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avutil: introduce AVAmbientViewingEnvironment side data

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This enables exposing H.274 Ambient Viewing Environment
metadata in the framework.
This commit is contained in:
Jan Ekström
2023-01-10 20:47:53 +02:00
parent f4bebc0c34
commit 002d0ec740
7 changed files with 136 additions and 1 deletions
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6
doc/APIchanges
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@@ -14,6 +14,12 @@ libavutil: 2021-04-27
API changes, most recent first:
2023-01-13 - xxxxxxxxxx - lavu 57.44.100 - ambient_viewing_environment.h frame.h
Adds a new structure for holding H.274 Ambient Viewing Environment metadata,
AVAmbientViewingEnvironment.
Adds a new AVFrameSideDataType entry AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT
for it.
2022-12-xx - xxxxxxxxxx - lavc 59.55.100 - avcodec.h
Add AV_HWACCEL_FLAG_UNSAFE_OUTPUT.

2
libavutil/Makefile
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@@ -4,6 +4,7 @@ DESC = FFmpeg utility library
HEADERS = adler32.h \
aes.h \
aes_ctr.h \
ambient_viewing_environment.h \
attributes.h \
audio_fifo.h \
avassert.h \
@@ -102,6 +103,7 @@ BUILT_HEADERS = avconfig.h \
OBJS = adler32.o \
aes.o \
aes_ctr.o \
ambient_viewing_environment.o \
audio_fifo.o \
avstring.o \
avsscanf.o \

49
libavutil/ambient_viewing_environment.c Normal file
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@@ -0,0 +1,49 @@
/*
* Copyright (c) 2023 Jan Ekström <jeebjp@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "ambient_viewing_environment.h"
#include "mem.h"
AVAmbientViewingEnvironment *av_ambient_viewing_environment_alloc(size_t *size)
{
AVAmbientViewingEnvironment *env =
av_mallocz(sizeof(AVAmbientViewingEnvironment));
if (!env)
return NULL;
if (size)
*size = sizeof(*env);
return env;
}
AVAmbientViewingEnvironment *av_ambient_viewing_environment_create_side_data(AVFrame *frame)
{
AVFrameSideData *side_data =
av_frame_new_side_data(frame,
AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT,
sizeof(AVAmbientViewingEnvironment));
if (!side_data)
return NULL;
memset(side_data->data, 0, side_data->size);
return (AVAmbientViewingEnvironment *)side_data->data;
}

72
libavutil/ambient_viewing_environment.h Normal file
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@@ -0,0 +1,72 @@
/*
* Copyright (c) 2023 Jan Ekström <jeebjp@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H
#define AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H
#include <stddef.h>
#include "frame.h"
#include "rational.h"
/**
* Ambient viewing environment metadata as defined by H.274. The values are
* saved in AVRationals so that they keep their exactness, while allowing for
* easy access to a double value with f.ex. av_q2d.
*
* @note sizeof(AVAmbientViewingEnvironment) is not part of the public ABI, and
* it must be allocated using av_ambient_viewing_environment_alloc.
*/
typedef struct AVAmbientViewingEnvironment {
/**
* Environmental illuminance of the ambient viewing environment in lux.
*/
AVRational ambient_illuminance;
/**
* Normalized x chromaticity coordinate of the environmental ambient light
* in the nominal viewing environment according to the CIE 1931 definition
* of x and y as specified in ISO/CIE 11664-1.
*/
AVRational ambient_light_x;
/**
* Normalized y chromaticity coordinate of the environmental ambient light
* in the nominal viewing environment according to the CIE 1931 definition
* of x and y as specified in ISO/CIE 11664-1.
*/
AVRational ambient_light_y;
} AVAmbientViewingEnvironment;
/**
* Allocate an AVAmbientViewingEnvironment structure.
*
* @return the newly allocated struct or NULL on failure
*/
AVAmbientViewingEnvironment *av_ambient_viewing_environment_alloc(size_t *size);
/**
* Allocate and add an AVAmbientViewingEnvironment structure to an existing
* AVFrame as side data.
*
* @return the newly allocated struct, or NULL on failure
*/
AVAmbientViewingEnvironment *av_ambient_viewing_environment_create_side_data(AVFrame *frame);
#endif /* AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H */

1
libavutil/frame.c
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@@ -831,6 +831,7 @@ const char *av_frame_side_data_name(enum AVFrameSideDataType type)
case AV_FRAME_DATA_DETECTION_BBOXES: return "Bounding boxes for object detection and classification";
case AV_FRAME_DATA_DOVI_RPU_BUFFER: return "Dolby Vision RPU Data";
case AV_FRAME_DATA_DOVI_METADATA: return "Dolby Vision Metadata";
case AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT: return "Ambient viewing environment";
}
return NULL;
}

5
libavutil/frame.h
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@@ -209,6 +209,11 @@ enum AVFrameSideDataType {
* volume transform - CUVA 005.1-2021.
*/
AV_FRAME_DATA_DYNAMIC_HDR_VIVID,
/**
* Ambient viewing environment metadata, as defined by H.274.
*/
AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT,
};
enum AVActiveFormatDescription {

2
libavutil/version.h
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@@ -79,7 +79,7 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 57
#define LIBAVUTIL_VERSION_MINOR 43
#define LIBAVUTIL_VERSION_MINOR 44
#define LIBAVUTIL_VERSION_MICRO 100
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \