events.c

video linux conference

/*****************************************************************************
 * events.c: Windows DirectX video output events handler
 *****************************************************************************
 * Copyright (C) 2001-2004 VideoLAN
 * $Id: events.c 10831 2005-04-26 14:27:47Z gbazin $
 *
 * Authors: Gildas Bazin <[e-mail]>
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/


/*****************************************************************************
 * Preamble: This file contains the functions related to the creation of
 *             a window and the handling of its messages (events).
 *****************************************************************************/
#include <errno.h>                                                 /* ENOMEM */
#include <stdlib.h>                                                /* free() */
#include <ctype.h>                                              /* tolower() */
#include <string.h>                                            /* strerror() */

#ifndef _WIN32_WINNT
#   define _WIN32_WINNT 0x0400
#endif

#include <vlc/vlc.h>
#include <vlc/intf.h>
#include <vlc/input.h>
#include <vlc/vout.h>

#include <windows.h>
#include <windowsx.h>
#include <shellapi.h>

#include <ddraw.h>

#include "vlc_keys.h"
#include "vout.h"

/*****************************************************************************
 * Local prototypes.
 *****************************************************************************/
static int  DirectXCreateWindow( vout_thread_t *p_vout );
static void DirectXCloseWindow ( vout_thread_t *p_vout );
static long FAR PASCAL DirectXEventProc( HWND, UINT, WPARAM, LPARAM );

static int Control( vout_thread_t *p_vout, int i_query, va_list args );

static void DirectXPopupMenu( event_thread_t *p_event, vlc_bool_t b_open )
{
    playlist_t *p_playlist =
        vlc_object_find( p_event, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
    if( p_playlist != NULL )
    {
        vlc_value_t val;
        val.b_bool = b_open;
        var_Set( p_playlist, "intf-popupmenu", val );
        vlc_object_release( p_playlist );
    }
}

static int DirectXConvertKey( int i_key );

/*****************************************************************************
 * DirectXEventThread: Create video window & handle its messages
 *****************************************************************************
 * This function creates a video window and then enters an infinite loop
 * that handles the messages sent to that window.
 * The main goal of this thread is to isolate the Win32 PeekMessage function
 * because this one can block for a long time.
 *****************************************************************************/
void E_(DirectXEventThread)( event_thread_t *p_event )
{
    MSG msg;
    POINT old_mouse_pos = {0,0}, mouse_pos;
    vlc_value_t val;
    int i_width, i_height, i_x, i_y;
    HMODULE hkernel32;

    /* Initialisation */
    p_event->p_vout->pf_control = Control;

    /* Create a window for the video */
    /* Creating a window under Windows also initializes the thread's event
     * message queue */
    if( DirectXCreateWindow( p_event->p_vout ) )
    {
        msg_Err( p_event, "out of memory" );
        p_event->b_dead = VLC_TRUE;
    }

    /* Signal the creation of the window */
    vlc_thread_ready( p_event );

    /* Set power management stuff */
    if( (hkernel32 = GetModuleHandle( _T("KERNEL32") ) ) )
    {
        ULONG (WINAPI* OurSetThreadExecutionState)( ULONG );

        OurSetThreadExecutionState = (ULONG (WINAPI*)( ULONG ))
            GetProcAddress( hkernel32, _T("SetThreadExecutionState") );

        if( OurSetThreadExecutionState )
            /* Prevent monitor from powering off */
            OurSetThreadExecutionState( ES_DISPLAY_REQUIRED | ES_CONTINUOUS );
        else
            msg_Dbg( p_event, "no support for SetThreadExecutionState()" );
    }

    /* Main loop */
    /* GetMessage will sleep if there's no message in the queue */
    while( !p_event->b_die && GetMessage( &msg, 0, 0, 0 ) )
    {
        /* Check if we are asked to exit */
        if( p_event->b_die )
            break;

        switch( msg.message )
        {

        case WM_MOUSEMOVE:
            vout_PlacePicture( p_event->p_vout,
                               p_event->p_vout->p_sys->i_window_width,
                               p_event->p_vout->p_sys->i_window_height,
                               &i_x, &i_y, &i_width, &i_height );

            if( msg.hwnd == p_event->p_vout->p_sys->hvideownd )
            {
                /* Child window */
                i_x = i_y = 0;
            }

            if( i_width && i_height )
            {
                val.i_int = ( GET_X_LPARAM(msg.lParam) - i_x )
                             * p_event->p_vout->render.i_width / i_width;
                var_Set( p_event->p_vout, "mouse-x", val );
                val.i_int = ( GET_Y_LPARAM(msg.lParam) - i_y )
                             * p_event->p_vout->render.i_height / i_height;
                var_Set( p_event->p_vout, "mouse-y", val );

                val.b_bool = VLC_TRUE;
                var_Set( p_event->p_vout, "mouse-moved", val );
            }

        case WM_NCMOUSEMOVE:
            GetCursorPos( &mouse_pos );
            if( (abs(mouse_pos.x - old_mouse_pos.x) > 2 ||
                (abs(mouse_pos.y - old_mouse_pos.y)) > 2 ) )
            {
                GetCursorPos( &old_mouse_pos );
                p_event->p_vout->p_sys->i_lastmoved = mdate();

                if( p_event->p_vout->p_sys->b_cursor_hidden )
                {
                    p_event->p_vout->p_sys->b_cursor_hidden = 0;
                    ShowCursor( TRUE );
                }
            }
            break;

        case WM_VLC_HIDE_MOUSE:
            if( p_event->p_vout->p_sys->b_cursor_hidden ) break;
            p_event->p_vout->p_sys->b_cursor_hidden = VLC_TRUE;
            GetCursorPos( &old_mouse_pos );
            ShowCursor( FALSE );
            break;

        case WM_VLC_SHOW_MOUSE:
            if( !p_event->p_vout->p_sys->b_cursor_hidden ) break;
            p_event->p_vout->p_sys->b_cursor_hidden = VLC_FALSE;
            GetCursorPos( &old_mouse_pos );
            ShowCursor( TRUE );
            break;

        case WM_LBUTTONDOWN:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int |= 1;
            var_Set( p_event->p_vout, "mouse-button-down", val );
            DirectXPopupMenu( p_event, VLC_FALSE );
            break;

        case WM_LBUTTONUP:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int &= ~1;
            var_Set( p_event->p_vout, "mouse-button-down", val );

            val.b_bool = VLC_TRUE;
            var_Set( p_event->p_vout, "mouse-clicked", val );
            break;

        case WM_LBUTTONDBLCLK:
            p_event->p_vout->p_sys->i_changes |= VOUT_FULLSCREEN_CHANGE;
            break;

        case WM_MBUTTONDOWN:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int |= 2;
            var_Set( p_event->p_vout, "mouse-button-down", val );
            DirectXPopupMenu( p_event, VLC_FALSE );
            break;

        case WM_MBUTTONUP:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int &= ~2;
            var_Set( p_event->p_vout, "mouse-button-down", val );
            break;

        case WM_RBUTTONDOWN:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int |= 4;
            var_Set( p_event->p_vout, "mouse-button-down", val );
            DirectXPopupMenu( p_event, VLC_FALSE );
            break;

        case WM_RBUTTONUP:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int &= ~4;
            var_Set( p_event->p_vout, "mouse-button-down", val );
            DirectXPopupMenu( p_event, VLC_TRUE );
            break;

        case WM_KEYDOWN:
        case WM_SYSKEYDOWN:
            /* The key events are first processed here and not translated
             * into WM_CHAR events because we need to know the status of the
             * modifier keys. */
            val.i_int = DirectXConvertKey( msg.wParam );
            if( !val.i_int )
            {
                /* This appears to be a "normal" (ascii) key */
                val.i_int = tolower( MapVirtualKey( msg.wParam, 2 ) );
            }

            if( val.i_int )
            {
                if( GetKeyState(VK_CONTROL) & 0x8000 )
                {
                    val.i_int |= KEY_MODIFIER_CTRL;
                }
                if( GetKeyState(VK_SHIFT) & 0x8000 )
                {
                    val.i_int |= KEY_MODIFIER_SHIFT;
                }
                if( GetKeyState(VK_MENU) & 0x8000 )
                {
                    val.i_int |= KEY_MODIFIER_ALT;
                }

                var_Set( p_event->p_vlc, "key-pressed", val );
            }
            break;

        case WM_MOUSEWHEEL:
            if( GET_WHEEL_DELTA_WPARAM( msg.wParam ) > 0 )
            {
                val.i_int = KEY_MOUSEWHEELUP;
            }
            else
            {
                val.i_int = KEY_MOUSEWHEELDOWN;
            }
            if( val.i_int )
            {
                if( GetKeyState(VK_CONTROL) & 0x8000 )
                {
                    val.i_int |= KEY_MODIFIER_CTRL;
                }
                if( GetKeyState(VK_SHIFT) & 0x8000 )
                {
                    val.i_int |= KEY_MODIFIER_SHIFT;
                }
                if( GetKeyState(VK_MENU) & 0x8000 )
                {
                    val.i_int |= KEY_MODIFIER_ALT;
                }

                var_Set( p_event->p_vlc, "key-pressed", val );
            }
            break;

        case WM_VLC_CHANGE_TEXT:
            var_Get( p_event->p_vout, "video-title", &val );

            if( !val.psz_string || !*val.psz_string ) /* Default video title */
            {
#ifdef MODULE_NAME_IS_glwin32
                SetWindowText( p_event->p_vout->p_sys->hwnd,
                    _T(VOUT_TITLE) _T(" (OpenGL output)") );
#else
                if( p_event->p_vout->p_sys->b_using_overlay )
                    SetWindowText( p_event->p_vout->p_sys->hwnd, _T(VOUT_TITLE)
                        _T(" (hardware YUV overlay DirectX output)") );
                else if( p_event->p_vout->p_sys->b_hw_yuv )
                    SetWindowText( p_event->p_vout->p_sys->hwnd, _T(VOUT_TITLE)
                        _T(" (hardware YUV DirectX output)") );
                else
                    SetWindowText( p_event->p_vout->p_sys->hwnd, _T(VOUT_TITLE)
                        _T(" (software RGB DirectX output)") );
#endif
            }
            else
            {
                SetWindowText( p_event->p_vout->p_sys->hwnd, val.psz_string );