media/ffvpx/libavcodec/libaom.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 /**
  20  * @file
  21  * AOM common functions
  22  */
  23
  24 #include "libavutil/pixdesc.h"
  25 #include "libaom.h"
  26
  27 void ff_aom_image_copy_16_to_8(AVFrame *pic, struct aom_image *img)
  28 {
  29     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
  30     int i;
  31
  32     for (i = 0; i < desc->nb_components; i++) {
  33         int w = img->d_w;
  34         int h = img->d_h;
  35         int x, y;
  36
  37         if (i) {
  38             w = (w + img->x_chroma_shift) >> img->x_chroma_shift;
  39             h = (h + img->y_chroma_shift) >> img->y_chroma_shift;
  40         }
  41
  42         for (y = 0; y < h; y++) {
  43             uint16_t *src = (uint16_t *)(img->planes[i] + y * img->stride[i]);
  44             uint8_t *dst = pic->data[i] + y * pic->linesize[i];
  45             for (x = 0; x < w; x++)
  46                 *dst++ = *src++;
  47         }
  48     }
  49 }