Hi Mohamed, Thanks for response. But I am able to play for a longer period without any problem. My problem is with start stop many time the player /dev/dsp sound goes off which comes back after hard (hardware) reboot only not with software reboot command. I tried out the entire sampling rate but issue us the same. I am using montavista linux kernel 2.6.10. I want to try out with latest kernel so please help me to find out the latest montavista kernel and the location to download?
Regards, Santosh ________________________________ From: Mohamed AbdElwahed [mailto:[email protected]] Sent: Monday, June 15, 2009 11:53 AM To: Santosh Singh Cc: Davinci Mailing list Subject: RE: Need help for missing sound after some time in /dev/dsp hi all, i faced similar problem before, and i work around by forcing the player to play fixed sample rate. or to convert the media file to certain sample rate. by expermind i found that you can play 44100, 48000, 32000 for any period of time without any sound drop, try this and kindly inform me if still you have the problem. -------------------------------------- Mohamed AbdElwahed Ibrahim [http://graphics.hotmail.com/i.p.emthup.gif] > From: [email protected] > To: [email protected] > Date: Mon, 15 Jun 2009 09:45:26 +0530 > CC: [email protected] > Subject: RE: Need help for missing sound after some time in /dev/dsp > > > > -----Original Message----- > From: Steve Chen [mailto:[email protected]] > Sent: Thursday, June 11, 2009 10:21 PM > To: Santosh Singh > Cc: [email protected] > Subject: RE: Need help for missing sound after some time in /dev/dsp > > On Thu, 2009-06-11 at 18:32 +0530, Santosh Singh wrote: > > -----Original Message----- > > From: Steve Chen [mailto:[email protected]] > > Sent: Thursday, June 11, 2009 5:57 PM > > To: Santosh Singh > > Cc: [email protected] > > Subject: Re: Need help for missing sound after some time in /dev/dsp > > &g t; > On Thu, 2009-06-11 at 14:17 +0530, Santosh Singh wrote: > > > Hi All, > > > > > > We are writing small application on TI's DM6446 evaluation board. > > > > > > I am facing sound related problem i.e., with /dev/dsp. > > > > > > When we are playing some .wav file using na_play ,I could hear the sound > > > for a longer period without any problem. > > > > > > > > > > > > But from a C routine when we are executing a shell script using system > > > call() to play a .wav file continuously for a period of time in a for > > > loop. > > > > > > After some time around 2-5 min sound goes off, but shell script is still > > > being called by c routine and even after reboot sound doesn't come up. > > > > > > Finally we have to do a hard reset to reboot the system to correct this > > > sound problem. > > > > > > ; > > > > > > I don't find any error messages in dmesg. > > > > > > Even command fuser -v /dev/dsp shows only my application name. > > > > > > Sample code: > > > > > > C routine: > > > > > > > > > > > > for (int i=0; i< 1000; i++ ) > > > > > > system ("./na_play tem.wav"); > > > > > > na_play is the player in current directory and > > > > > > tem.wav is the .wav file to play. > > > > > > Please help to find out actual problem and solution if possible. > > > > > > > > > Regards, > > > > > > Santosh > > > > > > > A few qustions > > > > 1. Which kernel are you using. > > 2. Can you reproduce the problem playing a long sound file? > > > > I recall reading a bug report sometime ago that start/stop audio > > repeatedly can cause audio to stop working which is what you are doing. > > > > Regards, > > Steve > > > > > > Hi Steve, > > Thanks for your response. > > 1. Kernel version is 2.6.10 montavista-linux > > 2. We are not able to reproduce the problem with long file, only with short > > file when playing one after the other. i.e. when I try to run a sample file > > as mentioned in my previous mail in a loop I find that the sound goes off > > after few minutes. > > When I do a soft reboot with "reboot" command and try to play any .wav file > > I don't get any sound. I need to do hard reboot to fix this issue. > > I'm not too familiar with 2.6.10 sound as it has the old OSS instead of > ALSA found in later kernels. You may want to consider using a later > kernel - either TI L SP2.0/MVL Pro 5.0 or the DaVinci GIT tree. > > If for some reasons, you are unable to move to newer kernel. Make sure > you have all the latest updates. There was a substantial rewrite of > DaVinci OSS driver during LSP 1.3 where a bunch of issues were fixed. > > Regards, > > Steve > > > Hi Steve, > Thanks for your response. > As you suggested to use the latest kernel rather than using 2.6.10 for > /dev/dsp sound missing problem when I do multiple time start and stop sound. > > Can I get some other solution may be some patch available for /dev/dsp kernel > 2.6.10 or some modification in sound code so that I can build kernel here to > fix the above issue? > > Thanks in advance. > > Regards, > Santosh > > > > http://www.mindtree.com/email/disclaimer.html > > _______________________________________________ > Davi nci-linux-open-source mailing list > [email protected] > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source ________________________________ Invite your mail contacts to join your friends list with Windows Live Spaces. It's easy! Try it!<http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx&mkt=en-us> ________________________________ http://www.mindtree.com/email/disclaimer.html
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