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Allow the UDP socket buffer size to be adjusted using a 

'buffer_size' URL option.

Patch by Jindrich Makovicka, makovick at gmail dot com

Originally committed as revision 15807 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Jindřich Makovička 2008-11-12 21:40:53 +00:00 committed by Andreas Öman
parent 2ae7e12430
commit 236bb1ab01
1 changed files with 11 additions and 3 deletions
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14
libavformat/udp.c
View File

@ -44,6 +44,7 @@
typedef struct {
int udp_fd;
int ttl;
int buffer_size;
int is_multicast;
int local_port;
int reuse_socket;
@ -358,6 +359,8 @@ static int udp_open(URLContext *h, const char *uri, int flags)
h->priv_data = s;
s->ttl = 16;
s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
p = strchr(uri, '?');
if (p) {
s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p);
@ -370,6 +373,9 @@ static int udp_open(URLContext *h, const char *uri, int flags)
if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
h->max_packet_size = strtol(buf, NULL, 10);
}
if (find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
s->buffer_size = strtol(buf, NULL, 10);
}
}
/* fill the dest addr */
@ -416,7 +422,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
if (is_output) {
/* limit the tx buf size to limit latency */
tmp = UDP_TX_BUF_SIZE;
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
av_log(NULL, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno));
goto fail;
@ -424,8 +430,10 @@ static int udp_open(URLContext *h, const char *uri, int flags)
} else {
/* set udp recv buffer size to the largest possible udp packet size to
* avoid losing data on OSes that set this too low by default. */
tmp = UDP_MAX_PKT_SIZE;
setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp));
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
av_log(NULL, AV_LOG_WARNING, "setsockopt(SO_RECVBUF): %s\n", strerror(errno));
}
}
s->udp_fd = udp_fd;