Date: Tue, 3 Jan 2012 22:28:18 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: Matthias Apitz <guru@unixarea.de> Cc: freebsd-multimedia@freebsd.org Subject: Re: webcamd/cuse4bsd && Skype Message-ID: <201201032228.19293.hselasky@c2i.net> In-Reply-To: <20120103181538.GA3129@tinyCurrent> References: <20120101164408.GA2389@tinyCurrent> <201201030924.08045.hselasky@c2i.net> <20120103181538.GA3129@tinyCurrent>
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On Tuesday 03 January 2012 19:15:38 Matthias Apitz wrote:
> El d=EDa Tuesday, January 03, 2012 a las 09:24:08AM +0100, Hans Petter Se=
lasky=20
escribi=F3:
> > Hi,
> >=20
> > > (u32)(long)arg, when passing to IOCTL functions.
> >=20
> > I meant printing the "cmd" value. "arg" value can be negative if a
> > pointer is passed along.
> >=20
> > Try to figure out which ioctl is failing. Maybe run webcamd from gdb and
> > add some code you can break-point on, then single step.
>=20
> Hi,
>=20
Hi,
> The failing ioctls are (only 2 are sent down from Skype):
>=20
> Creating /dev/video0
> mydebug: v4b_open fflags: 00000003
> mydebug: linux_open: handle=3D28c08600
> mydebug: v4b_ioctl: handle=3D28c08600 cmd=3D0x40047601
> mydebug: linux_ioctl returns: error=3Dffffffea
> mydebug: v4b_convert_error: CUSE_ERR_INVALID
#define VIDIOC_G_FMT _IOWR('V', 4, struct v4l2_format)
#define VIDIOC_S_CROP _IOW('V', 60, struct v4l2_crop)
Try to print the two above IOCTL's and see if they match.
It might be a compile issues that some structures have different sizes than=
=20
expected.
> mydebug: v4b_ioctl: handle=3D28c08600 cmd=3D0x403c7601
> mydebug: linux_ioctl returns: error=3Dffffffea
> mydebug: v4b_convert_error: CUSE_ERR_INVALID
> mydebug: v4b_close: handle=3D28c08600
>=20
> (cmd is printed as 'cmd=3D0x%08x')
The cmds are defined in the header files in /usr/local/include/linux/*/*
Also there might be a module parameter that will get you more debugging inf=
o=20
from the UVC/PWC driver. Check output from "webcamd -s".
=2D-HPS
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