libaom.c (1554B)
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 }