modules kernel snd-aloop implementation in android audio HAL.

[Din Assegaf]

Hi,
how can we include snd-aloop modules which create new device in /proc/asound/ to be used in Android HAL audio, it seem we dont have enough documentation how to make this works. 

it is working in alsa enviroment, tinyplay and any other detect it. but not HAL audio environment.

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[Kiran mardi]

Hi,

it is working in alsa enviroment, tinyplay and any other detect it. but not HAL audio environment.

>>>>>>> what do you mean by HAL audio Environment?

               you can open a PCM node for the sound card in HAL code.

On Wed, Oct 28, 2020 at 12:31 AM Din Assegaf <[hidden email]> wrote:

Hi,
how can we include snd-aloop modules which create new device in /proc/asound/ to be used in Android HAL audio, it seem we dont have enough documentation how to make this works. 

it is working in alsa enviroment, tinyplay and any other detect it. but not HAL audio environment.

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[Din Assegaf]

On Thursday, 29 October 2020 at 00:54:52 UTC+7 [hidden email] wrote:

Hi,

it is working in alsa enviroment, tinyplay and any other detect it. but not HAL audio environment.

>>>>>>> what do you mean by HAL audio Environment?

               you can open a PCM node for the sound card in HAL code.

When I tried to turn off the primary modules driver in kernel sound card eg sdm660sndcard, and left only snd-aloop driver loaded in kernel 
cat /proc/asound/cards

0 [Loopback ] Loopback - Loopback
                         Loopback 1

the application apk or  any app didnot found any output, do error, or popup the did not found device error, 

>  you can open a PCM node for the sound card in HAL code.
how I do that ? change the PCM node to primay HAL, so override its location to eg. 

X00TD:/ # ls -l /proc/asound/card0/                                            

total 0

-r--r--r--  1 root root  0 2020-10-29 14:03 cable#0

-r--r--r--  1 root root  0 2020-10-29 14:03 cable#1

-r--r--r--  1 root root  0 2020-10-29 14:03 id

dr-xr-xr-x 10 root root  0 2020-10-29 14:03 pcm0c

dr-xr-xr-x 10 root root  0 2020-10-29 14:03 pcm0p

dr-xr-xr-x 10 root root  0 2020-10-29 14:03 pcm1c

dr-xr-xr-x 10 root root  0 2020-10-29 14:03 pcm1p

-r--r--r--  1 root root 16 2020-10-29 14:03 state

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[Kiran mardi]

  >  you can open a PCM node for the sound card in HAL code.
how I do that ? change the PCM node to primay HAL, so override its location to eg.  

>>>> Yes, or you can also handle them as a new HAL to be loaded from audiopolicymanager.  

On Thu, Oct 29, 2020 at 9:28 PM Din Assegaf <[hidden email]> wrote:

On Thursday, 29 October 2020 at 00:54:52 UTC+7 [hidden email] wrote:

Hi,

it is working in alsa enviroment, tinyplay and any other detect it. but not HAL audio environment.

>>>>>>> what do you mean by HAL audio Environment?

               you can open a PCM node for the sound card in HAL code.

When I tried to turn off the primary modules driver in kernel sound card eg sdm660sndcard, and left only snd-aloop driver loaded in kernel 
cat /proc/asound/cards

0 [Loopback ] Loopback - Loopback
                         Loopback 1

the application apk or  any app didnot found any output, do error, or popup the did not found device error, 

>  you can open a PCM node for the sound card in HAL code.
how I do that ? change the PCM node to primay HAL, so override its location to eg. 

X00TD:/ # ls -l /proc/asound/card0/                                            

total 0

-r--r--r--  1 root root  0 2020-10-29 14:03 cable#0

-r--r--r--  1 root root  0 2020-10-29 14:03 cable#1

-r--r--r--  1 root root  0 2020-10-29 14:03 id

dr-xr-xr-x 10 root root  0 2020-10-29 14:03 pcm0c

dr-xr-xr-x 10 root root  0 2020-10-29 14:03 pcm0p

dr-xr-xr-x 10 root root  0 2020-10-29 14:03 pcm1c

dr-xr-xr-x 10 root root  0 2020-10-29 14:03 pcm1p

-r--r--r--  1 root root 16 2020-10-29 14:03 state

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regards,
Kiran Mardi

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