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1、Android蓝牙AVRCP功能的实现保 III作者:Macro LiuAVRCP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 := trueBT音频操纵的代
2、码externalbluetoothbluezaudiocontrol.c按键的MAPstatic 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
3、 ,(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_mapi.name != NULL; i+) ( uint8_t key_quirks;if (operands。 & 0x7F) != key_mapi.avrcp)continue;DBG(AVRCP: %s %s, key_mapi.name, status);key_quirks = control-k
4、ey_quirkskey_mapi.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_mapi.uinput, 1); send_key(control-uinput, key_mapi.uinput, 0); break; send_key(control-uinput, key_mapi.uinput
5、, 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 12L2CAP(d): cid 0x0042 len 8 psm 04c0c4c000000:3011 0e0048 7c000.H|L. HCI Command: Exit Sniff Mode (0x02|0x0004) plen 20000:00 HCI Event: Max Slots Change (0x1b) plen 30000:0c05 HCI Event: M
6、ode Change (0x14) plen 60000:000c00000000. HCI Event: Command Status(0x0f) plen 40000:0c010408 ACL data: handle 12 flags 0x02 dlen 12L2CAP(d): cid 0x0042 len 8 psm 00000:40110e00487ccc00.H|? HCI Event: Number of Completed Packets (0x13) plen 5000000:010c0002播放/暂停： ACL data: handle 12 flags 0x02 dlen
7、 12L2CAP(d): cid 0x0042 len 8 psm 0 0000:50110e00 ACL00 HCIEvent: Number of Completed Packets 0000:01(0x13) plen 50c000200右键： ACL data: handle 12 flags 0x02 dlen 12L2CAP(d): cid 0x0042 len 8 psm 00000:70110e00487c4600p.H|F. ACLdata: handle 12 flags0x02 dlen 12L2CAP(d): cid 0x0042len 8 psm 00000:8011
8、0e00487cc600H|? HCI Event: Number of Completed Packets (0x13) plen 50000:010c000200 HCI Event: Max Slots Change (0x1b) plen 30000:0c0001 HCI Event: Mode Change (0x14) plen 60000:000c0002c800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): operands。 = 46 对应 PA
9、USE_OPD/ACRVP( 237): key_quirks = 0, pressed = 1 按键按下D/ACRVP (237): control-uinput = fffffffe,send_key = 201 对应MEDIA_PLAY_PAUSED/ACRVP ( 237): handle_panel_passthrough D/ACRVP( 237): operands0 = c6 (= 0x46 I 0x80 表示按键开释了)D/ACRVP( 237): key_quirks = 0, pressed = 0 按键开释D/ACRVP (237): control-uinput =
10、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_OPD/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_passthro
11、ugh D/ACRVP ( 237): operands。 = c4D/ACRVP ( 237): key_quirks = 0, pressed = 0 按键开释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): operands0 = 4b 对应 FORWARD_OPD/ACRVP ( 237): key_quirks = 0, pressed = 1D/ACRVP (237): control-uinput = fffffffe,send_key = 163 对应MEDIANEXTD/ACRVPD/ACRVPD/ACRVPD/ACRVP( 237): handle_panel_passthrough ( 237): operands0 = cb( 237): key_quirks = 0, pressed = 0prev key:D/ACRVP (D/ACRVP
