FFmpeg: libavutil/hdr_dynamic_metadata.h File Reference

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Data Structures | Macros | Enumerations | Functions

hdr_dynamic_metadata.h File Reference

#include "frame.h"
#include "rational.h"

Go to the source code of this file.

Data Structures

struct AVHDRPlusPercentile

Represents the percentile at a specific percentage in a distribution. More...

struct AVHDRPlusColorTransformParams

Color transform parameters at a processing window in a dynamic metadata for SMPTE 2094-40. More...

struct AVDynamicHDRPlus

This struct represents dynamic metadata for color volume transform - application 4 of SMPTE 2094-40:2016 standard. More...

Macros

#define AV_HDR_PLUS_MAX_PAYLOAD_SIZE 907

Enumerations

enum AVHDRPlusOverlapProcessOption { AV_HDR_PLUS_OVERLAP_PROCESS_WEIGHTED_AVERAGING = 0, AV_HDR_PLUS_OVERLAP_PROCESS_LAYERING = 1 }

Option for overlapping elliptical pixel selectors in an image. More...

Functions

AVDynamicHDRPlus * av_dynamic_hdr_plus_alloc (size_t *size)

Allocate an AVDynamicHDRPlus structure and set its fields to default values. More...

AVDynamicHDRPlus * av_dynamic_hdr_plus_create_side_data (AVFrame *frame)

Allocate a complete AVDynamicHDRPlus and add it to the frame. More...

int av_dynamic_hdr_plus_from_t35 (AVDynamicHDRPlus *s, const uint8_t *data, size_t size)

Parse the user data registered ITU-T T.35 to AVbuffer (AVDynamicHDRPlus). More...

int av_dynamic_hdr_plus_to_t35 (const AVDynamicHDRPlus *s, uint8_t **data, size_t *size)

Serialize dynamic HDR10+ metadata to a user data registered ITU-T T.35 buffer, excluding the first 48 bytes of the header, and beginning with the application mode. More...

Macro Definition Documentation

◆ AV_HDR_PLUS_MAX_PAYLOAD_SIZE

#define AV_HDR_PLUS_MAX_PAYLOAD_SIZE 907

Definition at line 356 of file hdr_dynamic_metadata.h.

Enumeration Type Documentation

◆ AVHDRPlusOverlapProcessOption

enum AVHDRPlusOverlapProcessOption

Option for overlapping elliptical pixel selectors in an image.

Enumerator
AV_HDR_PLUS_OVERLAP_PROCESS_WEIGHTED_AVERAGING
AV_HDR_PLUS_OVERLAP_PROCESS_LAYERING

Definition at line 30 of file hdr_dynamic_metadata.h.

Function Documentation

◆ av_dynamic_hdr_plus_alloc()

AVDynamicHDRPlus* av_dynamic_hdr_plus_alloc ( size_t * size )

Allocate an AVDynamicHDRPlus structure and set its fields to default values.

The resulting struct can be freed using av_freep().

Returns: An AVDynamicHDRPlus filled with default values or NULL on failure.

Definition at line 36 of file hdr_dynamic_metadata.c.

◆ av_dynamic_hdr_plus_create_side_data()

AVDynamicHDRPlus* av_dynamic_hdr_plus_create_side_data ( AVFrame * frame )

Allocate a complete AVDynamicHDRPlus and add it to the frame.

Parameters: frame The frame which side data is added to.

Returns: The AVDynamicHDRPlus structure to be filled by caller or NULL on failure.

Definition at line 48 of file hdr_dynamic_metadata.c.

Referenced by export_itut_t35(), and libdav1d_receive_frame().

◆ av_dynamic_hdr_plus_from_t35()

int av_dynamic_hdr_plus_from_t35 ( AVDynamicHDRPlus * s,

const uint8_t * data,

size_t size

)

Parse the user data registered ITU-T T.35 to AVbuffer (AVDynamicHDRPlus).

The T.35 buffer must begin with the application mode, skipping the country code, terminal provider codes, and application identifier.

Parameters: s A pointer containing the decoded AVDynamicHDRPlus structure.

data The byte array containing the raw ITU-T T.35 data.

size Size of the data array in bytes.

Returns: >= 0 on success. Otherwise, returns the appropriate AVERROR.

Definition at line 61 of file hdr_dynamic_metadata.c.

Referenced by export_itut_t35(), and libdav1d_receive_frame().

◆ av_dynamic_hdr_plus_to_t35()

int av_dynamic_hdr_plus_to_t35 ( const AVDynamicHDRPlus * s,

uint8_t ** data,

size_t * size

)

Serialize dynamic HDR10+ metadata to a user data registered ITU-T T.35 buffer, excluding the first 48 bytes of the header, and beginning with the application mode.

Parameters: s A pointer containing the decoded AVDynamicHDRPlus structure.

[in,out] data A pointer to pointer to a byte buffer to be filled with the serialized metadata. If *data is NULL, a buffer be will be allocated and a pointer to it stored in its place. The caller assumes ownership of the buffer. May be NULL, in which case the function will only store the required buffer size in *size.

[in,out] size A pointer to a size to be set to the returned buffer's size. If *data is not NULL, *size must contain the size of the input buffer. May be NULL only if *data is NULL.

Returns: >= 0 on success. Otherwise, returns the appropriate AVERROR.

Buffer size per CTA-861-H p.253-254: 48 header bits (excluded from the serialized payload) 8 bits for application_mode 2 bits for num_windows 153 bits for window geometry, for each window above 1 27 bits for targeted_system_display_maximum_luminance 1-2511 bits for targeted system display peak luminance information 82-442 bits per window for pixel distribution information 1-2511 bits for mastering display peak luminance information 1-179 bits per window for tonemapping information 1-7 bits per window for color saturation mapping information Total: 123-7249 bits, excluding trimmed header bits

Definition at line 239 of file hdr_dynamic_metadata.c.

Referenced by mkv_write_block().

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