190 lines
7.5 KiB
C++
190 lines
7.5 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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// ----------------------------------------------------------------------------
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// Copyright 2011-2020 Arm Limited
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy
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// of the License at:
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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// ----------------------------------------------------------------------------
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/**
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* @brief Functions and data tables for numeric quantization..
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*/
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#include "astc_codec_internals.h"
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const uint8_t color_unquantization_tables[21][256] = {
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{
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0, 255
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},
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{
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0, 128, 255
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},
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{
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0, 85, 170, 255
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},
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{
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0, 64, 128, 192, 255
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},
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{
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0, 255, 51, 204, 102, 153
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},
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{
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0, 36, 73, 109, 146, 182, 219, 255
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},
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{
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0, 255, 28, 227, 56, 199, 84, 171, 113, 142
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},
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{
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0, 255, 69, 186, 23, 232, 92, 163, 46, 209, 116, 139
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},
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{
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0, 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255
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},
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{
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0, 255, 67, 188, 13, 242, 80, 175, 27, 228, 94, 161, 40, 215, 107, 148,
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54, 201, 121, 134
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},
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{
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0, 255, 33, 222, 66, 189, 99, 156, 11, 244, 44, 211, 77, 178, 110, 145,
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22, 233, 55, 200, 88, 167, 121, 134
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},
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{
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0, 8, 16, 24, 33, 41, 49, 57, 66, 74, 82, 90, 99, 107, 115, 123,
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132, 140, 148, 156, 165, 173, 181, 189, 198, 206, 214, 222, 231, 239, 247, 255
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},
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{
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0, 255, 32, 223, 65, 190, 97, 158, 6, 249, 39, 216, 71, 184, 104, 151,
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13, 242, 45, 210, 78, 177, 110, 145, 19, 236, 52, 203, 84, 171, 117, 138,
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26, 229, 58, 197, 91, 164, 123, 132
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},
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{
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0, 255, 16, 239, 32, 223, 48, 207, 65, 190, 81, 174, 97, 158, 113, 142,
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5, 250, 21, 234, 38, 217, 54, 201, 70, 185, 86, 169, 103, 152, 119, 136,
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11, 244, 27, 228, 43, 212, 59, 196, 76, 179, 92, 163, 108, 147, 124, 131
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},
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{
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0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60,
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65, 69, 73, 77, 81, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125,
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130, 134, 138, 142, 146, 150, 154, 158, 162, 166, 170, 174, 178, 182, 186, 190,
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195, 199, 203, 207, 211, 215, 219, 223, 227, 231, 235, 239, 243, 247, 251, 255
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},
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{
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0, 255, 16, 239, 32, 223, 48, 207, 64, 191, 80, 175, 96, 159, 112, 143,
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3, 252, 19, 236, 35, 220, 51, 204, 67, 188, 83, 172, 100, 155, 116, 139,
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6, 249, 22, 233, 38, 217, 54, 201, 71, 184, 87, 168, 103, 152, 119, 136,
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9, 246, 25, 230, 42, 213, 58, 197, 74, 181, 90, 165, 106, 149, 122, 133,
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13, 242, 29, 226, 45, 210, 61, 194, 77, 178, 93, 162, 109, 146, 125, 130
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},
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{
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0, 255, 8, 247, 16, 239, 24, 231, 32, 223, 40, 215, 48, 207, 56, 199,
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64, 191, 72, 183, 80, 175, 88, 167, 96, 159, 104, 151, 112, 143, 120, 135,
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2, 253, 10, 245, 18, 237, 26, 229, 35, 220, 43, 212, 51, 204, 59, 196,
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67, 188, 75, 180, 83, 172, 91, 164, 99, 156, 107, 148, 115, 140, 123, 132,
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5, 250, 13, 242, 21, 234, 29, 226, 37, 218, 45, 210, 53, 202, 61, 194,
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70, 185, 78, 177, 86, 169, 94, 161, 102, 153, 110, 145, 118, 137, 126, 129
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},
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{
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0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30,
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32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62,
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64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94,
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96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126,
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129, 131, 133, 135, 137, 139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 159,
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161, 163, 165, 167, 169, 171, 173, 175, 177, 179, 181, 183, 185, 187, 189, 191,
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193, 195, 197, 199, 201, 203, 205, 207, 209, 211, 213, 215, 217, 219, 221, 223,
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225, 227, 229, 231, 233, 235, 237, 239, 241, 243, 245, 247, 249, 251, 253, 255
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},
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{
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0, 255, 8, 247, 16, 239, 24, 231, 32, 223, 40, 215, 48, 207, 56, 199,
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64, 191, 72, 183, 80, 175, 88, 167, 96, 159, 104, 151, 112, 143, 120, 135,
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1, 254, 9, 246, 17, 238, 25, 230, 33, 222, 41, 214, 49, 206, 57, 198,
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65, 190, 73, 182, 81, 174, 89, 166, 97, 158, 105, 150, 113, 142, 121, 134,
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3, 252, 11, 244, 19, 236, 27, 228, 35, 220, 43, 212, 51, 204, 59, 196,
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67, 188, 75, 180, 83, 172, 91, 164, 99, 156, 107, 148, 115, 140, 123, 132,
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4, 251, 12, 243, 20, 235, 28, 227, 36, 219, 44, 211, 52, 203, 60, 195,
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68, 187, 76, 179, 84, 171, 92, 163, 100, 155, 108, 147, 116, 139, 124, 131,
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6, 249, 14, 241, 22, 233, 30, 225, 38, 217, 46, 209, 54, 201, 62, 193,
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70, 185, 78, 177, 86, 169, 94, 161, 102, 153, 110, 145, 118, 137, 126, 129
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},
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{
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0, 255, 4, 251, 8, 247, 12, 243, 16, 239, 20, 235, 24, 231, 28, 227,
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32, 223, 36, 219, 40, 215, 44, 211, 48, 207, 52, 203, 56, 199, 60, 195,
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64, 191, 68, 187, 72, 183, 76, 179, 80, 175, 84, 171, 88, 167, 92, 163,
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96, 159, 100, 155, 104, 151, 108, 147, 112, 143, 116, 139, 120, 135, 124, 131,
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1, 254, 5, 250, 9, 246, 13, 242, 17, 238, 21, 234, 25, 230, 29, 226,
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33, 222, 37, 218, 41, 214, 45, 210, 49, 206, 53, 202, 57, 198, 61, 194,
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65, 190, 69, 186, 73, 182, 77, 178, 81, 174, 85, 170, 89, 166, 93, 162,
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97, 158, 101, 154, 105, 150, 109, 146, 113, 142, 117, 138, 121, 134, 125, 130,
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2, 253, 6, 249, 10, 245, 14, 241, 18, 237, 22, 233, 26, 229, 30, 225,
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34, 221, 38, 217, 42, 213, 46, 209, 50, 205, 54, 201, 58, 197, 62, 193,
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66, 189, 70, 185, 74, 181, 78, 177, 82, 173, 86, 169, 90, 165, 94, 161,
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98, 157, 102, 153, 106, 149, 110, 145, 114, 141, 118, 137, 122, 133, 126, 129
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},
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{
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
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64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
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80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
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96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
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112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
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128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
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144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
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160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
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176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
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192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
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208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
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224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
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240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255
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}
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};
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// quantization_mode_table[integercount/2][bits] gives
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// us the quantization level for a given integer count and number of bits that
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// the integer may fit into. This is needed for color decoding,
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// and for the color encoding.
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int quantization_mode_table[17][128];
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void build_quantization_mode_table()
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{
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int i, j;
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for (i = 0; i <= 16; i++)
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{
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for (j = 0; j < 128; j++)
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{
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quantization_mode_table[i][j] = -1;
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}
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}
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for (i = 0; i < 21; i++)
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{
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for (j = 1; j <= 16; j++)
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{
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int p = compute_ise_bitcount(2 * j, (quantization_method) i);
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if (p < 128)
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quantization_mode_table[j][p] = i;
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}
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}
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for (i = 0; i <= 16; i++)
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{
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int largest_value_so_far = -1;
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for (j = 0; j < 128; j++)
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{
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if (quantization_mode_table[i][j] > largest_value_so_far)
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largest_value_so_far = quantization_mode_table[i][j];
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else
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quantization_mode_table[i][j] = largest_value_so_far;
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}
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}
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}
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