Commit graph

26 commits

Author SHA1 Message Date
Nirbheek Chauhan
cf786a9399 compositor: Ensure all arguments to CLAMP are signed int
If any of the arguments to CLAMP are unsigned integers, the comparison causes
an automatic conversion of the signed int to unsigned, which causes -1 to become
UINT_MAX and get clamped to the high value of the CLAMP instead of 0.

See 716 at http://c0x.coding-guidelines.com/6.3.1.8.html

Also add a test for this.

https://bugzilla.gnome.org/show_bug.cgi?id=754576
2015-09-04 23:32:36 +02:00
Nirbheek Chauhan
db49716c70 compositor: variables in clamp_rectangle() should be signed
x/y/w/h are signed integers. As can be seen in GstCompositorPad.
The prototype for clamp_rectangle was wrong. This commit reverts the change
and fixes the prototype.

This reverts commit bca444ea4a.
2015-08-29 17:27:45 +01:00
Luis de Bethencourt
bca444ea4a compositor: remove check for below zero for unsigned value
CLAMP checks both if value is '< 0' and '> max'. Value will never be a negative
number since it is an unsigned integer. Removing that check and only checking if
it is bigger than max by using MIN().

CID 1320707
2015-08-28 15:21:13 +01:00
Nirbheek Chauhan
9b59bb8630 compositor: Actually use the output resolution for clamping
The obscured check in compositor was using the dimensions of the pad to clamp
the h/w of the pad instead of the output resolution, and was doing an incorrect
calculation to do so. Fix that by simplifying the whole calculation by using
corner coordinates. Also add a test for this bug which fell through the cracks,
and just skip all the obscured tests if the pad's alpha is 0.0.

https://bugzilla.gnome.org/show_bug.cgi?id=754107
2015-08-26 15:03:05 +03:00
Mathieu Duponchelle
53b0808042 compositor: update zorder documentation.
It is not bound between 0 and 10000 anymore.
2015-06-14 23:20:38 +02:00
Sebastian Dröge
3230e51993 compositor/glvideomixer: Don't calculate PAR/DAR with unset GstVideoInfos
Otherwise we divide by zero.
2015-05-21 16:24:48 +03:00
Sebastian Dröge
41c11e3979 compositor: Fix double assignment 2015-05-21 16:19:08 +03:00
Matthew Waters
d1419afef1 compositor/glvideomixer: fix up par handling
We were using the wrong formula

https://bugzilla.gnome.org/show_bug.cgi?id=749634
2015-05-21 01:04:38 +10:00
Stefan Sauer
4116d11327 Revert "doc: Workaround gtkdoc issue"
This reverts commit ff6c736fe0.

This is fixed by the gtk-doc 1.23 release.

<para> cannot contain <refsect2>:
http://www.docbook.org/tdg/en/html/para.html
http://www.docbook.org/tdg/en/html/refsect2.html
2015-05-18 20:16:32 +02:00
Nicolas Dufresne
ff6c736fe0 doc: Workaround gtkdoc issue
With gtkdoc 1.22, the XML generator fails when a itemizedlist is
followed by a refsect2. Workaround the issue by wrapping the
refsect2 into para.
2015-05-16 23:38:14 -04:00
Matthew Waters
0871b7b43d compositor: implement proper par handling
We were previously failing on different input and output par
2015-05-14 14:58:07 +10:00
Matthew Waters
c519169052 compositor: fix rectangle obscure test to clamp against the output frame size
Rather than one of the input pad video info's.

The test checking this was not constraining the output frame size
to ensure that the out of frame stream was not being displayed.
2015-05-13 17:44:30 +10:00
Nirbheek Chauhan
1c60de8ad7 compositor: Only map the frame from a buffer if it will be used
It's a waste of resources to map it if it won't be converted
or used at all. Since we moved the frame mapping down, we need
to use the GST_VIDEO_INFO accessor macros now in the code above
that instead of the GST_VIDEO_FRAME accessor macros.

https://bugzilla.gnome.org/show_bug.cgi?id=746147
2015-05-01 11:27:55 +01:00
Nirbheek Chauhan
cc2de817ae compositor: use accessor macros for consistency
https://bugzilla.gnome.org/show_bug.cgi?id=746147
2015-05-01 10:57:08 +01:00
Nirbheek Chauhan
e0fd23cb23 compositor: Skip pads that are completely obscured by a higher zorder pad
For each frame, compare the frame boundaries, check if the format contains an
alpha channel, check opacity, and skip the frame if it's going to be completely
overwritten by a higher zorder frame. The check is O(n^2), but that doesn't
matter here because the number of sinkpads is small.

More can be done to avoid needless drawing, but this covers the majority of
cases. See TODOs. Ideally, a reverse painter's algorithm should be used for
optimal drawing, but memcpy during compositing is small compared to the CPU used
for frame conversion on each pad.

https://bugzilla.gnome.org/show_bug.cgi?id=746147
2015-05-01 10:56:32 +01:00
Nirbheek Chauhan
29975746dc compositor: Document the zorder pad property from gstvideoaggregator 2015-01-14 19:21:36 +01:00
Sebastian Dröge
ddb535c35d compositor: Don't do any conversions if the pad is completely transparent anyway 2015-01-13 14:54:26 +01:00
Nirbheek Chauhan
ad1a25ba37 compositor: Document the pad properties 2014-12-27 11:04:52 +00:00
Sebastian Dröge
ccaf07d53d compositor: Fix memory leak when no buffer is available for a pad currently
CID 1258718
2014-12-18 11:49:09 +01:00
Sebastian Dröge
d4c4af699e aggregator: Add a timeout parameter to ::aggregate()
When this is TRUE, we really have to produce output. This happens
in live mixing mode when we have to output something for the current
time, no matter if we have enough input or not.
2014-12-17 18:41:41 +01:00
Sebastian Dröge
06013a0a6c compositor: Failure to map a video frame is not just a warning
Also add some warning debug output if mapping a output buffer fails
2014-11-28 10:23:55 +01:00
Sebastian Dröge
2a5aed6966 compositor: Implement rescaling of the input via pad properties
compositor has now the same interface as glvideomixer.
2014-11-27 21:23:04 +01:00
Sebastian Dröge
debf5340bb compositor: Remove unused zorder pad property
It's handled in videoaggregator already.
2014-11-26 12:42:24 +01:00
Sebastian Dröge
7eef9dd0ad compositor: GstVideoMeta is supported just fine, tell upstream about that
Also provide a GstVideoBufferPool to upstream just in case.
2014-11-25 19:03:21 +01:00
Matthew Waters
f0caf04ad6 videoaggregator: operate on caps rather than video info
Otherwise the CapsFeatures will be lost along with the possibility
of multiple output types and formats.

https://bugzilla.gnome.org/show_bug.cgi?id=738129
2014-10-21 01:14:36 +11:00
Mathieu Duponchelle
11fa711c34 compositor: Add a new compositor based on the new GstVideoAggregator base class
It is a replacement for videomixer with a similare API

Co-Authored by: Thibault Saunier <tsaunier@gnome.org>

https://bugzilla.gnome.org/show_bug.cgi?id=731919
2014-06-20 19:53:33 +02:00