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Code Issues Releases Activity

avcodec/packet: add functionality to prepend to AVPacketLists

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Signed-off-by: Jan Ekström <jan.ekstrom@24i.com>
This commit is contained in:
Jan Ekström
2019-09-24 14:32:36 +03:00
committed by Jan Ekström
parent 5c222d7ade
commit 8dcc65a0fc
2 changed files with 17 additions and 5 deletions
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14
libavcodec/packet.c
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@@ -550,6 +550,7 @@ int avpriv_packet_list_put(PacketList *packet_buffer,
int flags) int flags)
{ {
PacketListEntry *pktl = av_malloc(sizeof(*pktl)); PacketListEntry *pktl = av_malloc(sizeof(*pktl));
unsigned int update_end_point = 1;
int ret; int ret;
if (!pktl) if (!pktl)
@@ -573,13 +574,22 @@ int avpriv_packet_list_put(PacketList *packet_buffer,
pktl->next = NULL; pktl->next = NULL;
if (packet_buffer->head) 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; packet_buffer->tail->next = pktl;
else }
} else
packet_buffer->head = pktl; packet_buffer->head = pktl;
if (update_end_point) {
/* Add the packet in the buffered packet list. */ /* Add the packet in the buffered packet list. */
packet_buffer->tail = pktl; packet_buffer->tail = pktl;
}
return 0; return 0;
} }

2
libavcodec/packet_internal.h
View File

@@ -34,6 +34,8 @@ typedef struct PacketList {
PacketListEntry *head, *tail; PacketListEntry *head, *tail;
} PacketList; } PacketList;
#define FF_PACKETLIST_FLAG_PREPEND (1 << 0) /**< Prepend created AVPacketList instead of appending */
/** /**
* Append an AVPacket to the list. * Append an AVPacket to the list.
* *