Android-蓝牙AVRCP功能的实现.docx

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Android 蓝牙AVRCP功能的实现作者:Macro Liu AVRCP的按键定义: key 200 MEDIA_PLAY_PAUSE WAKE key 201 MEDIA_PLAY_PAUSE WAKE key 166 MEDIA_STOP WAKE key 163 MEDIA_NEXT WAKE key 165 MEDIA_PREVIOUS WAKE key 168 MEDIA_REWIND WAKE key 208 MEDIA_FAST_FORWARD WAKE BCM(broadcom)宏定义需要翻开: BOARD_HAVE_BLUETOOTH_BCM := true BT音频控制的代码 (1) 按键的MAP static struct { const char *name; uint8_t avrcp; uint16_t uinput; } 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_OP, KEY_REWIND }, { "FAST FORWARD", FAST_FORWARD_OP, KEY_FASTFORWARD }, { NULL } }; (2) 按键处理 static void handle_panel_passthrough(struct control *control, { … for (i = 0; key_map[i].name != NULL; i++) { uint8_t key_quirks; if ((operands[0] & 0x7F) != key_map[i].avrcp) continue; DBG("AVRCP: %s %s", key_map[i].name, status); key_quirks = control->key_quirks[key_map[i].avrcp]; if (key_quirks & QUIRK_NO_RELEASE) { if (!pressed) { DBG("AVRCP: Ignoring release"); break; } DBG("AVRCP: treating key press as press + release"); send_key(control->uinput, key_map[i].uinput, 1); send_key(control->uinput, key_map[i].uinput, 0); break; } send_key(control->uinput, key_map[i].uinput, pressed); break; } … } HCIDUMP数据分析以Sony耳机DRC-BT15为例 #adb shell #hcidump –X 左键: > ACL data: handle 12 flags 0x02 dlen 12 L2CAP(d): cid 0x0042 len 8 [psm 0] 0000: 30 11 0e 00 48 7c 4c 00 0...H|L. < HCI Command: Exit Sniff Mode (0x02|0x0004) plen 2 0000: 0c 00 .. < ACL data: handle 12 flags 0x00 dlen 12 0000: 08 00 4b 00 32 11 0e 09 48 7c 4c 00 ..K.2...H|L. > HCI Event: Max Slots Change (0x1b) plen 3 0000: 0c 00 05 ... > HCI Event: Mode Change (0x14) plen 6 0000: 00 0c 00 00 00 00 ...... > HCI Event: Command Status (0x0f) plen 4 0000: 0c 01 04 08 .... > ACL data: handle 12 flags 0x02 dlen 12 L2CAP(d): cid 0x0042 len 8 [psm 0] 0000: 40 11 0e 00 48 7c cc 00 @...H|? < ACL data: handle 12 flags 0x00 dlen 12 0000: 08 00 4b 00 42 11 0e 09 48 7c cc 00 ..K.B...H|? > HCI Event: Number of Completed Packets (0x13) plen 5 0000: 01 0c 00 02 00 ..... 播放/暂停: > ACL data: handle 12 flags 0x02 dlen 12 L2CAP(d): cid 0x0042 len 8 [psm 0] 0000: 50 11 0e 00 48 7c 4b 00 P...H|K. < ACL data: handle 12 flags 0x00 dlen 12 0000: 08 00 4b 00 52 11 0e 09 48 7c 4b 00 ..K.R...H|K. > ACL data: handle 12 flags 0x02 dlen 12 L2CAP(d): cid 0x0042 len 8 [psm 0] 0000: 60 11 0e 00 48 7c cb 00 `...H|? < ACL data: handle 12 flags 0x00 dlen 12 0000: 08 00 4b 00 62 11 0e 09 48 7c cb 00 ..K.b...H|? > HCI Event: Number of Completed Packets (0x13) plen 5 0000: 01 0c 00 02 00 ..... 右键: > ACL data: handle 12 flags 0x02 dlen 12 L2CAP(d): cid 0x0042 len 8 [psm 0] 0000: 70 11 0e 00 48 7c 46 00 p...H|F. < ACL data: handle 12 flags 0x00 dlen 12 0000: 08 00 4b 00 72 11 0e 09 48 7c 46 00 ..K.r...H|F. > ACL data: handle 12 flags 0x02 dlen 12 L2CAP(d): cid 0x0042 len 8 [psm 0] 0000: 80 11 0e 00 48 7c c6 00 ....H|? < ACL data: handle 12 flags 0x00 dlen 12 0000: 08 00 4b 00 82 11 0e 09 48 7c c6 00 ..K.....H|? > HCI Event: Number of Completed Packets (0x13) plen 5 0000: 01 0c 00 02 00 ..... > HCI Event: Max Slots Change (0x1b) plen 3 0000: 0c 00 01 ... > HCI Event: Mode Change (0x14) plen 6 0000: 00 0c 00 02 c8 00 ....? 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): operands[0] = 46 对应PAUSE_OP D/ACRVP ( 237): key_quirks = 0, pressed = 1按键按下 D/ACRVP ( 237): control->uinput = fffffffe,send_key = 201对应MEDIA_PLAY_PAUSE D/ACRVP ( 237): --- handle_panel_passthrough ---- D/ACRVP ( 237): operands[0] = c6 (= 0x46 ｜ 0x80 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): operands[0] = 44 对应PLAY_OP D/ACRVP ( 237): key_quirks = 0, pressed = 1 按键按下 D/ACRVP ( 237): control->uinput = fffffffe,send_key = 200 对应MEDIA_PLAY_PAUSE D/ACRVP ( 237): --- handle_panel_passthrough ---- D/ACRVP ( 237): operands[0] = c4 D/ACRVP ( 237): key_quirks = 0, pressed = 0 按键释放 D/ACRVP ( 237): control->uinput = fffffffe,send_key = 200 对应MEDIA_PLAY_PAUSE next key: D/ACRVP ( 237): --- handle_panel_passthrough ---- D/ACRVP ( 237): operands[0] = 4b对应FORWARD_OP D/ACRVP ( 237): key_quirks = 0, pressed = 1 D/ACRVP ( 237): control->uinput = fffffffe,send_key = 163 对应MEDIA_NEXT D/ACRVP ( 237): --- handle_panel_passthrough ---- D/ACRVP ( 237): operands[0] = cb D/ACRVP ( 237): key_quirks = 0, pressed = 0 D/ACRVP ( 237): control->uinput = fffffffe,send_key = 163 prev key: D/ACRVP ( 237): --- handle_panel_passthrough ---- D/ACRVP ( 237): operands[0] = 4c 对应BACKWARD_OP D/ACRVP ( 237): key_quirks = 0, pressed = 1 D/ACRVP ( 237): control->uinput = fffffffe,send_key = 165 对应 D/ACRVP ( 237): --- handle_panel_passthrough ---- D/ACRVP ( 237): operands[0] = cc D/ACRVP ( 237): key_quirks = 0, pressed = 0 D/ACRVP ( 237): control->uinput = fffffffe,send_key = 165 MEDIA_PREVIOUS 从上面可以看到bluetooth的协议栈blueZ是没有问题的将的LOG翻开，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里也没有装载初步判断event有问题 event分析： $ adb shell # cd /proc/bus/input # cat devices cat devices # cat devices cat devices I: Bus=0019 Vendor=0001 Product=0001 Version=0001 参考s3c N: Name="s3c-keypad" input_dev->name = DEVICE_NAME; P: Phys=s3c-keypad/input0 input_dev->phys = "s3c-keypad/input0"; S: Sysfs=/devices/virtual/input/input0 virtual的? U: Uniq= H: Handlers=event0 B: EV=3 B: KEY=4000400 0 I: Bus=0019 Vendor=0001 Product=0001 Version=0100参考 N: Name="s3c-eintkey" input->name = pdev->name, gpio_keys_device_driver.name = "s3c-eintkey", P: Phys=gpio-keys/input0 input->phys = "gpio-keys/input0" S: Sysfs=/devices/platform/s3c-eintkey/input/input1 为什么这里是platform目录? U: Uniq= H: Handlers=event1 B: EV=3 B: KEY=100000 0 0 0 I: Bus=0018 Vendor=0000 Product=0000 Version=0000 参考 N: Name="amri_ts" amri_ts_driver.name = "amri_ts" P: 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=event2 B: EV=b B: KEY=400 0 0 0 0 0 40000800 40 0 0 10000 B: ABS=2650000 0 I: Bus=0000 Vendor=0000 Product=0000 Version=0000 N: Name="ecompass_data" P: Phys= S: Sysfs=/devices/virtual/input/input3 U: Uniq= H: Handlers=event3 B: EV=9 B: ABS=307bf 从上面可以看到，完全没有AVRCP的event。解决方法: Kernel $ make menuconfig CONFIG_INPUT_UINPUT 解决后的状况: $ adb shell # cd /proc/bus/input # cat devices 显示增加了一个event I: Bus=0005 Vendor=0000 Product=0000 Version=0000 N: Name="AVRCP" P: Phys= S: Sysfs=/devices/virtual/input/input4 U: Uniq= H: Handlers=event4 B: EV=100007 B: KEY=10300 168 0 0 0 0 0 B: REL=0 看openDevice的信息: D/EventHub( 84): EventHub::readNotify nfd: 87 D/EventHub( 84): Opening device: /dev/input/event4 D/EventHub( 84): Getting keys... D/EventHub( 84): Getting absolute controllers... D/EventHub( 84): keylayoutFilename = /system/usr/keylayout/AVRCP.kl I/EventHub( 84): New keyboard: device->id=0x10003 devname='AVRCP' propName='hw.keyboards.65539.devname' keylayout='/system/usr/keylayout/AVRCP.kl' I/EventHub( 84): New device: path=/dev/input/event4 name=AVRCP id=0x10003 (of 0x4) index=4 fd=196 classes=0x1 D/EventHub( 84): Adding device /dev/input/event4 0x361800 at 4, id = 3, classes = 0x1 D/EventHub( 84): Reporting device opened: 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): operands[0] = 46 D/ACRVP ( 236): key_quirks = 0, pressed = 1 D/ACRVP ( 236): control->uinput = 14,send_key = 201 ，按键按下了 D/EventHub( 84): /dev/input/event4 got: t0=937, t1=582930, type=1, code=201, v=1 表示从event4得到201号键 MEDIA_PLAY_PAUSE D/EventHub( 84): iev.code=201 keyCode=85 flags=0x00000001 err=0 D/EventHub( 84): /dev/input/event4 got: t0=937, t1=600241, type=0, code=0, v=0 D/AudioHardware( 61): AudioStreamOutALSA::setParameters() routing=0 D/ACRVP ( 236): --- handle_panel_passthrough ---- D/ACRVP ( 236): operands[0] = c6 D/ACRVP ( 236): key_quirks = 0, pressed = 0 D/ACRVP ( 236): control->uinput = 14,send_key = c9 D/EventHub( 84): /dev/input/event4 got: t0=937, t1=664391, type=1, code=201, v=0 control.c发出201号键，按键释放了 D/EventHub( 84): iev.code=201 keyCode=85 flags=0x00000001 err=0 D/EventHub( 84): /dev/input/event4 got: t0=937, t1=664406, type=0, code=0, v=0 D/A2DP ( 61): a2dp_stop D/A2DP ( 61): bluetooth_stop E/BluetoothEventLoop.cpp( 84): event_filter: Received signal org.bluez.AudioSink:Stopped from /org/bluez/236/hci0/dev_00_1D_BA_A5_D8_1C E/BluetoothEventLoop.cpp( 84): event_filter: Received signal org.bluez.AudioSink:PropertyChanged from /org/bluez/236/hci0/dev_00_1D_BA_A5_D8_1C E/BluetoothEventLoop.cpp( 84): event_filter: Received signal org.bluez.AudioSink:PropertyChanged from /org/bluez/236/hci0/dev_00_1D_BA_A5_D8_1C D/CachedBluetoothDevice( 244): onProfileStateChanged: profile A2DP newProfileState 2 D/BluetoothA2dpService( 84): A2DP state : device: 00:1D:BA:A5:D8:1C State:4->2 D/A2DP ( 61): Received BT_RESPONSE - BT_STOP_STREAM D/dalvikvm( 285): GC_EXPLICIT freed 87K, 56% free 2640K/5895K, external 1625K/2137K, paused 75ms Macro Liu 2011-08-01

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