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// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#if defined(LIB_JXL_ENC_TRANSFORMS_INL_H_) == defined(HWY_TARGET_TOGGLE)
#ifdef LIB_JXL_ENC_TRANSFORMS_INL_H_
#undef LIB_JXL_ENC_TRANSFORMS_INL_H_
#else
#define LIB_JXL_ENC_TRANSFORMS_INL_H_
#endif
#include <cstddef>
#include <cstdint>
#include <hwy/highway.h>
#include "lib/jxl/ac_strategy.h"
#include "lib/jxl/dct-inl.h"
#include "lib/jxl/dct_scales.h"
HWY_BEFORE_NAMESPACE();
namespace jxl {
enum class AcStrategyType : uint32_t;
namespace HWY_NAMESPACE {
namespace {
// Inverse of ReinterpretingDCT.
template <size_t DCT_ROWS, size_t DCT_COLS, size_t LF_ROWS, size_t LF_COLS,
size_t ROWS, size_t COLS>
HWY_INLINE void ReinterpretingIDCT(const float* input,
const size_t input_stride, float* output,
const size_t output_stride) {
HWY_ALIGN float block[ROWS * COLS] = {};
if (ROWS < COLS) {
for (size_t y = 0; y < LF_ROWS; y++) {
for (size_t x = 0; x < LF_COLS; x++) {
block[y * COLS + x] = input[y * input_stride + x] *
DCTTotalResampleScale<DCT_ROWS, ROWS>(y) *
DCTTotalResampleScale<DCT_COLS, COLS>(x);
}
}
} else {
for (size_t y = 0; y < LF_COLS; y++) {
for (size_t x = 0; x < LF_ROWS; x++) {
block[y * ROWS + x] = input[y * input_stride + x] *
DCTTotalResampleScale<DCT_COLS, COLS>(y) *
DCTTotalResampleScale<DCT_ROWS, ROWS>(x);
}
}
}
// ROWS, COLS <= 8, so we can put scratch space on the stack.
HWY_ALIGN float scratch_space[ROWS * COLS * 3];
ComputeScaledIDCT<ROWS, COLS>()(block, DCTTo(output, output_stride),
scratch_space);
}
template <size_t S>
void DCT2TopBlock(const float* block, size_t stride, float* out) {
static_assert(kBlockDim % S == 0, "S should be a divisor of kBlockDim");
static_assert(S % 2 == 0, "S should be even");
float temp[kDCTBlockSize];
constexpr size_t num_2x2 = S / 2;
for (size_t y = 0; y < num_2x2; y++) {
for (size_t x = 0; x < num_2x2; x++) {
float c00 = block[y * 2 * stride + x * 2];
float c01 = block[y * 2 * stride + x * 2 + 1];
float c10 = block[(y * 2 + 1) * stride + x * 2];
float c11 = block[(y * 2 + 1) * stride + x * 2 + 1];
float r00 = c00 + c01 + c10 + c11;
float r01 = c00 + c01 - c10 - c11;
float r10 = c00 - c01 + c10 - c11;
float r11 = c00 - c01 - c10 + c11;
r00 *= 0.25f;
r01 *= 0.25f;
r10 *= 0.25f;
r11 *= 0.25f;
temp[y * kBlockDim + x] = r00;
temp[y * kBlockDim + num_2x2 + x] = r01;
temp[(y + num_2x2) * kBlockDim + x] = r10;
temp[(y + num_2x2) * kBlockDim + num_2x2 + x] = r11;
}
}
for (size_t y = 0; y < S; y++) {
for (size_t x = 0; x < S; x++) {
out[y * kBlockDim + x] = temp[y * kBlockDim + x];
}
}
}
void AFVDCT4x4(const float* JXL_RESTRICT pixels, float* JXL_RESTRICT coeffs) {
HWY_ALIGN static constexpr float k4x4AFVBasisTranspose[16][16] = {
{
0.2500000000000000,
0.8769029297991420f,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
-0.4105377591765233f,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
},
{
0.2500000000000000,
0.2206518106944235f,
0.0000000000000000,
0.0000000000000000,
-0.7071067811865474f,
0.6235485373547691f,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
},
{
0.2500000000000000,
-0.1014005039375376f,
0.4067007583026075f,
-0.2125574805828875f,
0.0000000000000000,
-0.0643507165794627f,
-0.4517556589999482f,
-0.3046847507248690f,
0.3017929516615495f,
0.4082482904638627f,
0.1747866975480809f,
-0.2110560104933578f,
-0.1426608480880726f,
-0.1381354035075859f,
-0.1743760259965107f,
0.1135498731499434f,
},
{
0.2500000000000000,
-0.1014005039375375f,
0.4444481661973445f,
0.3085497062849767f,
0.0000000000000000f,
-0.0643507165794627f,
0.1585450355184006f,
0.5112616136591823f,
0.2579236279634118f,
0.0000000000000000,
0.0812611176717539f,
0.1856718091610980f,
-0.3416446842253372f,
0.3302282550303788f,
0.0702790691196284f,
-0.0741750459581035f,
},
{
0.2500000000000000,
0.2206518106944236f,
0.0000000000000000,
0.0000000000000000,
0.7071067811865476f,
0.6235485373547694f,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
},
{
0.2500000000000000,
-0.1014005039375378f,
0.0000000000000000,
0.4706702258572536f,
0.0000000000000000,
-0.0643507165794628f,
-0.0403851516082220f,
0.0000000000000000,
0.1627234014286620f,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.7367497537172237f,
0.0875511500058708f,
-0.2921026642334881f,
0.1940289303259434f,
},
{
0.2500000000000000,
-0.1014005039375377f,
0.1957439937204294f,
-0.1621205195722993f,
0.0000000000000000,
-0.0643507165794628f,
0.0074182263792424f,
-0.2904801297289980f,
0.0952002265347504f,
0.0000000000000000,
-0.3675398009862027f,
0.4921585901373873f,
0.2462710772207515f,
-0.0794670660590957f,
0.3623817333531167f,
-0.4351904965232280f,
},
{
0.2500000000000000,
-0.1014005039375376f,
0.2929100136981264f,
0.0000000000000000,
0.0000000000000000,
-0.0643507165794627f,
0.3935103426921017f,
-0.0657870154914280f,
0.0000000000000000,
-0.4082482904638628f,
-0.3078822139579090f,
-0.3852501370925192f,
-0.0857401903551931f,
-0.4613374887461511f,
0.0000000000000000,
0.2191868483885747f,
},
{
0.2500000000000000,
-0.1014005039375376f,
-0.4067007583026072f,
-0.2125574805828705f,
0.0000000000000000,
-0.0643507165794627f,
-0.4517556589999464f,
0.3046847507248840f,
0.3017929516615503f,
-0.4082482904638635f,
-0.1747866975480813f,
0.2110560104933581f,
-0.1426608480880734f,
-0.1381354035075829f,
-0.1743760259965108f,
0.1135498731499426f,
},
{
0.2500000000000000,
-0.1014005039375377f,
-0.1957439937204287f,
-0.1621205195722833f,
0.0000000000000000,
-0.0643507165794628f,
0.0074182263792444f,
0.2904801297290076f,
0.0952002265347505f,
0.0000000000000000,
0.3675398009862011f,
-0.4921585901373891f,
0.2462710772207514f,
-0.0794670660591026f,
0.3623817333531165f,
-0.4351904965232251f,
},
{
0.2500000000000000,
-0.1014005039375375f,
0.0000000000000000,
-0.4706702258572528f,
0.0000000000000000,
-0.0643507165794627f,
0.1107416575309343f,
0.0000000000000000,
-0.1627234014286617f,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
0.1488339922711357f,
0.4972464710953509f,
0.2921026642334879f,
0.5550443808910661f,
},
{
0.2500000000000000,
-0.1014005039375377f,
0.1137907446044809f,
-0.1464291867126764f,
0.0000000000000000,
-0.0643507165794628f,
0.0829816309488205f,
-0.2388977352334460f,
-0.3531238544981630f,
-0.4082482904638630f,
0.4826689115059883f,
0.1741941265991622f,
-0.0476868035022925f,
0.1253805944856366f,
-0.4326608024727445f,
-0.2546827712406646f,
},
{
0.2500000000000000,
-0.1014005039375377f,
-0.4444481661973438f,
0.3085497062849487f,
0.0000000000000000,
-0.0643507165794628f,
0.1585450355183970f,
-0.5112616136592012f,
0.2579236279634129f,
0.0000000000000000,
-0.0812611176717504f,
-0.1856718091610990f,
-0.3416446842253373f,
0.3302282550303805f,
0.0702790691196282f,
-0.0741750459581023f,
},
{
0.2500000000000000,
-0.1014005039375376f,
-0.2929100136981264f,
0.0000000000000000,
0.0000000000000000,
-0.0643507165794627f,
0.3935103426921022f,
0.0657870154914254f,
0.0000000000000000,
0.4082482904638634f,
0.3078822139579031f,
0.3852501370925211f,
-0.0857401903551927f,
-0.4613374887461554f,
0.0000000000000000,
0.2191868483885728f,
},
{
0.2500000000000000,
-0.1014005039375376f,
-0.1137907446044814f,
-0.1464291867126654f,
0.0000000000000000,
-0.0643507165794627f,
0.0829816309488214f,
0.2388977352334547f,
-0.3531238544981624f,
0.4082482904638630f,
-0.4826689115059858f,
-0.1741941265991621f,
-0.0476868035022928f,
0.1253805944856431f,
-0.4326608024727457f,
-0.2546827712406641f,
},
{
0.2500000000000000,
-0.1014005039375374f,
0.0000000000000000,
0.4251149611657548f,
0.0000000000000000,
-0.0643507165794626f,
-0.4517556589999480f,
0.0000000000000000,
-0.6035859033230976f,
0.0000000000000000,
0.0000000000000000,
0.0000000000000000,
-0.1426608480880724f,
-0.1381354035075845f,
0.3487520519930227f,
0.1135498731499429f,
},
};
const HWY_CAPPED(float, 16) d;
for (size_t i = 0; i < 16; i += Lanes(d)) {
auto scalar = Zero(d);
for (size_t j = 0; j < 16; j++) {
auto px = Set(d, pixels[j]);
auto basis = Load(d, k4x4AFVBasisTranspose[j] + i);
scalar = MulAdd(px, basis, scalar);
}
Store(scalar, d, coeffs + i);
}
}
// Coefficient layout:
// - (even, even) positions hold AFV coefficients
// - (odd, even) positions hold DCT4x4 coefficients
// - (any, odd) positions hold DCT4x8 coefficients
template <size_t afv_kind>
void AFVTransformFromPixels(const float* JXL_RESTRICT pixels,
size_t pixels_stride,
float* JXL_RESTRICT coefficients) {
HWY_ALIGN float scratch_space[4 * 8 * 5];
size_t afv_x = afv_kind & 1;
size_t afv_y = afv_kind / 2;
HWY_ALIGN float block[4 * 8] = {};
for (size_t iy = 0; iy < 4; iy++) {
for (size_t ix = 0; ix < 4; ix++) {
block[(afv_y == 1 ? 3 - iy : iy) * 4 + (afv_x == 1 ? 3 - ix : ix)] =
pixels[(iy + 4 * afv_y) * pixels_stride + ix + 4 * afv_x];
}
}
// AFV coefficients in (even, even) positions.
HWY_ALIGN float coeff[4 * 4];
AFVDCT4x4(block, coeff);
for (size_t iy = 0; iy < 4; iy++) {
for (size_t ix = 0; ix < 4; ix++) {
coefficients[iy * 2 * 8 + ix * 2] = coeff[iy * 4 + ix];
}
}
// 4x4 DCT of the block with same y and different x.
ComputeScaledDCT<4, 4>()(
DCTFrom(pixels + afv_y * 4 * pixels_stride + (afv_x == 1 ? 0 : 4),
pixels_stride),
block, scratch_space);
// ... in (odd, even) positions.
for (size_t iy = 0; iy < 4; iy++) {
for (size_t ix = 0; ix < 8; ix++) {
coefficients[iy * 2 * 8 + ix * 2 + 1] = block[iy * 4 + ix];
}
}
// 4x8 DCT of the other half of the block.
ComputeScaledDCT<4, 8>()(
DCTFrom(pixels + (afv_y == 1 ? 0 : 4) * pixels_stride, pixels_stride),
block, scratch_space);
for (size_t iy = 0; iy < 4; iy++) {
for (size_t ix = 0; ix < 8; ix++) {
coefficients[(1 + iy * 2) * 8 + ix] = block[iy * 8 + ix];
}
}
float block00 = coefficients[0] * 0.25f;
float block01 = coefficients[1];
float block10 = coefficients[8];
coefficients[0] = (block00 + block01 + 2 * block10) * 0.25f;
coefficients[1] = (block00 - block01) * 0.5f;
coefficients[8] = (block00 + block01 - 2 * block10) * 0.25f;
}
HWY_MAYBE_UNUSED void TransformFromPixels(const AcStrategyType strategy,
const float* JXL_RESTRICT pixels,
size_t pixels_stride,
float* JXL_RESTRICT coefficients,
float* JXL_RESTRICT scratch_space) {
using Type = AcStrategyType;
switch (strategy) {
case Type::IDENTITY: {
for (size_t y = 0; y < 2; y++) {
for (size_t x = 0; x < 2; x++) {
float block_dc = 0;
for (size_t iy = 0; iy < 4; iy++) {
for (size_t ix = 0; ix < 4; ix++) {
block_dc += pixels[(y * 4 + iy) * pixels_stride + x * 4 + ix];
}
}
block_dc *= 1.0f / 16;
for (size_t iy = 0; iy < 4; iy++) {
for (size_t ix = 0; ix < 4; ix++) {
if (ix == 1 && iy == 1) continue;
coefficients[(y + iy * 2) * 8 + x + ix * 2] =
pixels[(y * 4 + iy) * pixels_stride + x * 4 + ix] -
pixels[(y * 4 + 1) * pixels_stride + x * 4 + 1];
}
}
coefficients[(y + 2) * 8 + x + 2] = coefficients[y * 8 + x];
coefficients[y * 8 + x] = block_dc;
}
}
float block00 = coefficients[0];
float block01 = coefficients[1];
float block10 = coefficients[8];
float block11 = coefficients[9];
coefficients[0] = (block00 + block01 + block10 + block11) * 0.25f;
coefficients[1] = (block00 + block01 - block10 - block11) * 0.25f;
coefficients[8] = (block00 - block01 + block10 - block11) * 0.25f;
coefficients[9] = (block00 - block01 - block10 + block11) * 0.25f;
break;
}
case Type::DCT8X4: {
for (size_t x = 0; x < 2; x++) {
HWY_ALIGN float block[4 * 8];
ComputeScaledDCT<8, 4>()(DCTFrom(pixels + x * 4, pixels_stride), block,
scratch_space);
for (size_t iy = 0; iy < 4; iy++) {
for (size_t ix = 0; ix < 8; ix++) {
// Store transposed.
coefficients[(x + iy * 2) * 8 + ix] = block[iy * 8 + ix];
}
}
}
float block0 = coefficients[0];
float block1 = coefficients[8];
coefficients[0] = (block0 + block1) * 0.5f;
coefficients[8] = (block0 - block1) * 0.5f;
break;
}
case Type::DCT4X8: {
for (size_t y = 0; y < 2; y++) {
HWY_ALIGN float block[4 * 8];
ComputeScaledDCT<4, 8>()(
DCTFrom(pixels + y * 4 * pixels_stride, pixels_stride), block,
scratch_space);
for (size_t iy = 0; iy < 4; iy++) {
for (size_t ix = 0; ix < 8; ix++) {
coefficients[(y + iy * 2) * 8 + ix] = block[iy * 8 + ix];
}
}
}
float block0 = coefficients[0];
float block1 = coefficients[8];
coefficients[0] = (block0 + block1) * 0.5f;
coefficients[8] = (block0 - block1) * 0.5f;
break;
}
case Type::DCT4X4: {
for (size_t y = 0; y < 2; y++) {
for (size_t x = 0; x < 2; x++) {
HWY_ALIGN float block[4 * 4];
ComputeScaledDCT<4, 4>()(
DCTFrom(pixels + y * 4 * pixels_stride + x * 4, pixels_stride),
block, scratch_space);
for (size_t iy = 0; iy < 4; iy++) {
for (size_t ix = 0; ix < 4; ix++) {
coefficients[(y + iy * 2) * 8 + x + ix * 2] = block[iy * 4 + ix];
}
}
}
}
float block00 = coefficients[0];
float block01 = coefficients[1];
float block10 = coefficients[8];
float block11 = coefficients[9];
coefficients[0] = (block00 + block01 + block10 + block11) * 0.25f;
coefficients[1] = (block00 + block01 - block10 - block11) * 0.25f;
coefficients[8] = (block00 - block01 + block10 - block11) * 0.25f;
coefficients[9] = (block00 - block01 - block10 + block11) * 0.25f;
break;
}
case Type::DCT2X2: {
DCT2TopBlock<8>(pixels, pixels_stride, coefficients);
DCT2TopBlock<4>(coefficients, kBlockDim, coefficients);
DCT2TopBlock<2>(coefficients, kBlockDim, coefficients);
break;
}
case Type::DCT16X16: {
ComputeScaledDCT<16, 16>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT16X8: {
ComputeScaledDCT<16, 8>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT8X16: {
ComputeScaledDCT<8, 16>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT32X8: {
ComputeScaledDCT<32, 8>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT8X32: {
ComputeScaledDCT<8, 32>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT32X16: {
ComputeScaledDCT<32, 16>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT16X32: {
ComputeScaledDCT<16, 32>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT32X32: {
ComputeScaledDCT<32, 32>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT: {
ComputeScaledDCT<8, 8>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::AFV0: {
AFVTransformFromPixels<0>(pixels, pixels_stride, coefficients);
break;
}
case Type::AFV1: {
AFVTransformFromPixels<1>(pixels, pixels_stride, coefficients);
break;
}
case Type::AFV2: {
AFVTransformFromPixels<2>(pixels, pixels_stride, coefficients);
break;
}
case Type::AFV3: {
AFVTransformFromPixels<3>(pixels, pixels_stride, coefficients);
break;
}
case Type::DCT64X64: {
ComputeScaledDCT<64, 64>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT64X32: {
ComputeScaledDCT<64, 32>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT32X64: {
ComputeScaledDCT<32, 64>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT128X128: {
ComputeScaledDCT<128, 128>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT128X64: {
ComputeScaledDCT<128, 64>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT64X128: {
ComputeScaledDCT<64, 128>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT256X256: {
ComputeScaledDCT<256, 256>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT256X128: {
ComputeScaledDCT<256, 128>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
case Type::DCT128X256: {
ComputeScaledDCT<128, 256>()(DCTFrom(pixels, pixels_stride), coefficients,
scratch_space);
break;
}
}
}
HWY_MAYBE_UNUSED void DCFromLowestFrequencies(const AcStrategyType strategy,
const float* block, float* dc,
size_t dc_stride) {
using Type = AcStrategyType;
switch (strategy) {
case Type::DCT16X8: {
ReinterpretingIDCT</*DCT_ROWS=*/2 * kBlockDim, /*DCT_COLS=*/kBlockDim,
/*LF_ROWS=*/2, /*LF_COLS=*/1, /*ROWS=*/2, /*COLS=*/1>(
block, 2 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT8X16: {
ReinterpretingIDCT</*DCT_ROWS=*/kBlockDim, /*DCT_COLS=*/2 * kBlockDim,
/*LF_ROWS=*/1, /*LF_COLS=*/2, /*ROWS=*/1, /*COLS=*/2>(
block, 2 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT16X16: {
ReinterpretingIDCT</*DCT_ROWS=*/2 * kBlockDim, /*DCT_COLS=*/2 * kBlockDim,
/*LF_ROWS=*/2, /*LF_COLS=*/2, /*ROWS=*/2, /*COLS=*/2>(
block, 2 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT32X8: {
ReinterpretingIDCT</*DCT_ROWS=*/4 * kBlockDim, /*DCT_COLS=*/kBlockDim,
/*LF_ROWS=*/4, /*LF_COLS=*/1, /*ROWS=*/4, /*COLS=*/1>(
block, 4 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT8X32: {
ReinterpretingIDCT</*DCT_ROWS=*/kBlockDim, /*DCT_COLS=*/4 * kBlockDim,
/*LF_ROWS=*/1, /*LF_COLS=*/4, /*ROWS=*/1, /*COLS=*/4>(
block, 4 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT32X16: {
ReinterpretingIDCT</*DCT_ROWS=*/4 * kBlockDim, /*DCT_COLS=*/2 * kBlockDim,
/*LF_ROWS=*/4, /*LF_COLS=*/2, /*ROWS=*/4, /*COLS=*/2>(
block, 4 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT16X32: {
ReinterpretingIDCT</*DCT_ROWS=*/2 * kBlockDim, /*DCT_COLS=*/4 * kBlockDim,
/*LF_ROWS=*/2, /*LF_COLS=*/4, /*ROWS=*/2, /*COLS=*/4>(
block, 4 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT32X32: {
ReinterpretingIDCT</*DCT_ROWS=*/4 * kBlockDim, /*DCT_COLS=*/4 * kBlockDim,
/*LF_ROWS=*/4, /*LF_COLS=*/4, /*ROWS=*/4, /*COLS=*/4>(
block, 4 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT64X32: {
ReinterpretingIDCT</*DCT_ROWS=*/8 * kBlockDim, /*DCT_COLS=*/4 * kBlockDim,
/*LF_ROWS=*/8, /*LF_COLS=*/4, /*ROWS=*/8, /*COLS=*/4>(
block, 8 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT32X64: {
ReinterpretingIDCT</*DCT_ROWS=*/4 * kBlockDim, /*DCT_COLS=*/8 * kBlockDim,
/*LF_ROWS=*/4, /*LF_COLS=*/8, /*ROWS=*/4, /*COLS=*/8>(
block, 8 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT64X64: {
ReinterpretingIDCT</*DCT_ROWS=*/8 * kBlockDim, /*DCT_COLS=*/8 * kBlockDim,
/*LF_ROWS=*/8, /*LF_COLS=*/8, /*ROWS=*/8, /*COLS=*/8>(
block, 8 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT128X64: {
ReinterpretingIDCT<
/*DCT_ROWS=*/16 * kBlockDim, /*DCT_COLS=*/8 * kBlockDim,
/*LF_ROWS=*/16, /*LF_COLS=*/8, /*ROWS=*/16, /*COLS=*/8>(
block, 16 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT64X128: {
ReinterpretingIDCT<
/*DCT_ROWS=*/8 * kBlockDim, /*DCT_COLS=*/16 * kBlockDim,
/*LF_ROWS=*/8, /*LF_COLS=*/16, /*ROWS=*/8, /*COLS=*/16>(
block, 16 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT128X128: {
ReinterpretingIDCT<
/*DCT_ROWS=*/16 * kBlockDim, /*DCT_COLS=*/16 * kBlockDim,
/*LF_ROWS=*/16, /*LF_COLS=*/16, /*ROWS=*/16, /*COLS=*/16>(
block, 16 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT256X128: {
ReinterpretingIDCT<
/*DCT_ROWS=*/32 * kBlockDim, /*DCT_COLS=*/16 * kBlockDim,
/*LF_ROWS=*/32, /*LF_COLS=*/16, /*ROWS=*/32, /*COLS=*/16>(
block, 32 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT128X256: {
ReinterpretingIDCT<
/*DCT_ROWS=*/16 * kBlockDim, /*DCT_COLS=*/32 * kBlockDim,
/*LF_ROWS=*/16, /*LF_COLS=*/32, /*ROWS=*/16, /*COLS=*/32>(
block, 32 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT256X256: {
ReinterpretingIDCT<
/*DCT_ROWS=*/32 * kBlockDim, /*DCT_COLS=*/32 * kBlockDim,
/*LF_ROWS=*/32, /*LF_COLS=*/32, /*ROWS=*/32, /*COLS=*/32>(
block, 32 * kBlockDim, dc, dc_stride);
break;
}
case Type::DCT:
case Type::DCT2X2:
case Type::DCT4X4:
case Type::DCT4X8:
case Type::DCT8X4:
case Type::AFV0:
case Type::AFV1:
case Type::AFV2:
case Type::AFV3:
case Type::IDENTITY:
dc[0] = block[0];
break;
}
}
} // namespace
// NOLINTNEXTLINE(google-readability-namespace-comments)
} // namespace HWY_NAMESPACE
} // namespace jxl
HWY_AFTER_NAMESPACE();
#endif // LIB_JXL_ENC_TRANSFORMS_INL_H_