bitstream_util.cpp File Reference

#include "bitstream_util.hpp"
#include <array>
#include <cassert>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <new>

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Functions
void	uvg_bitstream_init (bitstream_t *const stream)
uvg_data_chunk *	uvg_bitstream_alloc_chunk ()
void	uvg_bitstream_free_chunks (uvg_data_chunk *chunk)
void	uvg_bitstream_writebyte (bitstream_t *const stream, const uint8_t byte)
	Write a byte to bitstream.
void	uvg_bitstream_put (bitstream_t *const stream, const uint32_t data, uint8_t bits)
uvg_data_chunk *	uvg_bitstream_take_chunks (bitstream_t *const stream)
void	uvg_bitstream_finalize (bitstream_t *const stream)
void	uvg_bitstream_clear (bitstream_t *const stream)
uint64_t	uvg_bitstream_tell (const bitstream_t *const stream)
void	uvg_bitstream_put_ue (bitstream_t *stream, uint32_t code_num)
size_t	uvg_calculate_ue_len (uint32_t number)
void	uvg_bitstream_add_rbsp_trailing_bits (bitstream_t *const stream)
void	uvg_bitstream_align (bitstream_t *const stream)
void	uvg_bitstream_move (bitstream_t *const dst, bitstream_t *const src)
void	uvg_bitstream_copy_bytes (bitstream_t *const stream, const uint8_t *bytes, uint32_t len)
	Copy array of bytes to a byte-aligned bitstream.
uint32_t	uvg_bitstream_peek_last_byte (bitstream_t *const stream)

Variables
const std::array< uint32_t, 32 >	uvg_bit_set_mask

Function Documentation

uvg_bitstream_add_rbsp_trailing_bits()

void uvg_bitstream_add_rbsp_trailing_bits

(

bitstream_t *const

stream

)

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uvg_bitstream_align()

void uvg_bitstream_align

(

bitstream_t *const

stream

)

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uvg_bitstream_alloc_chunk()

uvg_data_chunk * uvg_bitstream_alloc_chunk

(

)

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uvg_bitstream_clear()

void uvg_bitstream_clear

(

bitstream_t *const

stream

)

Reset stream.

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uvg_bitstream_copy_bytes()

void uvg_bitstream_copy_bytes	(	bitstream_t *const	stream,
		const uint8_t *	bytes,
		uint32_t	len
	)

Copy array of bytes to a byte-aligned bitstream.

Parameters

stream	pointer bitstream to put the data
bytes	bytes to copy
len	length of bytes array

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uvg_bitstream_finalize()

void uvg_bitstream_finalize

(

bitstream_t *const

stream

)

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uvg_bitstream_free_chunks()

void uvg_bitstream_free_chunks

(

uvg_data_chunk *

chunk

)

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uvg_bitstream_init()

void uvg_bitstream_init

(

bitstream_t *const

stream

)

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uvg_bitstream_move()

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

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uvg_bitstream_peek_last_byte()

uint32_t uvg_bitstream_peek_last_byte

(

bitstream_t *const

stream

)

uvg_bitstream_put()

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

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uvg_bitstream_put_ue()

void uvg_bitstream_put_ue	(	bitstream_t *	stream,
		uint32_t	code_num
	)

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uvg_bitstream_take_chunks()

uvg_data_chunk * uvg_bitstream_take_chunks

(

bitstream_t *const

stream

)

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uvg_bitstream_tell()

uint64_t uvg_bitstream_tell

(

const bitstream_t *const

stream

)

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uvg_bitstream_writebyte()

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

Write a byte to bitstream.

The stream must be byte-aligned.

Parameters

stream	pointer bitstream to put the data
byte	byte to write

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uvg_calculate_ue_len()

size_t uvg_calculate_ue_len

(

uint32_t

number

)

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Variable Documentation

uvg_bit_set_mask

const std::array<uint32_t, 32> uvg_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}