libaom.c

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/*
 * 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
 */
 
/**
 * @file
 * AOM common functions
 */
 
#include "libavutil/pixdesc.h"
#include "libaom.h"
 
void ff_aom_image_copy_16_to_8(AVFrame *pic, struct aom_image *img)
{
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
    int i;
 
    for (i = 0; i < desc->nb_components; i++) {
        int w = img->d_w;
        int h = img->d_h;
        int x, y;
 
        if (i) {
            w = (w + img->x_chroma_shift) >> img->x_chroma_shift;
            h = (h + img->y_chroma_shift) >> img->y_chroma_shift;
        }
 
        for (y = 0; y < h; y++) {
            uint16_t *src = (uint16_t *)(img->planes[i] + y * img->stride[i]);
            uint8_t *dst = pic->data[i] + y * pic->linesize[i];
            for (x = 0; x < w; x++)
                *dst++ = *src++;
        }
    }
}