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  1. 08 2月, 2019 26 次提交
  3. 01 2月, 2019 3 次提交
    • M
      media: vim2m: allow setting the default transaction time via parameter · f0ef022c
      由 Mauro Carvalho Chehab 提交于 
      While there's a control to allow setting it at runtime, as the
control handler is per file handler, only the application setting
the m2m device can change it. As this is a custom control, it is
unlikely that existing apps would be able to set it.

Due to that, and due to the fact that v4l2-mem2mem serializes all
accesses to a m2m device, trying to setup two GStreamer
v4l2videoconvert instance at the same time will cause frame drops.

So, add an alternate way of setting its default via a modprobe parameter.
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      f0ef022c
    • M
      media: vim2m: use per-file handler work queue · b3e64e5b
      由 Mauro Carvalho Chehab 提交于 
      It doesn't make sense to have a per-device work queue, as the
scheduler should be called per file handler. Having a single
one causes failures if multiple streams are filtered by vim2m.

So, move it to be inside the context structure.
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      b3e64e5b
    • M
      media: vim2m: fix driver for it to handle different fourcc formats · 8aa153f1
      由 Mauro Carvalho Chehab 提交于 
      Despite vim2m is reporting that it supports RGB565BE and YUYV,
that's not true.

Right now, it just says that it supports both format, but it
doesn't actually support them.

Also, horizontal flip is not properly implemented. It sounds
that it was designed to do a pseudo-horizontal flip using 8
tiles. Yet, as it doesn't do format conversion, the result
is a mess.

I suspect that it was done this way in order to save CPU time,
at the time of OMAP2 days.

That's messy and doesn't really help if someone wants to
use vim2m to test a pipeline.

Worse than that, the unique RGB format it says it supports is
RGB565BE, with is not supported by Gstreamer. That prevents
practical usage of it, even for tests.

So, instead, properly implement fourcc format conversions,
adding a few more RGB formats:

	- RGB and BGR with 24 bits
	- RGB565LE (known as RGB16 at gstreamer)

Also allows using any of the 5 supported formats as either
capture or output.

Note: The YUYV conversion routines are based on the conversion code
written by Hans de Goede inside libv4lconvert (part of v4l-utils),
released under LGPGL 2.1 (GPL 2.0 compatible).

Tested all possible format combinations except for RGB565BE,
as Gstreamer currently doesn't support it.
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      8aa153f1
  5. 31 1月, 2019 11 次提交