doc/libvlc/win_player.c

   1 /* compile: cc win_player.c -o win_player.exe -L<path/libvlc> -lvlc */
   2
   3 #include <windows.h>
   4 #include <assert.h>
   5
   6 #include <vlc/vlc.h>
   7
   8 #define SCREEN_WIDTH  1500
   9 #define SCREEN_HEIGHT  900
  10
  11 struct vlc_context
  12 {
  13     libvlc_instance_t     *p_libvlc;
  14     libvlc_media_player_t *p_mediaplayer;
  15 };
  16
  17
  18 static const char *AspectRatio = NULL;
  19
  20 static LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
  21 {
  22     if( message == WM_CREATE )
  23     {
  24         /* Store p_mediaplayer for future use */
  25         CREATESTRUCT *c = (CREATESTRUCT *)lParam;
  26         SetWindowLongPtr( hWnd, GWLP_USERDATA, (LONG_PTR)c->lpCreateParams );
  27         return 0;
  28     }
  29
  30     LONG_PTR p_user_data = GetWindowLongPtr( hWnd, GWLP_USERDATA );
  31     if( p_user_data == 0 )
  32         return DefWindowProc(hWnd, message, wParam, lParam);
  33     struct vlc_context *ctx = (struct vlc_context *)p_user_data;
  34
  35     switch(message)
  36     {
  37         case WM_DESTROY:
  38             PostQuitMessage(0);
  39             return 0;
  40         case WM_DROPFILES:
  41             {
  42                 HDROP hDrop = (HDROP)wParam;
  43                 char file_path[MAX_PATH];
  44                 libvlc_media_player_stop_async( ctx->p_mediaplayer );
  45
  46                 if (DragQueryFile(hDrop, 0, file_path, sizeof(file_path)))
  47                 {
  48                     libvlc_media_t *p_media = libvlc_media_new_path( ctx->p_libvlc, file_path );
  49                     libvlc_media_t *p_old_media = libvlc_media_player_get_media( ctx->p_mediaplayer );
  50                     libvlc_media_player_set_media( ctx->p_mediaplayer, p_media );
  51                     libvlc_media_release( p_old_media );
  52
  53                     libvlc_media_player_play( ctx->p_mediaplayer );
  54                 }
  55                 DragFinish(hDrop);
  56             }
  57             return 0;
  58         case WM_KEYDOWN:
  59         case WM_SYSKEYDOWN:
  60             {
  61                 int key = tolower( (unsigned char)MapVirtualKey( wParam, 2 ) );
  62                 if (key == 'a')
  63                 {
  64                     if (AspectRatio == NULL)
  65                         AspectRatio = "16:10";
  66                     else if (strcmp(AspectRatio,"16:10")==0)
  67                         AspectRatio = "16:9";
  68                     else if (strcmp(AspectRatio,"16:9")==0)
  69                         AspectRatio = "4:3";
  70                     else if (strcmp(AspectRatio,"4:3")==0)
  71                         AspectRatio = "185:100";
  72                     else if (strcmp(AspectRatio,"185:100")==0)
  73                         AspectRatio = "221:100";
  74                     else if (strcmp(AspectRatio,"221:100")==0)
  75                         AspectRatio = "235:100";
  76                     else if (strcmp(AspectRatio,"235:100")==0)
  77                         AspectRatio = "239:100";
  78                     else if (strcmp(AspectRatio,"239:100")==0)
  79                         AspectRatio = "5:3";
  80                     else if (strcmp(AspectRatio,"5:3")==0)
  81                         AspectRatio = "5:4";
  82                     else if (strcmp(AspectRatio,"5:4")==0)
  83                         AspectRatio = "1:1";
  84                     else if (strcmp(AspectRatio,"1:1")==0)
  85                         AspectRatio = NULL;
  86                     libvlc_video_set_aspect_ratio( ctx->p_mediaplayer, AspectRatio );
  87                 }
  88                 break;
  89             }
  90         default: break;
  91     }
  92
  93     return DefWindowProc (hWnd, message, wParam, lParam);
  94 }
  95
  96 int WINAPI WinMain(HINSTANCE hInstance,
  97                    HINSTANCE hPrevInstance,
  98                    LPSTR lpCmdLine,
  99                    int nCmdShow)
 100 {
 101     WNDCLASSEX wc;
 102     char *file_path;
 103     struct vlc_context Context;
 104     libvlc_media_t *p_media;
 105     (void)hPrevInstance;
 106     HWND hWnd;
 107
 108     /* remove "" around the given path */
 109     if (lpCmdLine[0] == '"')
 110     {
 111         file_path = strdup( lpCmdLine+1 );
 112         if (file_path[strlen(file_path)-1] == '"')
 113             file_path[strlen(file_path)-1] = '\0';
 114     }
 115     else
 116         file_path = strdup( lpCmdLine );
 117
 118     Context.p_libvlc = libvlc_new( 0, NULL );
 119     p_media = libvlc_media_new_path( Context.p_libvlc, file_path );
 120     free( file_path );
 121     Context.p_mediaplayer = libvlc_media_player_new_from_media( p_media );
 122
 123     ZeroMemory(&wc, sizeof(WNDCLASSEX));
 124
 125     wc.cbSize = sizeof(WNDCLASSEX);
 126     wc.style = CS_HREDRAW | CS_VREDRAW;
 127     wc.lpfnWndProc = WindowProc;
 128     wc.hInstance = hInstance;
 129     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 130     wc.lpszClassName = "WindowClass";
 131
 132     RegisterClassEx(&wc);
 133
 134     RECT wr = {0, 0, SCREEN_WIDTH, SCREEN_HEIGHT};
 135     AdjustWindowRect(&wr, WS_OVERLAPPEDWINDOW, FALSE);
 136
 137     hWnd = CreateWindowEx(0,
 138                           "WindowClass",
 139                           "libvlc Demo app",
 140                           WS_OVERLAPPEDWINDOW,
 141                           CW_USEDEFAULT, CW_USEDEFAULT,
 142                           wr.right - wr.left,
 143                           wr.bottom - wr.top,
 144                           NULL,
 145                           NULL,
 146                           hInstance,
 147                           &Context);
 148     DragAcceptFiles(hWnd, TRUE);
 149
 150     libvlc_media_player_set_hwnd(Context.p_mediaplayer, hWnd);
 151
 152     ShowWindow(hWnd, nCmdShow);
 153
 154     libvlc_media_player_play( Context.p_mediaplayer );
 155
 156     MSG msg;
 157     while (GetMessage(&msg, NULL, 0, 0))
 158     {
 159         TranslateMessage(&msg);
 160         DispatchMessage(&msg);
 161
 162         if(msg.message == WM_QUIT)
 163             break;
 164     }
 165
 166     libvlc_media_player_stop_async( Context.p_mediaplayer );
 167
 168     libvlc_media_release( libvlc_media_player_get_media( Context.p_mediaplayer ) );
 169     libvlc_media_player_release( Context.p_mediaplayer );
 170     libvlc_release( Context.p_libvlc );
 171
 172     return msg.wParam;
 173 }