directx.c

VLC媒体播放程序

    if( hmon )
    {
        var_Get( p_vout, "directx-device", &device );

        if( ( !device.psz_string || !*device.psz_string ) &&
            hmon == p_vout->p_sys->hmonitor )
        {
            if( device.psz_string ) free( device.psz_string );
        }
        else if( strcmp( psz_drivername, device.psz_string ) == 0 )
        {
            MONITORINFO monitor_info;
            monitor_info.cbSize = sizeof( MONITORINFO );

            if( p_vout->p_sys->GetMonitorInfo( hmon, &monitor_info ) )
            {
                RECT rect;

                /* Move window to the right screen */
                GetWindowRect( p_vout->p_sys->hwnd, &rect );
                if( !IntersectRect( &rect, &rect, &monitor_info.rcWork ) )
                {
                    rect.left = monitor_info.rcWork.left;
                    rect.top = monitor_info.rcWork.top;
                    msg_Dbg( p_vout, "DirectXEnumCallback: Setting window "
                             "position to %d,%d", rect.left, rect.top );
                    SetWindowPos( p_vout->p_sys->hwnd, NULL,
                                  rect.left, rect.top, 0, 0,
                                  SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
                }
            }

            p_vout->p_sys->hmonitor = hmon;
            if( device.psz_string ) free( device.psz_string );
        }
        else
        {
            if( device.psz_string ) free( device.psz_string );
            return TRUE; /* Keep enumerating */
        }

        msg_Dbg( p_vout, "selecting %s, %s", psz_desc, psz_drivername );
        p_vout->p_sys->p_display_driver = malloc( sizeof(GUID) );
        if( p_vout->p_sys->p_display_driver )
            memcpy( p_vout->p_sys->p_display_driver, p_guid, sizeof(GUID) );
    }

    return TRUE; /* Keep enumerating */
}

/*****************************************************************************
 * DirectXInitDDraw: Takes care of all the DirectDraw initialisations
 *****************************************************************************
 * This function initialise and allocate resources for DirectDraw.
 *****************************************************************************/
static int DirectXInitDDraw( vout_thread_t *p_vout )
{
    HRESULT dxresult;
    HRESULT (WINAPI *OurDirectDrawCreate)(GUID *,LPDIRECTDRAW *,IUnknown *);
    HRESULT (WINAPI *OurDirectDrawEnumerateEx)( LPDDENUMCALLBACKEXA, LPVOID,
                                                DWORD );
    LPDIRECTDRAW p_ddobject;

    msg_Dbg( p_vout, "DirectXInitDDraw" );

    /* Load direct draw DLL */
    p_vout->p_sys->hddraw_dll = LoadLibrary("DDRAW.DLL");
    if( p_vout->p_sys->hddraw_dll == NULL )
    {
        msg_Warn( p_vout, "DirectXInitDDraw failed loading ddraw.dll" );
        goto error;
    }

    OurDirectDrawCreate =
      (void *)GetProcAddress(p_vout->p_sys->hddraw_dll, "DirectDrawCreate");
    if( OurDirectDrawCreate == NULL )
    {
        msg_Err( p_vout, "DirectXInitDDraw failed GetProcAddress" );
        goto error;
    }

    OurDirectDrawEnumerateEx =
      (void *)GetProcAddress( p_vout->p_sys->hddraw_dll,
                              "DirectDrawEnumerateExA" );

    if( OurDirectDrawEnumerateEx && p_vout->p_sys->MonitorFromWindow )
    {
        vlc_value_t device;

        var_Get( p_vout, "directx-device", &device );
        if( device.psz_string )
        {
            msg_Dbg( p_vout, "directx-device: %s", device.psz_string );
            free( device.psz_string );
        }

        p_vout->p_sys->hmonitor =
            p_vout->p_sys->MonitorFromWindow( p_vout->p_sys->hwnd,
                                              MONITOR_DEFAULTTONEAREST );

        /* Enumerate displays */
        OurDirectDrawEnumerateEx( DirectXEnumCallback, p_vout,
                                  DDENUM_ATTACHEDSECONDARYDEVICES );
    }

    /* Initialize DirectDraw now */
    dxresult = OurDirectDrawCreate( p_vout->p_sys->p_display_driver,
                                    &p_ddobject, NULL );
    if( dxresult != DD_OK )
    {
        msg_Err( p_vout, "DirectXInitDDraw cannot initialize DDraw" );
        goto error;
    }

    /* Get the IDirectDraw2 interface */
    dxresult = IDirectDraw_QueryInterface( p_ddobject, &IID_IDirectDraw2,
                                        (LPVOID *)&p_vout->p_sys->p_ddobject );
    /* Release the unused interface */
    IDirectDraw_Release( p_ddobject );
    if( dxresult != DD_OK )
    {
        msg_Err( p_vout, "cannot get IDirectDraw2 interface" );
        goto error;
    }

    /* Set DirectDraw Cooperative level, ie what control we want over Windows
     * display */
    dxresult = IDirectDraw2_SetCooperativeLevel( p_vout->p_sys->p_ddobject,
                                                 NULL, DDSCL_NORMAL );
    if( dxresult != DD_OK )
    {
        msg_Err( p_vout, "cannot set direct draw cooperative level" );
        goto error;
    }

    /* Get the size of the current display device */
    if( p_vout->p_sys->hmonitor && p_vout->p_sys->GetMonitorInfo )
    {
        MONITORINFO monitor_info;
        monitor_info.cbSize = sizeof( MONITORINFO );
        p_vout->p_sys->GetMonitorInfo( p_vout->p_sys->hmonitor,
                                       &monitor_info );
        p_vout->p_sys->rect_display = monitor_info.rcMonitor;
    }
    else
    {
        p_vout->p_sys->rect_display.left = 0;
        p_vout->p_sys->rect_display.top = 0;
        p_vout->p_sys->rect_display.right  = GetSystemMetrics(SM_CXSCREEN);
        p_vout->p_sys->rect_display.bottom = GetSystemMetrics(SM_CYSCREEN);
    }

    msg_Dbg( p_vout, "screen dimensions (%ix%i,%ix%i)",
             p_vout->p_sys->rect_display.left,
             p_vout->p_sys->rect_display.top,
             p_vout->p_sys->rect_display.right,
             p_vout->p_sys->rect_display.bottom );

    /* Probe the capabilities of the hardware */
    DirectXGetDDrawCaps( p_vout );

    msg_Dbg( p_vout, "End DirectXInitDDraw" );
    return VLC_SUCCESS;

 error:
    if( p_vout->p_sys->p_ddobject )
        IDirectDraw2_Release( p_vout->p_sys->p_ddobject );
    if( p_vout->p_sys->hddraw_dll )
        FreeLibrary( p_vout->p_sys->hddraw_dll );
    p_vout->p_sys->hddraw_dll = NULL;
    p_vout->p_sys->p_ddobject = NULL;
    return VLC_EGENERIC;
}

/*****************************************************************************
 * DirectXCreateDisplay: create the DirectDraw display.
 *****************************************************************************
 * Create and initialize display according to preferences specified in the vout
 * thread fields.
 *****************************************************************************/
static int DirectXCreateDisplay( vout_thread_t *p_vout )
{
    HRESULT              dxresult;
    DDSURFACEDESC        ddsd;
    LPDIRECTDRAWSURFACE  p_display;

    msg_Dbg( p_vout, "DirectXCreateDisplay" );

    /* Now get the primary surface. This surface is what you actually see
     * on your screen */
    memset( &ddsd, 0, sizeof( DDSURFACEDESC ));
    ddsd.dwSize = sizeof(DDSURFACEDESC);
    ddsd.dwFlags = DDSD_CAPS;
    ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;

    dxresult = IDirectDraw2_CreateSurface( p_vout->p_sys->p_ddobject,
                                           &ddsd, &p_display, NULL );
    if( dxresult != DD_OK )
    {
        msg_Err( p_vout, "cannot get primary surface (error %li)", dxresult );
        return VLC_EGENERIC;
    }

    dxresult = IDirectDrawSurface_QueryInterface( p_display,
                                         &IID_IDirectDrawSurface2,
                                         (LPVOID *)&p_vout->p_sys->p_display );
    /* Release the old interface */
    IDirectDrawSurface_Release( p_display );
    if ( dxresult != DD_OK )
    {
        msg_Err( p_vout, "cannot query IDirectDrawSurface2 interface "
                         "(error %li)", dxresult );
        return VLC_EGENERIC;
    }

    /* The clipper will be used only in non-overlay mode */
    DirectXCreateClipper( p_vout );

    /* Make sure the colorkey will be painted */
    p_vout->p_sys->i_colorkey = 1;
    p_vout->p_sys->i_rgb_colorkey =
        DirectXFindColorkey( p_vout, p_vout->p_sys->i_colorkey );

    /* Create the actual brush */
    SetClassLong( p_vout->p_sys->hvideownd, GCL_HBRBACKGROUND,
                  (LONG)CreateSolidBrush( p_vout->p_sys->i_rgb_colorkey ) );
    InvalidateRect( p_vout->p_sys->hvideownd, NULL, TRUE );
    DirectXUpdateRects( p_vout, VLC_TRUE );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * DirectXCreateClipper: Create a clipper that will be used when blitting the
 *                       RGB surface to the main display.
 *****************************************************************************
 * This clipper prevents us to modify by mistake anything on the screen
 * which doesn't belong to our window. For example when a part of our video
 * window is hidden by another window.
 *****************************************************************************/
static int DirectXCreateClipper( vout_thread_t *p_vout )
{
    HRESULT dxresult;

    msg_Dbg( p_vout, "DirectXCreateClipper" );

    /* Create the clipper */
    dxresult = IDirectDraw2_CreateClipper( p_vout->p_sys->p_ddobject, 0,
                                           &p_vout->p_sys->p_clipper, NULL );
    if( dxresult != DD_OK )
    {
        msg_Warn( p_vout, "cannot create clipper (error %li)", dxresult );
        goto error;
    }

    /* Associate the clipper to the window */
    dxresult = IDirectDrawClipper_SetHWnd( p_vout->p_sys->p_clipper, 0,
                                           p_vout->p_sys->hvideownd );
    if( dxresult != DD_OK )
    {
        msg_Warn( p_vout, "cannot attach clipper to window (error %li)",
                          dxresult );
        goto error;
    }

    /* associate the clipper with the surface */
    dxresult = IDirectDrawSurface_SetClipper(p_vout->p_sys->p_display,
                                             p_vout->p_sys->p_clipper);
    if( dxresult != DD_OK )
    {
        msg_Warn( p_vout, "cannot attach clipper to surface (error %li)",
                          dxresult );
        goto error;
    }

    return VLC_SUCCESS;

 error:
    if( p_vout->p_sys->p_clipper )
    {
        IDirectDrawClipper_Release( p_vout->p_sys->p_clipper );
    }
    p_vout->p_sys->p_clipper = NULL;
    return VLC_EGENERIC;
}

/*****************************************************************************
 * DirectXCreateSurface: create an YUV overlay or RGB surface for the video.
 *****************************************************************************
 * The best method of display is with an YUV overlay because the YUV->RGB
 * conversion is done in hardware.
 * You can also create a plain RGB surface.
 * ( Maybe we could also try an RGB overlay surface, which could have hardware
 * scaling and which would also be faster in window mode because you don't
 * need to do any blitting to the main display...)
 *****************************************************************************/
static int DirectXCreateSurface( vout_thread_t *p_vout,
                                 LPDIRECTDRAWSURFACE2 *pp_surface_final,
                                 int i_chroma, int b_overlay,
                                 int i_backbuffers )
{
    HRESULT dxresult;
    LPDIRECTDRAWSURFACE p_surface;
    DDSURFACEDESC ddsd;

    /* Create the video surface */
    if( b_overlay )
    {
        /* Now try to create the YUV overlay surface.
         * This overlay will be displayed on top of the primary surface.
         * A color key is used to determine whether or not the overlay will be
         * displayed, ie the overlay will be displayed in place of the primary
         * surface wherever the primary surface will have this color.
         * The video window has been created with a background of this color so
         * the overlay will be only displayed on top of this window */

        memset( &ddsd, 0, sizeof( DDSURFACEDESC ));
        ddsd.dwSize = sizeof(DDSURFACEDESC);
        ddsd.ddpfPixelFormat.dwSize = sizeof(DDPIXELFORMAT);
        ddsd.ddpfPixelFormat.dwFlags = DDPF_FOURCC;
        ddsd.ddpfPixelFormat.dwFourCC = i_chroma;
        ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT;
        ddsd.dwFlags |= (i_backbuffers ? DDSD_BACKBUFFERCOUNT : 0);
        ddsd.ddsCaps.dwCaps = DDSCAPS_OVERLAY | DDSCAPS_VIDEOMEMORY;
        ddsd.ddsCaps.dwCaps |= (i_backbuffers ? DDSCAPS_COMPLEX | DDSCAPS_FLIP
                                : 0 );
        ddsd.dwHeight = p_vout->render.i_height;
        ddsd.dwWidth = p_vout->render.i_width;
        ddsd.dwBackBufferCount = i_backbuffers;

        dxresult = IDirectDraw2_CreateSurface( p_vout->p_sys->p_ddobject,
                                               &ddsd, &p_surface, NULL );
        if( dxresult != DD_OK )