[FFmpeg-devel] [PATCH 1/5] avutil/frame: add helper for adding side data w/ AVBufferRef to array

[James Almer <jamrial@gmail.com>]

Signed-off-by: James Almer <jamrial@gmail.com>
---
Now taking ownership of the passed in buffer, as Anton suggested.

 libavutil/frame.c | 22 ++++++++++++++++++++++
 libavutil/frame.h | 23 +++++++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/libavutil/frame.c b/libavutil/frame.c
index d7a32cdc92..0717d89711 100644
--- a/libavutil/frame.c
+++ b/libavutil/frame.c
@@ -782,6 +782,28 @@ AVFrameSideData *av_frame_side_data_new(AVFrameSideData ***sd, int *nb_sd,
     return ret;
 }
 
+AVFrameSideData *av_frame_side_data_add(AVFrameSideData ***sd, int *nb_sd,
+                                        enum AVFrameSideDataType type,
+                                        AVBufferRef **buf,
+                                        unsigned int flags)
+{
+    AVFrameSideData *sd_dst  = NULL;
+
+    if (!sd || !buf || !nb_sd || (*nb_sd && !*sd))
+        return NULL;
+
+    if (flags & AV_FRAME_SIDE_DATA_FLAG_UNIQUE)
+        remove_side_data(sd, nb_sd, type);
+
+    sd_dst = add_side_data_from_buf(sd, nb_sd, type, *buf);
+    if (!sd_dst)
+        return NULL;
+
+    *buf = NULL;
+
+    return sd_dst;
+}
+
 int av_frame_side_data_clone(AVFrameSideData ***sd, int *nb_sd,
                              const AVFrameSideData *src, unsigned int flags)
 {
diff --git a/libavutil/frame.h b/libavutil/frame.h
index 373866c600..e3733ce928 100644
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -1021,6 +1021,29 @@ AVFrameSideData *av_frame_side_data_new(AVFrameSideData ***sd, int *nb_sd,
                                         enum AVFrameSideDataType type,
                                         size_t size, unsigned int flags);
 
+/**
+ * Add a new side data entry to an array from an existing AVBufferRef.
+ *
+ * @param sd    pointer to array of side data to which to add another entry,
+ *              or to NULL in order to start a new array.
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array.
+ * @param type  type of the added side data
+ * @param buf   Pointer to AVBufferRef to add to the array. On success,
+ *              the ownership of the AVBufferRef is transferred to the frame
+ *              and *buf is set to NULL.
+ * @param flags Some combination of AV_FRAME_SIDE_DATA_FLAG_* flags, or 0.
+ *
+ * @return newly added side data on success, NULL on error. In case of
+ *         AV_FRAME_SIDE_DATA_FLAG_UNIQUE being set, entries of matching
+ *         AVFrameSideDataType will be removed before the addition is
+ *         attempted.
+ */
+AVFrameSideData *av_frame_side_data_add(AVFrameSideData ***sd, int *nb_sd,
+                                        enum AVFrameSideDataType type,
+                                        AVBufferRef **buf,
+                                        unsigned int flags);
+
 /**
  * Add a new side data entry to an array based on existing side data, taking
  * a reference towards the contained AVBufferRef.
-- 
2.44.0

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