/* * 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;}