cbs: Ensure that reference fields always follow the associated pointer

Having these together allows us to find both pointers given the address
of only one of them.

libavcodec/cbs_av1.h

@@ -284,8 +284,8 @@ typedef struct AV1RawFrameHeader {
 
 typedef struct AV1RawTileData {
     uint8_t     *data;
-    size_t       data_size;
     AVBufferRef *data_ref;
+    size_t       data_size;
 } AV1RawTileData;
 
 typedef struct AV1RawTileGroup {
@@ -346,8 +346,8 @@ typedef struct AV1RawMetadataITUTT35 {
     uint8_t itu_t_t35_country_code_extension_byte;
 
     uint8_t     *payload;
-    size_t       payload_size;
     AVBufferRef *payload_ref;
+    size_t       payload_size;
 } AV1RawMetadataITUTT35;
 
 typedef struct AV1RawMetadataTimecode {
@@ -379,8 +379,8 @@ typedef struct AV1RawMetadata {
 
 typedef struct AV1RawPadding {
     uint8_t     *payload;
-    size_t       payload_size;
     AVBufferRef *payload_ref;
+    size_t       payload_size;
 } AV1RawPadding;
 
 

libavcodec/cbs_h264.h

@@ -277,16 +277,16 @@ typedef struct H264RawSEIPanScanRect {
 typedef struct H264RawSEIUserDataRegistered {
     uint8_t itu_t_t35_country_code;
     uint8_t itu_t_t35_country_code_extension_byte;
-    uint8_t *data;
-    size_t data_length;
+    uint8_t     *data;
     AVBufferRef *data_ref;
+    size_t       data_length;
 } H264RawSEIUserDataRegistered;
 
 typedef struct H264RawSEIUserDataUnregistered {
     uint8_t uuid_iso_iec_11578[16];
-    uint8_t *data;
-    size_t data_length;
+    uint8_t     *data;
     AVBufferRef *data_ref;
+    size_t       data_length;
 } H264RawSEIUserDataUnregistered;
 
 typedef struct H264RawSEIRecoveryPoint {
@@ -334,9 +334,9 @@ typedef struct H264RawSEIPayload {
         H264RawSEIAlternativeTransferCharacteristics
             alternative_transfer_characteristics;
         struct {
-            uint8_t *data;
-            size_t data_length;
+            uint8_t     *data;
             AVBufferRef *data_ref;
+            size_t       data_length;
         } other;
     } payload;
 } H264RawSEIPayload;
@@ -429,10 +429,10 @@ typedef struct H264RawSliceHeader {
 typedef struct H264RawSlice {
     H264RawSliceHeader header;
 
-    uint8_t *data;
-    size_t   data_size;
-    int      data_bit_start;
+    uint8_t     *data;
     AVBufferRef *data_ref;
+    size_t       data_size;
+    int          data_bit_start;
 } H264RawSlice;
 
 typedef struct H264RawFiller {

libavcodec/cbs_h265.h

@@ -183,9 +183,9 @@ typedef struct H265RawVUI {
 } H265RawVUI;
 
 typedef struct H265RawExtensionData {
-    uint8_t *data;
-    size_t bit_length;
+    uint8_t     *data;
     AVBufferRef *data_ref;
+    size_t       bit_length;
 } H265RawExtensionData;
 
 typedef struct H265RawVPS {
@@ -541,10 +541,10 @@ typedef struct  H265RawSliceHeader {
 typedef struct H265RawSlice {
     H265RawSliceHeader header;
 
-    uint8_t *data;
-    size_t   data_size;
-    int      data_bit_start;
+    uint8_t     *data;
     AVBufferRef *data_ref;
+    size_t       data_size;
+    int          data_bit_start;
 } H265RawSlice;
 
 
@@ -600,15 +600,15 @@ typedef struct H265RawSEIUserDataRegistered {
     uint8_t itu_t_t35_country_code;
     uint8_t itu_t_t35_country_code_extension_byte;
     uint8_t     *data;
-    size_t       data_length;
     AVBufferRef *data_ref;
+    size_t       data_length;
 } H265RawSEIUserDataRegistered;
 
 typedef struct H265RawSEIUserDataUnregistered {
     uint8_t uuid_iso_iec_11578[16];
     uint8_t     *data;
-    size_t       data_length;
     AVBufferRef *data_ref;
+    size_t       data_length;
 } H265RawSEIUserDataUnregistered;
 
 typedef struct H265RawSEIRecoveryPoint {
@@ -710,9 +710,9 @@ typedef struct H265RawSEIPayload {
             alternative_transfer_characteristics;
         H265RawSEIAlphaChannelInfo alpha_channel_info;
         struct {
-            uint8_t *data;
-            size_t data_length;
+            uint8_t     *data;
             AVBufferRef *data_ref;
+            size_t       data_length;
         } other;
     } payload;
     H265RawExtensionData extension_data;

libavcodec/cbs_jpeg.h

@@ -80,8 +80,8 @@ typedef struct JPEGRawScanHeader {
 typedef struct JPEGRawScan {
     JPEGRawScanHeader header;
     uint8_t          *data;
-    size_t            data_size;
     AVBufferRef      *data_ref;
+    size_t            data_size;
 } JPEGRawScan;
 
 typedef struct JPEGRawQuantisationTable {

libavcodec/cbs_mpeg2.h

@@ -76,9 +76,9 @@ typedef struct MPEG2RawSequenceHeader {
 typedef struct MPEG2RawUserData {
     uint8_t user_data_start_code;
 
-    uint8_t *user_data;
-    size_t user_data_length;
+    uint8_t     *user_data;
     AVBufferRef *user_data_ref;
+    size_t       user_data_length;
 } MPEG2RawUserData;
 
 typedef struct MPEG2RawSequenceExtension {
@@ -206,10 +206,10 @@ typedef struct MPEG2RawSliceHeader {
 typedef struct MPEG2RawSlice {
     MPEG2RawSliceHeader header;
 
-    uint8_t *data;
-    size_t   data_size;
-    int      data_bit_start;
+    uint8_t     *data;
     AVBufferRef *data_ref;
+    size_t       data_size;
+    int          data_bit_start;
 } MPEG2RawSlice;
 
 typedef struct MPEG2RawSequenceEnd {

libavcodec/cbs_vp9.h

@@ -165,8 +165,8 @@ typedef struct VP9RawFrame {
     VP9RawFrameHeader header;
 
     uint8_t     *data;
-    size_t       data_size;
     AVBufferRef *data_ref;
+    size_t       data_size;
 } VP9RawFrame;
 
 typedef struct VP9RawSuperframeIndex {