网站备案中心,wordpress 下载插件xydown,学网站建设好不好,台州企业网站搭建电话Android adb shell dumpsys audio 信息查看分析详解
一、前言
Android 如果要分析当前设备的声音通道相关日志#xff0c; 仅仅看AudioService的日志是看不到啥日志的#xff0c;但是看整个audio关键字的日志又太多太乱了#xff0c; 所以可以看一下系统提供的一个调试指令…Android adb shell dumpsys audio 信息查看分析详解
一、前言
Android 如果要分析当前设备的声音通道相关日志 仅仅看AudioService的日志是看不到啥日志的但是看整个audio关键字的日志又太多太乱了 所以可以看一下系统提供的一个调试指令dumpsys audio 返回的信息进行定位分析 里面主要包含了AudioService启动时间当前设备的音频流指向音频流的声音大小音频外设的连接情况音频播放记录音频外设连接断开记录等等信息。
不同的Android 系统使用 dumpsys audio 命令返回的日志信息可能会有差异 因为打印返回的信息就是AudioService.java里面打印显示的 本文的示例讲解是以mtk方案的Android14日志信息进行讲解。 网上基本没有对dumpsys audio 日志信息进行分析的有兴趣的可以收藏查看。
二、分析
1、简单示例和主要内容
本示例日志是设备连接蓝牙耳机后的dumpsys audio情况日志信息
# dumpsys audio
[18:57:20]Events log: audio services lifecycle
[18:57:20]11-22 18:54:07:681 AudioService() //(1)AudioService 启动时间大概可以推测出开机时间[18:57:20]MediaFocusControl dump time: 6:57:22 PM //(2)执行dumpsys audio的时间//(3)dumpsys audio最重要的内容设备支持声音流情况
[18:57:20]Stream volumes (device: index)
[18:57:20]- STREAM_VOICE_CALL (aliased to: STREAM_MUSIC):
。。。
[18:57:20]- STREAM_SYSTEM (aliased to: STREAM_MUSIC):
。。。
[18:57:20]- STREAM_RING (aliased to: STREAM_MUSIC):
。。
//(4)基本是音频播放的情况上面其他声音通道都是注释了以这个为标准
[18:57:20]- STREAM_MUSIC:
[18:57:20] Muted: false
[18:57:20] Muted Internally: false
[18:57:20] Min: 0 //声音范围
[18:57:20] Max: 15
[18:57:20] streamVolume:7 //当前声音大小
[18:57:20] Current: 2 (speaker): 7, 80 (bt_a2dp): 7, 400 (hdmi): 7, 40000000 (default): 7
[18:57:20] Devices: bt_a2dp(80) //当前声音通道蓝牙
[18:57:20] Volume Group: music
[18:57:20]
[18:57:20]- STREAM_ALARM (aliased to: STREAM_MUSIC):
[18:57:20] Muted: false
[18:57:20] Muted Internally: false
[18:57:20] Min: 1
[18:57:20] Max: 7
[18:57:20] streamVolume:4
[18:57:20] Current: 2 (speaker): 4, 80 (bt_a2dp): 4, 400 (hdmi): 4, 40000000 (default): 4
[18:57:20] Devices: speaker(2), bt_a2dp(80)
[18:57:20] Volume Group: alarm//其他声音通道比较少实用比如铃声通知等情况
[18:57:20]- STREAM_NOTIFICATION (aliased to: STREAM_MUSIC):
[18:57:20]- STREAM_BLUETOOTH_SCO:
[18:57:20]- STREAM_SYSTEM_ENFORCED (aliased to: STREAM_MUSIC):
[18:57:20]- STREAM_DTMF (aliased to: STREAM_MUSIC):
[18:57:20]- STREAM_TTS (aliased to: STREAM_MUSIC):
[18:57:20]- STREAM_ACCESSIBILITY (aliased to: STREAM_MUSIC):
[18:57:20]- STREAM_ASSISTANT (aliased to: STREAM_MUSIC):
。。。//Volume Groups 不知道是干啥的类型也是挺多的。
[18:57:20]Volume Groups (device: index)
[18:57:20]- VOLUME GROUP voice_call:
[18:57:20] Muted: false
[18:57:20] Min: 1
[18:57:20] Max: 7
[18:57:20] Current: 2 (speaker): 4, 80 (bt_a2dp): 7, 40000000 (default): 4
[18:57:20] Devices: bt_a2dp
[18:57:20] Streams: STREAM_VOICE_CALL [18:57:20]- VOLUME GROUP system:
[18:57:20] Muted: false
[18:57:20] Min: 0
[18:57:20] Max: 100
[18:57:20] Current: 2 (speaker): 47, 80 (bt_a2dp): 7, 40000000 (default): 47
[18:57:20] Devices: bt_a2dp
[18:57:20] Streams: STREAM_SYSTEM [18:57:20]- VOLUME GROUP ring:
[18:57:20]- VOLUME GROUP music:
[18:57:20]- VOLUME GROUP alarm:
[18:57:20]- VOLUME GROUP alarm:
[18:57:20]- VOLUME GROUP bluetooth_sco:
[18:57:20]- VOLUME GROUP enforced_audible:
[18:57:20]- VOLUME GROUP dtmf:
[18:57:20]- VOLUME GROUP accessibility:
[18:57:20]- VOLUME GROUP assistant:
[18:57:20]- VOLUME GROUP AUDIO_STREAM_REROUTING:
[18:57:20]- VOLUME GROUP AUDIO_STREAM_PATCH:VOLUME GROUP类型的 Streams属性值都是指向上面的Stream volumes类型的。[18:57:20]Audio routes:
[18:57:20] mMainType0x0
//(5)当前连接蓝牙的设备名称如果未连接蓝牙为null
[18:57:20] mBluetoothNameXiaodu Portable Speaker //(6)音频播放情况日志
[19:00:32]Events log: playback activity as reported through PlayerBase
//开机铃声
[19:00:32]11-22 18:54:09:789 new player piid:71 uid/pid:1000/745 type:android.media.SoundPool attr:AudioAttributes: usageUSAGE_ASSISTANCE_SONIFICATION contentCONTENT_TYPE_SONIFICATION flags0x800 tags bundlenull session:0
[19:00:33]11-22 18:54:10:837 new player piid:79 uid/pid:1000/1069 type:android.media.SoundPool attr:AudioAttributes: usageUSAGE_MEDIA contentCONTENT_TYPE_UNKNOWN flags0x800 tags bundlenull session:0。。。//音频文件播放停止播放停止操作的日志
[19:00:33]11-22 18:58:37:956 player piid:103 event:started
[19:00:33]11-22 18:58:38:076 player piid:103 format update:FormatInfo{isSpatializedfalse, channelMask0x3, sampleRate44100}
[19:00:33]11-22 18:58:38:175 player piid:103 event:device updated deviceId:5
[19:00:33]11-22 18:58:38:190 player piid:103 event:device updated deviceId:5
[19:00:33]11-22 18:58:42:920 player piid:103 event:paused
[19:00:33]11-22 19:00:24:155 player piid:103 event:started
[19:00:33]11-22 19:00:24:169 player piid:103 format update:FormatInfo{isSpatializedfalse, channelMask0x3, sampleRate44100}
[19:00:33]11-22 19:00:24:204 player piid:103 event:device updated deviceId:5
[19:00:33]11-22 19:00:29:492 player piid:103 event:paused//7当前连接的设备这里是连接蓝牙耳机
[18:57:21] Connected devices:
[18:57:21] [DeviceInfo: type:0x80 (bt_a2dp) name:Xiaodu Portable Speaker addr:48:F3:F3:ED:78:AD codec: 1f000000 sensorUuid: 00000000-0000-0000-4254-48f3f3ed78ad disabled modes: {}]
[18:57:21]//8如果是连接的usb有线耳机另外一份日志拼过来的
[15:01:34] Connected devices:
[15:01:34] [DeviceInfo: type:0x4000000 (usb_headset) name:USB-Audio - USB Speaker Phone addr:card4;device0 codec: 0 sensorUuid: null disabled modes: {}]//9连接蓝牙耳机、有线耳机等外设音箱的日志
[18:57:21]Events log: wired/A2DP/hearing aid device connection
。。。
[18:57:21]11-22 18:57:04:640 BT profile service: connecting HEARING_AID profile
[18:57:21]11-22 18:57:04:666 BT profile service: connecting A2DP profile
[18:57:21]11-22 18:57:09:875 msg: onBluetoothActiveDeviceChange state2 addr48:F3:F3:ED:78:AD prof2 supprNoisytrue srcAudioService
[18:57:21]11-22 18:57:09:885 BT connected: addr48:F3:F3:ED:78:AD profile2 state2 codecAUDIO_FORMAT_SBC
[18:57:21]11-22 18:57:10:074 A2DP device addr48:F3:F3:ED:78:AD now available
//上面可以看到蓝牙连接的时间记录//10声音通道占用的日志
[18:57:21]Events log: force use (logged before setForceUse() is executed)
[18:57:21]11-22 18:54:07:774 setForceUse(FOR_DOCK, FORCE_DIGITAL_DOCK) due to readDockAudioSettings
。。。
[18:57:21]11-22 18:54:08:521 setForceUse(FOR_VIBRATE_RINGING, FORCE_NONE) due to muteRingerModeStreams() from u/pid:1000/745
。。。
//从最后一行日志看最后是设置为蓝牙通道的
[18:57:21]11-22 18:57:09:897 setForceUse(FOR_MEDIA, FORCE_NONE) due to setBluetoothA2dpOn(true) from u/pid:1000/745 src:onSetBtActiveDevice//11声音变化和通道情况
[18:57:21]Events log: volume changes (logged when command received by AudioService)
[18:57:21]11-22 18:57:09:885 VolumeStreamState.muteInternally(stream:STREAM_MUSIC, muted)
[18:57:21]11-22 18:57:10:053 setDeviceVolumeBehavior: dev:bt_a2dp addr:48:F3:F3:ED:78:AD behavior:DEVICE_VOLUME_BEHAVIOR_VARIABLE pack:com.android.bluetooth
[18:57:21]11-22 18:57:10:156 avrcpSupportsAbsoluteVolume addr48:F3:F3:ED:78:AD supportfalse
[18:57:21]11-22 18:57:10:323 VolumeStreamState.muteInternally(stream:STREAM_MUSIC, unmuted)
//从上面日志看是蓝牙声音通道STREAM_MUSIC 流//12AudioSystemAdapter 不清楚是啥日志
[18:57:21]AudioSystemAdapter:
[18:57:21] last cache clear time: 11-22 18:57:10:110
[18:57:21] mDevicesForAttrCache:
[18:57:21] AudioAttributes: usageUSAGE_ASSISTANCE_SONIFICATION contentCONTENT_TYPE_UNKNOWN flags0x800 tags bundlenull forVolume: true stream: STREAM_SYSTEM(1)
[18:57:21] AudioDeviceAttributes: role:output type:bt_a2dp addr:48:F3:F3:ED:78:AD name: profiles:[] descriptors:[]
[18:57:21] AudioAttributes: usageUSAGE_ASSISTANCE_ACCESSIBILITY contentCONTENT_TYPE_UNKNOWN flags0x800 tags bundlenull forVolume: true stream: STREAM_ACCESSIBILITY(10)
[18:57:21] AudioDeviceAttributes: role:output type:bt_a2dp addr:48:F3:F3:ED:78:AD name: profiles:[] descriptors:[]
[18:57:21] AudioAttributes: usageUSAGE_UNKNOWN contentCONTENT_TYPE_UNKNOWN flags0x801 tags bundlenull forVolume: true stream: STREAM_SYSTEM(1)
[18:57:21] AudioDeviceAttributes: role:output type:speaker addr: name: profiles:[] descriptors:[]
[18:57:21] AudioDeviceAttributes: role:output type:bt_a2dp addr:48:F3:F3:ED:78:AD name: profiles:[] descriptors:[]
。。。百度查询到AudioSystemAdapter可能会包含如下功能
设备检测检查设备是否支持特定音频特性如蓝牙、耳机插孔等。
音频路径管理动态选择音频流的最佳路径如扬声器、耳机或蓝牙设备。
音效处理应用特定的音效效果如均衡器设置或环绕声模式。
但是从上面日志看不出这些信息可能信息比较隐蔽。
从上面的示例的主要日志信息可以看到dumpsys主要包含当前音频流和外设的信息。
2、dumpsys audio日志的主要格式内容
# dumpsys audio //(1)执行命令
[18:57:20]Events log: audio services lifecycle//(2)AudioService 启动时间大概可以推测出开机时间
[18:57:20]11-22 18:54:07:681 AudioService() //(3)dumpsys audio最重要的内容设备支持声音流情况正常看STREAM_MUSIC
[18:57:20]Stream volumes (device: index)
[18:57:20]- STREAM_MUSIC:
[18:57:20] Muted: false
[18:57:20] Muted Internally: false
[18:57:20] Min: 0 //声音范围
[18:57:20] Max: 15
[18:57:20] streamVolume:7 //当前声音大小
[18:57:20] Current: 2 (speaker): 7, 80 (bt_a2dp): 7, 400 (hdmi): 7, 40000000 (default): 7
[18:57:20] Devices: bt_a2dp(80) //当前声音通道蓝牙
[18:57:20] Volume Group: music
[18:57:20]//(4)音频播放情况日志
[19:00:32]Events log: playback activity as reported through//(5)音频外设连接情况
[18:57:21] Connected devices://6声音通道占用的日志
[18:57:21]Events log: force use (logged before setForceUse() is executed)//7音频外设连接断开日志
[18:57:21]Events log: wired/A2DP/hearing aid device connection//8声音变化和通道情况
[18:57:21]Events log: volume changes (logged when command received by AudioService)//9AudioSystemAdapter 音频管理信息这里只是根据一个实际的示例日志进行的讲解 上面的讲解不一定完全正确和全面仅供参考吧。
三、其他
1、dumpsys audio小结
dumpsys audio 主要能看到
当前设备音频流的指向情况Stream volumes (device: index)
当前系统音频外设连接情况Connected devices
声音通道占用情况记录Events log: force use
音频外设连接断开日志Events log: wired/A2DP/hearing aid device connection
dumpsys audio 最主要就是上面这几个声音相关信息。 更多的要看具体情况的日志了。
2、dumpsys audio 的源码
dumpsys audio 返回的打印信息其实是Java代码上打印的具体源码如下
framework/base/services/core/java/com/android/server/audio/AudioService.java
Overrideprotected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {if (!DumpUtils.checkDumpPermission(mContext, TAG, pw)) return;sLifecycleLogger.dump(pw);if (mAudioHandler ! null) {pw.println(\nMessage handler (watch for unhandled messages):);mAudioHandler.dump(new PrintWriterPrinter(pw), );} else {pw.println(\nMessage handler is null);}...pw.println(\nAudio routes:);pw.print( mMainType0x); pw.println(Integer.toHexString(mDeviceBroker.getCurAudioRoutes().mainType));pw.print( mBluetoothName); pw.println(mDeviceBroker.getCurAudioRoutes().bluetoothName);...pw.println(\n);pw.println(\nSpatial audio:);pw.println(mHasSpatializerEffect: mHasSpatializerEffect (effect present));pw.println(isSpatializerEnabled: isSpatializerEnabled() (routing dependent));mSpatializerHelper.dump(pw);sSpatialLogger.dump(pw);mAudioSystem.dump(pw);}
可以看到 dumpsys audio 命令返回的数据都是在 AudioService.java 里面返回打印的 Audio相关数据很多有兴趣的可以自己分析研究看看 如果想要自定义添加一下额外的打印可以在源码里面添加。
3、使用谷歌文件管理器 GoogleFile 播放音频文件日志
logct | grep -E AudioService|AudioTrack//打开文件管理器后首次播放
11-23 10:22:26.542 798 1614 I MediaSessionStack: addSession to bottom of stack | record: com.google.android.apps.nbu.files/AudioService (userId0)
11-23 10:22:26.938 798 1614 I AudioService.FadeOutManager: unfadeOutUid() uid:10074
11-23 10:22:27.148 798 937 I MediaSessionStack: onPlaybackStateChanged - Pushing session to top | record: com.google.android.apps.nbu.files/AudioService (userId0)
11-23 10:22:27.635 798 1457 I ActivityManager: Background started FGS: Allowed [callingPackage: com.google.android.apps.nbu.files; callingUid: 10074; uidState: TOP ; uidBFSL: [BFSL]; intent: Intent { cmpcom.google.android.apps.nbu.files/.mediaconsumption.audio.service.AudioService (has extras) }; code:PROC_STATE_TOP; tempAllowListReason:null; targetSdkVersion:34; callerTargetSdkVersion:34; startForegroundCount:0; bindFromPackage:null: isBindService:true]
11-23 10:22:27.666 798 798 D MediaSessionService: Media button session is changed to com.google.android.apps.nbu.files/AudioService (userId0)//停止后再次点击播放
11-23 10:22:58.294 7108 7259 D AudioTrack: getTimestamp_l(16): device stall time corrected using current time 2328289907108
11-23 10:22:58.339 798 1460 I MediaSessionStack: onPlaybackStateChanged - Pushing session to top | record: com.google.android.apps.nbu.files/AudioService (userId0)
11-23 10:22:58.344 7108 7259 D AudioTrack: getTimestamp_l(16): stale timestamp time corrected, currentTimeNanos: 2318205649000 limitNs: 2328189081941 mStartNs: 2328287081941
11-23 10:22:58.344 7108 7259 W AudioTrack: getTimestamp_l(16): retrograde timestamp time corrected, 2328189081941 2328329633858能看到一点日志比如AudioTrack播放时间但是没有太多日志比如用什么设备播放、播放音量等等信息。 所以dumpsys audio 还是可以看到当时比较有用的一些日志的。
4、Android 的声音通道类型
其中streamType定义如下
STREAM_ALARM闹钟
STREAM_DTMF双音多频,拨号键的声音
STREAM_MUSIC音乐
STREAM_NOTIFICATION通知
STREAM_RING铃声
STREAM_SYSTEM系统
STREAM_VOICE_CALL通话Android大概支持上面的声音通道类型主要使用的是外放的 STREAM_MUSIC。
5、Android–耳机插拔检测(framework篇)
上层到底层的一顿讲解
https://blog.csdn.net/qq_42364999/article/details/143256027
