modules/misc/notify/msn.c

   1 /*****************************************************************************
   2  * msn.c : msn title plugin
   3  *****************************************************************************
   4  * Copyright (C) 2005-2010 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea -at- videolan -dot- org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_interface.h>
  35 #include <vlc_meta.h>
  36 #include <vlc_playlist.h>
  37 #include <vlc_strings.h>
  38 #include <vlc_charset.h>
  39
  40 /*****************************************************************************
  41  * intf_sys_t: description and status of log interface
  42  *****************************************************************************/
  43 struct intf_sys_t
  44 {
  45     char *psz_format;
  46 };
  47
  48 /*****************************************************************************
  49  * Local prototypes
  50  *****************************************************************************/
  51 static int  Open    ( vlc_object_t * );
  52 static void Close   ( vlc_object_t * );
  53
  54 static int ItemChange( vlc_object_t *, const char *,
  55                        vlc_value_t, vlc_value_t, void * );
  56 static int SendToMSN( const char * psz_msg );
  57
  58 #define MSN_MAX_LENGTH 256
  59
  60 /*****************************************************************************
  61  * Module descriptor
  62  *****************************************************************************
  63  * This module should be used on windows with MSN (i think that you need to
  64  * have MSN 7 or newer) to "advertise" what you are playing in VLC.
  65  * You need to enable the "What I'm Listening To" option in MSN.
  66  *****************************************************************************/
  67 #define FORMAT_DEFAULT "{0} - {1}"
  68 #define FORMAT_TEXT N_("Title format string")
  69 #define FORMAT_LONGTEXT N_("Format of the string to send to MSN " \
  70 "{0} Artist, {1} Title, {2} Album. Defaults to \"Artist - Title\" ({0} - {1}).")
  71
  72 vlc_module_begin ()
  73     set_category( CAT_INTERFACE )
  74     set_subcategory( SUBCAT_INTERFACE_CONTROL )
  75     set_shortname( "MSN" )
  76     set_description( N_("MSN Now-Playing") )
  77
  78     add_string( "msn-format", FORMAT_DEFAULT,
  79                 FORMAT_TEXT, FORMAT_LONGTEXT, false )
  80
  81     set_capability( "interface", 0 )
  82     set_callbacks( Open, Close )
  83 vlc_module_end ()
  84
  85 /*****************************************************************************
  86  * Open: initialize and create stuff
  87  *****************************************************************************/
  88 static int Open( vlc_object_t *p_this )
  89 {
  90     intf_thread_t *p_intf = (intf_thread_t *)p_this;
  91     playlist_t *p_playlist;
  92
  93     p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
  94     if( !p_intf->p_sys )
  95         return VLC_ENOMEM;
  96
  97     p_intf->p_sys->psz_format = var_InheritString( p_intf, "msn-format" );
  98     if( !p_intf->p_sys->psz_format )
  99     {
 100         msg_Dbg( p_intf, "no format provided" );
 101         p_intf->p_sys->psz_format = strdup( FORMAT_DEFAULT );
 102     }
 103     msg_Dbg( p_intf, "using format: %s", p_intf->p_sys->psz_format );
 104
 105     p_playlist = pl_Get( p_intf );
 106     var_AddCallback( p_playlist, "item-change", ItemChange, p_intf );
 107     var_AddCallback( p_playlist, "item-current", ItemChange, p_intf );
 108
 109     return VLC_SUCCESS;
 110 }
 111
 112 /*****************************************************************************
 113  * Close: destroy interface stuff
 114  *****************************************************************************/
 115 static void Close( vlc_object_t *p_this )
 116 {
 117     intf_thread_t *p_intf = (intf_thread_t *)p_this;
 118     playlist_t *p_playlist = pl_Get( p_this );
 119
 120     /* clear the MSN stuff ... else it looks like we're still playing
 121      * something although VLC (or the MSN plugin) is closed */
 122     SendToMSN( "\\0Music\\01\\0\\0\\0\\0\\0\\0\\0" );
 123
 124     var_DelCallback( p_playlist, "item-change", ItemChange, p_intf );
 125     var_DelCallback( p_playlist, "item-current", ItemChange, p_intf );
 126
 127     /* Destroy structure */
 128     free( p_intf->p_sys->psz_format );
 129     free( p_intf->p_sys );
 130 }
 131
 132 /*****************************************************************************
 133  * ItemChange: Playlist item change callback
 134  *****************************************************************************/
 135 static int ItemChange( vlc_object_t *p_this, const char *psz_var,
 136                        vlc_value_t oldval, vlc_value_t newval, void *param )
 137 {
 138     (void)psz_var;    (void)oldval;    (void)newval;
 139     intf_thread_t *p_intf = (intf_thread_t *)param;
 140     char psz_tmp[MSN_MAX_LENGTH];
 141     input_thread_t *p_input =  playlist_CurrentInput( (playlist_t *) p_this );
 142
 143     if( !p_input ) return VLC_SUCCESS;
 144
 145     if( p_input->b_dead || !input_GetItem(p_input)->psz_name )
 146     {
 147         /* Not playing anything ... */
 148         SendToMSN( "\\0Music\\01\\0\\0\\0\\0\\0\\0\\0" );
 149         vlc_object_release( p_input );
 150         return VLC_SUCCESS;
 151     }
 152
 153     /* Playing something ... */
 154     char *psz_artist = input_item_GetArtist( input_GetItem( p_input ) );
 155     char *psz_album = input_item_GetAlbum( input_GetItem( p_input ) );
 156     char *psz_title = input_item_GetTitleFbName( input_GetItem( p_input ) );
 157     char *psz_buf = str_format_meta( p_intf, p_intf->p_sys->psz_format );
 158
 159     snprintf( psz_tmp,
 160               MSN_MAX_LENGTH,
 161               "\\0Music\\01\\0%s\\0%s\\0%s\\0%s\\0\\0\\0",
 162               psz_buf,
 163               psz_artist ? psz_artist : "",
 164               psz_title ? psz_title : "",
 165               psz_album );
 166     free( psz_buf );
 167     free( psz_title );
 168     free( psz_artist );
 169     free( psz_album );
 170
 171     SendToMSN( (const char*)psz_tmp );
 172     vlc_object_release( p_input );
 173
 174     return VLC_SUCCESS;
 175 }
 176
 177 /*****************************************************************************
 178  * SendToMSN
 179  *****************************************************************************/
 180 static int SendToMSN( const char *psz_msg )
 181 {
 182     COPYDATASTRUCT msndata;
 183     HWND msnui = NULL;
 184
 185     wchar_t *wmsg = ToWide( psz_msg );
 186     if( unlikely(wmsg == NULL) )
 187         return VLC_ENOMEM;
 188
 189     msndata.dwData = 0x547;
 190     msndata.lpData = wmsg;
 191     msndata.cbData = (wcslen(wmsg) + 1) * 2;
 192
 193     while( ( msnui = FindWindowEx( NULL, msnui, "MsnMsgrUIManager", NULL ) ) )
 194     {
 195         SendMessage(msnui, WM_COPYDATA, (WPARAM)NULL, (LPARAM)&msndata);
 196     }
 197     free( wmsg );
 198     return VLC_SUCCESS;
 199 }