[Bug 729764] pnmdec: Not respecting downstream rowstride

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=729764
  GStreamer | gst-plugins-bad | git

--- Comment #4 from Sanjay NM <sanjay.nm at samsung.com> 2014-05-21 05:19:12 UTC ---
Thanks for your review. At present pnmdec always aligns rowstride to 4 and then
returns this buffer. If width is say 1919, considering bits per pixel of 3
rowstride becomes 1919 * 3 = 5757. This at present is getting adjusted to 5760
(multiple of 4) and then buffer gets returned. Sorry for confusing by saying
width becomes 1920 (5760/4 = 1920). I have updated the patch to take an input
parameter rowstrideorig. If this is set to TRUE then pnmdec will not align
rowstride to 4 but will return the original (width * bpp) number of bytes.
If no parameter is passed then the behavior is same as before. That is it will
make the rowstride alignment to 4 and return. This is more of an enhancement.

I have tested the decoder by using following commands and it is working well.

gst-launch-1.0 filesrc location=odd.pnm ! pnmdec rowstrideorig=TRUE ! filesink
location=out.raw

gst-launch-1.0 filesrc location=odd.pnm ! pnmdec ! filesink location=out.raw

I will create separate patches for your suggestions to use GstAdapter.

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