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[Discuss-gnuradio] audio_alsa: problem with "valve" at head of audio_als
From: |
Marcus D. Leech |
Subject: |
[Discuss-gnuradio] audio_alsa: problem with "valve" at head of audio_alsa sink sub-graph |
Date: |
Sat, 23 Oct 2010 16:02:15 -0400 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.12) Gecko/20100907 Fedora/3.0.7-1.fc12 Thunderbird/3.0.7 |
In my application I have a sub-graph that terminates an an audio_alsa sink.
At the "head" of this sub-graph, I've placed a valve, so that I can turn
off data being
copied to the audio_alsa sink.
When this valve transitions from "closed" (data flowing) to "open" (data
*not* flowing), it provokes
the following error in audio_alsa_sink:
audio_alsa_sink[plughw:0,0]: snd_pcm_hw_params failed: File descriptor
in bad state
terminate called after throwing an instance of 'std::runtime_error'
what(): check topology failed on audio_alsa_sink(1) using ninputs=1,
noutputs
Am I being an idiot here? Should this work? If not, why not?
Further, there's a "OK to block" parameter for an audio_alsa_sink. What
does it do?
--
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
- [Discuss-gnuradio] audio_alsa: problem with "valve" at head of audio_alsa sink sub-graph,
Marcus D. Leech <=