298b3b6c1f
Thanks to Pascal Massimino and Michael Militzer for permission to use under LGPL The xvid idct code is from xvid, and nearly unchanged to make future syncing easy the integration into ffmpeg is done by the commiter the commit message is written by the commiter Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "libavutil/attributes.h"
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#include "avcodec.h"
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#include "idctdsp.h"
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#include "xvididct.h"
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static void idct_xvid_put(uint8_t *dest, int line_size, int16_t *block)
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{
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ff_idct_xvid(block);
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put_pixels_clamped_c(block, dest, line_size);
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}
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static void idct_xvid_add(uint8_t *dest, int line_size, int16_t *block)
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{
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ff_idct_xvid(block);
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add_pixels_clamped_c(block, dest, line_size);
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}
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av_cold void ff_xvididct_init(IDCTDSPContext *c, AVCodecContext *avctx)
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{
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const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
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if (high_bit_depth || avctx->lowres ||
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!(avctx->idct_algo == FF_IDCT_AUTO ||
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avctx->idct_algo == FF_IDCT_XVID))
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return;
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if (avctx->idct_algo == FF_IDCT_XVID) {
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c->idct_put = idct_xvid_put;
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c->idct_add = idct_xvid_add;
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c->idct = ff_idct_xvid;
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c->perm_type = FF_IDCT_PERM_NONE;
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}
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if (ARCH_X86)
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ff_xvididct_init_x86(c);
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ff_init_scantable_permutation(c->idct_permutation, c->perm_type);
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}
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