// Copyright 2010 Google Inc. All Rights Reserved. // // Use of this source code is governed by a BSD-style license // that can be found in the COPYING file in the root of the source // tree. An additional intellectual property rights grant can be found // in the file PATENTS. All contributing project authors may // be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Coding trees and probas // // Author: Skal (pascal.massimino@gmail.com) #include #include "src/dec/common_dec.h" #include "src/dec/vp8_dec.h" #include "src/dec/vp8i_dec.h" #include "src/dsp/cpu.h" #include "src/utils/bit_reader_inl_utils.h" #include "src/utils/bit_reader_utils.h" #include "src/webp/types.h" WEBP_ASSUME_UNSAFE_INDEXABLE_ABI #if !defined(USE_GENERIC_TREE) #if !defined(__arm__) && !defined(_M_ARM) && !WEBP_AARCH64 && !defined(__wasm__) // using a table is ~1-2% slower on ARM. Prefer the coded-tree approach then. #define USE_GENERIC_TREE 1 // ALTERNATE_CODE #else #define USE_GENERIC_TREE 0 #endif #endif // USE_GENERIC_TREE #if (USE_GENERIC_TREE == 1) static const int8_t kYModesIntra4[18] = { -B_DC_PRED, 1, -B_TM_PRED, 2, -B_VE_PRED, 3, 4, 6, -B_HE_PRED, 5, -B_RD_PRED, -B_VR_PRED, -B_LD_PRED, 7, -B_VL_PRED, 8, -B_HD_PRED, -B_HU_PRED}; #endif //------------------------------------------------------------------------------ // Default probabilities // Paragraph 13.5 static const uint8_t CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { {{{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}, {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}, {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}}, {{253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128}, {189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128}, {106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128}}, { {1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128}, {181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128}, {78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128}, }, { {1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128}, {184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128}, {77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128}, }, {{1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128}, {170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128}, {37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128}}, {{1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128}, {207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128}, {102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128}}, {{1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128}, {177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128}, {80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128}}, {{1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128}, {246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128}, {255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}}}, {{{198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62}, {131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1}, {68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128}}, {{1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128}, {184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128}, {81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128}}, {{1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128}, {99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128}, {23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128}}, {{1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128}, {109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128}, {44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128}}, {{1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128}, {94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128}, {22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128}}, {{1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128}, {124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128}, {35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128}}, {{1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128}, {121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128}, {45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128}}, {{1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128}, {203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128}, {137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128}}}, {{{253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128}, {175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128}, {73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128}}, {{1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128}, {239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128}, {155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128}}, {{1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128}, {201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128}, {69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128}}, {{1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128}, {223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128}, {141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128}}, {{1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128}, {190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128}, {149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128}}, {{1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128}, {247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128}, {240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128}}, {{1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128}, {213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128}, {55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128}}, {{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}, {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}, {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}}}, {{{202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255}, {126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128}, {61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128}}, {{1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128}, {166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128}, {39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128}}, {{1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128}, {124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128}, {24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128}}, {{1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128}, {149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128}, {28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128}}, {{1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128}, {123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128}, {20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128}}, {{1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128}, {168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128}, {47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128}}, {{1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128}, {141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128}, {42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128}}, {{1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128}, {244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128}, {238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128}}}}; // Paragraph 11.5 static const uint8_t kBModesProba[NUM_BMODES][NUM_BMODES][NUM_BMODES - 1] = { {{231, 120, 48, 89, 115, 113, 120, 152, 112}, {152, 179, 64, 126, 170, 118, 46, 70, 95}, {175, 69, 143, 80, 85, 82, 72, 155, 103}, {56, 58, 10, 171, 218, 189, 17, 13, 152}, {114, 26, 17, 163, 44, 195, 21, 10, 173}, {121, 24, 80, 195, 26, 62, 44, 64, 85}, {144, 71, 10, 38, 171, 213, 144, 34, 26}, {170, 46, 55, 19, 136, 160, 33, 206, 71}, {63, 20, 8, 114, 114, 208, 12, 9, 226}, {81, 40, 11, 96, 182, 84, 29, 16, 36}}, {{134, 183, 89, 137, 98, 101, 106, 165, 148}, {72, 187, 100, 130, 157, 111, 32, 75, 80}, {66, 102, 167, 99, 74, 62, 40, 234, 128}, {41, 53, 9, 178, 241, 141, 26, 8, 107}, {74, 43, 26, 146, 73, 166, 49, 23, 157}, {65, 38, 105, 160, 51, 52, 31, 115, 128}, {104, 79, 12, 27, 217, 255, 87, 17, 7}, {87, 68, 71, 44, 114, 51, 15, 186, 23}, {47, 41, 14, 110, 182, 183, 21, 17, 194}, {66, 45, 25, 102, 197, 189, 23, 18, 22}}, {{88, 88, 147, 150, 42, 46, 45, 196, 205}, {43, 97, 183, 117, 85, 38, 35, 179, 61}, {39, 53, 200, 87, 26, 21, 43, 232, 171}, {56, 34, 51, 104, 114, 102, 29, 93, 77}, {39, 28, 85, 171, 58, 165, 90, 98, 64}, {34, 22, 116, 206, 23, 34, 43, 166, 73}, {107, 54, 32, 26, 51, 1, 81, 43, 31}, {68, 25, 106, 22, 64, 171, 36, 225, 114}, {34, 19, 21, 102, 132, 188, 16, 76, 124}, {62, 18, 78, 95, 85, 57, 50, 48, 51}}, {{193, 101, 35, 159, 215, 111, 89, 46, 111}, {60, 148, 31, 172, 219, 228, 21, 18, 111}, {112, 113, 77, 85, 179, 255, 38, 120, 114}, {40, 42, 1, 196, 245, 209, 10, 25, 109}, {88, 43, 29, 140, 166, 213, 37, 43, 154}, {61, 63, 30, 155, 67, 45, 68, 1, 209}, {100, 80, 8, 43, 154, 1, 51, 26, 71}, {142, 78, 78, 16, 255, 128, 34, 197, 171}, {41, 40, 5, 102, 211, 183, 4, 1, 221}, {51, 50, 17, 168, 209, 192, 23, 25, 82}}, {{138, 31, 36, 171, 27, 166, 38, 44, 229}, {67, 87, 58, 169, 82, 115, 26, 59, 179}, {63, 59, 90, 180, 59, 166, 93, 73, 154}, {40, 40, 21, 116, 143, 209, 34, 39, 175}, {47, 15, 16, 183, 34, 223, 49, 45, 183}, {46, 17, 33, 183, 6, 98, 15, 32, 183}, {57, 46, 22, 24, 128, 1, 54, 17, 37}, {65, 32, 73, 115, 28, 128, 23, 128, 205}, {40, 3, 9, 115, 51, 192, 18, 6, 223}, {87, 37, 9, 115, 59, 77, 64, 21, 47}}, {{104, 55, 44, 218, 9, 54, 53, 130, 226}, {64, 90, 70, 205, 40, 41, 23, 26, 57}, {54, 57, 112, 184, 5, 41, 38, 166, 213}, {30, 34, 26, 133, 152, 116, 10, 32, 134}, {39, 19, 53, 221, 26, 114, 32, 73, 255}, {31, 9, 65, 234, 2, 15, 1, 118, 73}, {75, 32, 12, 51, 192, 255, 160, 43, 51}, {88, 31, 35, 67, 102, 85, 55, 186, 85}, {56, 21, 23, 111, 59, 205, 45, 37, 192}, {55, 38, 70, 124, 73, 102, 1, 34, 98}}, {{125, 98, 42, 88, 104, 85, 117, 175, 82}, {95, 84, 53, 89, 128, 100, 113, 101, 45}, {75, 79, 123, 47, 51, 128, 81, 171, 1}, {57, 17, 5, 71, 102, 57, 53, 41, 49}, {38, 33, 13, 121, 57, 73, 26, 1, 85}, {41, 10, 67, 138, 77, 110, 90, 47, 114}, {115, 21, 2, 10, 102, 255, 166, 23, 6}, {101, 29, 16, 10, 85, 128, 101, 196, 26}, {57, 18, 10, 102, 102, 213, 34, 20, 43}, {117, 20, 15, 36, 163, 128, 68, 1, 26}}, {{102, 61, 71, 37, 34, 53, 31, 243, 192}, {69, 60, 71, 38, 73, 119, 28, 222, 37}, {68, 45, 128, 34, 1, 47, 11, 245, 171}, {62, 17, 19, 70, 146, 85, 55, 62, 70}, {37, 43, 37, 154, 100, 163, 85, 160, 1}, {63, 9, 92, 136, 28, 64, 32, 201, 85}, {75, 15, 9, 9, 64, 255, 184, 119, 16}, {86, 6, 28, 5, 64, 255, 25, 248, 1}, {56, 8, 17, 132, 137, 255, 55, 116, 128}, {58, 15, 20, 82, 135, 57, 26, 121, 40}}, {{164, 50, 31, 137, 154, 133, 25, 35, 218}, {51, 103, 44, 131, 131, 123, 31, 6, 158}, {86, 40, 64, 135, 148, 224, 45, 183, 128}, {22, 26, 17, 131, 240, 154, 14, 1, 209}, {45, 16, 21, 91, 64, 222, 7, 1, 197}, {56, 21, 39, 155, 60, 138, 23, 102, 213}, {83, 12, 13, 54, 192, 255, 68, 47, 28}, {85, 26, 85, 85, 128, 128, 32, 146, 171}, {18, 11, 7, 63, 144, 171, 4, 4, 246}, {35, 27, 10, 146, 174, 171, 12, 26, 128}}, {{190, 80, 35, 99, 180, 80, 126, 54, 45}, {85, 126, 47, 87, 176, 51, 41, 20, 32}, {101, 75, 128, 139, 118, 146, 116, 128, 85}, {56, 41, 15, 176, 236, 85, 37, 9, 62}, {71, 30, 17, 119, 118, 255, 17, 18, 138}, {101, 38, 60, 138, 55, 70, 43, 26, 142}, {146, 36, 19, 30, 171, 255, 97, 27, 20}, {138, 45, 61, 62, 219, 1, 81, 188, 64}, {32, 41, 20, 117, 151, 142, 20, 21, 163}, {112, 19, 12, 61, 195, 128, 48, 4, 24}}}; void VP8ResetProba(VP8Proba* const proba) { WEBP_UNSAFE_MEMSET(proba->segments, 255u, sizeof(proba->segments)); // proba->bands[][] is initialized later } static void ParseIntraMode(VP8BitReader* const br, VP8Decoder* const dec, int mb_x) { uint8_t* const top = dec->intra_t + 4 * mb_x; uint8_t* const left = dec->intra_l; VP8MBData* const block = dec->mb_data + mb_x; // Note: we don't save segment map (yet), as we don't expect // to decode more than 1 keyframe. if (dec->segment_hdr.update_map) { // Hardcoded tree parsing block->segment = !VP8GetBit(br, dec->proba.segments[0], "segments") ? VP8GetBit(br, dec->proba.segments[1], "segments") : VP8GetBit(br, dec->proba.segments[2], "segments") + 2; } else { block->segment = 0; // default for intra } if (dec->use_skip_proba) block->skip = VP8GetBit(br, dec->skip_p, "skip"); block->is_i4x4 = !VP8GetBit(br, 145, "block-size"); if (!block->is_i4x4) { // Hardcoded 16x16 intra-mode decision tree. const int ymode = VP8GetBit(br, 156, "pred-modes") ? (VP8GetBit(br, 128, "pred-modes") ? TM_PRED : H_PRED) : (VP8GetBit(br, 163, "pred-modes") ? V_PRED : DC_PRED); block->imodes[0] = ymode; WEBP_UNSAFE_MEMSET(top, ymode, 4 * sizeof(*top)); WEBP_UNSAFE_MEMSET(left, ymode, 4 * sizeof(*left)); } else { uint8_t* modes = block->imodes; int y; for (y = 0; y < 4; ++y) { int ymode = left[y]; int x; for (x = 0; x < 4; ++x) { const uint8_t* const prob = kBModesProba[top[x]][ymode]; #if (USE_GENERIC_TREE == 1) // Generic tree-parsing int i = kYModesIntra4[VP8GetBit(br, prob[0], "pred-modes")]; while (i > 0) { i = kYModesIntra4[2 * i + VP8GetBit(br, prob[i], "pred-modes")]; } ymode = -i; #else // Hardcoded tree parsing ymode = !VP8GetBit(br, prob[0], "pred-modes") ? B_DC_PRED : !VP8GetBit(br, prob[1], "pred-modes") ? B_TM_PRED : !VP8GetBit(br, prob[2], "pred-modes") ? B_VE_PRED : !VP8GetBit(br, prob[3], "pred-modes") ? (!VP8GetBit(br, prob[4], "pred-modes") ? B_HE_PRED : (!VP8GetBit(br, prob[5], "pred-modes") ? B_RD_PRED : B_VR_PRED)) : (!VP8GetBit(br, prob[6], "pred-modes") ? B_LD_PRED : (!VP8GetBit(br, prob[7], "pred-modes") ? B_VL_PRED : (!VP8GetBit(br, prob[8], "pred-modes") ? B_HD_PRED : B_HU_PRED))); #endif // USE_GENERIC_TREE top[x] = ymode; } WEBP_UNSAFE_MEMCPY(modes, top, 4 * sizeof(*top)); modes += 4; left[y] = ymode; } } // Hardcoded UVMode decision tree block->uvmode = !VP8GetBit(br, 142, "pred-modes-uv") ? DC_PRED : !VP8GetBit(br, 114, "pred-modes-uv") ? V_PRED : VP8GetBit(br, 183, "pred-modes-uv") ? TM_PRED : H_PRED; } int VP8ParseIntraModeRow(VP8BitReader* const br, VP8Decoder* const dec) { int mb_x; for (mb_x = 0; mb_x < dec->mb_w; ++mb_x) { ParseIntraMode(br, dec, mb_x); } return !dec->br.eof; } //------------------------------------------------------------------------------ // Paragraph 13 static const uint8_t CoeffsUpdateProba[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { {{{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255}, {249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255}, {234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255}, {250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255}, {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}}, {{{217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255}, {234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255}}, {{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255}}, {{255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255}, {250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}}, {{{186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255}, {234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255}, {251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255}}, {{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255}}, {{255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}}, {{{248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255}, {248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255}}, {{255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255}, {246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255}, {252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255}}, {{255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255}, {248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255}, {253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255}}, {{255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255}, {252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255}, {250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}, {{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}}}; // Paragraph 9.9 static const uint8_t kBands[16 + 1] = { 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, 0 // extra entry as sentinel }; void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec) { VP8Proba* const proba = &dec->proba; int t, b, c, p; for (t = 0; t < NUM_TYPES; ++t) { for (b = 0; b < NUM_BANDS; ++b) { for (c = 0; c < NUM_CTX; ++c) { for (p = 0; p < NUM_PROBAS; ++p) { const int v = VP8GetBit(br, CoeffsUpdateProba[t][b][c][p], "global-header") ? VP8GetValue(br, 8, "global-header") : CoeffsProba0[t][b][c][p]; proba->bands[t][b].probas[c][p] = v; } } } for (b = 0; b < 16 + 1; ++b) { proba->bands_ptr[t][b] = &proba->bands[t][kBands[b]]; } } dec->use_skip_proba = VP8Get(br, "global-header"); if (dec->use_skip_proba) { dec->skip_p = VP8GetValue(br, 8, "global-header"); } }