[gstreamer-bugs] [Bug 442654] New: [volume] controller bypassed by default

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: 0.10.12
           Summary: [volume] controller bypassed by default
           Product: GStreamer
           Version: 0.10.12
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: sphink at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


I'm just starting out trying to use gstreamer, and I believe I ran into a bug
in the volume plugin. If you leave the volume set to the default (1.0), it
calls gst_base_transform_set_passthrough() to set a passthrough property to
true. When this is true, volume_transform_ip() just returns. Unfortunately,
this bypasses gst_object_sync_values(). As a result, if the volume starts out
at 1.0 but you try to use a GstController to tweak the value over time, the
controller is completely ignored.

My current workaround is to set the initial volume to 1.01, but I'm afraid that
if the controller ever happened to set the volume to 1.0 (or close to it in a
16-bit int), then it would kill all future updates.


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