V4L2_PIX_FMT_MPEG and S_FMT

[Christian Gmeiner]

Hi all,

I am still in the process of porting a driver to v4l2 framework. This
device is capable of decoding MPEG-1 and MPEG-2 streams.
See http://dxr3.sourceforge.net/about.html for more details.
So I have programmed this:

static int vidioc_enum_fmt_vid_out(struct file *file, void *fh,
                                struct v4l2_fmtdesc *fmt)
{
        if (fmt->index > 0)
                return -EINVAL;

        fmt->flags = V4L2_FMT_FLAG_COMPRESSED;
        fmt->pixelformat = V4L2_PIX_FMT_MPEG;
        strlcpy(fmt->description, "MPEG 1/2", sizeof(fmt->description));

        return 0;
}

There is nothing in struct v4l2_format which indicates MPEG1, MPEG2 or
MPEG4. As a result
of this, it is not possible to return -EINVAL if somebody wants to
decode/playback MPEG4 content.

Any ideas how to achieve it?

Thanks
--
Christian Gmeiner, MSc
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