/src/ffmpeg/libavutil/side_data.c

Source
/*
 * 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 "avassert.h"
#include "buffer.h"
#include "common.h"
#include "dict.h"
#include "frame.h"
#include "mem.h"
#include "side_data.h"

static const AVSideDataDescriptor sd_props[] = {
    [AV_FRAME_DATA_PANSCAN]                     = { "AVPanScan",                                    AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
    [AV_FRAME_DATA_A53_CC]                      = { "ATSC A53 Part 4 Closed Captions" },
    [AV_FRAME_DATA_MATRIXENCODING]              = { "AVMatrixEncoding",                             AV_SIDE_DATA_PROP_CHANNEL_DEPENDENT },
    [AV_FRAME_DATA_DOWNMIX_INFO]                = { "Metadata relevant to a downmix procedure",     AV_SIDE_DATA_PROP_CHANNEL_DEPENDENT },
    [AV_FRAME_DATA_AFD]                         = { "Active format description" },
    [AV_FRAME_DATA_MOTION_VECTORS]              = { "Motion vectors",                               AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
    [AV_FRAME_DATA_SKIP_SAMPLES]                = { "Skip samples" },
    [AV_FRAME_DATA_GOP_TIMECODE]                = { "GOP timecode" },
    [AV_FRAME_DATA_S12M_TIMECODE]               = { "SMPTE 12-1 timecode" },
    [AV_FRAME_DATA_DYNAMIC_HDR_PLUS]            = { "HDR Dynamic Metadata SMPTE2094-40 (HDR10+)",   AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
    [AV_FRAME_DATA_DYNAMIC_HDR_VIVID]           = { "HDR Dynamic Metadata CUVA 005.1 2021 (Vivid)", AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
    [AV_FRAME_DATA_DYNAMIC_HDR_SMPTE_2094_APP5] = { "HDR Dynamic Metadata SMPTE2094-50",            AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
    [AV_FRAME_DATA_REGIONS_OF_INTEREST]         = { "Regions Of Interest",                          AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
    [AV_FRAME_DATA_VIDEO_ENC_PARAMS]            = { "Video encoding parameters" },
    [AV_FRAME_DATA_FILM_GRAIN_PARAMS]           = { "Film grain parameters" },
    [AV_FRAME_DATA_DETECTION_BBOXES]            = { "Bounding boxes for object detection and classification", AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
    [AV_FRAME_DATA_DOVI_RPU_BUFFER]             = { "Dolby Vision RPU Data",                        AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
    [AV_FRAME_DATA_DOVI_METADATA]               = { "Dolby Vision Metadata",                        AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
    [AV_FRAME_DATA_LCEVC]                       = { "LCEVC NAL data",                               AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
    [AV_FRAME_DATA_VIEW_ID]                     = { "View ID" },
    [AV_FRAME_DATA_STEREO3D]                    = { "Stereo 3D",                                    AV_SIDE_DATA_PROP_GLOBAL },
    [AV_FRAME_DATA_REPLAYGAIN]                  = { "AVReplayGain",                                 AV_SIDE_DATA_PROP_GLOBAL },
    [AV_FRAME_DATA_DISPLAYMATRIX]               = { "3x3 displaymatrix",                            AV_SIDE_DATA_PROP_GLOBAL },
    [AV_FRAME_DATA_AUDIO_SERVICE_TYPE]          = { "Audio service type",                           AV_SIDE_DATA_PROP_GLOBAL },
    [AV_FRAME_DATA_MASTERING_DISPLAY_METADATA]  = { "Mastering display metadata",                   AV_SIDE_DATA_PROP_GLOBAL | AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
    [AV_FRAME_DATA_CONTENT_LIGHT_LEVEL]         = { "Content light level metadata",                 AV_SIDE_DATA_PROP_GLOBAL | AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
    [AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT] = { "Ambient viewing environment",                  AV_SIDE_DATA_PROP_GLOBAL },
    [AV_FRAME_DATA_SPHERICAL]                   = { "Spherical Mapping",                            AV_SIDE_DATA_PROP_GLOBAL | AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
    [AV_FRAME_DATA_ICC_PROFILE]                 = { "ICC profile",                                  AV_SIDE_DATA_PROP_GLOBAL | AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
    [AV_FRAME_DATA_EXIF]                        = { "EXIF metadata",                                AV_SIDE_DATA_PROP_GLOBAL },
    [AV_FRAME_DATA_SEI_UNREGISTERED]            = { "H.26[45] User Data Unregistered SEI message",  AV_SIDE_DATA_PROP_MULTI },
    [AV_FRAME_DATA_VIDEO_HINT]                  = { "Encoding video hint",                          AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
    [AV_FRAME_DATA_3D_REFERENCE_DISPLAYS]       = { "3D Reference Displays Information",            AV_SIDE_DATA_PROP_GLOBAL },
    [AV_FRAME_DATA_IAMF_MIX_GAIN_PARAM]         = { "IAMF Mix Gain Parameter Data" },
    [AV_FRAME_DATA_IAMF_DEMIXING_INFO_PARAM]    = { "IAMF Demixing Info Parameter Data",            AV_SIDE_DATA_PROP_CHANNEL_DEPENDENT },
    [AV_FRAME_DATA_IAMF_RECON_GAIN_INFO_PARAM]  = { "IAMF Recon Gain Info Parameter Data" },
};

const AVSideDataDescriptor *av_frame_side_data_desc(enum AVFrameSideDataType type)
{
    unsigned t = type;
    if (t < FF_ARRAY_ELEMS(sd_props) && sd_props[t].name)
        return &sd_props[t];
    return NULL;
}

const char *av_frame_side_data_name(enum AVFrameSideDataType type)
{
    const AVSideDataDescriptor *desc = av_frame_side_data_desc(type);
    return desc ? desc->name : NULL;
}

static void free_side_data_entry(AVFrameSideData **ptr_sd)
{
    AVFrameSideData *sd = *ptr_sd;

    av_buffer_unref(&sd->buf);
    av_dict_free(&sd->metadata);
    av_freep(ptr_sd);
}

static void remove_side_data_by_entry(AVFrameSideData ***sd, int *nb_sd,
                                      const AVFrameSideData *target)
{
    for (int i = *nb_sd - 1; i >= 0; i--) {
        AVFrameSideData *entry = ((*sd)[i]);
        if (entry != target)
            continue;

        free_side_data_entry(&entry);

        ((*sd)[i]) = ((*sd)[*nb_sd - 1]);
        (*nb_sd)--;

        return;
    }
}

void av_frame_side_data_remove(AVFrameSideData ***sd, int *nb_sd,
                               enum AVFrameSideDataType type)
{
    for (int i = *nb_sd - 1; i >= 0; i--) {
        AVFrameSideData *entry = ((*sd)[i]);
        if (entry->type != type)
            continue;

        free_side_data_entry(&entry);

        ((*sd)[i]) = ((*sd)[*nb_sd - 1]);
        (*nb_sd)--;
    }
}

void av_frame_side_data_remove_by_props(AVFrameSideData ***sd, int *nb_sd,
                                        int props)
{
    for (int i = *nb_sd - 1; i >= 0; i--) {
        AVFrameSideData *entry = ((*sd)[i]);
        const AVSideDataDescriptor *desc = av_frame_side_data_desc(entry->type);
        if (!desc || !(desc->props & props))
            continue;

        free_side_data_entry(&entry);

        ((*sd)[i]) = ((*sd)[*nb_sd - 1]);
        (*nb_sd)--;
    }
}

void av_frame_side_data_free(AVFrameSideData ***sd, int *nb_sd)
{
    for (int i = 0; i < *nb_sd; i++)
        free_side_data_entry(&((*sd)[i]));
    *nb_sd = 0;

    av_freep(sd);
}

static AVFrameSideData *add_side_data_from_buf_ext(AVFrameSideData ***sd,
                                                   int *nb_sd,
                                                   enum AVFrameSideDataType type,
                                                   AVBufferRef *buf, uint8_t *data,
                                                   size_t size)
{
    AVFrameSideData *ret, **tmp;

    // *nb_sd + 1 needs to fit into an int and a size_t.
    if ((unsigned)*nb_sd >= FFMIN(INT_MAX, SIZE_MAX))
        return NULL;

    tmp = av_realloc_array(*sd, *nb_sd + 1, sizeof(**sd));
    if (!tmp)
        return NULL;
    *sd = tmp;

    ret = av_mallocz(sizeof(*ret));
    if (!ret)
        return NULL;

    ret->buf = buf;
    ret->data = data;
    ret->size = size;
    ret->type = type;

    (*sd)[(*nb_sd)++] = ret;

    return ret;
}

AVFrameSideData *ff_frame_side_data_add_from_buf(AVFrameSideData ***sd,
                                                 int *nb_sd,
                                                 enum AVFrameSideDataType type,
                                                 AVBufferRef *buf)
{
    if (!buf)
        return NULL;

    return add_side_data_from_buf_ext(sd, nb_sd, type, buf, buf->data, buf->size);
}

static AVFrameSideData *replace_side_data_from_buf(AVFrameSideData *dst,
                                                   AVBufferRef *buf, int flags)
{
    if (!(flags & AV_FRAME_SIDE_DATA_FLAG_REPLACE))
        return NULL;

    av_dict_free(&dst->metadata);
    av_buffer_unref(&dst->buf);
    dst->buf  = buf;
    dst->data = buf->data;
    dst->size = buf->size;
    return dst;
}

AVFrameSideData *av_frame_side_data_new(AVFrameSideData ***sd, int *nb_sd,
                                        enum AVFrameSideDataType type,
                                        size_t size, unsigned int flags)
{
    const AVSideDataDescriptor *desc = av_frame_side_data_desc(type);
    AVBufferRef     *buf = av_buffer_alloc(size);
    AVFrameSideData *ret = NULL;

    if (flags & AV_FRAME_SIDE_DATA_FLAG_UNIQUE)
        av_frame_side_data_remove(sd, nb_sd, type);
    if ((!desc || !(desc->props & AV_SIDE_DATA_PROP_MULTI)) &&
        (ret = (AVFrameSideData *)av_frame_side_data_get(*sd, *nb_sd, type))) {
        ret = replace_side_data_from_buf(ret, buf, flags);
        if (!ret)
            av_buffer_unref(&buf);
        return ret;
    }

    ret = ff_frame_side_data_add_from_buf(sd, nb_sd, type, buf);
    if (!ret)
        av_buffer_unref(&buf);

    return ret;
}

AVFrameSideData *av_frame_side_data_add(AVFrameSideData ***sd, int *nb_sd,
                                        enum AVFrameSideDataType type,
                                        AVBufferRef **pbuf, unsigned int flags)
{
    const AVSideDataDescriptor *desc = av_frame_side_data_desc(type);
    AVFrameSideData *sd_dst  = NULL;
    AVBufferRef *buf = *pbuf;

    if ((flags & AV_FRAME_SIDE_DATA_FLAG_NEW_REF) && !(buf = av_buffer_ref(*pbuf)))
        return NULL;
    if (flags & AV_FRAME_SIDE_DATA_FLAG_UNIQUE)
        av_frame_side_data_remove(sd, nb_sd, type);
    if ((!desc || !(desc->props & AV_SIDE_DATA_PROP_MULTI)) &&
        (sd_dst = (AVFrameSideData *)av_frame_side_data_get(*sd, *nb_sd, type))) {
        sd_dst = replace_side_data_from_buf(sd_dst, buf, flags);
    } else
        sd_dst = ff_frame_side_data_add_from_buf(sd, nb_sd, type, buf);

    if (sd_dst && !(flags & AV_FRAME_SIDE_DATA_FLAG_NEW_REF))
        *pbuf = NULL;
    else if (!sd_dst && (flags & AV_FRAME_SIDE_DATA_FLAG_NEW_REF))
        av_buffer_unref(&buf);
    return sd_dst;
}

int av_frame_side_data_clone(AVFrameSideData ***sd, int *nb_sd,
                             const AVFrameSideData *src, unsigned int flags)
{
    const AVSideDataDescriptor *desc;
    AVBufferRef     *buf    = NULL;
    AVFrameSideData *sd_dst = NULL;
    int              ret    = AVERROR_BUG;

    if (!sd || !src || !nb_sd || (*nb_sd && !*sd))
        return AVERROR(EINVAL);

    desc = av_frame_side_data_desc(src->type);
    if (flags & AV_FRAME_SIDE_DATA_FLAG_UNIQUE)
        av_frame_side_data_remove(sd, nb_sd, src->type);
    if ((!desc || !(desc->props & AV_SIDE_DATA_PROP_MULTI)) &&
        (sd_dst = (AVFrameSideData *)av_frame_side_data_get(*sd, *nb_sd, src->type))) {
        AVDictionary *dict = NULL;

        if (!(flags & AV_FRAME_SIDE_DATA_FLAG_REPLACE))
            return AVERROR(EEXIST);

        ret = av_dict_copy(&dict, src->metadata, 0);
        if (ret < 0)
            return ret;

        ret = av_buffer_replace(&sd_dst->buf, src->buf);
        if (ret < 0) {
            av_dict_free(&dict);
            return ret;
        }

        av_dict_free(&sd_dst->metadata);
        sd_dst->metadata = dict;
        sd_dst->data     = src->data;
        sd_dst->size     = src->size;
        return 0;
    }

    buf = av_buffer_ref(src->buf);
    if (!buf)
        return AVERROR(ENOMEM);

    sd_dst = add_side_data_from_buf_ext(sd, nb_sd, src->type, buf,
                                        src->data, src->size);
    if (!sd_dst) {
        av_buffer_unref(&buf);
        return AVERROR(ENOMEM);
    }

    ret = av_dict_copy(&sd_dst->metadata, src->metadata, 0);
    if (ret < 0) {
        remove_side_data_by_entry(sd, nb_sd, sd_dst);
        return ret;
    }

    return 0;
}

const AVFrameSideData *av_frame_side_data_get_c(const AVFrameSideData * const *sd,
                                                const int nb_sd,
                                                enum AVFrameSideDataType type)
{
    for (int i = 0; i < nb_sd; i++) {
        if (sd[i]->type == type)
            return sd[i];
    }
    return NULL;
}

Coverage Report

Created: 2026-05-31 06:50

Line	Count	Source
1		/*
2		* This file is part of FFmpeg.
3		*
4		* FFmpeg is free software; you can redistribute it and/or
5		* modify it under the terms of the GNU Lesser General Public
6		* License as published by the Free Software Foundation; either
7		* version 2.1 of the License, or (at your option) any later version.
8		*
9		* FFmpeg is distributed in the hope that it will be useful,
10		* but WITHOUT ANY WARRANTY; without even the implied warranty of
11		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12		* Lesser General Public License for more details.
13		*
14		* You should have received a copy of the GNU Lesser General Public
15		* License along with FFmpeg; if not, write to the Free Software
16		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17		*/
18
19		#include "avassert.h"
20		#include "buffer.h"
21		#include "common.h"
22		#include "dict.h"
23		#include "frame.h"
24		#include "mem.h"
25		#include "side_data.h"
26
27		static const AVSideDataDescriptor sd_props[] = {
28		[AV_FRAME_DATA_PANSCAN] = { "AVPanScan", AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
29		[AV_FRAME_DATA_A53_CC] = { "ATSC A53 Part 4 Closed Captions" },
30		[AV_FRAME_DATA_MATRIXENCODING] = { "AVMatrixEncoding", AV_SIDE_DATA_PROP_CHANNEL_DEPENDENT },
31		[AV_FRAME_DATA_DOWNMIX_INFO] = { "Metadata relevant to a downmix procedure", AV_SIDE_DATA_PROP_CHANNEL_DEPENDENT },
32		[AV_FRAME_DATA_AFD] = { "Active format description" },
33		[AV_FRAME_DATA_MOTION_VECTORS] = { "Motion vectors", AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
34		[AV_FRAME_DATA_SKIP_SAMPLES] = { "Skip samples" },
35		[AV_FRAME_DATA_GOP_TIMECODE] = { "GOP timecode" },
36		[AV_FRAME_DATA_S12M_TIMECODE] = { "SMPTE 12-1 timecode" },
37		[AV_FRAME_DATA_DYNAMIC_HDR_PLUS] = { "HDR Dynamic Metadata SMPTE2094-40 (HDR10+)", AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
38		[AV_FRAME_DATA_DYNAMIC_HDR_VIVID] = { "HDR Dynamic Metadata CUVA 005.1 2021 (Vivid)", AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
39		[AV_FRAME_DATA_DYNAMIC_HDR_SMPTE_2094_APP5] = { "HDR Dynamic Metadata SMPTE2094-50", AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
40		[AV_FRAME_DATA_REGIONS_OF_INTEREST] = { "Regions Of Interest", AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
41		[AV_FRAME_DATA_VIDEO_ENC_PARAMS] = { "Video encoding parameters" },
42		[AV_FRAME_DATA_FILM_GRAIN_PARAMS] = { "Film grain parameters" },
43		[AV_FRAME_DATA_DETECTION_BBOXES] = { "Bounding boxes for object detection and classification", AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
44		[AV_FRAME_DATA_DOVI_RPU_BUFFER] = { "Dolby Vision RPU Data", AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
45		[AV_FRAME_DATA_DOVI_METADATA] = { "Dolby Vision Metadata", AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
46		[AV_FRAME_DATA_LCEVC] = { "LCEVC NAL data", AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
47		[AV_FRAME_DATA_VIEW_ID] = { "View ID" },
48		[AV_FRAME_DATA_STEREO3D] = { "Stereo 3D", AV_SIDE_DATA_PROP_GLOBAL },
49		[AV_FRAME_DATA_REPLAYGAIN] = { "AVReplayGain", AV_SIDE_DATA_PROP_GLOBAL },
50		[AV_FRAME_DATA_DISPLAYMATRIX] = { "3x3 displaymatrix", AV_SIDE_DATA_PROP_GLOBAL },
51		[AV_FRAME_DATA_AUDIO_SERVICE_TYPE] = { "Audio service type", AV_SIDE_DATA_PROP_GLOBAL },
52		[AV_FRAME_DATA_MASTERING_DISPLAY_METADATA] = { "Mastering display metadata", AV_SIDE_DATA_PROP_GLOBAL \| AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
53		[AV_FRAME_DATA_CONTENT_LIGHT_LEVEL] = { "Content light level metadata", AV_SIDE_DATA_PROP_GLOBAL \| AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
54		[AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT] = { "Ambient viewing environment", AV_SIDE_DATA_PROP_GLOBAL },
55		[AV_FRAME_DATA_SPHERICAL] = { "Spherical Mapping", AV_SIDE_DATA_PROP_GLOBAL \| AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
56		[AV_FRAME_DATA_ICC_PROFILE] = { "ICC profile", AV_SIDE_DATA_PROP_GLOBAL \| AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
57		[AV_FRAME_DATA_EXIF] = { "EXIF metadata", AV_SIDE_DATA_PROP_GLOBAL },
58		[AV_FRAME_DATA_SEI_UNREGISTERED] = { "H.26[45] User Data Unregistered SEI message", AV_SIDE_DATA_PROP_MULTI },
59		[AV_FRAME_DATA_VIDEO_HINT] = { "Encoding video hint", AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
60		[AV_FRAME_DATA_3D_REFERENCE_DISPLAYS] = { "3D Reference Displays Information", AV_SIDE_DATA_PROP_GLOBAL },
61		[AV_FRAME_DATA_IAMF_MIX_GAIN_PARAM] = { "IAMF Mix Gain Parameter Data" },
62		[AV_FRAME_DATA_IAMF_DEMIXING_INFO_PARAM] = { "IAMF Demixing Info Parameter Data", AV_SIDE_DATA_PROP_CHANNEL_DEPENDENT },
63		[AV_FRAME_DATA_IAMF_RECON_GAIN_INFO_PARAM] = { "IAMF Recon Gain Info Parameter Data" },
64		};
65
66		const AVSideDataDescriptor *av_frame_side_data_desc(enum AVFrameSideDataType type)
67	0	{
68	0	unsigned t = type;
69	0	if (t < FF_ARRAY_ELEMS(sd_props) && sd_props[t].name)
70	0	return &sd_props[t];
71	0	return NULL;
72	0	}
73
74		const char *av_frame_side_data_name(enum AVFrameSideDataType type)
75	0	{
76	0	const AVSideDataDescriptor *desc = av_frame_side_data_desc(type);
77	0	return desc ? desc->name : NULL;
78	0	}
79
80		static void free_side_data_entry(AVFrameSideData **ptr_sd)
81	0	{
82	0	AVFrameSideData sd = ptr_sd;
83
84	0	av_buffer_unref(&sd->buf);
85	0	av_dict_free(&sd->metadata);
86	0	av_freep(ptr_sd);
87	0	}
88
89		static void remove_side_data_by_entry(AVFrameSideData **sd, int nb_sd,
90		const AVFrameSideData *target)
91	0	{
92	0	for (int i = *nb_sd - 1; i >= 0; i--) {
93	0	AVFrameSideData entry = ((sd)[i]);
94	0	if (entry != target)
95	0	continue;
96
97	0	free_side_data_entry(&entry);
98
99	0	((sd)[i]) = ((sd)[*nb_sd - 1]);
100	0	(*nb_sd)--;
101
102	0	return;
103	0	}
104	0	}
105
106		void av_frame_side_data_remove(AVFrameSideData **sd, int nb_sd,
107		enum AVFrameSideDataType type)
108	0	{
109	0	for (int i = *nb_sd - 1; i >= 0; i--) {
110	0	AVFrameSideData entry = ((sd)[i]);
111	0	if (entry->type != type)
112	0	continue;
113
114	0	free_side_data_entry(&entry);
115
116	0	((sd)[i]) = ((sd)[*nb_sd - 1]);
117	0	(*nb_sd)--;
118	0	}
119	0	}
120
121		void av_frame_side_data_remove_by_props(AVFrameSideData **sd, int nb_sd,
122		int props)
123	0	{
124	0	for (int i = *nb_sd - 1; i >= 0; i--) {
125	0	AVFrameSideData entry = ((sd)[i]);
126	0	const AVSideDataDescriptor *desc = av_frame_side_data_desc(entry->type);
127	0	if (!desc \|\| !(desc->props & props))
128	0	continue;
129
130	0	free_side_data_entry(&entry);
131
132	0	((sd)[i]) = ((sd)[*nb_sd - 1]);
133	0	(*nb_sd)--;
134	0	}
135	0	}
136
137		void av_frame_side_data_free(AVFrameSideData **sd, int nb_sd)
138	0	{
139	0	for (int i = 0; i < *nb_sd; i++)
140	0	free_side_data_entry(&((*sd)[i]));
141	0	*nb_sd = 0;
142
143	0	av_freep(sd);
144	0	}
145
146		static AVFrameSideData add_side_data_from_buf_ext(AVFrameSideData **sd,
147		int *nb_sd,
148		enum AVFrameSideDataType type,
149		AVBufferRef buf, uint8_t data,
150		size_t size)
151	0	{
152	0	AVFrameSideData ret, *tmp;
153
154		// *nb_sd + 1 needs to fit into an int and a size_t.
155	0	if ((unsigned)*nb_sd >= FFMIN(INT_MAX, SIZE_MAX))
156	0	return NULL;
157
158	0	tmp = av_realloc_array(sd, nb_sd + 1, sizeof(**sd));
159	0	if (!tmp)
160	0	return NULL;
161	0	*sd = tmp;
162
163	0	ret = av_mallocz(sizeof(*ret));
164	0	if (!ret)
165	0	return NULL;
166
167	0	ret->buf = buf;
168	0	ret->data = data;
169	0	ret->size = size;
170	0	ret->type = type;
171
172	0	(sd)[(nb_sd)++] = ret;
173
174	0	return ret;
175	0	}
176
177		AVFrameSideData ff_frame_side_data_add_from_buf(AVFrameSideData **sd,
178		int *nb_sd,
179		enum AVFrameSideDataType type,
180		AVBufferRef *buf)
181	0	{
182	0	if (!buf)
183	0	return NULL;
184
185	0	return add_side_data_from_buf_ext(sd, nb_sd, type, buf, buf->data, buf->size);
186	0	}
187
188		static AVFrameSideData replace_side_data_from_buf(AVFrameSideData dst,
189		AVBufferRef *buf, int flags)
190	0	{
191	0	if (!(flags & AV_FRAME_SIDE_DATA_FLAG_REPLACE))
192	0	return NULL;
193
194	0	av_dict_free(&dst->metadata);
195	0	av_buffer_unref(&dst->buf);
196	0	dst->buf = buf;
197	0	dst->data = buf->data;
198	0	dst->size = buf->size;
199	0	return dst;
200	0	}
201
202		AVFrameSideData av_frame_side_data_new(AVFrameSideData *sd, int nb_sd,
203		enum AVFrameSideDataType type,
204		size_t size, unsigned int flags)
205	0	{
206	0	const AVSideDataDescriptor *desc = av_frame_side_data_desc(type);
207	0	AVBufferRef *buf = av_buffer_alloc(size);
208	0	AVFrameSideData *ret = NULL;
209
210	0	if (flags & AV_FRAME_SIDE_DATA_FLAG_UNIQUE)
211	0	av_frame_side_data_remove(sd, nb_sd, type);
212	0	if ((!desc \|\| !(desc->props & AV_SIDE_DATA_PROP_MULTI)) &&
213	0	(ret = (AVFrameSideData )av_frame_side_data_get(sd, *nb_sd, type))) {
214	0	ret = replace_side_data_from_buf(ret, buf, flags);
215	0	if (!ret)
216	0	av_buffer_unref(&buf);
217	0	return ret;
218	0	}
219
220	0	ret = ff_frame_side_data_add_from_buf(sd, nb_sd, type, buf);
221	0	if (!ret)
222	0	av_buffer_unref(&buf);
223
224	0	return ret;
225	0	}
226
227		AVFrameSideData av_frame_side_data_add(AVFrameSideData *sd, int nb_sd,
228		enum AVFrameSideDataType type,
229		AVBufferRef **pbuf, unsigned int flags)
230	0	{
231	0	const AVSideDataDescriptor *desc = av_frame_side_data_desc(type);
232	0	AVFrameSideData *sd_dst = NULL;
233	0	AVBufferRef buf = pbuf;
234
235	0	if ((flags & AV_FRAME_SIDE_DATA_FLAG_NEW_REF) && !(buf = av_buffer_ref(*pbuf)))
236	0	return NULL;
237	0	if (flags & AV_FRAME_SIDE_DATA_FLAG_UNIQUE)
238	0	av_frame_side_data_remove(sd, nb_sd, type);
239	0	if ((!desc \|\| !(desc->props & AV_SIDE_DATA_PROP_MULTI)) &&
240	0	(sd_dst = (AVFrameSideData )av_frame_side_data_get(sd, *nb_sd, type))) {
241	0	sd_dst = replace_side_data_from_buf(sd_dst, buf, flags);
242	0	} else
243	0	sd_dst = ff_frame_side_data_add_from_buf(sd, nb_sd, type, buf);
244
245	0	if (sd_dst && !(flags & AV_FRAME_SIDE_DATA_FLAG_NEW_REF))
246	0	*pbuf = NULL;
247	0	else if (!sd_dst && (flags & AV_FRAME_SIDE_DATA_FLAG_NEW_REF))
248	0	av_buffer_unref(&buf);
249	0	return sd_dst;
250	0	}
251
252		int av_frame_side_data_clone(AVFrameSideData **sd, int nb_sd,
253		const AVFrameSideData *src, unsigned int flags)
254	0	{
255	0	const AVSideDataDescriptor *desc;
256	0	AVBufferRef *buf = NULL;
257	0	AVFrameSideData *sd_dst = NULL;
258	0	int ret = AVERROR_BUG;
259
260	0	if (!sd \|\| !src \|\| !nb_sd \|\| (nb_sd && !sd))
261	0	return AVERROR(EINVAL);
262
263	0	desc = av_frame_side_data_desc(src->type);
264	0	if (flags & AV_FRAME_SIDE_DATA_FLAG_UNIQUE)
265	0	av_frame_side_data_remove(sd, nb_sd, src->type);
266	0	if ((!desc \|\| !(desc->props & AV_SIDE_DATA_PROP_MULTI)) &&
267	0	(sd_dst = (AVFrameSideData )av_frame_side_data_get(sd, *nb_sd, src->type))) {
268	0	AVDictionary *dict = NULL;
269
270	0	if (!(flags & AV_FRAME_SIDE_DATA_FLAG_REPLACE))
271	0	return AVERROR(EEXIST);
272
273	0	ret = av_dict_copy(&dict, src->metadata, 0);
274	0	if (ret < 0)
275	0	return ret;
276
277	0	ret = av_buffer_replace(&sd_dst->buf, src->buf);
278	0	if (ret < 0) {
279	0	av_dict_free(&dict);
280	0	return ret;
281	0	}
282
283	0	av_dict_free(&sd_dst->metadata);
284	0	sd_dst->metadata = dict;
285	0	sd_dst->data = src->data;
286	0	sd_dst->size = src->size;
287	0	return 0;
288	0	}
289
290	0	buf = av_buffer_ref(src->buf);
291	0	if (!buf)
292	0	return AVERROR(ENOMEM);
293
294	0	sd_dst = add_side_data_from_buf_ext(sd, nb_sd, src->type, buf,
295	0	src->data, src->size);
296	0	if (!sd_dst) {
297	0	av_buffer_unref(&buf);
298	0	return AVERROR(ENOMEM);
299	0	}
300
301	0	ret = av_dict_copy(&sd_dst->metadata, src->metadata, 0);
302	0	if (ret < 0) {
303	0	remove_side_data_by_entry(sd, nb_sd, sd_dst);
304	0	return ret;
305	0	}
306
307	0	return 0;
308	0	}
309
310		const AVFrameSideData av_frame_side_data_get_c(const AVFrameSideData const *sd,
311		const int nb_sd,
312		enum AVFrameSideDataType type)
313	0	{
314	0	for (int i = 0; i < nb_sd; i++) {
315	0	if (sd[i]->type == type)
316	0	return sd[i];
317	0	}
318	0	return NULL;
319	0	}