doc: libvlc: add a simple win32 app using set_hwnd()

doc/libvlc/win_player.c

+/* compile: cc win_player.c -o win_player.exe -L<path/libvlc> -lvlc */
+
+#include <windows.h>
+#include <assert.h>
+
+#include <vlc/vlc.h>
+
+#define SCREEN_WIDTH  1500
+#define SCREEN_HEIGHT  900
+
+static LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+    switch(message)
+    {
+        case WM_DESTROY:
+            PostQuitMessage(0);
+            return 0;
+    }
+
+    return DefWindowProc (hWnd, message, wParam, lParam);
+}
+
+int WINAPI WinMain(HINSTANCE hInstance,
+                   HINSTANCE hPrevInstance,
+                   LPSTR lpCmdLine,
+                   int nCmdShow)
+{
+    WNDCLASSEX wc;
+    char *file_path;
+    libvlc_instance_t *p_libvlc;
+    libvlc_media_t *p_media;
+    libvlc_media_player_t *p_mp;
+    (void)hPrevInstance;
+    HWND hWnd;
+
+    /* remove "" around the given path */
+    if (lpCmdLine[0] == '"')
+    {
+        file_path = strdup( lpCmdLine+1 );
+        if (file_path[strlen(file_path)-1] == '"')
+            file_path[strlen(file_path)-1] = '\0';
+    }
+    else
+        file_path = strdup( lpCmdLine );
+
+    p_libvlc = libvlc_new( 0, NULL );
+    p_media = libvlc_media_new_path( p_libvlc, file_path );
+    free( file_path );
+    p_mp = libvlc_media_player_new_from_media( p_media );
+
+    ZeroMemory(&wc, sizeof(WNDCLASSEX));
+
+    wc.cbSize = sizeof(WNDCLASSEX);
+    wc.style = CS_HREDRAW | CS_VREDRAW;
+    wc.lpfnWndProc = WindowProc;
+    wc.hInstance = hInstance;
+    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
+    wc.lpszClassName = "WindowClass";
+
+    RegisterClassEx(&wc);
+
+    RECT wr = {0, 0, SCREEN_WIDTH, SCREEN_HEIGHT};
+    AdjustWindowRect(&wr, WS_OVERLAPPEDWINDOW, FALSE);
+
+    hWnd = CreateWindowEx(0,
+                          "WindowClass",
+                          "libvlc Demo app",
+                          WS_OVERLAPPEDWINDOW,
+                          CW_USEDEFAULT, CW_USEDEFAULT,
+                          wr.right - wr.left,
+                          wr.bottom - wr.top,
+                          NULL,
+                          NULL,
+                          hInstance,
+                          NULL);
+
+    libvlc_media_player_set_hwnd(p_mp, hWnd);
+
+    ShowWindow(hWnd, nCmdShow);
+
+    libvlc_media_player_play( p_mp );
+
+    MSG msg;
+    while (GetMessage(&msg, NULL, 0, 0))
+    {
+        TranslateMessage(&msg);
+        DispatchMessage(&msg);
+
+        if(msg.message == WM_QUIT)
+            break;
+    }
+
+    libvlc_media_player_stop_async( p_mp );
+
+    libvlc_media_player_release( p_mp );
+    libvlc_media_release( p_media );
+    libvlc_release( p_libvlc );
+
+    return msg.wParam;
+}