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srtsrc: Prevent delay from being negative

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`delay` should be a GstClockTimeDiff since SRT time is int64_t.

All values are in local time so we should never see a srctime that's in
the future. If we do, clamp the delay to 0 and warn about it.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1674>
This commit is contained in:
Jan Alexander Steffens (heftig) 2020-10-12 14:15:49 +02:00 committed by GStreamer Merge Bot
parent ec11ad9d55
commit 4eeff95f92
1 changed files with 11 additions and 4 deletions
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15
ext/srt/gstsrtsrc.c
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@ -124,7 +124,7 @@ gst_srt_src_fill (GstPushSrc * src, GstBuffer * outbuf)
GstClock *clock;
GstClockTime base_time;
GstClockTime capture_time;
GstClockTime delay;
GstClockTimeDiff delay;
int64_t srt_time;
SRT_MSGCTRL mctrl;
@ -166,7 +166,7 @@ gst_srt_src_fill (GstPushSrc * src, GstBuffer * outbuf)
GST_LOG_OBJECT (src,
"recv_len:%" G_GSIZE_FORMAT " pktseq:%d msgno:%d srctime:%"
G_GUINT64_FORMAT, recv_len, mctrl.pktseq, mctrl.msgno, mctrl.srctime);
G_GINT64_FORMAT, recv_len, mctrl.pktseq, mctrl.msgno, mctrl.srctime);
if (g_cancellable_is_cancelled (self->cancellable)) {
ret = GST_FLOW_FLUSHING;
@ -198,6 +198,15 @@ gst_srt_src_fill (GstPushSrc * src, GstBuffer * outbuf)
else
delay = 0;
GST_LOG_OBJECT (src, "delay: %" GST_STIME_FORMAT, GST_STIME_ARGS (delay));
if (delay < 0) {
GST_WARNING_OBJECT (src,
"Calculated SRT delay %" GST_STIME_FORMAT " is negative, clamping to 0",
GST_STIME_ARGS (delay));
delay = 0;
}
/* Subtract the base_time (since the pipeline started) ... */
if (capture_time > base_time)
capture_time -= base_time;
@ -210,8 +219,6 @@ gst_srt_src_fill (GstPushSrc * src, GstBuffer * outbuf)
capture_time = 0;
GST_BUFFER_TIMESTAMP (outbuf) = capture_time;
GST_DEBUG_OBJECT (src, "delay:%" GST_TIME_FORMAT, GST_TIME_ARGS (delay));
gst_buffer_resize (outbuf, 0, recv_len);
GST_LOG_OBJECT (src,