ref: 3e0f1508ad17b181b9252423655a15602497bd49
dir: /src/fg_apply_tmpl.c/
/*
* Copyright © 2018, Niklas Haas
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Two Orioles, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <stdint.h>
#include "dav1d/picture.h"
#include "common.h"
#include "common/intops.h"
#include "common/bitdepth.h"
#include "fg_apply.h"
static void generate_scaling(const int bitdepth,
const uint8_t points[][2], const int num,
uint8_t scaling[SCALING_SIZE])
{
#if BITDEPTH == 8
const int shift_x = 0;
#else
const int shift_x = bitdepth - 8;
#endif
const int scaling_size = 1 << bitdepth;
// Fill up the preceding entries with the initial value
for (int i = 0; i < points[0][0] << shift_x; i++)
scaling[i] = points[0][1];
// Linearly interpolate the values in the middle
for (int i = 0; i < num - 1; i++) {
const int bx = points[i][0];
const int by = points[i][1];
const int ex = points[i+1][0];
const int ey = points[i+1][1];
const int dx = ex - bx;
const int dy = ey - by;
const int delta = dy * ((0x10000 + (dx >> 1)) / dx);
for (int x = 0; x < dx; x++) {
const int v = by + ((x * delta + 0x8000) >> 16);
scaling[(bx + x) << shift_x] = v;
}
}
// Fill up the remaining entries with the final value
for (int i = points[num - 1][0] << shift_x; i < scaling_size; i++)
scaling[i] = points[num - 1][1];
#if BITDEPTH != 8
const int pad = 1 << shift_x, rnd = pad >> 1;
for (int i = 0; i < num - 1; i++) {
const int bx = points[i][0] << shift_x;
const int ex = points[i+1][0] << shift_x;
const int dx = ex - bx;
for (int x = 0; x < dx; x += pad) {
const int range = scaling[bx + x + pad] - scaling[bx + x];
for (int n = 1; n < pad; n++) {
scaling[bx + x + n] = scaling[bx + x] + ((range * n + rnd) >> shift_x);
}
}
}
#endif
}
#ifndef UNIT_TEST
void bitfn(dav1d_apply_grain)(const Dav1dFilmGrainDSPContext *const dsp,
Dav1dPicture *const out,
const Dav1dPicture *const in)
{
const Dav1dFilmGrainData *const data = &out->frame_hdr->film_grain.data;
entry grain_lut[3][GRAIN_HEIGHT + 1][GRAIN_WIDTH];
uint8_t scaling[3][SCALING_SIZE];
#if BITDEPTH != 8
const int bitdepth_max = (1 << out->p.bpc) - 1;
#endif
// Generate grain LUTs as needed
dsp->generate_grain_y(grain_lut[0], data HIGHBD_TAIL_SUFFIX); // always needed
if (data->num_uv_points[0] || data->chroma_scaling_from_luma)
dsp->generate_grain_uv[in->p.layout - 1](grain_lut[1], grain_lut[0],
data, 0 HIGHBD_TAIL_SUFFIX);
if (data->num_uv_points[1] || data->chroma_scaling_from_luma)
dsp->generate_grain_uv[in->p.layout - 1](grain_lut[2], grain_lut[0],
data, 1 HIGHBD_TAIL_SUFFIX);
// Generate scaling LUTs as needed
if (data->num_y_points)
generate_scaling(in->p.bpc, data->y_points, data->num_y_points, scaling[0]);
if (data->num_uv_points[0])
generate_scaling(in->p.bpc, data->uv_points[0], data->num_uv_points[0], scaling[1]);
if (data->num_uv_points[1])
generate_scaling(in->p.bpc, data->uv_points[1], data->num_uv_points[1], scaling[2]);
// Copy over the non-modified planes
// TODO: eliminate in favor of per-plane refs
assert(out->stride[0] == in->stride[0]);
if (!data->num_y_points) {
memcpy(out->data[0], in->data[0], out->p.h * out->stride[0]);
}
if (in->p.layout != DAV1D_PIXEL_LAYOUT_I400) {
assert(out->stride[1] == in->stride[1]);
for (int i = 0; i < 2; i++) {
if (!data->num_uv_points[i] && !data->chroma_scaling_from_luma) {
const int suby = in->p.layout == DAV1D_PIXEL_LAYOUT_I420;
memcpy(out->data[1+i], in->data[1+i],
(out->p.h >> suby) * out->stride[1]);
}
}
}
// Synthesize grain for the affected planes
const int rows = (out->p.h + 31) >> 5;
const int ss_y = in->p.layout == DAV1D_PIXEL_LAYOUT_I420;
const int ss_x = in->p.layout != DAV1D_PIXEL_LAYOUT_I444;
const int cpw = (out->p.w + ss_x) >> ss_x;
const int is_id = out->seq_hdr->mtrx == DAV1D_MC_IDENTITY;
for (int row = 0; row < rows; row++) {
const pixel *const luma_src =
((pixel *) in->data[0]) + row * BLOCK_SIZE * PXSTRIDE(in->stride[0]);
if (data->num_y_points) {
const int bh = imin(out->p.h - row * BLOCK_SIZE, BLOCK_SIZE);
dsp->fgy_32x32xn(((pixel *) out->data[0]) + row * BLOCK_SIZE * PXSTRIDE(out->stride[0]),
luma_src, out->stride[0], data,
out->p.w, scaling[0], grain_lut[0], bh, row HIGHBD_TAIL_SUFFIX);
}
const int bh = (imin(out->p.h - row * BLOCK_SIZE, BLOCK_SIZE) + ss_y) >> ss_y;
const ptrdiff_t uv_off = row * BLOCK_SIZE * PXSTRIDE(out->stride[1]) >> ss_y;
if (data->chroma_scaling_from_luma) {
for (int pl = 0; pl < 2; pl++)
dsp->fguv_32x32xn[in->p.layout - 1](((pixel *) out->data[1 + pl]) + uv_off,
((const pixel *) in->data[1 + pl]) + uv_off,
in->stride[1], data, cpw,
scaling[0], grain_lut[1 + pl],
bh, row, luma_src, in->stride[0],
pl, is_id HIGHBD_TAIL_SUFFIX);
} else {
for (int pl = 0; pl < 2; pl++)
if (data->num_uv_points[pl])
dsp->fguv_32x32xn[in->p.layout - 1](((pixel *) out->data[1 + pl]) + uv_off,
((const pixel *) in->data[1 + pl]) + uv_off,
in->stride[1], data, cpw,
scaling[1 + pl], grain_lut[1 + pl],
bh, row, luma_src, in->stride[0],
pl, is_id HIGHBD_TAIL_SUFFIX);
}
}
}
#endif