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/*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <assert.h>
#include <stdint.h>
#include "config.h"
#include "libavutil/attributes.h"
#include "avcodec.h"
#include "mpegvideoencdsp.h"
static int try_8x8basis_c(int16_t rem[64], int16_t weight[64],
int16_t basis[64], int scale)
{
int i;
unsigned int sum = 0;
for (i = 0; i < 8 * 8; i++) {
int b = rem[i] + ((basis[i] * scale +
(1 << (BASIS_SHIFT - RECON_SHIFT - 1))) >>
(BASIS_SHIFT - RECON_SHIFT));
int w = weight[i];
b >>= RECON_SHIFT;
assert(-512 < b && b < 512);
sum += (w * b) * (w * b) >> 4;
}
return sum >> 2;
}
static void add_8x8basis_c(int16_t rem[64], int16_t basis[64], int scale)
{
int i;
for (i = 0; i < 8 * 8; i++)
rem[i] += (basis[i] * scale +
(1 << (BASIS_SHIFT - RECON_SHIFT - 1))) >>
(BASIS_SHIFT - RECON_SHIFT);
}
av_cold void ff_mpegvideoencdsp_init(MpegvideoEncDSPContext *c,
AVCodecContext *avctx)
{
c->try_8x8basis = try_8x8basis_c;
c->add_8x8basis = add_8x8basis_c;
if (ARCH_X86)
ff_mpegvideoencdsp_init_x86(c, avctx);
}
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