ref: 9970d8b66203b4cb50902ea59b083aa28a5c1f7d
dir: /vp9/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 <stdio.h>
#include "entropy.h"
#include "string.h"
#include "blockd.h"
#include "onyxc_int.h"
#include "entropymode.h"
#include "vpx_mem/vpx_mem.h"
#define uchar unsigned char /* typedefs can clash */
#define uint unsigned int
typedef const uchar cuchar;
typedef const uint cuint;
typedef vp9_prob Prob;
#include "coefupdateprobs.h"
const int vp9_i8x8_block[4] = {0, 2, 8, 10};
DECLARE_ALIGNED(16, const unsigned char, vp9_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 int, vp9_coef_bands[16]) = {
0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7
};
DECLARE_ALIGNED(16, cuchar, vp9_prev_token_class[MAX_ENTROPY_TOKENS]) = {
0, 1, 2, 2, 3, 3, 3, 3, 3, 3, 3, 0
};
DECLARE_ALIGNED(16, const int, vp9_default_zig_zag1d[16]) = {
0, 1, 4, 8,
5, 2, 3, 6,
9, 12, 13, 10,
7, 11, 14, 15,
};
DECLARE_ALIGNED(16, const int, vp9_col_scan[16]) = {
0, 4, 8, 12,
1, 5, 9, 13,
2, 6, 10, 14,
3, 7, 11, 15
};
DECLARE_ALIGNED(16, const int, vp9_row_scan[16]) = {
0, 1, 2, 3,
4, 5, 6, 7,
8, 9, 10, 11,
12, 13, 14, 15
};
DECLARE_ALIGNED(64, const int, vp9_coef_bands_8x8[64]) = { 0, 1, 2, 3, 5, 4, 4, 5,
5, 3, 6, 3, 5, 4, 6, 6,
6, 5, 5, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7
};
DECLARE_ALIGNED(64, const int, vp9_default_zig_zag1d_8x8[64]) = {
0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5,
12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28,
35, 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51,
58, 59, 52, 45, 38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63,
};
// Table can be optimized.
DECLARE_ALIGNED(16, const int, vp9_coef_bands_16x16[256]) = {
0, 1, 2, 3, 5, 4, 4, 5, 5, 3, 6, 3, 5, 4, 6, 6,
6, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
};
DECLARE_ALIGNED(16, const int, vp9_default_zig_zag1d_16x16[256]) = {
0, 1, 16, 32, 17, 2, 3, 18, 33, 48, 64, 49, 34, 19, 4, 5,
20, 35, 50, 65, 80, 96, 81, 66, 51, 36, 21, 6, 7, 22, 37, 52,
67, 82, 97, 112, 128, 113, 98, 83, 68, 53, 38, 23, 8, 9, 24, 39,
54, 69, 84, 99, 114, 129, 144, 160, 145, 130, 115, 100, 85, 70, 55, 40,
25, 10, 11, 26, 41, 56, 71, 86, 101, 116, 131, 146, 161, 176, 192, 177,
162, 147, 132, 117, 102, 87, 72, 57, 42, 27, 12, 13, 28, 43, 58, 73,
88, 103, 118, 133, 148, 163, 178, 193, 208, 224, 209, 194, 179, 164, 149, 134,
119, 104, 89, 74, 59, 44, 29, 14, 15, 30, 45, 60, 75, 90, 105, 120,
135, 150, 165, 180, 195, 210, 225, 240, 241, 226, 211, 196, 181, 166, 151, 136,
121, 106, 91, 76, 61, 46, 31, 47, 62, 77, 92, 107, 122, 137, 152, 167,
182, 197, 212, 227, 242, 243, 228, 213, 198, 183, 168, 153, 138, 123, 108, 93,
78, 63, 79, 94, 109, 124, 139, 154, 169, 184, 199, 214, 229, 244, 245, 230,
215, 200, 185, 170, 155, 140, 125, 110, 95, 111, 126, 141, 156, 171, 186, 201,
216, 231, 246, 247, 232, 217, 202, 187, 172, 157, 142, 127, 143, 158, 173, 188,
203, 218, 233, 248, 249, 234, 219, 204, 189, 174, 159, 175, 190, 205, 220, 235,
250, 251, 236, 221, 206, 191, 207, 222, 237, 252, 253, 238, 223, 239, 254, 255,
};
/* Array indices are identical to previously-existing CONTEXT_NODE indices */
const vp9_tree_index vp9_coef_tree[ 22] = /* corresponding _CONTEXT_NODEs */
{
-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 */
};
struct vp9_token_struct vp9_coef_encodings[MAX_ENTROPY_TOKENS];
/* Trees for extra bits. Probabilities are constant and
do not depend on previously encoded bits */
static const Prob Pcat1[] = { 159};
static const Prob Pcat2[] = { 165, 145};
static const Prob Pcat3[] = { 173, 148, 140};
static const Prob Pcat4[] = { 176, 155, 140, 135};
static const Prob Pcat5[] = { 180, 157, 141, 134, 130};
static const Prob Pcat6[] =
{ 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129};
static vp9_tree_index cat1[2], cat2[4], cat3[6], cat4[8], cat5[10], cat6[26];
static void init_bit_tree(vp9_tree_index *p, int n) {
int i = 0;
while (++i < n) {
p[0] = p[1] = i << 1;
p += 2;
}
p[0] = p[1] = 0;
}
static 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, 13);
}
vp9_extra_bit_struct vp9_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, 13, 67},
{ 0, 0, 0, 0}
};
#include "default_coef_probs.h"
void vp9_default_coef_probs(VP9_COMMON *pc) {
vpx_memcpy(pc->fc.coef_probs, default_coef_probs,
sizeof(pc->fc.coef_probs));
vpx_memcpy(pc->fc.hybrid_coef_probs, default_hybrid_coef_probs,
sizeof(pc->fc.hybrid_coef_probs));
vpx_memcpy(pc->fc.coef_probs_8x8, default_coef_probs_8x8,
sizeof(pc->fc.coef_probs_8x8));
vpx_memcpy(pc->fc.hybrid_coef_probs_8x8, default_hybrid_coef_probs_8x8,
sizeof(pc->fc.hybrid_coef_probs_8x8));
vpx_memcpy(pc->fc.coef_probs_16x16, default_coef_probs_16x16,
sizeof(pc->fc.coef_probs_16x16));
vpx_memcpy(pc->fc.hybrid_coef_probs_16x16,
default_hybrid_coef_probs_16x16,
sizeof(pc->fc.hybrid_coef_probs_16x16));
}
void vp9_coef_tree_initialize() {
init_bit_trees();
vp9_tokens_from_tree(vp9_coef_encodings, vp9_coef_tree);
}
// #define COEF_COUNT_TESTING
#define COEF_COUNT_SAT 24
#define COEF_MAX_UPDATE_FACTOR 112
#define COEF_COUNT_SAT_KEY 24
#define COEF_MAX_UPDATE_FACTOR_KEY 112
#define COEF_COUNT_SAT_AFTER_KEY 24
#define COEF_MAX_UPDATE_FACTOR_AFTER_KEY 128
void vp9_adapt_coef_probs(VP9_COMMON *cm) {
int t, i, j, k, count;
unsigned int branch_ct[ENTROPY_NODES][2];
vp9_prob coef_probs[ENTROPY_NODES];
int update_factor; /* denominator 256 */
int factor;
int count_sat;
// printf("Frame type: %d\n", cm->frame_type);
if (cm->frame_type == KEY_FRAME) {
update_factor = COEF_MAX_UPDATE_FACTOR_KEY;
count_sat = COEF_COUNT_SAT_KEY;
} else if (cm->last_frame_type == KEY_FRAME) {
update_factor = COEF_MAX_UPDATE_FACTOR_AFTER_KEY; /* adapt quickly */
count_sat = COEF_COUNT_SAT_AFTER_KEY;
} else {
update_factor = COEF_MAX_UPDATE_FACTOR;
count_sat = COEF_COUNT_SAT;
}
#ifdef COEF_COUNT_TESTING
{
printf("static const unsigned int\ncoef_counts"
"[BLOCK_TYPES] [COEF_BANDS]"
"[PREV_COEF_CONTEXTS] [MAX_ENTROPY_TOKENS] = {\n");
for (i = 0; i < BLOCK_TYPES; ++i) {
printf(" {\n");
for (j = 0; j < COEF_BANDS; ++j) {
printf(" {\n");
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
printf(" {");
for (t = 0; t < MAX_ENTROPY_TOKENS; ++t)
printf("%d, ", cm->fc.coef_counts[i][j][k][t]);
printf("},\n");
}
printf(" },\n");
}
printf(" },\n");
}
printf("};\n");
printf("static const unsigned int\ncoef_counts_8x8"
"[BLOCK_TYPES_8X8] [COEF_BANDS]"
"[PREV_COEF_CONTEXTS] [MAX_ENTROPY_TOKENS] = {\n");
for (i = 0; i < BLOCK_TYPES_8X8; ++i) {
printf(" {\n");
for (j = 0; j < COEF_BANDS; ++j) {
printf(" {\n");
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
printf(" {");
for (t = 0; t < MAX_ENTROPY_TOKENS; ++t)
printf("%d, ", cm->fc.coef_counts_8x8[i][j][k][t]);
printf("},\n");
}
printf(" },\n");
}
printf(" },\n");
}
printf("};\n");
printf("static const unsigned int\nhybrid_coef_counts"
"[BLOCK_TYPES] [COEF_BANDS]"
"[PREV_COEF_CONTEXTS] [MAX_ENTROPY_TOKENS] = {\n");
for (i = 0; i < BLOCK_TYPES; ++i) {
printf(" {\n");
for (j = 0; j < COEF_BANDS; ++j) {
printf(" {\n");
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
printf(" {");
for (t = 0; t < MAX_ENTROPY_TOKENS; ++t)
printf("%d, ", cm->fc.hybrid_coef_counts[i][j][k][t]);
printf("},\n");
}
printf(" },\n");
}
printf(" },\n");
}
printf("};\n");
}
#endif
for (i = 0; i < BLOCK_TYPES; ++i)
for (j = 0; j < COEF_BANDS; ++j)
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
coef_probs, branch_ct, cm->fc.coef_counts [i][j][k],
256, 1);
for (t = 0; t < ENTROPY_NODES; ++t) {
int prob;
count = branch_ct[t][0] + branch_ct[t][1];
count = count > count_sat ? count_sat : count;
factor = (update_factor * count / count_sat);
prob = ((int)cm->fc.pre_coef_probs[i][j][k][t] * (256 - factor) +
(int)coef_probs[t] * factor + 128) >> 8;
if (prob <= 0) cm->fc.coef_probs[i][j][k][t] = 1;
else if (prob > 255) cm->fc.coef_probs[i][j][k][t] = 255;
else cm->fc.coef_probs[i][j][k][t] = prob;
}
}
for (i = 0; i < BLOCK_TYPES; ++i)
for (j = 0; j < COEF_BANDS; ++j)
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
coef_probs, branch_ct, cm->fc.hybrid_coef_counts [i][j][k],
256, 1);
for (t = 0; t < ENTROPY_NODES; ++t) {
int prob;
count = branch_ct[t][0] + branch_ct[t][1];
count = count > count_sat ? count_sat : count;
factor = (update_factor * count / count_sat);
prob = ((int)cm->fc.pre_hybrid_coef_probs[i][j][k][t] * (256 - factor) +
(int)coef_probs[t] * factor + 128) >> 8;
if (prob <= 0) cm->fc.hybrid_coef_probs[i][j][k][t] = 1;
else if (prob > 255) cm->fc.hybrid_coef_probs[i][j][k][t] = 255;
else cm->fc.hybrid_coef_probs[i][j][k][t] = prob;
}
}
for (i = 0; i < BLOCK_TYPES_8X8; ++i)
for (j = 0; j < COEF_BANDS; ++j)
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
coef_probs, branch_ct, cm->fc.coef_counts_8x8 [i][j][k],
256, 1);
for (t = 0; t < ENTROPY_NODES; ++t) {
int prob;
count = branch_ct[t][0] + branch_ct[t][1];
count = count > count_sat ? count_sat : count;
factor = (update_factor * count / count_sat);
prob = ((int)cm->fc.pre_coef_probs_8x8[i][j][k][t] * (256 - factor) +
(int)coef_probs[t] * factor + 128) >> 8;
if (prob <= 0) cm->fc.coef_probs_8x8[i][j][k][t] = 1;
else if (prob > 255) cm->fc.coef_probs_8x8[i][j][k][t] = 255;
else cm->fc.coef_probs_8x8[i][j][k][t] = prob;
}
}
for (i = 0; i < BLOCK_TYPES_8X8; ++i)
for (j = 0; j < COEF_BANDS; ++j)
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
coef_probs, branch_ct, cm->fc.hybrid_coef_counts_8x8 [i][j][k],
256, 1);
for (t = 0; t < ENTROPY_NODES; ++t) {
int prob;
count = branch_ct[t][0] + branch_ct[t][1];
count = count > count_sat ? count_sat : count;
factor = (update_factor * count / count_sat);
prob = ((int)cm->fc.pre_hybrid_coef_probs_8x8[i][j][k][t] *
(256 - factor) +
(int)coef_probs[t] * factor + 128) >> 8;
if (prob <= 0) cm->fc.hybrid_coef_probs_8x8[i][j][k][t] = 1;
else if (prob > 255) cm->fc.hybrid_coef_probs_8x8[i][j][k][t] = 255;
else cm->fc.hybrid_coef_probs_8x8[i][j][k][t] = prob;
}
}
for (i = 0; i < BLOCK_TYPES_16X16; ++i)
for (j = 0; j < COEF_BANDS; ++j)
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
coef_probs, branch_ct, cm->fc.coef_counts_16x16[i][j][k], 256, 1);
for (t = 0; t < ENTROPY_NODES; ++t) {
int prob;
count = branch_ct[t][0] + branch_ct[t][1];
count = count > count_sat ? count_sat : count;
factor = (update_factor * count / count_sat);
prob = ((int)cm->fc.pre_coef_probs_16x16[i][j][k][t] *
(256 - factor) +
(int)coef_probs[t] * factor + 128) >> 8;
if (prob <= 0) cm->fc.coef_probs_16x16[i][j][k][t] = 1;
else if (prob > 255) cm->fc.coef_probs_16x16[i][j][k][t] = 255;
else cm->fc.coef_probs_16x16[i][j][k][t] = prob;
}
}
for (i = 0; i < BLOCK_TYPES_16X16; ++i)
for (j = 0; j < COEF_BANDS; ++j)
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
coef_probs, branch_ct, cm->fc.hybrid_coef_counts_16x16[i][j][k], 256, 1);
for (t = 0; t < ENTROPY_NODES; ++t) {
int prob;
count = branch_ct[t][0] + branch_ct[t][1];
count = count > count_sat ? count_sat : count;
factor = (update_factor * count / count_sat);
prob = ((int)cm->fc.pre_hybrid_coef_probs_16x16[i][j][k][t] * (256 - factor) +
(int)coef_probs[t] * factor + 128) >> 8;
if (prob <= 0) cm->fc.hybrid_coef_probs_16x16[i][j][k][t] = 1;
else if (prob > 255) cm->fc.hybrid_coef_probs_16x16[i][j][k][t] = 255;
else cm->fc.hybrid_coef_probs_16x16[i][j][k][t] = prob;
}
}
}