIBRARY_DIRS}
+   )
+
+if(NOT GSTREAMER_INCLUDE_DIR)
+   message(STATUS "GStreamer: WARNING: include dir not found")
+endif()
+
+if(NOT GSTREAMER_LIBRARIES)
+   message(STATUS "GStreamer: WARNING: library not found")
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(GStreamer  DEFAULT_MSG  GSTREAMER_LIBRARIES GSTREAMER_INCLUDE_DIR GSTREAMER_BASE_LIBRARY)
+
+mark_as_advanced(GSTREAMER_INCLUDE_DIR GSTREAMER_LIBRARIES GSTREAMER_BASE_LIBRARY)

containments/panel/CMakeLists.txt

@@ -9,8 +9,10 @@ kcoreaddons_desktop_to_json(plasma_applet_phonepanel package/metadata.desktop)
 target_link_libraries(plasma_applet_phonepanel
                       Qt5::Gui
                       KF5::Plasma
-                      KF5::I18n)
+                      KF5::I18n
+                      ${GSTREAMER_LIBRARIES} ${GLIB2_LIBRARIES} ${GOBJECT_LIBRARIES})
 
+target_include_directories(plasma_applet_phonepanel PRIVATE "${GSTREAMER_INCLUDE_DIR}")
 
 install(TARGETS plasma_applet_phonepanel DESTINATION ${KDE_INSTALL_PLUGINDIR}/plasma/applets)
 #install(FILES plasma-phonepanel-default.desktop DESTINATION ${SERVICES_INSTALL_DIR})

containments/panel/package/contents/ui/quicksettings/QuickSettings.qml

@@ -29,13 +29,18 @@ Item {
         print("toggle airplane mode")
     }
 
+    function toggleTorch() {
+        plasmoid.nativeInterface.toggleTorch()
+    }
+
     function addPlasmoid(applet, id) {
         settingsModel.append({"icon": applet.icon,
                               "text": applet.title,
                               "plasmoidId": id,
                               "enabled": false,
                               "applet": applet,
-                              "settingsCommand": ""})
+                              "settingsCommand": "",
+                              "toggleFunction": ""});
     }
 
     signal plasmoidTriggered(var applet, var id)
@@ -92,6 +97,7 @@ Item {
             "icon": "package_games_puzzle",
             "enabled": false,
             "settingsCommand": "",
+            "toggleFunction": "toggleTorch",
             "plasmoidId": -1,
             "applet": null
         });

containments/panel/phonepanel.cpp

@@ -1,5 +1,6 @@
 /***************************************************************************
  *   Copyright (C) 2015 Marco Martin <mart@kde.org>                        *
+ *   Copyright (C) 2018 Bhushan Shah <bshah@kde.org>                       *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
@@ -38,6 +39,39 @@ void PhonePanel::executeCommand(const QString &command)
     QProcess::startDetached(command);
 }
 
+void PhonePanel::toggleTorch()
+{
+    if (!m_running) {
+        gst_init(NULL, NULL);
+        // create elements
+        m_source = gst_element_factory_make("droidcamsrc", "source");
+        m_sink = gst_element_factory_make("fakesink", "sink");
+        m_pipeline = gst_pipeline_new("torch-pipeline");
+        if (!m_pipeline || !m_source || !m_sink) {
+            qDebug() << "Failed to turn on torch: failed to create elements";
+            return;
+        }
+        gst_bin_add_many(GST_BIN(m_pipeline), m_source, m_sink, NULL);
+        if (gst_element_link(m_source, m_sink) != TRUE) {
+            qDebug() << "Failed to turn on torch: failed to link source and sink";
+            g_object_unref(m_pipeline);
+            return;
+        }
+        g_object_set(m_source, "mode", 2, NULL);
+        g_object_set(m_source, "video-torch", TRUE, NULL);
+        if (gst_element_set_state(m_pipeline, GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) {
+            qDebug() << "Failed to turn on torch: failed to start pipeline";
+            g_object_unref(m_pipeline);
+            return;
+        }
+        m_running = true;
+    } else {
+        gst_element_set_state(m_pipeline, GST_STATE_NULL);
+        gst_object_unref(m_pipeline);
+        m_running = false;
+    }
+}
+
 K_EXPORT_PLASMA_APPLET_WITH_JSON(quicksettings, PhonePanel, "metadata.json")
 
 #include "phonepanel.moc"

containments/panel/phonepanel.h

@@ -24,6 +24,8 @@
 
 #include <Plasma/Containment>
 
+#include <gst/gst.h>
+
 
 class PhonePanel : public Plasma::Containment
 {
@@ -35,9 +37,13 @@ public:
 
 public Q_SLOTS:
     void executeCommand(const QString &command);
+    void toggleTorch();
 
 private:
-
+    GstElement* m_pipeline;
+    GstElement* m_sink;
+    GstElement* m_source;
+    bool m_running = false;
 };
 
 #endif