嵌入式linux开发板使用pulseaudio连接蓝牙耳机播放音频文件
2024-05-23 11:31:14
pulseaudio基于a2dp音频架构，其使用流程如下：
首先需要一直bluez5及pulseaudio，此处关于一直pulseaudio详见其他博客。
配置使用流程：
1.开启蓝牙设备
//此处与后续的bluetoothctl命令中的power on相对应,没有开启的话,bluetoothctl会报错.
root@imx6qsabresd:~#rfkill unblock bluetooth
2.启动蓝牙
root@imx6qsabresd:~#hciconfig hci0 up
3.通过bluetoothctl连接蓝牙耳机
//必须先启动bluetoothd，否则bluetoothctl无法工作
root@imx6qsabresd:~#bluetoothd&
root@imx6qsabresd:~#bluetoothctl
[bluetooth]# power on
Changing power on succeeded
[bluetooth]# agent on
Agent registered
[bluetooth]# default-agent
Default agent request successful
[bluetooth]# scan on
Discovery started
[CHG] Controller A4:17:31:C7:9B:B6 Discovering: yes
[NEW] Device 74:7D:04:2F:F1:BA 74-7D-04-2F-F1-BA
[NEW] Device 88:0F:10:87:22:CE 88-0F-10-87-22-CE
[CHG] Device 88:0F:10:87:22:CE Name: MI_SCALE
[CHG] Device 88:0F:10:87:22:CE Alias: MI_SCALE
[NEW] Device 35:BD:7B:5D:CC:AE 35-BD-7B-5D-CC-AE
[NEW] Device 38:BC:1A:B2:9B:5D 38-BC-1A-B2-9B-5D
[CHG] Device 35:BD:7B:5D:CC:AE LegacyPairing: no
[CHG] Device 35:BD:7B:5D:CC:AE Name: J2-USB Bluetooth
[CHG] Device 35:BD:7B:5D:CC:AE Alias: J2-USB Bluetooth
[CHG] Device 38:BC:1A:B2:9B:5D Name: MEIZU MX4
[CHG] Device 38:BC:1A:B2:9B:5D Alias: MEIZU MX4
[NEW] Device 00:1A:7D:DA:71:13 00-1A-7D-DA-71-13
[CHG] Device 00:1A:7D:DA:71:13 RSSI: -76
[CHG] Device 00:1A:7D:DA:71:13 Name: JavieWong-PC
[CHG] Device 00:1A:7D:DA:71:13 Alias: JavieWong-PC
[CHG] Device 35:BD:7B:5D:CC:AE LegacyPairing: yes
[CHG] Device 35:BD:7B:5D:CC:AE RSSI: -48
[CHG] Device 38:BC:1A:B2:9B:5D UUIDs:00001112-0000-1000-8000-00805f9b34fb00001203-0000-1000-8000-00805f9b34fb0000111f-0000-1000-8000-00805f9b34fb00001116-0000-1000-8000-00805f9b34fb00001115-0000-1000-8000-00805f9b34fb0000110c-0000-1000-8000-00805f9b34fb0000110f-0000-1000-8000-00805f9b34fb0000110a-0000-1000-8000-00805f9b34fb
[CHG] Device 88:0F:10:87:22:CE RSSI: -92
[bluetooth]# pair 35:BD:7B:5D:CC:AE
Attempting to pair with 35:BD:7B:5D:CC:AE
[CHG] Device 35:BD:7B:5D:CC:AE Connected: yes
[CHG] Device 35:BD:7B:5D:CC:AE UUIDs:0000110b-0000-1000-8000-00805f9b34fb0000110e-0000-1000-8000-00805f9b34fb0000111e-0000-1000-8000-00805f9b34fb
[CHG] Device 35:BD:7B:5D:CC:AE Paired: yes
Pairing successful
[bluetooth]# connect 35:BD:7B:5D:CC:AE
Attempting to connect to 35:BD:7B:5D:CC:AE
[CHG] Device 35:BD:7B:5D:CC:AE Connected: yes
[bluetooth]# info 35:BD:7B:5D:CC:AE
Device 35:BD:7B:5D:CC:AEName: J2-USB BluetoothAlias: J2-USB BluetoothClass: 0x240404Icon: audio-cardPaired: yesTrusted: noBlocked: noConnected: yesLegacyPairing: yesUUID: Audio Sink (0000110b-0000-1000-8000-00805f9b34fb)UUID: A/V Remote Control (0000110e-0000-1000-8000-00805f9b34fb)UUID: Handsfree (0000111e-0000-1000-8000-00805f9b34fb)
[bluetooth]#
imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready!
imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22
imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready!
imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22
imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready!
imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22
imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready!
imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22
imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready!
imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22
imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready!
imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22
imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready!
imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22
imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready!
imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22
4.在另外一个控制终端中启动pulseaudio
//
root@imx6qsabresd:~# pulseaudio --system
W: [pulseaudio] main.c: Running in system mode, but --disallow-exit not set!
W: [pulseaudio] main.c: Running in system mode, but --disallow-module-loading not set!
N: [pulseaudio] main.c: Running in system mode, forcibly disabling SHM mode!
W: [pulseaudio] main.c: OK, so you are running PA in system mode. Please note that you most likely shouldn't be doing that.
W: [pulseaudio] main.c: If you do it nonetheless then it's your own fault if things don't work as expected.
W: [pulseaudio] main.c: Please read http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/WhatIsWrongWithSystemWide/ for an explanation why system mode is usually a bad idea.
E: [pulseaudio] module-alsa-card.c: Failed to find a working profile.
E: [pulseaudio] module.c: Failed to load module "module-alsa-card" (argument: "device_id="0" name="platform-sound-hdmi.21" card_name="alsa_card.platform-sound-hdmi.21" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes card_properties="module-udev-detect.discovered=1""): initialization failed.
W: [pulseaudio] authkey.c: Failed to open cookie file '/var/run/pulse/.config/pulse/cookie': No such file or directory
W: [pulseaudio] authkey.c: Failed to load authentication key '/var/run/pulse/.config/pulse/cookie': No such file or directory
W: [pulseaudio] authkey.c: Failed to open cookie file '/var/run/pulse/.pulse-cookie': No such file or directory
W: [pulseaudio] authkey.c: Failed to load authentication key '/var/run/pulse/.pulse-cookie': No such file or directory
5、配置默认音频输出设备
root@imx6qsabresd:~#pacmd help
Available commands:help Show this helplist-modules List loaded moduleslist-cards List cardslist-sinks List loaded sinkslist-sources List loaded sourceslist-clients List loaded clientslist-sink-inputs List sink inputslist-source-outputs List source outputsstat Show memory block statisticsinfo Show comprehensive statusload-module Load a module (args: name, arguments)unload-module Unload a module (args: index|name)describe-module Describe a module (arg: name)set-sink-volume Set the volume of a sink (args: index|name, volume)set-source-volume Set the volume of a source (args: index|name, volume)set-sink-mute Set the mute switch of a sink (args: index|name, bool)set-source-mute Set the mute switch of a source (args: index|name, bool)set-sink-input-volume Set the volume of a sink input (args: index, volume)set-source-output-volume Set the volume of a source output (args: index, volume)set-sink-input-mute Set the mute switch of a sink input (args: index, bool)set-source-output-mute Set the mute switch of a source output (args: index, bool)set-default-sink Set the default sink (args: index|name)set-default-source Set the default source (args: index|name)set-card-profile Change the profile of a card (args: index|name, profile-name)set-sink-port Change the port of a sink (args: index|name, port-name)set-source-port Change the port of a source (args: index|name, port-name)set-port-latency-offset Change the latency of a port (args: card-index|card-name, port-name, latency-offset)suspend-sink Suspend sink (args: index|name, bool)suspend-source Suspend source (args: index|name, bool)suspend Suspend all sinks and all sources (args: bool)move-sink-input Move sink input to another sink (args: index, sink)move-source-output Move source output to another source (args: index, source)update-sink-proplist Update the properties of a sink (args: index|name, properties)update-source-proplist Update the properties of a source (args: index|name, properties)update-sink-input-proplist Update the properties of a sink input (args: index, properties)update-source-output-proplist Update the properties of a source output (args: index, properties)list-samples List all entries in the sample cacheplay-sample Play a sample from the sample cache (args: name, sink|index)remove-sample Remove a sample from the sample cache (args: name)load-sample Load a sound file into the sample cache (args: name, filename)load-sample-lazy Lazily load a sound file into the sample cache (args: name, filename)load-sample-dir-lazy Lazily load all files in a directory into the sample cache (args: pathname)kill-client Kill a client (args: index)kill-sink-input Kill a sink input (args: index)kill-source-output Kill a source output (args: index)set-log-target Change the log target (args: null|auto|syslog|stderr|file:PATH|newfile:PATH)set-log-level Change the log level (args: numeric level)set-log-meta Show source code location in log messages (args: bool)set-log-time Show timestamps in log messages (args: bool)set-log-backtrace Show backtrace in log messages (args: frames)play-file Play a sound file (args: filename, sink|index)dump Dump daemon configurationdump-volumes Debug: Show the state of all volumesshared Debug: Show shared propertiesexit Terminate the daemon
root@imx6qsabresd:~#pactl list cards
Card #0Name: alsa_card.platform-sound.20Driver: module-alsa-card.cOwner Module: 7Properties:alsa.card = "0"alsa.card_name = "wm8962-audio"alsa.long_card_name = "wm8962-audio"device.bus_path = "platform-sound.20"sysfs.path = "/devices/soc0/sound.20/sound/card0"device.string = "0"device.description = "wm8962-audio"module-udev-detect.discovered = "1"device.icon_name = "audio-card"Profiles:input:analog-mono: Analog Mono Input (sinks: 0, sources: 1, priority: 2, available: yes)input:analog-stereo: Analog Stereo Input (sinks: 0, sources: 1, priority: 60, available: yes)output:analog-mono: Analog Mono Output (sinks: 1, sources: 0, priority: 200, available: yes)output:analog-mono+input:analog-mono: Analog Mono Duplex (sinks: 1, sources: 1, priority: 202, available: yes)output:analog-stereo: Analog Stereo Output (sinks: 1, sources: 0, priority: 6000, available: yes)output:analog-stereo+input:analog-stereo: Analog Stereo Duplex (sinks: 1, sources: 1, priority: 6060, available: yes)off: Off (sinks: 0, sources: 0, priority: 0, available: yes)Active Profile: output:analog-stereo+input:analog-stereoPorts:analog-input: Analog Input (priority: 10000, latency offset: 0 usec)Part of profile(s): input:analog-mono, input:analog-stereo, output:analog-mono+input:analog-mono, output:analog-stereo+input:analog-stereoanalog-output-speaker: Speakers (priority: 10000, latency offset: 0 usec, not available)Properties:device.icon_name = "audio-speakers"Part of profile(s): output:analog-mono, output:analog-mono+input:analog-mono, output:analog-stereo, output:analog-stereo+input:analog-stereoanalog-output-headphones: Headphones (priority: 9000, latency offset: 0 usec, available)Properties:device.icon_name = "audio-headphones"Part of profile(s): output:analog-mono, output:analog-mono+input:analog-mono, output:analog-stereo, output:analog-stereo+input:analog-stereo
如果发现板子上有单个声卡设备，则按照步骤5.1配置既可以，如果有多个声卡设备按照5.2步骤配置
5.1 单声音配置
Card #1Name: bluez_card.35_BD_7B_5D_CC_AEDriver: module-bluez5-device.cOwner Module: 24Properties:device.description = "J2-USB Bluetooth"device.string = "35:BD:7B:5D:CC:AE"device.api = "bluez"device.class = "sound"device.bus = "bluetooth"device.form_factor = "headset"bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE"bluez.class = "0x240404"bluez.alias = "J2-USB Bluetooth"device.icon_name = "audio-headset-bluetooth"device.intended_roles = "phone"Profiles:a2dp_sink: High Fidelity Playback (A2DP Sink) (sinks: 1, sources: 0, priority: 10, available: yes)headset_head_unit: Headset Head Unit (HSP/HFP) (sinks: 1, sources: 1, priority: 20, available: no)off: Off (sinks: 0, sources: 0, priority: 0, available: yes)Active Profile: a2dp_sinkPorts:headset-output: Headset (priority: 0, latency offset: 0 usec)Part of profile(s): a2dp_sink, headset_head_unitheadset-input: Headset (priority: 0, latency offset: 0 usec, not available)Part of profile(s): headset_head_unit
root@imx6qsabresd:~#pacmd list-sinks
1 sink(s) available.* index: 1name: <bluez_sink.35_BD_7B_5D_CC_AE>driver: <module-bluez5-device.c>flags: HARDWARE DECIBEL_VOLUME LATENCY state: SUSPENDEDsuspend cause: IDLE priority: 9030volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dBbalance 0.00base volume: 65536 / 100% / 0.00 dBvolume steps: 65537muted: nocurrent latency: 0.00 msmax request: 2 KiBmax rewind: 0 KiBmonitor source: 1sample spec: s16le 2ch 44100Hzchannel map: front-left,front-rightStereoused by: 0linked by: 0fixed latency: 39.51 mscard: 0 <bluez_card.35_BD_7B_5D_CC_AE>module: 24properties:bluetooth.protocol = "a2dp_sink"device.description = "J2-USB Bluetooth"device.string = "35:BD:7B:5D:CC:AE"device.api = "bluez"device.class = "sound"device.bus = "bluetooth"device.form_factor = "headset"bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE"bluez.class = "0x240404"bluez.alias = "J2-USB Bluetooth"device.icon_name = "audio-headset-bluetooth"device.intended_roles = "phone"ports:headset-output: Headset (priority 0, latency offset 0 usec, available: unknown)properties:active port: <headset-output>
root@imx6qsabresd:~#pacmd list-cards
1 card(s) available.index: 0name: <bluez_card.35_BD_7B_5D_CC_AE>driver: <module-bluez5-device.c>owner module: 24properties:device.description = "J2-USB Bluetooth"device.string = "35:BD:7B:5D:CC:AE"device.api = "bluez"device.class = "sound"device.bus = "bluetooth"device.form_factor = "headset"bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE"bluez.class = "0x240404"bluez.alias = "J2-USB Bluetooth"device.icon_name = "audio-headset-bluetooth"device.intended_roles = "phone"profiles:a2dp_sink: High Fidelity Playback (A2DP Sink) (priority 10, available: unknown)headset_head_unit: Headset Head Unit (HSP/HFP) (priority 20, available: no)off: Off (priority 0, available: yes)active profile: <a2dp_sink>sinks:bluez_sink.35_BD_7B_5D_CC_AE/#1: J2-USB Bluetoothsources:bluez_sink.35_BD_7B_5D_CC_AE.monitor/#1: Monitor of J2-USB Bluetoothports:headset-output: Headset (priority 0, latency offset 0 usec, available: unknown)properties:headset-input: Headset (priority 0, latency offset 0 usec, available: no)properties:root@imx6qsabresd:~#pacmd set-default-sink 1
root@imx6qsabresd:~#pacmd set-card-profile 0 a2dp_sink
root@imx6qsabresd:~#pacmd info
Memory blocks currently allocated: 1, size: 64.0 KiB.
Memory blocks allocated during the whole lifetime: 53616, size: 67.8 MiB.
Memory blocks imported from other processes: 0, size: 0 B.
Memory blocks exported to other processes: 0, size: 0 B.
Total sample cache size: 0 B.
Default sample spec: s16le 2ch 44100Hz
Default channel map: front-left,front-right
Default sink name: bluez_sink.35_BD_7B_5D_CC_AE
Default source name: bluez_sink.35_BD_7B_5D_CC_AE.monitor
Memory blocks of type POOL: 1 allocated/39706 accumulated.
Memory blocks of type POOL_EXTERNAL: 0 allocated/0 accumulated.
Memory blocks of type APPENDED: 0 allocated/0 accumulated.
Memory blocks of type USER: 0 allocated/0 accumulated.
Memory blocks of type FIXED: 0 allocated/0 accumulated.
Memory blocks of type IMPORTED: 0 allocated/13910 accumulated.
24 module(s) loaded.index: 0name: <module-device-restore>argument: <>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "Automatically restore the volume/mute state of devices"module.version = "6.0"index: 1name: <module-stream-restore>argument: <>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "Automatically restore the volume/mute/device state of streams"module.version = "6.0"index: 2name: <module-card-restore>argument: <>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "Automatically restore profile of cards"module.version = "6.0"index: 3name: <module-augment-properties>argument: <>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "Augment the property sets of streams with additional static information"module.version = "6.0"index: 4name: <module-switch-on-port-available>argument: <>used: -1load once: noproperties:index: 5name: <module-udev-detect>argument: <tsched=0>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "Detect available audio hardware and load matching drivers"module.version = "6.0"index: 7name: <module-bluetooth-policy>argument: <>used: -1load once: yesproperties:module.author = "Fr茅d茅ric Dalleau"module.description = "When a bluetooth sink or source is added, load module-loopback"module.version = "6.0"index: 8name: <module-bluetooth-discover>argument: <>used: -1load once: yesproperties:module.author = "Jo茫o Paulo Rechi Vita"module.description = "Detect available Bluetooth daemon and load the corresponding discovery module"module.version = "6.0"index: 9name: <module-bluez5-discover>argument: <>used: -1load once: yesproperties:module.author = "Jo茫o Paulo Rechi Vita"module.description = "Detect available BlueZ 5 Bluetooth audio devices and load BlueZ 5 Bluetooth audio drivers"module.version = "6.0"index: 10name: <module-native-protocol-unix>argument: <>used: -1load once: noproperties:module.author = "Lennart Poettering"module.description = "Native protocol (UNIX sockets)"module.version = "6.0"index: 11name: <module-default-device-restore>argument: <>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "Automatically restore the default sink and source"module.version = "6.0"index: 12name: <module-rescue-streams>argument: <>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "When a sink/source is removed, try to move its streams to the default sink/source"module.version = "6.0"index: 13name: <module-always-sink>argument: <>used: -1load once: yesproperties:module.author = "Colin Guthrie"module.description = "Always keeps at least one sink loaded even if it's a null one"module.version = "6.0"index: 15name: <module-intended-roles>argument: <>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "Automatically set device of streams based on intended roles of devices"module.version = "6.0"index: 16name: <module-suspend-on-idle>argument: <>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "When a sink/source is idle for too long, suspend it"module.version = "6.0"index: 17name: <module-console-kit>argument: <>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "Create a client for each ConsoleKit session of this user"module.version = "6.0"index: 18name: <module-position-event-sounds>argument: <>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "Position event sounds between L and R depending on the position on screen of the widget triggering them."module.version = "6.0"index: 19name: <module-role-cork>argument: <>used: -1load once: yesproperties:module.author = "Lennart Poettering"module.description = "Mute & cork streams with certain roles while others exist"module.version = "6.0"index: 20name: <module-filter-heuristics>argument: <>used: -1load once: yesproperties:module.author = "Colin Guthrie"module.description = "Detect when various filters are desirable"module.version = "6.0"index: 21name: <module-filter-apply>argument: <>used: -1load once: yesproperties:module.author = "Colin Guthrie"module.description = "Load filter sinks automatically when needed"module.version = "6.0"index: 22name: <module-x11-publish>argument: <display=:0>used: -1load once: noproperties:module.author = "Lennart Poettering"module.description = "X11 credential publisher"module.version = "6.0"index: 23name: <module-x11-cork-request>argument: <display=:0>used: -1load once: noproperties:module.author = "Lennart Poettering"module.description = "Synthesize X11 media key events when cork/uncork is requested"module.version = "6.0"index: 24name: <module-bluez5-device>argument: <path=/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE>used: 0load once: noproperties:module.author = "Jo茫o Paulo Rechi Vita"module.description = "BlueZ 5 Bluetooth audio sink and source"module.version = "6.0"index: 25name: <module-cli-protocol-unix>argument: <>used: -1load once: noproperties:module.author = "Lennart Poettering"module.description = "Command line interface protocol (UNIX sockets)"module.version = "6.0"
1 sink(s) available.* index: 1name: <bluez_sink.35_BD_7B_5D_CC_AE>driver: <module-bluez5-device.c>flags: HARDWARE DECIBEL_VOLUME LATENCY state: SUSPENDEDsuspend cause: IDLE priority: 9030volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dBbalance 0.00base volume: 65536 / 100% / 0.00 dBvolume steps: 65537muted: nocurrent latency: 0.00 msmax request: 2 KiBmax rewind: 0 KiBmonitor source: 1sample spec: s16le 2ch 44100Hzchannel map: front-left,front-rightStereoused by: 0linked by: 0fixed latency: 39.51 mscard: 0 <bluez_card.35_BD_7B_5D_CC_AE>module: 24properties:bluetooth.protocol = "a2dp_sink"device.description = "J2-USB Bluetooth"device.string = "35:BD:7B:5D:CC:AE"device.api = "bluez"device.class = "sound"device.bus = "bluetooth"device.form_factor = "headset"bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE"bluez.class = "0x240404"bluez.alias = "J2-USB Bluetooth"device.icon_name = "audio-headset-bluetooth"device.intended_roles = "phone"ports:headset-output: Headset (priority 0, latency offset 0 usec, available: unknown)properties:active port: <headset-output>
1 source(s) available.* index: 1name: <bluez_sink.35_BD_7B_5D_CC_AE.monitor>driver: <module-bluez5-device.c>flags: DECIBEL_VOLUME LATENCY state: SUSPENDEDsuspend cause: IDLE priority: 1030volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dBbalance 0.00base volume: 65536 / 100% / 0.00 dBvolume steps: 65537muted: nocurrent latency: 0.00 msmax rewind: 0 KiBsample spec: s16le 2ch 44100Hzchannel map: front-left,front-rightStereoused by: 0linked by: 0fixed latency: 39.51 msmonitor_of: 1card: 0 <bluez_card.35_BD_7B_5D_CC_AE>module: 24properties:device.description = "Monitor of J2-USB Bluetooth"device.class = "monitor"device.string = "35:BD:7B:5D:CC:AE"device.api = "bluez"device.bus = "bluetooth"device.form_factor = "headset"bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE"bluez.class = "0x240404"bluez.alias = "J2-USB Bluetooth"device.icon_name = "audio-headset-bluetooth"device.intended_roles = "phone"
1 client(s) logged in.index: 26driver: <cli.c>owner module: 25properties:application.name = "UNIX socket client"
1 card(s) available.index: 0name: <bluez_card.35_BD_7B_5D_CC_AE>driver: <module-bluez5-device.c>owner module: 24properties:device.description = "J2-USB Bluetooth"device.string = "35:BD:7B:5D:CC:AE"device.api = "bluez"device.class = "sound"device.bus = "bluetooth"device.form_factor = "headset"bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE"bluez.class = "0x240404"bluez.alias = "J2-USB Bluetooth"device.icon_name = "audio-headset-bluetooth"device.intended_roles = "phone"profiles:a2dp_sink: High Fidelity Playback (A2DP Sink) (priority 10, available: unknown)headset_head_unit: Headset Head Unit (HSP/HFP) (priority 20, available: no)off: Off (priority 0, available: yes)active profile: <a2dp_sink>sinks:bluez_sink.35_BD_7B_5D_CC_AE/#1: J2-USB Bluetoothsources:bluez_sink.35_BD_7B_5D_CC_AE.monitor/#1: Monitor of J2-USB Bluetoothports:headset-output: Headset (priority 0, latency offset 0 usec, available: unknown)properties:headset-input: Headset (priority 0, latency offset 0 usec, available: no)properties:0 sink input(s) available.
0 source output(s) available.
0 cache entrie(s) available.
root@imx6qsabresd:~#pacmd stat
Memory blocks currently allocated: 1, size: 64.0 KiB.
Memory blocks allocated during the whole lifetime: 53616, size: 67.8 MiB.
Memory blocks imported from other processes: 0, size: 0 B.
Memory blocks exported to other processes: 0, size: 0 B.
Total sample cache size: 0 B.
Default sample spec: s16le 2ch 44100Hz
Default channel map: front-left,front-right
Default sink name: bluez_sink.35_BD_7B_5D_CC_AE
Default source name: bluez_sink.35_BD_7B_5D_CC_AE.monitor
Memory blocks of type POOL: 1 allocated/39706 accumulated.
Memory blocks of type POOL_EXTERNAL: 0 allocated/0 accumulated.
Memory blocks of type APPENDED: 0 allocated/0 accumulated.
Memory blocks of type USER: 0 allocated/0 accumulated.
Memory blocks of type FIXED: 0 allocated/0 accumulated.
Memory blocks of type IMPORTED: 0 allocated/13910 accumulated.
5.2 多声卡设备配置
root@imx6qsabresd:~# pacmd set-card-profile 1 a2dp_sink
root@imx6qsabresd:~# pactl list sinks
Sink #0State: SUSPENDEDName: alsa_output.platform-sound.20.analog-stereoDescription: wm8962-audio Analog StereoDriver: module-alsa-card.cSample Specification: s16le 2ch 44100HzChannel Map: front-left,front-rightOwner Module: 7Mute: noVolume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dBbalance 0.00Base Volume: 65536 / 100% / 0.00 dBMonitor Source: alsa_output.platform-sound.20.analog-stereo.monitorLatency: 0 usec, configured 0 usecFlags: HARDWARE DECIBEL_VOLUME LATENCY Properties:alsa.resolution_bits = "16"device.api = "alsa"device.class = "sound"alsa.class = "generic"alsa.subclass = "generic-mix"alsa.name = ""alsa.id = "HiFi wm8962-0"alsa.subdevice = "0"alsa.subdevice_name = "subdevice #0"alsa.device = "0"alsa.card = "0"alsa.card_name = "wm8962-audio"alsa.long_card_name = "wm8962-audio"device.bus_path = "platform-sound.20"sysfs.path = "/devices/soc0/sound.20/sound/card0"device.string = "hw:0"device.buffering.buffer_size = "17632"device.buffering.fragment_size = "4408"device.access_mode = "mmap"device.profile.name = "analog-stereo"device.profile.description = "Analog Stereo"device.description = "wm8962-audio Analog Stereo"module-udev-detect.discovered = "1"device.icon_name = "audio-card"Ports:analog-output-speaker: Speakers (priority: 10000, not available)analog-output-headphones: Headphones (priority: 9000, available)Active Port: analog-output-headphonesFormats:pcmSink #1State: SUSPENDEDName: bluez_sink.35_BD_7B_5D_CC_AEDescription: J2-USB BluetoothDriver: module-bluez5-device.cSample Specification: s16le 2ch 44100HzChannel Map: front-left,front-rightOwner Module: 24Mute: noVolume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dBbalance 0.00Base Volume: 65536 / 100% / 0.00 dBMonitor Source: bluez_sink.35_BD_7B_5D_CC_AE.monitorLatency: 0 usec, configured 0 usecFlags: HARDWARE DECIBEL_VOLUME LATENCY Properties:bluetooth.protocol = "a2dp_sink"device.description = "J2-USB Bluetooth"device.string = "35:BD:7B:5D:CC:AE"device.api = "bluez"device.class = "sound"device.bus = "bluetooth"device.form_factor = "headset"bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE"bluez.class = "0x240404"bluez.alias = "J2-USB Bluetooth"device.icon_name = "audio-headset-bluetooth"device.intended_roles = "phone"Ports:headset-output: Headset (priority: 0)Active Port: headset-outputFormats:pcm
root@imx6qsabresd:~# pacmd set-default-sink 1
root@imx6qsabresd:~# pactl list sources
Source #0State: SUSPENDEDName: alsa_output.platform-sound.20.analog-stereo.monitorDescription: Monitor of wm8962-audio Analog StereoDriver: module-alsa-card.cSample Specification: s16le 2ch 44100HzChannel Map: front-left,front-rightOwner Module: 7Mute: noVolume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dBbalance 0.00Base Volume: 65536 / 100% / 0.00 dBMonitor of Sink: alsa_output.platform-sound.20.analog-stereoLatency: 0 usec, configured 0 usecFlags: DECIBEL_VOLUME LATENCY Properties:device.description = "Monitor of wm8962-audio Analog Stereo"device.class = "monitor"alsa.card = "0"alsa.card_name = "wm8962-audio"alsa.long_card_name = "wm8962-audio"device.bus_path = "platform-sound.20"sysfs.path = "/devices/soc0/sound.20/sound/card0"device.string = "0"module-udev-detect.discovered = "1"device.icon_name = "audio-card"Formats:pcmSource #1State: SUSPENDEDName: alsa_input.platform-sound.20.analog-stereoDescription: wm8962-audio Analog StereoDriver: module-alsa-card.cSample Specification: s16le 2ch 44100HzChannel Map: front-left,front-rightOwner Module: 7Mute: noVolume: front-left: 33804 / 52% / -17.25 dB, front-right: 33804 / 52% / -17.25 dBbalance 0.00Base Volume: 26090 / 40% / -24.00 dBMonitor of Sink: n/aLatency: 0 usec, configured 0 usecFlags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY Properties:alsa.resolution_bits = "16"device.api = "alsa"device.class = "sound"alsa.class = "generic"alsa.subclass = "generic-mix"alsa.name = ""alsa.id = "HiFi wm8962-0"alsa.subdevice = "0"alsa.subdevice_name = "subdevice #0"alsa.device = "0"alsa.card = "0"alsa.card_name = "wm8962-audio"alsa.long_card_name = "wm8962-audio"device.bus_path = "platform-sound.20"sysfs.path = "/devices/soc0/sound.20/sound/card0"device.string = "hw:0"device.buffering.buffer_size = "17632"device.buffering.fragment_size = "4408"device.access_mode = "mmap"device.profile.name = "analog-stereo"device.profile.description = "Analog Stereo"device.description = "wm8962-audio Analog Stereo"module-udev-detect.discovered = "1"device.icon_name = "audio-card"Ports:analog-input: Analog Input (priority: 10000)Active Port: analog-inputFormats:pcmSource #2State: SUSPENDEDName: bluez_sink.35_BD_7B_5D_CC_AE.monitorDescription: Monitor of J2-USB BluetoothDriver: module-bluez5-device.cSample Specification: s16le 2ch 44100HzChannel Map: front-left,front-rightOwner Module: 24Mute: noVolume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dBbalance 0.00Base Volume: 65536 / 100% / 0.00 dBMonitor of Sink: bluez_sink.35_BD_7B_5D_CC_AELatency: 0 usec, configured 0 usecFlags: DECIBEL_VOLUME LATENCY Properties:device.description = "Monitor of J2-USB Bluetooth"device.class = "monitor"device.string = "35:BD:7B:5D:CC:AE"device.api = "bluez"device.bus = "bluetooth"device.form_factor = "headset"bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE"bluez.class = "0x240404"bluez.alias = "J2-USB Bluetooth"device.icon_name = "audio-headset-bluetooth"device.intended_roles = "phone"Formats:pcm
root@imx6qsabresd:~# pacmd set-default-source 2
5.3 测试蓝牙耳机
//在终端中使用pactl list命令查看此时的配置已经OK
root@imx6qsabresd:~# pactl list sinks
Sink #1State: SUSPENDEDName: bluez_sink.35_BD_7B_5D_CC_AEDescription: J2-USB BluetoothDriver: module-bluez5-device.cSample Specification: s16le 2ch 44100HzChannel Map: front-left,front-rightOwner Module: 24Mute: noVolume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dBbalance 0.00Base Volume: 65536 / 100% / 0.00 dBMonitor Source: bluez_sink.35_BD_7B_5D_CC_AE.monitorLatency: 0 usec, configured 0 usecFlags: HARDWARE DECIBEL_VOLUME LATENCY Properties:bluetooth.protocol = "a2dp_sink"device.description = "J2-USB Bluetooth"device.string = "35:BD:7B:5D:CC:AE"device.api = "bluez"device.class = "sound"device.bus = "bluetooth"device.form_factor = "headset"bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE"bluez.class = "0x240404"bluez.alias = "J2-USB Bluetooth"device.icon_name = "audio-headset-bluetooth"device.intended_roles = "phone"Ports:headset-output: Headset (priority: 0)Active Port: headset-outputFormats:pcm
root@imx6qsabresd:~# pactl list cards
Card #0Name: bluez_card.35_BD_7B_5D_CC_AEDriver: module-bluez5-device.cOwner Module: 24Properties:device.description = "J2-USB Bluetooth"device.string = "35:BD:7B:5D:CC:AE"device.api = "bluez"device.class = "sound"device.bus = "bluetooth"device.form_factor = "headset"bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE"bluez.class = "0x240404"bluez.alias = "J2-USB Bluetooth"device.icon_name = "audio-headset-bluetooth"device.intended_roles = "phone"Profiles:a2dp_sink: High Fidelity Playback (A2DP Sink) (sinks: 1, sources: 0, priority: 10, available: yes)headset_head_unit: Headset Head Unit (HSP/HFP) (sinks: 1, sources: 1, priority: 20, available: no)off: Off (sinks: 0, sources: 0, priority: 0, available: yes)Active Profile: a2dp_sinkPorts:headset-output: Headset (priority: 0, latency offset: 0 usec)Part of profile(s): a2dp_sink, headset_head_unitheadset-input: Headset (priority: 0, latency offset: 0 usec, not available)Part of profile(s): headset_head_unit
6.使用aplay软件播放音乐
6.1 aplay有时候可以正常播放，有时候不行，不清楚原因
root@imx6qsabresd:~#aplay test.wav
6.2 使用gstream播放器
//噪声测试
root@imx6qsabresd:~# gst-launch-1.0 audiotestsrc ! pulsesink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstPulseSinkClock
imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready!
imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22
//播放wav文件
root@imx6qsabresd:~# gst-launch-1.0 filesrc location=audio8k16S.wav ! wavparse !
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstPulseSinkClock
Got EOS from element "pipeline0".
Execution ended after 0:00:05.090986334
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
autoaudiosinkesd
6.3 使用paplay测试
paplay audio8k16S.wav
遇到的问题：
1.
W: [pulseaudio] main.c: This program is not intended to be run as root (unless –system is specified).
E: [pulseaudio] core-util.c: Home directory not accessible: Permission denied
解决办法：启动时加上pulseaudio --system
W: [pulseaudio] main.c: Running in system mode, but –disallow-exit not set!
W: [pulseaudio] main.c: Running in system mode, but –disallow-module-loading not set!
N: [pulseaudio] main.c: Running in system mode, forcibly disabling SHM mode!
N: [pulseaudio] main.c: Running in system mode, forcibly disabling exit idle time!
E: [pulseaudio] main.c: Failed to find user ‘pulse’.
解决办法：新建用户pulse
root@imx6qsabresd:~#useradd pulse
启动bluetoothctl时提示No default controller available
解决办法：没有启动bluetoothd
root@imx6qsabresd:~#bluetoothd&
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