53 lines
2.3 KiB
C
53 lines
2.3 KiB
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 "./prob.h"
|
|
|
|
const uint8_t vpx_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 vpx_tree_index *tree,
|
|
const vpx_prob *pre_probs,
|
|
const unsigned int *counts,
|
|
vpx_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, 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, probs);
|
|
const unsigned int ct[2] = { left_count, right_count };
|
|
probs[i >> 1] = mode_mv_merge_probs(pre_probs[i >> 1], ct);
|
|
return left_count + right_count;
|
|
}
|
|
|
|
void vpx_tree_merge_probs(const vpx_tree_index *tree, const vpx_prob *pre_probs,
|
|
const unsigned int *counts, vpx_prob *probs) {
|
|
tree_merge_probs_impl(0, tree, pre_probs, counts, probs);
|
|
}
|