/*
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*
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* Copyright 2015 Rockchip Electronics Co. LTD
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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* VPX RangeCoder dec (common features)
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*/
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#ifndef VPX_RAC_H
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#define VPX_RAC_H
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#include <stdint.h>
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#include <stdlib.h>
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#include "mpp_common.h"
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#define DECLARE_ALIGNED(n,t,v) t v
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typedef struct Vpxmv {
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DECLARE_ALIGNED(4, int16_t, x);
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int16_t y;
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} Vpxmv;
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typedef struct VpxRangeCoder {
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int high;
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int bits; /* stored negated (i.e. negative "bits" is a positive number of
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bits left) in order to eliminate a negate in cache refilling */
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const uint8_t *buffer;
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const uint8_t *end;
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unsigned int code_word;
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} VpxRangeCoder;
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/**
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* vp56 specific range coder implementation
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*/
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extern const uint8_t vpx_norm_shift[256];
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void vpx_init_range_decoder(VpxRangeCoder *c, const uint8_t *buf, int buf_size);
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unsigned int vpx_rac_renorm(VpxRangeCoder *c);
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int vpx_rac_get_prob(VpxRangeCoder *c, uint8_t prob);
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int vpx_rac_get_prob_branchy(VpxRangeCoder *c, int prob);
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// rounding is different than vpx_rac_get, is vpx_rac_get wrong?
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int vpx_rac_get(VpxRangeCoder *c);
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int vpx_rac_get_uint(VpxRangeCoder *c, int bits);
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#endif /* VPX_RAC_H */
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