Re: aplay failed on bluetooth audio with bluez 4.101
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From: Qingtao Cao <hidden>
Date: 2016-03-29 01:19:23
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 [off-list ref] 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 [off-list ref] wrote:quoted
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 [off-list ref] wrote:quoted
Hi Harry, On 18 March 2016 at 06:57, Qingtao Cao [off-list ref] wrote:quoted
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 [off-list ref] wrote:quoted
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 targetquoted
quoted
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@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html-- BR / Pozdrawiam Łukasz