mirror of
https://git.videolan.org/git/ffmpeg.git
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65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
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/*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 <assert.h>
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#include <stdint.h>
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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 "mpegvideoencdsp.h"
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static int try_8x8basis_c(int16_t rem[64], int16_t weight[64],
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int16_t basis[64], int scale)
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{
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int i;
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unsigned int sum = 0;
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for (i = 0; i < 8 * 8; i++) {
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int b = rem[i] + ((basis[i] * scale +
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(1 << (BASIS_SHIFT - RECON_SHIFT - 1))) >>
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(BASIS_SHIFT - RECON_SHIFT));
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int w = weight[i];
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b >>= RECON_SHIFT;
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assert(-512 < b && b < 512);
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sum += (w * b) * (w * b) >> 4;
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}
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return sum >> 2;
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}
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static void add_8x8basis_c(int16_t rem[64], int16_t basis[64], int scale)
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{
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int i;
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for (i = 0; i < 8 * 8; i++)
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rem[i] += (basis[i] * scale +
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(1 << (BASIS_SHIFT - RECON_SHIFT - 1))) >>
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(BASIS_SHIFT - RECON_SHIFT);
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}
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av_cold void ff_mpegvideoencdsp_init(MpegvideoEncDSPContext *c,
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AVCodecContext *avctx)
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{
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c->try_8x8basis = try_8x8basis_c;
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c->add_8x8basis = add_8x8basis_c;
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if (ARCH_X86)
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ff_mpegvideoencdsp_init_x86(c, avctx);
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}
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