av1/encoder/subexp.h

/*
 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
 *
 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
 */

#ifndef AV1_ENCODER_SUBEXP_H_
#define AV1_ENCODER_SUBEXP_H_

#ifdef __cplusplus
extern "C" {
#endif

#include "aom_dsp/prob.h"

struct aom_writer;

void av1_write_prob_diff_update(struct aom_writer *w, aom_prob newp,
                                aom_prob oldp);

void av1_cond_prob_diff_update(struct aom_writer *w, aom_prob *oldp,
                               const unsigned int ct[2]);

int av1_prob_diff_update_savings_search(const unsigned int *ct, aom_prob oldp,
                                        aom_prob *bestp, aom_prob upd);

int av1_prob_diff_update_savings_search_model(const unsigned int *ct,
                                              const aom_prob *oldp,
                                              aom_prob *bestp, aom_prob upd,
                                              int stepsize);
int av1_cond_prob_diff_update_savings(aom_prob *oldp, const unsigned int ct[2]);

#if CONFIG_ENTROPY
int av1_prob_update_search_subframe(unsigned int ct[][2], aom_prob oldp,
                                    aom_prob *bestp, aom_prob upd, int n);
int av1_prob_update_search_model_subframe(unsigned int ct[ENTROPY_NODES]
                                                         [COEF_PROBS_BUFS][2],
                                          const aom_prob *oldp, aom_prob *bestp,
                                          aom_prob upd, int stepsize, int n);
#endif  // CONFIG_ENTROPY

//
// mag_bits is number of bits for magnitude. The alphabet is of size
// 2 * 2^mag_bits + 1, symmetric around 0, where one bit is used to
// indicate 0 or non-zero, mag_bits bits are used to indicate magnitide
// and 1 more bit for the sign if non-zero.
void aom_write_primitive_symmetric(aom_writer *w, int word,
                                   unsigned int mag_bits);
#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // AV1_ENCODER_SUBEXP_H_