215 lines
6.4 KiB
C
215 lines
6.4 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <stdio.h>
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#include "entropy.h"
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#include "string.h"
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#include "blockd.h"
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#include "onyxc_int.h"
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#include "vpx_mem/vpx_mem.h"
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#define uchar unsigned char /* typedefs can clash */
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#define uint unsigned int
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typedef const uchar cuchar;
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typedef const uint cuint;
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typedef vp8_prob Prob;
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#include "coefupdateprobs.h"
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DECLARE_ALIGNED(16, const unsigned char, vp8_norm[256]) =
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{
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0, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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DECLARE_ALIGNED(16, cuchar, vp8_coef_bands[16]) =
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{ 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7};
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DECLARE_ALIGNED(16, cuchar, vp8_prev_token_class[MAX_ENTROPY_TOKENS]) =
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{ 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0};
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DECLARE_ALIGNED(16, const int, vp8_default_zig_zag1d[16]) =
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{
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0, 1, 4, 8,
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5, 2, 3, 6,
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9, 12, 13, 10,
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7, 11, 14, 15,
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};
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DECLARE_ALIGNED(64, cuchar, vp8_coef_bands_8x8[64]) = { 0, 1, 2, 3, 5, 4, 4, 5,
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5, 3, 6, 3, 5, 4, 6, 6,
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6, 5, 5, 6, 6, 6, 6, 6,
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6, 6, 6, 6, 6, 6, 6, 6,
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6, 6, 6, 6, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7
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};
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DECLARE_ALIGNED(64, const int, vp8_default_zig_zag1d_8x8[64]) =
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{
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0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5,
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12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28,
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35, 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51,
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58, 59, 52, 45, 38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63,
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};
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DECLARE_ALIGNED(16, const short, vp8_default_inv_zig_zag[16]) =
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{
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1, 2, 6, 7,
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3, 5, 8, 13,
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4, 9, 12, 14,
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10, 11, 15, 16
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};
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DECLARE_ALIGNED(16, short, vp8_default_zig_zag_mask[16]);
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DECLARE_ALIGNED(64, short, vp8_default_zig_zag_mask_8x8[64]);//int64_t
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/* Array indices are identical to previously-existing CONTEXT_NODE indices */
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const vp8_tree_index vp8_coef_tree[ 22] = /* corresponding _CONTEXT_NODEs */
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{
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-DCT_EOB_TOKEN, 2, /* 0 = EOB */
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-ZERO_TOKEN, 4, /* 1 = ZERO */
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-ONE_TOKEN, 6, /* 2 = ONE */
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8, 12, /* 3 = LOW_VAL */
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-TWO_TOKEN, 10, /* 4 = TWO */
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-THREE_TOKEN, -FOUR_TOKEN, /* 5 = THREE */
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14, 16, /* 6 = HIGH_LOW */
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-DCT_VAL_CATEGORY1, -DCT_VAL_CATEGORY2, /* 7 = CAT_ONE */
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18, 20, /* 8 = CAT_THREEFOUR */
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-DCT_VAL_CATEGORY3, -DCT_VAL_CATEGORY4, /* 9 = CAT_THREE */
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-DCT_VAL_CATEGORY5, -DCT_VAL_CATEGORY6 /* 10 = CAT_FIVE */
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};
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struct vp8_token_struct vp8_coef_encodings[MAX_ENTROPY_TOKENS];
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/* Trees for extra bits. Probabilities are constant and
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do not depend on previously encoded bits */
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static const Prob Pcat1[] = { 159};
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static const Prob Pcat2[] = { 165, 145};
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static const Prob Pcat3[] = { 173, 148, 140};
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static const Prob Pcat4[] = { 176, 155, 140, 135};
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static const Prob Pcat5[] = { 180, 157, 141, 134, 130};
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static const Prob Pcat6[] =
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{ 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129};
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static vp8_tree_index cat1[2], cat2[4], cat3[6], cat4[8], cat5[10], cat6[26];
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void vp8_init_scan_order_mask()
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{
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int i;
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for (i = 0; i < 16; i++)
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{
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vp8_default_zig_zag_mask[vp8_default_zig_zag1d[i]] = 1 << i;
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}
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for (i = 0; i < 64; i++)
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{
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vp8_default_zig_zag_mask_8x8[vp8_default_zig_zag1d_8x8[i]] = 1 << i;
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}
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}
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static void init_bit_tree(vp8_tree_index *p, int n)
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{
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int i = 0;
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while (++i < n)
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{
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p[0] = p[1] = i << 1;
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p += 2;
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}
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p[0] = p[1] = 0;
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}
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static void init_bit_trees()
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{
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init_bit_tree(cat1, 1);
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init_bit_tree(cat2, 2);
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init_bit_tree(cat3, 3);
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init_bit_tree(cat4, 4);
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init_bit_tree(cat5, 5);
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init_bit_tree(cat6, 13);
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}
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vp8_extra_bit_struct vp8_extra_bits[12] =
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{
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{ 0, 0, 0, 0},
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{ 0, 0, 0, 1},
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{ 0, 0, 0, 2},
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{ 0, 0, 0, 3},
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{ 0, 0, 0, 4},
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{ cat1, Pcat1, 1, 5},
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{ cat2, Pcat2, 2, 7},
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{ cat3, Pcat3, 3, 11},
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{ cat4, Pcat4, 4, 19},
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{ cat5, Pcat5, 5, 35},
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{ cat6, Pcat6, 13, 67},
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{ 0, 0, 0, 0}
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};
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#include "default_coef_probs.h"
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#include "defaultcoefcounts.h"
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void vp8_default_coef_probs(VP8_COMMON *pc)
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{
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int h;
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vpx_memcpy(pc->fc.coef_probs, default_coef_probs,
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sizeof(default_coef_probs));
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h = 0;
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do
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{
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int i = 0;
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do
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{
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int k = 0;
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do
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{
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unsigned int branch_ct [ENTROPY_NODES] [2];
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vp8_tree_probs_from_distribution(
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MAX_ENTROPY_TOKENS, vp8_coef_encodings, vp8_coef_tree,
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pc->fc.coef_probs_8x8 [h][i][k], branch_ct, vp8_default_coef_counts_8x8 [h][i][k],
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256, 1);
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}
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while (++k < PREV_COEF_CONTEXTS);
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}
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while (++i < COEF_BANDS);
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}
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while (++h < BLOCK_TYPES);
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}
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void vp8_coef_tree_initialize()
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{
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init_bit_trees();
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vp8_tokens_from_tree(vp8_coef_encodings, vp8_coef_tree);
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}
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