Will be useful in the following commits to add fields that don't need to be
exposed.

Signed-off-by: James Almer <jamr...@gmail.com>
---
 libavutil/side_data.c | 70 +++++++++++++++++++++++--------------------
 1 file changed, 37 insertions(+), 33 deletions(-)

diff --git a/libavutil/side_data.c b/libavutil/side_data.c
index 17965f2d3c..8c57fd838a 100644
--- a/libavutil/side_data.c
+++ b/libavutil/side_data.c
@@ -24,44 +24,48 @@
 #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 },
+typedef struct FFSideDataDescriptor {
+    AVSideDataDescriptor p;
+} FFSideDataDescriptor;
+
+static const FFSideDataDescriptor sd_props[] = {
+    [AV_FRAME_DATA_PANSCAN]                     = { .p = { "AVPanScan",        
                            AV_SIDE_DATA_PROP_SIZE_DEPENDENT } },
+    [AV_FRAME_DATA_A53_CC]                      = { .p = { "ATSC A53 Part 4 
Closed Captions" } },
+    [AV_FRAME_DATA_MATRIXENCODING]              = { .p = { "AVMatrixEncoding", 
                            AV_SIDE_DATA_PROP_CHANNEL_DEPENDENT } },
+    [AV_FRAME_DATA_DOWNMIX_INFO]                = { .p = { "Metadata relevant 
to a downmix procedure",     AV_SIDE_DATA_PROP_CHANNEL_DEPENDENT } },
+    [AV_FRAME_DATA_AFD]                         = { .p = { "Active format 
description" } },
+    [AV_FRAME_DATA_MOTION_VECTORS]              = { .p = { "Motion vectors",   
                            AV_SIDE_DATA_PROP_SIZE_DEPENDENT } },
+    [AV_FRAME_DATA_SKIP_SAMPLES]                = { .p = { "Skip samples" } },
+    [AV_FRAME_DATA_GOP_TIMECODE]                = { .p = { "GOP timecode" } },
+    [AV_FRAME_DATA_S12M_TIMECODE]               = { .p = { "SMPTE 12-1 
timecode" } },
+    [AV_FRAME_DATA_DYNAMIC_HDR_PLUS]            = { .p = { "HDR Dynamic 
Metadata SMPTE2094-40 (HDR10+)",   AV_SIDE_DATA_PROP_COLOR_DEPENDENT } },
+    [AV_FRAME_DATA_DYNAMIC_HDR_VIVID]           = { .p = { "HDR Dynamic 
Metadata CUVA 005.1 2021 (Vivid)", AV_SIDE_DATA_PROP_COLOR_DEPENDENT } },
+    [AV_FRAME_DATA_REGIONS_OF_INTEREST]         = { .p = { "Regions Of 
Interest",                          AV_SIDE_DATA_PROP_SIZE_DEPENDENT } },
+    [AV_FRAME_DATA_VIDEO_ENC_PARAMS]            = { .p = { "Video encoding 
parameters" } },
+    [AV_FRAME_DATA_FILM_GRAIN_PARAMS]           = { .p = { "Film grain 
parameters" } },
+    [AV_FRAME_DATA_DETECTION_BBOXES]            = { .p = { "Bounding boxes for 
object detection and classification", AV_SIDE_DATA_PROP_SIZE_DEPENDENT } },
+    [AV_FRAME_DATA_DOVI_RPU_BUFFER]             = { .p = { "Dolby Vision RPU 
Data",                        AV_SIDE_DATA_PROP_COLOR_DEPENDENT } },
+    [AV_FRAME_DATA_DOVI_METADATA]               = { .p = { "Dolby Vision 
Metadata",                        AV_SIDE_DATA_PROP_COLOR_DEPENDENT } },
+    [AV_FRAME_DATA_LCEVC]                       = { .p = { "LCEVC NAL data",   
                            AV_SIDE_DATA_PROP_SIZE_DEPENDENT } },
+    [AV_FRAME_DATA_VIEW_ID]                     = { .p = { "View ID" } },
+    [AV_FRAME_DATA_STEREO3D]                    = { .p = { "Stereo 3D",        
                            AV_SIDE_DATA_PROP_GLOBAL } },
+    [AV_FRAME_DATA_REPLAYGAIN]                  = { .p = { "AVReplayGain",     
                            AV_SIDE_DATA_PROP_GLOBAL } },
+    [AV_FRAME_DATA_DISPLAYMATRIX]               = { .p = { "3x3 
displaymatrix",                            AV_SIDE_DATA_PROP_GLOBAL } },
+    [AV_FRAME_DATA_AUDIO_SERVICE_TYPE]          = { .p = { "Audio service 
type",                           AV_SIDE_DATA_PROP_GLOBAL } },
+    [AV_FRAME_DATA_MASTERING_DISPLAY_METADATA]  = { .p = { "Mastering display 
metadata",                   AV_SIDE_DATA_PROP_GLOBAL | 
AV_SIDE_DATA_PROP_COLOR_DEPENDENT } },
+    [AV_FRAME_DATA_CONTENT_LIGHT_LEVEL]         = { .p = { "Content light 
level metadata",                 AV_SIDE_DATA_PROP_GLOBAL | 
AV_SIDE_DATA_PROP_COLOR_DEPENDENT } },
+    [AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT] = { .p = { "Ambient viewing 
environment",                  AV_SIDE_DATA_PROP_GLOBAL } },
+    [AV_FRAME_DATA_SPHERICAL]                   = { .p = { "Spherical 
Mapping",                            AV_SIDE_DATA_PROP_GLOBAL | 
AV_SIDE_DATA_PROP_SIZE_DEPENDENT } },
+    [AV_FRAME_DATA_ICC_PROFILE]                 = { .p = { "ICC profile",      
                            AV_SIDE_DATA_PROP_GLOBAL | 
AV_SIDE_DATA_PROP_COLOR_DEPENDENT } },
+    [AV_FRAME_DATA_SEI_UNREGISTERED]            = { .p = { "H.26[45] User Data 
Unregistered SEI message",  AV_SIDE_DATA_PROP_MULTI } },
+    [AV_FRAME_DATA_VIDEO_HINT]                  = { .p = { "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];
+    if (t < FF_ARRAY_ELEMS(sd_props) && sd_props[t].p.name)
+        return &sd_props[t].p;
     return NULL;
 }
 
-- 
2.48.1

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