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-rw-r--r--thirdparty/basis_universal/basisu_backend.h327
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diff --git a/thirdparty/basis_universal/basisu_backend.h b/thirdparty/basis_universal/basisu_backend.h
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--- a/thirdparty/basis_universal/basisu_backend.h
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-// basisu_backend.h
-// Copyright (C) 2019 Binomial LLC. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#pragma once
-
-#include "transcoder/basisu.h"
-#include "basisu_enc.h"
-#include "transcoder/basisu_transcoder_internal.h"
-#include "transcoder/basisu_global_selector_palette.h"
-#include "basisu_frontend.h"
-
-namespace basisu
-{
- struct encoder_block
- {
- encoder_block()
- {
- clear();
- }
-
- uint32_t m_endpoint_predictor;
-
- int m_endpoint_index;
- int m_selector_index;
-
- int m_selector_history_buf_index;
-
- bool m_is_cr_target;
- void clear()
- {
- m_endpoint_predictor = 0;
-
- m_endpoint_index = 0;
- m_selector_index = 0;
-
- m_selector_history_buf_index = 0;
- m_is_cr_target = false;
- }
- };
-
- typedef std::vector<encoder_block> encoder_block_vec;
- typedef vector2D<encoder_block> encoder_block_vec2D;
-
- struct etc1_endpoint_palette_entry
- {
- etc1_endpoint_palette_entry()
- {
- clear();
- }
-
- color_rgba m_color5;
- uint32_t m_inten5;
- bool m_color5_valid;
-
- void clear()
- {
- clear_obj(*this);
- }
- };
-
- typedef std::vector<etc1_endpoint_palette_entry> etc1_endpoint_palette_entry_vec;
-
- struct basisu_backend_params
- {
- bool m_etc1s;
- bool m_debug, m_debug_images;
- float m_endpoint_rdo_quality_thresh;
- float m_selector_rdo_quality_thresh;
- uint32_t m_compression_level;
-
- bool m_use_global_sel_codebook;
- uint32_t m_global_sel_codebook_pal_bits;
- uint32_t m_global_sel_codebook_mod_bits;
- bool m_use_hybrid_sel_codebooks;
-
- basisu_backend_params()
- {
- clear();
- }
-
- void clear()
- {
- m_etc1s = false;
- m_debug = false;
- m_debug_images = false;
- m_endpoint_rdo_quality_thresh = 0.0f;
- m_selector_rdo_quality_thresh = 0.0f;
- m_compression_level = 0;
-
- m_use_global_sel_codebook = false;
- m_global_sel_codebook_pal_bits = ETC1_GLOBAL_SELECTOR_CODEBOOK_MAX_PAL_BITS;
- m_global_sel_codebook_mod_bits = basist::etc1_global_palette_entry_modifier::cTotalBits;
- m_use_hybrid_sel_codebooks = false;
- }
- };
-
- struct basisu_backend_slice_desc
- {
- basisu_backend_slice_desc()
- {
- clear();
- }
- void clear()
- {
- clear_obj(*this);
- }
- uint32_t m_first_block_index;
-
- uint32_t m_orig_width;
- uint32_t m_orig_height;
-
- uint32_t m_width;
- uint32_t m_height;
-
- uint32_t m_num_blocks_x;
- uint32_t m_num_blocks_y;
-
- uint32_t m_num_macroblocks_x;
- uint32_t m_num_macroblocks_y;
-
- uint32_t m_source_file_index; // also the basis image index
- uint32_t m_mip_index;
- bool m_alpha;
- bool m_iframe;
- };
-
- typedef std::vector<basisu_backend_slice_desc> basisu_backend_slice_desc_vec;
-
- struct basisu_backend_output
- {
- bool m_etc1s;
-
- uint32_t m_num_endpoints;
- uint32_t m_num_selectors;
-
- uint8_vec m_endpoint_palette;
- uint8_vec m_selector_palette;
-
- basisu_backend_slice_desc_vec m_slice_desc;
-
- uint8_vec m_slice_image_tables;
- std::vector<uint8_vec> m_slice_image_data;
- uint16_vec m_slice_image_crcs;
-
- basisu_backend_output()
- {
- clear();
- }
-
- void clear()
- {
- m_etc1s = false;
-
- m_num_endpoints = 0;
- m_num_selectors = 0;
-
- m_endpoint_palette.clear();
- m_selector_palette.clear();
- m_slice_desc.clear();
- m_slice_image_tables.clear();
- m_slice_image_data.clear();
- m_slice_image_crcs.clear();
- }
-
- uint32_t get_output_size_estimate() const
- {
- uint32_t total_compressed_bytes = (uint32_t)(m_slice_image_tables.size() + m_endpoint_palette.size() + m_selector_palette.size());
- for (uint32_t i = 0; i < m_slice_image_data.size(); i++)
- total_compressed_bytes += (uint32_t)m_slice_image_data[i].size();
-
- return total_compressed_bytes;
- }
- };
-
- class basisu_backend
- {
- BASISU_NO_EQUALS_OR_COPY_CONSTRUCT(basisu_backend);
-
- public:
-
- basisu_backend();
-
- void clear();
-
- void init(basisu_frontend *pFront_end, basisu_backend_params &params, const basisu_backend_slice_desc_vec &slice_desc, const basist::etc1_global_selector_codebook *pGlobal_sel_codebook);
-
- uint32_t encode();
-
- const basisu_backend_output &get_output() const { return m_output; }
-
- private:
- basisu_frontend *m_pFront_end;
- basisu_backend_params m_params;
- basisu_backend_slice_desc_vec m_slices;
- basisu_backend_output m_output;
- const basist::etc1_global_selector_codebook *m_pGlobal_sel_codebook;
-
- etc1_endpoint_palette_entry_vec m_endpoint_palette;
- basist::etc1_selector_palette_entry_vec m_selector_palette;
-
- struct etc1_global_selector_cb_entry_desc
- {
- uint32_t m_pal_index;
- uint32_t m_mod_index;
- bool m_was_used;
- };
-
- typedef std::vector<etc1_global_selector_cb_entry_desc> etc1_global_selector_cb_entry_desc_vec;
-
- etc1_global_selector_cb_entry_desc_vec m_global_selector_palette_desc;
-
- std::vector<encoder_block_vec2D> m_slice_encoder_blocks;
-
- // Maps OLD to NEW endpoint/selector indices
- uint_vec m_endpoint_remap_table_old_to_new;
- uint_vec m_endpoint_remap_table_new_to_old;
-
- uint_vec m_selector_remap_table_old_to_new;
-
- // Maps NEW to OLD endpoint/selector indices
- uint_vec m_selector_remap_table_new_to_old;
-
- uint32_t get_total_slices() const
- {
- return (uint32_t)m_slices.size();
- }
-
- uint32_t get_total_slice_blocks() const
- {
- return m_pFront_end->get_total_output_blocks();
- }
-
- uint32_t get_block_index(uint32_t slice_index, uint32_t block_x, uint32_t block_y) const
- {
- const basisu_backend_slice_desc &slice = m_slices[slice_index];
-
- assert((block_x < slice.m_num_blocks_x) && (block_y < slice.m_num_blocks_y));
-
- return slice.m_first_block_index + block_y * slice.m_num_blocks_x + block_x;
- }
-
- uint32_t get_total_blocks(uint32_t slice_index) const
- {
- return m_slices[slice_index].m_num_blocks_x * m_slices[slice_index].m_num_blocks_y;
- }
-
- uint32_t get_total_blocks() const
- {
- uint32_t total_blocks = 0;
- for (uint32_t i = 0; i < m_slices.size(); i++)
- total_blocks += get_total_blocks(i);
- return total_blocks;
- }
-
- // Returns the total number of input texels, not counting padding up to blocks/macroblocks.
- uint32_t get_total_input_texels(uint32_t slice_index) const
- {
- return m_slices[slice_index].m_orig_width * m_slices[slice_index].m_orig_height;
- }
-
- uint32_t get_total_input_texels() const
- {
- uint32_t total_texels = 0;
- for (uint32_t i = 0; i < m_slices.size(); i++)
- total_texels += get_total_input_texels(i);
- return total_texels;
- }
-
- int find_slice(uint32_t block_index, uint32_t *pBlock_x, uint32_t *pBlock_y) const
- {
- for (uint32_t i = 0; i < m_slices.size(); i++)
- {
- if ((block_index >= m_slices[i].m_first_block_index) && (block_index < (m_slices[i].m_first_block_index + m_slices[i].m_num_blocks_x * m_slices[i].m_num_blocks_y)))
- {
- const uint32_t ofs = block_index - m_slices[i].m_first_block_index;
- const uint32_t x = ofs % m_slices[i].m_num_blocks_x;
- const uint32_t y = ofs / m_slices[i].m_num_blocks_x;
-
- if (pBlock_x) *pBlock_x = x;
- if (pBlock_y) *pBlock_y = y;
-
- return i;
- }
- }
- return -1;
- }
-
- void create_endpoint_palette();
-
- void create_selector_palette();
-
- // endpoint palette
- // 5:5:5 and predicted 4:4:4 colors, 1 or 2 3-bit intensity table indices
- // selector palette
- // 4x4 2-bit selectors
-
- // per-macroblock:
- // 4 diff bits
- // 4 flip bits
- // Endpoint template index, 1-8 endpoint indices
- // Alternately, if no template applies, we can send 4 ETC1S bits followed by 4-8 endpoint indices
- // 4 selector indices
-
- void reoptimize_and_sort_endpoints_codebook(uint32_t total_block_endpoints_remapped, uint_vec &all_endpoint_indices);
- void sort_selector_codebook();
- void create_encoder_blocks();
- void compute_slice_crcs();
- bool encode_image();
- bool encode_endpoint_palette();
- bool encode_selector_palette();
- int find_video_frame(int slice_index, int delta);
- void check_for_valid_cr_blocks();
- };
-
-} // namespace basisu
-
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