i am currently able to change the permission of both the /dev/snd
(softlink) and the /dev/ files.
both are having the following permission:
User:root and Group: audio.
But the permission denied problem is still there.
is there any way to test the asound.conf file which i have written.??
What modifications we have to do in the "hardware/alsa_sound" folder
for our particular hardware??
as per suggestion i have tried the eclair branch alsa-lib also,but no
improvement.
Does android support OSS framework?? I saw the below link.. but its
not working currently.
https://review.source.android.com/#change,9114
Thanks and Regards,
Pramod
On Jun 10, 7:39 pm, XingChao Wang <wxc...@gmail.com> wrote:
> 2010/6/10 pramod <pramodkum...@gmail.com>
>
> > hi xiangchao,
>
> > Thanks for the direction. But i have few doubt.
>
> > I am currently using the donut branch code. if i use the latest alsa-
> > lib (eclair or even the master), will it work with the donut branch??
>
> > i think so.
> > I have written a small program to change the "group" permission of the
> > device node soft links in "/dev/snd" folder using the "lchown". But
> > still not able to get it working.
>
> > This is the error which i am currently getting.
>
> you can change permissions in init.rc.
>
>
>
> > E/AudioHardwareALSA( 1591): Unable to attach mixer to device
> > AndroidOut: Permission denied
> > E/AudioHardwareALSA( 1591): Unable to attach mixer to device default:
> > No such file or directory
> > E/AudioHardwareALSA( 1591): Unable to attach mixer to device
> > AndroidIn: Permission denied
> > E/AudioHardwareALSA( 1591): Unable to attach mixer to device default:
> > No such file or directory
>
> > Thanks,
> > Pramod
>
> > On Jun 9, 8:08 pm, XingChao Wang <wxc...@gmail.com> wrote:
> > > hi,
>
> > > i also met such issue,use latest alsa-lib and make sure /dev/snd/* right
> > > permissions.
>
> > > thanks
> > > --wang xingchao
>
> > > 2010/6/9 pramod <pramodkum...@gmail.com>
>
> > > > After changing the asound.conf slightly i am getting a permission
> > > > denied error now.
>
> > > > Can anyone please tell me how to change the "group" field of the
> > > > softlink in android.
> > > > if i use chown to change group to "audio" then its changing the
> > > > permission of the source file not the softlink.
> > > > The chown -h option is missing in andriod, or else it could have been
> > > > used.
>
> > > > Thanks,
> > > > Pramod.
>
> > > > On Jun 7, 2:44 pm, pramod <pramodkum...@gmail.com> wrote:
> > > > > Thanks for the reply.
> > > > > The contents of my /dev/snd are given below.
>
> > > > > lrwxrwxrwx root root 1970-01-01 00:00 timer -> /dev/
> > > > > timer
> > > > > lrwxrwxrwx root root 1970-01-01 00:00 controlC0 -> /
> > > > > dev/controlC0
> > > > > lrwxrwxrwx root root 1970-01-01 00:00 pcmC0D0p -> /
> > > > > dev/pcmC0D0p
> > > > > lrwxrwxrwx root root 1970-01-01 00:00 pcmC0D0c -> /
> > > > > dev/pcmC0D0c
>
> > > > > I am creating soft link from the /dev/ directory.
> > > > > are these device nodes not enough??
>
> > > > > Pramod
>
> > > > > On Jun 7, 2:28 pm, Pavan Savoy <pavan.sa...@gmail.com> wrote:
>
> > > > > > ls /dev/snd/ should show up both pcmCxDxP/C sort of pcm devices and
> > > > also
> > > > > > Controlx sort of control devices, for you to do an amixer upon it.
>
> > > > > > alsa_aplay -L here I suppose shows only pcm devices you have ?
>
> > > > > > On Mon, Jun 7, 2010 at 2:52 PM, pramod <pramodkum...@gmail.com>
> > wrote:
> > > > > > > Hi All,
>
> > > > > > > I am currently writing the asound.conf file for my hardware Sigma
> > > > > > > 8654.
> > > > > > > The alsa utils are working fine and detecting the card.
>
> > > > > > > # alsa_aplay -L
> > > > > > > default:CARD=EM8XXX
> > > > > > > EM8xxx card, EM8xxx
> > > > > > > Default Audio Device
> > > > > > > null
> > > > > > > Discard all samples (playback) or generate zero samples
> > (capture)
> > > > > > > #
> > > > > > > # alsa_aplay -l
> > > > > > > **** List of PLAYBACK Hardware Devices ****
> > > > > > > card 0: EM8XXX [EM8xxx card], device 0: em8xxx [EM8xxx]
> > > > > > > Subdevices: 2/2
> > > > > > > Subdevice #0: subdevice #0
> > > > > > > Subdevice #1: subdevice #1
>
> > > > > > > Using the alsa_amixer i am able to get the below output.
>
> > > > > > > # alsa_amixer contents
> > > > > > > numid=1,iface=MIXER,name='Hardware Master Playback Volume'
> > > > > > > ; type=INTEGER,access=rw------,values=2,min=0,max=73,step=0
> > > > > > > : values=49,49
> > > > > > > numid=3,iface=MIXER,name='IEC958 Playback Con Mask'
> > > > > > > ; type=IEC958,access=r-------,values=1
> > > > > > > : values=[AES0=0xff AES1=0xff AES2=0xff AES3=0xff]
> > > > > > > numid=4,iface=MIXER,name='IEC958 Playback Switch'
> > > > > > > ; type=BOOLEAN,access=rw------,values=1
> > > > > > > : values=on
> > > > > > > numid=5,iface=MIXER,name='Decoder Weight'
> > > > > > > ; type=INTEGER,access=rw------,values=2,min=0,max=73,step=0
> > > > > > > : values=0,0
> > > > > > > numid=2,iface=PCM,name='IEC958 Playback Default'
> > > > > > > ; type=IEC958,access=rw------,values=1
> > > > > > > : values=[AES0=0x00 AES1=0x00 AES2=0x00 AES3=0x00]
>
> > > > > > > Looking at the above values i have written below configuration.
>
> > > > > > > pcm.AndroidPlayback {
> > > > > > > type hooks
> > > > > > > slave.pcm {
> > > > > > > type hw
> > > > > > > card 0
> > > > > > > device 0
> > > > > > > }
> > > > > > > hooks.0 {
> > > > > > > type ctl_elems
> > > > > > > hook_args [
> > > > > > > {
> > > > > > > name 'Hardware Master Playback Volume'
> > > > > > > value.0 49
> > > > > > > value.1 49
> > > > > > > }
> > > > > > > {
> > > > > > > name 'IEC958 Playback Default'
> > > > > > > value [ 0x00 0x00 0x00 0x00 ]
> > > > > > > }
> > > > > > > {
> > > > > > > name 'IEC958 Playback Con Mask'
> > > > > > > value [ 0xff 0xff 0xff 0xff ]
> > > > > > > }
> > > > > > > {
> > > > > > > name 'IEC958 Playback Switch'
> > > > > > > value true
> > > > > > > }
> > > > > > > {
> > > > > > > name 'Decoder Weight'
> > > > > > > value.0 0
> > > > > > > value.1 0
> > > > > > > }
>
> > > > > > > ]
> > > > > > > }
> > > > > > > }
>
> > > > > > > But i am getting still the below errors while booting android.
>
> > > > > > > E/ALSALib ( 1332): external/alsa-lib/src/control/control.c:909:
> > > > > > > (snd_ctl_open_noupdate) Invalid CTL AndroidOut
> > > > > > > E/AudioHardwareALSA( 1332): Unable to attach mixer to device
> > > > > > > AndroidOut: No such file or directory
> > > > > > > E/AudioHardwareALSA( 1332): Unable to attach mixer to device
> > default:
> > > > > > > No such file or directory
> > > > > > > E/ALSALib ( 1332): external/alsa-lib/src/control/control.c:909:
> > > > > > > (snd_ctl_open_noupdate) Invalid CTL AndroidIn
> > > > > > > E/AudioHardwareALSA( 1332): Unable to attach mixer to device
> > > > > > > AndroidIn: No such file or directory
> > > > > > > E/AudioHardwareALSA( 1332): Unable to attach mixer to device
> > default:
> > > > > > > No such file or directory
>
> > > > > > > Please provide some directions for solving the above issue.
> > > > > > > Thanks in advance.
> > > > > > > Pramod
>
> > > > > > > --
> > > > > > > unsubscribe:
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>
> > > > > > > website:http://groups.google.com/group/android-porting
>
> > > > > > --
> > > > > > --Pavan Savoy
>
> > > > --
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>
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>
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