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rtpdec: Simplify insertion into the linked list queue

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By using a pointer-to-pointer, we avoid having to keep track
of the previous packet separately.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö
2012-12-07 16:19:42 +02:00
parent 62761934b0
commit d0fe217e39
1 changed files with 6 additions and 10 deletions
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16
libavformat/rtpdec.c
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@@ -723,15 +723,14 @@ void ff_rtp_reset_packet_queue(RTPDemuxContext *s)
static void enqueue_packet(RTPDemuxContext *s, uint8_t *buf, int len) static void enqueue_packet(RTPDemuxContext *s, uint8_t *buf, int len)
{ {
uint16_t seq = AV_RB16(buf + 2); uint16_t seq = AV_RB16(buf + 2);
RTPPacket *cur = s->queue, *prev = NULL, *packet; RTPPacket **cur = &s->queue, *packet;
/* Find the correct place in the queue to insert the packet */ /* Find the correct place in the queue to insert the packet */
while (cur) { while (*cur) {
int16_t diff = seq - cur->seq; int16_t diff = seq - (*cur)->seq;
if (diff < 0) if (diff < 0)
break; break;
prev = cur; cur = &(*cur)->next;
cur = cur->next;
} }
packet = av_mallocz(sizeof(*packet)); packet = av_mallocz(sizeof(*packet));
@@ -741,11 +740,8 @@ static void enqueue_packet(RTPDemuxContext *s, uint8_t *buf, int len)
packet->seq = seq; packet->seq = seq;
packet->len = len; packet->len = len;
packet->buf = buf; packet->buf = buf;
packet->next = cur; packet->next = *cur;
if (prev) *cur = packet;
prev->next = packet;
else
s->queue = packet;
s->queue_len++; s->queue_len++;
} }