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https://github.com/FFmpeg/FFmpeg.git
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2f83681c79
The code is based on the remove-logo filter in MPlayer/libmpcodecs, by Robert Edele, relicensed to LGPL with consent of the author. Address trac issue #249.
51 lines
2.0 KiB
C
51 lines
2.0 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/imgutils.h"
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#include "lswsutils.h"
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int ff_scale_image(uint8_t *dst_data[4], int dst_linesize[4],
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int dst_w, int dst_h, enum PixelFormat dst_pix_fmt,
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uint8_t * const src_data[4], int src_linesize[4],
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int src_w, int src_h, enum PixelFormat src_pix_fmt,
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void *log_ctx)
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{
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int ret;
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struct SwsContext *sws_ctx = sws_getContext(src_w, src_h, src_pix_fmt,
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dst_w, dst_h, dst_pix_fmt,
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SWS_BILINEAR, NULL, NULL, NULL);
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if (!sws_ctx) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Impossible to create scale context for the conversion "
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"fmt:%s s:%dx%d -> fmt:%s s:%dx%d\n",
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av_get_pix_fmt_name(src_pix_fmt), src_w, src_h,
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av_get_pix_fmt_name(dst_pix_fmt), dst_w, dst_h);
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ret = AVERROR(EINVAL);
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goto end;
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}
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if ((ret = av_image_alloc(dst_data, dst_linesize, dst_w, dst_h, dst_pix_fmt, 16)) < 0)
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goto end;
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ret = 0;
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sws_scale(sws_ctx, src_data, src_linesize, 0, src_h, dst_data, dst_linesize);
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end:
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sws_freeContext(sws_ctx);
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return ret;
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}
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