Re: [PATCH] 2.4.1p4 : dmasound ed21- Pismo byte-swap

Fri, Jan 19, 2001, Takashi Oe wrote:

On 1/18/01 7:47 PM, Iain Sandoe wrote:
[...]

quoted

... by comparison with the large amount of other code already in there to do
rate expansion and compression/decompression it is a relatively small price
to pay for having all pmac machines behave the same...

I know it's a small price, and some of those translations shouldn't be there
either, I think.

I think we agree well on the principles.

quoted

... at the next revision of the driver we could try issuing it with "16bit
44k1 Signed BE" only - and see how much of the desktop world works ;-)

Let's fix apps and keep the kernel lean.

---

my only justification is a case of expediency:

many apps ; one driver ; very, very few linux ppc audio developers.

---

OSS is legacy - and not well suited to expressing the PPC hardware.

I think that we should invest the littlest time in fixing legacy
  - accept that the CPU cycles have to be executed somewhere (although we
agree that should be in User mode).

So we can then apply these few developers to the future :
 - where apps will have to be expecting the translations to be carried out
in user space.
 - to solving the real problems (like making the latency sufficiently small
for professional audio work).

If and when ALSA is accepted into linux we can/will throw this current
driver away.  If it is built as a module - it has no lasting impact on the
kernel.

Iain.

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On 1/18/01 8:30 PM, Iain Sandoe wrote:

my only justification is a case of expediency:

many apps ; one driver ; very, very few linux ppc audio developers.

Do you have any hard number?  How many *popular* apps does the pismo change
break?  I don't there are so many linux audio apps to begin with.

If and when ALSA is accepted into linux we can/will throw this current
driver away.  If it is built as a module - it has no lasting impact on the
kernel.

I think ALSA will be in, but do you know for sure OSS will go away?
Besides, people will be using 2.4 for a long time, and I don't think OSS
will go away from 2.4 ever.


Takashi Oe


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