| // Copyright 2026 The Wuffs Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // https://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| // |
| // SPDX-License-Identifier: Apache-2.0 OR MIT |
| |
| // ---------------- |
| |
| // This is a small, self-contained, single-file C library to decode basic |
| // Handsum image files. Basic means that it only supports Handsum's default |
| // configuration, c3q4: color=3 (RGB, no Alpha) and quality=4 (best). |
| // |
| // It is a C port of some of the github.com/google/wuffs/lib/handsum library. |
| // Decoding only, no encoding, and c3q4 only. |
| // |
| // To decode other configurations, like c1q1 (Gray, worst quality) or c4q2 |
| // (RGBA, medium-low quality), use the github.com/google/wuffs Go or |
| // C-transpiled-from-memory-safe-Wuffs implementations. |
| // |
| // To use this file as a "foo.c"-like implementation, instead of a "foo.h"-like |
| // header, #define BASIC_HANDSUM_DECODE_IMPLEMENTATION before #include'ing or |
| // compiling it. |
| // |
| // As an option, you may also #define |
| // BASIC_HANDSUM_DECODE_CONFIG__STATIC_FUNCTIONS to make these functions have |
| // static storage. This can help the compiler ignore or discard unused code, |
| // which can produce faster compiles and smaller binaries. |
| |
| #ifndef BASIC_HANDSUM_DECODE_INCLUDE_GUARD |
| #define BASIC_HANDSUM_DECODE_INCLUDE_GUARD |
| |
| #if defined(BASIC_HANDSUM_DECODE_CONFIG__STATIC_FUNCTIONS) |
| #define BASIC_HANDSUM_DECODE__MAYBE_STATIC static |
| #else |
| #define BASIC_HANDSUM_DECODE__MAYBE_STATIC |
| #endif |
| |
| #include <stdbool.h> |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| typedef struct basic_handsum_decode__pixel_buffer_type { |
| uint32_t width; // Measured in pixels, not bytes. |
| uint32_t height; // Measured in pixels, not bytes. |
| uint8_t bgra_pixels[1024]; |
| } basic_handsum_decode__pixel_buffer; |
| |
| // BASIC_HANDSUM_DECODE__RESULT__ETC can be returned by |
| // basic_handsum_decode__decode. Zero means OK. Non-zero means an error. |
| #define BASIC_HANDSUM_DECODE__RESULT__OK 0 |
| #define BASIC_HANDSUM_DECODE__RESULT__DST_IS_NULL 1 |
| #define BASIC_HANDSUM_DECODE__RESULT__SRC_IS_TOO_SHORT 2 |
| #define BASIC_HANDSUM_DECODE__RESULT__SRC_IS_NOT_HANDSUM_C3Q4 3 |
| |
| // Decodes the source bytes into the destination pixel buffer, producing 4 |
| // bytes per pixel (in B, G, R, A order). The bgra_pixels' row stride will be |
| // (4 * width) bytes. |
| // |
| // It only supports c3q4 Handsum files: color=3 (so alpha is always 0xFF) and |
| // quality=4 (best). Every valid c3q4 Handsum file is exactly 147 bytes long. |
| // |
| // On success, it returns zero and dst's width and height will range between 1 |
| // and 16, inclusive. |
| // |
| // On failure, it returns non-zero and, if dst is non-NULL, its width and |
| // height will be set to zero. |
| // |
| // This function is thread-safe. |
| BASIC_HANDSUM_DECODE__MAYBE_STATIC int // |
| basic_handsum_decode__decode(basic_handsum_decode__pixel_buffer* dst, |
| const uint8_t* src_ptr, |
| const size_t src_len); |
| |
| // -------- |
| |
| #ifdef BASIC_HANDSUM_DECODE_IMPLEMENTATION |
| |
| static void // |
| basic_handsum_decode__smooth_block_seams_16x16(uint8_t* b) { |
| static const uint8_t smoothing_pairs_16x16[28][2] = { |
| {0x07, 0x08}, {0x17, 0x18}, {0x27, 0x28}, {0x37, 0x38}, |
| {0x47, 0x48}, {0x57, 0x58}, {0x67, 0x68}, |
| |
| {0x70, 0x80}, {0x71, 0x81}, {0x72, 0x82}, {0x73, 0x83}, |
| {0x74, 0x84}, {0x75, 0x85}, {0x76, 0x86}, |
| |
| {0x79, 0x89}, {0x7A, 0x8A}, {0x7B, 0x8B}, {0x7C, 0x8C}, |
| {0x7D, 0x8D}, {0x7E, 0x8E}, {0x7F, 0x8F}, |
| |
| {0x97, 0x98}, {0xA7, 0xA8}, {0xB7, 0xB8}, {0xC7, 0xC8}, |
| {0xD7, 0xD8}, {0xE7, 0xE8}, {0xF7, 0xF8}, |
| }; |
| |
| for (int i = 0; i < 28; i++) { |
| uint8_t p0 = smoothing_pairs_16x16[i][0]; |
| uint8_t p1 = smoothing_pairs_16x16[i][1]; |
| uint32_t v0 = b[p0]; |
| uint32_t v1 = b[p1]; |
| b[p0] = ((3 * v0) + v1 + 2) / 4; |
| b[p1] = ((3 * v1) + v0 + 2) / 4; |
| } |
| |
| uint32_t v77 = b[0x77]; |
| uint32_t v78 = b[0x78]; |
| uint32_t v88 = b[0x88]; |
| uint32_t v87 = b[0x87]; |
| |
| b[0x77] = ((9 * v77) + (3 * v78) + v88 + (3 * v87) + 8) / 16; |
| b[0x78] = ((9 * v78) + (3 * v88) + v87 + (3 * v77) + 8) / 16; |
| b[0x88] = ((9 * v88) + (3 * v87) + v77 + (3 * v78) + 8) / 16; |
| b[0x87] = ((9 * v87) + (3 * v77) + v78 + (3 * v88) + 8) / 16; |
| } |
| |
| static void // |
| basic_handsum_decode__smooth_block_seams_8x8_q4(uint8_t* b) { |
| for (int y = 1; y < 7; y += 2) { |
| for (int x = 1; x < 7; x += 2) { |
| int o = (y * 8) + x; |
| |
| uint32_t v0 = b[o + 0]; |
| uint32_t v1 = b[o + 1]; |
| uint32_t v9 = b[o + 9]; |
| uint32_t v8 = b[o + 8]; |
| |
| b[o + 0] = ((9 * v0) + (3 * v1) + v9 + (3 * v8) + 8) / 16; |
| b[o + 1] = ((9 * v1) + (3 * v9) + v8 + (3 * v0) + 8) / 16; |
| b[o + 9] = ((9 * v9) + (3 * v8) + v0 + (3 * v1) + 8) / 16; |
| b[o + 8] = ((9 * v8) + (3 * v0) + v1 + (3 * v9) + 8) / 16; |
| } |
| |
| { |
| uint32_t v0 = b[000 + y]; |
| uint32_t v1 = b[001 + y]; |
| b[000 + y] = ((3 * v0) + v1 + 2) / 4; |
| b[001 + y] = ((3 * v1) + v0 + 2) / 4; |
| } |
| |
| { |
| uint32_t v0 = b[070 + y]; |
| uint32_t v1 = b[071 + y]; |
| b[070 + y] = ((3 * v0) + v1 + 2) / 4; |
| b[071 + y] = ((3 * v1) + v0 + 2) / 4; |
| } |
| |
| int y8 = y * 8; |
| |
| { |
| uint32_t v0 = b[000 + y8]; |
| uint32_t v1 = b[010 + y8]; |
| b[000 + y8] = ((3 * v0) + v1 + 2) / 4; |
| b[010 + y8] = ((3 * v1) + v0 + 2) / 4; |
| } |
| |
| { |
| uint32_t v0 = b[007 + y8]; |
| uint32_t v1 = b[017 + y8]; |
| b[007 + y8] = ((3 * v0) + v1 + 2) / 4; |
| b[017 + y8] = ((3 * v1) + v0 + 2) / 4; |
| } |
| } |
| } |
| |
| static int // |
| basic_handsum_decode__decode_block_q4(uint8_t* dst_ptr, |
| size_t dst_stride, |
| const uint8_t* src_ptr, |
| size_t bit_offset) { |
| static const uint8_t bias_and_clamp[1024] = { |
| 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, |
| 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, |
| 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, 0xA3, |
| 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, |
| 0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, |
| 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, |
| 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, |
| 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, |
| 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, |
| 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, |
| 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, |
| |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| |
| 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, |
| 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, |
| 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, |
| 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, |
| 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, |
| 0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, |
| 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, |
| 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, |
| 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, |
| 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, |
| 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, |
| }; |
| |
| uint8_t tmp[64]; |
| for (int i = 0; i < 16; i++) { |
| int nibble0 = (src_ptr[bit_offset >> 3] >> (bit_offset & 4)) & 15; |
| int dct0 = (nibble0 * 0x22) - 256; |
| bit_offset += 4; |
| |
| int nibble1 = (src_ptr[bit_offset >> 3] >> (bit_offset & 4)) & 15; |
| int dct1 = (nibble1 * 0x10) - 128; |
| bit_offset += 4; |
| |
| int nibble2 = (src_ptr[bit_offset >> 3] >> (bit_offset & 4)) & 15; |
| int dct2 = (nibble2 * 0x10) - 128; |
| bit_offset += 4; |
| |
| int x2 = 2 * (i & 3); |
| int y2 = 2 * (i >> 2); |
| int o2 = (y2 * 8) + x2; |
| |
| tmp[o2 + 0] = bias_and_clamp[((+dct0 + dct1 + dct2 + 1) >> 1) & 1023]; |
| tmp[o2 + 1] = bias_and_clamp[((+dct0 - dct1 + dct2 + 1) >> 1) & 1023]; |
| tmp[o2 + 8] = bias_and_clamp[((+dct0 + dct1 - dct2 + 1) >> 1) & 1023]; |
| tmp[o2 + 9] = bias_and_clamp[((+dct0 - dct1 - dct2 + 1) >> 1) & 1023]; |
| } |
| |
| basic_handsum_decode__smooth_block_seams_8x8_q4(&tmp[0]); |
| |
| for (size_t i = 0; i < 8; i++) { |
| size_t di = i * dst_stride; |
| size_t ti = i * 8; |
| memcpy(&dst_ptr[di], &tmp[ti], 8); |
| } |
| |
| return bit_offset; |
| } |
| |
| static void // |
| basic_handsum_decode__scale_and_bias_chroma_down(uint8_t* b) { |
| for (int i = 0; i < 64; i++) { |
| b[i] = (b[i] >> 1) + 0x3C; |
| } |
| } |
| |
| static void // |
| basic_handsum_decode__upsample_from(uint8_t* restrict dst, |
| const uint8_t* restrict src) { |
| // clang-format off |
| |
| dst[0x00] = src[0x00]; |
| dst[0x01] = ((3 * (int)(src[0x00])) + (int)(src[0x01]) + 2) / 4; |
| dst[0x02] = ((3 * (int)(src[0x01])) + (int)(src[0x00]) + 2) / 4; |
| dst[0x03] = ((3 * (int)(src[0x01])) + (int)(src[0x02]) + 2) / 4; |
| dst[0x04] = ((3 * (int)(src[0x02])) + (int)(src[0x01]) + 2) / 4; |
| dst[0x05] = ((3 * (int)(src[0x02])) + (int)(src[0x03]) + 2) / 4; |
| dst[0x06] = ((3 * (int)(src[0x03])) + (int)(src[0x02]) + 2) / 4; |
| dst[0x07] = ((3 * (int)(src[0x03])) + (int)(src[0x04]) + 2) / 4; |
| dst[0x08] = ((3 * (int)(src[0x04])) + (int)(src[0x03]) + 2) / 4; |
| dst[0x09] = ((3 * (int)(src[0x04])) + (int)(src[0x05]) + 2) / 4; |
| dst[0x0A] = ((3 * (int)(src[0x05])) + (int)(src[0x04]) + 2) / 4; |
| dst[0x0B] = ((3 * (int)(src[0x05])) + (int)(src[0x06]) + 2) / 4; |
| dst[0x0C] = ((3 * (int)(src[0x06])) + (int)(src[0x05]) + 2) / 4; |
| dst[0x0D] = ((3 * (int)(src[0x06])) + (int)(src[0x07]) + 2) / 4; |
| dst[0x0E] = ((3 * (int)(src[0x07])) + (int)(src[0x06]) + 2) / 4; |
| dst[0x0F] = src[0x07]; |
| dst[0x10] = ((3 * (int)(src[0x00])) + (int)(src[0x08]) + 2) / 4; |
| dst[0x11] = ((9 * (int)(src[0x00])) + (3 * (int)(src[0x01])) + (3 * (int)(src[0x08])) + (int)(src[0x09]) + 8) / 16; |
| dst[0x12] = ((9 * (int)(src[0x01])) + (3 * (int)(src[0x00])) + (3 * (int)(src[0x09])) + (int)(src[0x08]) + 8) / 16; |
| dst[0x13] = ((9 * (int)(src[0x01])) + (3 * (int)(src[0x02])) + (3 * (int)(src[0x09])) + (int)(src[0x0A]) + 8) / 16; |
| dst[0x14] = ((9 * (int)(src[0x02])) + (3 * (int)(src[0x01])) + (3 * (int)(src[0x0A])) + (int)(src[0x09]) + 8) / 16; |
| dst[0x15] = ((9 * (int)(src[0x02])) + (3 * (int)(src[0x03])) + (3 * (int)(src[0x0A])) + (int)(src[0x0B]) + 8) / 16; |
| dst[0x16] = ((9 * (int)(src[0x03])) + (3 * (int)(src[0x02])) + (3 * (int)(src[0x0B])) + (int)(src[0x0A]) + 8) / 16; |
| dst[0x17] = ((9 * (int)(src[0x03])) + (3 * (int)(src[0x04])) + (3 * (int)(src[0x0B])) + (int)(src[0x0C]) + 8) / 16; |
| dst[0x18] = ((9 * (int)(src[0x04])) + (3 * (int)(src[0x03])) + (3 * (int)(src[0x0C])) + (int)(src[0x0B]) + 8) / 16; |
| dst[0x19] = ((9 * (int)(src[0x04])) + (3 * (int)(src[0x05])) + (3 * (int)(src[0x0C])) + (int)(src[0x0D]) + 8) / 16; |
| dst[0x1A] = ((9 * (int)(src[0x05])) + (3 * (int)(src[0x04])) + (3 * (int)(src[0x0D])) + (int)(src[0x0C]) + 8) / 16; |
| dst[0x1B] = ((9 * (int)(src[0x05])) + (3 * (int)(src[0x06])) + (3 * (int)(src[0x0D])) + (int)(src[0x0E]) + 8) / 16; |
| dst[0x1C] = ((9 * (int)(src[0x06])) + (3 * (int)(src[0x05])) + (3 * (int)(src[0x0E])) + (int)(src[0x0D]) + 8) / 16; |
| dst[0x1D] = ((9 * (int)(src[0x06])) + (3 * (int)(src[0x07])) + (3 * (int)(src[0x0E])) + (int)(src[0x0F]) + 8) / 16; |
| dst[0x1E] = ((9 * (int)(src[0x07])) + (3 * (int)(src[0x06])) + (3 * (int)(src[0x0F])) + (int)(src[0x0E]) + 8) / 16; |
| dst[0x1F] = ((3 * (int)(src[0x07])) + (int)(src[0x0F]) + 2) / 4; |
| dst[0x20] = ((3 * (int)(src[0x08])) + (int)(src[0x00]) + 2) / 4; |
| dst[0x21] = ((9 * (int)(src[0x08])) + (3 * (int)(src[0x09])) + (3 * (int)(src[0x00])) + (int)(src[0x01]) + 8) / 16; |
| dst[0x22] = ((9 * (int)(src[0x09])) + (3 * (int)(src[0x08])) + (3 * (int)(src[0x01])) + (int)(src[0x00]) + 8) / 16; |
| dst[0x23] = ((9 * (int)(src[0x09])) + (3 * (int)(src[0x0A])) + (3 * (int)(src[0x01])) + (int)(src[0x02]) + 8) / 16; |
| dst[0x24] = ((9 * (int)(src[0x0A])) + (3 * (int)(src[0x09])) + (3 * (int)(src[0x02])) + (int)(src[0x01]) + 8) / 16; |
| dst[0x25] = ((9 * (int)(src[0x0A])) + (3 * (int)(src[0x0B])) + (3 * (int)(src[0x02])) + (int)(src[0x03]) + 8) / 16; |
| dst[0x26] = ((9 * (int)(src[0x0B])) + (3 * (int)(src[0x0A])) + (3 * (int)(src[0x03])) + (int)(src[0x02]) + 8) / 16; |
| dst[0x27] = ((9 * (int)(src[0x0B])) + (3 * (int)(src[0x0C])) + (3 * (int)(src[0x03])) + (int)(src[0x04]) + 8) / 16; |
| dst[0x28] = ((9 * (int)(src[0x0C])) + (3 * (int)(src[0x0B])) + (3 * (int)(src[0x04])) + (int)(src[0x03]) + 8) / 16; |
| dst[0x29] = ((9 * (int)(src[0x0C])) + (3 * (int)(src[0x0D])) + (3 * (int)(src[0x04])) + (int)(src[0x05]) + 8) / 16; |
| dst[0x2A] = ((9 * (int)(src[0x0D])) + (3 * (int)(src[0x0C])) + (3 * (int)(src[0x05])) + (int)(src[0x04]) + 8) / 16; |
| dst[0x2B] = ((9 * (int)(src[0x0D])) + (3 * (int)(src[0x0E])) + (3 * (int)(src[0x05])) + (int)(src[0x06]) + 8) / 16; |
| dst[0x2C] = ((9 * (int)(src[0x0E])) + (3 * (int)(src[0x0D])) + (3 * (int)(src[0x06])) + (int)(src[0x05]) + 8) / 16; |
| dst[0x2D] = ((9 * (int)(src[0x0E])) + (3 * (int)(src[0x0F])) + (3 * (int)(src[0x06])) + (int)(src[0x07]) + 8) / 16; |
| dst[0x2E] = ((9 * (int)(src[0x0F])) + (3 * (int)(src[0x0E])) + (3 * (int)(src[0x07])) + (int)(src[0x06]) + 8) / 16; |
| dst[0x2F] = ((3 * (int)(src[0x0F])) + (int)(src[0x07]) + 2) / 4; |
| dst[0x30] = ((3 * (int)(src[0x08])) + (int)(src[0x10]) + 2) / 4; |
| dst[0x31] = ((9 * (int)(src[0x08])) + (3 * (int)(src[0x09])) + (3 * (int)(src[0x10])) + (int)(src[0x11]) + 8) / 16; |
| dst[0x32] = ((9 * (int)(src[0x09])) + (3 * (int)(src[0x08])) + (3 * (int)(src[0x11])) + (int)(src[0x10]) + 8) / 16; |
| dst[0x33] = ((9 * (int)(src[0x09])) + (3 * (int)(src[0x0A])) + (3 * (int)(src[0x11])) + (int)(src[0x12]) + 8) / 16; |
| dst[0x34] = ((9 * (int)(src[0x0A])) + (3 * (int)(src[0x09])) + (3 * (int)(src[0x12])) + (int)(src[0x11]) + 8) / 16; |
| dst[0x35] = ((9 * (int)(src[0x0A])) + (3 * (int)(src[0x0B])) + (3 * (int)(src[0x12])) + (int)(src[0x13]) + 8) / 16; |
| dst[0x36] = ((9 * (int)(src[0x0B])) + (3 * (int)(src[0x0A])) + (3 * (int)(src[0x13])) + (int)(src[0x12]) + 8) / 16; |
| dst[0x37] = ((9 * (int)(src[0x0B])) + (3 * (int)(src[0x0C])) + (3 * (int)(src[0x13])) + (int)(src[0x14]) + 8) / 16; |
| dst[0x38] = ((9 * (int)(src[0x0C])) + (3 * (int)(src[0x0B])) + (3 * (int)(src[0x14])) + (int)(src[0x13]) + 8) / 16; |
| dst[0x39] = ((9 * (int)(src[0x0C])) + (3 * (int)(src[0x0D])) + (3 * (int)(src[0x14])) + (int)(src[0x15]) + 8) / 16; |
| dst[0x3A] = ((9 * (int)(src[0x0D])) + (3 * (int)(src[0x0C])) + (3 * (int)(src[0x15])) + (int)(src[0x14]) + 8) / 16; |
| dst[0x3B] = ((9 * (int)(src[0x0D])) + (3 * (int)(src[0x0E])) + (3 * (int)(src[0x15])) + (int)(src[0x16]) + 8) / 16; |
| dst[0x3C] = ((9 * (int)(src[0x0E])) + (3 * (int)(src[0x0D])) + (3 * (int)(src[0x16])) + (int)(src[0x15]) + 8) / 16; |
| dst[0x3D] = ((9 * (int)(src[0x0E])) + (3 * (int)(src[0x0F])) + (3 * (int)(src[0x16])) + (int)(src[0x17]) + 8) / 16; |
| dst[0x3E] = ((9 * (int)(src[0x0F])) + (3 * (int)(src[0x0E])) + (3 * (int)(src[0x17])) + (int)(src[0x16]) + 8) / 16; |
| dst[0x3F] = ((3 * (int)(src[0x0F])) + (int)(src[0x17]) + 2) / 4; |
| dst[0x40] = ((3 * (int)(src[0x10])) + (int)(src[0x08]) + 2) / 4; |
| dst[0x41] = ((9 * (int)(src[0x10])) + (3 * (int)(src[0x11])) + (3 * (int)(src[0x08])) + (int)(src[0x09]) + 8) / 16; |
| dst[0x42] = ((9 * (int)(src[0x11])) + (3 * (int)(src[0x10])) + (3 * (int)(src[0x09])) + (int)(src[0x08]) + 8) / 16; |
| dst[0x43] = ((9 * (int)(src[0x11])) + (3 * (int)(src[0x12])) + (3 * (int)(src[0x09])) + (int)(src[0x0A]) + 8) / 16; |
| dst[0x44] = ((9 * (int)(src[0x12])) + (3 * (int)(src[0x11])) + (3 * (int)(src[0x0A])) + (int)(src[0x09]) + 8) / 16; |
| dst[0x45] = ((9 * (int)(src[0x12])) + (3 * (int)(src[0x13])) + (3 * (int)(src[0x0A])) + (int)(src[0x0B]) + 8) / 16; |
| dst[0x46] = ((9 * (int)(src[0x13])) + (3 * (int)(src[0x12])) + (3 * (int)(src[0x0B])) + (int)(src[0x0A]) + 8) / 16; |
| dst[0x47] = ((9 * (int)(src[0x13])) + (3 * (int)(src[0x14])) + (3 * (int)(src[0x0B])) + (int)(src[0x0C]) + 8) / 16; |
| dst[0x48] = ((9 * (int)(src[0x14])) + (3 * (int)(src[0x13])) + (3 * (int)(src[0x0C])) + (int)(src[0x0B]) + 8) / 16; |
| dst[0x49] = ((9 * (int)(src[0x14])) + (3 * (int)(src[0x15])) + (3 * (int)(src[0x0C])) + (int)(src[0x0D]) + 8) / 16; |
| dst[0x4A] = ((9 * (int)(src[0x15])) + (3 * (int)(src[0x14])) + (3 * (int)(src[0x0D])) + (int)(src[0x0C]) + 8) / 16; |
| dst[0x4B] = ((9 * (int)(src[0x15])) + (3 * (int)(src[0x16])) + (3 * (int)(src[0x0D])) + (int)(src[0x0E]) + 8) / 16; |
| dst[0x4C] = ((9 * (int)(src[0x16])) + (3 * (int)(src[0x15])) + (3 * (int)(src[0x0E])) + (int)(src[0x0D]) + 8) / 16; |
| dst[0x4D] = ((9 * (int)(src[0x16])) + (3 * (int)(src[0x17])) + (3 * (int)(src[0x0E])) + (int)(src[0x0F]) + 8) / 16; |
| dst[0x4E] = ((9 * (int)(src[0x17])) + (3 * (int)(src[0x16])) + (3 * (int)(src[0x0F])) + (int)(src[0x0E]) + 8) / 16; |
| dst[0x4F] = ((3 * (int)(src[0x17])) + (int)(src[0x0F]) + 2) / 4; |
| dst[0x50] = ((3 * (int)(src[0x10])) + (int)(src[0x18]) + 2) / 4; |
| dst[0x51] = ((9 * (int)(src[0x10])) + (3 * (int)(src[0x11])) + (3 * (int)(src[0x18])) + (int)(src[0x19]) + 8) / 16; |
| dst[0x52] = ((9 * (int)(src[0x11])) + (3 * (int)(src[0x10])) + (3 * (int)(src[0x19])) + (int)(src[0x18]) + 8) / 16; |
| dst[0x53] = ((9 * (int)(src[0x11])) + (3 * (int)(src[0x12])) + (3 * (int)(src[0x19])) + (int)(src[0x1A]) + 8) / 16; |
| dst[0x54] = ((9 * (int)(src[0x12])) + (3 * (int)(src[0x11])) + (3 * (int)(src[0x1A])) + (int)(src[0x19]) + 8) / 16; |
| dst[0x55] = ((9 * (int)(src[0x12])) + (3 * (int)(src[0x13])) + (3 * (int)(src[0x1A])) + (int)(src[0x1B]) + 8) / 16; |
| dst[0x56] = ((9 * (int)(src[0x13])) + (3 * (int)(src[0x12])) + (3 * (int)(src[0x1B])) + (int)(src[0x1A]) + 8) / 16; |
| dst[0x57] = ((9 * (int)(src[0x13])) + (3 * (int)(src[0x14])) + (3 * (int)(src[0x1B])) + (int)(src[0x1C]) + 8) / 16; |
| dst[0x58] = ((9 * (int)(src[0x14])) + (3 * (int)(src[0x13])) + (3 * (int)(src[0x1C])) + (int)(src[0x1B]) + 8) / 16; |
| dst[0x59] = ((9 * (int)(src[0x14])) + (3 * (int)(src[0x15])) + (3 * (int)(src[0x1C])) + (int)(src[0x1D]) + 8) / 16; |
| dst[0x5A] = ((9 * (int)(src[0x15])) + (3 * (int)(src[0x14])) + (3 * (int)(src[0x1D])) + (int)(src[0x1C]) + 8) / 16; |
| dst[0x5B] = ((9 * (int)(src[0x15])) + (3 * (int)(src[0x16])) + (3 * (int)(src[0x1D])) + (int)(src[0x1E]) + 8) / 16; |
| dst[0x5C] = ((9 * (int)(src[0x16])) + (3 * (int)(src[0x15])) + (3 * (int)(src[0x1E])) + (int)(src[0x1D]) + 8) / 16; |
| dst[0x5D] = ((9 * (int)(src[0x16])) + (3 * (int)(src[0x17])) + (3 * (int)(src[0x1E])) + (int)(src[0x1F]) + 8) / 16; |
| dst[0x5E] = ((9 * (int)(src[0x17])) + (3 * (int)(src[0x16])) + (3 * (int)(src[0x1F])) + (int)(src[0x1E]) + 8) / 16; |
| dst[0x5F] = ((3 * (int)(src[0x17])) + (int)(src[0x1F]) + 2) / 4; |
| dst[0x60] = ((3 * (int)(src[0x18])) + (int)(src[0x10]) + 2) / 4; |
| dst[0x61] = ((9 * (int)(src[0x18])) + (3 * (int)(src[0x19])) + (3 * (int)(src[0x10])) + (int)(src[0x11]) + 8) / 16; |
| dst[0x62] = ((9 * (int)(src[0x19])) + (3 * (int)(src[0x18])) + (3 * (int)(src[0x11])) + (int)(src[0x10]) + 8) / 16; |
| dst[0x63] = ((9 * (int)(src[0x19])) + (3 * (int)(src[0x1A])) + (3 * (int)(src[0x11])) + (int)(src[0x12]) + 8) / 16; |
| dst[0x64] = ((9 * (int)(src[0x1A])) + (3 * (int)(src[0x19])) + (3 * (int)(src[0x12])) + (int)(src[0x11]) + 8) / 16; |
| dst[0x65] = ((9 * (int)(src[0x1A])) + (3 * (int)(src[0x1B])) + (3 * (int)(src[0x12])) + (int)(src[0x13]) + 8) / 16; |
| dst[0x66] = ((9 * (int)(src[0x1B])) + (3 * (int)(src[0x1A])) + (3 * (int)(src[0x13])) + (int)(src[0x12]) + 8) / 16; |
| dst[0x67] = ((9 * (int)(src[0x1B])) + (3 * (int)(src[0x1C])) + (3 * (int)(src[0x13])) + (int)(src[0x14]) + 8) / 16; |
| dst[0x68] = ((9 * (int)(src[0x1C])) + (3 * (int)(src[0x1B])) + (3 * (int)(src[0x14])) + (int)(src[0x13]) + 8) / 16; |
| dst[0x69] = ((9 * (int)(src[0x1C])) + (3 * (int)(src[0x1D])) + (3 * (int)(src[0x14])) + (int)(src[0x15]) + 8) / 16; |
| dst[0x6A] = ((9 * (int)(src[0x1D])) + (3 * (int)(src[0x1C])) + (3 * (int)(src[0x15])) + (int)(src[0x14]) + 8) / 16; |
| dst[0x6B] = ((9 * (int)(src[0x1D])) + (3 * (int)(src[0x1E])) + (3 * (int)(src[0x15])) + (int)(src[0x16]) + 8) / 16; |
| dst[0x6C] = ((9 * (int)(src[0x1E])) + (3 * (int)(src[0x1D])) + (3 * (int)(src[0x16])) + (int)(src[0x15]) + 8) / 16; |
| dst[0x6D] = ((9 * (int)(src[0x1E])) + (3 * (int)(src[0x1F])) + (3 * (int)(src[0x16])) + (int)(src[0x17]) + 8) / 16; |
| dst[0x6E] = ((9 * (int)(src[0x1F])) + (3 * (int)(src[0x1E])) + (3 * (int)(src[0x17])) + (int)(src[0x16]) + 8) / 16; |
| dst[0x6F] = ((3 * (int)(src[0x1F])) + (int)(src[0x17]) + 2) / 4; |
| dst[0x70] = ((3 * (int)(src[0x18])) + (int)(src[0x20]) + 2) / 4; |
| dst[0x71] = ((9 * (int)(src[0x18])) + (3 * (int)(src[0x19])) + (3 * (int)(src[0x20])) + (int)(src[0x21]) + 8) / 16; |
| dst[0x72] = ((9 * (int)(src[0x19])) + (3 * (int)(src[0x18])) + (3 * (int)(src[0x21])) + (int)(src[0x20]) + 8) / 16; |
| dst[0x73] = ((9 * (int)(src[0x19])) + (3 * (int)(src[0x1A])) + (3 * (int)(src[0x21])) + (int)(src[0x22]) + 8) / 16; |
| dst[0x74] = ((9 * (int)(src[0x1A])) + (3 * (int)(src[0x19])) + (3 * (int)(src[0x22])) + (int)(src[0x21]) + 8) / 16; |
| dst[0x75] = ((9 * (int)(src[0x1A])) + (3 * (int)(src[0x1B])) + (3 * (int)(src[0x22])) + (int)(src[0x23]) + 8) / 16; |
| dst[0x76] = ((9 * (int)(src[0x1B])) + (3 * (int)(src[0x1A])) + (3 * (int)(src[0x23])) + (int)(src[0x22]) + 8) / 16; |
| dst[0x77] = ((9 * (int)(src[0x1B])) + (3 * (int)(src[0x1C])) + (3 * (int)(src[0x23])) + (int)(src[0x24]) + 8) / 16; |
| dst[0x78] = ((9 * (int)(src[0x1C])) + (3 * (int)(src[0x1B])) + (3 * (int)(src[0x24])) + (int)(src[0x23]) + 8) / 16; |
| dst[0x79] = ((9 * (int)(src[0x1C])) + (3 * (int)(src[0x1D])) + (3 * (int)(src[0x24])) + (int)(src[0x25]) + 8) / 16; |
| dst[0x7A] = ((9 * (int)(src[0x1D])) + (3 * (int)(src[0x1C])) + (3 * (int)(src[0x25])) + (int)(src[0x24]) + 8) / 16; |
| dst[0x7B] = ((9 * (int)(src[0x1D])) + (3 * (int)(src[0x1E])) + (3 * (int)(src[0x25])) + (int)(src[0x26]) + 8) / 16; |
| dst[0x7C] = ((9 * (int)(src[0x1E])) + (3 * (int)(src[0x1D])) + (3 * (int)(src[0x26])) + (int)(src[0x25]) + 8) / 16; |
| dst[0x7D] = ((9 * (int)(src[0x1E])) + (3 * (int)(src[0x1F])) + (3 * (int)(src[0x26])) + (int)(src[0x27]) + 8) / 16; |
| dst[0x7E] = ((9 * (int)(src[0x1F])) + (3 * (int)(src[0x1E])) + (3 * (int)(src[0x27])) + (int)(src[0x26]) + 8) / 16; |
| dst[0x7F] = ((3 * (int)(src[0x1F])) + (int)(src[0x27]) + 2) / 4; |
| dst[0x80] = ((3 * (int)(src[0x20])) + (int)(src[0x18]) + 2) / 4; |
| dst[0x81] = ((9 * (int)(src[0x20])) + (3 * (int)(src[0x21])) + (3 * (int)(src[0x18])) + (int)(src[0x19]) + 8) / 16; |
| dst[0x82] = ((9 * (int)(src[0x21])) + (3 * (int)(src[0x20])) + (3 * (int)(src[0x19])) + (int)(src[0x18]) + 8) / 16; |
| dst[0x83] = ((9 * (int)(src[0x21])) + (3 * (int)(src[0x22])) + (3 * (int)(src[0x19])) + (int)(src[0x1A]) + 8) / 16; |
| dst[0x84] = ((9 * (int)(src[0x22])) + (3 * (int)(src[0x21])) + (3 * (int)(src[0x1A])) + (int)(src[0x19]) + 8) / 16; |
| dst[0x85] = ((9 * (int)(src[0x22])) + (3 * (int)(src[0x23])) + (3 * (int)(src[0x1A])) + (int)(src[0x1B]) + 8) / 16; |
| dst[0x86] = ((9 * (int)(src[0x23])) + (3 * (int)(src[0x22])) + (3 * (int)(src[0x1B])) + (int)(src[0x1A]) + 8) / 16; |
| dst[0x87] = ((9 * (int)(src[0x23])) + (3 * (int)(src[0x24])) + (3 * (int)(src[0x1B])) + (int)(src[0x1C]) + 8) / 16; |
| dst[0x88] = ((9 * (int)(src[0x24])) + (3 * (int)(src[0x23])) + (3 * (int)(src[0x1C])) + (int)(src[0x1B]) + 8) / 16; |
| dst[0x89] = ((9 * (int)(src[0x24])) + (3 * (int)(src[0x25])) + (3 * (int)(src[0x1C])) + (int)(src[0x1D]) + 8) / 16; |
| dst[0x8A] = ((9 * (int)(src[0x25])) + (3 * (int)(src[0x24])) + (3 * (int)(src[0x1D])) + (int)(src[0x1C]) + 8) / 16; |
| dst[0x8B] = ((9 * (int)(src[0x25])) + (3 * (int)(src[0x26])) + (3 * (int)(src[0x1D])) + (int)(src[0x1E]) + 8) / 16; |
| dst[0x8C] = ((9 * (int)(src[0x26])) + (3 * (int)(src[0x25])) + (3 * (int)(src[0x1E])) + (int)(src[0x1D]) + 8) / 16; |
| dst[0x8D] = ((9 * (int)(src[0x26])) + (3 * (int)(src[0x27])) + (3 * (int)(src[0x1E])) + (int)(src[0x1F]) + 8) / 16; |
| dst[0x8E] = ((9 * (int)(src[0x27])) + (3 * (int)(src[0x26])) + (3 * (int)(src[0x1F])) + (int)(src[0x1E]) + 8) / 16; |
| dst[0x8F] = ((3 * (int)(src[0x27])) + (int)(src[0x1F]) + 2) / 4; |
| dst[0x90] = ((3 * (int)(src[0x20])) + (int)(src[0x28]) + 2) / 4; |
| dst[0x91] = ((9 * (int)(src[0x20])) + (3 * (int)(src[0x21])) + (3 * (int)(src[0x28])) + (int)(src[0x29]) + 8) / 16; |
| dst[0x92] = ((9 * (int)(src[0x21])) + (3 * (int)(src[0x20])) + (3 * (int)(src[0x29])) + (int)(src[0x28]) + 8) / 16; |
| dst[0x93] = ((9 * (int)(src[0x21])) + (3 * (int)(src[0x22])) + (3 * (int)(src[0x29])) + (int)(src[0x2A]) + 8) / 16; |
| dst[0x94] = ((9 * (int)(src[0x22])) + (3 * (int)(src[0x21])) + (3 * (int)(src[0x2A])) + (int)(src[0x29]) + 8) / 16; |
| dst[0x95] = ((9 * (int)(src[0x22])) + (3 * (int)(src[0x23])) + (3 * (int)(src[0x2A])) + (int)(src[0x2B]) + 8) / 16; |
| dst[0x96] = ((9 * (int)(src[0x23])) + (3 * (int)(src[0x22])) + (3 * (int)(src[0x2B])) + (int)(src[0x2A]) + 8) / 16; |
| dst[0x97] = ((9 * (int)(src[0x23])) + (3 * (int)(src[0x24])) + (3 * (int)(src[0x2B])) + (int)(src[0x2C]) + 8) / 16; |
| dst[0x98] = ((9 * (int)(src[0x24])) + (3 * (int)(src[0x23])) + (3 * (int)(src[0x2C])) + (int)(src[0x2B]) + 8) / 16; |
| dst[0x99] = ((9 * (int)(src[0x24])) + (3 * (int)(src[0x25])) + (3 * (int)(src[0x2C])) + (int)(src[0x2D]) + 8) / 16; |
| dst[0x9A] = ((9 * (int)(src[0x25])) + (3 * (int)(src[0x24])) + (3 * (int)(src[0x2D])) + (int)(src[0x2C]) + 8) / 16; |
| dst[0x9B] = ((9 * (int)(src[0x25])) + (3 * (int)(src[0x26])) + (3 * (int)(src[0x2D])) + (int)(src[0x2E]) + 8) / 16; |
| dst[0x9C] = ((9 * (int)(src[0x26])) + (3 * (int)(src[0x25])) + (3 * (int)(src[0x2E])) + (int)(src[0x2D]) + 8) / 16; |
| dst[0x9D] = ((9 * (int)(src[0x26])) + (3 * (int)(src[0x27])) + (3 * (int)(src[0x2E])) + (int)(src[0x2F]) + 8) / 16; |
| dst[0x9E] = ((9 * (int)(src[0x27])) + (3 * (int)(src[0x26])) + (3 * (int)(src[0x2F])) + (int)(src[0x2E]) + 8) / 16; |
| dst[0x9F] = ((3 * (int)(src[0x27])) + (int)(src[0x2F]) + 2) / 4; |
| dst[0xA0] = ((3 * (int)(src[0x28])) + (int)(src[0x20]) + 2) / 4; |
| dst[0xA1] = ((9 * (int)(src[0x28])) + (3 * (int)(src[0x29])) + (3 * (int)(src[0x20])) + (int)(src[0x21]) + 8) / 16; |
| dst[0xA2] = ((9 * (int)(src[0x29])) + (3 * (int)(src[0x28])) + (3 * (int)(src[0x21])) + (int)(src[0x20]) + 8) / 16; |
| dst[0xA3] = ((9 * (int)(src[0x29])) + (3 * (int)(src[0x2A])) + (3 * (int)(src[0x21])) + (int)(src[0x22]) + 8) / 16; |
| dst[0xA4] = ((9 * (int)(src[0x2A])) + (3 * (int)(src[0x29])) + (3 * (int)(src[0x22])) + (int)(src[0x21]) + 8) / 16; |
| dst[0xA5] = ((9 * (int)(src[0x2A])) + (3 * (int)(src[0x2B])) + (3 * (int)(src[0x22])) + (int)(src[0x23]) + 8) / 16; |
| dst[0xA6] = ((9 * (int)(src[0x2B])) + (3 * (int)(src[0x2A])) + (3 * (int)(src[0x23])) + (int)(src[0x22]) + 8) / 16; |
| dst[0xA7] = ((9 * (int)(src[0x2B])) + (3 * (int)(src[0x2C])) + (3 * (int)(src[0x23])) + (int)(src[0x24]) + 8) / 16; |
| dst[0xA8] = ((9 * (int)(src[0x2C])) + (3 * (int)(src[0x2B])) + (3 * (int)(src[0x24])) + (int)(src[0x23]) + 8) / 16; |
| dst[0xA9] = ((9 * (int)(src[0x2C])) + (3 * (int)(src[0x2D])) + (3 * (int)(src[0x24])) + (int)(src[0x25]) + 8) / 16; |
| dst[0xAA] = ((9 * (int)(src[0x2D])) + (3 * (int)(src[0x2C])) + (3 * (int)(src[0x25])) + (int)(src[0x24]) + 8) / 16; |
| dst[0xAB] = ((9 * (int)(src[0x2D])) + (3 * (int)(src[0x2E])) + (3 * (int)(src[0x25])) + (int)(src[0x26]) + 8) / 16; |
| dst[0xAC] = ((9 * (int)(src[0x2E])) + (3 * (int)(src[0x2D])) + (3 * (int)(src[0x26])) + (int)(src[0x25]) + 8) / 16; |
| dst[0xAD] = ((9 * (int)(src[0x2E])) + (3 * (int)(src[0x2F])) + (3 * (int)(src[0x26])) + (int)(src[0x27]) + 8) / 16; |
| dst[0xAE] = ((9 * (int)(src[0x2F])) + (3 * (int)(src[0x2E])) + (3 * (int)(src[0x27])) + (int)(src[0x26]) + 8) / 16; |
| dst[0xAF] = ((3 * (int)(src[0x2F])) + (int)(src[0x27]) + 2) / 4; |
| dst[0xB0] = ((3 * (int)(src[0x28])) + (int)(src[0x30]) + 2) / 4; |
| dst[0xB1] = ((9 * (int)(src[0x28])) + (3 * (int)(src[0x29])) + (3 * (int)(src[0x30])) + (int)(src[0x31]) + 8) / 16; |
| dst[0xB2] = ((9 * (int)(src[0x29])) + (3 * (int)(src[0x28])) + (3 * (int)(src[0x31])) + (int)(src[0x30]) + 8) / 16; |
| dst[0xB3] = ((9 * (int)(src[0x29])) + (3 * (int)(src[0x2A])) + (3 * (int)(src[0x31])) + (int)(src[0x32]) + 8) / 16; |
| dst[0xB4] = ((9 * (int)(src[0x2A])) + (3 * (int)(src[0x29])) + (3 * (int)(src[0x32])) + (int)(src[0x31]) + 8) / 16; |
| dst[0xB5] = ((9 * (int)(src[0x2A])) + (3 * (int)(src[0x2B])) + (3 * (int)(src[0x32])) + (int)(src[0x33]) + 8) / 16; |
| dst[0xB6] = ((9 * (int)(src[0x2B])) + (3 * (int)(src[0x2A])) + (3 * (int)(src[0x33])) + (int)(src[0x32]) + 8) / 16; |
| dst[0xB7] = ((9 * (int)(src[0x2B])) + (3 * (int)(src[0x2C])) + (3 * (int)(src[0x33])) + (int)(src[0x34]) + 8) / 16; |
| dst[0xB8] = ((9 * (int)(src[0x2C])) + (3 * (int)(src[0x2B])) + (3 * (int)(src[0x34])) + (int)(src[0x33]) + 8) / 16; |
| dst[0xB9] = ((9 * (int)(src[0x2C])) + (3 * (int)(src[0x2D])) + (3 * (int)(src[0x34])) + (int)(src[0x35]) + 8) / 16; |
| dst[0xBA] = ((9 * (int)(src[0x2D])) + (3 * (int)(src[0x2C])) + (3 * (int)(src[0x35])) + (int)(src[0x34]) + 8) / 16; |
| dst[0xBB] = ((9 * (int)(src[0x2D])) + (3 * (int)(src[0x2E])) + (3 * (int)(src[0x35])) + (int)(src[0x36]) + 8) / 16; |
| dst[0xBC] = ((9 * (int)(src[0x2E])) + (3 * (int)(src[0x2D])) + (3 * (int)(src[0x36])) + (int)(src[0x35]) + 8) / 16; |
| dst[0xBD] = ((9 * (int)(src[0x2E])) + (3 * (int)(src[0x2F])) + (3 * (int)(src[0x36])) + (int)(src[0x37]) + 8) / 16; |
| dst[0xBE] = ((9 * (int)(src[0x2F])) + (3 * (int)(src[0x2E])) + (3 * (int)(src[0x37])) + (int)(src[0x36]) + 8) / 16; |
| dst[0xBF] = ((3 * (int)(src[0x2F])) + (int)(src[0x37]) + 2) / 4; |
| dst[0xC0] = ((3 * (int)(src[0x30])) + (int)(src[0x28]) + 2) / 4; |
| dst[0xC1] = ((9 * (int)(src[0x30])) + (3 * (int)(src[0x31])) + (3 * (int)(src[0x28])) + (int)(src[0x29]) + 8) / 16; |
| dst[0xC2] = ((9 * (int)(src[0x31])) + (3 * (int)(src[0x30])) + (3 * (int)(src[0x29])) + (int)(src[0x28]) + 8) / 16; |
| dst[0xC3] = ((9 * (int)(src[0x31])) + (3 * (int)(src[0x32])) + (3 * (int)(src[0x29])) + (int)(src[0x2A]) + 8) / 16; |
| dst[0xC4] = ((9 * (int)(src[0x32])) + (3 * (int)(src[0x31])) + (3 * (int)(src[0x2A])) + (int)(src[0x29]) + 8) / 16; |
| dst[0xC5] = ((9 * (int)(src[0x32])) + (3 * (int)(src[0x33])) + (3 * (int)(src[0x2A])) + (int)(src[0x2B]) + 8) / 16; |
| dst[0xC6] = ((9 * (int)(src[0x33])) + (3 * (int)(src[0x32])) + (3 * (int)(src[0x2B])) + (int)(src[0x2A]) + 8) / 16; |
| dst[0xC7] = ((9 * (int)(src[0x33])) + (3 * (int)(src[0x34])) + (3 * (int)(src[0x2B])) + (int)(src[0x2C]) + 8) / 16; |
| dst[0xC8] = ((9 * (int)(src[0x34])) + (3 * (int)(src[0x33])) + (3 * (int)(src[0x2C])) + (int)(src[0x2B]) + 8) / 16; |
| dst[0xC9] = ((9 * (int)(src[0x34])) + (3 * (int)(src[0x35])) + (3 * (int)(src[0x2C])) + (int)(src[0x2D]) + 8) / 16; |
| dst[0xCA] = ((9 * (int)(src[0x35])) + (3 * (int)(src[0x34])) + (3 * (int)(src[0x2D])) + (int)(src[0x2C]) + 8) / 16; |
| dst[0xCB] = ((9 * (int)(src[0x35])) + (3 * (int)(src[0x36])) + (3 * (int)(src[0x2D])) + (int)(src[0x2E]) + 8) / 16; |
| dst[0xCC] = ((9 * (int)(src[0x36])) + (3 * (int)(src[0x35])) + (3 * (int)(src[0x2E])) + (int)(src[0x2D]) + 8) / 16; |
| dst[0xCD] = ((9 * (int)(src[0x36])) + (3 * (int)(src[0x37])) + (3 * (int)(src[0x2E])) + (int)(src[0x2F]) + 8) / 16; |
| dst[0xCE] = ((9 * (int)(src[0x37])) + (3 * (int)(src[0x36])) + (3 * (int)(src[0x2F])) + (int)(src[0x2E]) + 8) / 16; |
| dst[0xCF] = ((3 * (int)(src[0x37])) + (int)(src[0x2F]) + 2) / 4; |
| dst[0xD0] = ((3 * (int)(src[0x30])) + (int)(src[0x38]) + 2) / 4; |
| dst[0xD1] = ((9 * (int)(src[0x30])) + (3 * (int)(src[0x31])) + (3 * (int)(src[0x38])) + (int)(src[0x39]) + 8) / 16; |
| dst[0xD2] = ((9 * (int)(src[0x31])) + (3 * (int)(src[0x30])) + (3 * (int)(src[0x39])) + (int)(src[0x38]) + 8) / 16; |
| dst[0xD3] = ((9 * (int)(src[0x31])) + (3 * (int)(src[0x32])) + (3 * (int)(src[0x39])) + (int)(src[0x3A]) + 8) / 16; |
| dst[0xD4] = ((9 * (int)(src[0x32])) + (3 * (int)(src[0x31])) + (3 * (int)(src[0x3A])) + (int)(src[0x39]) + 8) / 16; |
| dst[0xD5] = ((9 * (int)(src[0x32])) + (3 * (int)(src[0x33])) + (3 * (int)(src[0x3A])) + (int)(src[0x3B]) + 8) / 16; |
| dst[0xD6] = ((9 * (int)(src[0x33])) + (3 * (int)(src[0x32])) + (3 * (int)(src[0x3B])) + (int)(src[0x3A]) + 8) / 16; |
| dst[0xD7] = ((9 * (int)(src[0x33])) + (3 * (int)(src[0x34])) + (3 * (int)(src[0x3B])) + (int)(src[0x3C]) + 8) / 16; |
| dst[0xD8] = ((9 * (int)(src[0x34])) + (3 * (int)(src[0x33])) + (3 * (int)(src[0x3C])) + (int)(src[0x3B]) + 8) / 16; |
| dst[0xD9] = ((9 * (int)(src[0x34])) + (3 * (int)(src[0x35])) + (3 * (int)(src[0x3C])) + (int)(src[0x3D]) + 8) / 16; |
| dst[0xDA] = ((9 * (int)(src[0x35])) + (3 * (int)(src[0x34])) + (3 * (int)(src[0x3D])) + (int)(src[0x3C]) + 8) / 16; |
| dst[0xDB] = ((9 * (int)(src[0x35])) + (3 * (int)(src[0x36])) + (3 * (int)(src[0x3D])) + (int)(src[0x3E]) + 8) / 16; |
| dst[0xDC] = ((9 * (int)(src[0x36])) + (3 * (int)(src[0x35])) + (3 * (int)(src[0x3E])) + (int)(src[0x3D]) + 8) / 16; |
| dst[0xDD] = ((9 * (int)(src[0x36])) + (3 * (int)(src[0x37])) + (3 * (int)(src[0x3E])) + (int)(src[0x3F]) + 8) / 16; |
| dst[0xDE] = ((9 * (int)(src[0x37])) + (3 * (int)(src[0x36])) + (3 * (int)(src[0x3F])) + (int)(src[0x3E]) + 8) / 16; |
| dst[0xDF] = ((3 * (int)(src[0x37])) + (int)(src[0x3F]) + 2) / 4; |
| dst[0xE0] = ((3 * (int)(src[0x38])) + (int)(src[0x30]) + 2) / 4; |
| dst[0xE1] = ((9 * (int)(src[0x38])) + (3 * (int)(src[0x39])) + (3 * (int)(src[0x30])) + (int)(src[0x31]) + 8) / 16; |
| dst[0xE2] = ((9 * (int)(src[0x39])) + (3 * (int)(src[0x38])) + (3 * (int)(src[0x31])) + (int)(src[0x30]) + 8) / 16; |
| dst[0xE3] = ((9 * (int)(src[0x39])) + (3 * (int)(src[0x3A])) + (3 * (int)(src[0x31])) + (int)(src[0x32]) + 8) / 16; |
| dst[0xE4] = ((9 * (int)(src[0x3A])) + (3 * (int)(src[0x39])) + (3 * (int)(src[0x32])) + (int)(src[0x31]) + 8) / 16; |
| dst[0xE5] = ((9 * (int)(src[0x3A])) + (3 * (int)(src[0x3B])) + (3 * (int)(src[0x32])) + (int)(src[0x33]) + 8) / 16; |
| dst[0xE6] = ((9 * (int)(src[0x3B])) + (3 * (int)(src[0x3A])) + (3 * (int)(src[0x33])) + (int)(src[0x32]) + 8) / 16; |
| dst[0xE7] = ((9 * (int)(src[0x3B])) + (3 * (int)(src[0x3C])) + (3 * (int)(src[0x33])) + (int)(src[0x34]) + 8) / 16; |
| dst[0xE8] = ((9 * (int)(src[0x3C])) + (3 * (int)(src[0x3B])) + (3 * (int)(src[0x34])) + (int)(src[0x33]) + 8) / 16; |
| dst[0xE9] = ((9 * (int)(src[0x3C])) + (3 * (int)(src[0x3D])) + (3 * (int)(src[0x34])) + (int)(src[0x35]) + 8) / 16; |
| dst[0xEA] = ((9 * (int)(src[0x3D])) + (3 * (int)(src[0x3C])) + (3 * (int)(src[0x35])) + (int)(src[0x34]) + 8) / 16; |
| dst[0xEB] = ((9 * (int)(src[0x3D])) + (3 * (int)(src[0x3E])) + (3 * (int)(src[0x35])) + (int)(src[0x36]) + 8) / 16; |
| dst[0xEC] = ((9 * (int)(src[0x3E])) + (3 * (int)(src[0x3D])) + (3 * (int)(src[0x36])) + (int)(src[0x35]) + 8) / 16; |
| dst[0xED] = ((9 * (int)(src[0x3E])) + (3 * (int)(src[0x3F])) + (3 * (int)(src[0x36])) + (int)(src[0x37]) + 8) / 16; |
| dst[0xEE] = ((9 * (int)(src[0x3F])) + (3 * (int)(src[0x3E])) + (3 * (int)(src[0x37])) + (int)(src[0x36]) + 8) / 16; |
| dst[0xEF] = ((3 * (int)(src[0x3F])) + (int)(src[0x37]) + 2) / 4; |
| dst[0xF0] = src[0x38]; |
| dst[0xF1] = ((3 * (int)(src[0x38])) + (int)(src[0x39]) + 2) / 4; |
| dst[0xF2] = ((3 * (int)(src[0x39])) + (int)(src[0x38]) + 2) / 4; |
| dst[0xF3] = ((3 * (int)(src[0x39])) + (int)(src[0x3A]) + 2) / 4; |
| dst[0xF4] = ((3 * (int)(src[0x3A])) + (int)(src[0x39]) + 2) / 4; |
| dst[0xF5] = ((3 * (int)(src[0x3A])) + (int)(src[0x3B]) + 2) / 4; |
| dst[0xF6] = ((3 * (int)(src[0x3B])) + (int)(src[0x3A]) + 2) / 4; |
| dst[0xF7] = ((3 * (int)(src[0x3B])) + (int)(src[0x3C]) + 2) / 4; |
| dst[0xF8] = ((3 * (int)(src[0x3C])) + (int)(src[0x3B]) + 2) / 4; |
| dst[0xF9] = ((3 * (int)(src[0x3C])) + (int)(src[0x3D]) + 2) / 4; |
| dst[0xFA] = ((3 * (int)(src[0x3D])) + (int)(src[0x3C]) + 2) / 4; |
| dst[0xFB] = ((3 * (int)(src[0x3D])) + (int)(src[0x3E]) + 2) / 4; |
| dst[0xFC] = ((3 * (int)(src[0x3E])) + (int)(src[0x3D]) + 2) / 4; |
| dst[0xFD] = ((3 * (int)(src[0x3E])) + (int)(src[0x3F]) + 2) / 4; |
| dst[0xFE] = ((3 * (int)(src[0x3F])) + (int)(src[0x3E]) + 2) / 4; |
| dst[0xFF] = src[0x3F]; |
| |
| // clang-format on |
| } |
| |
| static void // |
| basic_handsum_decode__scale_horizontal( |
| basic_handsum_decode__pixel_buffer* pixbuf) { |
| uint8_t dst[1024]; |
| uint32_t w = pixbuf->width; |
| const uint8_t* src = pixbuf->bgra_pixels; |
| |
| for (int y = 0; y < 16; y++) { |
| int dstx = 0; |
| uint32_t acc0 = 0; |
| uint32_t acc1 = 0; |
| uint32_t acc2 = 0; |
| uint32_t acc3 = 0; |
| uint32_t remainder = 16; |
| for (int srcx = 0; srcx < 16; srcx++) { |
| int si = (64 * y) + (4 * srcx); |
| uint32_t s0 = src[si + 0]; |
| uint32_t s1 = src[si + 1]; |
| uint32_t s2 = src[si + 2]; |
| uint32_t s3 = src[si + 3]; |
| |
| if (remainder > w) { |
| remainder -= w; |
| acc0 += w * s0; |
| acc1 += w * s1; |
| acc2 += w * s2; |
| acc3 += w * s3; |
| |
| } else { |
| acc0 += remainder * s0; |
| acc1 += remainder * s1; |
| acc2 += remainder * s2; |
| acc3 += remainder * s3; |
| |
| int di = (4 * w * y) + (4 * dstx); |
| dst[di + 0] = (acc0 + 8) / 16; |
| dst[di + 1] = (acc1 + 8) / 16; |
| dst[di + 2] = (acc2 + 8) / 16; |
| dst[di + 3] = (acc3 + 8) / 16; |
| dstx++; |
| |
| uint32_t partial = w - remainder; |
| |
| acc0 = partial * s0; |
| acc1 = partial * s1; |
| acc2 = partial * s2; |
| acc3 = partial * s3; |
| |
| remainder = 16 - partial; |
| } |
| } |
| } |
| |
| for (int y = 0; y < 16; y++) { |
| memcpy(&pixbuf->bgra_pixels[4 * w * y], &dst[4 * w * y], 4 * w); |
| } |
| } |
| |
| static void // |
| basic_handsum_decode__scale_vertical( |
| basic_handsum_decode__pixel_buffer* pixbuf) { |
| uint8_t dst[1024]; |
| uint32_t h = pixbuf->height; |
| const uint8_t* src = pixbuf->bgra_pixels; |
| |
| for (int x = 0; x < 16; x++) { |
| int dsty = 0; |
| uint32_t acc0 = 0; |
| uint32_t acc1 = 0; |
| uint32_t acc2 = 0; |
| uint32_t acc3 = 0; |
| uint32_t remainder = 16; |
| for (int srcy = 0; srcy < 16; srcy++) { |
| int si = (64 * srcy) + (4 * x); |
| uint32_t s0 = src[si + 0]; |
| uint32_t s1 = src[si + 1]; |
| uint32_t s2 = src[si + 2]; |
| uint32_t s3 = src[si + 3]; |
| |
| if (remainder > h) { |
| remainder -= h; |
| acc0 += h * s0; |
| acc1 += h * s1; |
| acc2 += h * s2; |
| acc3 += h * s3; |
| |
| } else { |
| acc0 += remainder * s0; |
| acc1 += remainder * s1; |
| acc2 += remainder * s2; |
| acc3 += remainder * s3; |
| |
| int di = (64 * dsty) + (4 * x); |
| dst[di + 0] = (acc0 + 8) / 16; |
| dst[di + 1] = (acc1 + 8) / 16; |
| dst[di + 2] = (acc2 + 8) / 16; |
| dst[di + 3] = (acc3 + 8) / 16; |
| dsty++; |
| |
| uint32_t partial = h - remainder; |
| |
| acc0 = partial * s0; |
| acc1 = partial * s1; |
| acc2 = partial * s2; |
| acc3 = partial * s3; |
| |
| remainder = 16 - partial; |
| } |
| } |
| } |
| |
| memcpy(&pixbuf->bgra_pixels[0], &dst[0], 64 * h); |
| } |
| |
| static void // |
| basic_handsum_decode__convert_ycbcr_bgra( |
| basic_handsum_decode__pixel_buffer* dst, |
| const uint8_t* restrict yy, |
| const uint8_t* restrict cb, |
| const uint8_t* restrict cr) { |
| for (int i = 0; i < 256; i++) { |
| int32_t yy1 = (int32_t)(yy[i]) * 0x10101; |
| int32_t cb1 = (int32_t)(cb[i]) - 128; |
| int32_t cr1 = (int32_t)(cr[i]) - 128; |
| |
| int32_t r = yy1 + (91881 * cr1); |
| if (((uint32_t)(r)&0xFF000000u) == 0) { |
| r >>= 16; |
| } else { |
| r = -1 ^ (r >> 31); |
| } |
| |
| int32_t g = yy1 - (22554 * cb1) - (46802 * cr1); |
| if (((uint32_t)(g)&0xFF000000u) == 0) { |
| g >>= 16; |
| } else { |
| g = -1 ^ (g >> 31); |
| } |
| |
| int32_t b = yy1 + (116130 * cb1); |
| if (((uint32_t)(b)&0xFF000000u) == 0) { |
| b >>= 16; |
| } else { |
| b = -1 ^ (b >> 31); |
| } |
| |
| dst->bgra_pixels[(4 * i) + 0] = b; |
| dst->bgra_pixels[(4 * i) + 1] = g; |
| dst->bgra_pixels[(4 * i) + 2] = r; |
| dst->bgra_pixels[(4 * i) + 3] = 0xFF; |
| } |
| } |
| |
| BASIC_HANDSUM_DECODE__MAYBE_STATIC int // |
| basic_handsum_decode__decode(basic_handsum_decode__pixel_buffer* dst, |
| const uint8_t* src_ptr, |
| const size_t src_len) { |
| if (dst == NULL) { |
| return BASIC_HANDSUM_DECODE__RESULT__DST_IS_NULL; |
| } |
| dst->width = 0; |
| dst->height = 0; |
| |
| if (src_len < 147) { |
| return BASIC_HANDSUM_DECODE__RESULT__SRC_IS_TOO_SHORT; |
| } else if ((src_ptr[0] != 0xFE) || // |
| (src_ptr[1] != 0xD7) || // |
| ((src_ptr[2] & 0xE0) != 0x60) || // |
| ((src_ptr[2] & 0x1F) == 0x1F)) { |
| return BASIC_HANDSUM_DECODE__RESULT__SRC_IS_NOT_HANDSUM_C3Q4; |
| } |
| |
| if ((src_ptr[2] & 0x10) == 0x00) { // Landscape. |
| dst->width = 16; |
| dst->height = 1 + (src_ptr[2] & 0x0F); |
| } else { // Portrait. |
| dst->width = 1 + (src_ptr[2] & 0x0F); |
| dst->height = 16; |
| } |
| |
| uint8_t luma_quad_block[256]; |
| uint8_t tmp[64]; |
| uint8_t cb_quad_block[256]; |
| uint8_t cr_quad_block[256]; |
| size_t bit_offset = 24; |
| |
| bit_offset = basic_handsum_decode__decode_block_q4( // |
| &luma_quad_block[0x00], 16, src_ptr, bit_offset); |
| bit_offset = basic_handsum_decode__decode_block_q4( // |
| &luma_quad_block[0x08], 16, src_ptr, bit_offset); |
| bit_offset = basic_handsum_decode__decode_block_q4( // |
| &luma_quad_block[0x80], 16, src_ptr, bit_offset); |
| bit_offset = basic_handsum_decode__decode_block_q4( // |
| &luma_quad_block[0x88], 16, src_ptr, bit_offset); |
| |
| basic_handsum_decode__smooth_block_seams_16x16(&luma_quad_block[0]); |
| |
| bit_offset = basic_handsum_decode__decode_block_q4( // |
| &tmp[0], 8, src_ptr, bit_offset); |
| |
| basic_handsum_decode__scale_and_bias_chroma_down(&tmp[0]); |
| basic_handsum_decode__upsample_from(&cb_quad_block[0], &tmp[0]); |
| |
| bit_offset = basic_handsum_decode__decode_block_q4( // |
| &tmp[0], 8, src_ptr, bit_offset); |
| |
| basic_handsum_decode__scale_and_bias_chroma_down(&tmp[0]); |
| basic_handsum_decode__upsample_from(&cr_quad_block[0], &tmp[0]); |
| |
| basic_handsum_decode__convert_ycbcr_bgra( |
| dst, &luma_quad_block[0], &cb_quad_block[0], &cr_quad_block[0]); |
| |
| if (dst->width < 16) { |
| basic_handsum_decode__scale_horizontal(dst); |
| } else if (dst->height < 16) { |
| basic_handsum_decode__scale_vertical(dst); |
| } |
| |
| return BASIC_HANDSUM_DECODE__RESULT__OK; |
| } |
| |
| #endif // BASIC_HANDSUM_DECODE_IMPLEMENTATION |
| #endif // BASIC_HANDSUM_DECODE_INCLUDE_GUARD |
