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/*
* 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 <assert.h>
#include "./vpx_config.h"
#include "vp9/common/vp9_treecoder.h"
static unsigned int convert_distribution(unsigned int i, vp9_tree tree,
unsigned int branch_ct[][2],
const unsigned int num_events[]) {
unsigned int left, right;
if (tree[i] <= 0)
left = num_events[-tree[i]];
else
left = convert_distribution(tree[i], tree, branch_ct, num_events);
if (tree[i + 1] <= 0)
right = num_events[-tree[i + 1]];
else
right = convert_distribution(tree[i + 1], tree, branch_ct, num_events);
branch_ct[i >> 1][0] = left;
branch_ct[i >> 1][1] = right;
return left + right;
}
void vp9_tree_probs_from_distribution(vp9_tree tree,
unsigned int branch_ct[/* n-1 */][2],
const unsigned int num_events[/* n */]) {
convert_distribution(0, tree, branch_ct, num_events);
}
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