I know little of ALSA or Bluez, so I don't know the detail inside. 1. attached log files: Blue-startup.log: the log information when "hcid -d -n" start to run Bluez-play.log: during a helix based player playback an audio stream, the log information from hcid. 2. ALSA api snd_pcm_hw_params() --> snd_pcm_prepare() --> pcm->fast_ops->prepare(pcm->fast_op_arg) I guess it will call to (from printf log, it does) File: audio/pcm_bluetooth.c Function: bluetooth_prepare() And in this function, it will use the return value from write(data->pipefd[1],&c,1) as its (bluetooth_prepare) return value.---- I think the positive return value "1" was create here; but I don't know whether there should be some place to translate this value to a valid return value of ALSA API. And I also don't what "1" is valid return value from the write() function. BR >-----Original Message----- >From: Holtmann, Marcel >Sent: 2008年5月14日 21:08 >To: Zhao, Halley; Wong, James Sing Toh >Cc: Guo, Young >Subject: RE: An Issue with A2dpd and some suggestions > >Hi Halley, > >does a call to snd_pcm_hw_params() gets re-directed to the Bluetooth plugin >from the ALSA API? What is the actual call chain for it. > >Personally I would say this is an ALSA problem, but it could also be a BlueZ >problem since I must admit the ALSA plugins APIs are not really clear and >the possibility that we made a mistake is quite high. > >Please run "hcid -n -d" and then copy the output from your application >calling sndP_pcm_hw_params() so we see where inside the BlueZ code we are >actually. My wild guess is that if it is a BlueZ issue, then this will be >hidden somewhere non obvious. Please put this result on the BlueZ mailing >list so Luiz can have a look at it, too. > >Regards > >Marcel > >>-----Original Message----- >>From: Zhao, Halley >>Sent: Wednesday, May 14, 2008 1:34 AM >>To: Holtmann, Marcel; Wong, James Sing Toh >>Cc: Guo, Young; Zhao, Halley >>Subject: FW: An Issue with A2dpd and some suggestions >> >> Hi Marcel: >> With your (and bluez community) help, finally I installed bluez-3.31 >on >>my desktop. Great thanks. >> >> But I still have the issue that snd_pcm_hw_params() give a return value >>of "1" which is undefined meaning for this API. After I hack that return >>value to 0 (success). A helix based player (RP4MID) could work well on this >>package. >> >> But I still don't know where the root cause is, James is more cared >about >>it. >> >> Thanks BR. >> " >http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m.html >> int snd_pcm_hw_params () >> Returns: >> 0 on success otherwise a negative error code >> " >> >> >> -----Original Message----- >>From: Holtmann, Marcel >>Sent: 2008年5月9日 21:09 >>To: Zhao, Halley >>Cc: Guo, Young; Zheng, Huan; Tang, Feng; Lynch, Rusty >>Subject: RE: An Issue with A2dpd and some suggestions >> >> Hi Halley, >> >> can you please mail this bug report to the bluez-devel mailing list. >Then >>we have more experts looking at it. There is also a avinfo tool inside the >>bluez-utils packages that allows you to discover details on the A2DP >>features supported by your headset. >> >> >> Additionally you should check that the ALSA or GStreamer plugins are >>installed at the right location. Sometimes it happens that the wrong one >is >>used and that makes it incompatible. >> >> Regards >> >> Marcel >> >> >-----Original Message----- >> >From: Zhao, Halley >> >Sent: Friday, May 09, 2008 3:23 AM >> >To: Holtmann, Marcel >> >Cc: Guo, Young; Zheng, Huan; Tang, Feng; Lynch, Rusty >> >Subject: RE: An Issue with A2dpd and some suggestions >> > >> > Hi Marcel: >> > My Bluetooth earphone is Motorola HT820. >> > >> > 1. When I try to use bluez-utils 3.31 on my desktop (Ubuntu7.10), >>there >> >are some issues: (but there is no such issue when I use 3.19 version >on >> >this same platform). Should I update some other package besides bluez- >>utils >> >and bluez-libs? >> > " >> > halley@azhao2ubtg2:~$ aplay >/home/halley/media/audio/Track27.wav >> > ALSA lib pcm_bluetooth.c:1501:(audioservice_recv) Error >receiving data >> >from audio service: Success(0) >> > ALSA lib pcm_bluetooth.c:1517:(audioservice_expect) Bogus >message >> >BT_GETCAPABILITIES_REQ received while BT_GETCAPABILITIES_RSP was >>expected >> > aplay: main:545: audio open error: Invalid argument >> > " >> > >> > 2. When I use bluez-utils 3.19 version, application calls >> >snd_pcm_hw_params() sometimes will got return value "1". (The >function >> >description says it will be 0 for success and negative number for >>failure). >> >The positive value makes me puzzled. >> > >> > /* Apply parameters */ >> > err = snd_pcm_hw_params(m_pAlsaPCMHandle, hwparams); >> > if (err < 0) >> > { >> > HXLOGL1 ( HXLOG_ADEV, "snd_pcm_hw_params: %s", >> > snd_strerror(err)); >> > m_wLastError = RA_AOE_NOTENABLED; >> > } >> > >> > /* read buffer & period sizes */ >> > snd_pcm_uframes_t buffer_size = 0; >> > snd_pcm_uframes_t period_size = 0; >> > >> > if (err == 0) >> > { >> > >> > >-----Original Message----- >> > >From: Holtmann, Marcel >> > >Sent: 2008年4月29日 19:01 >> > >To: Zhao, Halley >> > >Cc: Li, Frank; Guo, Young; Zheng, Huan; Tang, Feng; Lynch, Rusty >> > >Subject: RE: An Issue with A2dpd and some suggestions >> > > >> > >Hi Halley, >> > > >> > >if you read the ChangeLog file it clearly states that you need >> > >bluez-libs-3.30 to use bluez-utils-3.30. >> > > >> > >You can find bluez-utils-3.28 at the same position you >downloaded >>3.30 >> >from. >> > >However there is no link it, but the packages are still >available. >> >However >> > >in case of 3.28 you need at least bluez-libs-3.28 to match up >with >>it. >> > > >> > >Regards >> > > >> > >Marcel >> > > >> > > >> > >-----Original Message----- >> > >From: Zhao, Halley >> > >Sent: Tue 4/29/2008 2:12 AM >> > >To: Holtmann, Marcel >> > >Cc: Li, Frank; Guo, Young; Zheng, Huan; Tang, Feng; Lynch, Rusty >> > >Subject: RE: An Issue with A2dpd and some suggestions >> > > >> > >??Hi Marcel: >> > >??When I tried bluez-utils-3.30, I was block by error: >> > >??"hciconfig.c:(.text+0x37ee): undefined reference to >> > >`hci_write_inquiry_transmit_power_level' >> > >??hciconfig.c:(.text+0x3823): undefined reference to >> > >`hci_read_inquiry_transmit_power_level' >> > >??" >> > >?? >> > >??Where could I get 3.28 version ? >> > >?? >> > >?? >> > >??>-----Original Message----- >> > >??>From: Holtmann, Marcel >> > >??>Sent: 2008?4?29? 15:46 >> > >??>To: Zhao, Halley >> > >??>Cc: Li, Frank; Guo, Young; Zheng, Huan; Tang, Feng; Lynch, >Rusty >> > >??>Subject: RE: An Issue with A2dpd and some suggestions >> > >??> >> > >??>Hi Halley, >> > >??> >> > >??>the latest version of bluez-utils is 3.30 and I am just about >to >> >release >> > >??>3.31. When you talk about 3.19, then you talk about a release >that >>is >> > >over >> > >??>7 month old. In some cases that might be fine, but with a topic >>like >> >A2DP >> > >??>it is not. Simply download bluez-utils-3.30 and look at the >>ChangeLog >> > >file. >> > >??>It has the highlights of changes and you will see a lot of >them in >> > >direction >> > >??>of A2DP. If you stick with 3.19 you might get it working, but >you >> >might >> > >also >> > >??>discover all the fixed bugs over and over again. >> > >??> >> > >??>You can clone a copy from the git://git.infradead.org/bluez- >>utils.git >> > >??>mirror and then run "gitk audio" to see only the audio service >>(A2DP >> >and >> > >??>Headset) related changes and then judge for yourself. >> > >??> >> > >??>With Ubuntu Hardy you get at least 3.26 and even that is >already >> >pretty >> > >old. >> > >??>The best choice might be too look at some updates packages >from >> >Debian, >> > >??>because I remember that they already packaged 3.30 and my >advise >> >would >> > >be >> > >??>to wait until the end of this week when I actually release >3.31 >>since >> > >that >> > >??>has a lot of fixes in it. >> > >??> >> > >??>If you don't wanna wait, the best release would be currently >the >> >3.28, >> > >??>because that was before we introduced the new API. Once 3.31 >is >>out >> > >??>everything is back to normal again. However with 3.28 the >services >> >are >> > >in >> > >??>a separate process and with 3.31 everything will be a plugin >(just >> >for >> > >the >> > >??>technical clarification). >> > >??> >> > >??>Regards >> > >??> >> > >??>Marcel >> > >??> >> > >??>-----Original Message----- >> > >??>From: Zhao, Halley >> > >??>Sent: Mon 4/28/2008 10:54 PM >> > >??>To: Holtmann, Marcel >> > >??>Cc: Li, Frank; Guo, Young; Zheng, Huan; Zhao, Halley; Tang, >Feng; >> >Lynch, >> > >??>Rusty >> > >??>Subject: RE: An Issue with A2dpd and some suggestions >> > >??> >> > >??>??Hi Marcel: >> > >??>??Our OS is Ubuntu based, and there is bluez-utils >(3.19-0ubuntu3) >> > >??>installed. >> > >??>??The package information gives us the link >> > >http://bluez.sourceforge.net, >> > >??>and it is same to http://www.bluez.org/, do you think the 3.19 >> >version >> > >is >> > >??>ok for us? >> > >??>?? >> > >??>??Is it correct? >> > >??>??If not, how could we remove the "plugz" and install >bluez-utils? >> > >??>??Must we start from the source package from >>http://www.bluez.org/? >> > >??>?? >> > >??>?? >> > >??>?? >> > >??>??>-----Original Message----- >> > >??>??>From: Holtmann, Marcel >> > >??>??>Sent: 2008?4?28? 17:53 >> > >??>??>To: Zheng, Huan >> > >??>??>Cc: Zhao, Halley; Li, Frank; Guo, Young >> > >??>??>Subject: RE: An Issue with A2dpd and some suggestions >> > >??>??> >> > >??>??>Hi Huan, >> > >??>??> >> > >??>??>there is a simple answer to this. You are using the plugz >code >>and >> > >that >> > >??>is >> > >??>??>wrong. This code is outdated and deprecated. The >bluez-utils >> >packages >> > >??>??>contains the audio service (which is now actually a plugin) >and >> >has >> > >??>plugins >> > >??>??>for ALSA and GStreamer integration. This audio service >fully >> >supports >> > >??>A2DP >> > >??>??>and is widely tested. Check wiki.bluez.org for more >details on >>how >> > >to >> > >??>setup >> > >??>??>your .asoundrc for testing it. >> > >??>??> >> > >??>??>Regards >> > >??>??> >> > >??>??>Marcel >> > >??>??> >> > >??>??>-----Original Message----- >> > >??>??>From: Zheng, Huan >> > >??>??>Sent: Sun 4/27/2008 10:11 PM >> > >??>??>To: Holtmann, Marcel >> > >??>??>Cc: Zhao, Halley; Li, Frank; Guo, Young; Zheng, Huan >> > >??>??>Subject: An Issue with A2dpd and some suggestions >> > >??>??> >> > >??>??>Hi, Marcel >> > >??>??> >> > >??>??>I'm an engineer from OTC PRC, I'm currently working >moblin. >> > >??>??> >> > >??>??>I encountered an issue when using Bluetooth alsa on Crown >>Beach, >> >and >> > >I >> > >??>have >> > >??>??>located the code where cause the issue, it may be a >potential >>bug, >> > >but >> > >??>I'm >> > >??>??>not sure. Since you are the expert on Bluetooth-alsa, very >much >> > >??>appreciate >> > >??>??>your opinions. >> > >??>??> >> > >??>??> >> > >??>??> >> > >??>??>Symptom: >> > >??>??> >> > >??>??>After finished playing one song, then opening another song >will >> >hear >> > >??>nothing, >> > >??>??>and finally hang. >> > >??>??> >> > >??>??> >> > >??>??> >> > >??>??>Investigation: >> > >??>??> >> > >??>??>Code hang on snd_pcm_prepare, which finally goes into >> > >??>??>a2dp_prepare(snd_pcm_ioplug_t * io) inside >> > >??>??>plugz/alsa-plugin/a2dpd/pcm_a2dpd.c >> > >??>??> >> > >??>??>Code hangs on >> > >??>??> >> > >??>??>while(poll_accept(a2dp->sk, 0)) { >> > >??>??> >> > >??>??> transfer = recv_socket(a2dp->sk, >> > >&GetPointerResp, >> > >??>??>sizeof(GetPointerResp)); >> > >??>??> >> > >??>??> } >> > >??>??> >> > >??>??>At this place, poll_accept always return true, but inside >> > >recv_socket, >> > >??>recv >> > >??>??>call report errono 104(connection reset by peer). This >becomes >>an >> > >??>infinite >> > >??>??>loop. >> > >??>??> >> > >??>??> >> > >??>??> >> > >??>??>Suggestions: >> > >??>??> >> > >??>??>I'm thinking that is it possible to add functionality into >> >poll_accept >> > >??>to >> > >??>??>judge whether connection has been reset? If find >connection has >> >been >> > >??>reset, >> > >??>??>then do some recovery and return 0 to let the while loop >end. >> > >??>??>There is a new bit since 2.6.17, maybe this will be helpful >to >> >judge >> > >??>whether >> > >??>??>connection has been reset when using poll. >> > >??>??> >> > >??>??>POLLRDHUP " (since Linux 2.6.17)" >> > >??>??> >> > >??>??>Stream socket peer closed connection, or shut down writing >half >>of >> > >??>??>connection. The _GNU_SOURCE feature test macro must be >defined >>in >> > >order >> > >??>to >> > >??>??>obtain this definition. >> > >??>??> >> > >??>??> >> > >??>??> >> > >??>??>Could you please share your opinions on this? >> > >??>??> >> > >??>??>Thanks a lot! >> > >??>??> >> > >??>??> >> > >??>??> >> > >??>??> >> > >??>??> >> > >??>??>For your convenience, I attached the code below: >> > >??>??> >> > >??>??>int poll_accept(int sockfd, int timeout) >> > >??>??> >> > >??>??>{ >> > >??>??> >> > >??>??> int result = 0; >> > >??>??> >> > >??>??> int ipoll = -1; >> > >??>??> >> > >??>??> struct pollfd pollfds[1]; >> > >??>??> >> > >??>??> pollfds[0].fd = sockfd; >> > >??>??> >> > >??>??> pollfds[0].events = POLLIN; >> > >??>??> >> > >??>??> pollfds[0].revents = 0; >> > >??>??> >> > >??>??> >> > >??>??> >> > >??>??> ipoll = poll(pollfds, (nfds_t)1, timeout); >> > >??>??> >> > >??>??> >> > >??>??> >> > >??>??> if((ipoll>0) && (pollfds[0].revents & POLLIN)) >{ >> > >??>??> >> > >??>??> result = 1; >> > >??>??> >> > >??>??> } else if(ipoll==0) { >> > >??>??> >> > >??>??> errno = EAGAIN; >> > >??>??> >> > >??>??> } >> > >??>??> >> > >??>??> return result; >> > >??>??> >> > >??>??>} >> > >??>??> >> > >??>??> >> > >??>??> >> > >??>??>ssize_t recv_socket(int sockfd, void* buffer, size_t >size) >> > >??>??> >> > >??>??>{ >> > >??>??> >> > >??>??> ssize_t received = 0; >> > >??>??> >> > >??>??> while((buffer!=0) && (received<(ssize_t)size)) >> > >??>??> >> > >??>??> { >> > >??>??> >> > >??>??> ssize_t result = recv(sockfd, >buffer+received, >> > >??>??>size-received, MSG_NOSIGNAL); >> > >??>??> >> > >??>??> if(result>0) >> > >??>??> >> > >??>??> { >> > >??>??> >> > >??>??> received += result; >> > >??>??> >> > >??>??> if(result != (ssize_t)size) >> > >??>??> >> > >??>??> DBG("split frame >received >> > >(%d/%d)", >> > >??>??>(int)result, (int)size); >> > >??>??> >> > >??>??> } >> > >??>??> >> > >??>??> else >> > >??>??> >> > >??>??> { >> > >??>??> >> > >??>??> received=result; >> > >??>??> >> > >??>??> break; >> > >??>??> >> > >??>??> } >> > >??>??> >> > >??>??> } >> > >??>??> >> > >??>??> return received; >> > >??>??> >> > >??>??>} >> > >??>??> >> > >??>??>Best Regards, Zheng, Huan(ZBT) >> > >??>??> >> > >??>??>OTC/SSD/SSG >> > >??>??> >> > >??>??>Intel Aisa-Pacific Research & Developement Ltd >> > >??>??> >> > >??>??>Tel: 021-6116 6435 >> > >??>??> >> > >??>??>Inet: 8821 6435 >> > >??>??> >> > >??>??>Cub: 3W035 >> > >??>??> >> > >??>??> >> > >??>??> >> > >??>?? >> > >?? >> >
Attachment:
bluez-play.log
Description: bluez-play.log
Attachment:
bluez-startup.log
Description: bluez-startup.log
------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________ Bluez-devel mailing list Bluez-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/bluez-devel
