chromium/third_party/libvpx/source/libvpx/vpx_dsp/bitreader.h

/*
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef VPX_VPX_DSP_BITREADER_H_
#define VPX_VPX_DSP_BITREADER_H_

#include <stddef.h>
#include <stdio.h>
#include <limits.h>

#include "./vpx_config.h"
#include "vpx_ports/mem.h"
#include "vpx/vp8dx.h"
#include "vpx/vpx_integer.h"
#include "vpx_dsp/prob.h"
#if CONFIG_BITSTREAM_DEBUG
#include "vpx_util/vpx_debug_util.h"
#endif  // CONFIG_BITSTREAM_DEBUG

#ifdef __cplusplus
extern "C" {
#endif

BD_VALUE;

#define BD_VALUE_SIZE …

// This is meant to be a large, positive constant that can still be efficiently
// loaded as an immediate (on platforms like ARM, for example).
// Even relatively modest values like 100 would work fine.
#define LOTS_OF_BITS …

vpx_reader;

int vpx_reader_init(vpx_reader *r, const uint8_t *buffer, size_t size,
                    vpx_decrypt_cb decrypt_cb, void *decrypt_state);

void vpx_reader_fill(vpx_reader *r);

const uint8_t *vpx_reader_find_end(vpx_reader *r);

static INLINE int vpx_reader_has_error(vpx_reader *r) { … }

static INLINE int vpx_read(vpx_reader *r, int prob) { … }

static INLINE int vpx_read_bit(vpx_reader *r) { … }

static INLINE int vpx_read_literal(vpx_reader *r, int bits) { … }

static INLINE int vpx_read_tree(vpx_reader *r, const vpx_tree_index *tree,
                                const vpx_prob *probs) { … }

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // VPX_VPX_DSP_BITREADER_H_