ref: e67660cf374d4301ccb044199e900afaba64baba
dir: /vp8/common/entropy.c/
/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE 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. */ #include "entropy.h" #include "blockd.h" #include "onyxc_int.h" #include "vpx_mem/vpx_mem.h" #include "coefupdateprobs.h" DECLARE_ALIGNED(16, const unsigned char, vp8_norm[256]) = { 0, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; DECLARE_ALIGNED(16, const unsigned char, vp8_coef_bands[16]) = { 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7 }; DECLARE_ALIGNED(16, const unsigned char, vp8_prev_token_class[MAX_ENTROPY_TOKENS]) = { 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0 }; DECLARE_ALIGNED(16, const int, vp8_default_zig_zag1d[16]) = { 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15, }; DECLARE_ALIGNED(16, const short, vp8_default_inv_zig_zag[16]) = { 1, 2, 6, 7, 3, 5, 8, 13, 4, 9, 12, 14, 10, 11, 15, 16 }; /* vp8_default_zig_zag_mask generated with: void vp8_init_scan_order_mask() { int i; for (i = 0; i < 16; ++i) { vp8_default_zig_zag_mask[vp8_default_zig_zag1d[i]] = 1 << i; } } */ DECLARE_ALIGNED(16, const short, vp8_default_zig_zag_mask[16]) = { 1, 2, 32, 64, 4, 16, 128, 4096, 8, 256, 2048, 8192, 512, 1024, 16384, -32768 }; const int vp8_mb_feature_data_bits[MB_LVL_MAX] = { 7, 6 }; /* Array indices are identical to previously-existing CONTEXT_NODE indices */ /* corresponding _CONTEXT_NODEs */ /* clang-format off */ const vp8_tree_index vp8_coef_tree[22] = { -DCT_EOB_TOKEN, 2, /* 0 = EOB */ -ZERO_TOKEN, 4, /* 1 = ZERO */ -ONE_TOKEN, 6, /* 2 = ONE */ 8, 12, /* 3 = LOW_VAL */ -TWO_TOKEN, 10, /* 4 = TWO */ -THREE_TOKEN, -FOUR_TOKEN, /* 5 = THREE */ 14, 16, /* 6 = HIGH_LOW */ -DCT_VAL_CATEGORY1, -DCT_VAL_CATEGORY2, /* 7 = CAT_ONE */ 18, 20, /* 8 = CAT_THREEFOUR */ -DCT_VAL_CATEGORY3, -DCT_VAL_CATEGORY4, /* 9 = CAT_THREE */ -DCT_VAL_CATEGORY5, -DCT_VAL_CATEGORY6 /* 10 = CAT_FIVE */ }; /* clang-format on */ /* vp8_coef_encodings generated with: vp8_tokens_from_tree(vp8_coef_encodings, vp8_coef_tree); */ vp8_token vp8_coef_encodings[MAX_ENTROPY_TOKENS] = { { 2, 2 }, { 6, 3 }, { 28, 5 }, { 58, 6 }, { 59, 6 }, { 60, 6 }, { 61, 6 }, { 124, 7 }, { 125, 7 }, { 126, 7 }, { 127, 7 }, { 0, 1 } }; /* Trees for extra bits. Probabilities are constant and do not depend on previously encoded bits */ static const vp8_prob Pcat1[] = { 159 }; static const vp8_prob Pcat2[] = { 165, 145 }; static const vp8_prob Pcat3[] = { 173, 148, 140 }; static const vp8_prob Pcat4[] = { 176, 155, 140, 135 }; static const vp8_prob Pcat5[] = { 180, 157, 141, 134, 130 }; static const vp8_prob Pcat6[] = { 254, 254, 243, 230, 196, 177, 153, 140, 133, 130, 129 }; /* tree index tables generated with: void init_bit_tree(vp8_tree_index *p, int n) { int i = 0; while (++i < n) { p[0] = p[1] = i << 1; p += 2; } p[0] = p[1] = 0; } void init_bit_trees() { init_bit_tree(cat1, 1); init_bit_tree(cat2, 2); init_bit_tree(cat3, 3); init_bit_tree(cat4, 4); init_bit_tree(cat5, 5); init_bit_tree(cat6, 11); } */ static const vp8_tree_index cat1[2] = { 0, 0 }; static const vp8_tree_index cat2[4] = { 2, 2, 0, 0 }; static const vp8_tree_index cat3[6] = { 2, 2, 4, 4, 0, 0 }; static const vp8_tree_index cat4[8] = { 2, 2, 4, 4, 6, 6, 0, 0 }; static const vp8_tree_index cat5[10] = { 2, 2, 4, 4, 6, 6, 8, 8, 0, 0 }; static const vp8_tree_index cat6[22] = { 2, 2, 4, 4, 6, 6, 8, 8, 10, 10, 12, 12, 14, 14, 16, 16, 18, 18, 20, 20, 0, 0 }; const vp8_extra_bit_struct vp8_extra_bits[12] = { { 0, 0, 0, 0 }, { 0, 0, 0, 1 }, { 0, 0, 0, 2 }, { 0, 0, 0, 3 }, { 0, 0, 0, 4 }, { cat1, Pcat1, 1, 5 }, { cat2, Pcat2, 2, 7 }, { cat3, Pcat3, 3, 11 }, { cat4, Pcat4, 4, 19 }, { cat5, Pcat5, 5, 35 }, { cat6, Pcat6, 11, 67 }, { 0, 0, 0, 0 } }; #include "default_coef_probs.h" void vp8_default_coef_probs(VP8_COMMON *pc) { memcpy(pc->fc.coef_probs, default_coef_probs, sizeof(default_coef_probs)); }