mirror of https://git.ffmpeg.org/ffmpeg.git
148 lines
4.1 KiB
C
148 lines
4.1 KiB
C
/*
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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 "libavutil/imgutils.h"
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#include "avcodec.h"
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#include "dsputil.h"
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#include "imgconvert.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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static int pix_sum_c(uint8_t *pix, int line_size)
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{
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int s = 0, i, j;
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for (i = 0; i < 16; i++) {
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for (j = 0; j < 16; j += 8) {
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s += pix[0];
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s += pix[1];
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s += pix[2];
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s += pix[3];
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s += pix[4];
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s += pix[5];
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s += pix[6];
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s += pix[7];
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pix += 8;
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}
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pix += line_size - 16;
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}
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return s;
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}
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static int pix_norm1_c(uint8_t *pix, int line_size)
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{
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int s = 0, i, j;
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uint32_t *sq = ff_square_tab + 256;
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for (i = 0; i < 16; i++) {
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for (j = 0; j < 16; j += 8) {
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#if 0
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s += sq[pix[0]];
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s += sq[pix[1]];
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s += sq[pix[2]];
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s += sq[pix[3]];
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s += sq[pix[4]];
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s += sq[pix[5]];
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s += sq[pix[6]];
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s += sq[pix[7]];
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#else
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#if HAVE_FAST_64BIT
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register uint64_t x = *(uint64_t *) pix;
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s += sq[x & 0xff];
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s += sq[(x >> 8) & 0xff];
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s += sq[(x >> 16) & 0xff];
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s += sq[(x >> 24) & 0xff];
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s += sq[(x >> 32) & 0xff];
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s += sq[(x >> 40) & 0xff];
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s += sq[(x >> 48) & 0xff];
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s += sq[(x >> 56) & 0xff];
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#else
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register uint32_t x = *(uint32_t *) pix;
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s += sq[x & 0xff];
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s += sq[(x >> 8) & 0xff];
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s += sq[(x >> 16) & 0xff];
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s += sq[(x >> 24) & 0xff];
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x = *(uint32_t *) (pix + 4);
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s += sq[x & 0xff];
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s += sq[(x >> 8) & 0xff];
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s += sq[(x >> 16) & 0xff];
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s += sq[(x >> 24) & 0xff];
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#endif
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#endif
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pix += 8;
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}
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pix += line_size - 16;
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}
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return s;
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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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c->shrink[0] = av_image_copy_plane;
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c->shrink[1] = ff_shrink22;
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c->shrink[2] = ff_shrink44;
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c->shrink[3] = ff_shrink88;
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c->pix_sum = pix_sum_c;
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c->pix_norm1 = pix_norm1_c;
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if (ARCH_ARM)
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ff_mpegvideoencdsp_init_arm(c, avctx);
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if (ARCH_PPC)
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ff_mpegvideoencdsp_init_ppc(c, avctx);
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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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