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/* license:BSD-3-Clause
* copyright-holders:Aaron Giles
***************************************************************************
bitstream.h
Helper classes for reading/writing at the bit level.
***************************************************************************/
#pragma once
#ifndef __BITSTREAM_H__
#define __BITSTREAM_H__
#include <stdint.h>
/***************************************************************************
* TYPE DEFINITIONS
***************************************************************************
*/
/* helper class for reading from a bit buffer */
struct bitstream
{
uint32_t buffer; /* current bit accumulator */
int bits; /* number of bits in the accumulator */
const uint8_t * read; /* read pointer */
uint32_t doffset; /* byte offset within the data */
uint32_t dlength; /* length of the data */
};
struct bitstream* create_bitstream(const void *src, uint32_t srclength);
int bitstream_overflow(struct bitstream* bitstream);
uint32_t bitstream_read_offset(struct bitstream* bitstream);
uint32_t bitstream_read(struct bitstream* bitstream, int numbits);
uint32_t bitstream_peek(struct bitstream* bitstream, int numbits);
void bitstream_remove(struct bitstream* bitstream, int numbits);
uint32_t bitstream_flush(struct bitstream* bitstream);
#endif
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