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| author | Vincent Bernat <vincent@bernat.im> | 2014-05-23 15:26:32 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-11-27 19:53:09 +0100 |
| commit | 5269cef4087f3e46e734eb5dfc38085e630514d9 (patch) | |
| tree | 30dd5c8d1f1c0ad2f308a1d867e431bd27cfe172 | |
| parent | 970a8f1c256f08d2f6414d573a54f2fa035c8e7a (diff) | |
| download | ffmpeg-5269cef4087f3e46e734eb5dfc38085e630514d9.tar.gz | |
avformat/udp: Allow to specify DSCP class
By appending `?dscp=26` to the URL, IP packets will be classified as
AF31 (assured forwarding for multimedia flows with low probability of
loss). On congested network, this allows a user to assign priorities to
flows.
Signed-off-by: Vincent Bernat <vincent@bernat.im>
| -rw-r--r-- | libavformat/udp.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/libavformat/udp.c b/libavformat/udp.c index 828b741782..91c7910a95 100644 --- a/libavformat/udp.c +++ b/libavformat/udp.c @@ -556,7 +556,7 @@ static int parse_source_list(char *buf, char **sources, int *num_sources, static int udp_open(URLContext *h, const char *uri, int flags) { char hostname[1024], localaddr[1024] = ""; - int port, udp_fd = -1, tmp, bind_ret = -1; + int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1; UDPContext *s = h->priv_data; int is_output; const char *p; @@ -612,6 +612,9 @@ static int udp_open(URLContext *h, const char *uri, int flags) if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { s->is_connected = strtol(buf, NULL, 10); } + if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) { + dscp = strtol(buf, NULL, 10); + } if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) { s->circular_buffer_size = strtol(buf, NULL, 10); if (!HAVE_PTHREAD_CANCEL) @@ -695,6 +698,12 @@ static int udp_open(URLContext *h, const char *uri, int flags) av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available"); } + if (dscp >= 0) { + dscp <<= 2; + if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0) + goto fail; + } + /* If multicast, try binding the multicast address first, to avoid * receiving UDP packets from other sources aimed at the same UDP * port. This fails on windows. This makes sending to the same address |