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/*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; 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 <string.h>
#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/attributes.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "me_cmp.h"
#include "mpegvideoencdsp.h"
static int try_8x8basis_c(const int16_t rem[64], const int16_t weight[64],
const 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;
av_assert2(-512 < b && b < 512);
sum += (w * b) * (w * b) >> 4;
}
return sum >> 2;
}
static void add_8x8basis_c(int16_t rem[64], const 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);
}
static int pix_sum_c(const uint8_t *pix, ptrdiff_t line_size)
{
int s = 0, i, j;
for (i = 0; i < 16; i++) {
for (j = 0; j < 16; j += 8) {
s += pix[0];
s += pix[1];
s += pix[2];
s += pix[3];
s += pix[4];
s += pix[5];
s += pix[6];
s += pix[7];
pix += 8;
}
pix += line_size - 16;
}
return s;
}
static int pix_norm1_c(const uint8_t *pix, ptrdiff_t line_size)
{
int s = 0, i, j;
const uint32_t *sq = ff_square_tab + 256;
for (i = 0; i < 16; i++) {
for (j = 0; j < 16; j += 8) {
#if HAVE_FAST_64BIT
register uint64_t x = *(uint64_t *) pix;
s += sq[x & 0xff];
s += sq[(x >> 8) & 0xff];
s += sq[(x >> 16) & 0xff];
s += sq[(x >> 24) & 0xff];
s += sq[(x >> 32) & 0xff];
s += sq[(x >> 40) & 0xff];
s += sq[(x >> 48) & 0xff];
s += sq[(x >> 56) & 0xff];
#else
register uint32_t x = *(uint32_t *) pix;
s += sq[x & 0xff];
s += sq[(x >> 8) & 0xff];
s += sq[(x >> 16) & 0xff];
s += sq[(x >> 24) & 0xff];
x = *(uint32_t *) (pix + 4);
s += sq[x & 0xff];
s += sq[(x >> 8) & 0xff];
s += sq[(x >> 16) & 0xff];
s += sq[(x >> 24) & 0xff];
#endif
pix += 8;
}
pix += line_size - 16;
}
return s;
}
static av_always_inline void draw_edges_lr(uint8_t *ptr, ptrdiff_t wrap, int width, int height, int w)
{
for (int i = 0; i < height; i++) {
memset(ptr - w, ptr[0], w);
memset(ptr + width, ptr[width - 1], w);
ptr += wrap;
}
}
/* draw the edges of width 'w' of an image of size width, height */
// FIXME: Check that this is OK for MPEG-4 interlaced.
static void draw_edges_8_c(uint8_t *buf, ptrdiff_t wrap, int width, int height,
int w, int h, int sides)
{
uint8_t *last_line;
int i;
/* left and right */
if (w == 16) {
draw_edges_lr(buf, wrap, width, height, 16);
} else if (w == 8) {
draw_edges_lr(buf, wrap, width, height, 8);
} else {
av_assert1(w == 4);
draw_edges_lr(buf, wrap, width, height, 4);
}
/* top and bottom + corners */
buf -= w;
last_line = buf + (height - 1) * wrap;
if (sides & EDGE_TOP)
for (i = 0; i < h; i++)
// top
memcpy(buf - (i + 1) * wrap, buf, width + w + w);
if (sides & EDGE_BOTTOM)
for (i = 0; i < h; i++)
// bottom
memcpy(last_line + (i + 1) * wrap, last_line, width + w + w);
}
/* This wrapper function only serves to convert the stride parameters
* from ptrdiff_t to int for av_image_copy_plane(). */
static void copy_plane_wrapper(uint8_t *dst, ptrdiff_t dst_wrap,
const uint8_t *src, ptrdiff_t src_wrap,
int width, int height)
{
av_image_copy_plane(dst, dst_wrap, src, src_wrap, width, height);
}
/* 2x2 -> 1x1 */
static void shrink22(uint8_t *dst, ptrdiff_t dst_wrap,
const uint8_t *src, ptrdiff_t src_wrap,
int width, int height)
{
int w;
const uint8_t *s1, *s2;
uint8_t *d;
for (; height > 0; height--) {
s1 = src;
s2 = s1 + src_wrap;
d = dst;
for (w = width; w >= 4; w -= 4) {
d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
s1 += 8;
s2 += 8;
d += 4;
}
for (; w > 0; w--) {
d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
s1 += 2;
s2 += 2;
d++;
}
src += 2 * src_wrap;
dst += dst_wrap;
}
}
/* 4x4 -> 1x1 */
static void shrink44(uint8_t *dst, ptrdiff_t dst_wrap,
const uint8_t *src, ptrdiff_t src_wrap,
int width, int height)
{
int w;
const uint8_t *s1, *s2, *s3, *s4;
uint8_t *d;
for (; height > 0; height--) {
s1 = src;
s2 = s1 + src_wrap;
s3 = s2 + src_wrap;
s4 = s3 + src_wrap;
d = dst;
for (w = width; w > 0; w--) {
d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
s2[0] + s2[1] + s2[2] + s2[3] +
s3[0] + s3[1] + s3[2] + s3[3] +
s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
s1 += 4;
s2 += 4;
s3 += 4;
s4 += 4;
d++;
}
src += 4 * src_wrap;
dst += dst_wrap;
}
}
/* 8x8 -> 1x1 */
static void shrink88(uint8_t *dst, ptrdiff_t dst_wrap,
const uint8_t *src, ptrdiff_t src_wrap,
int width, int height)
{
int w, i;
for (; height > 0; height--) {
for(w = width;w > 0; w--) {
int tmp = 0;
for (i = 0; i < 8; i++) {
tmp += src[0] + src[1] + src[2] + src[3] +
src[4] + src[5] + src[6] + src[7];
src += src_wrap;
}
*(dst++) = (tmp + 32) >> 6;
src += 8 - 8 * src_wrap;
}
src += 8 * src_wrap - 8 * width;
dst += dst_wrap - width;
}
}
av_cold void ff_mpegvideoencdsp_init(MpegvideoEncDSPContext *c,
AVCodecContext *avctx)
{
c->try_8x8basis = try_8x8basis_c;
c->add_8x8basis = add_8x8basis_c;
c->shrink[0] = copy_plane_wrapper;
c->shrink[1] = shrink22;
c->shrink[2] = shrink44;
c->shrink[3] = shrink88;
c->pix_sum = pix_sum_c;
c->pix_norm1 = pix_norm1_c;
c->draw_edges = draw_edges_8_c;
#if ARCH_AARCH64
ff_mpegvideoencdsp_init_aarch64(c, avctx);
#elif ARCH_ARM
ff_mpegvideoencdsp_init_arm(c, avctx);
#elif ARCH_PPC
ff_mpegvideoencdsp_init_ppc(c, avctx);
#elif ARCH_RISCV
ff_mpegvideoencdsp_init_riscv(c, avctx);
#elif ARCH_X86
ff_mpegvideoencdsp_init_x86(c, avctx);
#elif ARCH_MIPS
ff_mpegvideoencdsp_init_mips(c, avctx);
#endif
}
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