FFmpeg: libavcodec/rangecoder.c File Reference

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libavcodec

rangecoder.c File Reference

#include <string.h>
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/bswap.h"
#include "libavutil/intreadwrite.h"
#include "rangecoder.h"

Go to the source code of this file.

Functions

av_cold void ff_init_range_encoder (RangeCoder *c, uint8_t *buf, int buf_size)

av_cold void ff_init_range_decoder (RangeCoder *c, const uint8_t *buf, int buf_size)

void ff_build_rac_states (RangeCoder *c, int factor, int max_p)

int ff_rac_terminate (RangeCoder *c, int version)

Terminates the range coder. More...

Detailed Description

Range coder. based upon "Range encoding: an algorithm for removing redundancy from a digitised message. G. N. N. Martin Presented in March 1979 to the Video & Data Recording Conference, IBM UK Scientific Center held in Southampton July 24-27 1979."

Definition in file rangecoder.c.

Function Documentation

◆ ff_init_range_encoder()

av_cold void ff_init_range_encoder ( RangeCoder * c,

uint8_t * buf,

int buf_size

)

Definition at line 42 of file rangecoder.c.

Referenced by encode_frame(), ff_init_range_decoder(), main(), and write_extradata().

◆ ff_init_range_decoder()

av_cold void ff_init_range_decoder ( RangeCoder * c,

const uint8_t * buf,

int buf_size

)

Definition at line 53 of file rangecoder.c.

Referenced by decode_frame(), main(), mxf_parse_ffv1_frame(), and read_extra_header().

◆ ff_build_rac_states()

void ff_build_rac_states ( RangeCoder * c,

int factor,

int max_p

)

Definition at line 68 of file rangecoder.c.

Referenced by decode_frame(), encode_frame(), encode_init(), main(), mxf_parse_ffv1_frame(), read_extra_header(), and write_extradata().

◆ ff_rac_terminate()

int ff_rac_terminate ( RangeCoder * c,

int version

)

Terminates the range coder.

Parameters: version version 0 requires the decoder to know the data size in bytes version 1 needs about 1 bit more space but does not need to carry the size from encoder to decoder

Definition at line 109 of file rangecoder.c.

Referenced by encode_frame(), encode_slice(), main(), and write_extradata().

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