jpegxl_probe.c File Reference

#include "jpegxl_probe.h"
#include "libavcodec/get_bits.h"

Go to the source code of this file.

Macros
#define	UNCHECKED_BITSTREAM_READER   0
#define	BITSTREAM_READER_LE

Enumerations
enum	JpegXLExtraChannelType {   FF_JPEGXL_CT_ALPHA = 0, FF_JPEGXL_CT_DEPTH, FF_JPEGXL_CT_SPOT_COLOR, FF_JPEGXL_CT_SELECTION_MASK,   FF_JPEGXL_CT_BLACK, FF_JPEGXL_CT_CFA, FF_JPEGXL_CT_THERMAL, FF_JPEGXL_CT_NON_OPTIONAL = 15,   FF_JPEGXL_CT_OPTIONAL }
enum	JpegXLColorSpace { FF_JPEGXL_CS_RGB = 0, FF_JPEGXL_CS_GRAY, FF_JPEGXL_CS_XYB, FF_JPEGXL_CS_UNKNOWN }
enum	JpegXLWhitePoint { FF_JPEGXL_WP_D65 = 1, FF_JPEGXL_WP_CUSTOM, FF_JPEGXL_WP_E = 10, FF_JPEGXL_WP_DCI = 11 }
enum	JpegXLPrimaries { FF_JPEGXL_PR_SRGB = 1, FF_JPEGXL_PR_CUSTOM, FF_JPEGXL_PR_2100 = 9, FF_JPEGXL_PR_P3 = 11 }

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	jpegxl_u64 (GetBitContext *gb)
static uint32_t	jpegxl_width_from_ratio (uint32_t height, int ratio)
static int	jpegxl_read_size_header (GetBitContext *gb)
	validate a Jpeg XL Size Header More...
static int	jpegxl_read_preview_header (GetBitContext *gb)
	validate a Jpeg XL Preview Header More...
static void	jpegxl_skip_bit_depth (GetBitContext *gb)
	skip a Jpeg XL BitDepth Header. More...
static int	jpegxl_read_extra_channel_info (GetBitContext *gb, int validate_level)
	validate a Jpeg XL Extra Channel Info bundle More...
int	ff_jpegxl_verify_codestream_header (const uint8_t *buf, int buflen, int validate_level)
	verify that a codestream header is valid More...

Macro Definition Documentation

UNCHECKED_BITSTREAM_READER

#define UNCHECKED_BITSTREAM_READER   0

Definition at line 24 of file jpegxl_probe.c.

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 25 of file jpegxl_probe.c.

Enumeration Type Documentation

JpegXLExtraChannelType

enum JpegXLExtraChannelType

Enumerator
FF_JPEGXL_CT_ALPHA
FF_JPEGXL_CT_DEPTH
FF_JPEGXL_CT_SPOT_COLOR
FF_JPEGXL_CT_SELECTION_MASK
FF_JPEGXL_CT_BLACK
FF_JPEGXL_CT_CFA
FF_JPEGXL_CT_THERMAL
FF_JPEGXL_CT_NON_OPTIONAL
FF_JPEGXL_CT_OPTIONAL

Definition at line 28 of file jpegxl_probe.c.

JpegXLColorSpace

enum JpegXLColorSpace

Enumerator
FF_JPEGXL_CS_RGB
FF_JPEGXL_CS_GRAY
FF_JPEGXL_CS_XYB
FF_JPEGXL_CS_UNKNOWN

Definition at line 40 of file jpegxl_probe.c.

JpegXLWhitePoint

enum JpegXLWhitePoint

Enumerator
FF_JPEGXL_WP_D65
FF_JPEGXL_WP_CUSTOM
FF_JPEGXL_WP_E
FF_JPEGXL_WP_DCI

Definition at line 47 of file jpegxl_probe.c.

JpegXLPrimaries

enum JpegXLPrimaries

Enumerator
FF_JPEGXL_PR_SRGB
FF_JPEGXL_PR_CUSTOM
FF_JPEGXL_PR_2100
FF_JPEGXL_PR_P3

Definition at line 54 of file jpegxl_probe.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 62 of file jpegxl_probe.c.

Referenced by ff_jpegxl_verify_codestream_header(), jpegxl_read_extra_channel_info(), jpegxl_read_preview_header(), jpegxl_read_size_header(), jpegxl_skip_bit_depth(), and jxl_enum().

jxl_enum()

static av_always_inline uint32_t jxl_enum ( GetBitContext *  gb )

static

Definition at line 77 of file jpegxl_probe.c.

Referenced by ff_jpegxl_verify_codestream_header(), and jpegxl_read_extra_channel_info().

jpegxl_u64()

static uint64_t jpegxl_u64 ( GetBitContext *  gb )

static

Definition at line 83 of file jpegxl_probe.c.

Referenced by ff_jpegxl_verify_codestream_header().

jpegxl_width_from_ratio()

static uint32_t jpegxl_width_from_ratio ( uint32_t  height, int  ratio  )

static

Definition at line 114 of file jpegxl_probe.c.

Referenced by jpegxl_read_preview_header(), and jpegxl_read_size_header().

jpegxl_read_size_header()

static int jpegxl_read_size_header ( GetBitContext *  gb )

static

validate a Jpeg XL Size Header

Returns

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

Definition at line 143 of file jpegxl_probe.c.

Referenced by ff_jpegxl_verify_codestream_header().

jpegxl_read_preview_header()

static int jpegxl_read_preview_header ( GetBitContext *  gb )

static

validate a Jpeg XL Preview Header

Returns

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

Definition at line 171 of file jpegxl_probe.c.

Referenced by ff_jpegxl_verify_codestream_header().

jpegxl_skip_bit_depth()

static void jpegxl_skip_bit_depth ( GetBitContext *  gb )

static

skip a Jpeg XL BitDepth Header.

These cannot be invalid.

Definition at line 197 of file jpegxl_probe.c.

Referenced by ff_jpegxl_verify_codestream_header(), and jpegxl_read_extra_channel_info().

jpegxl_read_extra_channel_info()

static int jpegxl_read_extra_channel_info ( GetBitContext *  gb, int  validate_level  )

static

validate a Jpeg XL Extra Channel Info bundle

Returns

>= 0 upon valid, < 0 upon invalid

Definition at line 213 of file jpegxl_probe.c.

Referenced by ff_jpegxl_verify_codestream_header().

ff_jpegxl_verify_codestream_header()

int ff_jpegxl_verify_codestream_header	(	const uint8_t *	buf,
		int	buflen,
		int	validate_level
	)

verify that a codestream header is valid

Returns

Negative upon error, 0 upon verifying that the codestream is not animated, and 1 upon verifying that it is animated

Definition at line 247 of file jpegxl_probe.c.

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