I have variables:
LPDDSURFACEDESCX pddsDesc

if (lpfnavcodec_decode_video2!=NULL)
               { iRes = lpfnavcodec_decode_video2( m_lpCodecCtx, m_lpFrame, &iFrameFinished, &m_lpPacket);
               }

              if (iFrameFinished)
               { if (lpfnav_image_fill_linesizes!= NULL)
                  { lpfnav_image_fill_linesizes(m_lpFrame->linesize, PIX_FMT_YUV420P,dwWidth+32);
                  }
                  memset(&m_lpPict , 0, sizeof(AVPicture));
                  if (lpfnavpicture_fill!=NULL)
                   { lpfnavpicture_fill( &m_lpPict, lpDIBData, PIX_FMT_RGB32, dwWidth, dwHeight);
                   }
                  // Convert the image into RGB and copy to the surface.
                  img_convert( &m_lpPict, PIX_FMT_RGB32, dwWidth, dwHeight, (AVPicture*)m_lpFrame,  PIX_FMT_YUV420P, m_lpCodecCtx->width, m_lpCodecCtx->height, pddsDesc->dwLinearSize);


//////////////////////////////////////////////////////////////////////////////////////////////////////
int img_convert( AVPicture* dst, PixelFormat dst_pix_fmt, int dstWidth, int dstHeight, AVPicture* src, PixelFormat src_pix_fmt, int srcWidth, int srcHeight, DWORD dwStride)
//////////////////////////////////////////////////////////////////////////////////////////////////////
{ int result  = 0;

  // Init linesize on video card stride
  if (dst->linesize[0] == 0)
   dst->linesize[0] = dwStride;

  if (lpfnsws_getContext!=NULL)
   { SwsContext* img_convert_ctx = lpfnsws_getContext( srcWidth, srcHeight, src_pix_fmt, dstWidth, dstHeight, dst_pix_fmt, SWS_BICUBIC, NULL, NULL, NULL);
     if (img_convert_ctx != NULL)
      { if (lpfnsws_scale!=NULL)
         { result = lpfnsws_scale( img_convert_ctx, (const uint8_t* const*)src->data, src->linesize, 0, srcHeight, dst->data, dst->linesize);
           if(result != dstHeight)
            { printf("sws_scale ERROR\r\n");
            }
         }

        if (lpfnsws_freeContext != NULL)
         { lpfnsws_freeContext(img_convert_ctx);
         }
      }
   }
  return result;
}