chromium/third_party/dav1d/libdav1d/src/getbits.c

/*
 * Copyright © 2018, VideoLAN and dav1d authors
 * Copyright © 2018, Two Orioles, LLC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"

#include <limits.h>

#include "common/intops.h"

#include "src/getbits.h"

void dav1d_init_get_bits(GetBits *const c, const uint8_t *const data,
                         const size_t sz)
{ … }

unsigned dav1d_get_bit(GetBits *const c) { … }

static inline void refill(GetBits *const c, const int n) { … }

#define GET_BITS(name, type, type64) …

GET_BITS(…)
GET_BITS(…)

unsigned dav1d_get_uleb128(GetBits *const c) { … }

unsigned dav1d_get_uniform(GetBits *const c, const unsigned max) { … }

unsigned dav1d_get_vlc(GetBits *const c) { … }

static unsigned get_bits_subexp_u(GetBits *const c, const unsigned ref,
                                  const unsigned n)
{ … }

int dav1d_get_bits_subexp(GetBits *const c, const int ref, const unsigned n) { … }