avformat/utils: Move ff_stream_side_data_copy to avformat.c

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/libavformat/avformat.c b/libavformat/avformat.c
index 2a919ad89f..3eae41d109 100644
--- a/libavformat/avformat.c
+++ b/libavformat/avformat.c
@@ -204,6 +204,36 @@ uint8_t *av_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
     return data;
 }
 
+int ff_stream_side_data_copy(AVStream *dst, const AVStream *src)
+{
+    /* Free existing side data*/
+    for (int i = 0; i < dst->nb_side_data; i++)
+        av_free(dst->side_data[i].data);
+    av_freep(&dst->side_data);
+    dst->nb_side_data = 0;
+
+    /* Copy side data if present */
+    if (src->nb_side_data) {
+        dst->side_data = av_calloc(src->nb_side_data,
+                                   sizeof(*dst->side_data));
+        if (!dst->side_data)
+            return AVERROR(ENOMEM);
+        dst->nb_side_data = src->nb_side_data;
+
+        for (int i = 0; i < src->nb_side_data; i++) {
+            uint8_t *data = av_memdup(src->side_data[i].data,
+                                      src->side_data[i].size);
+            if (!data)
+                return AVERROR(ENOMEM);
+            dst->side_data[i].type = src->side_data[i].type;
+            dst->side_data[i].size = src->side_data[i].size;
+            dst->side_data[i].data = data;
+        }
+    }
+
+    return 0;
+}
+
 AVProgram *av_new_program(AVFormatContext *ac, int id)
 {
     AVProgram *program = NULL;