Linux-audio-dev

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7445 discussions

[PATCH] [SOUND] Fixes recording gain control

by Viral Mehta

Have tested two usb audio mic devices. At the time of initialization, SNDRV_MIXER_OSS_PRESENT_PVOLUME bit is not set for MIC (slot 7). So, the same should not be checked when an application tries to do gain control for audio recording devices. Just check slot->present for SNDRV_MIXER_OSS_PRESENT_CVOLUME independently. Verified with a simple application which opens /dev/dsp for recording and /dev/mixer for volume control. Signed-off-by: Viral Mehta <viral.mehta(a)einfochips.com> --- sound/core/oss/mixer_oss.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/sound/core/oss/mixer_oss.c b/sound/core/oss/mixer_oss.c index 4690b8b..919c7eb 100644 --- a/sound/core/oss/mixer_oss.c +++ b/sound/core/oss/mixer_oss.c @@ -690,7 +690,7 @@ static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer, if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) { snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right); - if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) + } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) { snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right); } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) { snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right); -- 1.5.3.3 -- _____________________________________________________________________ Disclaimer: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer. Any views expressed in this message are those of the individual sender unless otherwise stated.Company has taken enough precautions to prevent the spread of viruses. However the company accepts no liability for any damage caused by any virus transmitted by this email. __________________________________________________________________________

15 years, 6 months

[Fwd: Audio mixer recording gain control]

by Viral Mehta

Hello all, I would like to know feedback here if possible. Or is it a wrong place to submit patches which I "think" fixes some issue in oss simulation layer ? > Hi, > > I am trying to do gain control while RECORDING for my Audio Mic device. > > My application opens /dev/mixer device and calls ioctl(fdmixer, > MIXER_WRITE(SOUND_MIXER_MIC), ...) > > But, the call fails. It traces to sound/core/oss/mixer_oss.c file and > snd_mixer_oss_put_volume1() function. > It never falls in "if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME)" > as condition "if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) " > comes as false. > > I think there is a bug in kernel and I think it should be like as below, > > --- a/sound/core/oss/mixer_oss.c 2008-12-03 13:24:02.000000000 +0530 > +++ b/sound/core/oss/mixer_oss.c 2009-03-09 16:22:06.548766896 +0530 > @@ -688,7 +688,7 @@ static int snd_mixer_oss_put_volume1(str > > if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) { > snd_mixer_oss_put_volume1_vol(fmixer, pslot, > slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right); > - if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) > + } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) { > snd_mixer_oss_put_volume1_vol(fmixer, pslot, > slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right); > } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) { > snd_mixer_oss_put_volume1_vol(fmixer, pslot, > slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right); > > > Thanks, > Viral > > > > > > -- _____________________________________________________________________ Disclaimer: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer. Any views expressed in this message are those of the individual sender unless otherwise stated.Company has taken enough precautions to prevent the spread of viruses. However the company accepts no liability for any damage caused by any virus transmitted by this email. __________________________________________________________________________

15 years, 6 months

LAC2009 update

by Fons Adriaensen

Hello all, Some good news: there definitely will be the Linux Sound Night during LAC2009. At the moment there are two possible locations, the choice has not yet been made. One is a nice bar located in a new industrial area outside the center - they only have one resident near (100m) but we may still have to watch the SPL because of that single resident. The other is a rather sleezy but otherwise OK place in a post-industrial area, here nobody will complain whatever we do. Both places (in particular the second) are a bit to far from the center for an easy walk, but transport will be organised. I'd like all who proposed to play at the LSN to confirm their presence (drop me a line), and there is still room for more. Wednesday the 15th (day before the conference) there will be the pizza evening for the early arrivals. This will be at 'Alfonso' (no relation) on Via Emilia Est, according to some the best pizzeria in Parma. It's also near the Auditorium Paganini making it a good place for a pre-concert pizza. Please let me know if you will be there as I'll have to book the places. Sunday evening we'll have the unofficial LAC2009 dinner. At the moment I'd like everyone who plans to come to LAC2009 to register so we can have an idea of the size of the crowds to expect, and of the number of proceedings to print. <http://lac.linuxaudio.org/2009> See you all in Parma, -- FA

15 years, 6 months

About mailing lists and linuxaudio.org (Was: Debian Multimedia Team)

by MarcO'Chapeau

On Mon, 9 Mar 2009 11:09:34 -0700, Mark Knecht <markknecht(a)gmail.com> wrote: > In general I agree with what I understand about linuxaudio.org and > your point of view. > > Probably I need to make a more nuanced distinction between > linuxaudio.org and linux-audio-user(a)lists.linuxaudio.org. It's likely > not true for you running all this stuff but from the outside I see the > two as very intertwined. If the business of linuxaudio.org were to > become a large part of what is discussed on this list, or the list was > to start pushing folks to become Debian based as a policy, then I'd be > disappointed. I think it's best if this list is distro neutral. What > linuxaudio.org does is a different thing. Well, hello again, this time from the list-admin part of me. I would like to clarify this for those who might be here since recently and who might not know of the history of our 4 favorite lists. The hosting at linuxaudio.org is relatively recent, and was chosen in an effort to make things look a little more organized. Our lists are kindly hosted there by the Virginia Tech Department of Music and DISIS. They were previously hosted at the University of Columbia (at the time there were 3 lists ; linux-audio-tuning did not yet exist). The first list created was, if I'm not mistaken, linux-audio-dev, a long time ago, in a galaxy far far away (1998 ?). While our lists are hosted at linuxaudio.org, they do not belong to anyone but the whole community that make them as lively and entertaining as they are. Moreover, they cannot be in any way related/associated/linked/whatever to one particular distribution. So feel free to talk about any distro you feel is good for audio, even slackware if you wish :p And one last thing, just so everything is crystal clear, since these list belong to everyone, you are also entitled to fire the list admin (that would be me) at anytime if I start being really bad at that ;) Kind regards, Marc-Olivier Barre, The guy who gets to read a lot of spam to keep those lists clean.

15 years, 6 months

Re: [LAD] [LAU] Join the Debian Multimedia Team! (to improve the state ofLinux audio)

by Ivica Ico Bukvic

> How does that effect me for instance as a Gentoo user? Please consider > whether LAU would still be a place of value to those of us that aren't > Debian/Ubuntu based. > > I don't mind the occasional distro specific conversation. I wouldn't > want to see that ever become more than 1% of what's discussed on a > list like this. > > - Mark Ideally, we would also want to have Gentoo involved in linuxaudio.org. However please note that I cannot (nor do I want to) coerce anyone to join linuxaudio.org. Yet, here we are with a potential opportunity to have Debian join us and my thoughts are we should not pass this up. I can only hope that Gentoo will join us as well--but that is not my call... Best wishes, Ico

15 years, 6 months

Re: [LAD] [Jack-Devel] [FFmpeg-devel] [PATCH] libavdevice: JACK demuxer

by Olivier Guilyardi

Michael, Paul has answered you on jack-devel. See below. Note: I'm cross-posting this mail to linux-audio-dev, since Michael has recently subscribed to it. At least, we should be able to discuss together in there. Paul Davis wrote : > I have no idea how any of you have kept this conversation going when one > of the main protagonists is not even subscribed to one of the two > mailing lists, and i suspect that one of the others isn't subscribed to > the other. perhaps the FFmpeg-devel list doesn't require membership. > > anyway, i've finally had enough of reading Michael's stuff about > buffers, timing and so forth and felt obligated to comment. > > michael - i would politely request that you stop shooting off at the > mouth about stuff that the JACK community has been dealing with for more > than 9 years. > > you do not need to write your own ring buffer code - JACK's is LGPL'ed > and you are free (and probably even recommended) to copy it. > furthermore, you would be very foolish to imagine (especially based on > your incredibly naive comments about uint8_t) that you understand the > subtleties of these buffers. the JACK community (and a couple of other > exclusively audio-focused development groups) have been working with > this buffer design for many, many years, and we are absolutely confident > that our buffers are (a) SMP/multi-core safe (b) as efficient as they > can be without using assembler. you should also be aware that there are > very good arguments for the current structure of the ringbuffer code, > which explicitly does NOT use any memory barriers. if you don't > understand why it works without them, then you should probably refrain > from commenting on the design of these buffers at all. > >

15 years, 6 months

audio

by Agustin Ruiz Gamez

¿Podrian ustedes instalarme su ssistema de audio a travez de internet? He tratado en muchas ocasiones de comunicarme con Ubuntu es, Pero ellos no reconocen este e-mail ni mi password. Les agradrzco. -- Agustin Ruiz Gamez

15 years, 6 months

Audio mixer recording gain control

by Viral Mehta

Hi, I am trying to do gain control while RECORDING for my Audio Mic device. My application opens /dev/mixer device and calls ioctl(fdmixer, MIXER_WRITE(SOUND_MIXER_MIC), ...) But, the call fails. It traces to sound/core/oss/mixer_oss.c file and snd_mixer_oss_put_volume1() function. It never falls in "if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME)" as condition "if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) " comes as false. I think there is a bug in kernel and I think it should be like as below, --- sound/core/oss/mixer_oss.c 2008-12-03 13:24:02.000000000 +0530 +++ sound/core/oss/mixer_oss.c 2009-03-09 16:22:06.548766896 +0530 @@ -688,7 +688,7 @@ static int snd_mixer_oss_put_volume1(str if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) { snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right); - if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) + } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) { snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right); } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) { snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right); Thanks, Viral -- _____________________________________________________________________ Disclaimer: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer. Any views expressed in this message are those of the individual sender unless otherwise stated.Company has taken enough precautions to prevent the spread of viruses. However the company accepts no liability for any damage caused by any virus transmitted by this email. __________________________________________________________________________

15 years, 6 months

Debian Lenny 5, the RT build....

by alex stone

Just a quick note here for those who may want to 'RT' their Debian Lenny, and the sheer enjoyment that will no doubt bring. Using the Kernel for Dummies debian build system (thanks fellas), Alsa 1.0.19, no OSS, vanilla 2.6.26, and Ingo's patches, all went reasonably well. (32bit) *****PLEASE NOTE, no women, children, animals, hungarian polka enthusiasts, or those poor wretched souls using Vista, were harmed during this build....***** Booted up ok, but got a kernel failure whilst cranking up my multi app script. Narrowed it down to Linuxsampler. When i removed LS, and Libgig, then reinstalled, the failure went away. All other apps played ok, with no probs. I can only guess that my compile options needed renewing, from generic to RT, but no real hardship, and it didn't take long. I'm passing this on, in case anyone else builds an debian RT kernel, and gets a kernel failure notice, once the OS is up and running, and linuxsampler is started. Alex. p.s. Have to say here, that debian 5 is excellent. Even with my clumsy machinations with the RT build, it just keeps going, and doesn't do silly stuff when assailed with multiple 'user errors.' Built like a tank. :) -- Parchment Studios (It started as a joke...)

15 years, 6 months

Audio Linux

by Agustin Ruiz Gamez

Estoy muy agradado por su preocupacion por mi problema de audio, El problema mio es que sus implementaciones son en idioma ingles y yo vivo en Venezuela donde hablamos español y no puedo traducior completamente los terminos alli explicados. Les agradeceria si ustedes tienen alguna version en español, me lo hicieran llegar. -- Agustin Ruiz Gamez

15 years, 7 months

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