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/*
* 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 AOM_AOM_DSP_BITREADER_BUFFER_H_
#define AOM_AOM_DSP_BITREADER_BUFFER_H_
#include <limits.h>
#include "aom/aom_integer.h"
#include "config/aom_config.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef void (*aom_rb_error_handler)(void *data);
struct aom_read_bit_buffer {
const uint8_t *bit_buffer;
const uint8_t *bit_buffer_end;
uint32_t bit_offset;
void *error_handler_data;
aom_rb_error_handler error_handler;
};
size_t aom_rb_bytes_read(const struct aom_read_bit_buffer *rb);
int aom_rb_read_bit(struct aom_read_bit_buffer *rb);
int aom_rb_read_literal(struct aom_read_bit_buffer *rb, int bits);
// Reads a variable length unsigned integer. Valid range is 0..UINT32_MAX - 1.
// Returns UINT32_MAX if the input is too long (has 32 or more leading zero
// bits).
uint32_t aom_rb_read_uvlc(struct aom_read_bit_buffer *rb);
#if CONFIG_AV1_DECODER
uint32_t aom_rb_read_unsigned_literal(struct aom_read_bit_buffer *rb, int bits);
int aom_rb_read_inv_signed_literal(struct aom_read_bit_buffer *rb, int bits);
int16_t aom_rb_read_signed_primitive_refsubexpfin(
struct aom_read_bit_buffer *rb, uint16_t n, uint16_t k, int16_t ref);
#endif // CONFIG_AV1_DECODER
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AOM_DSP_BITREADER_BUFFER_H_
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