Bad file descriptor : -EBADFD

Bad file descriptor : -EBADFD

[Irfan Shaikh]

Hello

           In the below logic, snd_pcm_write always returns -EBADFD . snd_pcm_writei not at all recovers from this state infinitly.
How can i solve this problem.

while(1)
{
     /*Read from capture device*/
    snd_pcm_writei(()
   if(error)
       xrun_recovery(pAlsaConfigP->playback_handle, retVal);
}

**** ERROR values returned from snd_pcm_writei:
Only forst time : -11
Follwed by  -EBADFD always



static int xrun_recovery(snd_pcm_t *handle, int err)
{
    if (err == -EPIPE) {    /* under-run */
        err = snd_pcm_prepare(handle);
        if (err < 0)
            printf("Can't recovery from underrun, prepare failed: %s\n", snd_strerror(err));
        return 0;
     }
     else if (err == -ESTRPIPE) {
         while ((err = snd_pcm_resume(handle)) == -EAGAIN)
             sleep(1);       /* wait until the suspend flag is released */
             if (err < 0)
             {
                 err = snd_pcm_prepare(handle);
                 if (err < 0)
                     printf("Can't recovery from suspend, prepare failed: %s\n", snd_strerror(err));
             }
             return 0;
     }
     return err;
}


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Re: Bad file descriptor : -EBADFD

[Clemens Ladisch]

Irfan Shaikh wrote:
> -EBADFD

This is used by ALSA to tell you that the device is not in the correct
state for the function.  In this case, I'd guess that snd_pcm_hw_params
was not called or did not succeed.

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Regards,
Clemens

Re: Bad file descriptor : -EBADFD

[Irfan Shaikh]

Thanks for your comment !

I have used following check and it is success.
Even if the below API is succes still i get -EBADFD.....How can i resolve the issue ?

 if (snd_pcm_hw_params(alsaParams->playback_handle,                                  \
                          alsaParams->hwparams_playback) < 0)
    {
        snd_pcm_close(alsaParams->playback_handle);
        alsaParams->playback_handle = NULL;
        free(alsaParams);
        alsaParams = NULL;
        RSE_TRACE_ERROR (IPOD_AUDIO_THREAD_DEBUG,("Error setting HW params."));
        return NULL;
    }

________________________________________
From: Clemens Ladisch [clemens@ladisch.de]
Sent: Wednesday, March 23, 2011 5:00 PM
To: Irfan Shaikh
Cc: alsa-devel@alsa-project.org
Subject: Re: [alsa-devel] Bad file descriptor : -EBADFD

Irfan Shaikh wrote:
> -EBADFD

This is used by ALSA to tell you that the device is not in the correct
state for the function.  In this case, I'd guess that snd_pcm_hw_params
was not called or did not succeed.

> SASKEN BUSINESS DISCLAIMER: ...

*** DISCLAIMER ***
This e-mail contains public information intended for any subscriber of
this mailing list and for anybody else who bothers to read it; it will
be copied, disclosed and distributed to the public.  If you think you
are not the intended recipient, please commit suicide immediately.
These terms apply also to any e-mails quoted in, referenced from, or
answering this e-mail, and supersede any disclaimers in those e-mails.
Additionally, disclaimers in those e-mails will incur legal processing
fees of $42 per line; you have agreed to this by reading this disclaimer.


Regards,
Clemens

Re: Bad file descriptor : -EBADFD

[Clemens Ladisch]

Irfan Shaikh wrote:
> I have used following check and it is success.
> 
>  if (snd_pcm_hw_params(alsaParams->playback_handle,                                  \
>                           alsaParams->hwparams_playback) < 0)

Check the device's current state with snd_pcm_state(); it should be PREPARED.


Regards,
Clemens

Re: Bad file descriptor : -EBADFD

[Irfan Shaikh]

Hi Clemens,

Thanks for your reply

It is in PREPARED state at time of configuration.
But later when i use snd_pcm_writei first returns -11, then -77 then continous -EBADFD infinitely

To fix this i close my playback device and reconfigure it when above happens, then plays fine...This is fix. but not the solution.

Is there any other way of comming out of EBADFD to normal PREPARE state.

Regards,
Irfan


________________________________________
From: Clemens Ladisch [clemens@ladisch.de]
Sent: Wednesday, March 23, 2011 9:24 PM
To: Irfan Shaikh
Cc: alsa-devel@alsa-project.org
Subject: Re: [alsa-devel] Bad file descriptor : -EBADFD

Irfan Shaikh wrote:
> I have used following check and it is success.
>
>  if (snd_pcm_hw_params(alsaParams->playback_handle,                                  \
>                           alsaParams->hwparams_playback) < 0)

Check the device's current state with snd_pcm_state(); it should be PREPARED.


Regards,
Clemens

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 virus transmitted by this email.
Read Disclaimer at http://www.sasken.com/extras/mail_disclaimer.html

Re: Bad file descriptor : -EBADFD

[Clemens Ladisch]

Irfan Shaikh wrote:
> It is in PREPARED state at time of configuration.

And in what state is it when the error happens?

> SASKEN BUSINESS DISCLAIMER: ...

*** DISCLAIMER ***
This e-mail contains public information intended for any subscriber of
this mailing list and for anybody else who bothers to read it; it will
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These terms apply also to any e-mails quoted in, referenced from, or
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Additionally, disclaimers in those e-mails will incur legal processing
fees of $42 per line; you have agreed to this by reading this disclaimer.


Regards,
Clemens