Setup HDMI 5.1 Surround Sound

[Florian E]

Hey,

i'm trying to setup 5.1 PCM sound profile.

In Ubuntu i can switch to "Digital Surround 5.1 (HDMI 2) Output" and my device is streaming 5.1 PCM Multichannel just fine.

Any Idea how to manage this in Android x86?

[youling 257]

alsa_amixer -c0 contents or -c1

which "HDMI/DP,pcm=xxx Jack" is on ?

for example，

alsa_amixer -c1 set 'IEC958',0 on

alsa_amixer -c1 set 'IEC958',1 on

alsa_amixer -c1 set 'IEC958',2 on

alsa_amixer -c1 set 'IEC958',3 on

setprop hal.audio.out pcmC1D7p

killall audioserver

在 2018年3月27日星期二 UTC+8下午5:25:43，Florian E写道：

[Florian E]

alsa_amixer -c0 contents output is:

 

1|x86_64:/ # alsa_amixer -c0 contents

numid=37,iface=CARD,name='HDMI/DP,pcm=10 Jack'

  ; type=BOOLEAN,access=r-------,values=1

  : values=off

numid=13,iface=CARD,name='HDMI/DP,pcm=3 Jack'

  ; type=BOOLEAN,access=r-------,values=1

  : values=off

numid=19,iface=CARD,name='HDMI/DP,pcm=7 Jack'

  ; type=BOOLEAN,access=r-------,values=1

  : values=on

numid=25,iface=CARD,name='HDMI/DP,pcm=8 Jack'

  ; type=BOOLEAN,access=r-------,values=1

  : values=off

numid=31,iface=CARD,name='HDMI/DP,pcm=9 Jack'

  ; type=BOOLEAN,access=r-------,values=1

  : values=off

numid=10,iface=CARD,name='Headphone Jack'

  ; type=BOOLEAN,access=r-------,values=1

  : values=off

numid=9,iface=CARD,name='Mic Jack'

  ; type=BOOLEAN,access=r-------,values=1

  : values=off

numid=2,iface=MIXER,name='Master Playback Switch'

  ; type=BOOLEAN,access=rw------,values=2

  : values=on,on

numid=1,iface=MIXER,name='Master Playback Volume'

  ; type=INTEGER,access=rw---R--,values=2,min=0,max=87,step=0

  : values=87,87

  | dBscale-min=-65.25dB,step=0.75dB,mute=0

numid=8,iface=MIXER,name='Mic Boost Volume'

  ; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0

  : values=1,1

  | dBscale-min=0.00dB,step=10.00dB,mute=0

numid=5,iface=MIXER,name='Mic Playback Switch'

  ; type=BOOLEAN,access=rw------,values=2

  : values=off,off

numid=4,iface=MIXER,name='Mic Playback Volume'

  ; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0

  : values=0,0

  | dBscale-min=-34.50dB,step=1.50dB,mute=0

numid=7,iface=MIXER,name='Capture Switch'

  ; type=BOOLEAN,access=rw------,values=2

  : values=on,on

numid=6,iface=MIXER,name='Capture Volume'

  ; type=INTEGER,access=rw---R--,values=2,min=0,max=63,step=0

  : values=51,51

  | dBscale-min=-17.25dB,step=0.75dB,mute=0

numid=3,iface=MIXER,name='Loopback Mixing'

  ; type=ENUMERATED,access=rw------,values=1,items=2

  ; Item #0 'Disabled'

  ; Item #1 'Enabled'

  : values=0

numid=14,iface=MIXER,name='IEC958 Playback Con Mask'

  ; type=IEC958,access=r-------,values=1

  : values=[AES0=0x0f AES1=0xff AES2=0x00 AES3=0x00]

numid=20,iface=MIXER,name='IEC958 Playback Con Mask',index=1

  ; type=IEC958,access=r-------,values=1

  : values=[AES0=0x0f AES1=0xff AES2=0x00 AES3=0x00]

numid=26,iface=MIXER,name='IEC958 Playback Con Mask',index=2

  ; type=IEC958,access=r-------,values=1

  : values=[AES0=0x0f AES1=0xff AES2=0x00 AES3=0x00]

numid=32,iface=MIXER,name='IEC958 Playback Con Mask',index=3

  ; type=IEC958,access=r-------,values=1

  : values=[AES0=0x0f AES1=0xff AES2=0x00 AES3=0x00]

numid=38,iface=MIXER,name='IEC958 Playback Con Mask',index=4

  ; type=IEC958,access=r-------,values=1

  : values=[AES0=0x0f AES1=0xff AES2=0x00 AES3=0x00]

numid=15,iface=MIXER,name='IEC958 Playback Pro Mask'

  ; type=IEC958,access=r-------,values=1

  : values=[AES0=0x0f AES1=0x00 AES2=0x00 AES3=0x00]

numid=21,iface=MIXER,name='IEC958 Playback Pro Mask',index=1

  ; type=IEC958,access=r-------,values=1

  : values=[AES0=0x0f AES1=0x00 AES2=0x00 AES3=0x00]

numid=27,iface=MIXER,name='IEC958 Playback Pro Mask',index=2

  ; type=IEC958,access=r-------,values=1

  : values=[AES0=0x0f AES1=0x00 AES2=0x00 AES3=0x00]

numid=33,iface=MIXER,name='IEC958 Playback Pro Mask',index=3

  ; type=IEC958,access=r-------,values=1

  : values=[AES0=0x0f AES1=0x00 AES2=0x00 AES3=0x00]

numid=39,iface=MIXER,name='IEC958 Playback Pro Mask',index=4

  ; type=IEC958,access=r-------,values=1

  : values=[AES0=0x0f AES1=0x00 AES2=0x00 AES3=0x00]

numid=16,iface=MIXER,name='IEC958 Playback Default'

  ; type=IEC958,access=rw------,values=1

  : values=[AES0=0x04 AES1=0x00 AES2=0x00 AES3=0x00]

numid=22,iface=MIXER,name='IEC958 Playback Default',index=1

  ; type=IEC958,access=rw------,values=1

  : values=[AES0=0x04 AES1=0x00 AES2=0x00 AES3=0x00]

numid=28,iface=MIXER,name='IEC958 Playback Default',index=2

  ; type=IEC958,access=rw------,values=1

  : values=[AES0=0x04 AES1=0x00 AES2=0x00 AES3=0x00]

numid=34,iface=MIXER,name='IEC958 Playback Default',index=3

  ; type=IEC958,access=rw------,values=1

  : values=[AES0=0x04 AES1=0x00 AES2=0x00 AES3=0x00]

numid=40,iface=MIXER,name='IEC958 Playback Default',index=4

  ; type=IEC958,access=rw------,values=1

  : values=[AES0=0x04 AES1=0x00 AES2=0x00 AES3=0x00]

numid=17,iface=MIXER,name='IEC958 Playback Switch'

  ; type=BOOLEAN,access=rw------,values=1

  : values=on

numid=23,iface=MIXER,name='IEC958 Playback Switch',index=1

  ; type=BOOLEAN,access=rw------,values=1

  : values=on

numid=29,iface=MIXER,name='IEC958 Playback Switch',index=2

  ; type=BOOLEAN,access=rw------,values=1

  : values=on

numid=35,iface=MIXER,name='IEC958 Playback Switch',index=3

  ; type=BOOLEAN,access=rw------,values=1

  : values=on

numid=41,iface=MIXER,name='IEC958 Playback Switch',index=4

  ; type=BOOLEAN,access=rw------,values=1

  : values=on

numid=12,iface=PCM,name='Capture Channel Map'

  ; type=INTEGER,access=r----R--,values=2,min=0,max=36,step=0

  : values=0,0

  |     | TLV size error (257, 8, 0)!

numid=11,iface=PCM,name='Playback Channel Map'

  ; type=INTEGER,access=r----R--,values=2,min=0,max=36,step=0

  : values=0,0

  |     | TLV size error (257, 8, 0)!

numid=18,iface=PCM,name='ELD',device=3

  ; type=BYTES,access=r--v----,values=0

  : values=

numid=43,iface=PCM,name='Playback Channel Map',device=3

  ; type=INTEGER,access=rw---R--,values=8,min=0,max=36,step=0

  : values=0,0,0,0,0,0,0,0

  |     | TLV size error (258, 8, 0)!

numid=24,iface=PCM,name='ELD',device=7

  ; type=BYTES,access=r--v----,values=52

  : values=0x10,0x00,0x0c,0x00,0x68,0x86,0x00,0x4f,0x00,0x00,0x00,0x00,0x00,0x00

,0x00,0x00,0x3d,0xcb,0x42,0x0b,0x54,0x58,0x2d,0x4e,0x52,0x35,0x30,0x39,0x09,0x7f

,0x07,0x0f,0x7f,0x07,0x17,0x07,0x50,0x3f,0x06,0xc0,0x4d,0x02,0x00,0x57,0x06,0x00

,0x5f,0x7e,0x01,0x67,0x54,0x00

numid=44,iface=PCM,name='Playback Channel Map',device=7

  ; type=INTEGER,access=rw---R--,values=8,min=0,max=36,step=0

  : values=0,0,0,0,0,0,0,0

  |     | TLV size error (258, 8, 0)!

numid=30,iface=PCM,name='ELD',device=8

  ; type=BYTES,access=r--v----,values=0

  : values=

numid=45,iface=PCM,name='Playback Channel Map',device=8

  ; type=INTEGER,access=rw---R--,values=8,min=0,max=36,step=0

  : values=0,0,0,0,0,0,0,0

  |     | TLV size error (258, 8, 0)!

numid=36,iface=PCM,name='ELD',device=9

  ; type=BYTES,access=r--v----,values=0

  : values=

numid=46,iface=PCM,name='Playback Channel Map',device=9

  ; type=INTEGER,access=rw---R--,values=8,min=0,max=36,step=0

  : values=0,0,0,0,0,0,0,0

  |     | TLV size error (258, 8, 0)!

numid=42,iface=PCM,name='ELD',device=10

  ; type=BYTES,access=r--v----,values=0

  : values=

numid=47,iface=PCM,name='Playback Channel Map',device=10

  ; type=INTEGER,access=rw---R--,values=8,min=0,max=36,step=0

  : values=0,0,0,0,0,0,0,0

  |     | TLV size error (258, 8, 0)!

If i use alsa_aplay -D plughw:CARD=PCH,DEV=7 test.wav it plays on 5.1 multichannel, but the speaker order is not correct. (Center is Subwoofer, FL is Center ...)

[youling 257]

setprop hal.audio.out pcmC0D7p

killall audioserver

as i know，you can't use Android adjust HDMI volume.

在 2018年3月27日星期二 UTC+8下午6:54:54，Florian E写道：

[Florian E]

This works but i still only have stereo sound, no 5.1

if i play the wav file with aplay 5.1 works

if i play it with mediacodec / vlc / ijkplayer the file only plays in stereo.

any further ideas?

[youling 257]

when i hear ac3，i thought "MX Player AC3 & DTS Custom Codec"

[Florian E]

For testing i also use those *.wav files from the frauenhofer iis:

https://www2.iis.fraunhofer.de/AAC/multichannel.html

with alsa_aplay everything is ok - with mediaplayer its only stereo 

[youling 257]

try Kodi，setting audio number channel

在 2018年3月27日星期二 UTC+8下午8:48:20，Florian E写道：

[Florian E]

thanks for the hint - I did,

even with enabled stereo upmixing and setting it fixed to 5.1 - still stereo output.

[Florian E]

Android says it's possible to set the flag AUDIO_OUTPUT_FLAG_DIRECT in audio_policy.conf to bypass audioflinger

https://source.android.com/devices/audio/implement-policy

but that's not working, seems the property to set the correct output device is also bypassed now

Get this in logcat:

W APM_AudioPolicyManager: getOutput() could not find output for stream 3, samplingRate 0,format 0, channels 3, flags 0

[youling 257]

edit /system/etc/audio_policy.conf

audio_hw_modules {

  primary {

    outputs {

      primary {

        sampling_rates 48000

        channel_masks AUDIO_CHANNEL_OUT_5POINT1

then killall audioserver

在 2018年3月28日星期三 UTC+8下午2:41:52，Florian E写道：

[Florian E]

Did that,

no changes.

i also recompiled AudioMixer.cpp with verbose log it always says:

AudioMixer: Track 0 needs downmix

somewhere there has to be another setting saying the system is not multichannel capable

[Florian E]

Seems after setting the new output device and killall audioserver the playback mixerthread is not updated

logcat says:

3637  3637 V AudioFlinger: mSampleRate=48000, mChannelMask=0x3, mChannelCount=2, mFormat=1, mFrameSize=4, mFrameCount=512, mNormalFrameCount=1024

So the playback thread keeps setup on 2 channels. this line comes after every server restart

i tried setting the mChannelMask to AUDIO_CHANNEL_OUT_5POINT1 in AudioFlinger::openOutput - but output keeps on 2 channels.

any dev here who can help me figure this out?

[Florian E]

I tried a few things now but no success so far.

for me it all looks like a configuration is missing somewhere.

it seems there is a different audio_hw.c in 

/hardware/intel/audio_media/hdmi/tinyaudio_hw.c

but i couln't find out if this is even used or not.

does anyone got a hint for me where to continue?

[Chih-Wei Huang]

2018-03-29 21:00 GMT+08:00 'Florian E' via Android-x86
<andro...@googlegroups.com>:

> I tried a few things now but no success so far.
> for me it all looks like a configuration is missing somewhere.
>
> it seems there is a different audio_hw.c in
>
> /hardware/intel/audio_media/hdmi/tinyaudio_hw.c

This is only used for intel-hdmi-lpe device.
Basically you should check hardware/libaudio/.

> but i couln't find out if this is even used or not.
> does anyone got a hint for me where to continue?

I'm afraid you asked a topic that
nobody has ever tried in android-x86.
Welcome to debug and fix it.



--
Chih-Wei
Android-x86 project
http://www.android-x86.org

[Florian E]

thanks for your answer,

i'll try to set it up modifing audio_hw.c (out_write mainly i think)

do you know whats the DOBLY_ENABLE flag is used for? i saw it a few times in the av folder.

is there a fast way to rebuild hardware/libaudio? it doesn't seem to change anything if i use mma here and replace lib, lib64 an bin from out folders on my device.

only rebuilding all seem to use the new code so far and this takes 4:30h 

[Chih-Wei Huang]

2018-03-30 21:15 GMT+08:00 'Florian E' via Android-x86
<andro...@googlegroups.com>:

> thanks for your answer,
>
> i'll try to set it up modifing audio_hw.c (out_write mainly i think)
> do you know whats the DOBLY_ENABLE flag is used for? i saw it a few times in
> the av folder.

No idea.

> is there a fast way to rebuild hardware/libaudio? it doesn't seem to change
> anything if i use mma here and replace lib, lib64 an bin from out folders on
> my device.

You can just build the module by specifying its name:

m -j8 audio.primary.x86

> only rebuilding all seem to use the new code so far and this takes 4:30h

Should not take so long in the later incremental build.

[Florian E]

In the end it was quite easy to set up.

Just change

out_get_channels

and

pcm_config_out

in audio_hw.c to your needs.

i just needed to find out that lib/hw/ is used instead of lib64/hw even it's a 64bit build.

now it's working