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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi All,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>i'm seeking an advise on the preferred way to support a
dedicated DSP chip under ALSA.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The system is an embedded system constructed on a dual core
chip – one core is ARM vanlia and the other is a dedicated DSP core.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The DSP core is capable of both playing both encoded streams
(mp3, wma, various voice coders) and of course PCM streams.<br>
the codec (a2d, d2a) are connected to DSP.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I looking for an elegant design to hide the DSP under the
ALSA sysem and I have several ideas and would like to get your advise:<o:p></o:p></span></font></p>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='mso-list:l1 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>use LADSPA to make the DSP look
as a plug-in for both control and data – what I don't know is if
LADSPA forces me to return data to the ALSA for sending it to the
kernel drivers<o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l1 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>use the LADSPA to make the DSP
control only and make another kernel driver for the audio data pass
– is it possible? There can be a sync problem between the commands
and the time the data will arrive? Will this support JACKD ?<o:p></o:p></span></font></li>
</ol>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I'm open to other suggestions as well,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks in advance<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Ziv<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.25in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
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