initial commit

.gitignore

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+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+
+# Cmake files
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+cmake_install.cmake
+install_manifest.txt
+CTestTestfile.cmake
+build
+
+# Clion files
+.idea/
+
+# VSCode files
+.vscode/

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.13)
+
+project(mpv-plugin)
+
+include(FindPkgConfig)
+pkg_search_module(MPV REQUIRED mpv>=0.37.0)
+
+set(CMAKE_SHARED_LIBRARY_PREFIX "")
+add_library(menu SHARED src/menu.c)
+target_include_directories(menu PRIVATE ${MPV_INCLUDE_DIRS})
+target_compile_definitions(menu PRIVATE MPV_CPLUGIN_DYNAMIC_SYM)

README.md

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+# mpv-plugin
+
+Prototype of contextmenu plugin for Windows based on [C PLUGINS](https://mpv.io/manual/master/#c-plugins) API.

src/menu.c

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+// clang menu.c -DMPV_CPLUGIN_DYNAMIC_SYM `pkg-config --cflags mpv` -shared -o menu.dll
+
+#include <windows.h>
+#include <windowsx.h>
+#include <mpv/client.h>
+
+#define MPV_EXPORT __declspec(dllexport)
+
+mpv_handle *mpv = NULL;
+HWND hwnd = NULL;
+WNDPROC wnd_proc = NULL;
+HMENU hmenu = NULL;
+
+struct menu_item {
+  char *name;
+  char *command;
+};
+
+struct menu_item menu_items[] = {
+    {"Play/Pause", "cycle pause"},
+    {"Stop", "stop"},
+    {"-", "ignore"},
+    {"Fullscreen", "cycle fullscreen"},
+    {"-", "ignore"},
+    {"Exit", "quit"},
+};
+
+LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
+  switch (uMsg) {
+    case WM_CONTEXTMENU:
+      RECT rc;
+      POINT pt = {GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)};
+
+      GetClientRect(hWnd, &rc);
+      ScreenToClient(hWnd, &pt);
+
+      if (PtInRect(&rc, pt)) {
+        ClientToScreen(hWnd, &pt);
+        TrackPopupMenu(hmenu, TPM_LEFTALIGN | TPM_LEFTBUTTON, pt.x, pt.y, 0, hWnd, NULL);
+      }
+      break;
+    case WM_COMMAND:
+      WORD menu_id = LOWORD(wParam);
+
+      if (menu_id >= 0 && menu_id < ARRAYSIZE(menu_items)) {
+        mpv_command_string(mpv, menu_items[menu_id].command);
+        return 0;
+      }
+      break;
+    default:
+      break;
+  }
+
+  return CallWindowProc(wnd_proc, hWnd, uMsg, wParam, lParam);
+}
+
+// TODO: Load menu from file
+HMENU load_menu() {
+  hmenu = CreatePopupMenu();
+
+  for (int i = 0; i < ARRAYSIZE(menu_items); i++) {
+    if (strcmp(menu_items[i].name, "-") == 0)
+      AppendMenu(hmenu, MF_SEPARATOR, 0, NULL);
+    else
+      AppendMenu(hmenu, MF_STRING, i, menu_items[i].name);
+  }
+
+  return hmenu;
+}
+
+void plugin_init(int64_t wid) {
+  hwnd = (HWND)wid;
+  hmenu = load_menu();
+  wnd_proc = (WNDPROC)SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)WndProc);
+}
+
+void plugin_destroy() {
+  if (hmenu) DestroyMenu(hmenu);
+  if (hwnd != NULL && wnd_proc != NULL) SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)wnd_proc);
+}
+
+MPV_EXPORT int mpv_open_cplugin(mpv_handle *handle) {
+  mpv = handle;
+  mpv_observe_property(mpv, 0, "window-id", MPV_FORMAT_INT64);
+
+  while (mpv) {
+    mpv_event *event = mpv_wait_event(mpv, -1);
+    if (event->event_id == MPV_EVENT_SHUTDOWN) break;
+
+    switch (event->event_id) {
+      case MPV_EVENT_PROPERTY_CHANGE:
+        mpv_event_property *prop = event->data;
+        if (prop->format == MPV_FORMAT_INT64 && strcmp(prop->name, "window-id") == 0) {
+          int64_t wid = *(int64_t *)prop->data;
+          if (wid > 0) plugin_init(wid);
+        }
+        break;
+      case MPV_EVENT_SHUTDOWN:
+        plugin_destroy();
+        break;
+      default:
+        break;
+    }
+  }
+
+  return 0;
+}