diff options
Diffstat (limited to 'libavfilter/lswsutils.c')
-rw-r--r-- | libavfilter/lswsutils.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/libavfilter/lswsutils.c b/libavfilter/lswsutils.c new file mode 100644 index 0000000..2c98f3a --- /dev/null +++ b/libavfilter/lswsutils.c @@ -0,0 +1,50 @@ +/* + * 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 PixelFormat dst_pix_fmt, + uint8_t * const src_data[4], int src_linesize[4], + int src_w, int src_h, enum PixelFormat 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, + SWS_BILINEAR, 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; +} |