57d953479b
Using contextual coding of the mkb_skip_coeff flag using the values of this flag from the left and above. There is a small improvement of about 0.15% on Derf: http://www.corp.google.com/~debargha/vp8_results/mbskipcontext.html Refactored to use pred_common.c by adding a new context type. Results on HD set (about 0.66% improvement): http://www.corp.google.com/~debargha/vp8_results/mbskipcontext_hd.html Incliding missing refactoring to use the pred_common utilities. Change-Id: I95373382d429b5a59610d77f69a0fea2be628278
45 lines
983 B
C
45 lines
983 B
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 "treewriter.h"
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static void cost(
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int *const C,
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vp8_tree T,
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const vp8_prob *const P,
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int i,
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int c
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)
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{
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const vp8_prob p = P [i>>1];
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do
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{
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const vp8_tree_index j = T[i];
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const int d = c + vp8_cost_bit(p, i & 1);
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if (j <= 0)
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C[-j] = d;
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else
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cost(C, T, P, j, d);
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}
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while (++i & 1);
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}
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void vp8_cost_tokens(int *c, const vp8_prob *p, vp8_tree t)
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{
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cost(c, t, p, 0, 0);
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}
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void vp8_cost_tokens_skip(int *c, const vp8_prob *p, vp8_tree t)
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{
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cost(c, t, p, 2, 0);
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}
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