bitstream.c File Reference

#include "bitstream.h"
#include <math.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include "kvz_math.h"

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Functions
void	kvz_bitstream_init (bitstream_t *const stream)
	Initialize a new bitstream.
kvz_data_chunk *	kvz_bitstream_take_chunks (bitstream_t *const stream)
	Take chunks from a bitstream.
kvz_data_chunk *	kvz_bitstream_alloc_chunk ()
	Allocates a new bitstream chunk.
void	kvz_bitstream_free_chunks (kvz_data_chunk *chunk)
	Free a list of chunks.
void	kvz_bitstream_finalize (bitstream_t *const stream)
	Free resources used by a bitstream.
uint64_t	kvz_bitstream_tell (const bitstream_t *const stream)
	Get the number of bits written.
void	kvz_bitstream_writebyte (bitstream_t *const stream, const uint8_t byte)
	Write a byte to bitstream.
void	kvz_bitstream_move (bitstream_t *const dst, bitstream_t *const src)
	Move data from one stream to another.
void	kvz_bitstream_clear (bitstream_t *const stream)
	Reset stream.
void	kvz_bitstream_put_byte (bitstream_t *const stream, uint32_t data)
	Write a byte to a byte aligned bitstream.
void	kvz_bitstream_put (bitstream_t *const stream, const uint32_t data, uint8_t bits)
	Write bits to bitstream Buffers individual bits untill they make a full byte.
void	kvz_bitstream_put_ue (bitstream_t *stream, uint32_t code_num)
	Write unsigned Exp-Golomb bit string.
void	kvz_bitstream_put_se (bitstream_t *stream, int32_t data)
	Write signed Exp-Golomb bit string.
void	kvz_bitstream_add_rbsp_trailing_bits (bitstream_t *const stream)
	Add rbsp_trailing_bits syntax element, which aligns the bitstream.
void	kvz_bitstream_align (bitstream_t *const stream)
	Align the bitstream, unless it's already aligned.
void	kvz_bitstream_align_zero (bitstream_t *const stream)
	Align the bitstream with zero.

Variables
const uint32_t	kvz_bit_set_mask []

Function Documentation

kvz_bitstream_add_rbsp_trailing_bits()

void kvz_bitstream_add_rbsp_trailing_bits

(

bitstream_t *const

stream

)

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kvz_bitstream_align()

void kvz_bitstream_align

(

bitstream_t *const

stream

)

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kvz_bitstream_align_zero()

void kvz_bitstream_align_zero

(

bitstream_t *const

stream

)

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kvz_bitstream_alloc_chunk()

kvz_data_chunk * kvz_bitstream_alloc_chunk

(

)

Returns

Pointer to the new chunk, or NULL.

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kvz_bitstream_clear()

void kvz_bitstream_clear

(

bitstream_t *const

stream

)

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kvz_bitstream_finalize()

void kvz_bitstream_finalize

(

bitstream_t *const

stream

)

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kvz_bitstream_free_chunks()

void kvz_bitstream_free_chunks

(

kvz_data_chunk *

chunk

)

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kvz_bitstream_init()

void kvz_bitstream_init

(

bitstream_t *const

stream

)

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kvz_bitstream_move()

void kvz_bitstream_move	(	bitstream_t *const	dst,
		bitstream_t *const	src
	)

Destination stream must be byte-aligned. Source stream will be cleared.

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kvz_bitstream_put()

void kvz_bitstream_put	(	bitstream_t *const	stream,
		const uint32_t	data,
		uint8_t	bits
	)

Parameters

stream	stream the data is to be appended to
data	input data
bits	number of bits to write from data to stream

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kvz_bitstream_put_byte()

void kvz_bitstream_put_byte	(	bitstream_t *const	stream,
		uint32_t	data
	)

Parameters

stream	stream the data is to be appended to
data	input data

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kvz_bitstream_put_se()

void kvz_bitstream_put_se	(	bitstream_t *	stream,
		int32_t	data
	)

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kvz_bitstream_put_ue()

void kvz_bitstream_put_ue	(	bitstream_t *	stream,
		uint32_t	code_num
	)

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kvz_bitstream_take_chunks()

kvz_data_chunk * kvz_bitstream_take_chunks

(

bitstream_t *const

stream

)

Move ownership of the chunks to the caller and clear the bitstream.

The bitstream must be byte-aligned.

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kvz_bitstream_tell()

uint64_t kvz_bitstream_tell

(

const bitstream_t *const

stream

)

Parameters

stream

bitstream

Returns

position

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kvz_bitstream_writebyte()

void kvz_bitstream_writebyte	(	bitstream_t *const	stream,
		const uint8_t	byte
	)

The stream must be byte-aligned.

Parameters

stream	pointer bitstream to put the data
byte	byte to write

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Variable Documentation

kvz_bit_set_mask

const uint32_t kvz_bit_set_mask[]

Initial value:

=
{
0x00000001,0x00000002,0x00000004,0x00000008,
0x00000010,0x00000020,0x00000040,0x00000080,
0x00000100,0x00000200,0x00000400,0x00000800,
0x00001000,0x00002000,0x00004000,0x00008000,
0x00010000,0x00020000,0x00040000,0x00080000,
0x00100000,0x00200000,0x00400000,0x00800000,
0x01000000,0x02000000,0x04000000,0x08000000,
0x10000000,0x20000000,0x40000000,0x80000000
}