Hi,
first please read the mail to ecasound-list below.
It seems that with newer ALSA versions, snd_pcm_read[in]() sometimes
returns -EIO even though documentation says nothing about this. After some
testing this seems to not happen on direct hw-access, only with
the pcm_plugin. The EIO comes from snd_pcm_wait().
Is this a bug or or a feature?
Btw; the error does not seem to be critical. If I handle
the EIO the same way as EPIPE (i.e. run xrun
handling code), the recording will continue fine.
---------- Forwarded message ----------
Date: Fri, 21 Mar 2003 12:45:53 +0000
From: The Eye <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: [ecasound] important recording broke. why?
Yesterday I had an important recording (a radio-show I did) ... I had it
scheduled via at, the same command I always use, i.e.
ecasound -b:2048 -z:intbuf -z:db,200000 -r -ev -t:8400 -f:s16_le,2,44100
-i:alsa,default -o:laermraw.raw
OK, this has always worked ... now I read my mails today, and what do I
see in my inbox? the following:
****************************************************************************
* ecasound v2.2.2-pre1 (C) 1997-2003 Kai Vehmanen
****************************************************************************
- [ Session created ] ------------------------------------------------------
- [ Chainsetup created (cmdline) ] -----------------------------------------
(eca-chainsetup-parser) Setting buffersize to (samples) 2048.
(eca-chainsetup-parser) Enabling extra buffering on realtime devices.
(eca-chainsetup-parser) Using double-buffer of 200000 sample frames.
(eca-chainsetup) Raised-priority mode enabled. (prio:50)
(eca-chainsetup-parser) Set processing time to 8400.00.
- [ Connecting chainsetup ] ------------------------------------------------
(eca-chainsetup) 'rt' buffering mode selected.
(eca-chainsetup) Audio object "alsa", mode "read".
(audio-io) Format: s16_le, channels 2, srate 44100, interleaved.
(eca-chainsetup) Audio object "laermraw.raw", mode "read/write".
(audio-io) Format: s16_le, channels 2, srate 44100, interleaved.
- [ Chainsetup connected ] -------------------------------------------------
(eca-controller) Connected chainsetup: "command-line-setup".
- [ Controller/Starting batch processing ] ---------------------------------
- [ Engine init - Driver start ] -------------------------------------------
(eca-engine) Prefilling i/o buffers.
(audioio-alsa) warning! playback overrun - samples lost! Break was at least
0.05 ms long.
(audioio-alsa) Read error! Stopping operation.
Warning: DBC_REQUIRE failed - "samples_read >= 0", samplebuffer.cpp, 757.
sh: line 61: 2821 Segmentation fault ecasound -b:2048 -z:intbuf
-z:db,200000 -r -ev -t:8400 -f:s16_le,2,44100 -i:alsa,default -o:laermraw.raw
is this a bug? btw this happened after approx. 2 minutes of recording ..
since I myself wasn't present (I was in the studio, doing the radio show
that should have been recorded), the recording is of course lost .. darn!
--
Michael Hellwig aka The Eye olymp.idle.at admin
check out http://homepage.uibk.ac.at/~csaa5128 for gpg public key
and don't hesitate to look at http://laerm.or.at
--
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