AudioFlinger DirectThread
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Dean
Feb 7, 2011, 11:15:55 PM2/7/11
to android-porting
When is the AudioFlinger DirectThread ever invoked?
DuplicatingThread appears to be invoked whenever Bluetooth and Speaker
are active simultaneously, but am unable to have the system invoke the
DirectThread.
DuplicatingThread appears to be invoked whenever Bluetooth and Speaker
are active simultaneously, but am unable to have the system invoke the
DirectThread.
Glenn Kasten
Feb 9, 2011, 11:36:36 AM2/9/11
to android-porting
The direct output thread was originally intended for:
1. audio output HALs that can't do down-sampling for certain stream
types
2. voice processing e.g. echo cancellation
3. non-PCM output in low-power mode
It has been used on at least one platform a while ago, but has not
been used recently that I know of. The concept of the direct output
thread without software mixing has potential, but it may need more
design before it will be generally useful.
1. audio output HALs that can't do down-sampling for certain stream
types
2. voice processing e.g. echo cancellation
3. non-PCM output in low-power mode
It has been used on at least one platform a while ago, but has not
been used recently that I know of. The concept of the direct output
thread without software mixing has potential, but it may need more
design before it will be generally useful.
Rob Jones
Feb 9, 2011, 5:55:38 PM2/9/11
to android-porting
On Feb 10, 3:36 am, Glenn Kasten <gkas...@android.com> wrote:
> The direct output thread was originally intended for:
> 1. audio output HALs that can't do down-sampling for certain stream
> types
> 2. voice processing e.g. echo cancellation
> 3. non-PCM output in low-power mode
> It has been used on at least one platform a while ago, but has not
> been used recently that I know of. The concept of the direct output
> thread without software mixing has potential, but it may need more
> design before it will be generally useful.
>
There seems to be some references in the directthread to effect chain
> The direct output thread was originally intended for:
> 1. audio output HALs that can't do down-sampling for certain stream
> types
> 2. voice processing e.g. echo cancellation
> 3. non-PCM output in low-power mode
> It has been used on at least one platform a while ago, but has not
> been used recently that I know of. The concept of the direct output
> thread without software mixing has potential, but it may need more
> design before it will be generally useful.
>
processing. Presumably this just operates on one-effect per output
rather than effects pre and post mixing?
Cheers,
Rob
Hector Barajas
Feb 28, 2011, 12:58:02 PM2/28/11
to android-porting
Is there any direct thread for Uplink?
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