[pulseaudio-discuss] How to avoid module-echo-cancel's "Echo-Cancel Source Stream" being created on a monitor source of an ALSA sink? If module-echo-cancel is loaded before the ALSA source is created.

[ABDUL MOIZ]

Hi Lin,
               Can you please send me the link for the working pulse audio
source code(with echo cancel) as I am also working to get echo cancel module
work on my OMAP4 panda board.

Thanks,

Regards,
Abdul Moiz

On Thu, Jul 28, 2011 at 11:20 AM, Lin, Mengdong <mengdong.lin at intel.com>wrote:

> I found the module-echo-cancel's "Echo-Cancel Source Stream" can be created
> on a monitor source of an new created ALSA sink by mistake, if the real ALSA
> source is not created yet. ****
>
> Could anyone tell me how to fix this issue?****
>
> ** **
>
> On my MeeGo platform, the ALSA sink/source don’t always exist because the
> ALSA and Bluetooth HSP headset share one hardware data link. So when BT HSP
> headset is connected, ALSA card will change into a “hsp” profile , remove
> the “normal” ALSA sink/source pair and create a “hsp” sink/source pair for
> BT. And after BT HSP headset is disconnected, ALSA card restores its
> original profile, remove “hsp” sink/source and create “normal” ALSA
> sink/source again.****
>
> ** **
>
> My problem is that when BT HSP is disconnected during a phone call, I got
> the above routing error and a pa deadlock described in another loop:
> http://lists.freedesktop.org/archives/pulseaudio-discuss/2011-July/010741.html
> ****
>
> The module-echo-cancel is loaded again when the VOIP stream is routing back
> to the new created ALSA sink. But because the ALSA source is not created yet
> (will be later), PA routes the “Echo-Cancel Source Stream” to the monitor
> source of the ALSA sink.****
>
> ** **
>
> How to make “Echo-Cancel Source Stream” link to the right ALSA source,
> which will be created a little later?****
>
> ** **
>
> Here is the log:****
>
> I  source.c: Created source 8
> "alsa_output.platform-pmic_audio.19.intelmadihfheadset.echo-cancel.monitor"
> with sample spec s16le 2ch 44100Hz and channel map front-left,front-right*
> ***
>
> I  source.c:     device.description = "Monitor of Echo-Cancel Sink
> alsa_output.platform-pmic_audio.19.intelmadihfheadset.echo-cancel on Intel
> MAD intelmadihfheadset"****
>
> I  source.c:     device.class = "monitor"****
>
> I  source.c:     device.icon_name = "audio-input-microphone"****
>
> D  classify.c: find_group_for_client (|<null>|0|-1|) => othermedia****
>
> D  module-suspend-on-idle.c: Sink
> alsa_output.platform-pmic_audio.19.intelmadihfheadset becomes busy.****
>
> D  memblockq.c: memblockq requested: maxlength=33554432, tlength=0, base=4,
> prebuf=0, minreq=1 maxrewind=0****
>
> D  memblockq.c: memblockq sanitized: maxlength=33554432, tlength=33554432,
> base=4, prebuf=0, minreq=4 maxrewind=0****
>
> I  source-output.c: Created output 2 "Echo-Cancel Source Stream" on
> alsa_output.platform-pmic_audio.19.intelmadihfheadset.monitor with sample
> spec s16le 2ch 44100Hz and channel map front-left,front-right****
>
> I  source-output.c:     media.name = "Echo-Cancel Source Stream"****
>
> I  source-output.c:     media.role = "filter"****
>
> E  module-echo-cancel.c: new source output <Echo-Cancel Source Stream> on
> source <alsa_output.platform-pmic_audio.19.intelmadihfheadset.monitor>****
>
> ** **
>
> Thanks****
>
> Amanda****
>
> _______________________________________________
> pulseaudio-discuss mailing list
> pulseaudio-discuss at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>
>
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