tarkin/bitwise.h

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE.  *
   4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
   5  * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE.    *
   6  * PLEASE READ THESE TERMS DISTRIBUTING.                            *
   7  *                                                                  *
   8  * THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000             *
   9  * by Monty <monty@xiph.org> and The XIPHOPHORUS Company            *
  10  * http://www.xiph.org/                                             *
  11  *                                                                  *
  12  ********************************************************************
  13
  14   function: packing variable sized words into an octet stream
  15   last mod: $Id: bitwise.h,v 1.1 2001/02/13 01:06:24 giles Exp $
  16
  17  ********************************************************************/
  18
  19 #ifndef _V_BITW_H_
  20 #define _V_BITW_H_
  21
  22 typedef struct {
  23   long endbyte;
  24   int  endbit;
  25
  26   unsigned char *buffer;
  27   unsigned char *ptr;
  28   long storage;
  29
  30 } oggpack_buffer;
  31
  32 extern void  _oggpack_writeinit(oggpack_buffer *b);
  33 extern void  _oggpack_reset(oggpack_buffer *b);
  34 extern void  _oggpack_writeclear(oggpack_buffer *b);
  35 extern void  _oggpack_readinit(oggpack_buffer *b,char *buf,int bytes);
  36 extern void  _oggpack_write(oggpack_buffer *b,unsigned long value,int bits);
  37 extern long  _oggpack_look(oggpack_buffer *b,int bits);
  38 extern long  _oggpack_look1(oggpack_buffer *b);
  39 extern void  _oggpack_adv(oggpack_buffer *b,int bits);
  40 extern void  _oggpack_adv1(oggpack_buffer *b);
  41 extern long  _oggpack_read(oggpack_buffer *b,int bits);
  42 extern long  _oggpack_read1(oggpack_buffer *b);
  43 extern long  _oggpack_bytes(oggpack_buffer *b);
  44 extern long  _oggpack_bits(oggpack_buffer *b);
  45 extern char *_oggpack_buffer(oggpack_buffer *b);
  46
  47 #endif