xvididct: Ensure that the scantable permutation is always set correctly
[libav.git] / libavcodec / xvididct.c
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a786c825
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1/*
2 * This file is part of Libav.
3 *
4 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#include "config.h"
20#include "libavutil/attributes.h"
21#include "avcodec.h"
22#include "idctdsp.h"
23#include "xvididct.h"
24
25av_cold void ff_xvididct_init(IDCTDSPContext *c, AVCodecContext *avctx)
26{
27 const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
28
29 if (high_bit_depth ||
30 !(avctx->idct_algo == FF_IDCT_AUTO ||
31 avctx->idct_algo == FF_IDCT_XVIDMMX))
32 return;
33
34 if (ARCH_X86)
35 ff_xvididct_init_x86(c);
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36
37 ff_init_scantable_permutation(c->idct_permutation, c->perm_type);
a786c825 38}