// Copyright 2016 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Note: ported from Chromium commit head: f06caa0 #include "vp9_uncompressed_header_parser.h" #include "base/logging.h" namespace media { namespace { // 10.5 Default probability tables Vp9FrameContext kVp9DefaultFrameContext = { // tx_probs_8x8 {{100}, {66}}, // tx_probs_16x16 {{20, 152}, {15, 101}}, // tx_probs_32x32 {{3, 136, 37}, {5, 52, 13}}, // coef_probs {// 4x4 {{{{{195, 29, 183}, {84, 49, 136}, {8, 42, 71}}, {{31, 107, 169}, {35, 99, 159}, {17, 82, 140}, {8, 66, 114}, {2, 44, 76}, {1, 19, 32}}, {{40, 132, 201}, {29, 114, 187}, {13, 91, 157}, {7, 75, 127}, {3, 58, 95}, {1, 28, 47}}, {{69, 142, 221}, {42, 122, 201}, {15, 91, 159}, {6, 67, 121}, {1, 42, 77}, {1, 17, 31}}, {{102, 148, 228}, {67, 117, 204}, {17, 82, 154}, {6, 59, 114}, {2, 39, 75}, {1, 15, 29}}, {{156, 57, 233}, {119, 57, 212}, {58, 48, 163}, {29, 40, 124}, {12, 30, 81}, {3, 12, 31}}}, {{{191, 107, 226}, {124, 117, 204}, {25, 99, 155}}, {{29, 148, 210}, {37, 126, 194}, {8, 93, 157}, {2, 68, 118}, {1, 39, 69}, {1, 17, 33}}, {{41, 151, 213}, {27, 123, 193}, {3, 82, 144}, {1, 58, 105}, {1, 32, 60}, {1, 13, 26}}, {{59, 159, 220}, {23, 126, 198}, {4, 88, 151}, {1, 66, 114}, {1, 38, 71}, {1, 18, 34}}, {{114, 136, 232}, {51, 114, 207}, {11, 83, 155}, {3, 56, 105}, {1, 33, 65}, {1, 17, 34}}, {{149, 65, 234}, {121, 57, 215}, {61, 49, 166}, {28, 36, 114}, {12, 25, 76}, {3, 16, 42}}}}, {{{{214, 49, 220}, {132, 63, 188}, {42, 65, 137}}, {{85, 137, 221}, {104, 131, 216}, {49, 111, 192}, {21, 87, 155}, {2, 49, 87}, {1, 16, 28}}, {{89, 163, 230}, {90, 137, 220}, {29, 100, 183}, {10, 70, 135}, {2, 42, 81}, {1, 17, 33}}, {{108, 167, 237}, {55, 133, 222}, {15, 97, 179}, {4, 72, 135}, {1, 45, 85}, {1, 19, 38}}, {{124, 146, 240}, {66, 124, 224}, {17, 88, 175}, {4, 58, 122}, {1, 36, 75}, {1, 18, 37}}, {{141, 79, 241}, {126, 70, 227}, {66, 58, 182}, {30, 44, 136}, {12, 34, 96}, {2, 20, 47}}}, {{{229, 99, 249}, {143, 111, 235}, {46, 109, 192}}, {{82, 158, 236}, {94, 146, 224}, {25, 117, 191}, {9, 87, 149}, {3, 56, 99}, {1, 33, 57}}, {{83, 167, 237}, {68, 145, 222}, {10, 103, 177}, {2, 72, 131}, {1, 41, 79}, {1, 20, 39}}, {{99, 167, 239}, {47, 141, 224}, {10, 104, 178}, {2, 73, 133}, {1, 44, 85}, {1, 22, 47}}, {{127, 145, 243}, {71, 129, 228}, {17, 93, 177}, {3, 61, 124}, {1, 41, 84}, {1, 21, 52}}, {{157, 78, 244}, {140, 72, 231}, {69, 58, 184}, {31, 44, 137}, {14, 38, 105}, {8, 23, 61}}}}}, // 8x8 {{{{{125, 34, 187}, {52, 41, 133}, {6, 31, 56}}, {{37, 109, 153}, {51, 102, 147}, {23, 87, 128}, {8, 67, 101}, {1, 41, 63}, {1, 19, 29}}, {{31, 154, 185}, {17, 127, 175}, {6, 96, 145}, {2, 73, 114}, {1, 51, 82}, {1, 28, 45}}, {{23, 163, 200}, {10, 131, 185}, {2, 93, 148}, {1, 67, 111}, {1, 41, 69}, {1, 14, 24}}, {{29, 176, 217}, {12, 145, 201}, {3, 101, 156}, {1, 69, 111}, {1, 39, 63}, {1, 14, 23}}, {{57, 192, 233}, {25, 154, 215}, {6, 109, 167}, {3, 78, 118}, {1, 48, 69}, {1, 21, 29}}}, {{{202, 105, 245}, {108, 106, 216}, {18, 90, 144}}, {{33, 172, 219}, {64, 149, 206}, {14, 117, 177}, {5, 90, 141}, {2, 61, 95}, {1, 37, 57}}, {{33, 179, 220}, {11, 140, 198}, {1, 89, 148}, {1, 60, 104}, {1, 33, 57}, {1, 12, 21}}, {{30, 181, 221}, {8, 141, 198}, {1, 87, 145}, {1, 58, 100}, {1, 31, 55}, {1, 12, 20}}, {{32, 186, 224}, {7, 142, 198}, {1, 86, 143}, {1, 58, 100}, {1, 31, 55}, {1, 12, 22}}, {{57, 192, 227}, {20, 143, 204}, {3, 96, 154}, {1, 68, 112}, {1, 42, 69}, {1, 19, 32}}}}, {{{{212, 35, 215}, {113, 47, 169}, {29, 48, 105}}, {{74, 129, 203}, {106, 120, 203}, {49, 107, 178}, {19, 84, 144}, {4, 50, 84}, {1, 15, 25}}, {{71, 172, 217}, {44, 141, 209}, {15, 102, 173}, {6, 76, 133}, {2, 51, 89}, {1, 24, 42}}, {{64, 185, 231}, {31, 148, 216}, {8, 103, 175}, {3, 74, 131}, {1, 46, 81}, {1, 18, 30}}, {{65, 196, 235}, {25, 157, 221}, {5, 105, 174}, {1, 67, 120}, {1, 38, 69}, {1, 15, 30}}, {{65, 204, 238}, {30, 156, 224}, {7, 107, 177}, {2, 70, 124}, {1, 42, 73}, {1, 18, 34}}}, {{{225, 86, 251}, {144, 104, 235}, {42, 99, 181}}, {{85, 175, 239}, {112, 165, 229}, {29, 136, 200}, {12, 103, 162}, {6, 77, 123}, {2, 53, 84}}, {{75, 183, 239}, {30, 155, 221}, {3, 106, 171}, {1, 74, 128}, {1, 44, 76}, {1, 17, 28}}, {{73, 185, 240}, {27, 159, 222}, {2, 107, 172}, {1, 75, 127}, {1, 42, 73}, {1, 17, 29}}, {{62, 190, 238}, {21, 159, 222}, {2, 107, 172}, {1, 72, 122}, {1, 40, 71}, {1, 18, 32}}, {{61, 199, 240}, {27, 161, 226}, {4, 113, 180}, {1, 76, 129}, {1, 46, 80}, {1, 23, 41}}}}}, // 16x16 {{{{{7, 27, 153}, {5, 30, 95}, {1, 16, 30}}, {{50, 75, 127}, {57, 75, 124}, {27, 67, 108}, {10, 54, 86}, {1, 33, 52}, {1, 12, 18}}, {{43, 125, 151}, {26, 108, 148}, {7, 83, 122}, {2, 59, 89}, {1, 38, 60}, {1, 17, 27}}, {{23, 144, 163}, {13, 112, 154}, {2, 75, 117}, {1, 50, 81}, {1, 31, 51}, {1, 14, 23}}, {{18, 162, 185}, {6, 123, 171}, {1, 78, 125}, {1, 51, 86}, {1, 31, 54}, {1, 14, 23}}, {{15, 199, 227}, {3, 150, 204}, {1, 91, 146}, {1, 55, 95}, {1, 30, 53}, {1, 11, 20}}}, {{{19, 55, 240}, {19, 59, 196}, {3, 52, 105}}, {{41, 166, 207}, {104, 153, 199}, {31, 123, 181}, {14, 101, 152}, {5, 72, 106}, {1, 36, 52}}, {{35, 176, 211}, {12, 131, 190}, {2, 88, 144}, {1, 60, 101}, {1, 36, 60}, {1, 16, 28}}, {{28, 183, 213}, {8, 134, 191}, {1, 86, 142}, {1, 56, 96}, {1, 30, 53}, {1, 12, 20}}, {{20, 190, 215}, {4, 135, 192}, {1, 84, 139}, {1, 53, 91}, {1, 28, 49}, {1, 11, 20}}, {{13, 196, 216}, {2, 137, 192}, {1, 86, 143}, {1, 57, 99}, {1, 32, 56}, {1, 13, 24}}}}, {{{{211, 29, 217}, {96, 47, 156}, {22, 43, 87}}, {{78, 120, 193}, {111, 116, 186}, {46, 102, 164}, {15, 80, 128}, {2, 49, 76}, {1, 18, 28}}, {{71, 161, 203}, {42, 132, 192}, {10, 98, 150}, {3, 69, 109}, {1, 44, 70}, {1, 18, 29}}, {{57, 186, 211}, {30, 140, 196}, {4, 93, 146}, {1, 62, 102}, {1, 38, 65}, {1, 16, 27}}, {{47, 199, 217}, {14, 145, 196}, {1, 88, 142}, {1, 57, 98}, {1, 36, 62}, {1, 15, 26}}, {{26, 219, 229}, {5, 155, 207}, {1, 94, 151}, {1, 60, 104}, {1, 36, 62}, {1, 16, 28}}}, {{{233, 29, 248}, {146, 47, 220}, {43, 52, 140}}, {{100, 163, 232}, {179, 161, 222}, {63, 142, 204}, {37, 113, 174}, {26, 89, 137}, {18, 68, 97}}, {{85, 181, 230}, {32, 146, 209}, {7, 100, 164}, {3, 71, 121}, {1, 45, 77}, {1, 18, 30}}, {{65, 187, 230}, {20, 148, 207}, {2, 97, 159}, {1, 68, 116}, {1, 40, 70}, {1, 14, 29}}, {{40, 194, 227}, {8, 147, 204}, {1, 94, 155}, {1, 65, 112}, {1, 39, 66}, {1, 14, 26}}, {{16, 208, 228}, {3, 151, 207}, {1, 98, 160}, {1, 67, 117}, {1, 41, 74}, {1, 17, 31}}}}}, // 32x32 {{{{{17, 38, 140}, {7, 34, 80}, {1, 17, 29}}, {{37, 75, 128}, {41, 76, 128}, {26, 66, 116}, {12, 52, 94}, {2, 32, 55}, {1, 10, 16}}, {{50, 127, 154}, {37, 109, 152}, {16, 82, 121}, {5, 59, 85}, {1, 35, 54}, {1, 13, 20}}, {{40, 142, 167}, {17, 110, 157}, {2, 71, 112}, {1, 44, 72}, {1, 27, 45}, {1, 11, 17}}, {{30, 175, 188}, {9, 124, 169}, {1, 74, 116}, {1, 48, 78}, {1, 30, 49}, {1, 11, 18}}, {{10, 222, 223}, {2, 150, 194}, {1, 83, 128}, {1, 48, 79}, {1, 27, 45}, {1, 11, 17}}}, {{{36, 41, 235}, {29, 36, 193}, {10, 27, 111}}, {{85, 165, 222}, {177, 162, 215}, {110, 135, 195}, {57, 113, 168}, {23, 83, 120}, {10, 49, 61}}, {{85, 190, 223}, {36, 139, 200}, {5, 90, 146}, {1, 60, 103}, {1, 38, 65}, {1, 18, 30}}, {{72, 202, 223}, {23, 141, 199}, {2, 86, 140}, {1, 56, 97}, {1, 36, 61}, {1, 16, 27}}, {{55, 218, 225}, {13, 145, 200}, {1, 86, 141}, {1, 57, 99}, {1, 35, 61}, {1, 13, 22}}, {{15, 235, 212}, {1, 132, 184}, {1, 84, 139}, {1, 57, 97}, {1, 34, 56}, {1, 14, 23}}}}, {{{{181, 21, 201}, {61, 37, 123}, {10, 38, 71}}, {{47, 106, 172}, {95, 104, 173}, {42, 93, 159}, {18, 77, 131}, {4, 50, 81}, {1, 17, 23}}, {{62, 147, 199}, {44, 130, 189}, {28, 102, 154}, {18, 75, 115}, {2, 44, 65}, {1, 12, 19}}, {{55, 153, 210}, {24, 130, 194}, {3, 93, 146}, {1, 61, 97}, {1, 31, 50}, {1, 10, 16}}, {{49, 186, 223}, {17, 148, 204}, {1, 96, 142}, {1, 53, 83}, {1, 26, 44}, {1, 11, 17}}, {{13, 217, 212}, {2, 136, 180}, {1, 78, 124}, {1, 50, 83}, {1, 29, 49}, {1, 14, 23}}}, {{{197, 13, 247}, {82, 17, 222}, {25, 17, 162}}, {{126, 186, 247}, {234, 191, 243}, {176, 177, 234}, {104, 158, 220}, {66, 128, 186}, {55, 90, 137}}, {{111, 197, 242}, {46, 158, 219}, {9, 104, 171}, {2, 65, 125}, {1, 44, 80}, {1, 17, 91}}, {{104, 208, 245}, {39, 168, 224}, {3, 109, 162}, {1, 79, 124}, {1, 50, 102}, {1, 43, 102}}, {{84, 220, 246}, {31, 177, 231}, {2, 115, 180}, {1, 79, 134}, {1, 55, 77}, {1, 60, 79}}, {{43, 243, 240}, {8, 180, 217}, {1, 115, 166}, {1, 84, 121}, {1, 51, 67}, {1, 16, 6}}}}}}, // skip_prob {192, 128, 64}, // inter_mode_probs {{2, 173, 34}, {7, 145, 85}, {7, 166, 63}, {7, 94, 66}, {8, 64, 46}, {17, 81, 31}, {25, 29, 30}}, // interp_filter_probs {{235, 162}, {36, 255}, {34, 3}, {149, 144}}, // is_inter_prob {9, 102, 187, 225}, // comp_mode_prob {239, 183, 119, 96, 41}, // single_ref_prob {{33, 16}, {77, 74}, {142, 142}, {172, 170}, {238, 247}}, // comp_ref_prob {50, 126, 123, 221, 226}, // y_mode_probs {{65, 32, 18, 144, 162, 194, 41, 51, 98}, {132, 68, 18, 165, 217, 196, 45, 40, 78}, {173, 80, 19, 176, 240, 193, 64, 35, 46}, {221, 135, 38, 194, 248, 121, 96, 85, 29}}, // uv_mode_probs {{120, 7, 76, 176, 208, 126, 28, 54, 103}, {48, 12, 154, 155, 139, 90, 34, 117, 119}, {67, 6, 25, 204, 243, 158, 13, 21, 96}, {97, 5, 44, 131, 176, 139, 48, 68, 97}, {83, 5, 42, 156, 111, 152, 26, 49, 152}, {80, 5, 58, 178, 74, 83, 33, 62, 145}, {86, 5, 32, 154, 192, 168, 14, 22, 163}, {85, 5, 32, 156, 216, 148, 19, 29, 73}, {77, 7, 64, 116, 132, 122, 37, 126, 120}, {101, 21, 107, 181, 192, 103, 19, 67, 125}}, // partition_probs {{199, 122, 141}, {147, 63, 159}, {148, 133, 118}, {121, 104, 114}, {174, 73, 87}, {92, 41, 83}, {82, 99, 50}, {53, 39, 39}, {177, 58, 59}, {68, 26, 63}, {52, 79, 25}, {17, 14, 12}, {222, 34, 30}, {72, 16, 44}, {58, 32, 12}, {10, 7, 6}}, // mv_joint_probs {32, 64, 96}, // mv_sign_prob {128, 128}, // mv_class_probs {{224, 144, 192, 168, 192, 176, 192, 198, 198, 245}, {216, 128, 176, 160, 176, 176, 192, 198, 198, 208}}, // mv_class0_bit_prob {216, 208}, // mv_bits_prob {{136, 140, 148, 160, 176, 192, 224, 234, 234, 240}, {136, 140, 148, 160, 176, 192, 224, 234, 234, 240}}, // mv_class0_fr_probs {{{128, 128, 64}, {96, 112, 64}}, {{128, 128, 64}, {96, 112, 64}}}, // mv_fr_probs {{64, 96, 64}, {64, 96, 64}}, // mv_class0_hp_prob {160, 160}, // mv_hp_prob {128, 128}, }; // Helper function for Vp9Parser::ReadTileInfo. Defined as // calc_min_log2_tile_cols in spec 6.2.14 Tile size calculation. int GetMinLog2TileCols(int sb64_cols) { const int kMaxTileWidthB64 = 64; int min_log2 = 0; while ((kMaxTileWidthB64 << min_log2) < sb64_cols) min_log2++; return min_log2; } // Helper function for Vp9Parser::ReadTileInfo. Defined as // calc_max_log2_tile_cols in spec 6.2.14 Tile size calculation. int GetMaxLog2TileCols(int sb64_cols) { const int kMinTileWidthB64 = 4; int max_log2 = 1; while ((sb64_cols >> max_log2) >= kMinTileWidthB64) max_log2++; return max_log2 - 1; } } // namespace Vp9UncompressedHeaderParser::Vp9UncompressedHeaderParser( Vp9Parser::Context* context) : context_(context) {} uint8_t Vp9UncompressedHeaderParser::ReadProfile() { uint8_t profile = 0; // LSB first. if (reader_.ReadBool()) profile |= 1; if (reader_.ReadBool()) profile |= 2; if (profile > 2 && reader_.ReadBool()) profile += 1; return profile; } // 6.2.1 Frame sync syntax bool Vp9UncompressedHeaderParser::VerifySyncCode() { const int kSyncCode = 0x498342; if (reader_.ReadLiteral(8 * 3) != kSyncCode) { DVLOG(1) << "Invalid frame sync code"; return false; } return true; } // 6.2.2 Color config syntax bool Vp9UncompressedHeaderParser::ReadColorConfig(Vp9FrameHeader* fhdr) { if (fhdr->profile == 2 || fhdr->profile == 3) { fhdr->bit_depth = reader_.ReadBool() ? 12 : 10; } else { fhdr->bit_depth = 8; } fhdr->color_space = static_cast(reader_.ReadLiteral(3)); if (fhdr->color_space != Vp9ColorSpace::SRGB) { fhdr->color_range = reader_.ReadBool(); if (fhdr->profile == 1 || fhdr->profile == 3) { fhdr->subsampling_x = reader_.ReadBool() ? 1 : 0; fhdr->subsampling_y = reader_.ReadBool() ? 1 : 0; if (fhdr->subsampling_x == 1 && fhdr->subsampling_y == 1) { DVLOG(1) << "4:2:0 color not supported in profile 1 or 3"; return false; } bool reserved = reader_.ReadBool(); if (reserved) { DVLOG(1) << "reserved bit set"; return false; } } else { fhdr->subsampling_x = fhdr->subsampling_y = 1; } } else { fhdr->color_range = true; if (fhdr->profile == 1 || fhdr->profile == 3) { fhdr->subsampling_x = fhdr->subsampling_y = 0; bool reserved = reader_.ReadBool(); if (reserved) { DVLOG(1) << "reserved bit set"; return false; } } else { DVLOG(1) << "4:4:4 color not supported in profile 0 or 2"; return false; } } return true; } // 6.2.3 Frame size syntax void Vp9UncompressedHeaderParser::ReadFrameSize(Vp9FrameHeader* fhdr) { fhdr->frame_width = reader_.ReadLiteral(16) + 1; fhdr->frame_height = reader_.ReadLiteral(16) + 1; } // 6.2.4 Render size syntax void Vp9UncompressedHeaderParser::ReadRenderSize(Vp9FrameHeader* fhdr) { if (reader_.ReadBool()) { fhdr->render_width = reader_.ReadLiteral(16) + 1; fhdr->render_height = reader_.ReadLiteral(16) + 1; } else { fhdr->render_width = fhdr->frame_width; fhdr->render_height = fhdr->frame_height; } } // 6.2.5 Frame size with refs syntax bool Vp9UncompressedHeaderParser::ReadFrameSizeFromRefs(Vp9FrameHeader* fhdr) { bool found_ref = false; for (const auto& idx : fhdr->ref_frame_idx) { found_ref = reader_.ReadBool(); if (found_ref) { const Vp9Parser::ReferenceSlot& ref = context_->GetRefSlot(idx); DCHECK(ref.initialized); fhdr->frame_width = ref.frame_width; fhdr->frame_height = ref.frame_height; const unsigned kMaxDimension = 1u << 16; DCHECK_LE(fhdr->frame_width, kMaxDimension); DCHECK_LE(fhdr->frame_height, kMaxDimension); break; } } if (!found_ref) ReadFrameSize(fhdr); // 7.2.5 Frame size with refs semantics bool has_valid_ref_frame = false; for (const auto& idx : fhdr->ref_frame_idx) { const Vp9Parser::ReferenceSlot& ref = context_->GetRefSlot(idx); if (2 * fhdr->frame_width >= ref.frame_width && 2 * fhdr->frame_height >= ref.frame_height && fhdr->frame_width <= 16 * ref.frame_width && fhdr->frame_height <= 16 * ref.frame_height) { has_valid_ref_frame = true; break; } } if (!has_valid_ref_frame) { DVLOG(1) << "There should be at least one reference frame meeting " << "size conditions."; return false; } ReadRenderSize(fhdr); return true; } // 6.2.7 Interpolation filter syntax Vp9InterpolationFilter Vp9UncompressedHeaderParser::ReadInterpolationFilter() { if (reader_.ReadBool()) return Vp9InterpolationFilter::SWITCHABLE; // The mapping table for next two bits. const Vp9InterpolationFilter table[] = { Vp9InterpolationFilter::EIGHTTAP_SMOOTH, Vp9InterpolationFilter::EIGHTTAP, Vp9InterpolationFilter::EIGHTTAP_SHARP, Vp9InterpolationFilter::BILINEAR, }; return table[reader_.ReadLiteral(2)]; } void Vp9UncompressedHeaderParser::SetupPastIndependence(Vp9FrameHeader* fhdr) { memset(&context_->segmentation_, 0, sizeof(context_->segmentation_)); ResetLoopfilter(); fhdr->frame_context = kVp9DefaultFrameContext; DCHECK(fhdr->frame_context.IsValid()); } // 6.2.8 Loop filter params syntax void Vp9UncompressedHeaderParser::ReadLoopFilterParams() { Vp9LoopFilterParams& loop_filter = context_->loop_filter_; loop_filter.level = reader_.ReadLiteral(6); loop_filter.sharpness = reader_.ReadLiteral(3); loop_filter.delta_update = false; loop_filter.delta_enabled = reader_.ReadBool(); if (loop_filter.delta_enabled) { loop_filter.delta_update = reader_.ReadBool(); if (loop_filter.delta_update) { for (size_t i = 0; i < Vp9RefType::VP9_FRAME_MAX; i++) { loop_filter.update_ref_deltas[i] = reader_.ReadBool(); if (loop_filter.update_ref_deltas[i]) loop_filter.ref_deltas[i] = reader_.ReadSignedLiteral(6); } for (size_t i = 0; i < Vp9LoopFilterParams::kNumModeDeltas; i++) { loop_filter.update_mode_deltas[i] = reader_.ReadBool(); if (loop_filter.update_mode_deltas[i]) loop_filter.mode_deltas[i] = reader_.ReadSignedLiteral(6); } } } } // 6.2.9 Quantization params syntax void Vp9UncompressedHeaderParser::ReadQuantizationParams( Vp9QuantizationParams* quants) { quants->base_q_idx = reader_.ReadLiteral(8); quants->delta_q_y_dc = ReadDeltaQ(); quants->delta_q_uv_dc = ReadDeltaQ(); quants->delta_q_uv_ac = ReadDeltaQ(); } // 6.2.10 Delta quantizer syntax int8_t Vp9UncompressedHeaderParser::ReadDeltaQ() { if (reader_.ReadBool()) return reader_.ReadSignedLiteral(4); return 0; } // 6.2.11 Segmentation params syntax bool Vp9UncompressedHeaderParser::ReadSegmentationParams() { Vp9SegmentationParams& segmentation = context_->segmentation_; segmentation.update_map = false; segmentation.update_data = false; segmentation.enabled = reader_.ReadBool(); if (!segmentation.enabled) return true; segmentation.update_map = reader_.ReadBool(); if (segmentation.update_map) { for (auto& tree_prob : segmentation.tree_probs) { tree_prob = ReadProb(); } segmentation.temporal_update = reader_.ReadBool(); for (auto& pred_prob : segmentation.pred_probs) { pred_prob = segmentation.temporal_update ? ReadProb() : kVp9MaxProb; } } segmentation.update_data = reader_.ReadBool(); if (segmentation.update_data) { segmentation.abs_or_delta_update = reader_.ReadBool(); const int kFeatureDataBits[] = {8, 6, 2, 0}; const bool kFeatureDataSigned[] = {true, true, false, false}; for (size_t i = 0; i < Vp9SegmentationParams::kNumSegments; i++) { for (size_t j = 0; j < Vp9SegmentationParams::SEG_LVL_MAX; j++) { int16_t data = 0; segmentation.feature_enabled[i][j] = reader_.ReadBool(); if (segmentation.feature_enabled[i][j]) { data = reader_.ReadLiteral(kFeatureDataBits[j]); if (kFeatureDataSigned[j]) if (reader_.ReadBool()) { // 7.2.9 if (segmentation.abs_or_delta_update) { DVLOG(1) << "feature_sign should be 0" << " if abs_or_delta_update is 1"; return false; } data = -data; } } segmentation.feature_data[i][j] = data; } } } return true; } // 6.2.12 Probability syntax uint8_t Vp9UncompressedHeaderParser::ReadProb() { return reader_.ReadBool() ? reader_.ReadLiteral(8) : kVp9MaxProb; } // 6.2.13 Tile info syntax bool Vp9UncompressedHeaderParser::ReadTileInfo(Vp9FrameHeader* fhdr) { int sb64_cols = (fhdr->frame_width + 63) / 64; int min_log2_tile_cols = GetMinLog2TileCols(sb64_cols); int max_log2_tile_cols = GetMaxLog2TileCols(sb64_cols); int max_ones = max_log2_tile_cols - min_log2_tile_cols; fhdr->tile_cols_log2 = min_log2_tile_cols; while (max_ones-- && reader_.ReadBool()) fhdr->tile_cols_log2++; fhdr->tile_rows_log2 = reader_.ReadBool() ? 1 : 0; if (fhdr->tile_rows_log2 > 0 && reader_.ReadBool()) fhdr->tile_rows_log2++; // 7.2.11 Tile info semantics if (fhdr->tile_cols_log2 > 6) { DVLOG(1) << "tile_cols_log2 should be <= 6"; return false; } return true; } void Vp9UncompressedHeaderParser::ResetLoopfilter() { Vp9LoopFilterParams& loop_filter = context_->loop_filter_; loop_filter.delta_enabled = true; loop_filter.delta_update = true; loop_filter.ref_deltas[VP9_FRAME_INTRA] = 1; loop_filter.ref_deltas[VP9_FRAME_LAST] = 0; loop_filter.ref_deltas[VP9_FRAME_GOLDEN] = -1; loop_filter.ref_deltas[VP9_FRAME_ALTREF] = -1; memset(loop_filter.mode_deltas, 0, sizeof(loop_filter.mode_deltas)); } // 6.2 Uncompressed header syntax bool Vp9UncompressedHeaderParser::Parse(const uint8_t* stream, off_t frame_size, Vp9FrameHeader* fhdr) { DVLOG(2) << "Vp9UncompressedHeaderParser::Parse"; reader_.Initialize(stream, frame_size); fhdr->data = stream; fhdr->frame_size = frame_size; // frame marker if (reader_.ReadLiteral(2) != 0x2) { DVLOG(1) << "frame marker shall be equal to 2"; return false; } fhdr->profile = ReadProfile(); if (fhdr->profile >= kVp9MaxProfile) { DVLOG(1) << "Unsupported bitstream profile"; return false; } fhdr->show_existing_frame = reader_.ReadBool(); if (fhdr->show_existing_frame) { fhdr->frame_to_show_map_idx = reader_.ReadLiteral(3); fhdr->show_frame = true; if (!reader_.ConsumeTrailingBits()) { DVLOG(1) << "trailing bits are not zero"; return false; } if (!reader_.IsValid()) { DVLOG(1) << "parser reads beyond the end of buffer"; return false; } fhdr->uncompressed_header_size = reader_.GetBytesRead(); fhdr->header_size_in_bytes = 0; return true; } fhdr->frame_type = static_cast(reader_.ReadBool()); fhdr->show_frame = reader_.ReadBool(); fhdr->error_resilient_mode = reader_.ReadBool(); if (fhdr->IsKeyframe()) { if (!VerifySyncCode()) return false; if (!ReadColorConfig(fhdr)) return false; ReadFrameSize(fhdr); ReadRenderSize(fhdr); fhdr->refresh_frame_flags = 0xff; } else { if (!fhdr->show_frame) fhdr->intra_only = reader_.ReadBool(); if (!fhdr->error_resilient_mode) fhdr->reset_frame_context = reader_.ReadLiteral(2); if (fhdr->intra_only) { if (!VerifySyncCode()) return false; if (fhdr->profile > 0) { if (!ReadColorConfig(fhdr)) return false; } else { fhdr->bit_depth = 8; fhdr->color_space = Vp9ColorSpace::BT_601; fhdr->subsampling_x = fhdr->subsampling_y = 1; } fhdr->refresh_frame_flags = reader_.ReadLiteral(8); ReadFrameSize(fhdr); ReadRenderSize(fhdr); } else { fhdr->refresh_frame_flags = reader_.ReadLiteral(8); static_assert(arraysize(fhdr->ref_frame_sign_bias) >= Vp9RefType::VP9_FRAME_LAST + kVp9NumRefsPerFrame, "ref_frame_sign_bias is not big enough"); for (size_t i = 0; i < kVp9NumRefsPerFrame; i++) { fhdr->ref_frame_idx[i] = reader_.ReadLiteral(kVp9NumRefFramesLog2); fhdr->ref_frame_sign_bias[Vp9RefType::VP9_FRAME_LAST + i] = reader_.ReadBool(); // 8.2 Frame order constraints // ref_frame_idx[i] refers to an earlier decoded frame. const Vp9Parser::ReferenceSlot& ref = context_->GetRefSlot(fhdr->ref_frame_idx[i]); if (!ref.initialized) { DVLOG(1) << "ref_frame_idx[" << i << "]=" << static_cast(fhdr->ref_frame_idx[i]) << " refers to unused frame"; return false; } // 7.2 Uncompressed header semantics // the selected reference frames match the current frame in bit depth, // profile, chroma subsampling, and color space. if (ref.profile != fhdr->profile) { DVLOG(1) << "profile of referenced frame mismatch"; return false; } if (i == 0) { // Below fields are not specified for inter-frame in header, so copy // them from referenced frame. fhdr->bit_depth = ref.bit_depth; fhdr->color_space = ref.color_space; fhdr->subsampling_x = ref.subsampling_x; fhdr->subsampling_y = ref.subsampling_y; } else { if (fhdr->bit_depth != ref.bit_depth) { DVLOG(1) << "bit_depth of referenced frame mismatch"; return false; } if (fhdr->color_space != ref.color_space) { DVLOG(1) << "color_space of referenced frame mismatch"; return false; } if (fhdr->subsampling_x != ref.subsampling_x || fhdr->subsampling_y != ref.subsampling_y) { DVLOG(1) << "chroma subsampling of referenced frame mismatch"; return false; } } } if (!ReadFrameSizeFromRefs(fhdr)) return false; fhdr->allow_high_precision_mv = reader_.ReadBool(); fhdr->interpolation_filter = ReadInterpolationFilter(); } } if (fhdr->error_resilient_mode) { fhdr->refresh_frame_context = false; fhdr->frame_parallel_decoding_mode = true; } else { fhdr->refresh_frame_context = reader_.ReadBool(); fhdr->frame_parallel_decoding_mode = reader_.ReadBool(); } fhdr->frame_context_idx_to_save_probs = fhdr->frame_context_idx = reader_.ReadLiteral(kVp9NumFrameContextsLog2); if (fhdr->IsIntra()) { SetupPastIndependence(fhdr); if (fhdr->IsKeyframe() || fhdr->error_resilient_mode || fhdr->reset_frame_context == 3) { for (size_t i = 0; i < kVp9NumFrameContexts; ++i) context_->UpdateFrameContext(i, fhdr->frame_context); } else if (fhdr->reset_frame_context == 2) { context_->UpdateFrameContext(fhdr->frame_context_idx, fhdr->frame_context); } fhdr->frame_context_idx = 0; } ReadLoopFilterParams(); ReadQuantizationParams(&fhdr->quant_params); if (!ReadSegmentationParams()) return false; if (!ReadTileInfo(fhdr)) return false; fhdr->header_size_in_bytes = reader_.ReadLiteral(16); if (fhdr->header_size_in_bytes == 0) { DVLOG(1) << "invalid header size"; return false; } if (!reader_.ConsumeTrailingBits()) { DVLOG(1) << "trailing bits are not zero"; return false; } if (!reader_.IsValid()) { DVLOG(1) << "parser reads beyond the end of buffer"; return false; } fhdr->uncompressed_header_size = reader_.GetBytesRead(); return true; } } // namespace media