361 lines
12 KiB
C++
361 lines
12 KiB
C++
// basisu_frontend.h
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// Copyright (C) 2019-2021 Binomial LLC. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include "basisu_enc.h"
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#include "basisu_etc.h"
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#include "basisu_gpu_texture.h"
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#include "basisu_global_selector_palette_helpers.h"
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#include "../transcoder/basisu_file_headers.h"
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#include "../transcoder/basisu_transcoder.h"
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namespace basisu
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{
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struct vec2U
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{
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uint32_t m_comps[2];
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vec2U() { }
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vec2U(uint32_t a, uint32_t b) { set(a, b); }
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void set(uint32_t a, uint32_t b) { m_comps[0] = a; m_comps[1] = b; }
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uint32_t operator[] (uint32_t i) const { assert(i < 2); return m_comps[i]; }
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uint32_t &operator[] (uint32_t i) { assert(i < 2); return m_comps[i]; }
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};
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const uint32_t BASISU_DEFAULT_COMPRESSION_LEVEL = 2;
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const uint32_t BASISU_MAX_COMPRESSION_LEVEL = 6;
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class basisu_frontend
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{
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BASISU_NO_EQUALS_OR_COPY_CONSTRUCT(basisu_frontend);
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public:
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basisu_frontend() :
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m_total_blocks(0),
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m_total_pixels(0),
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m_endpoint_refinement(false),
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m_use_hierarchical_endpoint_codebooks(false),
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m_use_hierarchical_selector_codebooks(false),
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m_num_endpoint_codebook_iterations(0),
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m_num_selector_codebook_iterations(0)
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{
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}
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enum
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{
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cMaxEndpointClusters = 16128,
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cMaxSelectorClusters = 16128,
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};
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struct params
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{
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params() :
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m_num_source_blocks(0),
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m_pSource_blocks(NULL),
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m_max_endpoint_clusters(256),
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m_max_selector_clusters(256),
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m_compression_level(BASISU_DEFAULT_COMPRESSION_LEVEL),
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m_perceptual(true),
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m_debug_stats(false),
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m_debug_images(false),
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m_dump_endpoint_clusterization(true),
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m_validate(false),
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m_multithreaded(false),
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m_disable_hierarchical_endpoint_codebooks(false),
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m_pGlobal_sel_codebook(NULL),
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m_num_global_sel_codebook_pal_bits(0),
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m_num_global_sel_codebook_mod_bits(0),
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m_use_hybrid_selector_codebooks(false),
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m_hybrid_codebook_quality_thresh(0.0f),
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m_tex_type(basist::cBASISTexType2D),
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m_pGlobal_codebooks(nullptr),
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m_pJob_pool(nullptr)
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{
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}
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uint32_t m_num_source_blocks;
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pixel_block *m_pSource_blocks;
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uint32_t m_max_endpoint_clusters;
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uint32_t m_max_selector_clusters;
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uint32_t m_compression_level;
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bool m_perceptual;
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bool m_debug_stats;
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bool m_debug_images;
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bool m_dump_endpoint_clusterization;
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bool m_validate;
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bool m_multithreaded;
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bool m_disable_hierarchical_endpoint_codebooks;
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const basist::etc1_global_selector_codebook *m_pGlobal_sel_codebook;
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uint32_t m_num_global_sel_codebook_pal_bits;
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uint32_t m_num_global_sel_codebook_mod_bits;
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bool m_use_hybrid_selector_codebooks;
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float m_hybrid_codebook_quality_thresh;
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basist::basis_texture_type m_tex_type;
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const basist::basisu_lowlevel_etc1s_transcoder *m_pGlobal_codebooks;
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job_pool *m_pJob_pool;
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};
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bool init(const params &p);
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bool compress();
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const params &get_params() const { return m_params; }
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const pixel_block &get_source_pixel_block(uint32_t i) const { return m_source_blocks[i]; }
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// RDO output blocks
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uint32_t get_total_output_blocks() const { return static_cast<uint32_t>(m_encoded_blocks.size()); }
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const etc_block &get_output_block(uint32_t block_index) const { return m_encoded_blocks[block_index]; }
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const etc_block_vec &get_output_blocks() const { return m_encoded_blocks; }
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// "Best" ETC1S blocks
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const etc_block &get_etc1s_block(uint32_t block_index) const { return m_etc1_blocks_etc1s[block_index]; }
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// Per-block flags
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bool get_diff_flag(uint32_t block_index) const { return m_encoded_blocks[block_index].get_diff_bit(); }
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// Endpoint clusters
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uint32_t get_total_endpoint_clusters() const { return static_cast<uint32_t>(m_endpoint_clusters.size()); }
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uint32_t get_subblock_endpoint_cluster_index(uint32_t block_index, uint32_t subblock_index) const { return m_block_endpoint_clusters_indices[block_index][subblock_index]; }
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const color_rgba &get_endpoint_cluster_unscaled_color(uint32_t cluster_index, bool individual_mode) const { return m_endpoint_cluster_etc_params[cluster_index].m_color_unscaled[individual_mode]; }
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uint32_t get_endpoint_cluster_inten_table(uint32_t cluster_index, bool individual_mode) const { return m_endpoint_cluster_etc_params[cluster_index].m_inten_table[individual_mode]; }
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bool get_endpoint_cluster_color_is_used(uint32_t cluster_index, bool individual_mode) const { return m_endpoint_cluster_etc_params[cluster_index].m_color_used[individual_mode]; }
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// Selector clusters
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uint32_t get_total_selector_clusters() const { return static_cast<uint32_t>(m_selector_cluster_block_indices.size()); }
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uint32_t get_block_selector_cluster_index(uint32_t block_index) const { return m_block_selector_cluster_index[block_index]; }
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const etc_block &get_selector_cluster_selector_bits(uint32_t cluster_index) const { return m_optimized_cluster_selectors[cluster_index]; }
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const basist::etc1_global_selector_codebook_entry_id_vec &get_selector_cluster_global_selector_entry_ids() const { return m_optimized_cluster_selector_global_cb_ids; }
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const bool_vec &get_selector_cluster_uses_global_cb_vec() const { return m_selector_cluster_uses_global_cb; }
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// Returns block indices using each selector cluster
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const uint_vec &get_selector_cluster_block_indices(uint32_t selector_cluster_index) const { return m_selector_cluster_block_indices[selector_cluster_index]; }
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void dump_debug_image(const char *pFilename, uint32_t first_block, uint32_t num_blocks_x, uint32_t num_blocks_y, bool output_blocks);
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void reoptimize_remapped_endpoints(const uint_vec &new_block_endpoints, int_vec &old_to_new_endpoint_cluster_indices, bool optimize_final_codebook, uint_vec *pBlock_selector_indices = nullptr);
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private:
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params m_params;
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uint32_t m_total_blocks;
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uint32_t m_total_pixels;
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bool m_endpoint_refinement;
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bool m_use_hierarchical_endpoint_codebooks;
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bool m_use_hierarchical_selector_codebooks;
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uint32_t m_num_endpoint_codebook_iterations;
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uint32_t m_num_selector_codebook_iterations;
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// Source pixels for each blocks
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pixel_block_vec m_source_blocks;
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// The quantized ETC1S texture.
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etc_block_vec m_encoded_blocks;
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// Quantized blocks after endpoint quant, but before selector quant
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etc_block_vec m_orig_encoded_blocks;
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// Full quality ETC1S texture
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etc_block_vec m_etc1_blocks_etc1s;
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typedef vec<6, float> vec6F;
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// Endpoint clusterizer
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typedef tree_vector_quant<vec6F> vec6F_quantizer;
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vec6F_quantizer m_endpoint_clusterizer;
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// For each endpoint cluster: An array of which subblock indices (block_index*2+subblock) are located in that cluster.
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// Array of block indices for each endpoint cluster
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basisu::vector<uint_vec> m_endpoint_clusters;
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// Array of block indices for each parent endpoint cluster
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basisu::vector<uint_vec> m_endpoint_parent_clusters;
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// Each block's parent cluster index
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uint8_vec m_block_parent_endpoint_cluster;
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// Array of endpoint cluster indices for each parent endpoint cluster
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basisu::vector<uint_vec> m_endpoint_clusters_within_each_parent_cluster;
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struct endpoint_cluster_etc_params
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{
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endpoint_cluster_etc_params()
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{
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clear();
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}
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void clear()
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{
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clear_obj(m_color_unscaled);
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clear_obj(m_inten_table);
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clear_obj(m_color_error);
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m_subblocks.clear();
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clear_obj(m_color_used);
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m_valid = false;
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}
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// TODO: basisu doesn't use individual mode.
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color_rgba m_color_unscaled[2]; // [use_individual_mode]
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uint32_t m_inten_table[2];
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uint64_t m_color_error[2];
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uint_vec m_subblocks;
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bool m_color_used[2];
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bool m_valid;
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bool operator== (const endpoint_cluster_etc_params &other) const
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{
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for (uint32_t i = 0; i < 2; i++)
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{
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if (m_color_unscaled[i] != other.m_color_unscaled[i])
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return false;
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}
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if (m_inten_table[0] != other.m_inten_table[0])
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return false;
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if (m_inten_table[1] != other.m_inten_table[1])
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return false;
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return true;
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}
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bool operator< (const endpoint_cluster_etc_params &other) const
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{
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for (uint32_t i = 0; i < 2; i++)
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{
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if (m_color_unscaled[i] < other.m_color_unscaled[i])
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return true;
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else if (m_color_unscaled[i] != other.m_color_unscaled[i])
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return false;
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}
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if (m_inten_table[0] < other.m_inten_table[0])
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return true;
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else if (m_inten_table[0] == other.m_inten_table[0])
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{
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if (m_inten_table[1] < other.m_inten_table[1])
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return true;
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}
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return false;
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}
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};
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typedef basisu::vector<endpoint_cluster_etc_params> cluster_subblock_etc_params_vec;
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// Each endpoint cluster's ETC1S parameters
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cluster_subblock_etc_params_vec m_endpoint_cluster_etc_params;
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// The endpoint cluster index used by each ETC1 subblock.
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basisu::vector<vec2U> m_block_endpoint_clusters_indices;
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// The block(s) within each selector cluster
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// Note: If you add anything here that uses selector cluster indicies, be sure to update optimize_selector_codebook()!
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basisu::vector<uint_vec> m_selector_cluster_block_indices;
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// The selector bits for each selector cluster.
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basisu::vector<etc_block> m_optimized_cluster_selectors;
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// The block(s) within each parent selector cluster.
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basisu::vector<uint_vec> m_selector_parent_cluster_block_indices;
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// Each block's parent selector cluster
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uint8_vec m_block_parent_selector_cluster;
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// Array of selector cluster indices for each parent selector cluster
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basisu::vector<uint_vec> m_selector_clusters_within_each_parent_cluster;
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basist::etc1_global_selector_codebook_entry_id_vec m_optimized_cluster_selector_global_cb_ids;
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bool_vec m_selector_cluster_uses_global_cb;
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// Each block's selector cluster index
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basisu::vector<uint32_t> m_block_selector_cluster_index;
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struct subblock_endpoint_quant_err
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{
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uint64_t m_total_err;
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uint32_t m_cluster_index;
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uint32_t m_cluster_subblock_index;
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uint32_t m_block_index;
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uint32_t m_subblock_index;
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bool operator< (const subblock_endpoint_quant_err &rhs) const
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{
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if (m_total_err < rhs.m_total_err)
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return true;
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else if (m_total_err == rhs.m_total_err)
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{
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if (m_block_index < rhs.m_block_index)
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return true;
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else if (m_block_index == rhs.m_block_index)
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return m_subblock_index < rhs.m_subblock_index;
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}
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return false;
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}
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};
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// The sorted subblock endpoint quant error for each endpoint cluster
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basisu::vector<subblock_endpoint_quant_err> m_subblock_endpoint_quant_err_vec;
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std::mutex m_lock;
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//-----------------------------------------------------------------------------
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void init_etc1_images();
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bool init_global_codebooks();
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void init_endpoint_training_vectors();
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void dump_endpoint_clusterization_visualization(const char *pFilename, bool vis_endpoint_colors);
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void generate_endpoint_clusters();
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void compute_endpoint_subblock_error_vec();
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void introduce_new_endpoint_clusters();
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void generate_endpoint_codebook(uint32_t step);
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uint32_t refine_endpoint_clusterization();
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void eliminate_redundant_or_empty_endpoint_clusters();
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void generate_block_endpoint_clusters();
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void compute_endpoint_clusters_within_each_parent_cluster();
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void compute_selector_clusters_within_each_parent_cluster();
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void create_initial_packed_texture();
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void generate_selector_clusters();
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void create_optimized_selector_codebook(uint32_t iter);
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void find_optimal_selector_clusters_for_each_block();
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uint32_t refine_block_endpoints_given_selectors();
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void finalize();
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bool validate_output() const;
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void introduce_special_selector_clusters();
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void optimize_selector_codebook();
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bool check_etc1s_constraints() const;
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};
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} // namespace basisu
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