[maemo-developers] ALSA sound driver for Nokia 770 and DSP programming

[From: Felipe Contreras]

On Fri, Sep 26, 2008 at 12:06 AM, Siarhei Siamashka
<siarhei.siamashka at gmail.com> wrote:
> On Thursday 25 September 2008, Felipe Contreras wrote:
>> On Thu, Sep 25, 2008 at 10:07 PM, Siarhei Siamashka
> [...]
>> > Now regarding why we may want it. Once if we get a good, low latency,
>> > fully functional and reliable ALSA sound driver running on ARM, it gives
>> > maemo community a nice possibility to scrap all the proprietary DSP
>> > binaries. This provides us with a new and shiny 252MHz C55x DSP core
>> > ready to be used by something else :)
>> >
>> > Free linux DSP toolchain from TI [4] supports generation of both DSP
>> > kernel and DSP tasks for OMAP1 based devices which is sufficient for DSP
>> > development. The toolchain license was supposed to permit open source
>> > development (with noncommercial restriction), though the license text
>> > itself is a bit questionable [5].
>> >
>> > With DSP avalable for use and having no need to spend efforts on ensuring
>> > compatibility and peaceful coexistence with proprietary binary codecs
>> > (free and proprietary code does not mix well), it should be possible to
>> > turn Nokia 770 into quite a powerful media player.
>>
>> Great stuff!
>>
>> Do you plan to use the dsp-gateway or dsp-bridge?
>
> Now as you mentioned that, it indeed makes sense to consider other
> alternatives if they exist. Do you have any links to the information about
> dspgateway vs. dspbridge comparison (features/performance/reliability)?
>
> Using dspgateway has a clear advantage that it is already included in the
> kernel. And dspgateway is more or less ok, though patching it a bit in order
> to improve performance will be required.

Not really, but I've been thinking that a comparison would be useful.
Perhaps some dummy DSP nodes and clients to test them on both would
help. I have one for the dsp-bridge, but not dsp-gateway.


-- 
Felipe Contreras