Android 蓝牙AVRCP功能的实现.docx

1、Android 蓝牙AVRCP功能的实现Android蓝牙AVRCP功能的实现作者:MacroLiuAVRCP的按键定义:sdkemulatorkeymapsAVRCP.klkey200MEDIA_PLAY_PAUSEWAKEkey201MEDIA_PLAY_PAUSEWAKEkey166MEDIA_STOPWAKEkey163MEDIA_NEXTWAKEkey165MEDIA_PREVIOUSWAKEkey168MEDIA_REWINDWAKEkey208MEDIA_FAST_FORWARDWAKEBCM(broadcom)宏定义需要打开:BOARD_HAVE_BLUETOOTH_BCM:=

2、trueBT音频控制的代码externalbluetoothbluezaudiocontrol.c(1)按键的MAPstaticstruct constchar*name; uint8_tavrcp; uint16_tuinput;key_map= PLAY, PLAY_OP, KEY_PLAYCD, STOP, STOP_OP, KEY_STOPCD, PAUSE, PAUSE_OP, KEY_PAUSECD, FORWARD, FORWARD_OP, KEY_NEXTSONG, BACKWARD, BACKWARD_OP, KEY_PREVIOUSSONG, REWIND, REWIND_

3、OP, KEY_REWIND, FASTFORWARD, FAST_FORWARD_OP, KEY_FASTFORWARD, NULL;(2)按键处理staticvoidhandle_panel_passthrough(structcontrol*control, for(i=0;key_mapi.name!=NULL;i+) uint8_tkey_quirks; if(operands0&0x7F)!=key_mapi.avrcp) continue; DBG(AVRCP:%s%s,key_mapi.name,status); key_quirks=control-key_quirkskey

4、_mapi.avrcp; if(key_quirks&QUIRK_NO_RELEASE) if(!pressed) DBG(AVRCP:Ignoringrelease); break; DBG(AVRCP:treatingkeypressaspress+release); send_key(control-uinput,key_mapi.uinput,1); send_key(control-uinput,key_mapi.uinput,0); break; send_key(control-uinput,key_mapi.uinput,pressed); break; HCIDUMP数据分析

5、以Sony耳机DRC-BT15为例#adbshell#hcidumpX左键:ACLdata:handle12flags0x02dlen12L2CAP(d):cid0x0042len8psm00000:30110e00487c4c000.H|L.HCICommand:ExitSniffMode(0x02|0x0004)plen20000:0c00.HCIEvent:MaxSlotsChange(0x1b)plen30000:0c0005.HCIEvent:ModeChange(0x14)plen60000:000c00000000.HCIEvent:CommandStatus(0x0f)plen

6、40000:0c010408.ACLdata:handle12flags0x02dlen12L2CAP(d):cid0x0042len8psm00000:40110e00487ccc00.H|?HCIEvent:NumberofCompletedPackets(0x13)plen50000:010c000200.播放/暂停:ACLdata:handle12flags0x02dlen12L2CAP(d):cid0x0042len8psm00000:50110e00487c4b00P.H|K.ACLdata:handle12flags0x02dlen12L2CAP(d):cid0x0042len8

7、psm00000:60110e00487ccb00.H|?HCIEvent:NumberofCompletedPackets(0x13)plen50000:010c000200.右键:ACLdata:handle12flags0x02dlen12L2CAP(d):cid0x0042len8psm00000:70110e00487c4600p.H|F.ACLdata:handle12flags0x02dlen12L2CAP(d):cid0x0042len8psm00000:80110e00487cc600.H|?HCIEvent:NumberofCompletedPackets(0x13)ple

8、n50000:010c000200.HCIEvent:MaxSlotsChange(0x1b)plen30000:0c0001.HCIEvent:ModeChange(0x14)plen60000:000c0002c800.?然后将control.c的日志打印出来:按一次”“播放/暂停键”:D/ACRVP(237):-handle_panel_passthrough-D/ACRVP(237):operands0=46对应PAUSE_OPD/ACRVP(237):key_quirks=0,pressed=1按键按下D/ACRVP(237):control-uinput=fffffffe,send

9、_key=201对应MEDIA_PLAY_PAUSED/ACRVP(237):-handle_panel_passthrough-D/ACRVP(237):operands0=c6(=0x460x80表示按键释放了)D/ACRVP(237):key_quirks=0,pressed=0按键释放D/ACRVP(237):control-uinput=fffffffe,send_key=201对应MEDIA_PLAY_PAUSE再按一次”“播放/暂停键”:D/ACRVP(237):-handle_panel_passthrough-D/ACRVP(237):operands0=44对应PLAY_O

10、PD/ACRVP(237):key_quirks=0,pressed=1按键按下D/ACRVP(237):control-uinput=fffffffe,send_key=200对应MEDIA_PLAY_PAUSED/ACRVP(237):-handle_panel_passthrough-D/ACRVP(237):operands0=c4D/ACRVP(237):key_quirks=0,pressed=0按键释放D/ACRVP(237):control-uinput=fffffffe,send_key=200对应MEDIA_PLAY_PAUSEnextkey:D/ACRVP(237):-h

11、andle_panel_passthrough-D/ACRVP(237):operands0=4b对应FORWARD_OPD/ACRVP(237):key_quirks=0,pressed=1D/ACRVP(237):control-uinput=fffffffe,send_key=163对应MEDIA_NEXTD/ACRVP(237):-handle_panel_passthrough-D/ACRVP(237):operands0=cbD/ACRVP(237):key_quirks=0,pressed=0D/ACRVP(237):control-uinput=fffffffe,send_ke

12、y=163prevkey:D/ACRVP(237):-handle_panel_passthrough-D/ACRVP(237):operands0=4c对应BACKWARD_OPD/ACRVP(237):key_quirks=0,pressed=1D/ACRVP(237):control-uinput=fffffffe,send_key=165对应D/ACRVP(237):-handle_panel_passthrough-D/ACRVP(237):operands0=ccD/ACRVP(237):key_quirks=0,pressed=0D/ACRVP(237):control-uinp

13、ut=fffffffe,send_key=165MEDIA_PREVIOUS从上面可以看到bluetooth的协议栈blueZ是没有问题的将frameworksbaselibsuiEventHub.cpp的LOG打开，只能看到了control.c的日志，EventHub的getEvent完全不响应观察所有log日志发现，openDevice里也没有装载AVRCP.kl初步判断event有问题event分析：$adbshell#cd/proc/bus/input#catdevicescatdevices#catdevicescatdevicesI:Bus=0019Vendor=0001Produ

14、ct=0001Version=0001参考s3c-keypad.cN:Name=s3c-keypad input_dev-name=DEVICE_NAME;P:Phys=s3c-keypad/input0input_dev-phys=s3c-keypad/input0;S:Sysfs=/devices/virtual/input/input0virtual的?U:Uniq=H:Handlers=event0B:EV=3B:KEY=40004000I:Bus=0019Vendor=0001Product=0001Version=0100参考vpad_buttons.cN:Name=s3c-ein

15、tkeyinput-name=pdev-name,gpio_keys_device_driver.name =s3c-eintkey,P:Phys=gpio-keys/input0input-phys=gpio-keys/input0S:Sysfs=/devices/platform/s3c-eintkey/input/input1为什么这里是platform目录?U:Uniq=H:Handlers=event1B:EV=3B:KEY=100000000I:Bus=0018Vendor=0000Product=0000Version=0000参考amri_ts.cN:Name=amri_tsa

16、mri_ts_driver.name=amri_tsP:Phys=没有定义S:Sysfs=/devices/platform/s3c2440-i2c.0/i2c-0/0-0033/input/input2为什么这里是platform目录?U:Uniq=H:Handlers=event2B:EV=bB:KEY=4000000040000800400010000B:ABS=26500000I:Bus=0000Vendor=0000Product=0000Version=0000N:Name=ecompass_dataP:Phys=S:Sysfs=/devices/virtual/input/inp

17、ut3U:Uniq=H:Handlers=event3B:EV=9B:ABS=307bf从上面可以看到，完全没有AVRCP的event。解决办法:Kernel$makemenuconfigCONFIG_INPUT_UINPUT解决后的状况:$adbshell#cd/proc/bus/input#catdevices显示增加了一个eventI:Bus=0005Vendor=0000Product=0000Version=0000N:Name=AVRCPP:Phys=S:Sysfs=/devices/virtual/input/input4U:Uniq=H:Handlers=event4B:EV=

18、100007B:KEY=1030016800000B:REL=0看openDevice的信息:D/EventHub(84):EventHub:readNotifynfd:87D/EventHub(84):Openingdevice:/dev/input/event4D/EventHub(84):Gettingkeys.D/EventHub(84):Gettingabsolutecontrollers.D/EventHub(84):keylayoutFilename=/system/usr/keylayout/AVRCP.klI/EventHub(84):Newkeyboard:device-i

19、d=0x10003devname=AVRCPpropName=hw.keyboards.65539.devnamekeylayout=/system/usr/keylayout/AVRCP.klI/EventHub(84):Newdevice:path=/dev/input/event4name=AVRCPid=0x10003(of0x4)index=4fd=196classes=0x1D/EventHub(84):Addingdevice/dev/input/event40x361800at4,id=3,classes=0x1D/EventHub(84):Reportingdeviceope

20、ned:id=0x10003,name=/dev/input/event4按键时也可以看到EventHub的信息了:Log如下:D/ACRVP(236):-handle_panel_passthrough-D/ACRVP(236):operands0=46D/ACRVP(236):key_quirks=0,pressed=1D/ACRVP(236):control-uinput=14,send_key=201control.c发出201号键，按键按下了D/EventHub(84):/dev/input/event4got:t0=937,t1=582930,type=1,code=201,v=1

21、表示从event4得到201号键MEDIA_PLAY_PAUSED/EventHub(84):iev.code=201keyCode=85flags=0x00000001err=0D/EventHub(84):/dev/input/event4got:t0=937,t1=600241,type=0,code=0,v=0D/AudioHardware(61):AudioStreamOutALSA:setParameters()routing=0D/ACRVP(236):-handle_panel_passthrough-D/ACRVP(236):operands0=c6D/ACRVP(236):

22、key_quirks=0,pressed=0D/ACRVP(236):control-uinput=14,send_key=c9D/EventHub(84):/dev/input/event4got:t0=937,t1=664391,type=1,code=201,v=0control.c发出201号键，按键释放了D/EventHub(84):iev.code=201keyCode=85flags=0x00000001err=0D/EventHub(84):/dev/input/event4got:t0=937,t1=664406,type=0,code=0,v=0D/A2DP(61):a2d

23、p_stopD/A2DP(61):bluetooth_stopE/BluetoothEventLoop.cpp(84):event_filter:Receivedsignalorg.bluez.AudioSink:Stoppedfrom/org/bluez/236/hci0/dev_00_1D_BA_A5_D8_1CE/BluetoothEventLoop.cpp(84):event_filter:Receivedsignalorg.bluez.AudioSink:PropertyChangedfrom/org/bluez/236/hci0/dev_00_1D_BA_A5_D8_1CE/Blu

24、etoothEventLoop.cpp(84):event_filter:Receivedsignalorg.bluez.AudioSink:PropertyChangedfrom/org/bluez/236/hci0/dev_00_1D_BA_A5_D8_1CV/BluetoothEventRedirector(244):Receivedandroid.bluetooth.a2dp.action.SINK_STATE_CHANGEDD/CachedBluetoothDevice(244):onProfileStateChanged:profileA2DPnewProfileState2D/BluetoothA2dpService(84):A2DPstate:device:00:1D:BA:A5:D8:1CState:4-2D/A2DP(61):ReceivedBT_RESPONSE-BT_STOP_STREAMD/dalvikvm(285):GC_EXPLICITfreed87K,56%free2640K/5895K,external1625K/2137K,paused75msMacroLiu2011-08-01