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/*
* HEVC/VVC deblocking dsp template
*
* Copyright (C) 2024 Nuo Mi
* Copyright (C) 2012 - 2013 Guillaume Martres
*
* 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
*/
static void FUNC(loop_filter_luma_strong)(pixel *pix, const ptrdiff_t xstride, const ptrdiff_t ystride,
const int32_t tc, const int32_t tc2, const int tc3,
const uint8_t no_p, const uint8_t no_q)
{
for (int d = 0; d < 4; d++) {
const int p3 = P3;
const int p2 = P2;
const int p1 = P1;
const int p0 = P0;
const int q0 = Q0;
const int q1 = Q1;
const int q2 = Q2;
const int q3 = Q3;
if (!no_p) {
P0 = p0 + av_clip(((p2 + 2 * p1 + 2 * p0 + 2 * q0 + q1 + 4) >> 3) - p0, -tc3, tc3);
P1 = p1 + av_clip(((p2 + p1 + p0 + q0 + 2) >> 2) - p1, -tc2, tc2);
P2 = p2 + av_clip(((2 * p3 + 3 * p2 + p1 + p0 + q0 + 4) >> 3) - p2, -tc, tc);
}
if (!no_q) {
Q0 = q0 + av_clip(((p1 + 2 * p0 + 2 * q0 + 2 * q1 + q2 + 4) >> 3) - q0, -tc3, tc3);
Q1 = q1 + av_clip(((p0 + q0 + q1 + q2 + 2) >> 2) - q1, -tc2, tc2);
Q2 = q2 + av_clip(((2 * q3 + 3 * q2 + q1 + q0 + p0 + 4) >> 3) - q2, -tc, tc);
}
pix += ystride;
}
}
static void FUNC(loop_filter_luma_weak)(pixel *pix, const ptrdiff_t xstride, const ptrdiff_t ystride,
const int32_t tc, const int32_t beta, const uint8_t no_p, const uint8_t no_q, const int nd_p, const int nd_q)
{
const int tc_2 = tc >> 1;
for (int d = 0; d < 4; d++) {
const int p2 = P2;
const int p1 = P1;
const int p0 = P0;
const int q0 = Q0;
const int q1 = Q1;
const int q2 = Q2;
int delta0 = (9 * (q0 - p0) - 3 * (q1 - p1) + 8) >> 4;
if (abs(delta0) < 10 * tc) {
delta0 = av_clip(delta0, -tc, tc);
if (!no_p)
P0 = av_clip_pixel(p0 + delta0);
if (!no_q)
Q0 = av_clip_pixel(q0 - delta0);
if (!no_p && nd_p > 1) {
const int deltap1 = av_clip((((p2 + p0 + 1) >> 1) - p1 + delta0) >> 1, -tc_2, tc_2);
P1 = av_clip_pixel(p1 + deltap1);
}
if (!no_q && nd_q > 1) {
const int deltaq1 = av_clip((((q2 + q0 + 1) >> 1) - q1 - delta0) >> 1, -tc_2, tc_2);
Q1 = av_clip_pixel(q1 + deltaq1);
}
}
pix += ystride;
}
}
static void FUNC(loop_filter_chroma_weak)(pixel *pix, const ptrdiff_t xstride, const ptrdiff_t ystride,
const int size, const int32_t tc, const uint8_t no_p, const uint8_t no_q)
{
for (int d = 0; d < size; d++) {
int delta0;
const int p1 = P1;
const int p0 = P0;
const int q0 = Q0;
const int q1 = Q1;
delta0 = av_clip((((q0 - p0) * 4) + p1 - q1 + 4) >> 3, -tc, tc);
if (!no_p)
P0 = av_clip_pixel(p0 + delta0);
if (!no_q)
Q0 = av_clip_pixel(q0 - delta0);
pix += ystride;
}
}
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