It works as a drop in replacement for the deprecated av_dup_packet(),
to ensure a packet is reference counted.
Signed-off-by: James Almer <jamr...@gmail.com>
---
libavcodec/avcodec.h | 18 +++++++++++++++++-
libavcodec/avpacket.c | 18 ++++++++++++++++++
2 files changed, 35 insertions(+), 1 deletion(-)
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 3306910dd2..c046f300ef 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -4365,7 +4365,7 @@ int av_packet_from_data(AVPacket *pkt, uint8_t *data, int
size);
* @warning This is a hack - the packet memory allocation stuff is broken. The
* packet is allocated if it was not really allocated.
*
- * @deprecated Use av_packet_ref
+ * @deprecated Use av_packet_ref or av_packet_make_refcounted
*/
attribute_deprecated
int av_dup_packet(AVPacket *pkt);
@@ -4536,6 +4536,22 @@ void av_packet_move_ref(AVPacket *dst, AVPacket *src);
*/
int av_packet_copy_props(AVPacket *dst, const AVPacket *src);
+/**
+ * Ensure the data described by a given packet is reference counted.
+ *
+ * @note This function does no ensure that the reference will be writable.
+ * Use av_packet_make_writable instead for that purpose.
+ *
+ * @see av_packet_ref
+ * @see av_packet_make_writable
+ *
+ * @param pkt packet whose data should be made reference counted.
+ *
+ * @return 0 on success, a negative AVERROR on error. On failure, the
+ * packet is unchanged.
+ */
+int av_packet_make_refcounted(AVPacket *pkt);
+
/**
* Create a writable reference for the data described by a given packet,
* avoiding data copy if possible.
diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
index 0993481961..99a0c1383b 100644
--- a/libavcodec/avpacket.c
+++ b/libavcodec/avpacket.c
@@ -652,6 +652,24 @@ void av_packet_move_ref(AVPacket *dst, AVPacket *src)
src->size = 0;
}
+int av_packet_make_refcounted(AVPacket *pkt)
+{
+ int ret;
+
+ if (pkt->buf)
+ return 0;
+
+ ret = packet_alloc(&pkt->buf, pkt->size);
+ if (ret < 0)
+ return ret;
+ if (pkt->size)
+ memcpy(pkt->buf->data, pkt->data, pkt->size);
+
+ pkt->data = pkt->buf->data;
+
+ return 0;
+}
+
int av_packet_make_writable(AVPacket *pkt)
{
AVBufferRef *buf = NULL;
--
2.16.2
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