Empia em28xx based USB video device... (2)

Empia em28xx based USB video device... (2)

[Mat]

Hi all.
How do I test if the current driver support a specific kind of field type?

The device I'm working with seems to work only in interlaced mode.
V4L2_FIELD_NONE is ignored.

 From v4l-info:

video capture
    VIDIOC_ENUM_FMT(0,VIDEO_CAPTURE)
        index                   : 0
        type                    : VIDEO_CAPTURE
        flags                   : 0
        description             : "Packed YUY2"
        pixelformat             : 0x56595559 [YUYV]
    VIDIOC_G_FMT(VIDEO_CAPTURE)
        type                    : VIDEO_CAPTURE
        fmt.pix.width           : 720
        fmt.pix.height          : 576
        fmt.pix.pixelformat     : 0x56595559 [YUYV]
        fmt.pix.field           : INTERLACED
        fmt.pix.bytesperline    : 1440
        fmt.pix.sizeimage       : 829440
        fmt.pix.colorspace      : SMPTE170M
        fmt.pix.priv            : 0

Is it a module driver limit or an hardware limit?
In Windows it seems ok... I don't think VLC ( I use it for testing on 
Win ) de-interlace automatically.

Ideas?
I have to de-interlace myself the frames I suppose...

Thanks in advance.
-Mat-

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Re: Empia em28xx based USB video device... (2)

[Markus Rechberger]

On 4/22/08, Mat <heavensdoor78@gmail.com> wrote:
>
> Hi all.
> How do I test if the current driver support a specific kind of field type?
>
> The device I'm working with seems to work only in interlaced mode.
> V4L2_FIELD_NONE is ignored.
>
>  From v4l-info:
>
> video capture
>     VIDIOC_ENUM_FMT(0,VIDEO_CAPTURE)
>         index                   : 0
>         type                    : VIDEO_CAPTURE
>         flags                   : 0
>         description             : "Packed YUY2"
>         pixelformat             : 0x56595559 [YUYV]
>     VIDIOC_G_FMT(VIDEO_CAPTURE)
>         type                    : VIDEO_CAPTURE
>         fmt.pix.width           : 720
>         fmt.pix.height          : 576
>         fmt.pix.pixelformat     : 0x56595559 [YUYV]
>         fmt.pix.field           : INTERLACED
>         fmt.pix.bytesperline    : 1440
>         fmt.pix.sizeimage       : 829440
>         fmt.pix.colorspace      : SMPTE170M
>         fmt.pix.priv            : 0
>
> Is it a module driver limit or an hardware limit?
> In Windows it seems ok... I don't think VLC ( I use it for testing on
> Win ) de-interlace automatically.
>
> Ideas?
> I have to de-interlace myself the frames I suppose...
>

The driver delivers full frames already since many TV applications
don't support deinterlacing of halfframes at all. That way is
hardcoded at the moment.

Markus

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