Add visualizations

.github/workflows/build.yml

@@ -62,6 +62,7 @@ jobs:
             libchromaprint-devel
             fftw3-devel
             libebur128-devel
+            projectM-devel
             desktop-file-utils
             update-desktop-files
             appstream-glib
@@ -78,10 +79,11 @@ jobs:
             qt6-base-common-devel
             qt6-sql-sqlite
             qt6-linguist-devel
+            qt6-openglwidgets-devel
             gtest
             gmock
             sparsehash-devel
-            discord-rpc-devel
+            rapidjson-devel
       - name: Install kdsingleapplication-qt6-devel
         if: matrix.opensuse_version != 'leap:15.6'
         run: zypper -n --gpg-auto-import-keys in kdsingleapplication-qt6-devel
@@ -200,6 +202,7 @@ jobs:
             libchromaprint-devel
             libebur128-devel
             fftw-devel
+            libprojectM-devel
             desktop-file-utils
             libappstream-glib
             hicolor-icon-theme
@@ -207,7 +210,7 @@ jobs:
             gtest-devel
             gmock-devel
             sparsehash-devel
-            discord-rpc-devel
+            rapidjson-devel
       - name: Checkout
         uses: actions/checkout@v6
         with:
@@ -290,6 +293,7 @@ jobs:
           lib64Qt6DBus-devel
           lib64Qt6Gui-devel
           lib64Qt6Widgets-devel
+          lib64Qt6OpenGLWidgets-devel
           lib64Qt6Test-devel
           lib64kdsingleapplication-devel
           lib64xkbcommon-devel
@@ -303,7 +307,7 @@ jobs:
           appstream
           appstream-util
           hicolor-icon-theme
-          discord-rpc-devel
+          rapidjson
       - name: Remove files
         run: rm -rf /usr/lib64/qt6/lib/cmake/Qt6Sql/{Qt6QMYSQL*,Qt6QODBCD*,Qt6QPSQL*,Qt6QIBase*}
       - name: Checkout
@@ -384,6 +388,7 @@ jobs:
           lib64fftw-devel
           lib64dbus-devel
           lib64appstream-devel
+          lib64projectm-devel
           lib64qt6core-devel
           lib64qt6gui-devel
           lib64qt6widgets-devel
@@ -393,13 +398,14 @@ jobs:
           lib64qt6dbus-devel
           lib64qt6help-devel
           lib64qt6test-devel
+          lib64qt6openglwidgets-devel
           lib64sparsehash-devel
           lib64kdsingleapplication-devel
           desktop-file-utils
           appstream-util
           hicolor-icon-theme
           gtest
-          discord-rpc-devel
+          rapidjson
       - name: Build and install KDSingleApplication
         if: matrix.mageia_version == '9'
         run: |
@@ -499,6 +505,7 @@ jobs:
             qt6-tools-dev-tools
             qt6-l10n-tools
             rapidjson-dev
+            libprojectm-dev
       - name: Install KDSingleApplication
         if: matrix.debian_version != 'bookworm'
         run: apt install -y libkdsingleapplication-qt6-dev
@@ -520,7 +527,7 @@ jobs:
       - name: Create Build Environment
         run: cmake -E make_directory build
       - name: Configure CMake
-        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_WERROR=ON -DENABLE_DISCORD_RPC=OFF
+        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_WERROR=ON
       - name: Delete build directory
         run: rm -rf build
       - name: make deb
@@ -595,6 +602,7 @@ jobs:
             qt6-tools-dev-tools
             qt6-l10n-tools
             rapidjson-dev
+            libprojectm-dev
       - name: Install KDSingleApplication
         if: matrix.ubuntu_version != 'noble' && matrix.ubuntu_version != 'plucky'
         run: apt install -y libkdsingleapplication-qt6-dev
@@ -616,7 +624,7 @@ jobs:
       - name: Create Build Environment
         run: cmake -E make_directory build
       - name: Configure CMake
-        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_WERROR=ON -DENABLE_DISCORD_RPC=OFF
+        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_WERROR=ON
       - name: Delete build directory
         run: rm -rf build
       - name: make deb
@@ -692,6 +700,8 @@ jobs:
             gstreamer1.0-alsa
             gstreamer1.0-pulseaudio
             libkdsingleapplication-qt6-dev
+            rapidjson-dev
+            libprojectm-dev
       - name: Install keyboxd
         if: matrix.ubuntu_version == 'noble'
         env:
@@ -711,7 +721,7 @@ jobs:
       - name: Create Build Environment
         run: cmake -E make_directory build
       - name: Configure CMake
-        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_WERROR=ON -DENABLE_DISCORD_RPC=OFF
+        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_WERROR=ON
       - name: Delete build directory
         run: rm -rf build
       - name: Import Ubuntu PPA GPG private key
@@ -755,7 +765,7 @@ jobs:
           set -e
           git config --global --add safe.directory ${GITHUB_WORKSPACE}
           cmake -E make_directory build
-          cmake -S . -B build -DCMAKE_BUILD_TYPE="Debug" -DENABLE_DISCORD_RPC=OFF
+          cmake -S . -B build -DCMAKE_BUILD_TYPE="Debug"
           cmake --build build --config Debug --parallel 4
 
 
@@ -775,7 +785,7 @@ jobs:
       with:
         usesh: true
         mem: 4096
-        prepare: pkg_add git cmake pkgconf boost glib2 qt6-qtbase qt6-qttools sqlite gstreamer1 gstreamer1-plugins-base chromaprint libebur128 taglib libcdio libmtp gdk-pixbuf libgpod fftw3 icu4c kdsingleapplication pulseaudio sparsehash
+        prepare: pkg_add git cmake pkgconf boost glib2 qt6-qtbase qt6-qttools sqlite gstreamer1 gstreamer1-plugins-base chromaprint libebur128 taglib libcdio libmtp gdk-pixbuf libgpod fftw3 icu4c kdsingleapplication pulseaudio sparsehash rapidjson
         run: |
           set -e
           export LDFLAGS="-L/usr/local/lib"

3rdparty/discord-rpc/CMakeLists.txt

@@ -0,0 +1,41 @@
+set(DISCORD_RPC_SOURCES
+  discord_rpc.h
+  discord_register.h
+  discord_rpc.cpp
+  discord_rpc_connection.h
+  discord_rpc_connection.cpp
+  discord_serialization.h
+  discord_serialization.cpp
+  discord_connection.h
+  discord_backoff.h
+  discord_msg_queue.h
+)
+
+if(UNIX)
+  list(APPEND DISCORD_RPC_SOURCES discord_connection_unix.cpp)
+  if(APPLE)
+    list(APPEND DISCORD_RPC_SOURCES discord_register_osx.m)
+    add_definitions(-DDISCORD_OSX)
+  else()
+    list(APPEND DISCORD_RPC_SOURCES discord_register_linux.cpp)
+    add_definitions(-DDISCORD_LINUX)
+  endif()
+endif()
+
+if(WIN32)
+  list(APPEND DISCORD_RPC_SOURCES discord_connection_win.cpp discord_register_win.cpp)
+  add_definitions(-DDISCORD_WINDOWS)
+endif()
+
+add_library(discord-rpc STATIC ${DISCORD_RPC_SOURCES})
+
+if(APPLE)
+  target_link_libraries(discord-rpc PRIVATE "-framework AppKit")
+endif()
+
+if(WIN32)
+  target_link_libraries(discord-rpc PRIVATE psapi advapi32)
+endif()
+
+target_include_directories(discord-rpc SYSTEM PRIVATE ${RapidJSON_INCLUDE_DIRS})
+target_include_directories(discord-rpc PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})

3rdparty/discord-rpc/LICENSE

@@ -0,0 +1,19 @@
+Copyright 2017 Discord, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

3rdparty/discord-rpc/README.md

@@ -0,0 +1,162 @@
+# Discord RPC
+
+## Fork Notice
+
+This library was slightly modified for Strawberry Music Player with some extra features from the new API and shared library support/more unnecessary components removed. The original repository is [here](https://github.com/discord/discord-rpc)
+
+## Deprecation Notice
+
+This library has been deprecated in favor of Discord's GameSDK. [Learn more here](https://discordapp.com/developers/docs/game-sdk/sdk-starter-guide)
+
+---
+
+This is a library for interfacing your game with a locally running Discord desktop client. It's known to work on Windows, macOS, and Linux. You can use the lib directly if you like, or use it as a guide to writing your own if it doesn't suit your game as is. PRs/feedback welcome if you have an improvement everyone might want, or can describe how this doesn't meet your needs.
+
+Included here are some quick demos that implement the very minimal subset to show current status, and
+have callbacks for where a more complete game would do more things (joining, spectating, etc).
+
+## Documentation
+
+The most up to date documentation for Rich Presence can always be found on our [developer site](https://discordapp.com/developers/docs/rich-presence/how-to)! If you're interested in rolling your own native implementation of Rich Presence via IPC sockets instead of using our SDK—hey, you've got free time, right?—check out the ["Hard Mode" documentation](https://github.com/discordapp/discord-rpc/blob/master/documentation/hard-mode.md).
+
+## Basic Usage
+
+Zeroith, you should be set up to build things because you are a game developer, right?
+
+First, head on over to the [Discord developers site](https://discordapp.com/developers/applications/me) and make yourself an app. Keep track of `Client ID` -- you'll need it here to pass to the init function.
+
+### Unreal Engine 4 Setup
+
+To use the Rich Presense plugin with Unreal Engine Projects:
+
+1.  Download the latest [release](https://github.com/discordapp/discord-rpc/releases) for each operating system you are targeting and the zipped source code
+2.  In the source code zip, copy the UE plugin—`examples/unrealstatus/Plugins/discordrpc`—to your project's plugin directory
+3.  At `[YOUR_UE_PROJECT]/Plugins/discordrpc/source/ThirdParty/DiscordRpcLibrary/`, create an `Include` folder and copy `discord_rpc.h` and `discord_register.h` to it from the zip
+4.  Follow the steps below for each OS
+5.  Build your UE4 project
+6.  Launch the editor, and enable the Discord plugin.
+
+#### Windows
+
+- At `[YOUR_UE_PROJECT]/Plugins/discordrpc/source/ThirdParty/DiscordRpcLibrary/`, create a `Win64` folder
+- Copy `lib/discord-rpc.lib` and `bin/discord-rpc.dll` from `[RELEASE_ZIP]/win64-dynamic` to the `Win64` folder
+
+#### Mac
+
+- At `[YOUR_UE_PROJECT]/Plugins/discordrpc/source/ThirdParty/DiscordRpcLibrary/`, create a `Mac` folder
+- Copy `libdiscord-rpc.dylib` from `[RELEASE_ZIP]/osx-dynamic/lib` to the `Mac` folder
+
+#### Linux
+
+- At `[YOUR_UE_PROJECT]/Plugins/discordrpc/source/ThirdParty/DiscordRpcLibrary/`, create a `Linux` folder
+- Inside, create another folder `x86_64-unknown-linux-gnu`
+- Copy `libdiscord-rpc.so` from `[RELEASE_ZIP]/linux-dynamic/lib` to `Linux/x86_64-unknown-linux-gnu`
+
+### Unity Setup
+
+If you're a Unity developer looking to integrate Rich Presence into your game, follow this simple guide to get started towards success:
+
+1. Download the DLLs for any platform that you need from [our releases](https://github.com/discordapp/discord-rpc/releases)
+2. In your Unity project, create a `Plugins` folder inside your `Assets` folder if you don't already have one
+3. Copy the file `DiscordRpc.cs` from [here](https://github.com/discordapp/discord-rpc/blob/master/examples/button-clicker/Assets/DiscordRpc.cs) into your `Assets` folder. This is basically your header file for the SDK
+
+We've got our `Plugins` folder ready, so let's get platform-specific!
+
+#### Windows
+
+4. Create `x86` and `x86_64` folders inside `Assets/Plugins/`
+5. Copy `discord-rpc-win/win64-dynamic/bin/discord-rpc.dll` to `Assets/Plugins/x86_64/`
+6. Copy `discord-rpc-win/win32-dynamic/bin/discord-rpc.dll` to `Assets/Plugins/x86/`
+7. Click on both DLLs and make sure they are targetting the correct architectures in the Unity editor properties pane
+8. Done!
+
+#### MacOS
+
+4. Copy `discord-rpc-osx/osx-dynamic/lib/libdiscord-rpc.dylib` to `Assets/Plugins/`
+5. Rename `libdiscord-rpc.dylib` to `discord-rpc.bundle`
+6. Done!
+
+#### Linux
+
+4. Copy `discord-rpc-linux/linux-dynamic-lib/libdiscord-rpc.so` to `Assets/Plugins/`
+5. Done!
+
+You're ready to roll! For code examples on how to interact with the SDK using the `DiscordRpc.cs` header file, check out [our example](https://github.com/discordapp/discord-rpc/blob/master/examples/button-clicker/Assets/DiscordController.cs)
+
+### From package
+
+Download a release package for your platform(s) -- they have subdirs with various prebuilt options, select the one you need add `/include` to your compile includes, `/lib` to your linker paths, and link with `discord-rpc`. For the dynamically linked builds, you'll need to ship the associated file along with your game.
+
+### From repo
+
+First-eth, you'll want `CMake`. There's a few different ways to install it on your system, and you should refer to [their website](https://cmake.org/install/). Many package managers provide ways of installing CMake as well.
+
+To make sure it's installed correctly, type `cmake --version` into your flavor of terminal/cmd. If you get a response with a version number, you're good to go!
+
+There's a [CMake](https://cmake.org/download/) file that should be able to generate the lib for you; Sometimes I use it like this:
+
+```sh
+    cd <path to discord-rpc>
+    mkdir build
+    cd build
+    cmake .. -DCMAKE_INSTALL_PREFIX=<path to install discord-rpc to>
+    cmake --build . --config Release --target install
+```
+
+There is a wrapper build script `build.py` that runs `cmake` with a few different options.
+
+Usually, I run `build.py` to get things started, then use the generated project files as I work on things. It does depend on `click` library, so do a quick `pip install click` to make sure you have it if you want to run `build.py`.
+
+There are some CMake options you might care about:
+
+| flag                                                                                     | default | does                                                                                                                                                  |
+| ---------------------------------------------------------------------------------------- | ------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `ENABLE_IO_THREAD`                                                                       | `ON`    | When enabled, we start up a thread to do io processing, if disabled you should call `Discord_UpdateConnection` yourself.                              |
+| `USE_STATIC_CRT`                                                                         | `OFF`   | (Windows) Enable to statically link the CRT, avoiding requiring users install the redistributable package. (The prebuilt binaries enable this option) |
+| [`BUILD_SHARED_LIBS`](https://cmake.org/cmake/help/v3.7/variable/BUILD_SHARED_LIBS.html) | `OFF`   | Build library as a DLL                                                                                                                                |
+| `WARNINGS_AS_ERRORS`                                                                     | `OFF`   | When enabled, compiles with `-Werror` (on \*nix platforms).                                                                                           |
+
+## Continuous Builds
+
+Why do we have three of these? Three times the fun!
+
+| CI                   | badge                                                                                                                                            |
+| -------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ |
+| TravisCI             | [![Build status](https://travis-ci.org/discordapp/discord-rpc.svg?branch=master)](https://travis-ci.org/discordapp/discord-rpc)                  |
+| AppVeyor             | [![Build status](https://ci.appveyor.com/api/projects/status/qvkoc0w1c4f4b8tj?svg=true)](https://ci.appveyor.com/project/crmarsh/discord-rpc)    |
+| Buildkite (internal) | [![Build status](https://badge.buildkite.com/e103d79d247f6776605a15246352a04b8fd83d69211b836111.svg)](https://buildkite.com/discord/discord-rpc) |
+
+## Sample: send-presence
+
+This is a text adventure "game" that inits/deinits the connection to Discord, and sends a presence update on each command.
+
+## Sample: button-clicker
+
+This is a sample [Unity](https://unity3d.com/) project that wraps a DLL version of the library, and sends presence updates when you click on a button. Run `python build.py unity` in the root directory to build the correct library files and place them in their respective folders.
+
+## Sample: unrealstatus
+
+This is a sample [Unreal](https://www.unrealengine.com) project that wraps the DLL version of the library with an Unreal plugin, exposes a blueprint class for interacting with it, and uses that to make a very simple UI. Run `python build.py unreal` in the root directory to build the correct library files and place them in their respective folders.
+
+## Wrappers and Implementations
+
+Below is a table of unofficial, community-developed wrappers for and implementations of Rich Presence in various languages. If you would like to have yours added, please make a pull request adding your repository to the table. The repository should include:
+
+- The code
+- A brief ReadMe of how to use it
+- A working example
+
+###### Rich Presence Wrappers and Implementations
+
+| Name                                                                      | Language                          |
+| ------------------------------------------------------------------------- | --------------------------------- |
+| [Discord RPC C#](https://github.com/Lachee/discord-rpc-csharp)            | C#                                |
+| [Discord RPC D](https://github.com/voidblaster/discord-rpc-d)             | [D](https://dlang.org/)           |
+| [discord-rpc.jar](https://github.com/Vatuu/discord-rpc 'Discord-RPC.jar') | Java                              |
+| [java-discord-rpc](https://github.com/MinnDevelopment/java-discord-rpc)   | Java                              |
+| [Discord-IPC](https://github.com/jagrosh/DiscordIPC)                      | Java                              |
+| [Discord Rich Presence](https://npmjs.org/discord-rich-presence)          | JavaScript                        |
+| [drpc4k](https://github.com/Bluexin/drpc4k)                               | [Kotlin](https://kotlinlang.org/) |
+| [lua-discordRPC](https://github.com/pfirsich/lua-discordRPC)              | LuaJIT (FFI)                      |
+| [pypresence](https://github.com/qwertyquerty/pypresence)                  | [Python](https://python.org/)     |
+| [SwordRPC](https://github.com/Azoy/SwordRPC)                              | [Swift](https://swift.org)        |

3rdparty/discord-rpc/discord_backoff.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef DISCORD_BACKOFF_H
+#define DISCORD_BACKOFF_H
+
+#include <algorithm>
+#include <random>
+#include <cstdint>
+#include <ctime>
+
+namespace discord_rpc {
+
+struct Backoff {
+  int64_t minAmount;
+  int64_t maxAmount;
+  int64_t current;
+  int fails;
+  std::mt19937_64 randGenerator;
+  std::uniform_real_distribution<> randDistribution;
+
+  double rand01() { return randDistribution(randGenerator); }
+
+  Backoff(int64_t min, int64_t max)
+      : minAmount(min), maxAmount(max), current(min), fails(0), randGenerator(static_cast<uint64_t>(time(0))) {
+  }
+
+  void reset() {
+    fails = 0;
+    current = minAmount;
+  }
+
+  int64_t nextDelay() {
+    ++fails;
+    int64_t delay = static_cast<int64_t>(static_cast<double>(current) * 2.0 * rand01());
+    current = std::min(current + delay, maxAmount);
+    return current;
+  }
+};
+
+}  // namespace discord_rpc
+
+#endif  // DISCORD_BACKOFF_H

3rdparty/discord-rpc/discord_connection.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef DISCORD_CONNECTION_H
+#define DISCORD_CONNECTION_H
+
+// This is to wrap the platform specific kinds of connect/read/write.
+
+#include <cstdlib>
+
+namespace discord_rpc {
+
+// not really connectiony, but need per-platform
+int GetProcessId();
+
+struct BaseConnection {
+  static BaseConnection *Create();
+  static void Destroy(BaseConnection*&);
+  bool isOpen = false;
+  bool Open();
+  bool Close();
+  bool Write(const void *data, size_t length);
+  bool Read(void *data, size_t length);
+};
+
+}  // namespace discord_rpc
+
+#endif  // DISCORD_CONNECTION_H

3rdparty/discord-rpc/discord_connection_unix.cpp

@@ -0,0 +1,160 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include "discord_connection.h"
+
+#include <cerrno>
+#include <fcntl.h>
+#include <cstdio>
+#include <cstring>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/un.h>
+#include <unistd.h>
+
+namespace discord_rpc {
+
+int GetProcessId() {
+  return ::getpid();
+}
+
+struct BaseConnectionUnix : public BaseConnection {
+  int sock{ -1 };
+};
+
+static BaseConnectionUnix Connection;
+static sockaddr_un PipeAddr{};
+#ifdef MSG_NOSIGNAL
+static int MsgFlags = MSG_NOSIGNAL;
+#else
+static int MsgFlags = 0;
+#endif
+
+static const char *GetTempPath() {
+
+  const char *temp = getenv("XDG_RUNTIME_DIR");
+  temp = temp ? temp : getenv("TMPDIR");
+  temp = temp ? temp : getenv("TMP");
+  temp = temp ? temp : getenv("TEMP");
+  temp = temp ? temp : "/tmp";
+
+  return temp;
+
+}
+
+BaseConnection *BaseConnection::Create() {
+  PipeAddr.sun_family = AF_UNIX;
+  return &Connection;
+}
+
+void BaseConnection::Destroy(BaseConnection *&c) {
+
+  auto self = reinterpret_cast<BaseConnectionUnix*>(c);
+  self->Close();
+  c = nullptr;
+
+}
+
+bool BaseConnection::Open() {
+
+  const char *tempPath = GetTempPath();
+  auto self = reinterpret_cast<BaseConnectionUnix*>(this);
+  self->sock = socket(AF_UNIX, SOCK_STREAM, 0);
+  if (self->sock == -1) {
+    return false;
+  }
+  fcntl(self->sock, F_SETFL, O_NONBLOCK);
+#ifdef SO_NOSIGPIPE
+  int optval = 1;
+  setsockopt(self->sock, SOL_SOCKET, SO_NOSIGPIPE, &optval, sizeof(optval));
+#endif
+
+  for (int pipeNum = 0; pipeNum < 10; ++pipeNum) {
+    snprintf(PipeAddr.sun_path, sizeof(PipeAddr.sun_path), "%s/discord-ipc-%d", tempPath, pipeNum);
+    int err = connect(self->sock, reinterpret_cast<const sockaddr*>(&PipeAddr), sizeof(PipeAddr));
+    if (err == 0) {
+      self->isOpen = true;
+      return true;
+    }
+  }
+  self->Close();
+
+  return false;
+
+}
+
+bool BaseConnection::Close() {
+
+  auto self = reinterpret_cast<BaseConnectionUnix*>(this);
+  if (self->sock == -1) {
+    return false;
+  }
+  close(self->sock);
+  self->sock = -1;
+  self->isOpen = false;
+
+  return true;
+
+}
+
+bool BaseConnection::Write(const void *data, size_t length) {
+
+  auto self = reinterpret_cast<BaseConnectionUnix*>(this);
+
+  if (self->sock == -1) {
+    return false;
+  }
+
+  ssize_t sentBytes = send(self->sock, data, length, MsgFlags);
+  if (sentBytes < 0) {
+    Close();
+  }
+
+  return sentBytes == static_cast<ssize_t>(length);
+
+}
+
+bool BaseConnection::Read(void *data, size_t length) {
+
+  auto self = reinterpret_cast<BaseConnectionUnix*>(this);
+
+  if (self->sock == -1) {
+    return false;
+  }
+
+  long res = recv(self->sock, data, length, MsgFlags);
+  if (res < 0) {
+    if (errno == EAGAIN) {
+      return false;
+    }
+    Close();
+  }
+  else if (res == 0) {
+    Close();
+  }
+
+  return static_cast<size_t>(res) == length;
+
+}
+
+}  // namespace discord_rpc

3rdparty/discord-rpc/discord_connection_win.cpp

@@ -0,0 +1,160 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include "discord_connection.h"
+
+#define WIN32_LEAN_AND_MEAN
+#define NOMCX
+#define NOSERVICE
+#define NOIME
+
+#include <cassert>
+#include <windows.h>
+
+namespace discord_rpc {
+
+int GetProcessId() {
+  return static_cast<int>(::GetCurrentProcessId());
+}
+
+struct BaseConnectionWin : public BaseConnection {
+  HANDLE pipe{ INVALID_HANDLE_VALUE };
+};
+
+static BaseConnectionWin Connection;
+
+BaseConnection *BaseConnection::Create() {
+  return &Connection;
+}
+
+void BaseConnection::Destroy(BaseConnection *&c) {
+
+  auto self = reinterpret_cast<BaseConnectionWin*>(c);
+  self->Close();
+  c = nullptr;
+
+}
+
+bool BaseConnection::Open() {
+
+  wchar_t pipeName[]{ L"\\\\?\\pipe\\discord-ipc-0" };
+  const size_t pipeDigit = sizeof(pipeName) / sizeof(wchar_t) - 2;
+  pipeName[pipeDigit] = L'0';
+  auto self = reinterpret_cast<BaseConnectionWin*>(this);
+  for (;;) {
+    self->pipe = ::CreateFileW(pipeName, GENERIC_READ | GENERIC_WRITE, 0, nullptr, OPEN_EXISTING, 0, nullptr);
+    if (self->pipe != INVALID_HANDLE_VALUE) {
+      self->isOpen = true;
+      return true;
+    }
+
+    auto lastError = GetLastError();
+    if (lastError == ERROR_FILE_NOT_FOUND) {
+      if (pipeName[pipeDigit] < L'9') {
+        pipeName[pipeDigit]++;
+        continue;
+      }
+    }
+    else if (lastError == ERROR_PIPE_BUSY) {
+      if (!WaitNamedPipeW(pipeName, 10000)) {
+        return false;
+      }
+      continue;
+    }
+    return false;
+  }
+
+}
+
+bool BaseConnection::Close() {
+
+  auto self = reinterpret_cast<BaseConnectionWin*>(this);
+  ::CloseHandle(self->pipe);
+  self->pipe = INVALID_HANDLE_VALUE;
+  self->isOpen = false;
+
+  return true;
+
+}
+
+bool BaseConnection::Write(const void *data, size_t length) {
+
+  if (length == 0) {
+    return true;
+  }
+  auto self = reinterpret_cast<BaseConnectionWin*>(this);
+  assert(self);
+  if (!self) {
+    return false;
+  }
+  if (self->pipe == INVALID_HANDLE_VALUE) {
+    return false;
+  }
+  assert(data);
+  if (!data) {
+    return false;
+  }
+  const DWORD bytesLength = static_cast<DWORD>(length);
+  DWORD bytesWritten = 0;
+
+  return ::WriteFile(self->pipe, data, bytesLength, &bytesWritten, nullptr) == TRUE && bytesWritten == bytesLength;
+
+}
+
+bool BaseConnection::Read(void *data, size_t length) {
+
+  assert(data);
+  if (!data) {
+    return false;
+  }
+  auto self = reinterpret_cast<BaseConnectionWin*>(this);
+  assert(self);
+  if (!self) {
+    return false;
+  }
+  if (self->pipe == INVALID_HANDLE_VALUE) {
+    return false;
+  }
+  DWORD bytesAvailable = 0;
+  if (::PeekNamedPipe(self->pipe, nullptr, 0, nullptr, &bytesAvailable, nullptr)) {
+    if (bytesAvailable >= length) {
+      DWORD bytesToRead = static_cast<DWORD>(length);
+      DWORD bytesRead = 0;
+      if (::ReadFile(self->pipe, data, bytesToRead, &bytesRead, nullptr) == TRUE) {
+        assert(bytesToRead == bytesRead);
+        return true;
+      }
+      else {
+        Close();
+      }
+    }
+  }
+  else {
+    Close();
+  }
+
+  return false;
+
+}
+
+}  // namespace discord_rpc

3rdparty/discord-rpc/discord_msg_queue.h

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef DISCORD_MSG_QUEUE_H
+#define DISCORD_MSG_QUEUE_H
+
+#include <atomic>
+
+// A simple queue. No locks, but only works with a single thread as producer and a single thread as
+// a consumer. Mutex up as needed.
+
+namespace discord_rpc {
+
+template<typename ElementType, std::size_t QueueSize>
+class MsgQueue {
+  ElementType queue_[QueueSize];
+  std::atomic_uint nextAdd_{ 0 };
+  std::atomic_uint nextSend_{ 0 };
+  std::atomic_uint pendingSends_{ 0 };
+
+ public:
+  MsgQueue() {}
+
+  ElementType *GetNextAddMessage() {
+    // if we are falling behind, bail
+    if (pendingSends_.load() >= QueueSize) {
+      return nullptr;
+    }
+    auto index = (nextAdd_++) % QueueSize;
+    return &queue_[index];
+  }
+  void CommitAdd() { ++pendingSends_; }
+
+  bool HavePendingSends() const { return pendingSends_.load() != 0; }
+  ElementType *GetNextSendMessage() {
+    auto index = (nextSend_++) % QueueSize;
+    return &queue_[index];
+  }
+  void CommitSend() { --pendingSends_; }
+};
+
+}  // namespace discord_rpc
+
+#endif  // DISCORD_MSG_QUEUE_H

3rdparty/discord-rpc/discord_register.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef DISCORD_REGISTER_H
+#define DISCORD_REGISTER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void Discord_Register(const char *applicationId, const char *command);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // DISCORD_REGISTER_H

3rdparty/discord-rpc/discord_register_linux.cpp

@@ -0,0 +1,120 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include "discord_rpc.h"
+#include "discord_register.h"
+
+#include <cstdio>
+#include <errno.h>
+#include <cstdlib>
+#include <cstring>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+namespace {
+
+static bool Mkdir(const char *path) {
+  int result = mkdir(path, 0755);
+  if (result == 0) {
+    return true;
+  }
+  if (errno == EEXIST) {
+    return true;
+  }
+  return false;
+}
+
+}  // namespace
+
+// We want to register games so we can run them from Discord client as discord-<appid>://
+extern "C" void Discord_Register(const char *applicationId, const char *command) {
+
+  // Add a desktop file and update some mime handlers so that xdg-open does the right thing.
+
+  const char *home = getenv("HOME");
+  if (!home) {
+    return;
+  }
+
+  char exePath[1024]{};
+  if (!command || !command[0]) {
+    const ssize_t size = readlink("/proc/self/exe", exePath, sizeof(exePath));
+    if (size <= 0 || size >= static_cast<ssize_t>(sizeof(exePath))) {
+      return;
+    }
+    exePath[size] = '\0';
+    command = exePath;
+  }
+
+  constexpr char desktopFileFormat[] = "[Desktop Entry]\n"
+                                       "Name=Game %s\n"
+                                       "Exec=%s %%u\n"  // note: it really wants that %u in there
+                                       "Type=Application\n"
+                                       "NoDisplay=true\n"
+                                       "Categories=Discord;Games;\n"
+                                       "MimeType=x-scheme-handler/discord-%s;\n";
+  char desktopFile[2048]{};
+  int fileLen = snprintf(desktopFile, sizeof(desktopFile), desktopFileFormat, applicationId, command, applicationId);
+  if (fileLen <= 0) {
+    return;
+  }
+
+  char desktopFilename[256]{};
+  (void)snprintf(desktopFilename, sizeof(desktopFilename), "/discord-%s.desktop", applicationId);
+
+  char desktopFilePath[1024]{};
+  (void)snprintf(desktopFilePath, sizeof(desktopFilePath), "%s/.local", home);
+  if (!Mkdir(desktopFilePath)) {
+    return;
+  }
+  strcat(desktopFilePath, "/share");
+  if (!Mkdir(desktopFilePath)) {
+    return;
+  }
+  strcat(desktopFilePath, "/applications");
+  if (!Mkdir(desktopFilePath)) {
+    return;
+  }
+  strcat(desktopFilePath, desktopFilename);
+
+  FILE *fp = fopen(desktopFilePath, "w");
+  if (fp) {
+    fwrite(desktopFile, 1, fileLen, fp);
+    fclose(fp);
+  }
+  else {
+    return;
+  }
+
+  char xdgMimeCommand[1024]{};
+  snprintf(xdgMimeCommand,
+           sizeof(xdgMimeCommand),
+           "xdg-mime default discord-%s.desktop x-scheme-handler/discord-%s",
+           applicationId,
+           applicationId);
+  if (system(xdgMimeCommand) < 0) {
+    fprintf(stderr, "Failed to register mime handler\n");
+  }
+
+}

3rdparty/discord-rpc/discord_register_osx.m

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <stdio.h>
+#include <sys/stat.h>
+
+#import <AppKit/AppKit.h>
+
+#include "discord_register.h"
+
+static void RegisterCommand(const char *applicationId, const char *command) {
+
+  // There does not appear to be a way to register arbitrary commands on OSX, so instead we'll save the command
+  // to a file in the Discord config path, and when it is needed, Discord can try to load the file there, open
+  // the command therein (will pass to js's window.open, so requires a url-like thing)
+
+  // Note: will not work for sandboxed apps
+  NSString *home = NSHomeDirectory();
+  if (!home) {
+    return;
+  }
+
+  NSString *path = [[[[[[home stringByAppendingPathComponent:@"Library"]
+                              stringByAppendingPathComponent:@"Application Support"]
+                              stringByAppendingPathComponent:@"discord"]
+                              stringByAppendingPathComponent:@"games"]
+                              stringByAppendingPathComponent:[NSString stringWithUTF8String:applicationId]]
+                              stringByAppendingPathExtension:@"json"];
+  [[NSFileManager defaultManager] createDirectoryAtPath:[path stringByDeletingLastPathComponent] withIntermediateDirectories:YES attributes:nil error:nil];
+
+  NSString *jsonBuffer = [NSString stringWithFormat:@"{\"command\": \"%s\"}", command];
+  [jsonBuffer writeToFile:path atomically:NO encoding:NSUTF8StringEncoding error:nil];
+
+}
+
+static void RegisterURL(const char *applicationId) {
+
+  char url[256];
+  snprintf(url, sizeof(url), "discord-%s", applicationId);
+  CFStringRef cfURL = CFStringCreateWithCString(NULL, url, kCFStringEncodingUTF8);
+
+  NSString* myBundleId = [[NSBundle mainBundle] bundleIdentifier];
+  if (!myBundleId) {
+    fprintf(stderr, "No bundle id found\n");
+    return;
+  }
+
+  NSURL* myURL = [[NSBundle mainBundle] bundleURL];
+  if (!myURL) {
+    fprintf(stderr, "No bundle url found\n");
+    return;
+  }
+
+  OSStatus status = LSSetDefaultHandlerForURLScheme(cfURL, (__bridge CFStringRef)myBundleId);
+  if (status != noErr) {
+    fprintf(stderr, "Error in LSSetDefaultHandlerForURLScheme: %d\n", (int)status);
+    return;
+  }
+
+  status = LSRegisterURL((__bridge CFURLRef)myURL, true);
+  if (status != noErr) {
+    fprintf(stderr, "Error in LSRegisterURL: %d\n", (int)status);
+  }
+
+}
+
+void Discord_Register(const char *applicationId, const char *command) {
+
+  if (command) {
+    RegisterCommand(applicationId, command);
+  }
+  else {
+    // raii lite
+    @autoreleasepool {
+      RegisterURL(applicationId);
+    }
+  }
+
+}

3rdparty/discord-rpc/discord_register_win.cpp

@@ -0,0 +1,165 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include "discord_rpc.h"
+#include "discord_register.h"
+
+#define WIN32_LEAN_AND_MEAN
+#define NOMCX
+#define NOSERVICE
+#define NOIME
+
+#include <windows.h>
+#include <psapi.h>
+#include <cstdio>
+
+/**
+ * Updated fixes for MinGW and WinXP
+ * This block is written the way it does not involve changing the rest of the code
+ * Checked to be compiling
+ * 1) strsafe.h belongs to Windows SDK and cannot be added to MinGW
+ * #include guarded, functions redirected to <string.h> substitutes
+ * 2) RegSetKeyValueW and LSTATUS are not declared in <winreg.h>
+ * The entire function is rewritten
+ */
+#ifdef __MINGW32__
+#  include <wchar.h>
+/// strsafe.h fixes
+static HRESULT StringCbPrintfW(LPWSTR pszDest, size_t cbDest, LPCWSTR pszFormat, ...) {
+  HRESULT ret;
+  va_list va;
+  va_start(va, pszFormat);
+  cbDest /= 2;  // Size is divided by 2 to convert from bytes to wide characters - causes segfault
+                // othervise
+  ret = vsnwprintf(pszDest, cbDest, pszFormat, va);
+  pszDest[cbDest - 1] = 0;  // Terminate the string in case a buffer overflow; -1 will be returned
+  va_end(va);
+  return ret;
+}
+#else
+#  include <cwchar>
+#  include <strsafe.h>
+#endif  // __MINGW32__
+
+/// winreg.h fixes
+#ifndef LSTATUS
+#  define LSTATUS LONG
+#endif
+#ifdef RegSetKeyValueW
+#  undefine RegSetKeyValueW
+#endif
+#define RegSetKeyValueW regset
+
+static LSTATUS regset(HKEY hkey, LPCWSTR subkey, LPCWSTR name, DWORD type, const void *data, DWORD len) {
+
+  HKEY htkey = hkey, hsubkey = nullptr;
+  LSTATUS ret;
+  if (subkey && subkey[0]) {
+    if ((ret = RegCreateKeyExW(hkey, subkey, 0, 0, 0, KEY_ALL_ACCESS, 0, &hsubkey, 0)) !=
+        ERROR_SUCCESS)
+      return ret;
+    htkey = hsubkey;
+  }
+  ret = RegSetValueExW(htkey, name, 0, type, static_cast<const BYTE*>(data), len);
+  if (hsubkey && hsubkey != hkey)
+    RegCloseKey(hsubkey);
+  return ret;
+
+}
+
+static void Discord_RegisterW(const wchar_t *applicationId, const wchar_t *command) {
+
+  // https://msdn.microsoft.com/en-us/library/aa767914(v=vs.85).aspx
+  // we want to register games so we can run them as discord-<appid>://
+  // Update the HKEY_CURRENT_USER, because it doesn't seem to require special permissions.
+
+  wchar_t exeFilePath[MAX_PATH]{};
+  DWORD exeLen = GetModuleFileNameW(nullptr, exeFilePath, MAX_PATH);
+  wchar_t openCommand[1024]{};
+
+  if (command && command[0]) {
+    StringCbPrintfW(openCommand, sizeof(openCommand), L"%s", command);
+  }
+  else {
+    // StringCbCopyW(openCommand, sizeof(openCommand), exeFilePath);
+    StringCbPrintfW(openCommand, sizeof(openCommand), L"%s", exeFilePath);
+  }
+
+  wchar_t protocolName[64]{};
+  StringCbPrintfW(protocolName, sizeof(protocolName), L"discord-%s", applicationId);
+  wchar_t protocolDescription[128]{};
+  StringCbPrintfW(protocolDescription, sizeof(protocolDescription), L"URL:Run game %s protocol", applicationId);
+  wchar_t urlProtocol = 0;
+
+  wchar_t keyName[256]{};
+  StringCbPrintfW(keyName, sizeof(keyName), L"Software\\Classes\\%s", protocolName);
+  HKEY key;
+  auto status = RegCreateKeyExW(HKEY_CURRENT_USER, keyName, 0, nullptr, 0, KEY_WRITE, nullptr, &key, nullptr);
+  if (status != ERROR_SUCCESS) {
+    fprintf(stderr, "Error creating key\n");
+    return;
+  }
+  DWORD len;
+  LSTATUS result;
+  len = static_cast<DWORD>(lstrlenW(protocolDescription) + 1);
+  result = RegSetKeyValueW(key, nullptr, nullptr, REG_SZ, protocolDescription, len * sizeof(wchar_t));
+  if (FAILED(result)) {
+    fprintf(stderr, "Error writing description\n");
+  }
+
+  len = static_cast<DWORD>(lstrlenW(protocolDescription) + 1);
+  result = RegSetKeyValueW(key, nullptr, L"URL Protocol", REG_SZ, &urlProtocol, sizeof(wchar_t));
+  if (FAILED(result)) {
+    fprintf(stderr, "Error writing description\n");
+  }
+
+  result = RegSetKeyValueW(key, L"DefaultIcon", nullptr, REG_SZ, exeFilePath, (exeLen + 1) * sizeof(wchar_t));
+  if (FAILED(result)) {
+    fprintf(stderr, "Error writing icon\n");
+  }
+
+  len = static_cast<DWORD>(lstrlenW(openCommand) + 1);
+  result = RegSetKeyValueW(key, L"shell\\open\\command", nullptr, REG_SZ, openCommand, len * sizeof(wchar_t));
+  if (FAILED(result)) {
+    fprintf(stderr, "Error writing command\n");
+  }
+  RegCloseKey(key);
+
+}
+
+extern "C" void Discord_Register(const char *applicationId, const char *command) {
+
+  wchar_t appId[32]{};
+  MultiByteToWideChar(CP_UTF8, 0, applicationId, -1, appId, 32);
+
+  wchar_t openCommand[1024]{};
+  const wchar_t *wcommand = nullptr;
+  if (command && command[0]) {
+    const auto commandBufferLen = sizeof(openCommand) / sizeof(*openCommand);
+    MultiByteToWideChar(CP_UTF8, 0, command, -1, openCommand, commandBufferLen);
+    wcommand = openCommand;
+  }
+
+  Discord_RegisterW(appId, wcommand);
+
+}

3rdparty/discord-rpc/discord_rpc.cpp

@@ -0,0 +1,510 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <atomic>
+#include <chrono>
+#include <mutex>
+#include <condition_variable>
+#include <thread>
+
+#include "discord_rpc.h"
+#include "discord_backoff.h"
+#include "discord_register.h"
+#include "discord_msg_queue.h"
+#include "discord_rpc_connection.h"
+#include "discord_serialization.h"
+
+using namespace discord_rpc;
+
+static void Discord_UpdateConnection();
+
+namespace {
+
+constexpr size_t MaxMessageSize{ 16 * 1024 };
+constexpr size_t MessageQueueSize{ 8 };
+constexpr size_t JoinQueueSize{ 8 };
+
+struct QueuedMessage {
+  size_t length;
+  char buffer[MaxMessageSize];
+
+  void Copy(const QueuedMessage &other) {
+    length = other.length;
+    if (length) {
+      memcpy(buffer, other.buffer, length);
+    }
+  }
+};
+
+struct User {
+  // snowflake (64bit int), turned into a ascii decimal string, at most 20 chars +1 null
+  // terminator = 21
+  char userId[32];
+  // 32 unicode glyphs is max name size => 4 bytes per glyph in the worst case, +1 for null
+  // terminator = 129
+  char username[344];
+  // 4 decimal digits + 1 null terminator = 5
+  char discriminator[8];
+  // optional 'a_' + md5 hex digest (32 bytes) + null terminator = 35
+  char avatar[128];
+  // Rounded way up because I'm paranoid about games breaking from future changes in these sizes
+};
+
+static RpcConnection *Connection{ nullptr };
+static DiscordEventHandlers QueuedHandlers{};
+static DiscordEventHandlers Handlers{};
+static std::atomic_bool WasJustConnected{ false };
+static std::atomic_bool WasJustDisconnected{ false };
+static std::atomic_bool GotErrorMessage{ false };
+static std::atomic_bool WasJoinGame{ false };
+static std::atomic_bool WasSpectateGame{ false };
+static std::atomic_bool UpdatePresence{ false };
+static char JoinGameSecret[256];
+static char SpectateGameSecret[256];
+static int LastErrorCode{ 0 };
+static char LastErrorMessage[256];
+static int LastDisconnectErrorCode{ 0 };
+static char LastDisconnectErrorMessage[256];
+static std::mutex PresenceMutex;
+static std::mutex HandlerMutex;
+static QueuedMessage QueuedPresence{};
+static MsgQueue<QueuedMessage, MessageQueueSize> SendQueue;
+static MsgQueue<User, JoinQueueSize> JoinAskQueue;
+static User connectedUser;
+
+// We want to auto connect, and retry on failure, but not as fast as possible. This does expoential backoff from 0.5 seconds to 1 minute
+static Backoff ReconnectTimeMs(500, 60 * 1000);
+static auto NextConnect = std::chrono::system_clock::now();
+static int Pid{ 0 };
+static int Nonce{ 1 };
+
+class IoThreadHolder {
+ private:
+  std::atomic_bool keepRunning{ true };
+  std::mutex waitForIOMutex;
+  std::condition_variable waitForIOActivity;
+  std::thread ioThread;
+
+ public:
+  void Start() {
+    keepRunning.store(true);
+    ioThread = std::thread([&]() {
+        const std::chrono::duration<int64_t, std::milli> maxWait { 500LL };
+        Discord_UpdateConnection();
+        while (keepRunning.load()) {
+          std::unique_lock<std::mutex> lock(waitForIOMutex);
+          waitForIOActivity.wait_for(lock, maxWait);
+          Discord_UpdateConnection();
+        }
+      });
+  }
+
+  void Notify() { waitForIOActivity.notify_all(); }
+
+  void Stop() {
+    keepRunning.exchange(false);
+    Notify();
+    if (ioThread.joinable()) {
+      ioThread.join();
+    }
+  }
+
+  ~IoThreadHolder() { Stop(); }
+};
+
+static IoThreadHolder *IoThread{ nullptr };
+
+static void UpdateReconnectTime() {
+
+  NextConnect = std::chrono::system_clock::now() + std::chrono::duration<int64_t, std::milli> { ReconnectTimeMs.nextDelay() };
+
+}
+
+static void SignalIOActivity() {
+
+  if (IoThread != nullptr) {
+    IoThread->Notify();
+  }
+
+}
+
+static bool RegisterForEvent(const char *evtName) {
+
+  auto qmessage = SendQueue.GetNextAddMessage();
+  if (qmessage) {
+    qmessage->length = JsonWriteSubscribeCommand(qmessage->buffer, sizeof(qmessage->buffer), Nonce++, evtName);
+    SendQueue.CommitAdd();
+    SignalIOActivity();
+    return true;
+  }
+
+  return false;
+
+}
+
+static bool DeregisterForEvent(const char *evtName) {
+
+  auto qmessage = SendQueue.GetNextAddMessage();
+  if (qmessage) {
+    qmessage->length = JsonWriteUnsubscribeCommand(qmessage->buffer, sizeof(qmessage->buffer), Nonce++, evtName);
+    SendQueue.CommitAdd();
+    SignalIOActivity();
+    return true;
+  }
+
+  return false;
+
+}
+
+} // namespace
+
+static void Discord_UpdateConnection() {
+
+  if (!Connection) {
+    return;
+  }
+
+  if (!Connection->IsOpen()) {
+    if (std::chrono::system_clock::now() >= NextConnect) {
+      UpdateReconnectTime();
+      Connection->Open();
+    }
+  }
+  else {
+    // reads
+
+    for (;;) {
+      JsonDocument message;
+
+      if (!Connection->Read(message)) {
+        break;
+      }
+
+      const char *evtName = GetStrMember(&message, "evt");
+      const char *nonce = GetStrMember(&message, "nonce");
+
+      if (nonce) {
+        // in responses only -- should use to match up response when needed.
+
+        if (evtName && strcmp(evtName, "ERROR") == 0) {
+          auto data = GetObjMember(&message, "data");
+          LastErrorCode = GetIntMember(data, "code");
+          StringCopy(LastErrorMessage, GetStrMember(data, "message", ""));
+          GotErrorMessage.store(true);
+        }
+      }
+      else {
+        // should have evt == name of event, optional data
+        if (evtName == nullptr) {
+          continue;
+        }
+
+        auto data = GetObjMember(&message, "data");
+
+        if (strcmp(evtName, "ACTIVITY_JOIN") == 0) {
+          auto secret = GetStrMember(data, "secret");
+          if (secret) {
+            StringCopy(JoinGameSecret, secret);
+            WasJoinGame.store(true);
+          }
+        }
+        else if (strcmp(evtName, "ACTIVITY_SPECTATE") == 0) {
+          auto secret = GetStrMember(data, "secret");
+          if (secret) {
+            StringCopy(SpectateGameSecret, secret);
+            WasSpectateGame.store(true);
+          }
+        }
+        else if (strcmp(evtName, "ACTIVITY_JOIN_REQUEST") == 0) {
+          auto user = GetObjMember(data, "user");
+          auto userId = GetStrMember(user, "id");
+          auto username = GetStrMember(user, "username");
+          auto avatar = GetStrMember(user, "avatar");
+          auto joinReq = JoinAskQueue.GetNextAddMessage();
+          if (userId && username && joinReq) {
+            StringCopy(joinReq->userId, userId);
+            StringCopy(joinReq->username, username);
+            auto discriminator = GetStrMember(user, "discriminator");
+            if (discriminator) {
+              StringCopy(joinReq->discriminator, discriminator);
+            }
+            if (avatar) {
+              StringCopy(joinReq->avatar, avatar);
+            }
+            else {
+              joinReq->avatar[0] = 0;
+            }
+            JoinAskQueue.CommitAdd();
+          }
+        }
+      }
+    }
+
+    // writes
+    if (UpdatePresence.exchange(false) && QueuedPresence.length) {
+      QueuedMessage local;
+      {
+        std::lock_guard<std::mutex> guard(PresenceMutex);
+        local.Copy(QueuedPresence);
+      }
+      if (!Connection->Write(local.buffer, local.length)) {
+        // if we fail to send, requeue
+        std::lock_guard<std::mutex> guard(PresenceMutex);
+        QueuedPresence.Copy(local);
+        UpdatePresence.exchange(true);
+      }
+    }
+
+    while (SendQueue.HavePendingSends()) {
+      auto qmessage = SendQueue.GetNextSendMessage();
+      Connection->Write(qmessage->buffer, qmessage->length);
+      SendQueue.CommitSend();
+    }
+  }
+
+}
+
+extern "C" void Discord_Initialize(const char *applicationId, DiscordEventHandlers *handlers, const int autoRegister) {
+
+  IoThread = new (std::nothrow) IoThreadHolder();
+  if (IoThread == nullptr) {
+    return;
+  }
+
+  if (autoRegister) {
+    Discord_Register(applicationId, nullptr);
+  }
+
+  Pid = GetProcessId();
+
+  {
+    std::lock_guard<std::mutex> guard(HandlerMutex);
+
+    if (handlers) {
+      QueuedHandlers = *handlers;
+    }
+    else {
+      QueuedHandlers = {};
+    }
+
+    Handlers = {};
+  }
+
+  if (Connection) {
+    return;
+  }
+
+  Connection = RpcConnection::Create(applicationId);
+  Connection->onConnect = [](JsonDocument &readyMessage) {
+    Discord_UpdateHandlers(&QueuedHandlers);
+    if (QueuedPresence.length > 0) {
+      UpdatePresence.exchange(true);
+      SignalIOActivity();
+    }
+    auto data = GetObjMember(&readyMessage, "data");
+    auto user = GetObjMember(data, "user");
+    auto userId = GetStrMember(user, "id");
+    auto username = GetStrMember(user, "username");
+    auto avatar = GetStrMember(user, "avatar");
+    if (userId && username) {
+      StringCopy(connectedUser.userId, userId);
+      StringCopy(connectedUser.username, username);
+      auto discriminator = GetStrMember(user, "discriminator");
+      if (discriminator) {
+        StringCopy(connectedUser.discriminator, discriminator);
+      }
+      if (avatar) {
+        StringCopy(connectedUser.avatar, avatar);
+      }
+      else {
+        connectedUser.avatar[0] = 0;
+      }
+    }
+    WasJustConnected.exchange(true);
+    ReconnectTimeMs.reset();
+  };
+  Connection->onDisconnect = [](int err, const char *message) {
+    LastDisconnectErrorCode = err;
+    StringCopy(LastDisconnectErrorMessage, message);
+    WasJustDisconnected.exchange(true);
+    UpdateReconnectTime();
+  };
+
+  IoThread->Start();
+
+}
+
+extern "C" void Discord_Shutdown() {
+
+  if (!Connection) {
+    return;
+  }
+  Connection->onConnect = nullptr;
+  Connection->onDisconnect = nullptr;
+  Handlers = {};
+  QueuedPresence.length = 0;
+  UpdatePresence.exchange(false);
+  if (IoThread != nullptr) {
+    IoThread->Stop();
+    delete IoThread;
+    IoThread = nullptr;
+  }
+
+  RpcConnection::Destroy(Connection);
+
+}
+
+extern "C" void Discord_UpdatePresence(const DiscordRichPresence *presence) {
+
+  {
+    std::lock_guard<std::mutex> guard(PresenceMutex);
+    QueuedPresence.length = JsonWriteRichPresenceObj(QueuedPresence.buffer, sizeof(QueuedPresence.buffer), Nonce++, Pid, presence);
+    UpdatePresence.exchange(true);
+  }
+
+  SignalIOActivity();
+
+}
+
+extern "C" void Discord_ClearPresence(void) {
+  Discord_UpdatePresence(nullptr);
+}
+
+extern "C" void Discord_Respond(const char *userId, /* DISCORD_REPLY_ */ int reply) {
+
+  // if we are not connected, let's not batch up stale messages for later
+  if (!Connection || !Connection->IsOpen()) {
+    return;
+  }
+  auto qmessage = SendQueue.GetNextAddMessage();
+  if (qmessage) {
+    qmessage->length = JsonWriteJoinReply(qmessage->buffer, sizeof(qmessage->buffer), userId, reply, Nonce++);
+    SendQueue.CommitAdd();
+    SignalIOActivity();
+  }
+
+}
+
+extern "C" void Discord_RunCallbacks() {
+
+  // Note on some weirdness: internally we might connect, get other signals, disconnect any number
+  // of times inbetween calls here. Externally, we want the sequence to seem sane, so any other
+  // signals are book-ended by calls to ready and disconnect.
+
+  if (!Connection) {
+    return;
+  }
+
+  const bool wasDisconnected = WasJustDisconnected.exchange(false);
+  const bool isConnected = Connection->IsOpen();
+
+  if (isConnected) {
+    // if we are connected, disconnect cb first
+    std::lock_guard<std::mutex> guard(HandlerMutex);
+    if (wasDisconnected && Handlers.disconnected) {
+      Handlers.disconnected(LastDisconnectErrorCode, LastDisconnectErrorMessage);
+    }
+  }
+
+  if (WasJustConnected.exchange(false)) {
+    std::lock_guard<std::mutex> guard(HandlerMutex);
+    if (Handlers.ready) {
+      DiscordUser du{ connectedUser.userId, connectedUser.username, connectedUser.discriminator, connectedUser.avatar };
+      Handlers.ready(&du);
+    }
+  }
+
+  if (GotErrorMessage.exchange(false)) {
+    std::lock_guard<std::mutex> guard(HandlerMutex);
+    if (Handlers.errored) {
+      Handlers.errored(LastErrorCode, LastErrorMessage);
+    }
+  }
+
+  if (WasJoinGame.exchange(false)) {
+    std::lock_guard<std::mutex> guard(HandlerMutex);
+    if (Handlers.joinGame) {
+      Handlers.joinGame(JoinGameSecret);
+    }
+  }
+
+  if (WasSpectateGame.exchange(false)) {
+    std::lock_guard<std::mutex> guard(HandlerMutex);
+    if (Handlers.spectateGame) {
+      Handlers.spectateGame(SpectateGameSecret);
+    }
+  }
+
+  // Right now this batches up any requests and sends them all in a burst; I could imagine a world
+  // where the implementer would rather sequentially accept/reject each one before the next invite
+  // is sent. I left it this way because I could also imagine wanting to process these all and
+  // maybe show them in one common dialog and/or start fetching the avatars in parallel, and if
+  // not it should be trivial for the implementer to make a queue themselves.
+  while (JoinAskQueue.HavePendingSends()) {
+    const auto req = JoinAskQueue.GetNextSendMessage();
+    {
+      std::lock_guard<std::mutex> guard(HandlerMutex);
+      if (Handlers.joinRequest) {
+        DiscordUser du{ req->userId, req->username, req->discriminator, req->avatar };
+        Handlers.joinRequest(&du);
+      }
+    }
+    JoinAskQueue.CommitSend();
+  }
+
+  if (!isConnected) {
+    // if we are not connected, disconnect message last
+    std::lock_guard<std::mutex> guard(HandlerMutex);
+    if (wasDisconnected && Handlers.disconnected) {
+      Handlers.disconnected(LastDisconnectErrorCode, LastDisconnectErrorMessage);
+    }
+  }
+
+}
+
+extern "C" void Discord_UpdateHandlers(DiscordEventHandlers *newHandlers) {
+
+  if (newHandlers) {
+#define HANDLE_EVENT_REGISTRATION(handler_name, event)            \
+        if (!Handlers.handler_name && newHandlers->handler_name) {      \
+          RegisterForEvent(event);                                      \
+        }                                                               \
+        else if (Handlers.handler_name && !newHandlers->handler_name) { \
+          DeregisterForEvent(event);                                    \
+        }
+
+    std::lock_guard<std::mutex> guard(HandlerMutex);
+    HANDLE_EVENT_REGISTRATION(joinGame, "ACTIVITY_JOIN")
+    HANDLE_EVENT_REGISTRATION(spectateGame, "ACTIVITY_SPECTATE")
+    HANDLE_EVENT_REGISTRATION(joinRequest, "ACTIVITY_JOIN_REQUEST")
+
+#undef HANDLE_EVENT_REGISTRATION
+
+    Handlers = *newHandlers;
+  }
+  else {
+    std::lock_guard<std::mutex> guard(HandlerMutex);
+    Handlers = {};
+  }
+
+}

3rdparty/discord-rpc/discord_rpc.h

@@ -0,0 +1,94 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef DISCORD_RPC_H
+#define DISCORD_RPC_H
+
+#include <cstdint>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct DiscordRichPresence {
+  int type;
+  int status_display_type;
+  const char *name;    /* max 128 bytes */
+  const char *state;   /* max 128 bytes */
+  const char *details; /* max 128 bytes */
+  int64_t startTimestamp;
+  int64_t endTimestamp;
+  const char *largeImageKey;  /* max 32 bytes */
+  const char *largeImageText; /* max 128 bytes */
+  const char *smallImageKey;  /* max 32 bytes */
+  const char *smallImageText; /* max 128 bytes */
+  const char *partyId;        /* max 128 bytes */
+  int partySize;
+  int partyMax;
+  int partyPrivacy;
+  const char *matchSecret;    /* max 128 bytes */
+  const char *joinSecret;     /* max 128 bytes */
+  const char *spectateSecret; /* max 128 bytes */
+  int8_t instance;
+} DiscordRichPresence;
+
+typedef struct DiscordUser {
+  const char *userId;
+  const char *username;
+  const char *discriminator;
+  const char *avatar;
+} DiscordUser;
+
+typedef struct DiscordEventHandlers {
+  void (*ready)(const DiscordUser *request);
+  void (*disconnected)(int errorCode, const char *message);
+  void (*errored)(int errorCode, const char *message);
+  void (*joinGame)(const char *joinSecret);
+  void (*spectateGame)(const char *spectateSecret);
+  void (*joinRequest)(const DiscordUser *request);
+} DiscordEventHandlers;
+
+#define DISCORD_REPLY_NO      0
+#define DISCORD_REPLY_YES     1
+#define DISCORD_REPLY_IGNORE  2
+#define DISCORD_PARTY_PRIVATE 0
+#define DISCORD_PARTY_PUBLIC  1
+
+void Discord_Initialize(const char *applicationId, DiscordEventHandlers *handlers, const int autoRegister);
+void Discord_Shutdown(void);
+
+// checks for incoming messages, dispatches callbacks
+void Discord_RunCallbacks(void);
+
+void Discord_UpdatePresence(const DiscordRichPresence *presence);
+void Discord_ClearPresence(void);
+
+void Discord_Respond(const char *userid, /* DISCORD_REPLY_ */ int reply);
+
+void Discord_UpdateHandlers(DiscordEventHandlers *handlers);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif  // DISCORD_RPC_H

3rdparty/discord-rpc/discord_rpc_connection.cpp

@@ -0,0 +1,168 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include "discord_rpc_connection.h"
+#include "discord_serialization.h"
+
+namespace discord_rpc {
+
+static const int RpcVersion = 1;
+static RpcConnection Instance;
+
+RpcConnection *RpcConnection::Create(const char *applicationId) {
+
+  Instance.connection = BaseConnection::Create();
+  StringCopy(Instance.appId, applicationId);
+  return &Instance;
+
+}
+
+void RpcConnection::Destroy(RpcConnection *&c) {
+
+  c->Close();
+  BaseConnection::Destroy(c->connection);
+  c = nullptr;
+
+}
+
+void RpcConnection::Open() {
+
+  if (state == State::Connected) {
+    return;
+  }
+
+  if (state == State::Disconnected && !connection->Open()) {
+    return;
+  }
+
+  if (state == State::SentHandshake) {
+    JsonDocument message;
+    if (Read(message)) {
+      auto cmd = GetStrMember(&message, "cmd");
+      auto evt = GetStrMember(&message, "evt");
+      if (cmd && evt && !strcmp(cmd, "DISPATCH") && !strcmp(evt, "READY")) {
+        state = State::Connected;
+        if (onConnect) {
+          onConnect(message);
+        }
+      }
+    }
+  }
+  else {
+    sendFrame.opcode = Opcode::Handshake;
+    sendFrame.length = static_cast<uint32_t>(JsonWriteHandshakeObj(sendFrame.message, sizeof(sendFrame.message), RpcVersion, appId));
+
+    if (connection->Write(&sendFrame, sizeof(MessageFrameHeader) + sendFrame.length)) {
+      state = State::SentHandshake;
+    }
+    else {
+      Close();
+    }
+  }
+
+}
+
+void RpcConnection::Close() {
+
+  if (onDisconnect && (state == State::Connected || state == State::SentHandshake)) {
+    onDisconnect(lastErrorCode, lastErrorMessage);
+  }
+  connection->Close();
+  state = State::Disconnected;
+
+}
+
+bool RpcConnection::Write(const void *data, size_t length) {
+
+  sendFrame.opcode = Opcode::Frame;
+  memcpy(sendFrame.message, data, length);
+  sendFrame.length = static_cast<uint32_t>(length);
+  if (!connection->Write(&sendFrame, sizeof(MessageFrameHeader) + length)) {
+    Close();
+    return false;
+  }
+
+  return true;
+
+}
+
+bool RpcConnection::Read(JsonDocument &message) {
+
+  if (state != State::Connected && state != State::SentHandshake) {
+    return false;
+  }
+  MessageFrame readFrame{};
+  for (;;) {
+    bool didRead = connection->Read(&readFrame, sizeof(MessageFrameHeader));
+    if (!didRead) {
+      if (!connection->isOpen) {
+        lastErrorCode = static_cast<int>(ErrorCode::PipeClosed);
+        StringCopy(lastErrorMessage, "Pipe closed");
+        Close();
+      }
+      return false;
+    }
+
+    if (readFrame.length > 0) {
+      didRead = connection->Read(readFrame.message, readFrame.length);
+      if (!didRead) {
+        lastErrorCode = static_cast<int>(ErrorCode::ReadCorrupt);
+        StringCopy(lastErrorMessage, "Partial data in frame");
+        Close();
+        return false;
+      }
+      readFrame.message[readFrame.length] = 0;
+    }
+
+    switch (readFrame.opcode) {
+      case Opcode::Close: {
+        message.ParseInsitu(readFrame.message);
+        lastErrorCode = GetIntMember(&message, "code");
+        StringCopy(lastErrorMessage, GetStrMember(&message, "message", ""));
+        Close();
+        return false;
+      }
+      case Opcode::Frame:
+        message.ParseInsitu(readFrame.message);
+        return true;
+      case Opcode::Ping:
+        readFrame.opcode = Opcode::Pong;
+        if (!connection->Write(&readFrame, sizeof(MessageFrameHeader) + readFrame.length)) {
+          Close();
+        }
+        break;
+      case Opcode::Pong:
+        break;
+      case Opcode::Handshake:
+      default:
+        // something bad happened
+        lastErrorCode = static_cast<int>(ErrorCode::ReadCorrupt);
+        StringCopy(lastErrorMessage, "Bad ipc frame");
+        Close();
+        return false;
+    }
+  }
+
+}
+
+}  // namespace discord_rpc

3rdparty/discord-rpc/discord_rpc_connection.h

@@ -0,0 +1,88 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef DISCORD_RPC_CONNECTION_H
+#define DISCORD_RPC_CONNECTION_H
+
+#include "discord_connection.h"
+#include "discord_serialization.h"
+
+namespace discord_rpc {
+
+// I took this from the buffer size libuv uses for named pipes; I suspect ours would usually be much smaller.
+constexpr size_t MaxRpcFrameSize = 64 * 1024;
+
+struct RpcConnection {
+  enum class ErrorCode : int {
+    Success = 0,
+    PipeClosed = 1,
+    ReadCorrupt = 2,
+  };
+
+  enum class Opcode : uint32_t {
+    Handshake = 0,
+    Frame = 1,
+    Close = 2,
+    Ping = 3,
+    Pong = 4,
+  };
+
+  struct MessageFrameHeader {
+    Opcode opcode;
+    uint32_t length;
+  };
+
+  struct MessageFrame : public MessageFrameHeader {
+    char message[MaxRpcFrameSize - sizeof(MessageFrameHeader)];
+  };
+
+  enum class State : uint32_t {
+    Disconnected,
+    SentHandshake,
+    AwaitingResponse,
+    Connected,
+  };
+
+  BaseConnection *connection{ nullptr };
+  State state{ State::Disconnected };
+  void (*onConnect)(JsonDocument &message) { nullptr };
+  void (*onDisconnect)(int errorCode, const char *message) { nullptr };
+  char appId[64]{};
+  int lastErrorCode{ 0 };
+  char lastErrorMessage[256]{};
+  RpcConnection::MessageFrame sendFrame;
+
+  static RpcConnection *Create(const char *applicationId);
+  static void Destroy(RpcConnection*&);
+
+  inline bool IsOpen() const { return state == State::Connected; }
+
+  void Open();
+  void Close();
+  bool Write(const void *data, size_t length);
+  bool Read(JsonDocument &message);
+};
+
+}  // namespace discord_rpc
+
+#endif  // DISCORD_RPC_CONNECTION_H

3rdparty/discord-rpc/discord_serialization.cpp

@@ -0,0 +1,285 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include "discord_serialization.h"
+#include "discord_connection.h"
+#include "discord_rpc.h"
+
+namespace discord_rpc {
+
+template<typename T>
+void NumberToString(char *dest, T number) {
+
+  if (!number) {
+    *dest++ = '0';
+    *dest++ = 0;
+    return;
+  }
+  if (number < 0) {
+    *dest++ = '-';
+    number = -number;
+  }
+  char temp[32];
+  int place = 0;
+  while (number) {
+    auto digit = number % 10;
+    number = number / 10;
+    temp[place++] = '0' + static_cast<char>(digit);
+  }
+  for (--place; place >= 0; --place) {
+    *dest++ = temp[place];
+  }
+  *dest = 0;
+
+}
+
+// it's ever so slightly faster to not have to strlen the key
+template<typename T>
+void WriteKey(JsonWriter &w, T &k) {
+  w.Key(k, sizeof(T) - 1);
+}
+
+struct WriteObject {
+  JsonWriter &writer;
+  WriteObject(JsonWriter &w)
+      : writer(w) {
+    writer.StartObject();
+  }
+  template<typename T>
+  WriteObject(JsonWriter &w, T &name)
+      : writer(w) {
+    WriteKey(writer, name);
+    writer.StartObject();
+  }
+  ~WriteObject() { writer.EndObject(); }
+};
+
+struct WriteArray {
+  JsonWriter &writer;
+  template<typename T>
+  WriteArray(JsonWriter &w, T &name)
+      : writer(w) {
+    WriteKey(writer, name);
+    writer.StartArray();
+  }
+  ~WriteArray() { writer.EndArray(); }
+};
+
+template<typename T>
+void WriteOptionalString(JsonWriter &w, T &k, const char *value) {
+
+  if (value && value[0]) {
+    w.Key(k, sizeof(T) - 1);
+    w.String(value);
+  }
+
+}
+
+static void JsonWriteNonce(JsonWriter &writer, const int nonce) {
+
+  WriteKey(writer, "nonce");
+  char nonceBuffer[32];
+  NumberToString(nonceBuffer, nonce);
+  writer.String(nonceBuffer);
+
+}
+
+size_t JsonWriteRichPresenceObj(char *dest, const size_t maxLen, const int nonce, const int pid, const DiscordRichPresence *presence) {
+
+  JsonWriter writer(dest, maxLen);
+
+  {
+    WriteObject top(writer);
+
+    JsonWriteNonce(writer, nonce);
+
+    WriteKey(writer, "cmd");
+    writer.String("SET_ACTIVITY");
+
+    {
+      WriteObject args(writer, "args");
+
+      WriteKey(writer, "pid");
+      writer.Int(pid);
+
+      if (presence != nullptr) {
+        WriteObject activity(writer, "activity");
+
+        if (presence->type >= 0 && presence->type <= 5) {
+          WriteKey(writer, "type");
+          writer.Int(presence->type);
+
+          WriteKey(writer, "status_display_type");
+          writer.Int(presence->status_display_type);
+        }
+
+        WriteOptionalString(writer, "name", presence->name);
+        WriteOptionalString(writer, "state", presence->state);
+        WriteOptionalString(writer, "details", presence->details);
+
+        if (presence->startTimestamp || presence->endTimestamp) {
+          WriteObject timestamps(writer, "timestamps");
+
+          if (presence->startTimestamp) {
+            WriteKey(writer, "start");
+            writer.Int64(presence->startTimestamp);
+          }
+
+          if (presence->endTimestamp) {
+            WriteKey(writer, "end");
+            writer.Int64(presence->endTimestamp);
+          }
+        }
+
+        if ((presence->largeImageKey && presence->largeImageKey[0]) ||
+            (presence->largeImageText && presence->largeImageText[0]) ||
+            (presence->smallImageKey && presence->smallImageKey[0]) ||
+            (presence->smallImageText && presence->smallImageText[0])) {
+          WriteObject assets(writer, "assets");
+          WriteOptionalString(writer, "large_image", presence->largeImageKey);
+          WriteOptionalString(writer, "large_text", presence->largeImageText);
+          WriteOptionalString(writer, "small_image", presence->smallImageKey);
+          WriteOptionalString(writer, "small_text", presence->smallImageText);
+        }
+
+        if ((presence->partyId && presence->partyId[0]) || presence->partySize ||
+            presence->partyMax || presence->partyPrivacy) {
+          WriteObject party(writer, "party");
+          WriteOptionalString(writer, "id", presence->partyId);
+          if (presence->partySize && presence->partyMax) {
+            WriteArray size(writer, "size");
+            writer.Int(presence->partySize);
+            writer.Int(presence->partyMax);
+          }
+
+          if (presence->partyPrivacy) {
+            WriteKey(writer, "privacy");
+            writer.Int(presence->partyPrivacy);
+          }
+        }
+
+        if ((presence->matchSecret && presence->matchSecret[0]) ||
+            (presence->joinSecret && presence->joinSecret[0]) ||
+            (presence->spectateSecret && presence->spectateSecret[0])) {
+          WriteObject secrets(writer, "secrets");
+          WriteOptionalString(writer, "match", presence->matchSecret);
+          WriteOptionalString(writer, "join", presence->joinSecret);
+          WriteOptionalString(writer, "spectate", presence->spectateSecret);
+        }
+
+        writer.Key("instance");
+        writer.Bool(presence->instance != 0);
+      }
+    }
+  }
+
+  return writer.Size();
+}
+
+size_t JsonWriteHandshakeObj(char *dest, size_t maxLen, int version, const char *applicationId) {
+
+  JsonWriter writer(dest, maxLen);
+
+  {
+    WriteObject obj(writer);
+    WriteKey(writer, "v");
+    writer.Int(version);
+    WriteKey(writer, "client_id");
+    writer.String(applicationId);
+  }
+
+  return writer.Size();
+
+}
+
+size_t JsonWriteSubscribeCommand(char *dest, size_t maxLen, int nonce, const char *evtName) {
+
+  JsonWriter writer(dest, maxLen);
+
+  {
+    WriteObject obj(writer);
+
+    JsonWriteNonce(writer, nonce);
+
+    WriteKey(writer, "cmd");
+    writer.String("SUBSCRIBE");
+
+    WriteKey(writer, "evt");
+    writer.String(evtName);
+  }
+
+  return writer.Size();
+
+}
+
+size_t JsonWriteUnsubscribeCommand(char *dest, size_t maxLen, int nonce, const char *evtName) {
+
+  JsonWriter writer(dest, maxLen);
+
+  {
+    WriteObject obj(writer);
+
+    JsonWriteNonce(writer, nonce);
+
+    WriteKey(writer, "cmd");
+    writer.String("UNSUBSCRIBE");
+
+    WriteKey(writer, "evt");
+    writer.String(evtName);
+  }
+
+  return writer.Size();
+
+}
+
+size_t JsonWriteJoinReply(char *dest, size_t maxLen, const char *userId, const int reply, const int nonce) {
+
+  JsonWriter writer(dest, maxLen);
+
+  {
+    WriteObject obj(writer);
+
+    WriteKey(writer, "cmd");
+    if (reply == DISCORD_REPLY_YES) {
+      writer.String("SEND_ACTIVITY_JOIN_INVITE");
+    }
+    else {
+      writer.String("CLOSE_ACTIVITY_JOIN_REQUEST");
+    }
+
+    WriteKey(writer, "args");
+    {
+      WriteObject args(writer);
+
+      WriteKey(writer, "user_id");
+      writer.String(userId);
+    }
+
+    JsonWriteNonce(writer, nonce);
+  }
+
+  return writer.Size();
+
+}
+
+}  // namespace discord_rpc

3rdparty/discord-rpc/discord_serialization.h

@@ -0,0 +1,213 @@
+/*
+ * Copyright 2017 Discord, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef DISCORD_SERIALIZATION_H
+#define DISCORD_SERIALIZATION_H
+
+#include <rapidjson/document.h>
+#include <rapidjson/stringbuffer.h>
+#include <rapidjson/writer.h>
+
+struct DiscordRichPresence;
+
+namespace discord_rpc {
+
+// if only there was a standard library function for this
+template<size_t Len>
+inline size_t StringCopy(char (&dest)[Len], const char *src) {
+  if (!src || !Len) {
+    return 0;
+  }
+  size_t copied;
+  char *out = dest;
+  for (copied = 1; *src && copied < Len; ++copied) {
+    *out++ = *src++;
+  }
+  *out = 0;
+  return copied - 1;
+}
+
+size_t JsonWriteHandshakeObj(char *dest, size_t maxLen, int version, const char *applicationId);
+
+// Commands
+size_t JsonWriteRichPresenceObj(char *dest, const size_t maxLen, const int nonce, const int pid, const DiscordRichPresence *presence);
+size_t JsonWriteSubscribeCommand(char *dest, size_t maxLen, int nonce, const char *evtName);
+
+size_t JsonWriteUnsubscribeCommand(char *dest, size_t maxLen, int nonce, const char *evtName);
+
+size_t JsonWriteJoinReply(char *dest, size_t maxLen, const char *userId, int reply, int nonce);
+
+// I want to use as few allocations as I can get away with, and to do that with RapidJson, you need
+// to supply some of your own allocators for stuff rather than use the defaults
+
+class LinearAllocator {
+ public:
+  char *buffer_;
+  char *end_;
+  LinearAllocator() {
+    assert(0);  // needed for some default case in rapidjson, should not use
+  }
+  LinearAllocator(char *buffer, size_t size)
+      : buffer_(buffer), end_(buffer + size) {
+  }
+  static const bool kNeedFree = false;
+  void *Malloc(size_t size) {
+    char *res = buffer_;
+    buffer_ += size;
+    if (buffer_ > end_) {
+      buffer_ = res;
+      return nullptr;
+    }
+    return res;
+  }
+  void *Realloc(void *originalPtr, size_t originalSize, size_t newSize) {
+    if (newSize == 0) {
+      return nullptr;
+    }
+    // allocate how much you need in the first place
+    assert(!originalPtr && !originalSize);
+    // unused parameter warning
+    (void)(originalPtr);
+    (void)(originalSize);
+    return Malloc(newSize);
+  }
+  static void Free(void *ptr) {
+    /* shrug */
+    (void)ptr;
+  }
+};
+
+template<size_t Size>
+class FixedLinearAllocator : public LinearAllocator {
+ public:
+  char fixedBuffer_[Size];
+  FixedLinearAllocator()
+      : LinearAllocator(fixedBuffer_, Size) {
+  }
+  static const bool kNeedFree = false;
+};
+
+// wonder why this isn't a thing already, maybe I missed it
+class DirectStringBuffer {
+ public:
+  using Ch = char;
+  char *buffer_;
+  char *end_;
+  char *current_;
+
+  DirectStringBuffer(char *buffer, size_t maxLen)
+      : buffer_(buffer), end_(buffer + maxLen), current_(buffer) {
+  }
+
+  void Put(char c) {
+    if (current_ < end_) {
+      *current_++ = c;
+    }
+  }
+  void Flush() {}
+  size_t GetSize() const { return static_cast<size_t>(current_ - buffer_); }
+};
+
+using MallocAllocator = rapidjson::CrtAllocator;
+using PoolAllocator = rapidjson::MemoryPoolAllocator<MallocAllocator>;
+using UTF8 = rapidjson::UTF8<char>;
+// Writer appears to need about 16 bytes per nested object level (with 64bit size_t)
+using StackAllocator = FixedLinearAllocator<2048>;
+constexpr size_t WriterNestingLevels = 2048 / (2 * sizeof(size_t));
+using JsonWriterBase =
+  rapidjson::Writer<DirectStringBuffer, UTF8, UTF8, StackAllocator, rapidjson::kWriteNoFlags>;
+class JsonWriter : public JsonWriterBase {
+ public:
+  DirectStringBuffer stringBuffer_;
+  StackAllocator stackAlloc_;
+
+  JsonWriter(char *dest, size_t maxLen)
+      : JsonWriterBase(stringBuffer_, &stackAlloc_, WriterNestingLevels), stringBuffer_(dest, maxLen), stackAlloc_() {
+  }
+
+  size_t Size() const { return stringBuffer_.GetSize(); }
+};
+
+using JsonDocumentBase = rapidjson::GenericDocument<UTF8, PoolAllocator, StackAllocator>;
+class JsonDocument : public JsonDocumentBase {
+ public:
+  static const int kDefaultChunkCapacity = 32 * 1024;
+  // json parser will use this buffer first, then allocate more if needed; I seriously doubt we
+  // send any messages that would use all of this, though.
+  char parseBuffer_[32 * 1024];
+  MallocAllocator mallocAllocator_;
+  PoolAllocator poolAllocator_;
+  StackAllocator stackAllocator_;
+  JsonDocument()
+      : JsonDocumentBase(rapidjson::kObjectType,
+                         &poolAllocator_,
+                         sizeof(stackAllocator_.fixedBuffer_),
+                         &stackAllocator_),
+        poolAllocator_(parseBuffer_, sizeof(parseBuffer_), kDefaultChunkCapacity, &mallocAllocator_), stackAllocator_() {
+  }
+};
+
+using JsonValue = rapidjson::GenericValue<UTF8, PoolAllocator>;
+
+inline JsonValue *GetObjMember(JsonValue *obj, const char *name) {
+
+  if (obj) {
+    auto member = obj->FindMember(name);
+    if (member != obj->MemberEnd() && member->value.IsObject()) {
+      return &member->value;
+    }
+  }
+
+  return nullptr;
+
+}
+
+inline int GetIntMember(JsonValue *obj, const char *name, int notFoundDefault = 0) {
+
+  if (obj) {
+    auto member = obj->FindMember(name);
+    if (member != obj->MemberEnd() && member->value.IsInt()) {
+      return member->value.GetInt();
+    }
+  }
+
+  return notFoundDefault;
+
+}
+
+inline const char *GetStrMember(JsonValue *obj, const char *name, const char *notFoundDefault = nullptr) {
+
+  if (obj) {
+    auto member = obj->FindMember(name);
+    if (member != obj->MemberEnd() && member->value.IsString()) {
+      return member->value.GetString();
+    }
+  }
+
+  return notFoundDefault;
+
+}
+
+}  // namespace discord_rpc
+
+#endif  // DISCORD_SERIALIZATION_H

CMakeLists.txt

@@ -208,28 +208,26 @@ else()
   pkg_check_modules(TAGLIB REQUIRED IMPORTED_TARGET taglib>=1.12)
 endif()
 
+find_package(projectM4 COMPONENTS Playlist)
+if(projectM4_FOUND)
+  set(LIBPROJECTM_FOUND ON)
+  set(HAVE_PROJECTM4 ON)
+  set(LIBPROJECTM_LIBRARIES libprojectM::projectM libprojectM::playlist)
+else()
+  pkg_check_modules(LIBPROJECTM libprojectM)
+endif()
+
 find_package(GTest)
 
 pkg_check_modules(LIBSPARSEHASH IMPORTED_TARGET libsparsehash)
 
-find_package(discord-rpc)
+find_package(RapidJSON)
-if(TARGET discord-rpc::discord-rpc)
-  set(DISCORD_RPC_FOUND ON)
-  set(DISCORD_RPC_LIBRARIES "discord-rpc::discord-rpc")
-else()
-  find_library(DISCORD_RPC_LIBRARY discord-rpc)
-  find_path(DISCORD_RPC_INCLUDE_DIRS NAMES discord-rpc.h)
-  if(DISCORD_RPC_LIBRARY)
-    set(DISCORD_RPC_FOUND ON)
-    set(DISCORD_RPC_LIBRARIES ${DISCORD_RPC_LIBRARY})
-  endif()
-endif()
 
 set(QT_VERSION_MAJOR 6)
 set(QT_MIN_VERSION 6.4.0)
 set(QT_DEFAULT_MAJOR_VERSION ${QT_VERSION_MAJOR})
 set(QT_COMPONENTS Core Concurrent Gui Widgets Network Sql)
-set(QT_OPTIONAL_COMPONENTS GuiPrivate LinguistTools Test)
+set(QT_OPTIONAL_COMPONENTS GuiPrivate OpenGLWidgets LinguistTools Test)
 if(UNIX AND NOT APPLE)
   list(APPEND QT_OPTIONAL_COMPONENTS DBus)
 endif()
@@ -389,7 +387,7 @@ optional_component(STREAMTAGREADER ON "Stream tagreader"
 )
 
 optional_component(DISCORD_RPC ON "Discord Rich Presence"
-  DEPENDS "discord-rpc" DISCORD_RPC_FOUND
+  DEPENDS "RapidJSON" RapidJSON_FOUND
 )
 
 if(HAVE_SONGFINGERPRINTING OR HAVE_MUSICBRAINZ)
@@ -400,6 +398,11 @@ if(HAVE_X11_GLOBALSHORTCUTS OR HAVE_KGLOBALACCEL_GLOBALSHORTCUTS OR APPLE OR WIN
   set(HAVE_GLOBALSHORTCUTS ON)
 endif()
 
+optional_component(VISUALIZATIONS ON "Visualizations"
+  DEPENDS "libprojectm" LIBPROJECTM_FOUND
+  DEPENDS "QtOpenGLWidgets" Qt${QT_VERSION_MAJOR}OpenGLWidgets_FOUND
+)
+
 if(NOT CMAKE_CROSSCOMPILING)
   # Check that we have Qt with sqlite driver
   set(CMAKE_REQUIRED_FLAGS "-std=c++17")
@@ -1491,6 +1494,26 @@ optional_source(HAVE_QOBUZ
     src/settings/qobuzsettingspage.ui
 )
 
+optional_source(HAVE_VISUALIZATIONS
+  SOURCES
+    src/visualizations/projectmpresetmodel.cpp
+    src/visualizations/projectmvisualization.cpp
+    src/visualizations/visualizationcontainer.cpp
+    src/visualizations/visualizationoverlay.cpp
+    src/visualizations/visualizationselector.cpp
+    src/visualizations/visualizationopenglwidget.cpp
+  HEADERS
+    src/visualizations/projectmpresetmodel.h
+    src/visualizations/projectmvisualization.h
+    src/visualizations/visualizationcontainer.h
+    src/visualizations/visualizationoverlay.h
+    src/visualizations/visualizationselector.h
+    src/visualizations/visualizationopenglwidget.h
+  UI
+    src/visualizations/visualizationoverlay.ui
+    src/visualizations/visualizationselector.ui
+)
+
 qt_wrap_cpp(SOURCES ${HEADERS})
 qt_wrap_ui(SOURCES ${UI})
 qt_add_resources(SOURCES data/data.qrc data/icons.qrc)
@@ -1514,6 +1537,11 @@ if(LINUX AND LSB_RELEASE_EXEC AND DPKG_BUILDPACKAGE)
   add_subdirectory(debian)
 endif()
 
+if(HAVE_DISCORD_RPC)
+  add_subdirectory(3rdparty/discord-rpc)
+  target_include_directories(strawberry_lib PUBLIC 3rdparty/discord-rpc)
+endif()
+
 if(HAVE_TRANSLATIONS)
   qt_add_lupdate(strawberry_lib TS_FILES "${CMAKE_SOURCE_DIR}/src/translations/strawberry_en_US.ts" OPTIONS -locations none -no-ui-lines -no-obsolete)
   file(GLOB_RECURSE ts_files ${CMAKE_SOURCE_DIR}/src/translations/*.ts)
@@ -1535,10 +1563,6 @@ if(SINGLEAPPLICATION_INCLUDE_DIRS)
   target_include_directories(strawberry_lib SYSTEM PUBLIC ${SINGLEAPPLICATION_INCLUDE_DIRS})
 endif()
 
-if(DISCORD_RPC_INCLUDE_DIRS)
-  target_include_directories(strawberry_lib SYSTEM PUBLIC ${DISCORD_RPC_INCLUDE_DIRS})
-endif()
-
 target_link_libraries(strawberry_lib PUBLIC
   ${CMAKE_THREAD_LIBS_INIT}
   $<$<BOOL:${HAVE_BACKTRACE}>:${Backtrace_LIBRARIES}>
@@ -1560,6 +1584,7 @@ target_link_libraries(strawberry_lib PUBLIC
   Qt${QT_VERSION_MAJOR}::Sql
   $<$<BOOL:${HAVE_DBUS}>:Qt${QT_VERSION_MAJOR}::DBus>
   $<$<BOOL:${HAVE_QPA_QPLATFORMNATIVEINTERFACE}>:Qt${QT_VERSION_MAJOR}::GuiPrivate>
+  $<$<BOOL:${HAVE_VISUALIZATIONS}>:Qt${QT_VERSION_MAJOR}::OpenGLWidgets>
   ICU::uc
   ICU::i18n
   $<$<BOOL:${HAVE_STREAMTAGREADER}>:PkgConfig::LIBSPARSEHASH>
@@ -1575,10 +1600,11 @@ target_link_libraries(strawberry_lib PUBLIC
   $<$<BOOL:${HAVE_MTP}>:PkgConfig::LIBMTP>
   $<$<BOOL:${HAVE_GPOD}>:PkgConfig::LIBGPOD PkgConfig::GDK_PIXBUF>
   $<$<BOOL:${HAVE_QTSPARKLE}>:qtsparkle-qt${QT_VERSION_MAJOR}::qtsparkle>
+  $<$<BOOL:${HAVE_VISUALIZATIONS}>:${LIBPROJECTM_LIBRARIES}>
   $<$<BOOL:${WIN32}>:dsound dwmapi ${GETOPT_LIBRARIES}>
   $<$<BOOL:${MSVC}>:WindowsApp>
   KDAB::kdsingleapplication
-  $<$<BOOL:${HAVE_DISCORD_RPC}>:${DISCORD_RPC_LIBRARIES}>
+  $<$<BOOL:${HAVE_DISCORD_RPC}>:discord-rpc>
 )
 
 if(APPLE)

debian/control

@@ -32,7 +32,8 @@ Build-Depends: debhelper-compat (= 12),
                libfftw3-dev,
                libebur128-dev,
                libsparsehash-dev,
-               rapidjson-dev
+               rapidjson-dev,
+               libprojectm-dev
 Standards-Version: 4.7.0
 
 Package: strawberry

dist/unix/strawberry.spec.in

@@ -43,6 +43,7 @@ BuildRequires:  pkgconfig(taglib)
 BuildRequires:  pkgconfig(fftw3)
 BuildRequires:  pkgconfig(icu-uc)
 BuildRequires:  pkgconfig(icu-i18n)
+BuildRequires:  pkgconfig(libprojectM)
 BuildRequires:  cmake(Qt@QT_VERSION_MAJOR@Core)
 BuildRequires:  cmake(Qt@QT_VERSION_MAJOR@Concurrent)
 BuildRequires:  cmake(Qt@QT_VERSION_MAJOR@Network)

src/analyzer/analyzercontainer.cpp

@@ -73,7 +73,8 @@ AnalyzerContainer::AnalyzerContainer(QWidget *parent)
       double_click_timer_(new QTimer(this)),
       ignore_next_click_(false),
       current_analyzer_(nullptr),
-      engine_(nullptr) {
+      engine_(nullptr),
+      action_visualization_(nullptr) {
 
   QHBoxLayout *layout = new QHBoxLayout(this);
   setLayout(layout);
@@ -118,6 +119,17 @@ void AnalyzerContainer::mouseReleaseEvent(QMouseEvent *e) {
 
 }
 
+void AnalyzerContainer::mouseDoubleClickEvent(QMouseEvent *e) {
+
+  Q_UNUSED(e);
+
+  double_click_timer_->stop();
+  ignore_next_click_ = true;
+
+  if (action_visualization_) action_visualization_->trigger();
+
+}
+
 void AnalyzerContainer::ShowPopupMenu() {
   context_menu_->popup(last_click_pos_);
 }
@@ -249,3 +261,10 @@ void AnalyzerContainer::AddFramerate(const QString &name, const int framerate) {
   QObject::connect(action, &QAction::triggered, this, [this, framerate]() { ChangeFramerate(framerate); } );
 
 }
+
+void AnalyzerContainer::SetVisualizationsAction(QAction *visualization) {
+
+  action_visualization_ = visualization;
+  context_menu_->addAction(action_visualization_);
+
+}

src/analyzer/analyzercontainer.h

@@ -46,6 +46,7 @@ class AnalyzerContainer : public QWidget {
   explicit AnalyzerContainer(QWidget *parent);
 
   void SetEngine(SharedPtr<EngineBase> engine);
+  void SetVisualizationsAction(QAction *visualization);
 
   static const char *kSettingsGroup;
   static const char *kSettingsFramerate;
@@ -55,6 +56,7 @@ class AnalyzerContainer : public QWidget {
 
  protected:
   void mouseReleaseEvent(QMouseEvent *e) override;
+  void mouseDoubleClickEvent(QMouseEvent *e) override;
   void wheelEvent(QWheelEvent *e) override;
 
  private Q_SLOTS:
@@ -89,6 +91,8 @@ class AnalyzerContainer : public QWidget {
 
   AnalyzerBase *current_analyzer_;
   SharedPtr<EngineBase> engine_;
+
+  QAction *action_visualization_;
 };
 
 template<typename T>

src/config.h.in

@@ -48,4 +48,7 @@
 
 #cmakedefine ENABLE_WIN32_CONSOLE
 
+#cmakedefine HAVE_VISUALIZATIONS
+#cmakedefine HAVE_PROJECTM4
+
 #endif // CONFIG_H_IN

src/core/mainwindow.cpp

@@ -206,6 +206,11 @@
 
 #include "organize/organizeerrordialog.h"
 
+#ifdef HAVE_VISUALIZATIONS
+#  include "visualizations/visualizationcontainer.h"
+#  include "engine/gstengine.h"
+#endif
+
 #ifdef Q_OS_WIN32
 #  include "core/windows7thumbbar.h"
 #endif
@@ -623,6 +628,12 @@ MainWindow::MainWindow(Application *app,
   stop_menu->addAction(ui_->action_stop_after_this_track);
   ui_->stop_button->setMenu(stop_menu);
 
+#ifdef HAVE_VISUALIZATIONS
+  QObject::connect(ui_->action_visualizations, &QAction::triggered, this, &MainWindow::ShowVisualizations);
+#else
+  ui_->action_visualizations->setEnabled(false);
+#endif
+
   // Player connections
   QObject::connect(ui_->volume, &VolumeSlider::valueChanged, &*app_->player(), &Player::SetVolumeFromSlider);
 
@@ -907,6 +918,7 @@ MainWindow::MainWindow(Application *app,
 
   // Analyzer
   QObject::connect(ui_->analyzer, &AnalyzerContainer::WheelEvent, this, &MainWindow::VolumeWheelEvent);
+  ui_->analyzer->SetVisualizationsAction(ui_->action_visualizations);
 
   // Statusbar widgets
   ui_->playlist_summary->setMinimumWidth(QFontMetrics(font()).horizontalAdvance(u"WW selected of WW tracks - [ WW:WW ]"_s));
@@ -3404,3 +3416,24 @@ void MainWindow::FocusSearchField() {
   }
 
 }
+
+void MainWindow::ShowVisualizations() {
+
+#ifdef HAVE_VISUALIZATIONS
+
+  if (!visualization_) {
+    visualization_.reset(new VisualizationContainer);
+
+    visualization_->SetActions(ui_->action_previous_track, ui_->action_play_pause, ui_->action_stop, ui_->action_next_track);
+    connect(&*app_->player(), &Player::Stopped, &*visualization_, &VisualizationContainer::Stopped);
+    connect(&*app_->player(), &Player::ForceShowOSD, &*visualization_, &VisualizationContainer::SongMetadataChanged);
+    connect(&*app_->playlist_manager(), &PlaylistManager::CurrentSongChanged, &*visualization_, &VisualizationContainer::SongMetadataChanged);
+
+    visualization_->SetEngine(qobject_cast<GstEngine*>(&*app_->player()->engine()));
+  }
+
+  visualization_->show();
+
+#endif  // HAVE_VISUALIZATIONS
+
+}

src/core/mainwindow.h

@@ -97,6 +97,7 @@ class Windows7ThumbBar;
 class AddStreamDialog;
 class LastFMImportDialog;
 class RadioViewContainer;
+class VisualizationContainer;
 
 #ifdef HAVE_DISCORD_RPC
 namespace discord {
@@ -281,6 +282,7 @@ class MainWindow : public QMainWindow, public PlatformInterface {
  public Q_SLOTS:
   void CommandlineOptionsReceived(const QByteArray &string_options);
   void Raise();
+  void ShowVisualizations();
 
  private:
   void SaveSettings();
@@ -360,6 +362,10 @@ class MainWindow : public QMainWindow, public PlatformInterface {
 
   LastFMImportDialog *lastfm_import_dialog_;
 
+#ifdef HAVE_VISUALIZATIONS
+  ScopedPtr<VisualizationContainer> visualization_;
+#endif
+
   QAction *collection_show_all_;
   QAction *collection_show_duplicates_;
   QAction *collection_show_untagged_;

src/core/mainwindow.ui

@@ -517,6 +517,7 @@
     <addaction name="action_cover_manager"/>
     <addaction name="action_equalizer"/>
     <addaction name="action_transcoder"/>
+    <addaction name="action_visualizations"/>
     <addaction name="separator"/>
     <addaction name="action_update_collection"/>
     <addaction name="action_full_collection_scan"/>
@@ -863,6 +864,11 @@
     <string>Import data from last.fm...</string>
    </property>
   </action>
+  <action name="action_visualizations">
+    <property name="text">
+      <string>Visualizations</string>
+    </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <customwidgets>

src/discord/richpresence.cpp

@@ -75,7 +75,7 @@ void RichPresence::ReloadSettings() {
   s.endGroup();
 
   if (enabled && !initialized_) {
-    Discord_Initialize(kDiscordApplicationId, nullptr, 0, nullptr);
+    Discord_Initialize(kDiscordApplicationId, nullptr, 0);
     initialized_ = true;
   }
   else if (!enabled && initialized_) {
@@ -124,6 +124,7 @@ void RichPresence::SendPresenceUpdate() {
   // Listening to
   presence_data.type = 2;
   presence_data.status_display_type = status_display_type_;
+
   presence_data.largeImageKey = kStrawberryIconResourceName;
   presence_data.smallImageKey = kStrawberryIconResourceName;
   presence_data.smallImageText = kStrawberryIconDescription;

src/engine/gstbufferconsumer.h

@@ -36,7 +36,7 @@ class GstBufferConsumer {
 
   // This is called in some unspecified GStreamer thread.
   // Ownership of the buffer is transferred to the BufferConsumer, and it should gst_buffer_unref it.
-  virtual void ConsumeBuffer(GstBuffer *buffer, const int pipeline_id, const QString &format) = 0;
+  virtual void ConsumeBuffer(GstBuffer *buffer, const int pipeline_id, const QString &format, const int channels) = 0;
 
  private:
   Q_DISABLE_COPY(GstBufferConsumer)

src/engine/gstengine.cpp

@@ -543,7 +543,9 @@ void GstEngine::ReloadSettings() {
 
 }
 
-void GstEngine::ConsumeBuffer(GstBuffer *buffer, const int pipeline_id, const QString &format) {
+void GstEngine::ConsumeBuffer(GstBuffer *buffer, const int pipeline_id, const QString &format, const int channels) {
+
+  Q_UNUSED(channels);
 
   // Schedule this to run in the GUI thread.  The buffer gets added to the queue and unreffed by UpdateScope.
   if (!QMetaObject::invokeMethod(this, "AddBufferToScope", Q_ARG(GstBuffer*, buffer), Q_ARG(int, pipeline_id), Q_ARG(QString, format))) {

src/engine/gstengine.h

@@ -84,7 +84,7 @@ class GstEngine : public EngineBase, public GstBufferConsumer {
   bool ALSADeviceSupport(const QString &output) const override;
   bool ExclusiveModeSupport(const QString &output) const override;
 
-  void ConsumeBuffer(GstBuffer *buffer, const int pipeline_id, const QString &format) override;
+  void ConsumeBuffer(GstBuffer *buffer, const int pipeline_id, const QString &format, const int channels) override;
 
  public Q_SLOTS:
   void ReloadSettings() override;

src/engine/gstenginepipeline.cpp

@@ -1385,7 +1385,7 @@ GstPadProbeReturn GstEnginePipeline::BufferProbeCallback(GstPad *pad, GstPadProb
 
   for (GstBufferConsumer *consumer : std::as_const(consumers)) {
     gst_buffer_ref(buf);
-    consumer->ConsumeBuffer(buf, instance->id(), format);
+    consumer->ConsumeBuffer(buf, instance->id(), format, channels);
   }
 
   if (buf16) {

src/visualizations/projectmpresetmodel.cpp

@@ -0,0 +1,159 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <QAbstractItemModel>
+#include <QString>
+#include <QStringList>
+#include <QFileInfo>
+#include <QDir>
+#include <QDirIterator>
+
+#include "core/logging.h"
+
+#include "projectmpresetmodel.h"
+#include "projectmvisualization.h"
+
+ProjectMPresetModel::ProjectMPresetModel(ProjectMVisualization *projectm_visualization, QObject *parent)
+    : QAbstractItemModel(parent),
+      projectm_visualization_(projectm_visualization) {
+
+  // Find presets
+  if (QFileInfo::exists(projectm_visualization_->preset_path())) {
+    QDirIterator it(projectm_visualization_->preset_path(), QStringList() << QStringLiteral("*.milk") << QStringLiteral("*.prjm"), QDir::Files | QDir::NoDotAndDotDot | QDir::Readable, QDirIterator::Subdirectories);
+    QStringList files;
+    while (it.hasNext()) {
+      it.next();
+      files << it.filePath();
+    }
+    std::stable_sort(files.begin(), files.end());
+    for (const QString &filepath : std::as_const(files)) {
+      const QFileInfo fileinfo(filepath);
+      all_presets_ << Preset(fileinfo.filePath(), fileinfo.fileName(), false);
+    }
+  }
+  else {
+    qLog(Error) << "ProjectM preset path" << projectm_visualization_->preset_path() << "does not exist";
+  }
+
+}
+
+int ProjectMPresetModel::rowCount(const QModelIndex &idx) const {
+
+  Q_UNUSED(idx);
+
+  if (!projectm_visualization_) return 0;
+
+  return static_cast<int>(all_presets_.count());
+
+}
+
+int ProjectMPresetModel::columnCount(const QModelIndex &idx) const {
+  Q_UNUSED(idx);
+  return 1;
+}
+
+QModelIndex ProjectMPresetModel::index(const int row, const int column, const QModelIndex &idx) const {
+  Q_UNUSED(idx);
+  return createIndex(row, column);
+}
+
+QModelIndex ProjectMPresetModel::parent(const QModelIndex &child) const {
+  Q_UNUSED(child);
+  return QModelIndex();
+}
+
+QVariant ProjectMPresetModel::data(const QModelIndex &index, const int role) const {
+
+  switch (role) {
+    case Qt::DisplayRole:
+      return all_presets_[index.row()].name_;
+    case Qt::CheckStateRole:{
+      bool selected = all_presets_[index.row()].selected_;
+      return selected ? Qt::Checked : Qt::Unchecked;
+    }
+    case Role::Role_Path:
+      return all_presets_[index.row()].path_;
+    default:
+      return QVariant();
+  }
+
+}
+
+Qt::ItemFlags ProjectMPresetModel::flags(const QModelIndex &idx) const {
+
+  if (!idx.isValid()) return QAbstractItemModel::flags(idx);
+  return Qt::ItemIsSelectable | Qt::ItemIsEditable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled;
+
+}
+
+bool ProjectMPresetModel::setData(const QModelIndex &idx, const QVariant &value, int role) {
+
+  if (role == Qt::CheckStateRole) {
+    all_presets_[idx.row()].selected_ = value.toBool();
+    projectm_visualization_->SetSelected(QStringList() << all_presets_[idx.row()].path_, value.toBool());
+    return true;
+  }
+
+  return false;
+
+}
+
+void ProjectMPresetModel::SetImmediatePreset(const QModelIndex &idx) {
+  projectm_visualization_->SetImmediatePreset(all_presets_[idx.row()].path_);
+}
+
+void ProjectMPresetModel::SelectAll() {
+
+  QStringList paths;
+  paths.reserve(all_presets_.count());
+  for (int i = 0; i < all_presets_.count(); ++i) {
+    paths << all_presets_[i].path_;
+    all_presets_[i].selected_ = true;
+  }
+  projectm_visualization_->SetSelected(paths, true);
+
+  Q_EMIT dataChanged(index(0, 0), index(rowCount() - 1, 0));
+
+}
+
+void ProjectMPresetModel::SelectNone() {
+
+  projectm_visualization_->ClearSelected();
+  for (int i = 0; i < all_presets_.count(); ++i) {
+    all_presets_[i].selected_ = false;
+  }
+
+  Q_EMIT dataChanged(index(0, 0), index(rowCount() - 1, 0));
+
+}
+
+void ProjectMPresetModel::MarkSelected(const QString &path, const bool selected) {
+
+  for (int i = 0; i < all_presets_.count(); ++i) {
+    if (path == all_presets_[i].path_) {
+      all_presets_[i].selected_ = selected;
+      return;
+    }
+  }
+
+}

src/visualizations/projectmpresetmodel.h

@@ -0,0 +1,77 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef PROJECTMPRESETMODEL_H
+#define PROJECTMPRESETMODEL_H
+
+#include "config.h"
+
+#include <QList>
+#include <QString>
+#include <QAbstractItemModel>
+
+class ProjectMVisualization;
+
+class ProjectMPresetModel : public QAbstractItemModel {
+  Q_OBJECT
+
+  friend class ProjectMVisualization;
+
+ public:
+  explicit ProjectMPresetModel(ProjectMVisualization *projectm_visualization, QObject *parent = nullptr);
+
+  enum Role {
+    Role_Path = Qt::UserRole,
+  };
+
+  void MarkSelected(const QString &path, bool selected);
+
+  // QAbstractItemModel
+  QModelIndex index(const int row, const int column, const QModelIndex &parent = QModelIndex()) const override;
+  QModelIndex parent(const QModelIndex &child) const override;
+  int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+  int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+  QVariant data(const QModelIndex &index, const int role = Qt::DisplayRole) const override;
+  Qt::ItemFlags flags(const QModelIndex &index) const override;
+  bool setData(const QModelIndex &index, const QVariant &value, const int role = Qt::EditRole) override;
+
+ public Q_SLOTS:
+  void SetImmediatePreset(const QModelIndex &index);
+  void SelectAll();
+  void SelectNone();
+
+ private:
+  struct Preset {
+    explicit Preset(const QString &path, const QString &name, const bool selected)
+        : path_(path),
+          name_(name),
+          selected_(selected) {}
+
+    QString path_;
+    QString name_;
+    bool selected_;
+  };
+
+  ProjectMVisualization *projectm_visualization_;
+  QList<Preset> all_presets_;
+};
+
+#endif  // PROJECTMPRESETMODEL_H

src/visualizations/projectmvisualization.cpp

@@ -0,0 +1,469 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <string>
+#include <memory>
+
+#ifdef HAVE_PROJECTM4
+#  include <projectM-4/types.h>
+#  include <projectM-4/core.h>
+#  include <projectM-4/parameters.h>
+#  include <projectM-4/memory.h>
+#  include <projectM-4/audio.h>
+#  include <projectM-4/render_opengl.h>
+#  include <projectM-4/playlist_types.h>
+#  include <projectM-4/playlist_core.h>
+#  include <projectM-4/playlist_memory.h>
+#  include <projectM-4/playlist_items.h>
+#  include <projectM-4/playlist_playback.h>
+#else
+#  include <libprojectM/projectM.hpp>
+#endif  // HAVE_PROJECTM4
+
+#include <QCoreApplication>
+#include <QGraphicsScene>
+#include <QString>
+#include <QStringList>
+#include <QDir>
+#include <QFileInfo>
+#include <QScopeGuard>
+#include <QPainter>
+#include <QRandomGenerator>
+#include <QMessageBox>
+#include <QTimerEvent>
+
+#include "core/logging.h"
+#include "core/settings.h"
+#include "projectmvisualization.h"
+#include "projectmpresetmodel.h"
+#include "visualizationcontainer.h"
+
+ProjectMVisualization::ProjectMVisualization(VisualizationContainer *container)
+    : QGraphicsScene(container),
+      container_(container),
+      preset_model_(nullptr),
+#ifdef HAVE_PROJECTM4
+      projectm_instance_(nullptr),
+      projectm_playlist_instance_(nullptr),
+#endif
+      mode_(Mode::Random),
+      duration_(15),
+      texture_size_(512) {
+
+  QObject::connect(this, &QGraphicsScene::sceneRectChanged, this, &ProjectMVisualization::SceneRectChanged);
+
+#ifndef HAVE_PROJECTM4
+  for (int i = 0; i < TOTAL_RATING_TYPES; ++i) {
+    default_rating_list_.push_back(3);
+  }
+#endif  // HAVE_PROJECTM4
+
+}
+
+ProjectMVisualization::~ProjectMVisualization() {
+
+#ifdef HAVE_PROJECTM4
+  if (projectm_playlist_instance_) {
+    projectm_playlist_destroy(projectm_playlist_instance_);
+  }
+  if (projectm_instance_) {
+    projectm_destroy(projectm_instance_);
+  }
+#endif  // HAVE_PROJECTM4
+
+}
+
+void ProjectMVisualization::Init() {
+
+#ifdef HAVE_PROJECTM4
+  if (projectm_instance_) {
+    return;
+  }
+#else
+  if (projectm_) {
+    return;
+  }
+#endif  // HAVE_PROJECTM4
+
+  // Find the projectM presets
+
+  QStringList data_paths = QStringList() << QStringLiteral("/usr/share")
+                                         << QStringLiteral("/usr/local/share")
+                                         << QLatin1String(CMAKE_INSTALL_PREFIX) + QLatin1String("/share");
+
+  const QStringList xdg_data_dirs = QString::fromUtf8(qgetenv("XDG_DATA_DIRS")).split(QLatin1Char(':'));
+  for (const QString &xdg_data_dir : xdg_data_dirs) {
+    if (!data_paths.contains(xdg_data_dir)) {
+      data_paths.append(xdg_data_dir);
+    }
+  }
+
+#if defined(Q_OS_WIN32)
+  data_paths.prepend(QCoreApplication::applicationDirPath());
+#endif
+
+  const QStringList projectm_paths = QStringList() << QStringLiteral("projectM/presets")
+                                                   << QStringLiteral("projectm-presets");
+
+  QStringList preset_paths;
+  for (const QString &data_path : std::as_const(data_paths)) {
+    for (const QString &projectm_path : projectm_paths) {
+      const QString path = data_path + QLatin1Char('/') + projectm_path;
+      if (!QFileInfo::exists(path) || QDir(path).entryList(QDir::Dirs | QDir::Files | QDir::NoDotAndDotDot).isEmpty()) {
+        preset_paths << path;
+        continue;
+      }
+      preset_path_ = path;
+      break;
+    }
+  }
+
+  // Create projectM settings
+#ifdef HAVE_PROJECTM4
+  Q_ASSERT(projectm_instance_ == nullptr);
+  Q_ASSERT(projectm_playlist_instance_ == nullptr);
+  projectm_instance_ = projectm_create();
+  projectm_set_preset_duration(projectm_instance_, duration_);
+  projectm_set_mesh_size(projectm_instance_, 32, 24);
+  projectm_set_fps(projectm_instance_, 35);
+  projectm_set_window_size(projectm_instance_, 512, 512);
+  projectm_playlist_instance_ = projectm_playlist_create(projectm_instance_);
+#else
+  projectM::Settings s;
+  s.presetURL = preset_path_.toStdString();
+  s.meshX = 32;
+  s.meshY = 24;
+  s.textureSize = texture_size_;
+  s.fps = 35;
+  s.windowWidth = 512;
+  s.windowHeight = 512;
+  s.smoothPresetDuration = 5;
+  s.presetDuration = duration_;
+  s.shuffleEnabled = true;
+  s.softCutRatingsEnabled = false;
+  s.easterEgg = 0;
+  projectm_ = std::make_unique<projectM>(s);
+#endif  // HAVE_PROJECTM4
+
+  Q_ASSERT(preset_model_ == nullptr);
+  preset_model_ = new ProjectMPresetModel(this, this);
+
+  Load();
+
+  // Start at a random preset.
+#ifdef HAVE_PROJECTM4
+  const uint count = projectm_playlist_size(projectm_playlist_instance_);
+  if (count > 0) {
+    const uint position = QRandomGenerator::global()->bounded(count);
+    projectm_playlist_set_position(projectm_playlist_instance_, position, true);
+  }
+#else
+  const uint count = projectm_->getPlaylistSize();
+  if (count > 0) {
+    const uint selection = QRandomGenerator::global()->bounded(count);
+    projectm_->selectPreset(selection, true);
+  }
+#endif  // HAVE_PROJECTM4
+
+  if (preset_path_.isEmpty()) {
+    qWarning("ProjectM presets could not be found, search path was:\n  %s", preset_paths.join(QLatin1String("\n  ")).toLocal8Bit().constData());
+    QMessageBox::warning(nullptr, tr("Missing projectM presets"), tr("Strawberry could not load any projectM visualizations.  Check that you have installed Strawberry properly."));
+  }
+
+  Resize(sceneRect().width(), sceneRect().height(), container_->devicePixelRatio());
+
+}
+
+void ProjectMVisualization::drawBackground(QPainter *p, const QRectF &rect) {
+
+  Q_UNUSED(rect);
+
+  p->beginNativePainting();
+
+#ifdef HAVE_PROJECTM4
+  projectm_opengl_render_frame(projectm_instance_);
+#else
+  projectm_->renderFrame();
+#endif
+
+  p->endNativePainting();
+
+}
+
+void ProjectMVisualization::SceneRectChanged(const QRectF &rect) {
+
+  Resize(rect.width(), rect.height(), container_->devicePixelRatio());
+
+}
+
+void ProjectMVisualization::Resize(const qreal width, const qreal height, const qreal pixel_ratio) {
+
+#ifdef HAVE_PROJECTM4
+  if (projectm_instance_) {
+    projectm_set_window_size(projectm_instance_, static_cast<size_t>(width * pixel_ratio), static_cast<size_t>(height * pixel_ratio));
+  }
+#else
+  if (projectm_) {
+    projectm_->projectM_resetGL(static_cast<int>(width * pixel_ratio), static_cast<int>(height * pixel_ratio));
+  }
+#endif  // HAVE_PROJECTM4
+
+}
+
+void ProjectMVisualization::SetTextureSize(const int size) {
+
+  texture_size_ = size;
+
+#ifndef HAVE_PROJECTM4
+  if (projectm_) {
+    projectm_->changeTextureSize(texture_size_);
+  }
+#endif  // HAVE_PROJECTM4
+
+}
+
+void ProjectMVisualization::SetDuration(const int seconds) {
+
+  duration_ = seconds;
+
+#ifdef HAVE_PROJECTM4
+  if (projectm_instance_) {
+    projectm_set_preset_duration(projectm_instance_, duration_);
+  }
+#else
+  if (projectm_) {
+    projectm_->changePresetDuration(duration_);
+  }
+#endif  // HAVE_PROJECTM4
+
+  Save();
+
+}
+
+void ProjectMVisualization::ConsumeBuffer(GstBuffer *buffer, const int pipeline_id, const QString &format, const int channels) {
+
+  Q_UNUSED(pipeline_id);
+  Q_UNUSED(format);
+
+  GstMapInfo map;
+  gst_buffer_map(buffer, &map, GST_MAP_READ);
+
+#ifdef HAVE_PROJECTM4
+  if (projectm_instance_) {
+    const unsigned int samples_per_channel = (map.size / sizeof(int16_t)) / channels;
+    const int16_t *data = reinterpret_cast<int16_t*>(map.data);
+    projectm_pcm_add_int16(projectm_instance_, data, samples_per_channel, static_cast<projectm_channels>(channels));
+  }
+#else
+  if (projectm_) {
+    const int16_t samples_per_channel = static_cast<int16_t>((map.size / sizeof(int16_t)) / channels);
+    const int16_t *data = reinterpret_cast<int16_t*>(map.data);
+    projectm_->pcm()->addPCM16Data(data, samples_per_channel);
+  }
+#endif  // HAVE_PROJECTM4
+
+  gst_buffer_unmap(buffer, &map);
+  gst_buffer_unref(buffer);
+
+}
+
+void ProjectMVisualization::SetSelected(const QStringList &paths, const bool selected) {
+
+  for (const QString &path : paths) {
+    const int index = IndexOfPreset(path);
+    if (selected && index == -1) {
+#ifdef HAVE_PROJECTM4
+      projectm_playlist_add_preset(projectm_playlist_instance_, path.toUtf8().constData(), true);
+#else
+      projectm_->addPresetURL(path.toStdString(), std::string(), default_rating_list_);
+#endif
+    }
+    else if (!selected && index != -1) {
+#ifdef HAVE_PROJECTM4
+      projectm_playlist_remove_preset(projectm_playlist_instance_, index);
+#else
+      projectm_->removePreset(index);
+#endif
+    }
+  }
+
+  Save();
+
+}
+
+void ProjectMVisualization::ClearSelected() {
+
+#ifdef HAVE_PROJECTM4
+  projectm_playlist_clear(projectm_playlist_instance_);
+#else
+  projectm_->clearPlaylist();
+#endif
+
+  Save();
+
+}
+
+int ProjectMVisualization::IndexOfPreset(const QString &preset_path) const {
+
+#ifdef HAVE_PROJECTM4
+  const uint count = projectm_playlist_size(projectm_playlist_instance_);
+  for (uint i = 0; i < count; ++i) {
+    char *projectm_preset_path = projectm_playlist_item(projectm_playlist_instance_, i);
+    if (projectm_preset_path) {
+      const QScopeGuard projectm_preset_path_deleter = qScopeGuard([projectm_preset_path](){ projectm_playlist_free_string(projectm_preset_path); });
+      if (QLatin1String(projectm_preset_path) == preset_path) {
+        return static_cast<int>(i);
+      }
+    }
+  }
+#else
+  const uint count = projectm_->getPlaylistSize();
+  for (uint i = 0; i < count; ++i) {
+    if (QString::fromStdString(projectm_->getPresetURL(i)) == preset_path) return static_cast<int>(i);
+  }
+#endif  // HAVE_PROJECTM4
+
+  return -1;
+
+}
+
+void ProjectMVisualization::Load() {
+
+  Settings s;
+  s.beginGroup(QLatin1String(VisualizationContainer::kSettingsGroup));
+  mode_ = Mode(s.value("mode", 0).toInt());
+  duration_ = s.value("duration", duration_).toInt();
+  s.endGroup();
+
+#ifdef HAVE_PROJECTM4
+  projectm_set_preset_duration(projectm_instance_, duration_);
+  projectm_playlist_clear(projectm_playlist_instance_);
+#else
+  projectm_->changePresetDuration(duration_);
+  projectm_->clearPlaylist();
+#endif  // HAVE_PROJECTM4
+
+  switch (mode_) {
+    case Mode::Random:{
+      for (int i = 0; i < preset_model_->all_presets_.count(); ++i) {
+#ifdef HAVE_PROJECTM4
+        projectm_playlist_add_preset(projectm_playlist_instance_, preset_model_->all_presets_[i].path_.toUtf8().constData(), false);
+#else
+        projectm_->addPresetURL(preset_model_->all_presets_[i].path_.toStdString(), std::string(), default_rating_list_);
+#endif
+        preset_model_->all_presets_[i].selected_ = true;
+      }
+      break;
+    }
+    case Mode::FromList:{
+      s.beginGroup(QLatin1String(VisualizationContainer::kSettingsGroup));
+      const QStringList paths = s.value("preset_paths").toStringList();
+      s.endGroup();
+      for (const QString &path : paths) {
+#ifdef HAVE_PROJECTM4
+        projectm_playlist_add_preset(projectm_playlist_instance_, path.toUtf8().constData(), true);
+#else
+        projectm_->addPresetURL(path.toStdString(), std::string(), default_rating_list_);
+#endif
+        preset_model_->MarkSelected(path, true);
+      }
+    }
+  }
+
+}
+
+void ProjectMVisualization::Save() {
+
+  QStringList paths;
+
+  for (const ProjectMPresetModel::Preset &preset : std::as_const(preset_model_->all_presets_)) {
+    if (preset.selected_) paths << preset.path_;
+  }
+
+  Settings s;
+  s.beginGroup(VisualizationContainer::kSettingsGroup);
+  s.setValue("preset_paths", paths);
+  s.setValue("mode", static_cast<int>(mode_));
+  s.setValue("duration", duration_);
+  s.endGroup();
+
+}
+
+void ProjectMVisualization::SetMode(const Mode mode) {
+
+  mode_ = mode;
+  Save();
+
+}
+
+QString ProjectMVisualization::preset_path() const {
+
+#ifdef HAVE_PROJECTM4
+  return preset_path_;
+#else
+  if (projectm_) {
+    return QString::fromStdString(projectm_->settings().presetURL);
+  }
+  return QString();
+#endif  // HAVE_PROJECTM4
+
+}
+
+void ProjectMVisualization::SetImmediatePreset(const int index) {
+
+#ifdef HAVE_PROJECTM4
+  if (projectm_playlist_instance_) {
+    projectm_playlist_set_position(projectm_playlist_instance_, index, true);
+  }
+#else
+  if (projectm_) {
+    projectm_->selectPreset(index, true);
+  }
+#endif  // HAVE_PROJECTM4
+
+}
+
+void ProjectMVisualization::SetImmediatePreset(const QString &path) {
+
+  const int index = IndexOfPreset(path);
+  if (index != -1) {
+    SetImmediatePreset(index);
+  }
+
+}
+
+void ProjectMVisualization::Lock(const bool lock) {
+
+#ifdef HAVE_PROJECTM4
+  if (projectm_instance_) {
+    projectm_set_preset_locked(projectm_instance_, lock);
+  }
+#else
+  if (projectm_) {
+    projectm_->setPresetLock(lock);
+  }
+#endif  // HAVE_PROJECTM4
+
+  if (!lock) Load();
+
+}

src/visualizations/projectmvisualization.h

@@ -0,0 +1,114 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef PROJECTMVISUALIZATION_H
+#define PROJECTMVISUALIZATION_H
+
+#include "config.h"
+
+#include <memory>
+#include <vector>
+
+#ifdef HAVE_PROJECTM4
+#  include <projectM-4/types.h>
+#  include <projectM-4/playlist_types.h>
+#else
+#  include <libprojectM/projectM.hpp>
+#endif
+
+#include <QString>
+#include <QStringList>
+#include <QGraphicsScene>
+
+#include "engine/gstbufferconsumer.h"
+
+class projectM;
+class QPainter;
+class ProjectMPresetModel;
+class VisualizationContainer;
+
+class ProjectMVisualization : public QGraphicsScene, public GstBufferConsumer {
+  Q_OBJECT
+
+ public:
+  explicit ProjectMVisualization(VisualizationContainer *container);
+  ~ProjectMVisualization();
+
+  enum class Mode {
+    Random = 0,
+    FromList = 1,
+  };
+
+  QString preset_path() const;
+  ProjectMPresetModel *preset_model() const { return preset_model_; }
+
+  Mode mode() const { return mode_; }
+  int duration() const { return duration_; }
+
+  void Init();
+
+  // BufferConsumer
+  void ConsumeBuffer(GstBuffer *buffer, const int pipeline_id, const QString &format, const int channels) override;
+
+ public Q_SLOTS:
+  void SetTextureSize(const int size);
+  void SetDuration(const int seconds);
+
+  void SetSelected(const QStringList &paths, const bool selected);
+  void ClearSelected();
+  void SetImmediatePreset(const int index);
+  void SetImmediatePreset(const QString &path);
+  void SetMode(const Mode mode);
+
+  void Lock(const bool lock);
+
+ protected:
+  // QGraphicsScene
+  void drawBackground(QPainter *painter, const QRectF &rect) override;
+
+ private Q_SLOTS:
+  void SceneRectChanged(const QRectF &rect);
+
+ private:
+  void Load();
+  void Save();
+
+  int IndexOfPreset(const QString &preset_path) const;
+
+  void Resize(const qreal width, const qreal height, const qreal pixel_ratio);
+
+ private:
+  VisualizationContainer *container_;
+  ProjectMPresetModel *preset_model_;
+#ifdef HAVE_PROJECTM4
+  projectm_handle projectm_instance_;
+  projectm_playlist_handle projectm_playlist_instance_;
+#else
+  std::unique_ptr<projectM> projectm_;
+#endif
+  Mode mode_;
+  int duration_;
+  std::vector<int> default_rating_list_;
+  int texture_size_;
+  QString preset_path_;
+};
+
+#endif  // PROJECTMVISUALIZATION_H

src/visualizations/visualizationcontainer.cpp

@@ -0,0 +1,328 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <QtGlobal>
+
+#include <QOpenGLWidget>
+
+#include <QGraphicsProxyWidget>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QMenu>
+#include <QMessageBox>
+#include <QShortcut>
+#include <QActionGroup>
+
+#include "core/logging.h"
+#include "core/iconloader.h"
+#include "core/settings.h"
+#include "engine/gstengine.h"
+#include "visualizationcontainer.h"
+#include "visualizationopenglwidget.h"
+#include "visualizationoverlay.h"
+#include "visualizationselector.h"
+#include "projectmvisualization.h"
+
+const char *VisualizationContainer::kSettingsGroup = "Visualizations";
+
+namespace {
+constexpr int kLowFramerate = 15;
+constexpr int kMediumFramerate = 25;
+constexpr int kHighFramerate = 35;
+constexpr int kSuperHighFramerate = 60;
+
+constexpr int kDefaultWidth = 828;
+constexpr int kDefaultHeight = 512;
+constexpr int kDefaultFps = kHighFramerate;
+constexpr int kDefaultTextureSize = 512;
+}  // namespace
+
+VisualizationContainer::VisualizationContainer(QWidget *parent)
+    : QGraphicsView(parent),
+      projectm_visualization_(new ProjectMVisualization(this)),
+      overlay_(new VisualizationOverlay),
+      selector_(new VisualizationSelector(this)),
+      overlay_proxy_(nullptr),
+      engine_(nullptr),
+      menu_(new QMenu(this)),
+      fps_(kDefaultFps),
+      size_(kDefaultTextureSize) {
+
+  setWindowTitle(tr("Visualizations"));
+  setWindowIcon(IconLoader::Load(QStringLiteral("strawberry")));
+  setMinimumSize(64, 64);
+
+  {
+    Settings s;
+    s.beginGroup(QLatin1String(kSettingsGroup));
+    if (!restoreGeometry(s.value("geometry").toByteArray())) {
+      resize(kDefaultWidth, kDefaultHeight);
+    }
+    fps_ = s.value("fps", kDefaultFps).toInt();
+    size_ = s.value("size", kDefaultTextureSize).toInt();
+    s.endGroup();
+  }
+
+  QShortcut *close = new QShortcut(QKeySequence::Close, this);
+  QObject::connect(close, &QShortcut::activated, this, &VisualizationContainer::close);
+
+  // Set up the graphics view
+  setScene(projectm_visualization_);
+  setViewport(new VisualizationOpenGLWidget(projectm_visualization_));
+  setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
+  setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+  setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+  setFrameStyle(QFrame::NoFrame);
+
+  // Add the overlay
+  overlay_proxy_ = scene()->addWidget(overlay_);
+  QObject::connect(overlay_, &VisualizationOverlay::OpacityChanged, this, &VisualizationContainer::ChangeOverlayOpacity);
+  QObject::connect(overlay_, &VisualizationOverlay::ShowPopupMenu, this, &VisualizationContainer::ShowPopupMenu);
+  ChangeOverlayOpacity(0.0);
+
+  projectm_visualization_->SetTextureSize(size_);
+  SizeChanged();
+
+  // Selector
+  selector_->SetVisualization(projectm_visualization_);
+
+  // Settings menu
+  menu_->addAction(IconLoader::Load(QStringLiteral("view-fullscreen")), tr("Toggle fullscreen"), this, &VisualizationContainer::ToggleFullscreen);
+
+  QMenu *fps_menu = menu_->addMenu(tr("Framerate"));
+  QActionGroup *fps_group = new QActionGroup(this);
+  AddFramerateMenuItem(tr("Low (%1 fps)").arg(kLowFramerate), kLowFramerate, fps_, fps_group);
+  AddFramerateMenuItem(tr("Medium (%1 fps)").arg(kMediumFramerate), kMediumFramerate, fps_, fps_group);
+  AddFramerateMenuItem(tr("High (%1 fps)").arg(kHighFramerate), kHighFramerate, fps_, fps_group);
+  AddFramerateMenuItem(tr("Super high (%1 fps)").arg(kSuperHighFramerate), kSuperHighFramerate, fps_, fps_group);
+  fps_menu->addActions(fps_group->actions());
+
+  QMenu *quality_menu = menu_->addMenu(tr("Quality", "Visualization quality"));
+  QActionGroup *quality_group = new QActionGroup(this);
+  AddQualityMenuItem(tr("Low (256x256)"), 256, size_, quality_group);
+  AddQualityMenuItem(tr("Medium (512x512)"), 512, size_, quality_group);
+  AddQualityMenuItem(tr("High (1024x1024)"), 1024, size_, quality_group);
+  AddQualityMenuItem(tr("Super high (2048x2048)"), 2048, size_, quality_group);
+  quality_menu->addActions(quality_group->actions());
+
+  menu_->addAction(tr("Select visualizations..."), selector_, &VisualizationContainer::show);
+
+  menu_->addSeparator();
+  menu_->addAction(IconLoader::Load(QStringLiteral("application-exit")), tr("Close visualization"), this, &VisualizationContainer::hide);
+
+}
+
+void VisualizationContainer::AddFramerateMenuItem(const QString &name, const int value, const int def, QActionGroup *group) {
+
+  QAction *action = group->addAction(name);
+  action->setCheckable(true);
+  action->setChecked(value == def);
+  QObject::connect(action, &QAction::triggered, this, [this, value]() { SetFps(value); });
+
+}
+
+void VisualizationContainer::AddQualityMenuItem(const QString &name, const int value, const int def, QActionGroup *group) {
+
+  QAction *action = group->addAction(name);
+  action->setCheckable(true);
+  action->setChecked(value == def);
+  QObject::connect(action, &QAction::triggered, this, [this, value]() { SetQuality(value); });
+
+}
+
+void VisualizationContainer::SetEngine(GstEngine *engine) {
+
+  engine_ = engine;
+
+  if (isVisible()) engine_->AddBufferConsumer(projectm_visualization_);
+
+}
+
+void VisualizationContainer::showEvent(QShowEvent *e) {
+
+  qLog(Debug) << "Showing visualization";
+
+  QGraphicsView::showEvent(e);
+
+  update_timer_.start(1000 / fps_, this);
+
+  if (engine_) engine_->AddBufferConsumer(projectm_visualization_);
+
+}
+
+void VisualizationContainer::hideEvent(QHideEvent *e) {
+
+  qLog(Debug) << "Hiding visualization";
+
+  QGraphicsView::hideEvent(e);
+
+  update_timer_.stop();
+
+  if (engine_) engine_->RemoveBufferConsumer(projectm_visualization_);
+
+}
+
+void VisualizationContainer::closeEvent(QCloseEvent *e) {
+
+  Q_UNUSED(e);
+
+  // Don't close the window. Just hide it.
+  e->ignore();
+  hide();
+
+}
+
+void VisualizationContainer::resizeEvent(QResizeEvent *e) {
+  QGraphicsView::resizeEvent(e);
+  SizeChanged();
+}
+
+void VisualizationContainer::SizeChanged() {
+
+  // Save the geometry
+  Settings s;
+  s.beginGroup(kSettingsGroup);
+  s.setValue("geometry", saveGeometry());
+
+  // Resize the scene
+  if (scene()) scene()->setSceneRect(QRect(QPoint(0, 0), size()));
+
+  // Resize the overlay
+  if (overlay_) overlay_->resize(size());
+
+}
+
+void VisualizationContainer::timerEvent(QTimerEvent *e) {
+
+  QGraphicsView::timerEvent(e);
+  if (e->timerId() == update_timer_.timerId()) scene()->update();
+
+}
+
+void VisualizationContainer::SetActions(QAction *previous, QAction *play_pause, QAction *stop, QAction *next) {
+  overlay_->SetActions(previous, play_pause, stop, next);
+}
+
+void VisualizationContainer::SongMetadataChanged(const Song &metadata) {
+  overlay_->SetSongTitle(QStringLiteral("%1 - %2").arg(metadata.artist(), metadata.title()));
+}
+
+void VisualizationContainer::Stopped() {
+  overlay_->SetSongTitle(tr("strawberry"));
+}
+
+void VisualizationContainer::ChangeOverlayOpacity(const qreal value) {
+
+  overlay_proxy_->setOpacity(value);
+
+  // Hide the cursor if the overlay is hidden
+  if (value < 0.5) {
+    viewport()->setCursor(Qt::BlankCursor);
+  }
+  else {
+    viewport()->unsetCursor();
+  }
+
+
+}
+
+void VisualizationContainer::enterEvent(QEnterEvent *e) {
+
+  QGraphicsView::enterEvent(e);
+
+  overlay_->SetVisible(true);
+
+}
+
+void VisualizationContainer::leaveEvent(QEvent *e) {
+  QGraphicsView::leaveEvent(e);
+  overlay_->SetVisible(false);
+}
+
+void VisualizationContainer::mouseMoveEvent(QMouseEvent *e) {
+  QGraphicsView::mouseMoveEvent(e);
+  overlay_->SetVisible(true);
+}
+
+void VisualizationContainer::mouseDoubleClickEvent(QMouseEvent *e) {
+  QGraphicsView::mouseDoubleClickEvent(e);
+  ToggleFullscreen();
+}
+
+void VisualizationContainer::contextMenuEvent(QContextMenuEvent *event) {
+  QGraphicsView::contextMenuEvent(event);
+  ShowPopupMenu(event->pos());
+}
+
+void VisualizationContainer::keyReleaseEvent(QKeyEvent *event) {
+
+  if (event->matches(QKeySequence::Close) || event->key() == Qt::Key_Escape) {
+    if (isFullScreen()) {
+      ToggleFullscreen();
+    }
+    else {
+      hide();
+    }
+    return;
+  }
+
+  QGraphicsView::keyReleaseEvent(event);
+
+}
+
+void VisualizationContainer::ToggleFullscreen() {
+
+  setWindowState(windowState() ^ Qt::WindowFullScreen);
+
+}
+
+void VisualizationContainer::SetFps(const int fps) {
+
+  fps_ = fps;
+
+  // Save settings
+  Settings s;
+  s.beginGroup(kSettingsGroup);
+  s.setValue("fps", fps_);
+
+  update_timer_.stop();
+  update_timer_.start(1000 / fps_, this);
+
+}
+
+void VisualizationContainer::ShowPopupMenu(const QPoint &pos) {
+  menu_->popup(mapToGlobal(pos));
+}
+
+void VisualizationContainer::SetQuality(const int size) {
+
+  size_ = size;
+
+  // Save settings
+  Settings s;
+  s.beginGroup(kSettingsGroup);
+  s.setValue("size", size_);
+
+  projectm_visualization_->SetTextureSize(size_);
+
+}

src/visualizations/visualizationcontainer.h

@@ -0,0 +1,103 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef VISUALIZATIONCONTAINER_H
+#define VISUALIZATIONCONTAINER_H
+
+#include "config.h"
+
+#include <QBasicTimer>
+#include <QGraphicsView>
+
+#include "core/song.h"
+
+class GstEngine;
+class ProjectMVisualization;
+class VisualizationOverlay;
+class VisualizationSelector;
+
+class QMenu;
+class QActionGroup;
+class QEvent;
+class QShowEvent;
+class QHideEvent;
+class QCloseEvent;
+class QResizeEvent;
+class QTimerEvent;
+class QMouseEvent;
+class QContextMenuEvent;
+class QKeyEvent;
+class QEnterEvent;
+
+class VisualizationContainer : public QGraphicsView {
+  Q_OBJECT
+
+ public:
+  explicit VisualizationContainer(QWidget *parent = nullptr);
+
+  static const char *kSettingsGroup;
+
+  void SetEngine(GstEngine *engine);
+  void SetActions(QAction *previous, QAction *play_pause, QAction *stop, QAction *next);
+
+ public Q_SLOTS:
+  void SongMetadataChanged(const Song &metadata);
+  void Stopped();
+
+ protected:
+  // QWidget
+  void showEvent(QShowEvent *e) override;
+  void hideEvent(QHideEvent *e) override;
+  void closeEvent(QCloseEvent *e) override;
+  void resizeEvent(QResizeEvent *e) override;
+  void timerEvent(QTimerEvent *e) override;
+  void mouseMoveEvent(QMouseEvent *e) override;
+  void enterEvent(QEnterEvent *e) override;
+  void leaveEvent(QEvent *e) override;
+  void mouseDoubleClickEvent(QMouseEvent *e) override;
+  void contextMenuEvent(QContextMenuEvent *event) override;
+  void keyReleaseEvent(QKeyEvent *event) override;
+
+ private:
+  void SizeChanged();
+  void AddFramerateMenuItem(const QString &name, int value, int def, QActionGroup *group);
+  void AddQualityMenuItem(const QString &name, int value, int def, QActionGroup *group);
+
+ private Q_SLOTS:
+  void ChangeOverlayOpacity(qreal value);
+  void ShowPopupMenu(const QPoint &pos);
+  void ToggleFullscreen();
+  void SetFps(const int fps);
+  void SetQuality(const int size);
+
+ private:
+  ProjectMVisualization *projectm_visualization_;
+  VisualizationOverlay *overlay_;
+  VisualizationSelector *selector_;
+  QGraphicsProxyWidget *overlay_proxy_;
+  GstEngine *engine_;
+  QMenu *menu_;
+  QBasicTimer update_timer_;
+  int fps_;
+  int size_;
+};
+
+#endif  // VISUALIZATIONCONTAINER_H

src/visualizations/visualizationopenglwidget.cpp

@@ -0,0 +1,39 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <QtGlobal>
+
+#include "visualizationopenglwidget.h"
+#include "projectmvisualization.h"
+
+VisualizationOpenGLWidget::VisualizationOpenGLWidget(ProjectMVisualization *projectm_visualization, QWidget *parent, Qt::WindowFlags f)
+  : QOpenGLWidget(parent, f),
+    projectm_visualization_(projectm_visualization) {}
+
+void VisualizationOpenGLWidget::initializeGL() {
+
+  projectm_visualization_->Init();
+
+  QOpenGLWidget::initializeGL();
+
+  glEnable(GL_BLEND);
+
+}

src/visualizations/visualizationopenglwidget.h

@@ -0,0 +1,42 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef VISUALIZATIONOPENGLWIDGET_H
+#define VISUALIZATIONOPENGLWIDGET_H
+
+#include "config.h"
+
+#include <QOpenGLWidget>
+
+class ProjectMVisualization;
+
+class VisualizationOpenGLWidget : public QOpenGLWidget {
+  Q_OBJECT
+
+ public:
+  explicit VisualizationOpenGLWidget(ProjectMVisualization *projectm_visualization, QWidget *parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags());
+
+ protected:
+  void initializeGL() override;
+
+ private:
+  ProjectMVisualization *projectm_visualization_;
+};
+
+#endif  // VISUALIZATIONOPENGLWIDGET_H

src/visualizations/visualizationoverlay.cpp

@@ -0,0 +1,116 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <QString>
+#include <QBasicTimer>
+#include <QTimeLine>
+#include <QGraphicsProxyWidget>
+#include <QTimerEvent>
+#include <QMouseEvent>
+
+#include "core/iconloader.h"
+#include "visualizationoverlay.h"
+#include "ui_visualizationoverlay.h"
+
+namespace {
+constexpr int kFadeDuration = 500;
+constexpr int kFadeTimeout = 5000;
+}
+
+VisualizationOverlay::VisualizationOverlay(QWidget *parent)
+    : QWidget(parent),
+      ui_(new Ui_VisualizationOverlay),
+      fade_timeline_(new QTimeLine(kFadeDuration, this)),
+      visible_(false) {
+
+  ui_->setupUi(this);
+
+  setAttribute(Qt::WA_TranslucentBackground);
+  setMouseTracking(true);
+
+  ui_->settings->setIcon(IconLoader::Load(QStringLiteral("configure")));
+
+  QObject::connect(ui_->settings, &QToolButton::clicked, this, &VisualizationOverlay::ShowSettingsMenu);
+  QObject::connect(fade_timeline_, &QTimeLine::valueChanged, this, &VisualizationOverlay::OpacityChanged);
+
+}
+
+VisualizationOverlay::~VisualizationOverlay() { delete ui_; }
+
+QGraphicsProxyWidget *VisualizationOverlay::title(QGraphicsProxyWidget *proxy) const {
+  return proxy->createProxyForChildWidget(ui_->song_title);
+}
+
+void VisualizationOverlay::SetActions(QAction *previous, QAction *play_pause, QAction *stop, QAction *next) {
+
+  ui_->previous->setDefaultAction(previous);
+  ui_->play_pause->setDefaultAction(play_pause);
+  ui_->stop->setDefaultAction(stop);
+  ui_->next->setDefaultAction(next);
+
+}
+
+void VisualizationOverlay::ShowSettingsMenu() {
+
+  Q_EMIT ShowPopupMenu(ui_->settings->mapToGlobal(ui_->settings->rect().bottomLeft()));
+
+}
+
+void VisualizationOverlay::timerEvent(QTimerEvent *e) {
+
+  QWidget::timerEvent(e);
+
+  if (e->timerId() == fade_out_timeout_.timerId()) {
+    SetVisible(false);
+  }
+
+}
+
+void VisualizationOverlay::SetVisible(const bool visible) {
+
+  // If we're showing the overlay, then fade out again in a little while
+  fade_out_timeout_.stop();
+  if (visible) fade_out_timeout_.start(kFadeTimeout, this);
+
+  // Don't change to the state we're in already
+  if (visible == visible_) return;
+  visible_ = visible;
+
+  // If there's already another fader running then start from the same time that one was already at.
+  int start_time = visible ? 0 : fade_timeline_->duration();
+  if (fade_timeline_->state() == QTimeLine::Running)
+    start_time = fade_timeline_->currentTime();
+
+  fade_timeline_->stop();
+  fade_timeline_->setDirection(visible ? QTimeLine::Forward : QTimeLine::Backward);
+  fade_timeline_->setCurrentTime(start_time);
+  fade_timeline_->resume();
+
+}
+
+void VisualizationOverlay::SetSongTitle(const QString &title) {
+
+  ui_->song_title->setText(title);
+  SetVisible(true);
+
+}

src/visualizations/visualizationoverlay.h

@@ -0,0 +1,71 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef VISUALIZATIONOVERLAY_H
+#define VISUALIZATIONOVERLAY_H
+
+#include "config.h"
+
+#include <QWidget>
+#include <QString>
+#include <QBasicTimer>
+
+class Ui_VisualizationOverlay;
+
+class QGraphicsProxyWidget;
+class QTimeLine;
+class QAction;
+
+class VisualizationOverlay : public QWidget {
+  Q_OBJECT
+
+ public:
+  explicit VisualizationOverlay(QWidget *parent = nullptr);
+  ~VisualizationOverlay();
+
+  QGraphicsProxyWidget *title(QGraphicsProxyWidget *proxy) const;
+
+  void SetActions(QAction *previous, QAction *play_pause, QAction *stop, QAction *next);
+  void SetSongTitle(const QString &title);
+
+ public Q_SLOTS:
+  void SetVisible(const bool visible);
+
+ Q_SIGNALS:
+  void OpacityChanged(const qreal value);
+  void ShowPopupMenu(const QPoint &pos);
+
+ protected:
+  // QWidget
+  void timerEvent(QTimerEvent *e);
+
+ private Q_SLOTS:
+  void ShowSettingsMenu();
+
+ private:
+  Ui_VisualizationOverlay *ui_;
+
+  QTimeLine *fade_timeline_;
+  QBasicTimer fade_out_timeout_;
+  bool visible_;
+};
+
+#endif  // VISUALIZATIONOVERLAY_H

src/visualizations/visualizationoverlay.ui

@@ -0,0 +1,234 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>VisualizationOverlay</class>
+ <widget class="QWidget" name="VisualizationOverlay">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>523</width>
+    <height>302</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <property name="styleSheet">
+   <string notr="true">VisualizationOverlay {
+  background-color: transparent;
+}
+
+#frame {
+  background-color: rgba(96, 59, 25, 70%);
+  border-top-left-radius: 10px;
+  border-top-right-radius: 10px;
+  border-color: rgba(145, 89, 38, 100%);
+  border-width: 4px 4px 0px 4px;
+  border-style: solid;
+}
+
+#song_title {
+  font-weight: bold;
+  font-size: 20px;
+  color: #feae65;
+}
+
+QToolButton {
+  background: transparent;
+  border: none;
+}</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout_2">
+   <property name="margin">
+    <number>0</number>
+   </property>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>210</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout_3">
+     <item>
+      <spacer name="horizontalSpacer">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QFrame" name="frame">
+       <property name="frameShape">
+        <enum>QFrame::StyledPanel</enum>
+       </property>
+       <property name="frameShadow">
+        <enum>QFrame::Raised</enum>
+       </property>
+       <layout class="QVBoxLayout" name="verticalLayout">
+        <item>
+         <widget class="QLabel" name="song_title">
+          <property name="text">
+           <string>Strawberry</string>
+          </property>
+          <property name="alignment">
+           <set>Qt::AlignCenter</set>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <layout class="QHBoxLayout" name="horizontalLayout_2">
+          <item>
+           <spacer name="horizontalSpacer_5">
+            <property name="orientation">
+             <enum>Qt::Horizontal</enum>
+            </property>
+            <property name="sizeType">
+             <enum>QSizePolicy::Preferred</enum>
+            </property>
+            <property name="sizeHint" stdset="0">
+             <size>
+              <width>40</width>
+              <height>20</height>
+             </size>
+            </property>
+           </spacer>
+          </item>
+          <item>
+           <widget class="QWidget" name="widget" native="true">
+            <property name="sizePolicy">
+             <sizepolicy hsizetype="Maximum" vsizetype="Preferred">
+              <horstretch>0</horstretch>
+              <verstretch>0</verstretch>
+             </sizepolicy>
+            </property>
+            <layout class="QHBoxLayout" name="horizontalLayout">
+             <property name="margin">
+              <number>0</number>
+             </property>
+             <item>
+              <widget class="QToolButton" name="previous">
+               <property name="iconSize">
+                <size>
+                 <width>24</width>
+                 <height>24</height>
+                </size>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QToolButton" name="play_pause">
+               <property name="iconSize">
+                <size>
+                 <width>24</width>
+                 <height>24</height>
+                </size>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QToolButton" name="stop">
+               <property name="iconSize">
+                <size>
+                 <width>24</width>
+                 <height>24</height>
+                </size>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QToolButton" name="next">
+               <property name="iconSize">
+                <size>
+                 <width>24</width>
+                 <height>24</height>
+                </size>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <spacer name="horizontalSpacer_3">
+               <property name="orientation">
+                <enum>Qt::Horizontal</enum>
+               </property>
+               <property name="sizeType">
+                <enum>QSizePolicy::Fixed</enum>
+               </property>
+               <property name="sizeHint" stdset="0">
+                <size>
+                 <width>20</width>
+                 <height>13</height>
+                </size>
+               </property>
+              </spacer>
+             </item>
+             <item>
+              <widget class="QToolButton" name="settings">
+               <property name="toolTip">
+                <string>Visualizations Settings</string>
+               </property>
+               <property name="iconSize">
+                <size>
+                 <width>24</width>
+                 <height>24</height>
+                </size>
+               </property>
+              </widget>
+             </item>
+            </layout>
+           </widget>
+          </item>
+          <item>
+           <spacer name="horizontalSpacer_4">
+            <property name="orientation">
+             <enum>Qt::Horizontal</enum>
+            </property>
+            <property name="sizeType">
+             <enum>QSizePolicy::Preferred</enum>
+            </property>
+            <property name="sizeHint" stdset="0">
+             <size>
+              <width>40</width>
+              <height>20</height>
+             </size>
+            </property>
+           </spacer>
+          </item>
+         </layout>
+        </item>
+       </layout>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer_2">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

src/visualizations/visualizationselector.cpp

@@ -0,0 +1,88 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <QPushButton>
+
+#include "visualizationselector.h"
+#include "projectmpresetmodel.h"
+#include "projectmvisualization.h"
+#include "ui_visualizationselector.h"
+
+VisualizationSelector::VisualizationSelector(QWidget *parent)
+    : QDialog(parent),
+      ui_(new Ui_VisualizationSelector),
+      projectm_visualization_(nullptr),
+      select_all_(nullptr),
+      select_none_(nullptr) {
+
+  ui_->setupUi(this);
+
+  select_all_ = ui_->buttonBox->addButton(tr("Select All"), QDialogButtonBox::ActionRole);
+  select_none_ = ui_->buttonBox->addButton(tr("Select None"), QDialogButtonBox::ActionRole);
+  QObject::connect(select_all_, &QPushButton::clicked, this, &VisualizationSelector::SelectAll);
+  QObject::connect(select_none_, &QPushButton::clicked, this, &VisualizationSelector::SelectNone);
+  select_all_->setEnabled(false);
+  select_none_->setEnabled(false);
+
+  QObject::connect(ui_->mode, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &VisualizationSelector::ModeChanged);
+
+}
+
+VisualizationSelector::~VisualizationSelector() { delete ui_; }
+
+void VisualizationSelector::showEvent(QShowEvent *e) {
+
+  Q_UNUSED(e);
+
+  if (!ui_->list->model()) {
+    ui_->delay->setValue(projectm_visualization_->duration());
+    ui_->list->setModel(projectm_visualization_->preset_model());
+    QObject::connect(ui_->list->selectionModel(), &QItemSelectionModel::currentChanged, projectm_visualization_->preset_model(), &ProjectMPresetModel::SetImmediatePreset);
+    QObject::connect(ui_->delay, QOverload<int>::of(&QSpinBox::valueChanged), projectm_visualization_, &ProjectMVisualization::SetDuration);
+
+    ui_->mode->setCurrentIndex(static_cast<int>(projectm_visualization_->mode()));
+  }
+
+  projectm_visualization_->Lock(true);
+
+}
+
+void VisualizationSelector::hideEvent(QHideEvent *e) {
+  Q_UNUSED(e);
+  projectm_visualization_->Lock(false);
+}
+
+void VisualizationSelector::ModeChanged(const int mode) {
+
+  const bool enabled = mode == 1;
+  ui_->list->setEnabled(enabled);
+  select_all_->setEnabled(enabled);
+  select_none_->setEnabled(enabled);
+
+  projectm_visualization_->SetMode(static_cast<ProjectMVisualization::Mode>(mode));
+
+}
+
+void VisualizationSelector::SelectAll() { projectm_visualization_->preset_model()->SelectAll(); }
+
+void VisualizationSelector::SelectNone() { projectm_visualization_->preset_model()->SelectNone(); }

src/visualizations/visualizationselector.h

@@ -0,0 +1,61 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2024, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef VISUALIZATIONSELECTOR_H
+#define VISUALIZATIONSELECTOR_H
+
+#include "config.h"
+
+#include <QDialog>
+
+class QPushButton;
+class QShowEvent;
+class QHideEvent;
+
+class ProjectMVisualization;
+class Ui_VisualizationSelector;
+
+class VisualizationSelector : public QDialog {
+  Q_OBJECT
+
+ public:
+  explicit VisualizationSelector(QWidget *parent = nullptr);
+  ~VisualizationSelector();
+
+  void SetVisualization(ProjectMVisualization *projectm_visualization) { projectm_visualization_ = projectm_visualization; }
+
+ protected:
+  void showEvent(QShowEvent *e) override;
+  void hideEvent(QHideEvent *e) override;
+
+ private Q_SLOTS:
+  void ModeChanged(const int mode);
+  void SelectAll();
+  void SelectNone();
+
+ private:
+  Ui_VisualizationSelector *ui_;
+  ProjectMVisualization *projectm_visualization_;
+  QPushButton *select_all_;
+  QPushButton *select_none_;
+};
+
+#endif  // VISUALIZATIONSELECTOR_H

src/visualizations/visualizationselector.ui

@@ -0,0 +1,140 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>VisualizationSelector</class>
+ <widget class="QDialog" name="VisualizationSelector">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>595</width>
+    <height>475</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Select visualizations</string>
+  </property>
+  <property name="windowIcon">
+   <iconset resource="../../data/data.qrc">
+    <normaloff>:/icon.png</normaloff>:/icon.png</iconset>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <layout class="QFormLayout" name="formLayout">
+     <item row="0" column="0">
+      <widget class="QLabel" name="label">
+       <property name="text">
+        <string>Visualization mode</string>
+       </property>
+      </widget>
+     </item>
+     <item row="0" column="1">
+      <widget class="QComboBox" name="mode">
+       <item>
+        <property name="text">
+         <string>Random visualization</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Choose from the list</string>
+        </property>
+       </item>
+      </widget>
+     </item>
+     <item row="1" column="0">
+      <widget class="QLabel" name="label_2">
+       <property name="text">
+        <string>Delay between visualizations</string>
+       </property>
+      </widget>
+     </item>
+     <item row="1" column="1">
+      <widget class="QSpinBox" name="delay">
+       <property name="suffix">
+        <string> seconds</string>
+       </property>
+       <property name="minimum">
+        <number>2</number>
+       </property>
+       <property name="maximum">
+        <number>120</number>
+       </property>
+       <property name="value">
+        <number>15</number>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QListView" name="list">
+     <property name="enabled">
+      <bool>false</bool>
+     </property>
+     <property name="alternatingRowColors">
+      <bool>true</bool>
+     </property>
+     <property name="selectionBehavior">
+      <enum>QAbstractItemView::SelectRows</enum>
+     </property>
+     <property name="uniformItemSizes">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <tabstops>
+  <tabstop>mode</tabstop>
+  <tabstop>delay</tabstop>
+  <tabstop>list</tabstop>
+  <tabstop>buttonBox</tabstop>
+ </tabstops>
+ <resources>
+  <include location="../../data/data.qrc"/>
+ </resources>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>VisualizationSelector</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>VisualizationSelector</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>