[alsa-devel] Bad file descriptor : -EBADFD
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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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
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.
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Regards, Clemens
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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Irfan Shaikh wrote:
It is in PREPARED state at time of configuration.
And in what state is it when the error happens?
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Regards, Clemens
participants (2)
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Clemens Ladisch -
Irfan Shaikh