directx.c

VLC Player Source Code

                                 LPDIRECTDRAWSURFACE2 p_surface )
{
    msg_Dbg( p_vout, "DirectXCloseSurface" );
    if( p_surface != NULL )
    {
        IDirectDrawSurface2_Release( p_surface );
    }
}

/*****************************************************************************
 * NewPictureVec: allocate a vector of identical pictures
 *****************************************************************************
 * Returns 0 on success, -1 otherwise
 *****************************************************************************/
static int NewPictureVec( vout_thread_t *p_vout, picture_t *p_pic,
                          int i_num_pics )
{
    int i;
    int i_ret = VLC_SUCCESS;
    LPDIRECTDRAWSURFACE2 p_surface;

    msg_Dbg( p_vout, "NewPictureVec overlay:%s chroma:%.4s",
             p_vout->p_sys->b_using_overlay ? "yes" : "no",
             (char *)&p_vout->output.i_chroma );

    I_OUTPUTPICTURES = 0;

    /* First we try to use an YUV overlay surface.
     * The overlay surface that we create won't be used to decode directly
     * into it because accessing video memory directly is way to slow (remember
     * that pictures are decoded macroblock per macroblock). Instead the video
     * will be decoded in picture buffers in system memory which will then be
     * memcpy() to the overlay surface. */
    if( p_vout->p_sys->b_using_overlay )
    {
        /* Triple buffering rocks! it doesn't have any processing overhead
         * (you don't have to wait for the vsync) and provides for a very nice
         * video quality (no tearing). */
        if( p_vout->p_sys->b_3buf_overlay )
            i_ret = DirectXCreateSurface( p_vout, &p_surface,
                                          p_vout->output.i_chroma,
                                          p_vout->p_sys->b_using_overlay,
                                          2 /* number of backbuffers */ );

        if( !p_vout->p_sys->b_3buf_overlay || i_ret != VLC_SUCCESS )
        {
            /* Try to reduce the number of backbuffers */
            i_ret = DirectXCreateSurface( p_vout, &p_surface,
                                          p_vout->output.i_chroma,
                                          p_vout->p_sys->b_using_overlay,
                                          0 /* number of backbuffers */ );
        }

        if( i_ret == VLC_SUCCESS )
        {
            DDSCAPS dds_caps;
            picture_t front_pic;
            picture_sys_t front_pic_sys;
            front_pic.p_sys = &front_pic_sys;

            /* Allocate internal structure */
            p_pic[0].p_sys = malloc( sizeof( picture_sys_t ) );
            if( p_pic[0].p_sys == NULL )
            {
                DirectXCloseSurface( p_vout, p_surface );
                return VLC_ENOMEM;
            }

            /* set front buffer */
            p_pic[0].p_sys->p_front_surface = p_surface;

            /* Get the back buffer */
            memset( &dds_caps, 0, sizeof( DDSCAPS ) );
            dds_caps.dwCaps = DDSCAPS_BACKBUFFER;
            if( DD_OK != IDirectDrawSurface2_GetAttachedSurface(
                                                p_surface, &dds_caps,
                                                &p_pic[0].p_sys->p_surface ) )
            {
                msg_Warn( p_vout, "NewPictureVec could not get back buffer" );
                /* front buffer is the same as back buffer */
                p_pic[0].p_sys->p_surface = p_surface;
            }


            p_vout->p_sys->p_current_surface = front_pic.p_sys->p_surface =
                p_pic[0].p_sys->p_front_surface;

            /* Reset the front buffer memory */
            if( DirectXLockSurface( p_vout, &front_pic ) == VLC_SUCCESS )
            {
                int i,j;
                for( i = 0; i < front_pic.i_planes; i++ )
                    for( j = 0; j < front_pic.p[i].i_visible_lines; j++)
                        memset( front_pic.p[i].p_pixels + j *
                                front_pic.p[i].i_pitch, 127,
                                front_pic.p[i].i_visible_pitch );

                DirectXUnlockSurface( p_vout, &front_pic );
            }

            DirectDrawUpdateOverlay( p_vout );
            I_OUTPUTPICTURES = 1;
            msg_Dbg( p_vout, "YUV overlay created successfully" );
        }
    }

    /* As we can't have an overlay, we'll try to create a plain offscreen
     * surface. This surface will reside in video memory because there's a
     * better chance then that we'll be able to use some kind of hardware
     * acceleration like rescaling, blitting or YUV->RGB conversions.
     * We then only need to blit this surface onto the main display when we
     * want to display it */
    if( !p_vout->p_sys->b_using_overlay )
    {
        if( p_vout->p_sys->b_hw_yuv )
        {
            DWORD i_codes;
            DWORD *pi_codes;
            bool b_result = false;

            /* Check if the chroma is supported first. This is required
             * because a few buggy drivers don't mind creating the surface
             * even if they don't know about the chroma. */
            if( IDirectDraw2_GetFourCCCodes( p_vout->p_sys->p_ddobject,
                                             &i_codes, NULL ) == DD_OK )
            {
                pi_codes = malloc( i_codes * sizeof(DWORD) );
                if( pi_codes && IDirectDraw2_GetFourCCCodes(
                    p_vout->p_sys->p_ddobject, &i_codes, pi_codes ) == DD_OK )
                {
                    for( i = 0; i < (int)i_codes; i++ )
                    {
                        if( p_vout->output.i_chroma == pi_codes[i] )
                        {
                            b_result = true;
                            break;
                        }
                    }
                }
            }

            if( b_result )
                i_ret = DirectXCreateSurface( p_vout, &p_surface,
                                              p_vout->output.i_chroma,
                                              0 /* no overlay */,
                                              0 /* no back buffers */ );
            else
                p_vout->p_sys->b_hw_yuv = false;
        }

        if( i_ret || !p_vout->p_sys->b_hw_yuv )
        {
            /* Our last choice is to use a plain RGB surface */
            DDPIXELFORMAT ddpfPixelFormat;

            ddpfPixelFormat.dwSize = sizeof(DDPIXELFORMAT);
            IDirectDrawSurface2_GetPixelFormat( p_vout->p_sys->p_display,
                                                &ddpfPixelFormat );

            if( ddpfPixelFormat.dwFlags & DDPF_RGB )
            {
                switch( ddpfPixelFormat.dwRGBBitCount )
                {
                case 8:
                    p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
                    p_vout->output.pf_setpalette = SetPalette;
                    break;
                case 15:
                    p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5');
                    break;
                case 16:
                    p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
                    break;
                case 24:
                    p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
                    break;
                case 32:
                    p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
                    break;
                default:
                    msg_Err( p_vout, "unknown screen depth" );
                    return VLC_EGENERIC;
                }
                p_vout->output.i_rmask = ddpfPixelFormat.dwRBitMask;
                p_vout->output.i_gmask = ddpfPixelFormat.dwGBitMask;
                p_vout->output.i_bmask = ddpfPixelFormat.dwBBitMask;
            }

            p_vout->p_sys->b_hw_yuv = 0;

            i_ret = DirectXCreateSurface( p_vout, &p_surface,
                                          p_vout->output.i_chroma,
                                          0 /* no overlay */,
                                          0 /* no back buffers */ );

            if( i_ret && !p_vout->p_sys->b_use_sysmem )
            {
                /* Give it a last try with b_use_sysmem enabled */
                p_vout->p_sys->b_use_sysmem = 1;

                i_ret = DirectXCreateSurface( p_vout, &p_surface,
                                              p_vout->output.i_chroma,
                                              0 /* no overlay */,
                                              0 /* no back buffers */ );
            }
        }

        if( i_ret == VLC_SUCCESS )
        {
            /* Allocate internal structure */
            p_pic[0].p_sys = malloc( sizeof( picture_sys_t ) );
            if( p_pic[0].p_sys == NULL )
            {
                DirectXCloseSurface( p_vout, p_surface );
                return VLC_ENOMEM;
            }

            p_pic[0].p_sys->p_surface = p_pic[0].p_sys->p_front_surface
                = p_surface;

            I_OUTPUTPICTURES = 1;

            msg_Dbg( p_vout, "created plain surface of chroma:%.4s",
                     (char *)&p_vout->output.i_chroma );
        }
    }


    /* Now that we've got all our direct-buffers, we can finish filling in the
     * picture_t structures */
    for( i = 0; i < I_OUTPUTPICTURES; i++ )
    {
        p_pic[i].i_status = DESTROYED_PICTURE;
        p_pic[i].i_type   = DIRECT_PICTURE;
        p_pic[i].b_slow   = true;
        p_pic[i].pf_lock  = DirectXLockSurface;
        p_pic[i].pf_unlock = DirectXUnlockSurface;
        PP_OUTPUTPICTURE[i] = &p_pic[i];

        if( DirectXLockSurface( p_vout, &p_pic[i] ) != VLC_SUCCESS )
        {
            /* AAARRGG */
            FreePictureVec( p_vout, p_pic, I_OUTPUTPICTURES );
            I_OUTPUTPICTURES = 0;
            msg_Err( p_vout, "cannot lock surface" );
            return VLC_EGENERIC;
        }
        DirectXUnlockSurface( p_vout, &p_pic[i] );
    }

    msg_Dbg( p_vout, "End NewPictureVec (%s)",
             I_OUTPUTPICTURES ? "succeeded" : "failed" );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * FreePicture: destroy a picture vector allocated with NewPictureVec
 *****************************************************************************
 *
 *****************************************************************************/
static void FreePictureVec( vout_thread_t *p_vout, picture_t *p_pic,
                            int i_num_pics )
{
    int i;

    vlc_mutex_lock( &p_vout->p_sys->lock );
    p_vout->p_sys->p_current_surface = 0;
    vlc_mutex_unlock( &p_vout->p_sys->lock );

    for( i = 0; i < i_num_pics; i++ )
    {
        DirectXCloseSurface( p_vout, p_pic[i].p_sys->p_front_surface );

        for( i = 0; i < i_num_pics; i++ )
        {
            free( p_pic[i].p_sys );
        }
    }
}

/*****************************************************************************
 * UpdatePictureStruct: updates the internal data in the picture_t structure
 *****************************************************************************
 * This will setup stuff for use by the video_output thread
 *****************************************************************************/
static int UpdatePictureStruct( vout_thread_t *p_vout, picture_t *p_pic,
                                int i_chroma )
{
    switch( p_vout->output.i_chroma )
    {
        case VLC_FOURCC('R','G','B','2'):
        case VLC_FOURCC('R','V','1','5'):
        case VLC_FOURCC('R','V','1','6'):
        case VLC_FOURCC('R','V','2','4'):
        case VLC_FOURCC('R','V','3','2'):
            p_pic->p->p_pixels = p_pic->p_sys->ddsd.lpSurface;
            p_pic->p->i_lines = p_vout->output.i_height;
            p_pic->p->i_visible_lines = p_vout->output.i_height;
            p_pic->p->i_pitch = p_pic->p_sys->ddsd.lPitch;
            switch( p_vout->output.i_chroma )
            {
                case VLC_FOURCC('R','G','B','2'):
                    p_pic->p->i_pixel_pitch = 1;
                    break;
                case VLC_FOURCC('R','V','1','5'):
                case VLC_FOURCC('R','V','1','6'):
                    p_pic->p->i_pixel_pitch = 2;
                    break;
                case VLC_FOURCC('R','V','2','4'):
                    p_pic->p->i_pixel_pitch = 3;
                    break;
                case VLC_FOURCC('R','V','3','2'):
                    p_pic->p->i_pixel_pitch = 4;
                    break;
                default:
                    return VLC_EGENERIC;
            }
            p_pic->p->i_visible_pitch = p_vout->output.i_width *
              p_pic->p->i_pixel_pitch;
            p_pic->i_planes = 1;
            break;

        case VLC_FOURCC('Y','V','1','2'):
        case VLC_FOURCC('I','4','2','0'):

            /* U and V inverted compared to I420
             * Fixme: this should be handled by the vout core */
            p_vout->output.i_chroma = VLC_FOURCC('I','4','2','0');

            p_pic->Y_PIXELS = p_pic->p_sys->ddsd.lpSurface;
            p_pic->p[Y_PLANE].i_lines = p_vout->output.i_height;
            p_pic->p[Y_PLANE].i_visible_lines = p_vout->output.i_height;
            p_pic->p[Y_PLANE].i_pitch = p_pic->p_sys->ddsd.lPitch;
            p_pic->p[Y_PLANE].i_pixel_pitch = 1;
            p_pic->p[Y_PLANE].i_visible_pitch = p_vout->output.i_width *
              p_pic->p[Y_PLANE].i_pixel_pitch;

            p_pic->V_PIXELS =  p_pic->Y_PIXELS
              + p_pic->p[Y_PLANE].i_lines * p_pic->p[Y_PLANE].i_pitch;
            p_pic->p[V_PLANE].i_lines = p_vout->output