9fce131de8
Don't initialize first pass costs for a number of symbols where first pass probabilities aren't initialized. As a side effect, an illegal read in the ANS experiment is fixed. https://bugs.chromium.org/p/webm/issues/detail?id=1089 Change-Id: I97438c357bd88f52f5a15c697031cf0c3cc8f510
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/*
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* Copyright (c) 2014 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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#ifndef VP10_ENCODER_COST_H_
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#define VP10_ENCODER_COST_H_
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#include "vpx_dsp/prob.h"
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#include "vpx/vpx_integer.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern const uint16_t vp10_prob_cost[256];
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// The factor to scale from cost in bits to cost in vp10_prob_cost units.
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#define VP9_PROB_COST_SHIFT 9
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#define vp10_cost_zero(prob) (vp10_prob_cost[prob])
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#define vp10_cost_one(prob) vp10_cost_zero(256 - (prob))
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#define vp10_cost_bit(prob, bit) vp10_cost_zero((bit) ? 256 - (prob) \
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: (prob))
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static INLINE unsigned int cost_branch256(const unsigned int ct[2],
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vpx_prob p) {
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return ct[0] * vp10_cost_zero(p) + ct[1] * vp10_cost_one(p);
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}
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static INLINE int treed_cost(vpx_tree tree, const vpx_prob *probs,
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int bits, int len) {
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int cost = 0;
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vpx_tree_index i = 0;
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do {
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const int bit = (bits >> --len) & 1;
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cost += vp10_cost_bit(probs[i >> 1], bit);
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i = tree[i + bit];
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} while (len);
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return cost;
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}
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void vp10_cost_tokens(int *costs, const vpx_prob *probs, vpx_tree tree);
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void vp10_cost_tokens_skip(int *costs, const vpx_prob *probs, vpx_tree tree);
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#if CONFIG_ANS
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void vp10_cost_tokens_ans(int *costs, const vpx_prob *tree_probs,
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const vpx_prob *token_probs, int skip_eob);
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#endif
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // VP10_ENCODER_COST_H_
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