yading@10: /*
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "libavutil/imgutils.h"
yading@10: #include "lswsutils.h"
yading@10: 
yading@10: int ff_scale_image(uint8_t *dst_data[4], int dst_linesize[4],
yading@10:                    int dst_w, int dst_h, enum AVPixelFormat dst_pix_fmt,
yading@10:                    uint8_t * const src_data[4], int src_linesize[4],
yading@10:                    int src_w, int src_h, enum AVPixelFormat src_pix_fmt,
yading@10:                    void *log_ctx)
yading@10: {
yading@10:     int ret;
yading@10:     struct SwsContext *sws_ctx = sws_getContext(src_w, src_h, src_pix_fmt,
yading@10:                                                 dst_w, dst_h, dst_pix_fmt,
yading@10:                                                 SWS_BILINEAR, NULL, NULL, NULL);
yading@10:     if (!sws_ctx) {
yading@10:         av_log(log_ctx, AV_LOG_ERROR,
yading@10:                "Impossible to create scale context for the conversion "
yading@10:                "fmt:%s s:%dx%d -> fmt:%s s:%dx%d\n",
yading@10:                av_get_pix_fmt_name(src_pix_fmt), src_w, src_h,
yading@10:                av_get_pix_fmt_name(dst_pix_fmt), dst_w, dst_h);
yading@10:         ret = AVERROR(EINVAL);
yading@10:         goto end;
yading@10:     }
yading@10: 
yading@10:     if ((ret = av_image_alloc(dst_data, dst_linesize, dst_w, dst_h, dst_pix_fmt, 16)) < 0)
yading@10:         goto end;
yading@10:     ret = 0;
yading@10:     sws_scale(sws_ctx, (const uint8_t * const*)src_data, src_linesize, 0, src_h, dst_data, dst_linesize);
yading@10: 
yading@10: end:
yading@10:     sws_freeContext(sws_ctx);
yading@10:     return ret;
yading@10: }