avpacket: Provide an alloc and a free function for the struct

Pave the way for having the size of the AVPacket struct not part
of the ABI.

1 files changed, 22 insertions, 0 deletions

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index a370e3ebb8..9e6b0defae 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -3413,6 +3413,28 @@ void avsubtitle_free(AVSubtitle *sub);
  */
 
 /**
+ * Allocate an AVPacket and set its fields to default values.  The resulting
+ * struct must be freed using av_packet_free().
+ *
+ * @return An AVPacket filled with default values or NULL on failure.
+ *
+ * @note this only allocates the AVPacket itself, not the data buffers. Those
+ * must be allocated through other means such as av_new_packet.
+ *
+ * @see av_new_packet
+ */
+AVPacket *av_packet_alloc(void);
+
+/**
+ * Free the packet, if the packet is reference counted, it will be
+ * unreferenced first.
+ *
+ * @param packet packet to be freed. The pointer will be set to NULL.
+ * @note passing NULL is a no-op.
+ */
+void av_packet_free(AVPacket **pkt);
+
+/**
  * Initialize optional fields of a packet with default values.
  *
  * Note, this does not touch the data and size members, which have to be