/*
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "libavutil/imgutils.h"
 #include "lswsutils.h"
 
 int ff_scale_image(uint8_t *dst_data[4], int dst_linesize[4],

                    int dst_w, int dst_h, enum AVPixelFormat dst_pix_fmt,

                    uint8_t * const src_data[4], int src_linesize[4],

                    int src_w, int src_h, enum AVPixelFormat src_pix_fmt,

                    void *log_ctx)
 {
     int ret;
     struct SwsContext *sws_ctx = sws_getContext(src_w, src_h, src_pix_fmt,
                                                 dst_w, dst_h, dst_pix_fmt,

                                                 0, NULL, NULL, NULL);

     if (!sws_ctx) {
         av_log(log_ctx, AV_LOG_ERROR,
                "Impossible to create scale context for the conversion "
                "fmt:%s s:%dx%d -> fmt:%s s:%dx%d\n",
                av_get_pix_fmt_name(src_pix_fmt), src_w, src_h,
                av_get_pix_fmt_name(dst_pix_fmt), dst_w, dst_h);
         ret = AVERROR(EINVAL);
         goto end;
     }
 
     if ((ret = av_image_alloc(dst_data, dst_linesize, dst_w, dst_h, dst_pix_fmt, 16)) < 0)
         goto end;
     ret = 0;

     sws_scale(sws_ctx, (const uint8_t * const*)src_data, src_linesize, 0, src_h, dst_data, dst_linesize);

 
 end:
     sws_freeContext(sws_ctx);
     return ret;
 }