directx.c

uclinux 下的vlc播放器源代码

                                  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 (%lix%li,%lix%li)",
             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 );

    /* use black brush as the video background color,
       if overlay video is used, this will be replaced by the
       colorkey when the first picture is received */
    SetClassLong( p_vout->p_sys->hvideownd, GCL_HBRBACKGROUND,
                  (LONG)GetStockObject( BLACK_BRUSH ) );
    InvalidateRect( p_vout->p_sys->hvideownd, NULL, TRUE );
    E_(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 )
        {
            *pp_surface_final = NULL;
            return VLC_EGENERIC;
        }
    }

    if( !b_overlay )
    {
        vlc_bool_t b_rgb_surface =
            ( i_chroma == VLC_FOURCC('R','G','B','2') )
          || ( i_chroma == VLC_FOURCC('R','V','1','5') )
           || ( i_chroma == VLC_FOURCC('R','V','1','6') )
            || ( i_chroma == VLC_FOURCC('R','V','2','4') )
             || ( i_chroma == VLC_FOURCC('R','V','3','2') );

        memset( &ddsd, 0, sizeof( DDSURFACEDESC ) );
        ddsd.dwSize = sizeof(DDSURFACEDESC);
        ddsd.ddpfPixelFormat.dwSize = sizeof(DDPIXELFORMAT);
        ddsd.dwFlags = DDSD_HEIGHT | DDSD_WIDTH | DDSD_CAPS;
        ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
        ddsd.dwHeight = p_vout->render.i_height;
        ddsd.dwWidth = p_vout->render.i_width;

        if( p_vout->p_sys->b_use_sysmem )
            ddsd.ddsCaps.dwCaps |= DDSCAPS_SYSTEMMEMORY;
        else
            ddsd.ddsCaps.dwCaps |= DDSCAPS_VIDEOMEMORY;

        if( !b_rgb_surface )
        {
            ddsd.dwFlags |= DDSD_PIXELFORMAT;
            ddsd.ddpfPixelFormat.dwFlags = DDPF_FOURCC;
            ddsd.ddpfPixelFormat.dwFourCC = i_chroma;
        }

        dxresult = IDirectDraw2_CreateSurface( p_vout->p_sys->p_ddobject,
                                               &ddsd, &p_surface, NULL );
        if( dxresult != DD_OK )
        {
            *pp_surface_final = NULL;
            return VLC_EGENERIC;
        }
    }

    /* Now that the surface is created, try to get a newer DirectX interface */
    dxresult = IDirectDrawSurface_QueryInterface( p_surface,
                                     &IID_IDirectDrawSurface2,
                                     (LPVOID *)pp_surface_final );
    IDirectDrawSurface_Release( p_surface );    /* Release the old interface */
    if ( dxresult != DD_OK )
    {
        msg_Err( p_vout, "cannot query IDirectDrawSurface2 interface "
                         "(error %li)", dxresult );
        *pp_surface_final = NULL;
        return VLC_EGENERIC;
    }

    if( b_overlay )
    {
        /* Check the overlay is useable as some graphics cards allow creating
         * several overlays but only one can be used at one time. */
        p_vout->p_sys->p_current_surface = *pp_surface_final;
        if( E_(DirectXUpdateOverlay)( p_vout ) != VLC_SUCCESS )
        {
            IDirectDrawSurface2_Release( *pp_surface_final );
            *pp_surface_final = NULL;
            msg_Err( p_vout, "overlay unuseable (might already be in use)" );
            return VLC_EGENERIC;
        }
    }

    return VLC_SUCCESS;
}

/*****************************************************************************
 * DirectXUpdateOverlay: Move or resize overlay surface on video display.
 *****************************************************************************
 * This function is used to move or resize an overlay surface on the screen.
 * Ususally the overlay is moved by the user and thus, by a move or resize
 * event (in Manage).
 *****************************************************************************/
int E_(DirectXUpdateOverlay)( vout_thread_t *p_vout )
{
    DDOVERLAYFX     ddofx;
    DWORD           dwFlags;
    HRESULT         dxresult;
    RECT            rect_src = p_vout->p_sys->rect_src_clipped;
    RECT            rect_dest = p_vout->p_sys->rect_dest_clipped;

    if( !p_vout->p_sys->b_using_overlay ) return VLC_EGENERIC;

    if( p_vout->p_sys->b_wallpaper )
    {
        int i_x, i_y, i_width, i_height;

        rect_src.left = p_vout->fmt_out.i_x_offset;
        rect_src.top = p_vout->fmt_out.i_y_offset;
        rect_src.right = rect_src.left + p_vout->fmt_out.i_visible_width;
        rect_src.bottom = rect_src.top + p_vout->fmt_out.i_visible_height;

        rect_dest = p_vout->p_sys->rect_display;
        vout_PlacePicture( p_vout, rect_dest.right, rect_dest.bottom,
                           &i_x, &i_y, &i_width, &i_height );

        rect_dest.left += i_x;