Hi Glenn, thanks for reply.
i run the Audio Buffer Size app from store and run this app. The result is;
sample rate 44.1kHz and buffer size :144
My system is build on Android 4.2.2 version, BaseBand version : I515.10
V.FK01 / I515.10 V.FK02 ,
Kernel version 3.0.31 g9f818de ***@vpbs1.mtv.corp.google.com #1 and
build numberJDQ39
i run this command adb shell media.audio_flinger and output is :
Clients:
pid: 378
pid: 567
Global session refs:
session pid count
6 567 1
1337 378 1
1338 378 1
1339 378 1
1901 378 1
2004 378 1
Hardware status: 0
Standby Time mSec: 3000
Output thread 0x41bb2370 internals
last write occurred (msecs): 179294
total writes: 385626
delayed writes: 0
blocked in write: 0
suspend count: 0
mix buffer : 0x41bba608
Fast track availMask=0x40
io handle: 2
TID: 398
standby: 1
Sample rate: 44100
HAL frame count: 144
Normal frame count: 864
Channel Count: 2
Channel Mask: 0x00000003
Format: 1
Frame size: 4
Pending setParameters commands:
Index Command
Pending config events:
AudioMixer tracks: 0000005f
FastMixer command=COLD_IDLE writeSequence=4629472 framesWritten=333321984
numTracks=1 writeErrors=0 underruns=151604 overruns=27308
sampleRate=44100 frameCount=144 measuredWarmup=76.3 ms,
warmupCycles=2
mixPeriod=3.27 ms
Simple moving statistics over last 3.1 seconds:
wall clock time in ms per mix cycle:
mean=3.26 min=0.09 max=6.65 stddev=1.10
raw CPU load in us per mix cycle:
mean=194 min=0 max=397 stddev=55
Fast tracks: kMaxFastTracks=8 activeMask=0x1
Index Active Full Partial Empty Recent Ready
0 yes 531 0 134 full 1440
1 no 0 0 0 full 0
2 no 507 0 250 empty 0
3 no 134 2 779 empty 0
4 no 283 0 805 empty 0
5 no 536 0 142 empty 0
6 no 478 0 337 empty 0
7 no 665 1 782 empty 0
State queue observer: stateChanges=6449
State queue mutator: pushDirty=6449 pushAck=3224 blockedSequence=748
Output thread 0x41bb2370 stream volumes in dB:
0:-18, 1:-24, 2:-21, 3:-37, 4:-14, 5:-6, 6:0, 7:-24, 8:-18, 9:-37
Output thread 0x41bb2370 tracks
Name Client Type Fmt Chn mask Session mFrCnt fCount S M F SRate L dB
R dB Server User Main buf Aux Buf Flags Underruns
F 2 378 1 1 0x00000001 1339 144 3456 S 0 1 44100 -Inf
-Inf 0x00000000 0x00000000 0x41bba608 0x00000000 0x83 0
F 5 378 1 1 0x00000001 1337 144 3456 S 0 1 44100 -Inf
-Inf 0x00000000 0x00000000 0x41bba608 0x00000000 0x83 0
F 3 378 1 1 0x00000001 1901 4 3456 S 0 1 44100 -Inf
-Inf 0x00000000 0x00000000 0x41bba608 0x00000000 0x83 0
F 4 378 1 1 0x00000001 1338 144 3456 S 0 1 44100 -Inf
-Inf 0x00000000 0x00000000 0x41bba608 0x00000000 0x83 0
F 1 567 0 1 0x00000001 6 0 288 I 0 0 44100 -10
-10 0x00000000 0x00000000 0x41bba608 0x00000000 0x8b 0
F 7 378 1 1 0x00000001 2004 144 3456 S 0 1 44100 -Inf
-Inf 0x00000000 0x00000000 0x41bba608 0x00000000 0x83 0
Output thread 0x41bb2370 active tracks
Name Client Type Fmt Chn mask Session mFrCnt fCount S M F SRate L dB
R dB Server User Main buf Aux Buf Flags Underruns
Normal mixer raw underrun counters: partial=0 empty=134
- 0 Effect Chains:
Output thread 0x41bc6cf8 internals
last write occurred (msecs): 171439719
total writes: 0
delayed writes: 0
blocked in write: 0
suspend count: 0
mix buffer : 0x41bcef90
Fast track availMask=0xfe
io handle: 3
TID: 399
standby: 1
Sample rate: 44100
HAL frame count: 976
Normal frame count: 976
Channel Count: 2
Channel Mask: 0x00000003
Format: 1
Frame size: 4
Pending setParameters commands:
Index Command
Pending config events:
AudioMixer tracks: 00000000
FastMixer not initialized
State queue observer: stateChanges=0
State queue mutator: pushDirty=0 pushAck=0 blockedSequence=0
Output thread 0x41bc6cf8 stream volumes in dB:
0:-10, 1:-22, 2:0, 3:-22, 4:-4.5, 5:-26, 6:0, 7:-22, 8:-22, 9:-22
Output thread 0x41bc6cf8 tracks
Name Client Type Fmt Chn mask Session mFrCnt fCount S M F SRate L dB
R dB Server User Main buf Aux Buf Flags Underruns
Output thread 0x41bc6cf8 active tracks
Name Client Type Fmt Chn mask Session mFrCnt fCount S M F SRate L dB
R dB Server User Main buf Aux Buf Flags Underruns
Normal mixer raw underrun counters: partial=0 empty=0
Post by Glenn KastenSorry for my delay in replying. Which software build are you on?
(I think you can get this from Settings / About phone)
Can you please include the output of shell command
dumpsys media.audio_flinger
(this command now includes statistics that may help to
understand the noise, but I'm not sure if your build includes the
statistics)
Post by umut caliskanHi,
i am developing a recording and playing audio android sample application.
I have a samsung galaxy nexus.
I m using opensl and use a circular buffer implementation from Victor
Lazzarini's sample. (http://audioprograming.wordpress.com/)
I saw the buffer samples of my phone is 144 and it has 44100 sampling rate.
When i set the buffer sample equal to 144 and sample rate 44100, Output
sound crackle and distorting sound.
when i was buffer sample equals to 1200 +, i heard normal sound but
latency occurs..
Do you have any idea? What is the optimum sample rate and buffer samples.
Or any sample other real time audio processing like recording and playing?
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