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Code Issues Releases Activity

avutil/frame: move side data helpers to a new file

Browse Source 
Should reduce clutter in frame.c, plus allow us to make opaque changes to
side data handling.

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer
2025-01-23 11:23:50 -03:00
parent 8631990f22
commit 964d28e83c
4 changed files with 351 additions and 311 deletions
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1
libavutil/Makefile
View File

@@ -172,6 +172,7 @@ OBJS = adler32.o \
rc4.o \
ripemd.o \
samplefmt.o \
side_data.o \
sha.o \
sha512.o \
slicethread.o \

318
libavutil/frame.c
View File

@@ -26,41 +26,9 @@
#include "imgutils.h"
#include "mem.h"
#include "samplefmt.h"
#include "side_data.h"
#include "hwcontext.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_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_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 },
};
static void get_frame_defaults(AVFrame *frame)
{
memset(frame, 0, sizeof(*frame));
@@ -87,67 +55,6 @@ FF_ENABLE_DEPRECATION_WARNINGS
frame->flags = 0;
}
static void free_side_data(AVFrameSideData **ptr_sd)
{
AVFrameSideData *sd = *ptr_sd;
av_buffer_unref(&sd->buf);
av_dict_free(&sd->metadata);
av_freep(ptr_sd);
}
static void wipe_side_data(AVFrameSideData ***sd, int *nb_side_data)
{
for (int i = 0; i < *nb_side_data; i++) {
free_side_data(&((*sd)[i]));
}
*nb_side_data = 0;
av_freep(sd);
}
static void frame_side_data_wipe(AVFrame *frame)
{
wipe_side_data(&frame->side_data, &frame->nb_side_data);
}
void av_frame_side_data_free(AVFrameSideData ***sd, int *nb_sd)
{
wipe_side_data(sd, nb_sd);
}
static void remove_side_data(AVFrameSideData ***sd, int *nb_side_data,
const enum AVFrameSideDataType type)
{
for (int i = *nb_side_data - 1; i >= 0; i--) {
AVFrameSideData *entry = ((*sd)[i]);
if (entry->type != type)
continue;
free_side_data(&entry);
((*sd)[i]) = ((*sd)[*nb_side_data - 1]);
(*nb_side_data)--;
}
}
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);
((*sd)[i]) = ((*sd)[*nb_sd - 1]);
(*nb_sd)--;
return;
}
}
AVFrame *av_frame_alloc(void)
{
AVFrame *frame = av_malloc(sizeof(*frame));
@@ -377,7 +284,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
sd_dst = av_frame_new_side_data(dst, sd_src->type,
sd_src->size);
if (!sd_dst) {
frame_side_data_wipe(dst);
av_frame_side_data_free(&dst->side_data, &dst->nb_side_data);
return AVERROR(ENOMEM);
}
memcpy(sd_dst->data, sd_src->data, sd_src->size);
@@ -386,7 +293,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
sd_dst = av_frame_new_side_data_from_buf(dst, sd_src->type, ref);
if (!sd_dst) {
av_buffer_unref(&ref);
frame_side_data_wipe(dst);
av_frame_side_data_free(&dst->side_data, &dst->nb_side_data);
return AVERROR(ENOMEM);
}
}
@@ -526,7 +433,7 @@ int av_frame_replace(AVFrame *dst, const AVFrame *src)
if (ret < 0)
goto fail;
frame_side_data_wipe(dst);
av_frame_side_data_free(&dst->side_data, &dst->nb_side_data);
av_dict_free(&dst->metadata);
ret = frame_copy_props(dst, src, 0);
if (ret < 0)
@@ -625,7 +532,7 @@ void av_frame_unref(AVFrame *frame)
if (!frame)
return;
frame_side_data_wipe(frame);
av_frame_side_data_free(&frame->side_data, &frame->nb_side_data);
for (int i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
av_buffer_unref(&frame->buf[i]);
@@ -762,54 +669,12 @@ AVBufferRef *av_frame_get_plane_buffer(const AVFrame *frame, int plane)
return NULL;
}
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, sizeof(**sd), *nb_sd + 1);
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;
}
static AVFrameSideData *add_side_data_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);
}
AVFrameSideData *av_frame_new_side_data_from_buf(AVFrame *frame,
enum AVFrameSideDataType type,
AVBufferRef *buf)
{
return
add_side_data_from_buf(
ff_frame_side_data_add_from_buf(
&frame->side_data, &frame->nb_side_data, type, buf);
}
@@ -825,161 +690,6 @@ AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
return ret;
}
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)
remove_side_data(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 = add_side_data_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)
remove_side_data(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 = add_side_data_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)
remove_side_data(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;
}
void av_frame_side_data_remove(AVFrameSideData ***sd, int *nb_sd,
enum AVFrameSideDataType type)
{
remove_side_data(sd, nb_sd, type);
}
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);
((*sd)[i]) = ((*sd)[*nb_sd - 1]);
(*nb_sd)--;
}
}
AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
enum AVFrameSideDataType type)
{
@@ -1048,21 +758,7 @@ int av_frame_copy(AVFrame *dst, const AVFrame *src)
void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type)
{
remove_side_data(&frame->side_data, &frame->nb_side_data, type);
}
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;
av_frame_side_data_remove(&frame->side_data, &frame->nb_side_data, type);
}
static int calc_cropping_offsets(size_t offsets[4], const AVFrame *frame,

313
libavutil/side_data.c Normal file
View File

@@ -0,0 +1,313 @@
/*
* 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_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_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 },
};
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, sizeof(**sd), *nb_sd + 1);
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;
}

30
libavutil/side_data.h Normal file
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@@ -0,0 +1,30 @@
/*
* 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_SIDE_DATA_H
#define AVUTIL_SIDE_DATA_H
#include "buffer.h"
#include "frame.h"
AVFrameSideData *ff_frame_side_data_add_from_buf(AVFrameSideData ***sd,
int *nb_sd,
enum AVFrameSideDataType type,
AVBufferRef *buf);
#endif // AVUTIL_SIDE_DATA_H