ref: d308fd8225078c6331e8bc616c03e05a472d0579
dir: /vp9/common/vp9_prob.c/
/*
* Copyright (c) 2013 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 "vp9/common/vp9_prob.h"
const uint8_t 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
};
static unsigned int tree_merge_probs_impl(unsigned int i,
const vp9_tree_index *tree,
const vp9_prob *pre_probs,
const unsigned int *counts,
unsigned int count_sat,
unsigned int max_update,
vp9_prob *probs) {
const int l = tree[i];
const unsigned int left_count = (l <= 0)
? counts[-l]
: tree_merge_probs_impl(l, tree, pre_probs, counts,
count_sat, max_update, probs);
const int r = tree[i + 1];
const unsigned int right_count = (r <= 0)
? counts[-r]
: tree_merge_probs_impl(r, tree, pre_probs, counts,
count_sat, max_update, probs);
const unsigned int ct[2] = { left_count, right_count };
probs[i >> 1] = merge_probs(pre_probs[i >> 1], ct,
count_sat, max_update);
return left_count + right_count;
}
void vp9_tree_merge_probs(const vp9_tree_index *tree, const vp9_prob *pre_probs,
const unsigned int *counts, unsigned int count_sat,
unsigned int max_update_factor, vp9_prob *probs) {
tree_merge_probs_impl(0, tree, pre_probs, counts, count_sat,
max_update_factor, probs);
}