timeline: Added manpage

src/channel/meson.build

@@ -55,6 +55,7 @@ mansources = [
 	'stream-client.rst',
 	'tcp.rst',
 	'timeit.rst',
+	'timeline.rst',
 	'timer.rst',
 	'udp.rst',
 	'yaml.rst',

src/channel/timeline.rst

@@ -0,0 +1,33 @@
+tll-channel-timeline
+====================
+
+:Manual Section: 7
+:Manual Group: TLL
+:Subtitle: Delay messages for period between time fields 
+
+Synopsis
+--------
+
+``timeline+CHILD://PARAMS...;speed=<float>``
+
+
+Description
+-----------
+
+Prefix channel that delays messages according to their ``time`` fields. Its purpose is to
+emulate real world load by replaying recorded data where simple rate limiter is not sufficient.
+Delay is calculated as ``(m[n+1].time - m[n].time) / speed`` starting from first message.
+
+Init parameters
+~~~~~~~~~~~~~~~
+
+``speed=<float>`` default ``1.0``, speed of data stream compared to ``time`` fields, larger values
+means that delay is smaller.
+
+See also
+--------
+
+``tll-channel-common(7)``
+
+..
+    vim: sts=4 sw=4 et tw=100