FFmpeg: libavcodec/dirac_vlc.c File Reference

FFmpeg 4.0

libavcodec

#include "dirac_vlc.h"

Go to the source code of this file.

Macros
#define	LUT_SIZE (1 << LUT_BITS)

#define	RSIZE_BITS (CHAR_BIT*sizeof(residual))

#define	CONVERT_TO_RESIDUE(a, b) (((residual)(a)) << (RSIZE_BITS - (b)))

#define	INIT_RESIDUE(N)

#define	SET_RESIDUE(N, I, B)

#define	APPEND_RESIDUE(N, M)

#define	READ_BIT(N) (((N) >> (N ## _count--)) & 1)

Functions
int	ff_dirac_golomb_read_32bit (DiracGolombLUT lut_ctx, const uint8_t buf, int bytes, uint8_t *_dst, int coeffs)

int	ff_dirac_golomb_read_16bit (DiracGolombLUT lut_ctx, const uint8_t buf, int bytes, uint8_t *_dst, int coeffs)

static void	search_for_golomb (DiracGolombLUT *l, residual r, int bits)

static void	generate_parity_lut (DiracGolombLUT *lut, int even)

static void	generate_offset_lut (DiracGolombLUT *lut, int off)

av_cold int	ff_dirac_golomb_reader_init (DiracGolombLUT **lut_ctx)

av_cold void	ff_dirac_golomb_reader_end (DiracGolombLUT **lut_ctx)

Macro Definition Documentation

◆ LUT_SIZE

#define LUT_SIZE (1 << LUT_BITS)

Definition at line 24 of file dirac_vlc.c.

Referenced by ff_dirac_golomb_read_16bit(), ff_dirac_golomb_read_32bit(), ff_dirac_golomb_reader_init(), generate_offset_lut(), and generate_parity_lut().

◆ RSIZE_BITS

#define RSIZE_BITS (CHAR_BIT*sizeof(residual))

Definition at line 25 of file dirac_vlc.c.

Referenced by ff_dirac_golomb_read_16bit(), ff_dirac_golomb_read_32bit(), generate_offset_lut(), generate_parity_lut(), and search_for_golomb().

◆ CONVERT_TO_RESIDUE

#define CONVERT_TO_RESIDUE	(		a,
			b
	)		(((residual)(a)) << (RSIZE_BITS - (b)))

Definition at line 27 of file dirac_vlc.c.

Referenced by generate_offset_lut(), and generate_parity_lut().

◆ INIT_RESIDUE

#define INIT_RESIDUE ( N )

Value:

residual N = 0; \

av_unused int32_t N ## _bits = 0

#define N

Definition: af_mcompand.c:54

uint64_t residual

Definition: dirac_vlc.h:29

int32_t

Definition: audio_convert.c:194

Definition at line 30 of file dirac_vlc.c.

Referenced by ff_dirac_golomb_read_16bit(), ff_dirac_golomb_read_32bit(), generate_offset_lut(), and generate_parity_lut().

◆ SET_RESIDUE

#define SET_RESIDUE	(		N,
			I,
			B
	)

Value:

N = CONVERT_TO_RESIDUE(I, B); \

N ## _bits = B

#define N

Definition: af_mcompand.c:54

#define B

Definition: huffyuvdsp.h:32

CONVERT_TO_RESIDUE

#define CONVERT_TO_RESIDUE(a, b)

Definition: dirac_vlc.c:27

Definition at line 34 of file dirac_vlc.c.

Referenced by generate_offset_lut(), and generate_parity_lut().

◆ APPEND_RESIDUE

#define APPEND_RESIDUE	(		N,
			M
	)

Value:

N |= M >> (N ## _bits); \

N ## _bits = (N ## _bits + (M ## _bits)) & 0x3F

#define N

Definition: af_mcompand.c:54

#define M(a, b)

Definition: vp3dsp.c:44

Definition at line 38 of file dirac_vlc.c.

Referenced by ff_dirac_golomb_read_16bit(), and ff_dirac_golomb_read_32bit().

◆ READ_BIT

#define READ_BIT ( N ) (((N) >> (N ## _count--)) & 1)

Referenced by search_for_golomb().

Function Documentation

◆ ff_dirac_golomb_read_32bit()

int ff_dirac_golomb_read_32bit	(	DiracGolombLUT *	lut_ctx,
		const uint8_t *	buf,
		int	bytes,
		uint8_t *	_dst,
		int	coeffs
	)

Definition at line 42 of file dirac_vlc.c.

Referenced by decode_hq_slice().

◆ ff_dirac_golomb_read_16bit()

int ff_dirac_golomb_read_16bit	(	DiracGolombLUT *	lut_ctx,
		const uint8_t *	buf,
		int	bytes,
		uint8_t *	_dst,
		int	coeffs
	)

Definition at line 82 of file dirac_vlc.c.

Referenced by decode_hq_slice().

◆ search_for_golomb()

static void search_for_golomb	(	DiracGolombLUT *	l,
		residual	r,
		int	bits
	)

inlinestatic

Definition at line 123 of file dirac_vlc.c.

Referenced by generate_offset_lut(), and generate_parity_lut().

◆ generate_parity_lut()

static void generate_parity_lut	(	DiracGolombLUT *	lut,
		int	even
	)

static

Definition at line 168 of file dirac_vlc.c.

Referenced by ff_dirac_golomb_reader_init().

◆ generate_offset_lut()

static void generate_offset_lut	(	DiracGolombLUT *	lut,
		int	off
	)

static

Definition at line 210 of file dirac_vlc.c.

Referenced by ff_dirac_golomb_reader_init().

◆ ff_dirac_golomb_reader_init()

av_cold int ff_dirac_golomb_reader_init ( DiracGolombLUT ** lut_ctx )

Definition at line 232 of file dirac_vlc.c.

Referenced by dirac_decode_init().

◆ ff_dirac_golomb_reader_end()

av_cold void ff_dirac_golomb_reader_end ( DiracGolombLUT ** lut_ctx )

Definition at line 249 of file dirac_vlc.c.

Referenced by dirac_decode_end().