执行蓝牙 HFP 音频网关功能 - Qualcomm Dragonwing Documentation

前提条件

连接远程设备

要连接远程设备，请从 bluetoothctl 菜单运行以下命令：

connect <bt_address>

参数 <bt_address> 是远程设备的蓝牙地址。示例要连接 <bt_address> 为 20:19:D8:36:90:40 的已配对远程设备，请运行以下命令：

connect 20:19:D8:36:90:40

示例输出

[Test]# connect 20:19:D8:36:90:40
Attempting to connect to 20:19:D8:36:90:40
[CHG] Device 20:19:D8:36:90:40 Connected: yes
[CHG] Device 20:19:D8:36:90:40 UUIDs: 00001108-0000-1000-8000-00805f9b34fb
[CHG] Device 20:19:D8:36:90:40 UUIDs: 0000110b-0000-1000-8000-00805f9b34fb
[CHG] Device 20:19:D8:36:90:40 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb
[CHG] Device 20:19:D8:36:90:40 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb
[CHG] Device 20:19:D8:36:90:40 UUIDs: 0000111e-0000-1000-8000-00805f9b34fb
[CHG] Device 20:19:D8:36:90:40 ServicesResolved: yes
[CHG] Device 20:19:D8:36:90:40 Bonded: yes
[CHG] Device 20:19:D8:36:90:40 Paired: yes
[NEW] Endpoint /org/bluez/hci0/dev_20_19_D8_36_90_40/sep1
[NEW] Transport /org/bluez/hci0/dev_20_19_D8_36_90_40/sep1/fd1
Connection successful
[CHG] Transport /org/bluez/hci0/dev_20_19_D8_36_90_40/sep1/fdl State: active
[CHG] Transport /org/bluez/hci0/dev_20_19_D8_36_90_40/sep1/fd1 Volume: 0x0068 (104)
[CHG] Transport /org/bluez/hci0/dev_20_19_D8_36_90_40/sep1/fd1 State: idle

验证音频网关功能

要验证音频网关功能，请执行以下操作：

默认情况下 pactl 工具不可用。请在您的设备上启用并构建该工具。

运行以下命令列出所有卡，验证 BlueZ 卡的可用配置文件，并找到其活动配置文件：

pactl list cards

示例输出

# pactl list cards
Card #65
   Name: bluez_card.20_19_D8_36_90_40
   Driver: module-bluez5-device.c
   Owner Module: n/a
   Properties:
      device.api = "bluez5"
      device.bus = "bluetooth"
      media.class = "Audio/Device"
      device.name = "bluez_card.20_19_D8_36_90_40"
      device.description = " MyHeadset"
      device.alias = " MyHeadset"
      device.form_factor = "headset"
      device.string = "20:19:D8:36:90:40 "
      api.bluez5.icon = "audio-headset"
      api.bluez5.path = "/org/bluez/hci0/dev_20_19_D8_36_90_40"
      api.bluez5.address = "20:19:D8:36:90:40"
      api.bluez5.device = ""
      api.bluez5.class = "0x240404"
      api.bluez5.connection = "connected"
      device.icon_name = "audio-headset-bluetooth"
      bluez5.profile = "off"
      spa.object.id = "5"
      factory.id = "15"
      client.id = "33"
      object.id = "36"
      object.serial = "65"
   Profiles:
      off: Off (sinks: 0, sources: 0, priority: 0, available: yes)
      a2dp-sink: High Fidelity Playback (A2DP Sink, codec SBC) (sinks: 1, sources: 0, priority: 18, available: yes)
      a2dp-sink-sbc_xq: High Fidelity Playback (A2DP Sink, codec SBC-XQ) (sinks: 1, sources: 0, priority: 17, available: yes)
      headset-head-unit-cvsd: Headset Head Unit (HSP/HFP, codec CVSD) (sinks: 1, sources: 1, priority: 2, available: yes)
      headset-head-unit: Headset Head Unit (HSP/HFP, codec mSBC) (sinks: 1, sources: 1, priority: 3, available: yes)
   Active Profile: a2dp-sink
   Ports:
      headset-input: Handsfree (type: Headset, priority: 0, latency offset: 0 usec, available)
         Properties:
            port.type = "headset"
         Part of profile(s): headset-head-unit-cvsd, headset-head-unit
      headset-output: Headset (type: Headset, priority: 0, latency offset: 0 usec, available)
         Properties:
            port.type = "headset"
         Part of profile(s): a2dp-sink, a2dp-sink-sbc_xq
      headset-hf-output: Handsfree (type: Headset, priority: 0, latency offset: 0 usec, available)
         Properties:
            port.type = "headset"
         Part of profile(s): headset-head-unit-cvsd, headset-head-unit

如果活动配置文件是 a2dp-sink（Active Profile: a2dp-sink），请运行以下命令将活动配置文件切换到 headset-head-unit：
pactl set-card-profile bluez_card.20_19_D8_36_90_40 headset-head-unit
此设置可确保在连接多个配置文件时通过 SCO 传输音频流。

运行以下命令验证 BlueZ 卡的活动配置文件已设置为 headset-head-unit：

pactl list cards

示例输出

# pactl list cards
Card #65
   Name: bluez_card.20_19_D8_36_90_40
   Driver: module-bluez5-device.c
   Owner Module: n/a
   Properties:
      device.api = "bluez5"
      device.bus = "bluetooth"
      media.class = "Audio/Device"
      device.name = "bluez_card.20_19_D8_36_90_40"
      device.description = " MyHeadset"
      device.alias = " MyHeadset"
      device.form_factor = "headset"
      device.string = "20:19:D8:36:90:40 "
      api.bluez5.icon = "audio-headset"
      api.bluez5.path = "/org/bluez/hci0/dev_20_19_D8_36_90_40"
      api.bluez5.address = "20:19:D8:36:90:40"
      api.bluez5.device = ""
      api.bluez5.class = "0x240404"
      api.bluez5.connection = "connected"
      device.icon_name = "audio-headset-bluetooth"
      bluez5.profile = "off"
      spa.object.id = "5"
      factory.id = "15"
      client.id = "33"
      object.id = "36"
      object.serial = "65"
   Profiles:
      off: Off (sinks: 0, sources: 0, priority: 0, available: yes)
      a2dp-sink: High Fidelity Playback (A2DP Sink, codec SBC) (sinks: 1, sources: 0, priority: 18, available: yes)
      a2dp-sink-sbc_xq: High Fidelity Playback (A2DP Sink, codec SBC-XQ) (sinks: 1, sources: 0, priority: 17, available: yes)
      headset-head-unit-cvsd: Headset Head Unit (HSP/HFP, codec CVSD) (sinks: 1, sources: 1, priority: 2, available: yes)
      headset-head-unit: Headset Head Unit (HSP/HFP, codec mSBC) (sinks: 1, sources: 1, priority: 3, available: yes)
   Active Profile: headset-head-unit

按如下方式创建虚拟 SCO： a. 在 DUT 上运行 SSH。有关说明，请参见使用 SSH 登录。 b. 运行以下命令播放 WAV 文件：

paplay <file.wav> -v

示例要播放 AG_playback.wav 文件，请运行以下命令：

paplay AG_playback.wav -v

示例输出

sh-5.1# paplay AG_playback.wav -v
Opening a playback stream with sample specification 's16le 2ch 44100Hz' and channel map 'front-left,front-right'.
Connection established.
Stream successfully created.
Buffer metrics: maxlength=4194304, tlength=352800, prebuf=349276, minreq=3528
Using sample spec 's16le 2ch 44100Hz', channel map 'front-left,front-right'.
Connected to device bluez_output.20:19:D8:36:90:40 (index: 68, suspended: no).
Stream started. 
Time: 2.003 sec; Latency: 2042009 usec.

运行以下命令接收来自远程设备的麦克风数据：

parec -v --rate=<rate> --format=<format> --channels=<channel_number> --file-format=<file_format audio_filepath> --device=<device_name>

参数

选项	参数	描述	示例
`--rate`	`<rate>`	播放音频文件的特定采样率。	`16000`
`--format`	`<format>`	播放音频文件的特定采样格式。	`s16le`
`--channels`	`<channel_number>`	播放音频文件的特定通道数。	`1`
`--file-format`	`<file_format audio_filepath>`	从目录播放音频文件的文件格式。	`wav /data/rec1.wav`
`--device`	`<device_name>`	用于播放音频文件的 source 或 sink 的设备名称。	`bluez_input.20:19:D8:36:90:40`

要从 source 列表中识别设备名称，请在 SSH 中运行以下命令：

pactl list sources short

示例输出

sh-5.1# pactl list sources short
    alsa_output.platform-sound.HiFi__Speaker__sink.monitor  PipeWire        s16le 2ch 48000Hz       SUSPENDED
    alsa_input.platform-sound.HiFi__Mic1__source    PipeWire        s16le 2ch 48000Hz       SUSPENDED
    bluez_input.20:19:D8:36:90:40   PipeWire        float32le 1ch 48000Hz   SUSPENDED
    bluez_output.20:19:D8:36:90:40.monitor  PipeWire        float32le 2ch 48000Hz   SUSPENDED

示例要按表中列出的示例值接收来自远程设备的麦克风数据，请运行以下命令：

parec -v --rate=16000 --format=s16le --channels=1 --file-format=wav /data/rec1.wav --device=bluez_input.20:19:D8:36:90:40

示例输出

sh-5.1# parec -v --rate=16000 --format=s16le --channels=1 --file-format=wav /data/rec1.wav --device=bluez_input.20:19:D8:36:90:40
Opening a recording stream with sample specification 's16le 1ch 16000Hz' and channel map 'mono'.
Connection established.
Stream successfully created.
Buffer metrics: maxlength=4194304, fragsize=64000
Using sample spec 's16le 1ch 16000Hz', channel map 'mono'.
Connected to device bluez_input.20:19:D8:36:90:40 (index: 65, suspended: no).

播放录制的麦克风数据并验证音频是否清晰。

断开远程设备

要断开远程设备，请从 bluetoothctl 菜单运行以下命令：

disconnect <bt_address>

参数 <bt_address> 是远程设备的蓝牙地址。示例要断开 <bt_address> 为 20:19:D8:36:90:40 的已配对远程设备，请运行以下命令：

disconnect 20:19:D8:36:90:40

示例输出

[MyHeadset]# disconnect 20:19:D8:36:90:40
Attempting to disconnect from 20:19:D8:36:90:40
[DEL] Transport /org/bluez/hci0/dev_20_19_D8_36_90_40/sep1/fd2
[DEL] Endpoint /org/bluez/hci0/dev_20_19_D8_36_90_40/sep1
[CHG] Device 20:19:D8:36:90:40 ServicesResolved: no
Successful disconnected
[CHG] Device 20:19:D8:36:90:40 Connected: no

​前提条件

​连接远程设备

​验证音频网关功能

​断开远程设备

前提条件

连接远程设备

验证音频网关功能

断开远程设备