[linux-dvb] Re: V4 API proposal

["Haber, Thomas" <THaber@tee.toshiba.de>]

Hi Rob,

Rob.McConnell wrote:

> 5.  Output control.  I think we need to have another look at 
> this again.
> When setting up a PID filter what type of output should be 
> delivered to the
> internal queue?  My h/w supports the following types in 
> addition to the
> dedicated A/V decoder streams (DMX_OUT_DECODER):
> 
>       a) Full 188 bytes TS packets - yup, this is the same as 
> setting the
> output to DMX_OUT_TS_TAP.
>       b) Header and adaptation fields only - useful for interrogating
> fields without having to have the full payload dumped into memory and
> copied
>                 about endless times.
>       c) Just the payload.
>       d) table sections with our without filtering.
>       e) The h/w also supports a "dump" queue that can be 
> configured to
> allow parts of a TS from other PIDs to be dumped into it.  
> For example,
>                  it is possible to configure the h/w so that 
> the payload
> goes off to one queue and the header/adaptation fields are 
> delivered to
> this
>                  general dump queue.
> 

We should avoid to make the driver hardware dependend !!!


> 6. Another device to support PSs for MPEG-1 and MPEG-2 
> formats would be
> desirable and should be implemented in kernel space to take 
> any advantages
> of the available h/w.   For devices that don't have a h/w 
> filter for the
> stream id/etc. then this should be implemented in s/w (kernel 
> space) to
> keep the api consistent.  For PS material this is likely to 
> be from a HDD,
> CDROM, DVD, ... that should have DMA capability, so it would 
> make sense to
> keep it all in kernel space with ioctls to choose the 
> filtering capability
> and to read the filtered PS back.

Yes this needs to be inside, but still the questeion in one device or two ?

> Do we currently support Audio ES in the API?   If not, then 
> this needs to
> be added as my h/w supports this.
> 

When i look at the audio decoder device i also ask this question!  


Regards,

thomas 


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