i.MX Processors中的主题 Re: AudioFlinger issue

AudioFlinger issue

prasannakulkarni — Wed, 05 Feb 2014 11:31:15 GMT

Hi,

We have made a device using imx6solo and wm8958 codec. everything working fine but,during voice call we are facing some issues, like whenever we want to switch between Earpiece to LoudSpeaker/Headset there is a delay of 8-9 seconds to switch to appropriate mode. and in logcat we are getting like this

W/AudioFlinger( 2098): write blocked for 9997 msecs, 3 delayed writes, thread 0x159f878

we are suspecting because of above AudioFlinger, creating a delay, if anybody knows about it kindly help us in solving this issue.

Re: AudioFlinger issue

weidong_sun — Tue, 25 Feb 2014 08:46:52 GMT

Hello,Prasanna,

Even I can not be sure exact position of the issue, but I can give you some advice to debug it. The following files are related to monitor headset in android4.2 .

(1)sound card driver.

In the driver, interrupt should be used to response headset plug in or out, and it's state is reported to application level, like path "sys/class/switch/../state" , you can add degug information in driver to test response time and observe it on console.

(2)android audio HAL (tinyalsa.c : ~/myandroid/hardware/imx/alsa/)

It is used to connect ALSA lib and Audio Service of android application. you can also add debug information in it.

(3)Headset Observer ( WiredAccessoryManager.java---~/myandroid/frameworks/base/services/java/com/android/server/)

This is java source code, it is used to start headset monitorning and handling events.

Please try to trace source code and find what caused the issue !

Regards,

Weidong

Re: AudioFlinger issue

prasannakulkarni — Fri, 14 Mar 2014 05:48:11 GMT

Hi Weidong Sun,

Thanks for your reply.. All the events like headset insertion/removal is happening fine only.. it works fine during media play(Music) the problem is only during voice call.. we are using alsa_imx.cpp in HAL as it is having support for AIF1 and AIF2 (2 ports on wm8958 card). beginning we thought it is a routing delay in HAL. but When we added debug msgs in alsa_imx.cpp we found that there is delay in entering this file (alsa_imx.cpp) itself. so is it a Audioflinger problem?

Re: AudioFlinger issue

YixingKong — Tue, 01 Apr 2014 06:40:15 GMT

Prasanna

I am going to branch your question to an internal group and have an engineer to look into it.

Thanks,

Yixing

Re: AudioFlinger issue

gfine — Fri, 04 Apr 2014 15:50:10 GMT

Hi Prasanna,

What is at process 2098? You can find out by using 'adb shell ps | grep 2098' at a command line. Whatever is at that process PID is doing the blocking.

Cheers,

Glen

Re: AudioFlinger issue

prasannakulkarni — Wed, 09 Apr 2014 13:37:08 GMT

Hi Glen Fine,

Here is the log when i make a Voice call and shift it to Speaker mode

D/CallController( 2310): placeCall()... intent = Intent { act=android.intent.action.CALL dat=tel:xxxxxxxxxx (has extras) }

D/OtaUtils( 2310): isOtaspCallIntent(Intent { act=android.intent.action.CALL dat=tel:xxxxxxxxxx (has extras) })...

D/OpenGLRenderer( 2418): Flushing caches (mode 0)

D/AudioHardwareInterface( 2072): setMode(IN_CALL)

W/iMXALSA ( 2072): s_close-- android::status_t android_audio_legacy::s_close(android_audio_legacy::alsa_handle_t*)

D/iMXALSA ( 2072): android::status_t android_audio_legacy::s_open(android_audio_legacy::alsa_handle_t*, uint32_t, int) open called for devices 00000001 in mode 2...

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) **** List of PLAYBACK Hardware Devices ****

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) card 0: wm8958audio [wm8958-audio], device 0: HiFi wm8994-aif1-0 []

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) device have=HiFi wm8994-aif1-0

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) card 0: wm8958audio [wm8958-audio], device 1: Voice wm8994-aif2-1 []

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) device have=Voice wm8994-aif2-1

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) selected device =1

W/iMXALSA ( 2072): Don't enable MMAP access for PCM

W/iMXALSA ( 2072): Set sample rate to 8000 HZ

W/iMXALSA ( 2072): Buffer size: 4096

W/iMXALSA ( 2072): Latency: 512000

I/iMXALSA ( 2072): android::status_t android_audio_legacy::s_open(android_audio_legacy::alsa_handle_t*, uint32_t, int) Initialized ALSA PLAYBACK device hw:0,1

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) **** List of PLAYBACK Hardware Devices ****

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) card 0: wm8958audio [wm8958-audio], device 0: HiFi wm8994-aif1-0 []

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) device have=HiFi wm8994-aif1-0

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) card 0: wm8958audio [wm8958-audio], device 1: Voice wm8994-aif2-1 []

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) device have=Voice wm8994-aif2-1

D/iMXALSA ( 2072): const char* android_audio_legacy::deviceName(android_audio_legacy::alsa_handle_t*, uint32_t, int, int) selected device =1

D/iMXALSA ( 2072): void android_audio_legacy::setDefaultControls(uint32_t, int, const char*) setDefaultControls set card: hw:00

D/iMXALSA ( 2072): mode == AudioSystem::MODE_IN_CALL

D/iMXALSA ( 2072): *********Inside Earpiece*************

I/AudioService( 2161): AudioFocus requestAudioFocus() from AudioFocus_For_Phone_Ring_And_Calls

I/ActivityManager( 2161): START {act=android.intent.action.MAIN flg=0x10840000 cmp=com.android.phone/.InCallScreen} from pid 2310