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Diffstat (limited to 'thirdparty/basis_universal/basisu_frontend.cpp')
| -rw-r--r-- | thirdparty/basis_universal/basisu_frontend.cpp | 2432 |
1 files changed, 0 insertions, 2432 deletions
diff --git a/thirdparty/basis_universal/basisu_frontend.cpp b/thirdparty/basis_universal/basisu_frontend.cpp deleted file mode 100644 index 6f7a9bf889..0000000000 --- a/thirdparty/basis_universal/basisu_frontend.cpp +++ /dev/null @@ -1,2432 +0,0 @@ -// basisu_frontend.cpp -// 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. -// -// TODO: -// This code originally supported full ETC1 and ETC1S, so there's some legacy stuff to be cleaned up in here. -// Add endpoint tiling support (where we force adjacent blocks to use the same endpoints during quantization), for a ~10% or more increase in bitrate at same SSIM. The backend already supports this. -// -#include "transcoder/basisu.h" -#include "basisu_frontend.h" -#include <unordered_set> -#include <unordered_map> - -#define BASISU_FRONTEND_VERIFY(c) do { if (!(c)) handle_verify_failure(__LINE__); } while(0) - -namespace basisu -{ - const uint32_t cMaxCodebookCreationThreads = 8; - - const uint32_t BASISU_MAX_ENDPOINT_REFINEMENT_STEPS = 3; - const uint32_t BASISU_MAX_SELECTOR_REFINEMENT_STEPS = 3; - - const uint32_t BASISU_ENDPOINT_PARENT_CODEBOOK_SIZE = 16; - const uint32_t BASISU_SELECTOR_PARENT_CODEBOOK_SIZE = 16; - - // TODO - How to handle internal verifies in the basisu lib - static inline void handle_verify_failure(int line) - { - fprintf(stderr, "ERROR: basisu_frontend: verify check failed at line %i!\n", line); - abort(); - } - - bool basisu_frontend::init(const params &p) - { -#if 0 - // HACK HACK - FILE* pFile; - fopen_s(&pFile, "tv.bin", "rb"); - if (pFile) - { - debug_printf("Using tv.bin\n"); - - fseek(pFile, 0, SEEK_END); - uint32_t size = ftell(pFile); - fseek(pFile, 0, SEEK_SET); - - uint32_t tv = size / sizeof(vec6F_quantizer::training_vec_with_weight); - - std::vector<vec6F_quantizer::training_vec_with_weight> v(tv); - fread(&v[0], 1, sizeof(v[0]) * tv, pFile); - - for (uint32_t i = 0; i < tv; i++) - m_endpoint_clusterizer.add_training_vec(v[i].first, v[i].second); - - m_endpoint_clusterizer.generate(16128); - std::vector<uint_vec> codebook; - m_endpoint_clusterizer.retrieve(codebook); - - printf("Generated %u entries\n", (uint32_t)codebook.size()); - - fclose(pFile); - exit(0); - } -#endif - - if (p.m_use_hybrid_selector_codebooks) - { - if (!p.m_pGlobal_sel_codebook) - { - assert(0); - return false; - } - } - - debug_printf("basisu_frontend::init: Multithreaded: %u, NumEndpointClusters: %u, NumSelectorClusters: %u, Perceptual: %u, CompressionLevel: %u\n", - p.m_multithreaded, p.m_max_endpoint_clusters, p.m_max_selector_clusters, p.m_perceptual, p.m_compression_level); - - debug_printf("Global sel codebook pal bits: %u, Global sel codebook mod bits: %u, Use hybrid selector codebook: %u, Hybrid codebook quality thresh: %f\n", - p.m_num_global_sel_codebook_pal_bits, - p.m_num_global_sel_codebook_mod_bits, - p.m_use_hybrid_selector_codebooks, - p.m_hybrid_codebook_quality_thresh); - - if ((p.m_max_endpoint_clusters < 1) || (p.m_max_endpoint_clusters > cMaxEndpointClusters)) - return false; - if ((p.m_max_selector_clusters < 1) || (p.m_max_selector_clusters > cMaxSelectorClusters)) - return false; - - m_source_blocks.resize(0); - append_vector(m_source_blocks, p.m_pSource_blocks, p.m_num_source_blocks); - - m_params = p; - - m_encoded_blocks.resize(m_params.m_num_source_blocks); - memset(&m_encoded_blocks[0], 0, m_encoded_blocks.size() * sizeof(m_encoded_blocks[0])); - - m_num_endpoint_codebook_iterations = 1; - m_num_selector_codebook_iterations = 1; - - switch (p.m_compression_level) - { - case 0: - { - m_endpoint_refinement = false; - m_use_hierarchical_endpoint_codebooks = true; - m_use_hierarchical_selector_codebooks = true; - break; - } - case 1: - { - m_endpoint_refinement = true; - m_use_hierarchical_endpoint_codebooks = true; - m_use_hierarchical_selector_codebooks = true; - - break; - } - case 2: - { - m_endpoint_refinement = true; - m_use_hierarchical_endpoint_codebooks = false; - m_use_hierarchical_selector_codebooks = false; - break; - } - case 3: - { - m_endpoint_refinement = true; - m_use_hierarchical_endpoint_codebooks = true; - m_use_hierarchical_selector_codebooks = true; - m_num_endpoint_codebook_iterations = BASISU_MAX_ENDPOINT_REFINEMENT_STEPS; - m_num_selector_codebook_iterations = BASISU_MAX_ENDPOINT_REFINEMENT_STEPS; - break; - } - case 4: - { - m_endpoint_refinement = true; - m_use_hierarchical_endpoint_codebooks = false; - m_use_hierarchical_selector_codebooks = false; - m_num_endpoint_codebook_iterations = BASISU_MAX_ENDPOINT_REFINEMENT_STEPS; - m_num_selector_codebook_iterations = BASISU_MAX_ENDPOINT_REFINEMENT_STEPS; - break; - } - case 5: - { - m_endpoint_refinement = true; - m_use_hierarchical_endpoint_codebooks = false; - m_use_hierarchical_selector_codebooks = false; - m_num_endpoint_codebook_iterations = BASISU_MAX_ENDPOINT_REFINEMENT_STEPS*2; - m_num_selector_codebook_iterations = BASISU_MAX_ENDPOINT_REFINEMENT_STEPS*2; - break; - } - - } - - if (m_params.m_disable_hierarchical_endpoint_codebooks) - m_use_hierarchical_endpoint_codebooks = false; - - debug_printf("Endpoint refinement: %u, Hierarchical endpoint codebooks: %u, Hierarchical selector codebooks: %u, Endpoint codebook iters: %u, Selector codebook iters: %u\n", - m_endpoint_refinement, m_use_hierarchical_endpoint_codebooks, m_use_hierarchical_selector_codebooks, m_num_endpoint_codebook_iterations, m_num_selector_codebook_iterations); - - return true; - } - - bool basisu_frontend::compress() - { - debug_printf("basisu_frontend::compress\n"); - - m_total_blocks = m_params.m_num_source_blocks; - m_total_pixels = m_total_blocks * cPixelBlockTotalPixels; - - init_etc1_images(); - - init_endpoint_training_vectors(); - - generate_endpoint_clusters(); - - for (uint32_t refine_endpoint_step = 0; refine_endpoint_step < m_num_endpoint_codebook_iterations; refine_endpoint_step++) - { - BASISU_FRONTEND_VERIFY(check_etc1s_constraints()); - - if (refine_endpoint_step) - { - introduce_new_endpoint_clusters(); - } - - generate_endpoint_codebook(refine_endpoint_step); - - if ((m_params.m_debug_images) && (m_params.m_dump_endpoint_clusterization)) - { - char buf[256]; - snprintf(buf, sizeof(buf), "endpoint_cluster_vis_pre_%u.png", refine_endpoint_step); - dump_endpoint_clusterization_visualization(buf, false); - } - - bool early_out = false; - - if (m_endpoint_refinement) - { - //dump_endpoint_clusterization_visualization("endpoint_clusters_before_refinement.png"); - - if (!refine_endpoint_clusterization()) - early_out = true; - - if ((m_params.m_tex_type == basist::cBASISTexTypeVideoFrames) && (!refine_endpoint_step) && (m_num_endpoint_codebook_iterations == 1)) - { - eliminate_redundant_or_empty_endpoint_clusters(); - generate_endpoint_codebook(refine_endpoint_step); - } - - if ((m_params.m_debug_images) && (m_params.m_dump_endpoint_clusterization)) - { - char buf[256]; - snprintf(buf, sizeof(buf), "endpoint_cluster_vis_post_%u.png", refine_endpoint_step); - - dump_endpoint_clusterization_visualization(buf, false); - snprintf(buf, sizeof(buf), "endpoint_cluster_colors_vis_post_%u.png", refine_endpoint_step); - - dump_endpoint_clusterization_visualization(buf, true); - } - } - - eliminate_redundant_or_empty_endpoint_clusters(); - - if (m_params.m_debug_stats) - debug_printf("Total endpoint clusters: %u\n", (uint32_t)m_endpoint_clusters.size()); - - if (early_out) - break; - } - - BASISU_FRONTEND_VERIFY(check_etc1s_constraints()); - - generate_block_endpoint_clusters(); - - create_initial_packed_texture(); - - generate_selector_clusters(); - - if (m_use_hierarchical_selector_codebooks) - compute_selector_clusters_within_each_parent_cluster(); - - if (m_params.m_compression_level == 0) - { - create_optimized_selector_codebook(0); - - find_optimal_selector_clusters_for_each_block(); - - introduce_special_selector_clusters(); - } - else - { - const uint32_t num_refine_selector_steps = m_params.m_pGlobal_sel_codebook ? 1 : m_num_selector_codebook_iterations; - for (uint32_t refine_selector_steps = 0; refine_selector_steps < num_refine_selector_steps; refine_selector_steps++) - { - create_optimized_selector_codebook(refine_selector_steps); - - find_optimal_selector_clusters_for_each_block(); - - introduce_special_selector_clusters(); - - if ((m_params.m_compression_level >= 3) || (m_params.m_tex_type == basist::cBASISTexTypeVideoFrames)) - { - if (!refine_block_endpoints_given_selectors()) - break; - } - } - } - - optimize_selector_codebook(); - - if (m_params.m_debug_stats) - debug_printf("Total selector clusters: %u\n", (uint32_t)m_selector_cluster_indices.size()); - - finalize(); - - if (m_params.m_validate) - { - if (!validate_output()) - return false; - } - - debug_printf("basisu_frontend::compress: Done\n"); - - return true; - } - - void basisu_frontend::introduce_special_selector_clusters() - { - debug_printf("introduce_special_selector_clusters\n"); - - if (m_params.m_pGlobal_sel_codebook) - return; - - uint32_t total_blocks_relocated = 0; - const uint32_t initial_selector_clusters = (uint32_t)m_selector_cluster_indices.size(); - - bool_vec block_relocated_flags(m_total_blocks); - - // Make sure the selector codebook always has pure flat blocks for each possible selector, to avoid obvious artifacts. - // optimize_selector_codebook() will clean up any redundant clusters we create here. - for (uint32_t sel = 0; sel < 4; sel++) - { - etc_block blk; - clear_obj(blk); - for (uint32_t j = 0; j < 16; j++) - blk.set_selector(j & 3, j >> 2, sel); - - int k; - for (k = 0; k < (int)m_optimized_cluster_selectors.size(); k++) - if (m_optimized_cluster_selectors[k].get_raw_selector_bits() == blk.get_raw_selector_bits()) - break; - if (k < (int)m_optimized_cluster_selectors.size()) - continue; - - debug_printf("Introducing sel %u\n", sel); - - const uint32_t new_selector_cluster_index = (uint32_t)m_optimized_cluster_selectors.size(); - - m_optimized_cluster_selectors.push_back(blk); - - vector_ensure_element_is_valid(m_selector_cluster_indices, new_selector_cluster_index); - - for (uint32_t block_index = 0; block_index < m_total_blocks; block_index++) - { - if (m_orig_encoded_blocks[block_index].get_raw_selector_bits() != blk.get_raw_selector_bits()) - continue; - - // See if using flat selectors actually decreases the block's error. - const uint32_t old_selector_cluster_index = m_block_selector_cluster_index[block_index]; - - etc_block cur_blk; - const uint32_t endpoint_cluster_index = get_subblock_endpoint_cluster_index(block_index, 0); - cur_blk.set_block_color5_etc1s(get_endpoint_cluster_unscaled_color(endpoint_cluster_index, false)); - cur_blk.set_inten_tables_etc1s(get_endpoint_cluster_inten_table(endpoint_cluster_index, false)); - cur_blk.set_raw_selector_bits(get_selector_cluster_selector_bits(old_selector_cluster_index).get_raw_selector_bits()); - cur_blk.set_flip_bit(true); - - const uint64_t cur_err = cur_blk.evaluate_etc1_error(get_source_pixel_block(block_index).get_ptr(), m_params.m_perceptual); - - cur_blk.set_raw_selector_bits(blk.get_raw_selector_bits()); - - const uint64_t new_err = cur_blk.evaluate_etc1_error(get_source_pixel_block(block_index).get_ptr(), m_params.m_perceptual); - - if (new_err >= cur_err) - continue; - - // Change the block to use the new cluster - m_block_selector_cluster_index[block_index] = new_selector_cluster_index; - - m_selector_cluster_indices[new_selector_cluster_index].push_back(block_index); - - block_relocated_flags[block_index] = true; - -#if 0 - int j = vector_find(m_selector_cluster_indices[old_selector_cluster_index], block_index); - if (j >= 0) - m_selector_cluster_indices[old_selector_cluster_index].erase(m_selector_cluster_indices[old_selector_cluster_index].begin() + j); -#endif - - total_blocks_relocated++; - - m_encoded_blocks[block_index].set_raw_selector_bits(blk.get_raw_selector_bits()); - - } // block_index - - } // sel - - if (total_blocks_relocated) - { - debug_printf("Fixing selector codebook\n"); - - for (int selector_cluster_index = 0; selector_cluster_index < (int)initial_selector_clusters; selector_cluster_index++) - { - uint_vec& block_indices = m_selector_cluster_indices[selector_cluster_index]; - - uint32_t dst_ofs = 0; - - for (uint32_t i = 0; i < block_indices.size(); i++) - { - const uint32_t block_index = block_indices[i]; - if (!block_relocated_flags[block_index]) - block_indices[dst_ofs++] = block_index; - } - - block_indices.resize(dst_ofs); - } - } - - debug_printf("Total blocks relocated to new flat selector clusters: %u\n", total_blocks_relocated); - } - - void basisu_frontend::optimize_selector_codebook() - { - debug_printf("optimize_selector_codebook\n"); - - const uint32_t orig_total_selector_clusters = (uint32_t)m_optimized_cluster_selectors.size(); - - bool_vec selector_cluster_was_used(m_optimized_cluster_selectors.size()); - for (uint32_t i = 0; i < m_total_blocks; i++) - selector_cluster_was_used[m_block_selector_cluster_index[i]] = true; - - int_vec old_to_new(m_optimized_cluster_selectors.size()); - int_vec new_to_old; - uint32_t total_new_entries = 0; - - std::unordered_map<uint32_t, uint32_t> selector_hashmap; - - for (int i = 0; i < static_cast<int>(m_optimized_cluster_selectors.size()); i++) - { - if (!selector_cluster_was_used[i]) - { - old_to_new[i] = -1; - continue; - } - - const uint32_t raw_selector_bits = m_optimized_cluster_selectors[i].get_raw_selector_bits(); - - auto find_res = selector_hashmap.insert(std::make_pair(raw_selector_bits, total_new_entries)); - if (!find_res.second) - { - old_to_new[i] = (find_res.first)->second; - continue; - } - - old_to_new[i] = total_new_entries++; - new_to_old.push_back(i); - } - - for (uint32_t i = 0; i < m_block_selector_cluster_index.size(); i++) - { - BASISU_FRONTEND_VERIFY((old_to_new[m_block_selector_cluster_index[i]] >= 0) && (old_to_new[m_block_selector_cluster_index[i]] < (int)total_new_entries)); - m_block_selector_cluster_index[i] = old_to_new[m_block_selector_cluster_index[i]]; - } - - std::vector<etc_block> new_optimized_cluster_selectors(m_optimized_cluster_selectors.size() ? total_new_entries : 0); - basist::etc1_global_selector_codebook_entry_id_vec new_optimized_cluster_selector_global_cb_ids(m_optimized_cluster_selector_global_cb_ids.size() ? total_new_entries : 0); - std::vector<uint_vec> new_selector_cluster_indices(m_selector_cluster_indices.size() ? total_new_entries : 0); - bool_vec new_selector_cluster_uses_global_cb(m_selector_cluster_uses_global_cb.size() ? total_new_entries : 0); - - for (uint32_t i = 0; i < total_new_entries; i++) - { - if (m_optimized_cluster_selectors.size()) - new_optimized_cluster_selectors[i] = m_optimized_cluster_selectors[new_to_old[i]]; - - if (m_optimized_cluster_selector_global_cb_ids.size()) - new_optimized_cluster_selector_global_cb_ids[i] = m_optimized_cluster_selector_global_cb_ids[new_to_old[i]]; - - if (m_selector_cluster_indices.size()) - new_selector_cluster_indices[i] = m_selector_cluster_indices[new_to_old[i]]; - - if (m_selector_cluster_uses_global_cb.size()) - new_selector_cluster_uses_global_cb[i] = m_selector_cluster_uses_global_cb[new_to_old[i]]; - } - - m_optimized_cluster_selectors.swap(new_optimized_cluster_selectors); - m_optimized_cluster_selector_global_cb_ids.swap(new_optimized_cluster_selector_global_cb_ids); - m_selector_cluster_indices.swap(new_selector_cluster_indices); - m_selector_cluster_uses_global_cb.swap(new_selector_cluster_uses_global_cb); - - debug_printf("optimize_selector_codebook: Before: %u After: %u\n", orig_total_selector_clusters, total_new_entries); - } - - void basisu_frontend::init_etc1_images() - { - debug_printf("basisu_frontend::init_etc1_images\n"); - - m_etc1_blocks_etc1s.resize(m_total_blocks); - - const uint32_t N = 4096; - for (uint32_t block_index_iter = 0; block_index_iter < m_total_blocks; block_index_iter += N) - { - const uint32_t first_index = block_index_iter; - const uint32_t last_index = minimum<uint32_t>(m_total_blocks, first_index + N); - - m_params.m_pJob_pool->add_job( [this, first_index, last_index] { - - for (uint32_t block_index = first_index; block_index < last_index; block_index++) - { - const pixel_block &source_blk = get_source_pixel_block(block_index); - - etc1_optimizer optimizer; - etc1_optimizer::params optimizer_params; - etc1_optimizer::results optimizer_results; - - if (m_params.m_compression_level == 0) - optimizer_params.m_quality = cETCQualityFast; - else if (m_params.m_compression_level == BASISU_MAX_COMPRESSION_LEVEL) - optimizer_params.m_quality = cETCQualityUber; - - optimizer_params.m_num_src_pixels = 16; - optimizer_params.m_pSrc_pixels = source_blk.get_ptr(); - optimizer_params.m_perceptual = m_params.m_perceptual; - - uint8_t selectors[16]; - optimizer_results.m_pSelectors = selectors; - optimizer_results.m_n = 16; - - optimizer.init(optimizer_params, optimizer_results); - optimizer.compute(); - - etc_block &blk = m_etc1_blocks_etc1s[block_index]; - - memset(&blk, 0, sizeof(blk)); - blk.set_block_color5_etc1s(optimizer_results.m_block_color_unscaled); - blk.set_inten_tables_etc1s(optimizer_results.m_block_inten_table); - blk.set_flip_bit(true); - - for (uint32_t y = 0; y < 4; y++) - for (uint32_t x = 0; x < 4; x++) - blk.set_selector(x, y, selectors[x + y * 4]); - } - - } ); - } - - m_params.m_pJob_pool->wait_for_all(); - } - - void basisu_frontend::init_endpoint_training_vectors() - { - debug_printf("init_endpoint_training_vectors\n"); - - vec6F_quantizer::array_of_weighted_training_vecs &training_vecs = m_endpoint_clusterizer.get_training_vecs(); - - training_vecs.resize(m_total_blocks * 2); - - const uint32_t N = 16384; - for (uint32_t block_index_iter = 0; block_index_iter < m_total_blocks; block_index_iter += N) - { - const uint32_t first_index = block_index_iter; - const uint32_t last_index = minimum<uint32_t>(m_total_blocks, first_index + N); - - m_params.m_pJob_pool->add_job( [this, first_index, last_index, &training_vecs] { - - for (uint32_t block_index = first_index; block_index < last_index; block_index++) - { - const etc_block &blk = m_etc1_blocks_etc1s[block_index]; - - color_rgba block_colors[2]; - blk.get_block_low_high_colors(block_colors, 0); - - vec6F v; - v[0] = block_colors[0].r * (1.0f / 255.0f); - v[1] = block_colors[0].g * (1.0f / 255.0f); - v[2] = block_colors[0].b * (1.0f / 255.0f); - v[3] = block_colors[1].r * (1.0f / 255.0f); - v[4] = block_colors[1].g * (1.0f / 255.0f); - v[5] = block_colors[1].b * (1.0f / 255.0f); - - training_vecs[block_index * 2 + 0] = std::make_pair(v, 1); - training_vecs[block_index * 2 + 1] = std::make_pair(v, 1); - - } // block_index; - - } ); - - } // block_index_iter - - m_params.m_pJob_pool->wait_for_all(); - } - - void basisu_frontend::generate_endpoint_clusters() - { - debug_printf("Begin endpoint quantization\n"); - - const uint32_t parent_codebook_size = (m_params.m_max_endpoint_clusters >= 256) ? BASISU_ENDPOINT_PARENT_CODEBOOK_SIZE : 0; - uint32_t max_threads = 0; - max_threads = m_params.m_multithreaded ? minimum<int>(std::thread::hardware_concurrency(), cMaxCodebookCreationThreads) : 0; - - debug_printf("Using %u threads to create codebook\n", max_threads); - bool status = generate_hierarchical_codebook_threaded(m_endpoint_clusterizer, - m_params.m_max_endpoint_clusters, m_use_hierarchical_endpoint_codebooks ? parent_codebook_size : 0, - m_endpoint_clusters, - m_endpoint_parent_clusters, - max_threads, m_params.m_pJob_pool); - BASISU_FRONTEND_VERIFY(status); - - if (m_use_hierarchical_endpoint_codebooks) - { - if (!m_endpoint_parent_clusters.size()) - { - m_endpoint_parent_clusters.resize(0); - m_endpoint_parent_clusters.resize(1); - for (uint32_t i = 0; i < m_total_blocks; i++) - { - m_endpoint_parent_clusters[0].push_back(i*2); - m_endpoint_parent_clusters[0].push_back(i*2+1); - } - } - - BASISU_ASSUME(BASISU_ENDPOINT_PARENT_CODEBOOK_SIZE <= UINT8_MAX); - - m_block_parent_endpoint_cluster.resize(0); - m_block_parent_endpoint_cluster.resize(m_total_blocks); - vector_set_all(m_block_parent_endpoint_cluster, 0xFF); - for (uint32_t parent_cluster_index = 0; parent_cluster_index < m_endpoint_parent_clusters.size(); parent_cluster_index++) - { - const uint_vec &cluster = m_endpoint_parent_clusters[parent_cluster_index]; - for (uint32_t j = 0; j < cluster.size(); j++) - { - const uint32_t block_index = cluster[j] >> 1; - m_block_parent_endpoint_cluster[block_index] = static_cast<uint8_t>(parent_cluster_index); - } - } - - for (uint32_t i = 0; i < m_total_blocks; i++) - { - BASISU_FRONTEND_VERIFY(m_block_parent_endpoint_cluster[i] != 0xFF); - } - - // Ensure that all the blocks within each cluster are all in the same parent cluster, or something is very wrong. - for (uint32_t cluster_index = 0; cluster_index < m_endpoint_clusters.size(); cluster_index++) - { - const uint_vec &cluster = m_endpoint_clusters[cluster_index]; - - uint32_t parent_cluster_index = 0; - for (uint32_t j = 0; j < cluster.size(); j++) - { - const uint32_t block_index = cluster[j] >> 1; - if (!j) - { - parent_cluster_index = m_block_parent_endpoint_cluster[block_index]; - } - else - { - BASISU_FRONTEND_VERIFY(m_block_parent_endpoint_cluster[block_index] == parent_cluster_index); - } - } - } - } - - if (m_params.m_debug_stats) - debug_printf("Total endpoint clusters: %u, parent clusters: %u\n", (uint32_t)m_endpoint_clusters.size(), (uint32_t)m_endpoint_parent_clusters.size()); - } - - void basisu_frontend::generate_block_endpoint_clusters() - { - m_block_endpoint_clusters_indices.resize(m_total_blocks); - - for (int cluster_index = 0; cluster_index < static_cast<int>(m_endpoint_clusters.size()); cluster_index++) - { - const std::vector<uint32_t>& cluster_indices = m_endpoint_clusters[cluster_index]; - - for (uint32_t cluster_indices_iter = 0; cluster_indices_iter < cluster_indices.size(); cluster_indices_iter++) - { - const uint32_t block_index = cluster_indices[cluster_indices_iter] >> 1; - const uint32_t subblock_index = cluster_indices[cluster_indices_iter] & 1; - - m_block_endpoint_clusters_indices[block_index][subblock_index] = cluster_index; - - } // cluster_indices_iter - } - - for (uint32_t block_index = 0; block_index < m_total_blocks; block_index++) - { - uint32_t cluster_0 = m_block_endpoint_clusters_indices[block_index][0]; - uint32_t cluster_1 = m_block_endpoint_clusters_indices[block_index][1]; - BASISU_FRONTEND_VERIFY(cluster_0 == cluster_1); - } - } - - void basisu_frontend::compute_endpoint_clusters_within_each_parent_cluster() - { - generate_block_endpoint_clusters(); - - m_endpoint_clusters_within_each_parent_cluster.resize(0); - m_endpoint_clusters_within_each_parent_cluster.resize(m_endpoint_parent_clusters.size()); - - for (uint32_t block_index = 0; block_index < m_total_blocks; block_index++) - { - const uint32_t cluster_index = m_block_endpoint_clusters_indices[block_index][0]; - const uint32_t parent_cluster_index = m_block_parent_endpoint_cluster[block_index]; - - m_endpoint_clusters_within_each_parent_cluster[parent_cluster_index].push_back(cluster_index); - } - - for (uint32_t i = 0; i < m_endpoint_clusters_within_each_parent_cluster.size(); i++) - { - uint_vec &cluster_indices = m_endpoint_clusters_within_each_parent_cluster[i]; - - BASISU_FRONTEND_VERIFY(cluster_indices.size()); - - vector_sort(cluster_indices); - - auto last = std::unique(cluster_indices.begin(), cluster_indices.end()); - cluster_indices.erase(last, cluster_indices.end()); - } - } - - void basisu_frontend::compute_endpoint_subblock_error_vec() - { - m_subblock_endpoint_quant_err_vec.resize(0); - - const uint32_t N = 512; - for (uint32_t cluster_index_iter = 0; cluster_index_iter < m_endpoint_clusters.size(); cluster_index_iter += N) - { - const uint32_t first_index = cluster_index_iter; - const uint32_t last_index = minimum<uint32_t>((uint32_t)m_endpoint_clusters.size(), cluster_index_iter + N); - - m_params.m_pJob_pool->add_job( [this, first_index, last_index] { - - for (uint32_t cluster_index = first_index; cluster_index < last_index; cluster_index++) - { - const std::vector<uint32_t>& cluster_indices = m_endpoint_clusters[cluster_index]; - - assert(cluster_indices.size()); - - for (uint32_t cluster_indices_iter = 0; cluster_indices_iter < cluster_indices.size(); cluster_indices_iter++) - { - std::vector<color_rgba> cluster_pixels(8); - - const uint32_t block_index = cluster_indices[cluster_indices_iter] >> 1; - const uint32_t subblock_index = cluster_indices[cluster_indices_iter] & 1; - - const bool flipped = true; - - const color_rgba *pSource_block_pixels = get_source_pixel_block(block_index).get_ptr(); - - for (uint32_t pixel_index = 0; pixel_index < 8; pixel_index++) - { - cluster_pixels[pixel_index] = pSource_block_pixels[g_etc1_pixel_indices[flipped][subblock_index][pixel_index]]; - } - - const endpoint_cluster_etc_params &etc_params = m_endpoint_cluster_etc_params[cluster_index]; - - assert(etc_params.m_valid); - - color_rgba block_colors[4]; - etc_block::get_block_colors5(block_colors, etc_params.m_color_unscaled[0], etc_params.m_inten_table[0], true); - - uint64_t total_err = 0; - - for (uint32_t i = 0; i < 8; i++) - { - const color_rgba &c = cluster_pixels[i]; - - uint64_t best_err = UINT64_MAX; - //uint32_t best_index = 0; - - for (uint32_t s = 0; s < 4; s++) - { - uint64_t err = color_distance(m_params.m_perceptual, c, block_colors[s], false); - if (err < best_err) - { - best_err = err; - //best_index = s; - } - } - - total_err += best_err; - } - - subblock_endpoint_quant_err quant_err; - quant_err.m_total_err = total_err; - quant_err.m_cluster_index = cluster_index; - quant_err.m_cluster_subblock_index = cluster_indices_iter; - quant_err.m_block_index = block_index; - quant_err.m_subblock_index = subblock_index; - - { - std::lock_guard<std::mutex> lock(m_lock); - - m_subblock_endpoint_quant_err_vec.push_back(quant_err); - } - } - } // cluster_index - - } ); - } // cluster_index_iter - - m_params.m_pJob_pool->wait_for_all(); - - vector_sort(m_subblock_endpoint_quant_err_vec); - } - - void basisu_frontend::introduce_new_endpoint_clusters() - { - debug_printf("introduce_new_endpoint_clusters\n"); - - generate_block_endpoint_clusters(); - - int num_new_endpoint_clusters = m_params.m_max_endpoint_clusters - (uint32_t)m_endpoint_clusters.size(); - if (num_new_endpoint_clusters <= 0) - return; - - compute_endpoint_subblock_error_vec(); - - const uint32_t num_orig_endpoint_clusters = (uint32_t)m_endpoint_clusters.size(); - - std::unordered_set<uint32_t> training_vector_was_relocated; - - uint_vec cluster_sizes(num_orig_endpoint_clusters); - for (uint32_t i = 0; i < num_orig_endpoint_clusters; i++) - cluster_sizes[i] = (uint32_t)m_endpoint_clusters[i].size(); - - std::unordered_set<uint32_t> ignore_cluster; - - while (num_new_endpoint_clusters) - { - if (m_subblock_endpoint_quant_err_vec.size() == 0) - break; - - subblock_endpoint_quant_err subblock_to_move(m_subblock_endpoint_quant_err_vec.back()); - - m_subblock_endpoint_quant_err_vec.pop_back(); - - if (unordered_set_contains(ignore_cluster, subblock_to_move.m_cluster_index)) - continue; - - uint32_t training_vector_index = subblock_to_move.m_block_index * 2 + subblock_to_move.m_subblock_index; - - if (cluster_sizes[subblock_to_move.m_cluster_index] <= 2) - continue; - - if (unordered_set_contains(training_vector_was_relocated, training_vector_index)) - continue; - - if (unordered_set_contains(training_vector_was_relocated, training_vector_index ^ 1)) - continue; - -#if 0 - const uint32_t block_index = subblock_to_move.m_block_index; - const etc_block& blk = m_etc1_blocks_etc1s[block_index]; - uint32_t ls, hs; - blk.get_selector_range(ls, hs); - if (ls != hs) - continue; -#endif - - const uint32_t new_endpoint_cluster_index = (uint32_t)m_endpoint_clusters.size(); - - enlarge_vector(m_endpoint_clusters, 1)->push_back(training_vector_index); - enlarge_vector(m_endpoint_cluster_etc_params, 1); - - assert(m_endpoint_clusters.size() == m_endpoint_cluster_etc_params.size()); - - training_vector_was_relocated.insert(training_vector_index); - - m_endpoint_clusters.back().push_back(training_vector_index ^ 1); - training_vector_was_relocated.insert(training_vector_index ^ 1); - - BASISU_FRONTEND_VERIFY(cluster_sizes[subblock_to_move.m_cluster_index] >= 2); - cluster_sizes[subblock_to_move.m_cluster_index] -= 2; - - ignore_cluster.insert(subblock_to_move.m_cluster_index); - - num_new_endpoint_clusters--; - } - - for (uint32_t i = 0; i < num_orig_endpoint_clusters; i++) - { - uint_vec &cluster_indices = m_endpoint_clusters[i]; - - uint_vec new_cluster_indices; - for (uint32_t j = 0; j < cluster_indices.size(); j++) - { - uint32_t training_vector_index = cluster_indices[j]; - - if (!unordered_set_contains(training_vector_was_relocated, training_vector_index)) - new_cluster_indices.push_back(training_vector_index); - } - - if (cluster_indices.size() != new_cluster_indices.size()) - { - BASISU_FRONTEND_VERIFY(new_cluster_indices.size() > 0); - cluster_indices.swap(new_cluster_indices); - } - } - - generate_block_endpoint_clusters(); - } - - // Given each endpoint cluster, gather all the block pixels which are in that cluster and compute optimized ETC1S endpoints for them. - // TODO: Don't optimize endpoint clusters which haven't changed. - void basisu_frontend::generate_endpoint_codebook(uint32_t step) - { - debug_printf("generate_endpoint_codebook\n"); - - m_endpoint_cluster_etc_params.resize(m_endpoint_clusters.size()); - - const uint32_t N = 128; - for (uint32_t cluster_index_iter = 0; cluster_index_iter < m_endpoint_clusters.size(); cluster_index_iter += N) - { - const uint32_t first_index = cluster_index_iter; - const uint32_t last_index = minimum<uint32_t>((uint32_t)m_endpoint_clusters.size(), cluster_index_iter + N); - - m_params.m_pJob_pool->add_job( [this, first_index, last_index, step ] { - - for (uint32_t cluster_index = first_index; cluster_index < last_index; cluster_index++) - { - const std::vector<uint32_t>& cluster_indices = m_endpoint_clusters[cluster_index]; - - BASISU_FRONTEND_VERIFY(cluster_indices.size()); - - const uint32_t total_pixels = (uint32_t)cluster_indices.size() * 8; - - std::vector<color_rgba> cluster_pixels(total_pixels); - - for (uint32_t cluster_indices_iter = 0; cluster_indices_iter < cluster_indices.size(); cluster_indices_iter++) - { - const uint32_t block_index = cluster_indices[cluster_indices_iter] >> 1; - const uint32_t subblock_index = cluster_indices[cluster_indices_iter] & 1; - - const bool flipped = true; - - const color_rgba *pBlock_pixels = get_source_pixel_block(block_index).get_ptr(); - - for (uint32_t pixel_index = 0; pixel_index < 8; pixel_index++) - { - const color_rgba &c = pBlock_pixels[g_etc1_pixel_indices[flipped][subblock_index][pixel_index]]; - cluster_pixels[cluster_indices_iter * 8 + pixel_index] = c; - } - } - - endpoint_cluster_etc_params new_subblock_params; - - { - etc1_optimizer optimizer; - etc1_solution_coordinates solutions[2]; - - etc1_optimizer::params cluster_optimizer_params; - cluster_optimizer_params.m_num_src_pixels = total_pixels; - cluster_optimizer_params.m_pSrc_pixels = &cluster_pixels[0]; - - cluster_optimizer_params.m_use_color4 = false; - cluster_optimizer_params.m_perceptual = m_params.m_perceptual; - - if (m_params.m_compression_level == 0) - cluster_optimizer_params.m_quality = cETCQualityMedium; - else if (m_params.m_compression_level == BASISU_MAX_COMPRESSION_LEVEL) - cluster_optimizer_params.m_quality = cETCQualityUber; - - etc1_optimizer::results cluster_optimizer_results; - - std::vector<uint8_t> cluster_selectors(total_pixels); - cluster_optimizer_results.m_n = total_pixels; - cluster_optimizer_results.m_pSelectors = &cluster_selectors[0]; - - optimizer.init(cluster_optimizer_params, cluster_optimizer_results); - - optimizer.compute(); - - new_subblock_params.m_color_unscaled[0] = cluster_optimizer_results.m_block_color_unscaled; - new_subblock_params.m_inten_table[0] = cluster_optimizer_results.m_block_inten_table; - new_subblock_params.m_color_error[0] = cluster_optimizer_results.m_error; - } - - endpoint_cluster_etc_params &prev_etc_params = m_endpoint_cluster_etc_params[cluster_index]; - - bool use_new_subblock_params = false; - if ((!step) || (!prev_etc_params.m_valid)) - use_new_subblock_params = true; - else - { - assert(prev_etc_params.m_valid); - - uint64_t total_prev_err = 0; - - { - color_rgba block_colors[4]; - - etc_block::get_block_colors5(block_colors, prev_etc_params.m_color_unscaled[0], prev_etc_params.m_inten_table[0], false); - - uint64_t total_err = 0; - - for (uint32_t i = 0; i < total_pixels; i++) - { - const color_rgba &c = cluster_pixels[i]; - - uint64_t best_err = UINT64_MAX; - //uint32_t best_index = 0; - - for (uint32_t s = 0; s < 4; s++) - { - uint64_t err = color_distance(m_params.m_perceptual, c, block_colors[s], false); - if (err < best_err) - { - best_err = err; - //best_index = s; - } - } - - total_err += best_err; - } - - total_prev_err += total_err; - } - - // See if we should update this cluster's endpoints (if the error has actually fallen) - if (total_prev_err > new_subblock_params.m_color_error[0]) - { - use_new_subblock_params = true; - } - } - - if (use_new_subblock_params) - { - new_subblock_params.m_valid = true; - - prev_etc_params = new_subblock_params; - } - - } // cluster_index - - } ); - - } // cluster_index_iter - - m_params.m_pJob_pool->wait_for_all(); - } - - bool basisu_frontend::check_etc1s_constraints() const - { - std::vector<vec2U> block_clusters(m_total_blocks); - - for (int cluster_index = 0; cluster_index < static_cast<int>(m_endpoint_clusters.size()); cluster_index++) - { - const std::vector<uint32_t>& cluster_indices = m_endpoint_clusters[cluster_index]; - - for (uint32_t cluster_indices_iter = 0; cluster_indices_iter < cluster_indices.size(); cluster_indices_iter++) - { - const uint32_t block_index = cluster_indices[cluster_indices_iter] >> 1; - const uint32_t subblock_index = cluster_indices[cluster_indices_iter] & 1; - - block_clusters[block_index][subblock_index] = cluster_index; - - } // cluster_indices_iter - } - - for (uint32_t i = 0; i < m_total_blocks; i++) - { - if (block_clusters[i][0] != block_clusters[i][1]) - return false; - } - - return true; - } - - uint32_t basisu_frontend::refine_endpoint_clusterization() - { - debug_printf("refine_endpoint_clusterization\n"); - - if (m_use_hierarchical_endpoint_codebooks) - compute_endpoint_clusters_within_each_parent_cluster(); - - std::vector<vec2U> block_clusters(m_total_blocks); - - for (int cluster_index = 0; cluster_index < static_cast<int>(m_endpoint_clusters.size()); cluster_index++) - { - const std::vector<uint32_t>& cluster_indices = m_endpoint_clusters[cluster_index]; - - for (uint32_t cluster_indices_iter = 0; cluster_indices_iter < cluster_indices.size(); cluster_indices_iter++) - { - const uint32_t block_index = cluster_indices[cluster_indices_iter] >> 1; - const uint32_t subblock_index = cluster_indices[cluster_indices_iter] & 1; - - block_clusters[block_index][subblock_index] = cluster_index; - - } // cluster_indices_iter - } - - //---------------------------------------------------------- - - // Create a new endpoint clusterization - - uint_vec best_cluster_indices(m_total_blocks); - - const uint32_t N = 1024; - for (uint32_t block_index_iter = 0; block_index_iter < m_total_blocks; block_index_iter += N) - { - const uint32_t first_index = block_index_iter; - const uint32_t last_index = minimum<uint32_t>(m_total_blocks, first_index + N); - - m_params.m_pJob_pool->add_job( [this, first_index, last_index, &best_cluster_indices, &block_clusters] { - - for (uint32_t block_index = first_index; block_index < last_index; block_index++) - { - const bool is_flipped = true; - - const uint32_t cluster_index = block_clusters[block_index][0]; - BASISU_FRONTEND_VERIFY(cluster_index == block_clusters[block_index][1]); - - const color_rgba *subblock_pixels = get_source_pixel_block(block_index).get_ptr(); - const uint32_t num_subblock_pixels = 16; - - uint64_t best_cluster_err = UINT64_MAX; - uint32_t best_cluster_index = 0; - - const uint32_t block_parent_endpoint_cluster_index = m_block_parent_endpoint_cluster.size() ? m_block_parent_endpoint_cluster[block_index] : 0; - const uint_vec *pCluster_indices = m_endpoint_clusters_within_each_parent_cluster.size() ? &m_endpoint_clusters_within_each_parent_cluster[block_parent_endpoint_cluster_index] : nullptr; - - const uint32_t total_clusters = m_use_hierarchical_endpoint_codebooks ? (uint32_t)pCluster_indices->size() : (uint32_t)m_endpoint_clusters.size(); - - for (uint32_t i = 0; i < total_clusters; i++) - { - const uint32_t cluster_iter = m_use_hierarchical_endpoint_codebooks ? (*pCluster_indices)[i] : i; - - color_rgba cluster_etc_base_color(m_endpoint_cluster_etc_params[cluster_iter].m_color_unscaled[0]); - uint32_t cluster_etc_inten = m_endpoint_cluster_etc_params[cluster_iter].m_inten_table[0]; - - uint64_t total_err = 0; - - const uint32_t low_selector = 0;//subblock_etc_params_vec[j].m_low_selectors[0]; - const uint32_t high_selector = 3;//subblock_etc_params_vec[j].m_high_selectors[0]; - color_rgba subblock_colors[4]; - // Can't assign it here - may result in too much error when selector quant occurs - if (cluster_etc_inten > m_endpoint_cluster_etc_params[cluster_index].m_inten_table[0]) - { - total_err = UINT64_MAX; - goto skip_cluster; - } - - etc_block::get_block_colors5(subblock_colors, cluster_etc_base_color, cluster_etc_inten); - - for (uint32_t p = 0; p < num_subblock_pixels; p++) - { - uint64_t best_err = UINT64_MAX; - - for (uint32_t r = low_selector; r <= high_selector; r++) - { - uint64_t err = color_distance(m_params.m_perceptual, subblock_pixels[p], subblock_colors[r], false); - best_err = minimum(best_err, err); - if (!best_err) - break; - } - - total_err += best_err; - if (total_err > best_cluster_err) - break; - } // p - - skip_cluster: - if ((total_err < best_cluster_err) || - ((cluster_iter == cluster_index) && (total_err == best_cluster_err))) - { - best_cluster_err = total_err; - best_cluster_index = cluster_iter; - - if (!best_cluster_err) - break; - } - } // j - - best_cluster_indices[block_index] = best_cluster_index; - - } // block_index - - } ); - - } // block_index_iter - - m_params.m_pJob_pool->wait_for_all(); - - std::vector<typename std::vector<uint32_t> > optimized_endpoint_clusters(m_endpoint_clusters.size()); - uint32_t total_subblocks_reassigned = 0; - - for (uint32_t block_index = 0; block_index < m_total_blocks; block_index++) - { - const uint32_t training_vector_index = block_index * 2 + 0; - - const uint32_t orig_cluster_index = block_clusters[block_index][0]; - const uint32_t best_cluster_index = best_cluster_indices[block_index]; - - optimized_endpoint_clusters[best_cluster_index].push_back(training_vector_index); - optimized_endpoint_clusters[best_cluster_index].push_back(training_vector_index + 1); - - if (best_cluster_index != orig_cluster_index) - { - total_subblocks_reassigned++; - } - } - - debug_printf("total_subblocks_reassigned: %u\n", total_subblocks_reassigned); - - m_endpoint_clusters = optimized_endpoint_clusters; - - return total_subblocks_reassigned; - } - - void basisu_frontend::eliminate_redundant_or_empty_endpoint_clusters() - { - debug_printf("eliminate_redundant_or_empty_endpoint_clusters\n"); - - // Step 1: Sort endpoint clusters by the base colors/intens - - uint_vec sorted_endpoint_cluster_indices(m_endpoint_clusters.size()); - for (uint32_t i = 0; i < m_endpoint_clusters.size(); i++) - sorted_endpoint_cluster_indices[i] = i; - - indirect_sort((uint32_t)m_endpoint_clusters.size(), &sorted_endpoint_cluster_indices[0], &m_endpoint_cluster_etc_params[0]); - - std::vector<std::vector<uint32_t> > new_endpoint_clusters(m_endpoint_clusters.size()); - std::vector<endpoint_cluster_etc_params> new_subblock_etc_params(m_endpoint_clusters.size()); - - for (uint32_t i = 0; i < m_endpoint_clusters.size(); i++) - { - uint32_t j = sorted_endpoint_cluster_indices[i]; - new_endpoint_clusters[i] = m_endpoint_clusters[j]; - new_subblock_etc_params[i] = m_endpoint_cluster_etc_params[j]; - } - - new_endpoint_clusters.swap(m_endpoint_clusters); - new_subblock_etc_params.swap(m_endpoint_cluster_etc_params); - - // Step 2: Eliminate redundant endpoint clusters, or empty endpoint clusters - - new_endpoint_clusters.resize(0); - new_subblock_etc_params.resize(0); - - for (int i = 0; i < (int)m_endpoint_clusters.size(); ) - { - if (!m_endpoint_clusters[i].size()) - { - i++; - continue; - } - - int j; - for (j = i + 1; j < (int)m_endpoint_clusters.size(); j++) - { - if (!(m_endpoint_cluster_etc_params[i] == m_endpoint_cluster_etc_params[j])) - break; - } - - new_endpoint_clusters.push_back(m_endpoint_clusters[i]); - new_subblock_etc_params.push_back(m_endpoint_cluster_etc_params[i]); - - for (int k = i + 1; k < j; k++) - { - append_vector(new_endpoint_clusters.back(), m_endpoint_clusters[k]); - } - - i = j; - } - - if (m_endpoint_clusters.size() != new_endpoint_clusters.size()) - { - if (m_params.m_debug_stats) - debug_printf("Eliminated %u redundant or empty clusters\n", (uint32_t)(m_endpoint_clusters.size() - new_endpoint_clusters.size())); - - m_endpoint_clusters.swap(new_endpoint_clusters); - - m_endpoint_cluster_etc_params.swap(new_subblock_etc_params); - } - } - - void basisu_frontend::create_initial_packed_texture() - { - debug_printf("create_initial_packed_texture\n"); - - const uint32_t N = 4096; - for (uint32_t block_index_iter = 0; block_index_iter < m_total_blocks; block_index_iter += N) - { - const uint32_t first_index = block_index_iter; - const uint32_t last_index = minimum<uint32_t>(m_total_blocks, first_index + N); - - m_params.m_pJob_pool->add_job( [this, first_index, last_index] { - - for (uint32_t block_index = first_index; block_index < last_index; block_index++) - { - uint32_t cluster0 = m_block_endpoint_clusters_indices[block_index][0]; - uint32_t cluster1 = m_block_endpoint_clusters_indices[block_index][1]; - BASISU_FRONTEND_VERIFY(cluster0 == cluster1); - - const color_rgba *pSource_pixels = get_source_pixel_block(block_index).get_ptr(); - - etc_block &blk = m_encoded_blocks[block_index]; - - color_rgba unscaled[2] = { m_endpoint_cluster_etc_params[cluster0].m_color_unscaled[0], m_endpoint_cluster_etc_params[cluster1].m_color_unscaled[0] }; - uint32_t inten[2] = { m_endpoint_cluster_etc_params[cluster0].m_inten_table[0], m_endpoint_cluster_etc_params[cluster1].m_inten_table[0] }; - - blk.set_block_color5(unscaled[0], unscaled[1]); - blk.set_flip_bit(true); - - blk.set_inten_table(0, inten[0]); - blk.set_inten_table(1, inten[1]); - - blk.determine_selectors(pSource_pixels, m_params.m_perceptual); - - } // block_index - - } ); - - } // block_index_iter - - m_params.m_pJob_pool->wait_for_all(); - - m_orig_encoded_blocks = m_encoded_blocks; - } - - void basisu_frontend::compute_selector_clusters_within_each_parent_cluster() - { - uint_vec block_selector_cluster_indices(m_total_blocks); - - for (int cluster_index = 0; cluster_index < static_cast<int>(m_selector_cluster_indices.size()); cluster_index++) - { - const std::vector<uint32_t>& cluster_indices = m_selector_cluster_indices[cluster_index]; - - for (uint32_t cluster_indices_iter = 0; cluster_indices_iter < cluster_indices.size(); cluster_indices_iter++) - { - const uint32_t block_index = cluster_indices[cluster_indices_iter]; - - block_selector_cluster_indices[block_index] = cluster_index; - - } // cluster_indices_iter - - } // cluster_index - - m_selector_clusters_within_each_parent_cluster.resize(0); - m_selector_clusters_within_each_parent_cluster.resize(m_selector_parent_cluster_indices.size()); - - for (uint32_t block_index = 0; block_index < m_total_blocks; block_index++) - { - const uint32_t cluster_index = block_selector_cluster_indices[block_index]; - const uint32_t parent_cluster_index = m_block_parent_selector_cluster[block_index]; - - m_selector_clusters_within_each_parent_cluster[parent_cluster_index].push_back(cluster_index); - } - - for (uint32_t i = 0; i < m_selector_clusters_within_each_parent_cluster.size(); i++) - { - uint_vec &cluster_indices = m_selector_clusters_within_each_parent_cluster[i]; - - BASISU_FRONTEND_VERIFY(cluster_indices.size()); - - vector_sort(cluster_indices); - - auto last = std::unique(cluster_indices.begin(), cluster_indices.end()); - cluster_indices.erase(last, cluster_indices.end()); - } - } - - void basisu_frontend::generate_selector_clusters() - { - debug_printf("generate_selector_clusters\n"); - - typedef vec<16, float> vec16F; - typedef tree_vector_quant<vec16F> vec16F_clusterizer; - - vec16F_clusterizer::array_of_weighted_training_vecs training_vecs(m_total_blocks); - - const uint32_t N = 4096; - for (uint32_t block_index_iter = 0; block_index_iter < m_total_blocks; block_index_iter += N) - { - const uint32_t first_index = block_index_iter; - const uint32_t last_index = minimum<uint32_t>(m_total_blocks, first_index + N); - - m_params.m_pJob_pool->add_job( [this, first_index, last_index, &training_vecs] { - - for (uint32_t block_index = first_index; block_index < last_index; block_index++) - { - const etc_block &blk = m_encoded_blocks[block_index]; - - vec16F v; - for (uint32_t y = 0; y < 4; y++) - for (uint32_t x = 0; x < 4; x++) - v[x + y * 4] = static_cast<float>(blk.get_selector(x, y)); - - const uint32_t subblock_index = (blk.get_inten_table(0) > blk.get_inten_table(1)) ? 0 : 1; - - color_rgba block_colors[2]; - blk.get_block_low_high_colors(block_colors, subblock_index); - - const uint32_t dist = color_distance(m_params.m_perceptual, block_colors[0], block_colors[1], false); - - const uint32_t cColorDistToWeight = 300; - const uint32_t cMaxWeight = 4096; - uint32_t weight = clamp<uint32_t>(dist / cColorDistToWeight, 1, cMaxWeight); - - training_vecs[block_index].first = v; - training_vecs[block_index].second = weight; - - } // block_index - - } ); - - } // block_index_iter - - m_params.m_pJob_pool->wait_for_all(); - - vec16F_clusterizer selector_clusterizer; - for (uint32_t i = 0; i < m_total_blocks; i++) - selector_clusterizer.add_training_vec(training_vecs[i].first, training_vecs[i].second); - - const uint32_t parent_codebook_size = (m_params.m_max_selector_clusters >= 256) ? BASISU_SELECTOR_PARENT_CODEBOOK_SIZE : 0; - - uint32_t max_threads = 0; - max_threads = m_params.m_multithreaded ? minimum<int>(std::thread::hardware_concurrency(), cMaxCodebookCreationThreads) : 0; - - bool status = generate_hierarchical_codebook_threaded(selector_clusterizer, - m_params.m_max_selector_clusters, m_use_hierarchical_selector_codebooks ? parent_codebook_size : 0, - m_selector_cluster_indices, - m_selector_parent_cluster_indices, - max_threads, m_params.m_pJob_pool); - BASISU_FRONTEND_VERIFY(status); - - if (m_use_hierarchical_selector_codebooks) - { - if (!m_selector_parent_cluster_indices.size()) - { - m_selector_parent_cluster_indices.resize(0); - m_selector_parent_cluster_indices.resize(1); - for (uint32_t i = 0; i < m_total_blocks; i++) - m_selector_parent_cluster_indices[0].push_back(i); - } - - BASISU_ASSUME(BASISU_SELECTOR_PARENT_CODEBOOK_SIZE <= UINT8_MAX); - - m_block_parent_selector_cluster.resize(0); - m_block_parent_selector_cluster.resize(m_total_blocks); - vector_set_all(m_block_parent_selector_cluster, 0xFF); - - for (uint32_t parent_cluster_index = 0; parent_cluster_index < m_selector_parent_cluster_indices.size(); parent_cluster_index++) - { - const uint_vec &cluster = m_selector_parent_cluster_indices[parent_cluster_index]; - for (uint32_t j = 0; j < cluster.size(); j++) - m_block_parent_selector_cluster[cluster[j]] = static_cast<uint8_t>(parent_cluster_index); - } - for (uint32_t i = 0; i < m_total_blocks; i++) - { - BASISU_FRONTEND_VERIFY(m_block_parent_selector_cluster[i] != 0xFF); - } - - // Ensure that all the blocks within each cluster are all in the same parent cluster, or something is very wrong. - for (uint32_t cluster_index = 0; cluster_index < m_selector_cluster_indices.size(); cluster_index++) - { - const uint_vec &cluster = m_selector_cluster_indices[cluster_index]; - - uint32_t parent_cluster_index = 0; - for (uint32_t j = 0; j < cluster.size(); j++) - { - const uint32_t block_index = cluster[j]; - if (!j) - { - parent_cluster_index = m_block_parent_selector_cluster[block_index]; - } - else - { - BASISU_FRONTEND_VERIFY(m_block_parent_selector_cluster[block_index] == parent_cluster_index); - } - } - } - } - - debug_printf("Total selector clusters: %u, total parent selector clusters: %u\n", (uint32_t)m_selector_cluster_indices.size(), (uint32_t)m_selector_parent_cluster_indices.size()); - } - - void basisu_frontend::create_optimized_selector_codebook(uint32_t iter) - { - debug_printf("create_optimized_selector_codebook\n"); - - const uint32_t total_selector_clusters = (uint32_t)m_selector_cluster_indices.size(); - - m_optimized_cluster_selectors.resize(total_selector_clusters); - - if ((m_params.m_pGlobal_sel_codebook) && (!m_params.m_use_hybrid_selector_codebooks)) - { - uint32_t total_clusters_processed = 0; - - m_optimized_cluster_selector_global_cb_ids.resize(total_selector_clusters); - - const uint32_t N = 256; - for (uint32_t cluster_index_iter = 0; cluster_index_iter < total_selector_clusters; cluster_index_iter += N) - { - const uint32_t first_index = cluster_index_iter; - const uint32_t last_index = minimum<uint32_t>((uint32_t)total_selector_clusters, cluster_index_iter + N); - - m_params.m_pJob_pool->add_job( [this, first_index, last_index, &total_clusters_processed, &total_selector_clusters] { - - for (uint32_t cluster_index = first_index; cluster_index < last_index; cluster_index++) - { - const std::vector<uint32_t> &cluster_block_indices = m_selector_cluster_indices[cluster_index]; - - if (!cluster_block_indices.size()) - continue; - - etc_block_vec etc_blocks; - pixel_block_vec pixel_blocks; - - for (uint32_t cluster_block_index = 0; cluster_block_index < cluster_block_indices.size(); cluster_block_index++) - { - const uint32_t block_index = cluster_block_indices[cluster_block_index]; - - etc_blocks.push_back(m_encoded_blocks[block_index]); - - pixel_blocks.push_back(get_source_pixel_block(block_index)); - } - - uint32_t palette_index; - basist::etc1_global_palette_entry_modifier palette_modifier; - - #if 0 - m_params.m_pGlobal_sel_codebook->find_best_entry(etc_blocks.size(), pixel_blocks.get_ptr(), etc_blocks.get_ptr(), - palette_index, palette_modifier, - m_params.m_perceptual, 1 << m_params.m_num_global_sel_codebook_pal_bits, 1 << m_params.m_num_global_sel_codebook_mod_bits); - #else - etc1_global_selector_codebook_find_best_entry(*m_params.m_pGlobal_sel_codebook, - (uint32_t)etc_blocks.size(), &pixel_blocks[0], &etc_blocks[0], - palette_index, palette_modifier, - m_params.m_perceptual, 1 << m_params.m_num_global_sel_codebook_pal_bits, 1 << m_params.m_num_global_sel_codebook_mod_bits); - #endif - - m_optimized_cluster_selector_global_cb_ids[cluster_index].set(palette_index, palette_modifier); - - basist::etc1_selector_palette_entry pal_entry(m_params.m_pGlobal_sel_codebook->get_entry(palette_index, palette_modifier)); - - for (uint32_t y = 0; y < 4; y++) - for (uint32_t x = 0; x < 4; x++) - m_optimized_cluster_selectors[cluster_index].set_selector(x, y, pal_entry(x, y)); - - { - std::lock_guard<std::mutex> lock(m_lock); - - total_clusters_processed++; - if ((total_clusters_processed % 63) == 0) - debug_printf("Global selector palette optimization: %3.1f%% complete\n", total_clusters_processed * 100.0f / total_selector_clusters); - } - - } // cluster_index - - } ); - - } // cluster_index_iter - - m_params.m_pJob_pool->wait_for_all(); - } - else - { - const bool uses_hybrid_sel_codebook = ((m_params.m_pGlobal_sel_codebook) && (m_params.m_use_hybrid_selector_codebooks)); - if (uses_hybrid_sel_codebook) - { - m_selector_cluster_uses_global_cb.resize(total_selector_clusters); - m_optimized_cluster_selector_global_cb_ids.resize(total_selector_clusters); - } - - uint32_t total_clusters_processed = 0; - - // For each selector codebook entry, and for each of the 4x4 selectors, determine which selector minimizes the error across all the blocks that use that quantized selector. - - const uint32_t N = 256; - for (uint32_t cluster_index_iter = 0; cluster_index_iter < total_selector_clusters; cluster_index_iter += N) - { - const uint32_t first_index = cluster_index_iter; - const uint32_t last_index = minimum<uint32_t>((uint32_t)total_selector_clusters, cluster_index_iter + N); - - m_params.m_pJob_pool->add_job( [this, first_index, last_index, &uses_hybrid_sel_codebook, &total_clusters_processed, &total_selector_clusters] { - - for (uint32_t cluster_index = first_index; cluster_index < last_index; cluster_index++) - { - const std::vector<uint32_t> &cluster_block_indices = m_selector_cluster_indices[cluster_index]; - - if (!cluster_block_indices.size()) - continue; - - uint64_t overall_best_err = 0; - - for (uint32_t y = 0; y < 4; y++) - { - for (uint32_t x = 0; x < 4; x++) - { - uint64_t best_err = UINT64_MAX; - uint32_t best_s = 0; - - for (uint32_t s = 0; s < 4; s++) - { - uint32_t total_err = 0; - - for (uint32_t cluster_block_index = 0; cluster_block_index < cluster_block_indices.size(); cluster_block_index++) - { - const uint32_t block_index = cluster_block_indices[cluster_block_index]; - - const etc_block &blk = m_encoded_blocks[block_index]; - - const color_rgba &orig_color = get_source_pixel_block(block_index)(x, y); - - color_rgba block_color; - blk.get_block_color(block_color, blk.get_subblock_index(x, y), s); - total_err += color_distance(m_params.m_perceptual, block_color, orig_color, false); - - if (total_err > best_err) - break; - - } // block_index - - if (total_err < best_err) - { - best_err = total_err; - best_s = s; - if (!best_err) - break; - } - - } // s - - m_optimized_cluster_selectors[cluster_index].set_selector(x, y, best_s); - - overall_best_err += best_err; - - } // x - } // y - - if (uses_hybrid_sel_codebook) - { - etc_block_vec etc_blocks; - pixel_block_vec pixel_blocks; - - for (uint32_t cluster_block_index = 0; cluster_block_index < cluster_block_indices.size(); cluster_block_index++) - { - const uint32_t block_index = cluster_block_indices[cluster_block_index]; - - etc_blocks.push_back(m_encoded_blocks[block_index]); - - pixel_blocks.push_back(get_source_pixel_block(block_index)); - } - - uint32_t palette_index; - basist::etc1_global_palette_entry_modifier palette_modifier; - - #if 0 - uint64_t best_global_cb_err = m_params.m_pGlobal_sel_codebook->find_best_entry(etc_blocks.size(), pixel_blocks.get_ptr(), etc_blocks.get_ptr(), - palette_index, palette_modifier, - m_params.m_perceptual, 1 << m_params.m_num_global_sel_codebook_pal_bits, 1 << m_params.m_num_global_sel_codebook_mod_bits); - #else - uint64_t best_global_cb_err = etc1_global_selector_codebook_find_best_entry(*m_params.m_pGlobal_sel_codebook, (uint32_t)etc_blocks.size(), &pixel_blocks[0], &etc_blocks[0], - palette_index, palette_modifier, - m_params.m_perceptual, 1 << m_params.m_num_global_sel_codebook_pal_bits, 1 << m_params.m_num_global_sel_codebook_mod_bits); - #endif - - if (best_global_cb_err <= overall_best_err * m_params.m_hybrid_codebook_quality_thresh) - { - m_selector_cluster_uses_global_cb[cluster_index] = true; - - m_optimized_cluster_selector_global_cb_ids[cluster_index].set(palette_index, palette_modifier); - - basist::etc1_selector_palette_entry pal_entry(m_params.m_pGlobal_sel_codebook->get_entry(palette_index, palette_modifier)); - - for (uint32_t y = 0; y < 4; y++) - for (uint32_t x = 0; x < 4; x++) - m_optimized_cluster_selectors[cluster_index].set_selector(x, y, pal_entry(x, y)); - } - else - { - m_optimized_cluster_selector_global_cb_ids[cluster_index].set(0, basist::etc1_global_palette_entry_modifier(0)); - - m_selector_cluster_uses_global_cb[cluster_index] = false; - } - } - - if (uses_hybrid_sel_codebook) - { - std::lock_guard<std::mutex> lock(m_lock); - - total_clusters_processed++; - if ((total_clusters_processed % 63) == 0) - debug_printf("Global selector palette optimization: %3.1f%% complete\n", total_clusters_processed * 100.0f / total_selector_clusters); - } - - } // cluster_index - - } ); - - } // cluster_index_iter - - m_params.m_pJob_pool->wait_for_all(); - - } // if (m_params.m_pGlobal_sel_codebook) - - if (m_params.m_debug_images) - { - uint32_t max_selector_cluster_size = 0; - - for (uint32_t i = 0; i < m_selector_cluster_indices.size(); i++) - max_selector_cluster_size = maximum<uint32_t>(max_selector_cluster_size, (uint32_t)m_selector_cluster_indices[i].size()); - - if ((max_selector_cluster_size * 5) < 32768) - { - const uint32_t x_spacer_len = 16; - image selector_cluster_vis(x_spacer_len + max_selector_cluster_size * 5, (uint32_t)m_selector_cluster_indices.size() * 5); - - for (uint32_t selector_cluster_index = 0; selector_cluster_index < m_selector_cluster_indices.size(); selector_cluster_index++) - { - const std::vector<uint32_t> &cluster_block_indices = m_selector_cluster_indices[selector_cluster_index]; - - for (uint32_t y = 0; y < 4; y++) - for (uint32_t x = 0; x < 4; x++) - selector_cluster_vis.set_clipped(x_spacer_len + x - 12, selector_cluster_index * 5 + y, color_rgba((m_optimized_cluster_selectors[selector_cluster_index].get_selector(x, y) * 255) / 3)); - - for (uint32_t i = 0; i < cluster_block_indices.size(); i++) - { - uint32_t block_index = cluster_block_indices[i]; - - const etc_block &blk = m_orig_encoded_blocks[block_index]; - - for (uint32_t y = 0; y < 4; y++) - for (uint32_t x = 0; x < 4; x++) - selector_cluster_vis.set_clipped(x_spacer_len + x + 5 * i, selector_cluster_index * 5 + y, color_rgba((blk.get_selector(x, y) * 255) / 3)); - } - } - - char buf[256]; - snprintf(buf, sizeof(buf), "selector_cluster_vis_%u.png", iter); - save_png(buf, selector_cluster_vis); - } - } - } - - void basisu_frontend::find_optimal_selector_clusters_for_each_block() - { - debug_printf("find_optimal_selector_clusters_for_each_block\n"); - - m_block_selector_cluster_index.resize(m_total_blocks); - - if (m_params.m_compression_level == 0) - { - // Don't do anything, just leave the blocks in their original selector clusters. - for (uint32_t i = 0; i < m_selector_cluster_indices.size(); i++) - { - for (uint32_t j = 0; j < m_selector_cluster_indices[i].size(); j++) - m_block_selector_cluster_index[m_selector_cluster_indices[i][j]] = i; - } - } - else - { - std::vector< std::vector<uint32_t> > new_cluster_indices; - - // For each block: Determine which quantized selectors best encode that block, given its quantized endpoints. - - const uint32_t N = 1024; - for (uint32_t block_index_iter = 0; block_index_iter < m_total_blocks; block_index_iter += N) - { - const uint32_t first_index = block_index_iter; - const uint32_t last_index = minimum<uint32_t>(m_total_blocks, first_index + N); - - m_params.m_pJob_pool->add_job( [this, first_index, last_index, &new_cluster_indices] { - - for (uint32_t block_index = first_index; block_index < last_index; block_index++) - { - const color_rgba* pBlock_pixels = get_source_pixel_block(block_index).get_ptr(); - - etc_block& blk = m_encoded_blocks[block_index]; - - color_rgba trial_block_colors[4]; - blk.get_block_colors(trial_block_colors, 0); - - uint64_t best_cluster_err = UINT64_MAX; - uint32_t best_cluster_index = 0; - - const uint32_t parent_selector_cluster = m_block_parent_selector_cluster.size() ? m_block_parent_selector_cluster[block_index] : 0; - const uint_vec *pCluster_indices = m_selector_clusters_within_each_parent_cluster.size() ? &m_selector_clusters_within_each_parent_cluster[parent_selector_cluster] : nullptr; - - const uint32_t total_clusters = m_use_hierarchical_selector_codebooks ? (uint32_t)pCluster_indices->size() : (uint32_t)m_selector_cluster_indices.size(); - - for (uint32_t cluster_iter = 0; cluster_iter < total_clusters; cluster_iter++) - { - const uint32_t cluster_index = m_use_hierarchical_selector_codebooks ? (*pCluster_indices)[cluster_iter] : cluster_iter; - - const etc_block& cluster_blk = m_optimized_cluster_selectors[cluster_index]; - - uint64_t trial_err = 0; - for (int y = 0; y < 4; y++) - { - for (int x = 0; x < 4; x++) - { - const uint32_t sel = cluster_blk.get_selector(x, y); - - trial_err += color_distance(m_params.m_perceptual, trial_block_colors[sel], pBlock_pixels[x + y * 4], false); - if (trial_err > best_cluster_err) - goto early_out; - } - } - - if (trial_err < best_cluster_err) - { - best_cluster_err = trial_err; - best_cluster_index = cluster_index; - if (!best_cluster_err) - break; - } - - early_out: - ; - } - - blk.set_raw_selector_bits(m_optimized_cluster_selectors[best_cluster_index].get_raw_selector_bits()); - - m_block_selector_cluster_index[block_index] = best_cluster_index; - - { - std::lock_guard<std::mutex> lock(m_lock); - - vector_ensure_element_is_valid(new_cluster_indices, best_cluster_index); - new_cluster_indices[best_cluster_index].push_back(block_index); - } - - } // block_index - - } ); - - } // block_index_iter - - m_params.m_pJob_pool->wait_for_all(); - - m_selector_cluster_indices.swap(new_cluster_indices); - } - - for (uint32_t i = 0; i < m_selector_cluster_indices.size(); i++) - vector_sort(m_selector_cluster_indices[i]); - } - - // TODO: Remove old ETC1 specific stuff, and thread this. - uint32_t basisu_frontend::refine_block_endpoints_given_selectors() - { - debug_printf("refine_block_endpoints_given_selectors\n"); - - for (int block_index = 0; block_index < static_cast<int>(m_total_blocks); block_index++) - { - //uint32_t selector_cluster = m_block_selector_cluster_index(block_x, block_y); - vec2U &endpoint_clusters = m_block_endpoint_clusters_indices[block_index]; - - m_endpoint_cluster_etc_params[endpoint_clusters[0]].m_subblocks.push_back(block_index * 2); - - m_endpoint_cluster_etc_params[endpoint_clusters[1]].m_subblocks.push_back(block_index * 2 + 1); - } - - uint32_t total_subblocks_refined = 0; - uint32_t total_subblocks_examined = 0; - - for (uint32_t endpoint_cluster_index = 0; endpoint_cluster_index < m_endpoint_cluster_etc_params.size(); endpoint_cluster_index++) - { - endpoint_cluster_etc_params &subblock_params = m_endpoint_cluster_etc_params[endpoint_cluster_index]; - - const uint_vec &subblocks = subblock_params.m_subblocks; - //uint32_t total_pixels = subblock.m_subblocks.size() * 8; - - std::vector<color_rgba> subblock_colors[2]; // [use_individual_mode] - uint8_vec subblock_selectors[2]; - - uint64_t cur_subblock_err[2] = { 0, 0 }; - - for (uint32_t subblock_iter = 0; subblock_iter < subblocks.size(); subblock_iter++) - { - uint32_t training_vector_index = subblocks[subblock_iter]; - - uint32_t block_index = training_vector_index >> 1; - uint32_t subblock_index = training_vector_index & 1; - const bool is_flipped = true; - - const etc_block &blk = m_encoded_blocks[block_index]; - - const bool use_individual_mode = !blk.get_diff_bit(); - - const color_rgba *pSource_block_pixels = get_source_pixel_block(block_index).get_ptr(); - - color_rgba unpacked_block_pixels[16]; - unpack_etc1(blk, unpacked_block_pixels); - - for (uint32_t i = 0; i < 8; i++) - { - const uint32_t pixel_index = g_etc1_pixel_indices[is_flipped][subblock_index][i]; - const etc_coord2 &coords = g_etc1_pixel_coords[is_flipped][subblock_index][i]; - - subblock_colors[use_individual_mode].push_back(pSource_block_pixels[pixel_index]); - - cur_subblock_err[use_individual_mode] += color_distance(m_params.m_perceptual, pSource_block_pixels[pixel_index], unpacked_block_pixels[pixel_index], false); - - subblock_selectors[use_individual_mode].push_back(static_cast<uint8_t>(blk.get_selector(coords.m_x, coords.m_y))); - } - } // subblock_iter - - etc1_optimizer::results cluster_optimizer_results[2]; - bool results_valid[2] = { false, false }; - - clear_obj(cluster_optimizer_results); - - std::vector<uint8_t> cluster_selectors[2]; - - for (uint32_t use_individual_mode = 0; use_individual_mode < 2; use_individual_mode++) - { - const uint32_t total_pixels = (uint32_t)subblock_colors[use_individual_mode].size(); - - if (!total_pixels) - continue; - - total_subblocks_examined += total_pixels / 8; - - etc1_optimizer optimizer; - etc1_solution_coordinates solutions[2]; - - etc1_optimizer::params cluster_optimizer_params; - cluster_optimizer_params.m_num_src_pixels = total_pixels; - cluster_optimizer_params.m_pSrc_pixels = &subblock_colors[use_individual_mode][0]; - - cluster_optimizer_params.m_use_color4 = use_individual_mode != 0; - cluster_optimizer_params.m_perceptual = m_params.m_perceptual; - - cluster_optimizer_params.m_pForce_selectors = &subblock_selectors[use_individual_mode][0]; - cluster_optimizer_params.m_quality = cETCQualityUber; - - cluster_selectors[use_individual_mode].resize(total_pixels); - - cluster_optimizer_results[use_individual_mode].m_n = total_pixels; - cluster_optimizer_results[use_individual_mode].m_pSelectors = &cluster_selectors[use_individual_mode][0]; - - optimizer.init(cluster_optimizer_params, cluster_optimizer_results[use_individual_mode]); - - if (!optimizer.compute()) - continue; - - if (cluster_optimizer_results[use_individual_mode].m_error < cur_subblock_err[use_individual_mode]) - results_valid[use_individual_mode] = true; - - } // use_individual_mode - - for (uint32_t use_individual_mode = 0; use_individual_mode < 2; use_individual_mode++) - { - if (!results_valid[use_individual_mode]) - continue; - - uint32_t num_passes = use_individual_mode ? 1 : 2; - - bool all_passed5 = true; - - for (uint32_t pass = 0; pass < num_passes; pass++) - { - for (uint32_t subblock_iter = 0; subblock_iter < subblocks.size(); subblock_iter++) - { - const uint32_t training_vector_index = subblocks[subblock_iter]; - - const uint32_t block_index = training_vector_index >> 1; - const uint32_t subblock_index = training_vector_index & 1; - const bool is_flipped = true; - - etc_block &blk = m_encoded_blocks[block_index]; - - if (!blk.get_diff_bit() != static_cast<bool>(use_individual_mode != 0)) - continue; - - if (use_individual_mode) - { - blk.set_base4_color(subblock_index, etc_block::pack_color4(cluster_optimizer_results[1].m_block_color_unscaled, false)); - blk.set_inten_table(subblock_index, cluster_optimizer_results[1].m_block_inten_table); - - subblock_params.m_color_error[1] = cluster_optimizer_results[1].m_error; - subblock_params.m_inten_table[1] = cluster_optimizer_results[1].m_block_inten_table; - subblock_params.m_color_unscaled[1] = cluster_optimizer_results[1].m_block_color_unscaled; - - total_subblocks_refined++; - } - else - { - const uint16_t base_color5 = blk.get_base5_color(); - const uint16_t delta_color3 = blk.get_delta3_color(); - - uint32_t r[2], g[2], b[2]; - etc_block::unpack_color5(r[0], g[0], b[0], base_color5, false); - bool success = etc_block::unpack_color5(r[1], g[1], b[1], base_color5, delta_color3, false); - assert(success); - BASISU_NOTE_UNUSED(success); - - r[subblock_index] = cluster_optimizer_results[0].m_block_color_unscaled.r; - g[subblock_index] = cluster_optimizer_results[0].m_block_color_unscaled.g; - b[subblock_index] = cluster_optimizer_results[0].m_block_color_unscaled.b; - - color_rgba colors[2] = { color_rgba(r[0], g[0], b[0], 255), color_rgba(r[1], g[1], b[1], 255) }; - - if (!etc_block::try_pack_color5_delta3(colors)) - { - all_passed5 = false; - break; - } - - if ((pass == 1) && (all_passed5)) - { - blk.set_block_color5(colors[0], colors[1]); - blk.set_inten_table(subblock_index, cluster_optimizer_results[0].m_block_inten_table); - - subblock_params.m_color_error[0] = cluster_optimizer_results[0].m_error; - subblock_params.m_inten_table[0] = cluster_optimizer_results[0].m_block_inten_table; - subblock_params.m_color_unscaled[0] = cluster_optimizer_results[0].m_block_color_unscaled; - - total_subblocks_refined++; - } - } - - } // subblock_iter - - } // pass - - } // use_individual_mode - - } // endpoint_cluster_index - - if (m_params.m_debug_stats) - debug_printf("Total subblock endpoints refined: %u (%3.1f%%)\n", total_subblocks_refined, total_subblocks_refined * 100.0f / total_subblocks_examined); - - return total_subblocks_refined; - } - - void basisu_frontend::dump_endpoint_clusterization_visualization(const char *pFilename, bool vis_endpoint_colors) - { - debug_printf("dump_endpoint_clusterization_visualization\n"); - - uint32_t max_endpoint_cluster_size = 0; - - std::vector<uint32_t> cluster_sizes(m_endpoint_clusters.size()); - std::vector<uint32_t> sorted_cluster_indices(m_endpoint_clusters.size()); - for (uint32_t i = 0; i < m_endpoint_clusters.size(); i++) - { - max_endpoint_cluster_size = maximum<uint32_t>(max_endpoint_cluster_size, (uint32_t)m_endpoint_clusters[i].size()); - cluster_sizes[i] = (uint32_t)m_endpoint_clusters[i].size(); - } - - if (!max_endpoint_cluster_size) - return; - - for (uint32_t i = 0; i < m_endpoint_clusters.size(); i++) - sorted_cluster_indices[i] = i; - - //indexed_heap_sort(endpoint_clusters.size(), cluster_sizes.get_ptr(), sorted_cluster_indices.get_ptr()); - - image endpoint_cluster_vis(12 + minimum<uint32_t>(max_endpoint_cluster_size, 2048) * 5, (uint32_t)m_endpoint_clusters.size() * 3); - - for (uint32_t unsorted_cluster_iter = 0; unsorted_cluster_iter < m_endpoint_clusters.size(); unsorted_cluster_iter++) - { - const uint32_t cluster_iter = sorted_cluster_indices[unsorted_cluster_iter]; - - etc_block blk; - blk.clear(); - blk.set_flip_bit(false); - blk.set_diff_bit(true); - blk.set_inten_tables_etc1s(m_endpoint_cluster_etc_params[cluster_iter].m_inten_table[0]); - blk.set_base5_color(etc_block::pack_color5(m_endpoint_cluster_etc_params[cluster_iter].m_color_unscaled[0], false)); - - color_rgba blk_colors[4]; - blk.get_block_colors(blk_colors, 0); - for (uint32_t i = 0; i < 4; i++) - endpoint_cluster_vis.fill_box(i * 2, 3 * unsorted_cluster_iter, 2, 2, blk_colors[i]); - - for (uint32_t subblock_iter = 0; subblock_iter < m_endpoint_clusters[cluster_iter].size(); subblock_iter++) - { - uint32_t training_vector_index = m_endpoint_clusters[cluster_iter][subblock_iter]; - - const uint32_t block_index = training_vector_index >> 1; - const uint32_t subblock_index = training_vector_index & 1; - - const etc_block& blk2 = m_etc1_blocks_etc1s[block_index]; - - const color_rgba *pBlock_pixels = get_source_pixel_block(block_index).get_ptr(); - - color_rgba subblock_pixels[8]; - - if (vis_endpoint_colors) - { - color_rgba colors[2]; - blk2.get_block_low_high_colors(colors, subblock_index); - for (uint32_t i = 0; i < 8; i++) - subblock_pixels[i] = colors[subblock_index]; - } - else - { - for (uint32_t i = 0; i < 8; i++) - subblock_pixels[i] = pBlock_pixels[g_etc1_pixel_indices[blk2.get_flip_bit()][subblock_index][i]]; - } - - endpoint_cluster_vis.set_block_clipped(subblock_pixels, 12 + 5 * subblock_iter, 3 * unsorted_cluster_iter, 4, 2); - } - } - - save_png(pFilename, endpoint_cluster_vis); - debug_printf("Wrote debug visualization file %s\n", pFilename); - } - - void basisu_frontend::finalize() - { - for (uint32_t block_index = 0; block_index < m_total_blocks; block_index++) - { - for (uint32_t subblock_index = 0; subblock_index < 2; subblock_index++) - { - const uint32_t endpoint_cluster_index = get_subblock_endpoint_cluster_index(block_index, subblock_index); - - m_endpoint_cluster_etc_params[endpoint_cluster_index].m_color_used[0] = true; - } - } - } - - // The backend has remapped the block endpoints while optimizing the output symbols for better rate distortion performance, so let's go and reoptimize the endpoint codebook. - // This is currently the only place where the backend actually goes and changes the quantization and calls the frontend to fix things up. - // This is basically a bottom up clusterization stage, where some leaves can be combined. - void basisu_frontend::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) - { - debug_printf("reoptimize_remapped_endpoints\n"); - - std::vector<uint_vec> new_endpoint_cluster_block_indices(m_endpoint_clusters.size()); - for (uint32_t i = 0; i < new_block_endpoints.size(); i++) - new_endpoint_cluster_block_indices[new_block_endpoints[i]].push_back(i); - - std::vector<uint8_t> cluster_valid(new_endpoint_cluster_block_indices.size()); - std::vector<uint8_t> cluster_improved(new_endpoint_cluster_block_indices.size()); - - const uint32_t N = 256; - for (uint32_t cluster_index_iter = 0; cluster_index_iter < new_endpoint_cluster_block_indices.size(); cluster_index_iter += N) - { - const uint32_t first_index = cluster_index_iter; - const uint32_t last_index = minimum<uint32_t>((uint32_t)new_endpoint_cluster_block_indices.size(), cluster_index_iter + N); - - m_params.m_pJob_pool->add_job( [this, first_index, last_index, &cluster_improved, &cluster_valid, &new_endpoint_cluster_block_indices, &pBlock_selector_indices ] { - for (uint32_t cluster_index = first_index; cluster_index < last_index; cluster_index++) - { - const std::vector<uint32_t>& cluster_block_indices = new_endpoint_cluster_block_indices[cluster_index]; - - if (!cluster_block_indices.size()) - continue; - - const uint32_t total_pixels = (uint32_t)cluster_block_indices.size() * 16; - - std::vector<color_rgba> cluster_pixels(total_pixels); - uint8_vec force_selectors(total_pixels); - - etc_block blk; - blk.set_block_color5_etc1s(get_endpoint_cluster_unscaled_color(cluster_index, false)); - blk.set_inten_tables_etc1s(get_endpoint_cluster_inten_table(cluster_index, false)); - blk.set_flip_bit(true); - - uint64_t cur_err = 0; - - for (uint32_t cluster_block_indices_iter = 0; cluster_block_indices_iter < cluster_block_indices.size(); cluster_block_indices_iter++) - { - const uint32_t block_index = cluster_block_indices[cluster_block_indices_iter]; - - const color_rgba *pBlock_pixels = get_source_pixel_block(block_index).get_ptr(); - - memcpy(&cluster_pixels[cluster_block_indices_iter * 16], pBlock_pixels, 16 * sizeof(color_rgba)); - - const uint32_t selector_cluster_index = pBlock_selector_indices ? (*pBlock_selector_indices)[block_index] : get_block_selector_cluster_index(block_index); - - const etc_block &blk_selectors = get_selector_cluster_selector_bits(selector_cluster_index); - - blk.set_raw_selector_bits(blk_selectors.get_raw_selector_bits()); - - cur_err += blk.evaluate_etc1_error(pBlock_pixels, m_params.m_perceptual); - - for (uint32_t y = 0; y < 4; y++) - for (uint32_t x = 0; x < 4; x++) - force_selectors[cluster_block_indices_iter * 16 + x + y * 4] = static_cast<uint8_t>(blk_selectors.get_selector(x, y)); - } - - endpoint_cluster_etc_params new_endpoint_cluster_etc_params; - - { - etc1_optimizer optimizer; - etc1_solution_coordinates solutions[2]; - - etc1_optimizer::params cluster_optimizer_params; - cluster_optimizer_params.m_num_src_pixels = total_pixels; - cluster_optimizer_params.m_pSrc_pixels = &cluster_pixels[0]; - - cluster_optimizer_params.m_use_color4 = false; - cluster_optimizer_params.m_perceptual = m_params.m_perceptual; - cluster_optimizer_params.m_pForce_selectors = &force_selectors[0]; - - if (m_params.m_compression_level == BASISU_MAX_COMPRESSION_LEVEL) - cluster_optimizer_params.m_quality = cETCQualityUber; - - etc1_optimizer::results cluster_optimizer_results; - - std::vector<uint8_t> cluster_selectors(total_pixels); - cluster_optimizer_results.m_n = total_pixels; - cluster_optimizer_results.m_pSelectors = &cluster_selectors[0]; - - optimizer.init(cluster_optimizer_params, cluster_optimizer_results); - - optimizer.compute(); - - new_endpoint_cluster_etc_params.m_color_unscaled[0] = cluster_optimizer_results.m_block_color_unscaled; - new_endpoint_cluster_etc_params.m_inten_table[0] = cluster_optimizer_results.m_block_inten_table; - new_endpoint_cluster_etc_params.m_color_error[0] = cluster_optimizer_results.m_error; - new_endpoint_cluster_etc_params.m_color_used[0] = true; - new_endpoint_cluster_etc_params.m_valid = true; - } - - if (new_endpoint_cluster_etc_params.m_color_error[0] < cur_err) - { - m_endpoint_cluster_etc_params[cluster_index] = new_endpoint_cluster_etc_params; - - cluster_improved[cluster_index] = true; - } - - cluster_valid[cluster_index] = true; - - } // cluster_index - } ); - - } // cluster_index_iter - - m_params.m_pJob_pool->wait_for_all(); - - uint32_t total_unused_clusters = 0; - uint32_t total_improved_clusters = 0; - - old_to_new_endpoint_cluster_indices.resize(m_endpoint_clusters.size()); - vector_set_all(old_to_new_endpoint_cluster_indices, -1); - - int total_new_endpoint_clusters = 0; - - for (uint32_t old_cluster_index = 0; old_cluster_index < m_endpoint_clusters.size(); old_cluster_index++) - { - if (!cluster_valid[old_cluster_index]) - total_unused_clusters++; - else - old_to_new_endpoint_cluster_indices[old_cluster_index] = total_new_endpoint_clusters++; - - if (cluster_improved[old_cluster_index]) - total_improved_clusters++; - } - - debug_printf("Total unused clusters: %u\n", total_unused_clusters); - debug_printf("Total improved_clusters: %u\n", total_improved_clusters); - debug_printf("Total endpoint clusters: %u\n", total_new_endpoint_clusters); - - if (optimize_final_codebook) - { - cluster_subblock_etc_params_vec new_endpoint_cluster_etc_params(total_new_endpoint_clusters); - - for (uint32_t old_cluster_index = 0; old_cluster_index < m_endpoint_clusters.size(); old_cluster_index++) - { - if (old_to_new_endpoint_cluster_indices[old_cluster_index] >= 0) - new_endpoint_cluster_etc_params[old_to_new_endpoint_cluster_indices[old_cluster_index]] = m_endpoint_cluster_etc_params[old_cluster_index]; - } - - debug_printf("basisu_frontend::reoptimize_remapped_endpoints: stage 1\n"); - - std::vector<uint_vec> new_endpoint_clusters(total_new_endpoint_clusters); - - for (uint32_t block_index = 0; block_index < new_block_endpoints.size(); block_index++) - { - const uint32_t old_endpoint_cluster_index = new_block_endpoints[block_index]; - - const int new_endpoint_cluster_index = old_to_new_endpoint_cluster_indices[old_endpoint_cluster_index]; - BASISU_FRONTEND_VERIFY(new_endpoint_cluster_index >= 0); - - BASISU_FRONTEND_VERIFY(new_endpoint_cluster_index < (int)new_endpoint_clusters.size()); - - new_endpoint_clusters[new_endpoint_cluster_index].push_back(block_index * 2 + 0); - new_endpoint_clusters[new_endpoint_cluster_index].push_back(block_index * 2 + 1); - - BASISU_FRONTEND_VERIFY(new_endpoint_cluster_index < (int)new_endpoint_cluster_etc_params.size()); - - new_endpoint_cluster_etc_params[new_endpoint_cluster_index].m_subblocks.push_back(block_index * 2 + 0); - new_endpoint_cluster_etc_params[new_endpoint_cluster_index].m_subblocks.push_back(block_index * 2 + 1); - - m_block_endpoint_clusters_indices[block_index][0] = new_endpoint_cluster_index; - m_block_endpoint_clusters_indices[block_index][1] = new_endpoint_cluster_index; - } - - debug_printf("basisu_frontend::reoptimize_remapped_endpoints: stage 2\n"); - - m_endpoint_clusters = new_endpoint_clusters; - m_endpoint_cluster_etc_params = new_endpoint_cluster_etc_params; - - eliminate_redundant_or_empty_endpoint_clusters(); - - debug_printf("basisu_frontend::reoptimize_remapped_endpoints: stage 3\n"); - - for (uint32_t new_cluster_index = 0; new_cluster_index < m_endpoint_clusters.size(); new_cluster_index++) - { - for (uint32_t cluster_block_iter = 0; cluster_block_iter < m_endpoint_clusters[new_cluster_index].size(); cluster_block_iter++) - { - const uint32_t subblock_index = m_endpoint_clusters[new_cluster_index][cluster_block_iter]; - const uint32_t block_index = subblock_index >> 1; - - m_block_endpoint_clusters_indices[block_index][0] = new_cluster_index; - m_block_endpoint_clusters_indices[block_index][1] = new_cluster_index; - - const uint32_t old_cluster_index = new_block_endpoints[block_index]; - - old_to_new_endpoint_cluster_indices[old_cluster_index] = new_cluster_index; - } - } - - debug_printf("basisu_frontend::reoptimize_remapped_endpoints: stage 4\n"); - - for (uint32_t block_index = 0; block_index < m_encoded_blocks.size(); block_index++) - { - const uint32_t endpoint_cluster_index = get_subblock_endpoint_cluster_index(block_index, 0); - - m_encoded_blocks[block_index].set_block_color5_etc1s(get_endpoint_cluster_unscaled_color(endpoint_cluster_index, false)); - m_encoded_blocks[block_index].set_inten_tables_etc1s(get_endpoint_cluster_inten_table(endpoint_cluster_index, false)); - } - - debug_printf("Final (post-RDO) endpoint clusters: %u\n", m_endpoint_clusters.size()); - } - - //debug_printf("validate_output: %u\n", validate_output()); - } - - bool basisu_frontend::validate_output() const - { - debug_printf("validate_output\n"); - - if (!check_etc1s_constraints()) - return false; - - for (uint32_t block_index = 0; block_index < m_total_blocks; block_index++) - { -//#define CHECK(x) do { if (!(x)) { DebugBreak(); return false; } } while(0) -#define CHECK(x) BASISU_FRONTEND_VERIFY(x); - - CHECK(get_output_block(block_index).get_flip_bit() == true); - - const bool diff_flag = get_diff_flag(block_index); - CHECK(diff_flag == true); - - etc_block blk; - memset(&blk, 0, sizeof(blk)); - blk.set_flip_bit(true); - blk.set_diff_bit(true); - - const uint32_t endpoint_cluster0_index = get_subblock_endpoint_cluster_index(block_index, 0); - const uint32_t endpoint_cluster1_index = get_subblock_endpoint_cluster_index(block_index, 1); - - // basisu only supports ETC1S, so these must be equal. - CHECK(endpoint_cluster0_index == endpoint_cluster1_index); - - CHECK(blk.set_block_color5_check(get_endpoint_cluster_unscaled_color(endpoint_cluster0_index, false), get_endpoint_cluster_unscaled_color(endpoint_cluster1_index, false))); - - CHECK(get_endpoint_cluster_color_is_used(endpoint_cluster0_index, false)); - - blk.set_inten_table(0, get_endpoint_cluster_inten_table(endpoint_cluster0_index, false)); - blk.set_inten_table(1, get_endpoint_cluster_inten_table(endpoint_cluster1_index, false)); - - const uint32_t selector_cluster_index = get_block_selector_cluster_index(block_index); - CHECK(selector_cluster_index < get_total_selector_clusters()); - - CHECK(vector_find(get_selector_cluster_block_indices(selector_cluster_index), block_index) != -1); - - blk.set_raw_selector_bits(get_selector_cluster_selector_bits(selector_cluster_index).get_raw_selector_bits()); - - const etc_block &rdo_output_block = get_output_block(block_index); - - CHECK(rdo_output_block.get_flip_bit() == blk.get_flip_bit()); - CHECK(rdo_output_block.get_diff_bit() == blk.get_diff_bit()); - CHECK(rdo_output_block.get_inten_table(0) == blk.get_inten_table(0)); - CHECK(rdo_output_block.get_inten_table(1) == blk.get_inten_table(1)); - CHECK(rdo_output_block.get_base5_color() == blk.get_base5_color()); - CHECK(rdo_output_block.get_delta3_color() == blk.get_delta3_color()); - CHECK(rdo_output_block.get_raw_selector_bits() == blk.get_raw_selector_bits()); - - if (m_params.m_pGlobal_sel_codebook) - { - bool used_global_cb = true; - if (m_params.m_use_hybrid_selector_codebooks) - used_global_cb = m_selector_cluster_uses_global_cb[selector_cluster_index]; - - if (used_global_cb) - { - basist::etc1_global_selector_codebook_entry_id pal_id(get_selector_cluster_global_selector_entry_ids()[selector_cluster_index]); - - basist::etc1_selector_palette_entry pal_entry(m_params.m_pGlobal_sel_codebook->get_entry(pal_id)); - - for (uint32_t y = 0; y < 4; y++) - { - for (uint32_t x = 0; x < 4; x++) - { - CHECK(pal_entry(x, y) == blk.get_selector(x, y)); - } - } - } - } - -#undef CHECK - } - - return true; - } - - void basisu_frontend::dump_debug_image(const char *pFilename, uint32_t first_block, uint32_t num_blocks_x, uint32_t num_blocks_y, bool output_blocks) - { - gpu_image g; - g.init(texture_format::cETC1, num_blocks_x * 4, num_blocks_y * 4); - - for (uint32_t y = 0; y < num_blocks_y; y++) - { - for (uint32_t x = 0; x < num_blocks_x; x++) - { - const uint32_t block_index = first_block + x + y * num_blocks_x; - - etc_block &blk = *(etc_block *)g.get_block_ptr(x, y); - - if (output_blocks) - blk = get_output_block(block_index); - else - { - const bool diff_flag = get_diff_flag(block_index); - - blk.set_diff_bit(diff_flag); - blk.set_flip_bit(true); - - const uint32_t endpoint_cluster0_index = get_subblock_endpoint_cluster_index(block_index, 0); - const uint32_t endpoint_cluster1_index = get_subblock_endpoint_cluster_index(block_index, 1); - - if (diff_flag) - blk.set_block_color5(get_endpoint_cluster_unscaled_color(endpoint_cluster0_index, false), get_endpoint_cluster_unscaled_color(endpoint_cluster1_index, false)); - else - blk.set_block_color4(get_endpoint_cluster_unscaled_color(endpoint_cluster0_index, true), get_endpoint_cluster_unscaled_color(endpoint_cluster1_index, true)); - - blk.set_inten_table(0, get_endpoint_cluster_inten_table(endpoint_cluster0_index, !diff_flag)); - blk.set_inten_table(1, get_endpoint_cluster_inten_table(endpoint_cluster1_index, !diff_flag)); - - const uint32_t selector_cluster_index = get_block_selector_cluster_index(block_index); - blk.set_raw_selector_bits(get_selector_cluster_selector_bits(selector_cluster_index).get_raw_selector_bits()); - } - } - } - - image img; - g.unpack(img); - - save_png(pFilename, img); - } - -} // namespace basisu - |