bitreader_buffer.h revision 7ce0a1d1337c01056ba24006efab21f00e179e04 
1/*
2 *  Copyright (c) 2013 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef VPX_DSP_BITREADER_BUFFER_H_
12#define VPX_DSP_BITREADER_BUFFER_H_
13
14#include <limits.h>
15
16#include "vpx/vpx_integer.h"
17
18#ifdef __cplusplus
19extern "C" {
20#endif
21
22typedef void (*vpx_rb_error_handler)(void *data);
23
24struct vpx_read_bit_buffer {
25  const uint8_t *bit_buffer;
26  const uint8_t *bit_buffer_end;
27  size_t bit_offset;
28
29  void *error_handler_data;
30  vpx_rb_error_handler error_handler;
31};
32
33size_t vpx_rb_bytes_read(struct vpx_read_bit_buffer *rb);
34
35int vpx_rb_read_bit(struct vpx_read_bit_buffer *rb);
36
37int vpx_rb_read_literal(struct vpx_read_bit_buffer *rb, int bits);
38
39int vpx_rb_read_signed_literal(struct vpx_read_bit_buffer *rb, int bits);
40
41#ifdef __cplusplus
42}  // extern "C"
43#endif
44
45#endif  // VPX_DSP_BITREADER_BUFFER_H_
46