2 * This file is part of FFmpeg.
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.
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.
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
20 #include "libavutil/attributes.h"
25 static void idct_xvid_put(uint8_t *dest, int line_size, int16_t *block)
28 ff_put_pixels_clamped(block, dest, line_size);
31 static void idct_xvid_add(uint8_t *dest, int line_size, int16_t *block)
34 ff_add_pixels_clamped(block, dest, line_size);
37 av_cold void ff_xvididct_init(IDCTDSPContext *c, AVCodecContext *avctx)
39 const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
41 if (high_bit_depth || avctx->lowres ||
42 !(avctx->idct_algo == FF_IDCT_AUTO ||
43 avctx->idct_algo == FF_IDCT_XVID))
46 if (avctx->idct_algo == FF_IDCT_XVID) {
47 c->idct_put = idct_xvid_put;
48 c->idct_add = idct_xvid_add;
49 c->idct = ff_idct_xvid;
50 c->perm_type = FF_IDCT_PERM_NONE;
54 ff_xvididct_init_x86(c);
56 ff_init_scantable_permutation(c->idct_permutation, c->perm_type);