PR #21235 opened by igutidze URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21235 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21235.patch
According to the manual, the kernel doubles requested SO_RCVBUF value set using setsockopt and this doubled value is returned by getsockopt. Take into account this effect when checking whether requested buffer size has been applied. Signed-off-by: igutidze <[email protected]> >From 92bf82522f32dc585772aaf2ef7ec284cf5fe89f Mon Sep 17 00:00:00 2001 From: igutidze <[email protected]> Date: Thu, 18 Dec 2025 18:36:51 +0000 Subject: [PATCH] udp.c: take into account doubling of SO_RCVBUF size According to the manual, the kernel doubles requested SO_RCVBUF value set using setsockopt and this doubled value is returned by getsockopt. Take into account this effect when checking whether requested buffer size has been applied. Signed-off-by: igutidze <[email protected]> --- libavformat/udp.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/libavformat/udp.c b/libavformat/udp.c index 61e80c86c5..fe725f3b4a 100644 --- a/libavformat/udp.c +++ b/libavformat/udp.c @@ -879,9 +879,10 @@ static int udp_open(URLContext *h, const char *uri, int flags) if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) { ff_log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)"); } else { - av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp); - if(tmp < s->buffer_size) - av_log(h, AV_LOG_WARNING, "attempted to set receive buffer to size %d but it only ended up set as %d\n", s->buffer_size, tmp); + /* setsockopt doubles requested value, getsockopt returns the doubled value */ + av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp / 2); + if(tmp / 2 < s->buffer_size) + av_log(h, AV_LOG_WARNING, "attempted to set receive buffer to size %d but it only ended up set as %d\n", s->buffer_size, tmp / 2); } /* make the socket non-blocking */ -- 2.49.1 _______________________________________________ ffmpeg-devel mailing list -- [email protected] To unsubscribe send an email to [email protected]
