[Bug 793787] [gstreamer-msdk-master][SKL] some cases mjpeg decoding fail with error message "jpegparse0: Internal data stream error".

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=793787

--- Comment #5 from sreerenj <bsreerenj at gmail.com> ---
The issue is that jpeg parser is not reading the header and decoder is not
getting the width/height information from caps.
Providing width/height in capsfilter will fix the issue for conformance
testing.

eg: 
gst-launch-1.0 filesrc location= 394939.jpg ! jpegparse ! image/jpeg,
width=500, height=330 !  msdkmjpegdec ! videoconvert ! ximagesink

The proper fix can be done in two ways:

1: Investigate why jpegparser is failing and get a fix in parser so that we
don't need to add anything in decoder side.

Pros: decoder code will be simple, no need to header parsing with msdk which
will help to avoid start-up(if any) delay.

Cons: always will have a tight dependency to parser. 

2: Use MSDK routines to extract headers from jpeg stream without relying on
parser output. This requires changes in current decoder code flow.

Pros: No dependency on parser output

Cons: Will make the decoder implementation bit more complicated.

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