From: Jan Ekström <jan.ekst...@24i.com>
Signed-off-by: Jan Ekström <jan.ekst...@24i.com>
---
libavcodec/avpacket.c | 20 +++++++++++++++-----
libavcodec/packet_internal.h | 2 ++
2 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
index 9ec1feb068..21e80416de 100644
--- a/libavcodec/avpacket.c
+++ b/libavcodec/avpacket.c
@@ -540,6 +540,7 @@ int avpriv_packet_list_put(PacketList *packet_buffer,
int flags)
{
PacketListEntry *pktl = av_malloc(sizeof(*pktl));
+ unsigned int update_end_point = 1;
int ret;
if (!pktl)
@@ -563,13 +564,22 @@ int avpriv_packet_list_put(PacketList *packet_buffer,
pktl->next = NULL;
- if (packet_buffer->head)
- packet_buffer->tail->next = pktl;
- else
+ if (packet_buffer->head) {
+ if (flags & FF_PACKETLIST_FLAG_PREPEND) {
+ pktl->next = packet_buffer->head;
+ packet_buffer->head = pktl;
+ update_end_point = 0;
+ } else {
+ packet_buffer->tail->next = pktl;
+ }
+ } else
packet_buffer->head = pktl;
- /* Add the packet in the buffered packet list. */
- packet_buffer->tail = pktl;
+ if (update_end_point) {
+ /* Add the packet in the buffered packet list. */
+ packet_buffer->tail = pktl;
+ }
+
return 0;
}
diff --git a/libavcodec/packet_internal.h b/libavcodec/packet_internal.h
index 52fa6d9be9..9c0f4fead5 100644
--- a/libavcodec/packet_internal.h
+++ b/libavcodec/packet_internal.h
@@ -34,6 +34,8 @@ typedef struct PacketList {
PacketListEntry *head, *tail;
} PacketList;
+#define FF_PACKETLIST_FLAG_PREPEND (1 << 0) /**< Prepend created AVPacketList
instead of appending */
+
/**
* Append an AVPacket to the list.
*
--
2.41.0
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