One more follow up.
When bluetooth headset was firstly paired and connected after my
laptop reboots, aplay can do a 8000 sample rate wave file through
bluetooth headset properly.
However, after keep running aplay through bluetooth headset for about
10 times, it won't play any sound anymore.
Restart bluetoothd, repair/connect bluetooth headset won't help. I
would have to reboot my laptop, then aplay works for about 10 times
before becomes silent again.
Any suggestions?
Cheers,
Harry
On Tue, Mar 29, 2016 at 10:05 AM, Qingtao Cao <qingtao.cao.au@xxxxxxxxx> wrote:
> Hi Community,
>
> I kept debugging this issue for the past a couple of weeks, didn't
> make much advances yet but found one interesting fact.
>
> The default Front_Center.wav file's sample rate is 48000, when using
> gdb to observe the calltrace for bluetooth_hsp_write(), I found that
> alsa-lib has introduced a nested plugins structure, in particular, a
> "rate" plugin to master another slave "ioplug" plugin. It seems that
> the master "rate" plugin is used to convert the sample rate from 48000
> to 8000.
>
> It is when this rate plugin is used that the low level
> bluetooth_hsp_write() is not correctly invoked by aplay's pcm_write -
> no more than two mtu amount of frames are transmitted before pcm_write
> thought all data has been sent successfully.
>
> So on my laptop I used arecord to generate a wav file with 8000 sample
> rate, then I found it can be properly played by "aplay -D btheadset"
> successfully ! :-)
>
> I tried to register the alsa-lib mailing list for further opinions but
> my subscription not approved in one week.
>
> Moreover, although aplay can play a 8000 sample rate wav file through
> bluetooth headset, after playing it a couple of times, there is no
> sound output anymore, although aplay can process the wav file as
> normal. Also the debug info of bluetoothd doesn't look fishy:
>
>
> $ hcitool con
> Connections:
> < ACL 1C:48:F9:AD:19:EE handle 70 state 1 lm MASTER AUTH ENCRYPT
>
> $ aplay -D btheadset my_record_8k.wav
> Playing WAVE 'my_record_8k.wav' : Signed 16 bit Little Endian, Rate
> 8000 Hz, Mono
> $
>
>
> bluetoothd[4102]: audio/unix.c:server_cb() Accepted new client
> connection on unix socket (fd=33)
> bluetoothd[4102]: audio/unix.c:client_cb() Audio API: BT_REQUEST <-
> BT_GET_CAPABILITIES
> bluetoothd[4102]: audio/unix.c:unix_ipc_sendmsg() Audio API:
> BT_RESPONSE -> BT_GET_CAPABILITIES
> bluetoothd[4102]: audio/unix.c:client_cb() Audio API: BT_REQUEST <- BT_OPEN
> bluetoothd[4102]: audio/unix.c:handle_sco_open() open sco - object=ANY
> source=ANY destination=1C:48:F9:AD:19:EE lock=write
> bluetoothd[4102]: audio/unix.c:unix_ipc_sendmsg() Audio API:
> BT_RESPONSE -> BT_OPEN
> bluetoothd[4102]: audio/unix.c:client_cb() Audio API: BT_REQUEST <-
> BT_SET_CONFIGURATION
> bluetoothd[4102]: audio/unix.c:unix_ipc_sendmsg() Audio API:
> BT_RESPONSE -> BT_SET_CONFIGURATION
> bluetoothd[4102]: audio/unix.c:client_cb() Audio API: BT_REQUEST <-
> BT_START_STREAM
> bluetoothd[4102]: audio/headset.c:headset_set_state() State changed
> /org/bluez/4102/hci1/dev_1C_48_F9_AD_19_EE: HEADSET_STATE_CONNECTED ->
> HEADSET_STATE_PLAY_IN_PROGRESS
> bluetoothd[4102]: audio/media.c:headset_state_changed()
> bluetoothd[4102]: audio/media.c:headset_state_changed()
> bluetoothd[4102]: audio/headset.c:sco_connect_cb() SCO socket opened
> for headset /org/bluez/4102/hci1/dev_1C_48_F9_AD_19_EE
> bluetoothd[4102]: audio/headset.c:sco_connect_cb() SCO fd=35
> bluetoothd[4102]: audio/unix.c:unix_ipc_sendmsg() Audio API:
> BT_RESPONSE -> BT_START_STREAM
> bluetoothd[4102]: audio/unix.c:unix_ipc_sendmsg() Audio API:
> BT_INDICATION -> BT_NEW_STREAM
> bluetoothd[4102]: audio/headset.c:headset_set_state() State changed
> /org/bluez/4102/hci1/dev_1C_48_F9_AD_19_EE:
> HEADSET_STATE_PLAY_IN_PROGRESS -> HEADSET_STATE_PLAYING
> bluetoothd[4102]: audio/media.c:headset_state_changed()
> bluetoothd[4102]: audio/media.c:headset_state_changed()
> bluetoothd[4102]: audio/transport.c:media_transport_acquire()
> Transport /org/bluez/4102/hci1/dev_1C_48_F9_AD_19_EE/fd5: read lock
> acquired
> bluetoothd[4102]: audio/transport.c:media_transport_acquire()
> Transport /org/bluez/4102/hci1/dev_1C_48_F9_AD_19_EE/fd5: write lock
> acquired
> bluetoothd[4102]: audio/transport.c:media_owner_create() Owner
> created: sender=:1.76 accesstype=rw
> bluetoothd[4102]: audio/transport.c:media_transport_release()
> Transport /org/bluez/4102/hci1/dev_1C_48_F9_AD_19_EE/fd5: read lock
> released
> bluetoothd[4102]: audio/transport.c:media_transport_release()
> Transport /org/bluez/4102/hci1/dev_1C_48_F9_AD_19_EE/fd5: write lock
> released
> bluetoothd[4102]: audio/transport.c:media_owner_free() Owner :1.76
> bluetoothd[4102]: audio/unix.c:client_cb() Unix client disconnected (fd=33)
> bluetoothd[4102]: audio/headset.c:headset_set_state() State changed
> /org/bluez/4102/hci1/dev_1C_48_F9_AD_19_EE: HEADSET_STATE_PLAYING ->
> HEADSET_STATE_CONNECTED
> bluetoothd[4102]: audio/media.c:headset_state_changed()
> bluetoothd[4102]: audio/media.c:headset_state_changed()
> bluetoothd[4102]: audio/unix.c:client_free() client_free(0x7f9e16071e00)
>
>
> I tried to restart the bluetoothd and re-pair/connect the bluetooth
> headset, but got the same result. Any idea?
>
> Moreover, how can I use the VolumeUp/Down method on org.bluez.Control
> interface to control the volume of the bluetooth headset properly?
>
> $ echo $DEVICE
> /org/bluez/4102/hci1/dev_1C_48_F9_AD_19_EE
> $ dbus-send --system --print-reply --dest=org.bluez $DEVICE
> org.bluez.Control.VolumeUp
> Error org.freedesktop.DBus.Error.UnknownMethod: Method "VolumeUp" with
> signature "" on interface "org.bluez.Control" doesn't exist
>
> Cheers,
> Harry
>
>
>
>
> On Fri, Mar 18, 2016 at 7:57 PM, Qingtao Cao <qingtao.cao.au@xxxxxxxxx> wrote:
>> Thanks Lukasz for your kind reply!
>>
>> Frankly speaking I have been working on bluez 4.101 for several months
>> and validated quite some aspects of it, so it could be too costly for
>> me to upgrade to bluez 5 at the end of the game.
>>
>> Cheers,
>> Harry
>>
>> On Fri, Mar 18, 2016 at 5:01 PM, Łukasz Rymanowski
>> <lukasz.rymanowski@xxxxxxxxxxx> wrote:
>>> Hi Harry,
>>>
>>> On 18 March 2016 at 06:57, Qingtao Cao <qingtao.cao.au@xxxxxxxxx> wrote:
>>>> Hi Community,
>>>>
>>>> I kept debugging this issue today and found out that aplay failed to
>>>> send out the .wav file content to bluetooth headset.
>>>>
>>>> From the "strace aplay -D btheadset .wav" I can see that the wav file
>>>> is read in 12000B chunk, but sent to bluetooth socket in 48B chunk of
>>>> data. Compared with the strace result for aplay through speaker, the
>>>> wav file can be read correctly, however, when using bluetooth headset
>>>> aplay always seems to send 48B zero again and again.
>>>>
>>>> This explains why there is no sound output at all.
>>>>
>>>> fd 6 is the opened wav file.
>>>> fd 7 is the connection with /org/bluez/audio.
>>>>
>>>> ...
>>>> read(6, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 12000) = 12000
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> read(6, "w\37\210 \21!\6!\320 q
>>>> \244\37u\36b\35\222\34a\33\314\31\267\30C\30\265\27\234\26"..., 12000)
>>>> = 12000
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> read(6, "\t\23\205\23\27\24\206\24\330\24G\25\301\25!\26x\26\335\26B\27\211\27\301\27\24\30`\30\211\30"...,
>>>> 12000) = 12000
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> read(6, "\334\377\343\377\347\377\337\377\332\377\340\377\344\377\342\377\337\377\327\377\324\377\345\377\350\377\331\377\343\377\362\377"...,
>>>> 12000) = 12000
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> clock_gettime(CLOCK_REALTIME, {1457576840, 978074823}) = 0
>>>> read(6, "\374\377\361\377\345\377\363\377\366\377\361\377\364\377\364\377\367\377\370\377\352\377\352\377\371\377\362\377\360\377\4\0"...,
>>>> 12000) = 12000
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> send(7, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
>>>> 48, 0) = 48
>>>> ... (endless sending 48b of zeros) ...
>>>>
>>>> Any comments?
>>>>
>>>> Thanks,
>>>> Harry
>>>>
>>>> On Thu, Mar 17, 2016 at 2:47 PM, Qingtao Cao <qingtao.cao.au@xxxxxxxxx> wrote:
>>>>> Hi Community,
>>>>>
>>>>> I run into a bluetooth headset issue with bluez 4.101. After a
>>>>> successful pairing and connection, I failed to play a .wav file
>>>>> through the bluetooth headset by aplay. I have been searching around
>>>>> for a couple days and looked at bluez 4.101 source code to ensure the
>>>>> audio.conf settings make sense but still clueless.
>>>>>
>>>>> My laptop is Ubuntu 15.04 with bluez 4.101-ubuntu25 (kernel:
>>>>> 3.19.0-25-generic), the target embedded uses yocto "dizzy" release
>>>>> with bluez 4.101 as well (kernel: 3.4).
>>>
>>> I recommend to use ubuntu 15.10 which have new BlueZ 5.x on it.
>>>
>>> On both laptop and target
>>>>> machine the libasound-module-bluez has been installed properly.
>>>>>
>>>>> My settings are:
>>>>>
>>>>> 1. /etc/bluetooth/main.conf
>>>>> The default one, in particular, Class=0x00100
>>>>>
>>>>> 2. /etc/bluetooth/audio.conf
>>>>>
>>>>> [General]
>>>>> Enable=Socket
>>>>>
>>>>> [Headset]
>>>>> HFP=true
>>>>> MaxConnected=1
>>>>> FastConnectable=false
>>>>>
>>>>> [A2DP]
>>>>> SBCSources=1
>>>>> SBCSinks=1
>>>>> MPEG12Sources=1
>>>>> MPEG12Sinks=1
>>>>>
>>>>> 3. ~/.asoundrc
>>>>> pcm.btheadset {
>>>>> type plug
>>>>> slave {
>>>>> pcm {
>>>>> type bluetooth
>>>>> device "1C:48:F9:AD:19:EE"
>>>>> profile "auto"
>>>>> }
>>>>> }
>>>>>
>>>>> hint {
>>>>> show on
>>>>> description "BT Headset"
>>>>> }
>>>>> }
>>>>>
>>>>> ctl.btheadset {
>>>>> type bluetooth
>>>>> }
>>>>>
>>>>> where I have hardcoded the bdaddr of my bluetooth headset.
>>>>>
>>>>> 4. My bluetooth headset has been paired and connected successfully:
>>>>>
>>>>> $ hcitool con
>>>>> Connections:
>>>>> < eSCO 1C:48:F9:AD:19:EE handle 70 state 1 lm MASTER
>>>>> < ACL 1C:48:F9:AD:19:EE handle 69 state 1 lm MASTER AUTH ENCRYPT
>>>>>
>>>>>
>>>>> 5. On my laptop, I can play through bluetooth headset with mplayer successfully:
>>>>>
>>>>> $ mplayer -ao alsa:device=btheadset /usr/share/sounds/alsa/Front_Center.wav
>>>>>
>>>>> MPlayer2 2.0-728-g2c378c7-4 (C) 2000-2012 MPlayer Team
>>>>> Cannot open file '/home/harry/.mplayer/input.conf': No such file
>>>>> or directory
>>>>> Failed to open /home/harry/.mplayer/input.conf.
>>>>> Cannot open file '/etc/mplayer/input.conf': No such file or directory
>>>>> Failed to open /etc/mplayer/input.conf.
>>>>>
>>>>> Playing /usr/share/sounds/alsa/Front_Center.wav.
>>>>> Detected file format: WAV / WAVE (Waveform Audio) (libavformat)
>>>>> [lavf] stream 0: audio (pcm_s16le), -aid 0
>>>>> Load subtitles in /usr/share/sounds/alsa/
>>>>> Selected audio codec: Uncompressed PCM [pcm]
>>>>> AUDIO: 48000 Hz, 1 ch, s16le, 768.0 kbit/100.00% (ratio: 96000->96000)
>>>>> AO: [alsa] 8000Hz 1ch s16le (2 bytes per sample)
>>>>> Video: no video
>>>>> Starting playback...
>>>>> A: 1.4 (01.4) of 1.4 (01.4) 0.1%
>>>>>
>>>>> Exiting... (End of file)
>>>>>
>>>>>
>>>>> 6. However, on my laptop, play with aplay failed:
>>>>>
>>>>> $ aplay -D btheadset /usr/share/sounds/alsa/Front_Center.wav
>>>>>
>>>>> Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16
>>>>> bit Little Endian, Rate 48000 Hz, Mono
>>>>> ^CAborted by signal Interrupt...
>>>>>
>>>>> All I got is constant beeeeep noises and I have to press Ctrl^C to terminate it.
>>>>>
>>>>> 7. On my target machine, the rootfs is provided by "dizzy" yocto
>>>>> release also with bluez 4.101. I have modified main.conf to define
>>>>> "Class=0x5A020C" (or simply 0x000200) and audio.conf to enable
>>>>> "SCORouting=PCM".
>>>>>
>>>>> 8. On my target machine, the same aplay command failed as well. But it
>>>>> doesn't output any sound, no constant beep noise. Only when I
>>>>> terminated it could I hear a short beep sound.
>>>>>
>>>>>
>>>>> Given that mplayer works on bluetooth headset, I thought the bridging
>>>>> from alsa to bluez works. However, why aplay failed? On my target
>>>>> there is only aplay now and it's difficult to add mplay, so I would
>>>>> have to make aplay work with bluetooth audio.
>>>>>
>>>>> Any comments are much appreciated!
>>>>>
>>>>> Cheers,
>>>>> Harry
>>>>>
>>>>>
>>>>> P.S.
>>>>>
>>>>> The following is the "bluetoothd -d -n" result during "aplay -D btheadset ...":
>>>>>
>>>>> bluetoothd[9490]: audio/unix.c:server_cb() Accepted new client
>>>>> connection on unix socket (fd=33)
>>>>> bluetoothd[9490]: audio/unix.c:client_cb() Audio API: BT_REQUEST <-
>>>>> BT_GET_CAPABILITIES
>>>>> bluetoothd[9490]: audio/unix.c:unix_ipc_sendmsg() Audio API:
>>>>> BT_RESPONSE -> BT_GET_CAPABILITIES
>>>>> bluetoothd[9490]: audio/unix.c:client_cb() Audio API: BT_REQUEST <- BT_OPEN
>>>>> bluetoothd[9490]: audio/unix.c:handle_sco_open() open sco - object=ANY
>>>>> source=ANY destination=1C:48:F9:AD:19:EE lock=write
>>>>> bluetoothd[9490]: audio/unix.c:unix_ipc_sendmsg() Audio API:
>>>>> BT_RESPONSE -> BT_OPEN
>>>>> bluetoothd[9490]: audio/unix.c:client_cb() Audio API: BT_REQUEST <-
>>>>> BT_SET_CONFIGURATION
>>>>> bluetoothd[9490]: audio/unix.c:unix_ipc_sendmsg() Audio API:
>>>>> BT_RESPONSE -> BT_SET_CONFIGURATION
>>>>> bluetoothd[9490]: audio/unix.c:client_cb() Audio API: BT_REQUEST <-
>>>>> BT_START_STREAM
>>>>> bluetoothd[9490]: audio/headset.c:headset_set_state() State changed
>>>>> /org/bluez/9490/hci1/dev_1C_48_F9_AD_19_EE: HEADSET_STATE_CONNECTED ->
>>>>> HEADSET_STATE_PLAY_IN_PROGRESS
>>>>> bluetoothd[9490]: audio/media.c:headset_state_changed()
>>>>> bluetoothd[9490]: audio/media.c:headset_state_changed()
>>>>> bluetoothd[9490]: audio/headset.c:sco_connect_cb() SCO socket opened
>>>>> for headset /org/bluez/9490/hci1/dev_1C_48_F9_AD_19_EE
>>>>> bluetoothd[9490]: audio/headset.c:sco_connect_cb() SCO fd=35
>>>>> bluetoothd[9490]: audio/unix.c:unix_ipc_sendmsg() Audio API:
>>>>> BT_RESPONSE -> BT_START_STREAM
>>>>> bluetoothd[9490]: audio/unix.c:unix_ipc_sendmsg() Audio API:
>>>>> BT_INDICATION -> BT_NEW_STREAM
>>>>> bluetoothd[9490]: audio/headset.c:headset_set_state() State changed
>>>>> /org/bluez/9490/hci1/dev_1C_48_F9_AD_19_EE:
>>>>> HEADSET_STATE_PLAY_IN_PROGRESS -> HEADSET_STATE_PLAYING
>>>>> bluetoothd[9490]: audio/media.c:headset_state_changed()
>>>>> bluetoothd[9490]: audio/media.c:headset_state_changed()
>>>>> bluetoothd[9490]: audio/transport.c:media_transport_acquire()
>>>>> Transport /org/bluez/9490/hci1/dev_1C_48_F9_AD_19_EE/fd0: read lock
>>>>> acquired
>>>>> bluetoothd[9490]: audio/transport.c:media_transport_acquire()
>>>>> Transport /org/bluez/9490/hci1/dev_1C_48_F9_AD_19_EE/fd0: write lock
>>>>> acquired
>>>>> bluetoothd[9490]: audio/transport.c:media_owner_create() Owner
>>>>> created: sender=:1.309 accesstype=rw
>>>>> bluetoothd[9490]: audio/transport.c:media_transport_release()
>>>>> Transport /org/bluez/9490/hci1/dev_1C_48_F9_AD_19_EE/fd0: read lock
>>>>> released
>>>>> bluetoothd[9490]: audio/transport.c:media_transport_release()
>>>>> Transport /org/bluez/9490/hci1/dev_1C_48_F9_AD_19_EE/fd0: write lock
>>>>> released
>>>>> bluetoothd[9490]: audio/transport.c:media_owner_free() Owner :1.309
>>>>> bluetoothd[9490]: audio/unix.c:client_cb() Unix client disconnected (fd=33)
>>>>> bluetoothd[9490]: audio/headset.c:headset_set_state() State changed
>>>>> /org/bluez/9490/hci1/dev_1C_48_F9_AD_19_EE: HEADSET_STATE_PLAYING ->
>>>>> HEADSET_STATE_CONNECTED
>>>>> bluetoothd[9490]: audio/media.c:headset_state_changed()
>>>>> bluetoothd[9490]: audio/media.c:headset_state_changed()
>>>>> bluetoothd[9490]: audio/unix.c:client_free() client_free(0x7f59b52e54b0)
>>>> --
>>>> To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
>>>> the body of a message to majordomo@xxxxxxxxxxxxxxx
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>>>
>>>
>>>
>>> --
>>> BR / Pozdrawiam
>>> Łukasz
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