mirror of
https://github.com/mozilla/gecko-dev.git
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8d3525293e
This updates our in-tree copy of libvpx to the v1.3.0 git tag (2e88f2f2ec777259bda1714e72f1ecd2519bceb5) libvpx 1.3.0 adds support for VP9. VP9 support is built but not yet exposed with this commit. Our update.sh script is replaced with update.py that can update the build system to a given git commit. - checkout out upstream git - create platform dependend config files - add/remove changed libvpx files - update moz.build - warn about new build categories in libvpx
65 lines
1.7 KiB
C
65 lines
1.7 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 <assert.h>
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#include "./vpx_config.h"
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#include "vp9/common/vp9_treecoder.h"
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static void tree2tok(struct vp9_token *const p, vp9_tree t,
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int i, int v, int l) {
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v += v;
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++l;
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do {
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const vp9_tree_index j = t[i++];
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if (j <= 0) {
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p[-j].value = v;
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p[-j].len = l;
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} else {
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tree2tok(p, t, j, v, l);
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}
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} while (++v & 1);
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}
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void vp9_tokens_from_tree(struct vp9_token *p, vp9_tree t) {
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tree2tok(p, t, 0, 0, 0);
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}
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static unsigned int convert_distribution(unsigned int i, vp9_tree tree,
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unsigned int branch_ct[][2],
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const unsigned int num_events[]) {
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unsigned int left, right;
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if (tree[i] <= 0)
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left = num_events[-tree[i]];
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else
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left = convert_distribution(tree[i], tree, branch_ct, num_events);
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if (tree[i + 1] <= 0)
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right = num_events[-tree[i + 1]];
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else
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right = convert_distribution(tree[i + 1], tree, branch_ct, num_events);
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branch_ct[i >> 1][0] = left;
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branch_ct[i >> 1][1] = right;
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return left + right;
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}
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void vp9_tree_probs_from_distribution(vp9_tree tree,
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unsigned int branch_ct[/* n-1 */][2],
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const unsigned int num_events[/* n */]) {
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convert_distribution(0, tree, branch_ct, num_events);
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}
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