[linux-dvb] Re: decoder & frontend ioctls

[Marcus Metzler <mocm@mocm.de>]

>>>>> "Marcel" == Marcel Siegert <mws@renzel.net> writes:

    Marcel> On Wednesday 07 July 2004 20:15, Marcus Metzler wrote:
    >> >>>>> "Marcel" == Marcel Siegert <mws@renzel.net> writes:
    >> 
    Marcel> Hi, can someone explain why DVB ApiV3 is not providing
    Marcel> IOCTL's for getting e.g.
    >>
    Marcel> the bitrate of the stream, resolution ect. ?
    >> What bitrate?
    Marcel> Your are right, I was thinking e.g. about PES bitrates.
    Marcel> Also on H by V resolution ect.

    Marcel> In my special case i have got a /proc/bus/bitstream
    Marcel> interface which is filled with data within the driver
    Marcel> code, because the HW is supporting these data.

    Marcel> On a second (but different Model) STB it is the same
    Marcel> interface.

    Marcel> While I do not know exactly if dvb-s cards can measure
    Marcel> these things in hw or if there are registers which can be
    Marcel> read on DVB-S i must/would have to implement it in a
    Marcel> different way (Filter...).

    Marcel> My suggestion was to have a api command to get a
    Marcel> structure. if the driver supports to provide me with these
    Marcel> info i would have a simplified interface to get this
    Marcel> information.

So you what you really want is the sequence header.
I think that this belongs to the v4l/v4l2 driver part of a hardware
decoder (why else would the hardware support such data). Since all this
has to do with displaying and formating the picture. Some may argue
that it should be in in the video driver of the DVB decoder, but since
I think that should be replaced by a software/local frontend I would
say that v4l/v4l2 is the right place.


Marcus

-- 
/--------------------------------------------------------------------\
| Dr. Marcus O.C. Metzler        |                                   |
| mocm@metzlerbros.de            | http://www.metzlerbros.de/        |
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