chromium/third_party/libaom/source/libaom/aom_dsp/entcode.c

/*
 * Copyright (c) 2001-2016, 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.
 */

#include "aom_dsp/entcode.h"

/*Given the current total integer number of bits used and the current value of
   rng, computes the fraction number of bits used to OD_BITRES precision.
  This is used by od_ec_enc_tell_frac() and od_ec_dec_tell_frac().
  nbits_total: The number of whole bits currently used, i.e., the value
                returned by od_ec_enc_tell() or od_ec_dec_tell().
  rng: The current value of rng from either the encoder or decoder state.
  Return: The number of bits scaled by 2**OD_BITRES.
          This will always be slightly larger than the exact value (e.g., all
           rounding error is in the positive direction).*/
uint32_t od_ec_tell_frac(uint32_t nbits_total, uint32_t rng) { … }