avio: Add an internal utility function for freeing dynamic buffers

Signed-off-by: Martin Storsjö <martin@martin.st>

1 files changed, 10 insertions, 0 deletions

diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index 5f848b20f9..8dc805a3ae 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -991,6 +991,16 @@ int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
     return size - padding;
 }
 
+void ffio_free_dyn_buf(AVIOContext **s)
+{
+    uint8_t *tmp;
+    if (!*s)
+        return;
+    avio_close_dyn_buf(*s, &tmp);
+    av_free(tmp);
+    *s = NULL;
+}
+
 static int null_buf_write(void *opaque, uint8_t *buf, int buf_size)
 {
     DynBuffer *d = opaque;