• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  *  Copyright (c) 2010 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 
12 /****************************************************************************
13 *
14 *   Module Title :     boolhuff.h
15 *
16 *   Description  :     Bool Coder header file.
17 *
18 ****************************************************************************/
19 #ifndef __INC_BOOLHUFF_H
20 #define __INC_BOOLHUFF_H
21 
22 
23 typedef struct
24 {
25     unsigned int lowvalue;
26     unsigned int range;
27     unsigned int value;
28     int count;
29     unsigned int pos;
30     unsigned char *buffer;
31 
32     // Variables used to track bit costs without outputing to the bitstream
33     unsigned int  measure_cost;
34     unsigned long bit_counter;
35 } BOOL_CODER;
36 
37 extern void vp8_start_encode(BOOL_CODER *bc, unsigned char *buffer);
38 extern void vp8_encode_bool(BOOL_CODER *bc, int x, int context);
39 extern void vp8_encode_value(BOOL_CODER *br, int data, int bits);
40 extern void vp8_stop_encode(BOOL_CODER *bc);
41 extern const unsigned int vp8_prob_cost[256];
42 
43 #endif
44