[Bug 708889] New: Add "smart-properties" property in playbin

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=708889
  GStreamer | gst-plugins-base | git

           Summary: Add "smart-properties" property in playbin
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: hoonh83.lee at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Overview:
I just wanted to set some properties to demuxer or parser or other elements in
uridecodebin before PAUSE state.
For this, I had to find a element that I wanted to set one by one and I could
set a value of property using bus message.

So, I Added "smart-properties" property in playbin.
This property makes to be possible that all of elements in uridecodebin
can set directly their's properties while auto-plugging.
A property should be comprised of key and value and split by ':' delimiter.
All of properties should be split by ',' delimiter.

Expected Results:
1. gst-launch1.0 playbin uri="xxx"
smart-properties="program-number:3,emit-stats:TRUE"
2. It is stored to hash table after parsing.
3. While auto-plugging, if there is a matched name of property in a element
that is from uridecodebin with hash table, the element starts to set a value of
property.

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