If udp is in server mode(init local addr and port through url),
then it maybe haven't dest_addr, so we should set it after udp_read
get the client addr and port
This feature only enable when the new udp option autodetect_dest is specified
Signed-off-by: Jack Lau <jacklau1...@qq.com>
---
libavformat/udp.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavformat/udp.c b/libavformat/udp.c
index 0fde3548e7..7d05e18dcd 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -99,6 +99,7 @@ typedef struct UDPContext {
struct sockaddr_storage dest_addr;
int dest_addr_len;
int is_connected;
+ int autodetect_dest;
/* Circular Buffer variables for use in UDP receive code */
int circular_buffer_size;
@@ -143,6 +144,7 @@ static const AVOption options[] = {
{ "broadcast", "explicitly allow or disallow broadcast destination",
OFFSET(is_broadcast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
{ "ttl", "Time to live (multicast only)",
OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, 255, E },
{ "connect", "set if connect() should be called on socket",
OFFSET(is_connected), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1,
.flags = D|E },
+ { "autodetect_dest", "Auto detect destination from last received addr",
OFFSET(autodetect_dest), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, D|E },
{ "fifo_size", "set the UDP receiving circular buffer size, expressed
as a number of packets with size of 188 bytes", OFFSET(circular_buffer_size),
AV_OPT_TYPE_INT, {.i64 = 7*4096}, 0, INT_MAX, D },
{ "overrun_nonfatal", "survive in case of UDP receiving circular buffer
overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, D },
{ "timeout", "set raise error timeout, in microseconds (only in
read mode)",OFFSET(timeout), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX,
D },
@@ -1144,6 +1146,8 @@ static int udp_write(URLContext *h, const uint8_t *buf,
int size)
}
if (!s->is_connected) {
+ if (s->autodetect_dest && !s->dest_addr_len && !s->dest_addr.ss_family)
+ ff_udp_get_last_recv_addr(h, &s->dest_addr, &s->dest_addr_len);
ret = sendto (s->udp_fd, buf, size, 0,
(struct sockaddr *) &s->dest_addr,
s->dest_addr_len);
--
2.49.0
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