#include "packet.h"
+typedef struct PacketList {
+ struct PacketList *next;
+ AVPacket pkt;
+} PacketList;
+
+/**
+ * Append an AVPacket to the list.
+ *
+ * @param head List head element
+ * @param tail List tail element
+ * @param pkt The packet being appended. The data described in it will
+ * be made reference counted if it isn't already.
+ * @param copy A callback to copy the contents of the packet to the list.
+ May be null, in which case the packet's reference will be
+ moved to the list.
+ * @return 0 on success, negative AVERROR value on failure. On failure,
+ the packet and the list are unchanged.
+ */
+int avpriv_packet_list_put(PacketList **head, PacketList **tail,
+ AVPacket *pkt,
+ int (*copy)(AVPacket *dst, const AVPacket *src),
+ int flags);
+
+/**
+ * Remove the oldest AVPacket in the list and return it.
+ *
+ * @note The pkt will be overwritten completely on success. The caller
+ * owns the packet and must unref it by itself.
+ *
+ * @param head List head element
+ * @param tail List tail element
+ * @param pkt Pointer to an AVPacket struct
+ * @return 0 on success, and a packet is returned. AVERROR(EAGAIN) if
+ * the list was empty.
+ */
+int avpriv_packet_list_get(PacketList **head, PacketList **tail,
+ AVPacket *pkt);
+
+/**
+ * Wipe the list and unref all the packets in it.
+ *
+ * @param head List head element
+ * @param tail List tail element
+ */
+void avpriv_packet_list_free(PacketList **head, PacketList **tail);
+
int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type);
int ff_side_data_set_prft(AVPacket *pkt, int64_t timestamp);