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 VP9_DECODER_VP9_READ_BIT_BUFFER_H_
12 #define VP9_DECODER_VP9_READ_BIT_BUFFER_H_
13 
14 #include <limits.h>
15 
16 #include "vpx/vpx_integer.h"
17 
18 #ifdef __cplusplus
19 extern "C" {
20 #endif
21 
22 typedef void (*vp9_rb_error_handler)(void *data);
23 
24 struct vp9_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   vp9_rb_error_handler error_handler;
31 };
32 
33 size_t vp9_rb_bytes_read(struct vp9_read_bit_buffer *rb);
34 
35 int vp9_rb_read_bit(struct vp9_read_bit_buffer *rb);
36 
37 int vp9_rb_read_literal(struct vp9_read_bit_buffer *rb, int bits);
38 
39 int vp9_rb_read_signed_literal(struct vp9_read_bit_buffer *rb, int bits);
40 
41 #ifdef __cplusplus
42 }  // extern "C"
43 #endif
44 
45 #endif  // VP9_DECODER_VP9_READ_BIT_BUFFER_H_
46