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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.
#include "lib/jpegli/encode_streaming.h"
#include <cmath>
#include "lib/jpegli/bit_writer.h"
#include "lib/jpegli/bitstream.h"
#include "lib/jpegli/entropy_coding.h"
#include "lib/jpegli/error.h"
#include "lib/jpegli/memory_manager.h"
#include "lib/jxl/base/bits.h"
#undef HWY_TARGET_INCLUDE
#define HWY_TARGET_INCLUDE "lib/jpegli/encode_streaming.cc"
#include <hwy/foreach_target.h>
#include <hwy/highway.h>
#include "lib/jpegli/dct-inl.h"
#include "lib/jpegli/entropy_coding-inl.h"
HWY_BEFORE_NAMESPACE();
namespace jpegli {
namespace HWY_NAMESPACE {
static const int kStreamingModeCoefficients = 0;
static const int kStreamingModeTokens = 1;
static const int kStreamingModeBits = 2;
namespace {
void ZigZagShuffle(int32_t* JXL_RESTRICT block) {
// TODO(szabadka) SIMDify this.
int32_t tmp[DCTSIZE2];
tmp[0] = block[0];
tmp[1] = block[1];
tmp[2] = block[8];
tmp[3] = block[16];
tmp[4] = block[9];
tmp[5] = block[2];
tmp[6] = block[3];
tmp[7] = block[10];
tmp[8] = block[17];
tmp[9] = block[24];
tmp[10] = block[32];
tmp[11] = block[25];
tmp[12] = block[18];
tmp[13] = block[11];
tmp[14] = block[4];
tmp[15] = block[5];
tmp[16] = block[12];
tmp[17] = block[19];
tmp[18] = block[26];
tmp[19] = block[33];
tmp[20] = block[40];
tmp[21] = block[48];
tmp[22] = block[41];
tmp[23] = block[34];
tmp[24] = block[27];
tmp[25] = block[20];
tmp[26] = block[13];
tmp[27] = block[6];
tmp[28] = block[7];
tmp[29] = block[14];
tmp[30] = block[21];
tmp[31] = block[28];
tmp[32] = block[35];
tmp[33] = block[42];
tmp[34] = block[49];
tmp[35] = block[56];
tmp[36] = block[57];
tmp[37] = block[50];
tmp[38] = block[43];
tmp[39] = block[36];
tmp[40] = block[29];
tmp[41] = block[22];
tmp[42] = block[15];
tmp[43] = block[23];
tmp[44] = block[30];
tmp[45] = block[37];
tmp[46] = block[44];
tmp[47] = block[51];
tmp[48] = block[58];
tmp[49] = block[59];
tmp[50] = block[52];
tmp[51] = block[45];
tmp[52] = block[38];
tmp[53] = block[31];
tmp[54] = block[39];
tmp[55] = block[46];
tmp[56] = block[53];
tmp[57] = block[60];
tmp[58] = block[61];
tmp[59] = block[54];
tmp[60] = block[47];
tmp[61] = block[55];
tmp[62] = block[62];
tmp[63] = block[63];
memcpy(block, tmp, DCTSIZE2 * sizeof(tmp[0]));
}
} // namespace
template <int kMode>
void ProcessiMCURow(j_compress_ptr cinfo) {
jpeg_comp_master* m = cinfo->master;
JpegBitWriter* bw = &m->bw;
int xsize_mcus = DivCeil(cinfo->image_width, 8 * cinfo->max_h_samp_factor);
int ysize_mcus = DivCeil(cinfo->image_height, 8 * cinfo->max_v_samp_factor);
int mcu_y = m->next_iMCU_row;
int32_t* block = m->block_tmp;
int32_t* symbols = m->block_tmp + DCTSIZE2;
int32_t* nonzero_idx = m->block_tmp + 3 * DCTSIZE2;
coeff_t* JXL_RESTRICT last_dc_coeff = m->last_dc_coeff;
bool adaptive_quant = m->use_adaptive_quantization && m->psnr_target == 0;
JBLOCKARRAY ba[kMaxComponents];
if (kMode == kStreamingModeCoefficients) {
for (int c = 0; c < cinfo->num_components; ++c) {
jpeg_component_info* comp = &cinfo->comp_info[c];
int by0 = mcu_y * comp->v_samp_factor;
int block_rows_left = comp->height_in_blocks - by0;
int max_block_rows = std::min(comp->v_samp_factor, block_rows_left);
ba[c] = (*cinfo->mem->access_virt_barray)(
reinterpret_cast<j_common_ptr>(cinfo), m->coeff_buffers[c], by0,
max_block_rows, true);
}
}
if (kMode == kStreamingModeTokens) {
TokenArray* ta = &m->token_arrays[m->cur_token_array];
int max_tokens_per_mcu_row = MaxNumTokensPerMCURow(cinfo);
if (ta->num_tokens + max_tokens_per_mcu_row > m->num_tokens) {
if (ta->tokens) {
m->total_num_tokens += ta->num_tokens;
++m->cur_token_array;
ta = &m->token_arrays[m->cur_token_array];
}
m->num_tokens =
EstimateNumTokens(cinfo, mcu_y, ysize_mcus, m->total_num_tokens,
max_tokens_per_mcu_row);
ta->tokens = Allocate<Token>(cinfo, m->num_tokens, JPOOL_IMAGE);
m->next_token = ta->tokens;
}
}
const float* imcu_start[kMaxComponents];
for (int c = 0; c < cinfo->num_components; ++c) {
jpeg_component_info* comp = &cinfo->comp_info[c];
imcu_start[c] = m->raw_data[c]->Row(mcu_y * comp->v_samp_factor * DCTSIZE);
}
const float* qf = nullptr;
if (adaptive_quant) {
qf = m->quant_field.Row(0);
}
HuffmanCodeTable* dc_code = nullptr;
HuffmanCodeTable* ac_code = nullptr;
const size_t qf_stride = m->quant_field.stride();
for (int mcu_x = 0; mcu_x < xsize_mcus; ++mcu_x) {
for (int c = 0; c < cinfo->num_components; ++c) {
jpeg_component_info* comp = &cinfo->comp_info[c];
if (kMode == kStreamingModeBits) {
dc_code = &m->coding_tables[m->context_map[c]];
ac_code = &m->coding_tables[m->context_map[c + 4]];
}
float* JXL_RESTRICT qmc = m->quant_mul[c];
const size_t stride = m->raw_data[c]->stride();
const int h_factor = m->h_factor[c];
const float* zero_bias_offset = m->zero_bias_offset[c];
const float* zero_bias_mul = m->zero_bias_mul[c];
float aq_strength = 0.0f;
for (int iy = 0; iy < comp->v_samp_factor; ++iy) {
for (int ix = 0; ix < comp->h_samp_factor; ++ix) {
size_t by = mcu_y * comp->v_samp_factor + iy;
size_t bx = mcu_x * comp->h_samp_factor + ix;
if (bx >= comp->width_in_blocks || by >= comp->height_in_blocks) {
if (kMode == kStreamingModeTokens) {
*m->next_token++ = Token(c, 0, 0);
*m->next_token++ = Token(c + 4, 0, 0);
} else if (kMode == kStreamingModeBits) {
WriteBits(bw, dc_code->depth[0], dc_code->code[0]);
WriteBits(bw, ac_code->depth[0], ac_code->code[0]);
}
continue;
}
if (adaptive_quant) {
aq_strength = qf[iy * qf_stride + bx * h_factor];
}
const float* pixels = imcu_start[c] + (iy * stride + bx) * DCTSIZE;
ComputeCoefficientBlock(pixels, stride, qmc, last_dc_coeff[c],
aq_strength, zero_bias_offset, zero_bias_mul,
m->dct_buffer, block);
if (kMode == kStreamingModeCoefficients) {
JCOEF* cblock = &ba[c][iy][bx][0];
for (int k = 0; k < DCTSIZE2; ++k) {
cblock[k] = block[kJPEGNaturalOrder[k]];
}
}
block[0] -= last_dc_coeff[c];
last_dc_coeff[c] += block[0];
if (kMode == kStreamingModeTokens) {
ComputeTokensForBlock<int32_t, false>(block, 0, c, c + 4,
&m->next_token);
} else if (kMode == kStreamingModeBits) {
ZigZagShuffle(block);
const int num_nonzeros = CompactBlock(block, nonzero_idx);
const bool emit_eob = nonzero_idx[num_nonzeros - 1] < 1008;
ComputeSymbols(num_nonzeros, nonzero_idx, block, symbols);
WriteBlock(symbols, block, num_nonzeros, emit_eob, dc_code, ac_code,
bw);
}
}
}
}
}
if (kMode == kStreamingModeTokens) {
TokenArray* ta = &m->token_arrays[m->cur_token_array];
ta->num_tokens = m->next_token - ta->tokens;
ScanTokenInfo* sti = &m->scan_token_info[0];
sti->num_tokens = m->total_num_tokens + ta->num_tokens;
sti->restarts[0] = sti->num_tokens;
}
}
void ComputeCoefficientsForiMCURow(j_compress_ptr cinfo) {
ProcessiMCURow<kStreamingModeCoefficients>(cinfo);
}
void ComputeTokensForiMCURow(j_compress_ptr cinfo) {
ProcessiMCURow<kStreamingModeTokens>(cinfo);
}
void WriteiMCURow(j_compress_ptr cinfo) {
ProcessiMCURow<kStreamingModeBits>(cinfo);
}
// NOLINTNEXTLINE(google-readability-namespace-comments)
} // namespace HWY_NAMESPACE
} // namespace jpegli
HWY_AFTER_NAMESPACE();
#if HWY_ONCE
namespace jpegli {
HWY_EXPORT(ComputeCoefficientsForiMCURow);
HWY_EXPORT(ComputeTokensForiMCURow);
HWY_EXPORT(WriteiMCURow);
void ComputeCoefficientsForiMCURow(j_compress_ptr cinfo) {
HWY_DYNAMIC_DISPATCH(ComputeCoefficientsForiMCURow)(cinfo);
}
void ComputeTokensForiMCURow(j_compress_ptr cinfo) {
HWY_DYNAMIC_DISPATCH(ComputeTokensForiMCURow)(cinfo);
}
void WriteiMCURow(j_compress_ptr cinfo) {
HWY_DYNAMIC_DISPATCH(WriteiMCURow)(cinfo);
}
} // namespace jpegli
#endif // HWY_ONCE
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