jpegxl_parse.c File Reference

#include <stdint.h>
#include "bytestream.h"
#include "get_bits.h"
#include "jpegxl.h"
#include "jpegxl_parse.h"

Go to the source code of this file.

Macros
#define	UNCHECKED_BITSTREAM_READER   0
#define	BITSTREAM_READER_LE

Functions
static av_always_inline uint32_t	jxl_u32 (GetBitContext *gb, uint32_t c0, uint32_t c1, uint32_t c2, uint32_t c3, uint32_t u0, uint32_t u1, uint32_t u2, uint32_t u3)
static av_always_inline uint32_t	jxl_enum (GetBitContext *gb)
static uint64_t	jxl_u64 (GetBitContext *gb)
static uint32_t	jpegxl_width_from_ratio (uint32_t height, int ratio)
static int	jpegxl_read_size_header (GetBitContext *gb, FFJXLMetadata *meta, int validate)
	validate a Jpeg XL Size Header More...
static int	jpegxl_read_preview_header (GetBitContext *gb, int validate)
	validate a Jpeg XL Preview Header More...
static void	jpegxl_get_bit_depth (GetBitContext *gb, FFJXLMetadata *meta)
	get a Jpeg XL BitDepth Header. More...
static int	jpegxl_read_extra_channel_info (GetBitContext *gb, FFJXLMetadata *meta, int validate)
	validate a Jpeg XL Extra Channel Info bundle More...
static int	jpegxl_skip_extensions (GetBitContext *gb)
int	ff_jpegxl_parse_codestream_header (const uint8_t *buf, int buflen, FFJXLMetadata *meta, int validate)
int	ff_jpegxl_collect_codestream_header (const uint8_t *input_buffer, int input_len, uint8_t *buffer, int buflen, int *copied)

Macro Definition Documentation

UNCHECKED_BITSTREAM_READER

#define UNCHECKED_BITSTREAM_READER   0

Definition at line 25 of file jpegxl_parse.c.

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 26 of file jpegxl_parse.c.

Function Documentation

jxl_u32()

static av_always_inline uint32_t jxl_u32 ( GetBitContext *  gb, uint32_t  c0, uint32_t  c1, uint32_t  c2, uint32_t  c3, uint32_t  u0, uint32_t  u1, uint32_t  u2, uint32_t  u3  )

static

Definition at line 32 of file jpegxl_parse.c.

Referenced by ff_jpegxl_parse_codestream_header(), jpegxl_get_bit_depth(), jpegxl_read_extra_channel_info(), jpegxl_read_preview_header(), jpegxl_read_size_header(), and jxl_enum().

jxl_enum()

static av_always_inline uint32_t jxl_enum ( GetBitContext *  gb )

static

Definition at line 47 of file jpegxl_parse.c.

Referenced by ff_jpegxl_parse_codestream_header(), and jpegxl_read_extra_channel_info().

jxl_u64()

static uint64_t jxl_u64 ( GetBitContext *  gb )

static

Definition at line 53 of file jpegxl_parse.c.

Referenced by jpegxl_skip_extensions().

jpegxl_width_from_ratio()

static uint32_t jpegxl_width_from_ratio ( uint32_t  height, int  ratio  )

static

Definition at line 83 of file jpegxl_parse.c.

Referenced by jpegxl_read_preview_header(), and jpegxl_read_size_header().

jpegxl_read_size_header()

static int jpegxl_read_size_header ( GetBitContext *  gb, FFJXLMetadata *  meta, int  validate  )

static

validate a Jpeg XL Size Header

Returns

>= 0 upon valid size, < 0 upon invalid size found

Definition at line 112 of file jpegxl_parse.c.

Referenced by ff_jpegxl_parse_codestream_header().

jpegxl_read_preview_header()

static int jpegxl_read_preview_header ( GetBitContext *  gb, int  validate  )

static

validate a Jpeg XL Preview Header

Returns

>= 0 upon valid size, < 0 upon invalid size found

Definition at line 145 of file jpegxl_parse.c.

Referenced by ff_jpegxl_parse_codestream_header().

jpegxl_get_bit_depth()

static void jpegxl_get_bit_depth ( GetBitContext *  gb, FFJXLMetadata *  meta  )

static

get a Jpeg XL BitDepth Header.

These cannot be invalid.

Definition at line 171 of file jpegxl_parse.c.

Referenced by ff_jpegxl_parse_codestream_header(), and jpegxl_read_extra_channel_info().

jpegxl_read_extra_channel_info()

static int jpegxl_read_extra_channel_info ( GetBitContext *  gb, FFJXLMetadata *  meta, int  validate  )

static

validate a Jpeg XL Extra Channel Info bundle

Returns

>= 0 upon valid, < 0 upon invalid

Definition at line 190 of file jpegxl_parse.c.

Referenced by ff_jpegxl_parse_codestream_header().

jpegxl_skip_extensions()

static int jpegxl_skip_extensions ( GetBitContext *  gb )

static

Definition at line 230 of file jpegxl_parse.c.

Referenced by ff_jpegxl_parse_codestream_header().

ff_jpegxl_parse_codestream_header()

int ff_jpegxl_parse_codestream_header	(	const uint8_t *	buf,
		int	buflen,
		FFJXLMetadata *	meta,
		int	validate
	)

Definition at line 255 of file jpegxl_parse.c.

Referenced by jpegxl_anim_probe(), jpegxl_anim_read_header(), jpegxl_probe(), and try_parse().

ff_jpegxl_collect_codestream_header()

int ff_jpegxl_collect_codestream_header	(	const uint8_t *	input_buffer,
		int	input_len,
		uint8_t *	buffer,
		int	buflen,
		int *	copied
	)

Definition at line 449 of file jpegxl_parse.c.

Referenced by jpegxl_anim_probe(), jpegxl_anim_read_header(), and try_parse().