On Saturday 18 April 2015 09:54, Raymond Yau wrote:
Hi,
The following assert is being hit in pcm_params.c:
"pcm_params.c:2249: snd1_pcm_hw_params_slave: Assertion `err >= 0'> failed."
This is from a developer using Portaudio in his own application; I have yet to ascertain full details, but it is trying successive sample rates to see which are valid.
Does this point to a flaw in the configuration or possibly a bug in Alsa-lib or can it occur just as a result of misuse of the Alsa API?
http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m___h_w___params. html
Only snd_pcm_hw_params_test_rate() can be call multiple times, Verify if a rate is available inside a configuration space for a PCM.
Those snd_pcm_hw_params_ser_rate* functions restrict the configuration space to one rate and can be called once only
The stream is being opened and closed at each attempt.
Regards
Alan